diff options
Diffstat (limited to 'net/mac80211')
31 files changed, 15062 insertions, 0 deletions
diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig new file mode 100644 index 00000000000..d761b53fb84 --- /dev/null +++ b/net/mac80211/Kconfig @@ -0,0 +1,69 @@ +config MAC80211 + tristate "Generic IEEE 802.11 Networking Stack (mac80211)" + depends on EXPERIMENTAL + select CRYPTO + select CRYPTO_ECB + select CRYPTO_ARC4 + select CRYPTO_AES + select CRC32 + select WIRELESS_EXT + select CFG80211 + select NET_SCH_FIFO + ---help--- + This option enables the hardware independent IEEE 802.11 + networking stack. + +config MAC80211_LEDS + bool "Enable LED triggers" + depends on MAC80211 && LEDS_TRIGGERS + ---help--- + This option enables a few LED triggers for different + packet receive/transmit events. + +config MAC80211_DEBUG + bool "Enable debugging output" + depends on MAC80211 + ---help--- + This option will enable debug tracing output for the + ieee80211 network stack. + + If you are not trying to debug or develop the ieee80211 + subsystem, you most likely want to say N here. + +config MAC80211_VERBOSE_DEBUG + bool "Verbose debugging output" + depends on MAC80211_DEBUG + +config MAC80211_LOWTX_FRAME_DUMP + bool "Debug frame dumping" + depends on MAC80211_DEBUG + ---help--- + Selecting this option will cause the stack to + print a message for each frame that is handed + to the lowlevel driver for transmission. This + message includes all MAC addresses and the + frame control field. + + If unsure, say N and insert the debugging code + you require into the driver you are debugging. + +config TKIP_DEBUG + bool "TKIP debugging" + depends on MAC80211_DEBUG + +config MAC80211_DEBUG_COUNTERS + bool "Extra statistics for TX/RX debugging" + depends on MAC80211_DEBUG + +config MAC80211_IBSS_DEBUG + bool "Support for IBSS testing" + depends on MAC80211_DEBUG + ---help--- + Say Y here if you intend to debug the IBSS code. + +config MAC80211_VERBOSE_PS_DEBUG + bool "Verbose powersave mode debugging" + depends on MAC80211_DEBUG + ---help--- + Say Y here to print out verbose powersave + mode debug messages. diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile new file mode 100644 index 00000000000..79dea99bb48 --- /dev/null +++ b/net/mac80211/Makefile @@ -0,0 +1,19 @@ +obj-$(CONFIG_MAC80211) += mac80211.o rc80211_simple.o + +mac80211-objs-$(CONFIG_MAC80211_LEDS) += ieee80211_led.o + +mac80211-objs := \ + ieee80211.o \ + ieee80211_ioctl.o \ + sta_info.o \ + wep.o \ + wpa.o \ + ieee80211_sta.o \ + ieee80211_iface.o \ + ieee80211_rate.o \ + michael.o \ + tkip.o \ + aes_ccm.o \ + wme.o \ + ieee80211_cfg.o \ + $(mac80211-objs-y) diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c new file mode 100644 index 00000000000..e55569bee7d --- /dev/null +++ b/net/mac80211/aes_ccm.c @@ -0,0 +1,155 @@ +/* + * Copyright 2003-2004, Instant802 Networks, Inc. + * Copyright 2005-2006, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/types.h> +#include <linux/crypto.h> +#include <linux/err.h> +#include <asm/scatterlist.h> + +#include <net/mac80211.h> +#include "ieee80211_key.h" +#include "aes_ccm.h" + + +static void ieee80211_aes_encrypt(struct crypto_cipher *tfm, + const u8 pt[16], u8 ct[16]) +{ + crypto_cipher_encrypt_one(tfm, ct, pt); +} + + +static inline void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad, + u8 *b, u8 *s_0, u8 *a) +{ + int i; + + ieee80211_aes_encrypt(tfm, b_0, b); + + /* Extra Authenticate-only data (always two AES blocks) */ + for (i = 0; i < AES_BLOCK_LEN; i++) + aad[i] ^= b[i]; + ieee80211_aes_encrypt(tfm, aad, b); + + aad += AES_BLOCK_LEN; + + for (i = 0; i < AES_BLOCK_LEN; i++) + aad[i] ^= b[i]; + ieee80211_aes_encrypt(tfm, aad, a); + + /* Mask out bits from auth-only-b_0 */ + b_0[0] &= 0x07; + + /* S_0 is used to encrypt T (= MIC) */ + b_0[14] = 0; + b_0[15] = 0; + ieee80211_aes_encrypt(tfm, b_0, s_0); +} + + +void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch, + u8 *b_0, u8 *aad, u8 *data, size_t data_len, + u8 *cdata, u8 *mic) +{ + int i, j, last_len, num_blocks; + u8 *pos, *cpos, *b, *s_0, *e; + + b = scratch; + s_0 = scratch + AES_BLOCK_LEN; + e = scratch + 2 * AES_BLOCK_LEN; + + num_blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN; + last_len = data_len % AES_BLOCK_LEN; + aes_ccm_prepare(tfm, b_0, aad, b, s_0, b); + + /* Process payload blocks */ + pos = data; + cpos = cdata; + for (j = 1; j <= num_blocks; j++) { + int blen = (j == num_blocks && last_len) ? + last_len : AES_BLOCK_LEN; + + /* Authentication followed by encryption */ + for (i = 0; i < blen; i++) + b[i] ^= pos[i]; + ieee80211_aes_encrypt(tfm, b, b); + + b_0[14] = (j >> 8) & 0xff; + b_0[15] = j & 0xff; + ieee80211_aes_encrypt(tfm, b_0, e); + for (i = 0; i < blen; i++) + *cpos++ = *pos++ ^ e[i]; + } + + for (i = 0; i < CCMP_MIC_LEN; i++) + mic[i] = b[i] ^ s_0[i]; +} + + +int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch, + u8 *b_0, u8 *aad, u8 *cdata, size_t data_len, + u8 *mic, u8 *data) +{ + int i, j, last_len, num_blocks; + u8 *pos, *cpos, *b, *s_0, *a; + + b = scratch; + s_0 = scratch + AES_BLOCK_LEN; + a = scratch + 2 * AES_BLOCK_LEN; + + num_blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN; + last_len = data_len % AES_BLOCK_LEN; + aes_ccm_prepare(tfm, b_0, aad, b, s_0, a); + + /* Process payload blocks */ + cpos = cdata; + pos = data; + for (j = 1; j <= num_blocks; j++) { + int blen = (j == num_blocks && last_len) ? + last_len : AES_BLOCK_LEN; + + /* Decryption followed by authentication */ + b_0[14] = (j >> 8) & 0xff; + b_0[15] = j & 0xff; + ieee80211_aes_encrypt(tfm, b_0, b); + for (i = 0; i < blen; i++) { + *pos = *cpos++ ^ b[i]; + a[i] ^= *pos++; + } + + ieee80211_aes_encrypt(tfm, a, a); + } + + for (i = 0; i < CCMP_MIC_LEN; i++) { + if ((mic[i] ^ s_0[i]) != a[i]) + return -1; + } + + return 0; +} + + +struct crypto_cipher * ieee80211_aes_key_setup_encrypt(const u8 key[]) +{ + struct crypto_cipher *tfm; + + tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC); + if (IS_ERR(tfm)) + return NULL; + + crypto_cipher_setkey(tfm, key, ALG_CCMP_KEY_LEN); + + return tfm; +} + + +void ieee80211_aes_key_free(struct crypto_cipher *tfm) +{ + if (tfm) + crypto_free_cipher(tfm); +} diff --git a/net/mac80211/aes_ccm.h b/net/mac80211/aes_ccm.h new file mode 100644 index 00000000000..885f19030b2 --- /dev/null +++ b/net/mac80211/aes_ccm.h @@ -0,0 +1,26 @@ +/* + * Copyright 2003-2004, Instant802 Networks, Inc. + * Copyright 2006, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef AES_CCM_H +#define AES_CCM_H + +#include <linux/crypto.h> + +#define AES_BLOCK_LEN 16 + +struct crypto_cipher * ieee80211_aes_key_setup_encrypt(const u8 key[]); +void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *scratch, + u8 *b_0, u8 *aad, u8 *data, size_t data_len, + u8 *cdata, u8 *mic); +int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *scratch, + u8 *b_0, u8 *aad, u8 *cdata, size_t data_len, + u8 *mic, u8 *data); +void ieee80211_aes_key_free(struct crypto_cipher *tfm); + +#endif /* AES_CCM_H */ diff --git a/net/mac80211/hostapd_ioctl.h b/net/mac80211/hostapd_ioctl.h new file mode 100644 index 00000000000..34fa128e987 --- /dev/null +++ b/net/mac80211/hostapd_ioctl.h @@ -0,0 +1,108 @@ +/* + * Host AP (software wireless LAN access point) user space daemon for + * Host AP kernel driver + * Copyright 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> + * Copyright 2002-2004, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef HOSTAPD_IOCTL_H +#define HOSTAPD_IOCTL_H + +#ifdef __KERNEL__ +#include <linux/types.h> +#endif /* __KERNEL__ */ + +#define PRISM2_IOCTL_PRISM2_PARAM (SIOCIWFIRSTPRIV + 0) +#define PRISM2_IOCTL_GET_PRISM2_PARAM (SIOCIWFIRSTPRIV + 1) +#define PRISM2_IOCTL_HOSTAPD (SIOCIWFIRSTPRIV + 3) + +/* PRISM2_IOCTL_PRISM2_PARAM ioctl() subtypes: + * This table is no longer added to, the whole sub-ioctl + * mess shall be deleted completely. */ +enum { + PRISM2_PARAM_IEEE_802_1X = 23, + PRISM2_PARAM_ANTSEL_TX = 24, + PRISM2_PARAM_ANTSEL_RX = 25, + + /* Instant802 additions */ + PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES = 1001, + PRISM2_PARAM_DROP_UNENCRYPTED = 1002, + PRISM2_PARAM_PREAMBLE = 1003, + PRISM2_PARAM_SHORT_SLOT_TIME = 1006, + PRISM2_PARAM_NEXT_MODE = 1008, + PRISM2_PARAM_CLEAR_KEYS = 1009, + PRISM2_PARAM_RADIO_ENABLED = 1010, + PRISM2_PARAM_ANTENNA_MODE = 1013, + PRISM2_PARAM_STAT_TIME = 1016, + PRISM2_PARAM_STA_ANTENNA_SEL = 1017, + PRISM2_PARAM_FORCE_UNICAST_RATE = 1018, + PRISM2_PARAM_RATE_CTRL_NUM_UP = 1019, + PRISM2_PARAM_RATE_CTRL_NUM_DOWN = 1020, + PRISM2_PARAM_MAX_RATECTRL_RATE = 1021, + PRISM2_PARAM_TX_POWER_REDUCTION = 1022, + PRISM2_PARAM_KEY_TX_RX_THRESHOLD = 1024, + PRISM2_PARAM_DEFAULT_WEP_ONLY = 1026, + PRISM2_PARAM_WIFI_WME_NOACK_TEST = 1033, + PRISM2_PARAM_SCAN_FLAGS = 1035, + PRISM2_PARAM_HW_MODES = 1036, + PRISM2_PARAM_CREATE_IBSS = 1037, + PRISM2_PARAM_WMM_ENABLED = 1038, + PRISM2_PARAM_MIXED_CELL = 1039, + PRISM2_PARAM_RADAR_DETECT = 1043, + PRISM2_PARAM_SPECTRUM_MGMT = 1044, +}; + +enum { + IEEE80211_KEY_MGMT_NONE = 0, + IEEE80211_KEY_MGMT_IEEE8021X = 1, + IEEE80211_KEY_MGMT_WPA_PSK = 2, + IEEE80211_KEY_MGMT_WPA_EAP = 3, +}; + + +/* Data structures used for get_hw_features ioctl */ +struct hostapd_ioctl_hw_modes_hdr { + int mode; + int num_channels; + int num_rates; +}; + +struct ieee80211_channel_data { + short chan; /* channel number (IEEE 802.11) */ + short freq; /* frequency in MHz */ + int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */ +}; + +struct ieee80211_rate_data { + int rate; /* rate in 100 kbps */ + int flags; /* IEEE80211_RATE_ flags */ +}; + + +/* ADD_IF, REMOVE_IF, and UPDATE_IF 'type' argument */ +enum { + HOSTAP_IF_WDS = 1, HOSTAP_IF_VLAN = 2, HOSTAP_IF_BSS = 3, + HOSTAP_IF_STA = 4 +}; + +struct hostapd_if_wds { + u8 remote_addr[ETH_ALEN]; +}; + +struct hostapd_if_vlan { + u8 id; +}; + +struct hostapd_if_bss { + u8 bssid[ETH_ALEN]; +}; + +struct hostapd_if_sta { +}; + +#endif /* HOSTAPD_IOCTL_H */ diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c new file mode 100644 index 00000000000..48a832d4e17 --- /dev/null +++ b/net/mac80211/ieee80211.c @@ -0,0 +1,4970 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005-2006, Devicescape Software, Inc. + * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <net/mac80211.h> +#include <net/ieee80211_radiotap.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/etherdevice.h> +#include <linux/if_arp.h> +#include <linux/wireless.h> +#include <linux/rtnetlink.h> +#include <net/iw_handler.h> +#include <linux/compiler.h> +#include <linux/bitmap.h> +#include <net/cfg80211.h> + +#include "ieee80211_common.h" +#include "ieee80211_i.h" +#include "ieee80211_rate.h" +#include "wep.h" +#include "wpa.h" +#include "tkip.h" +#include "wme.h" +#include "aes_ccm.h" +#include "ieee80211_led.h" +#include "ieee80211_cfg.h" + +/* privid for wiphys to determine whether they belong to us or not */ +void *mac80211_wiphy_privid = &mac80211_wiphy_privid; + +/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ +/* Ethernet-II snap header (RFC1042 for most EtherTypes) */ +static const unsigned char rfc1042_header[] = + { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; + +/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ +static const unsigned char bridge_tunnel_header[] = + { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; + +/* No encapsulation header if EtherType < 0x600 (=length) */ +static const unsigned char eapol_header[] = + { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e }; + + +static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata, + struct ieee80211_hdr *hdr) +{ + /* Set the sequence number for this frame. */ + hdr->seq_ctrl = cpu_to_le16(sdata->sequence); + + /* Increase the sequence number. */ + sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ; +} + +struct ieee80211_key_conf * +ieee80211_key_data2conf(struct ieee80211_local *local, + const struct ieee80211_key *data) +{ + struct ieee80211_key_conf *conf; + + conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC); + if (!conf) + return NULL; + + conf->hw_key_idx = data->hw_key_idx; + conf->alg = data->alg; + conf->keylen = data->keylen; + conf->flags = 0; + if (data->force_sw_encrypt) + conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT; + conf->keyidx = data->keyidx; + if (data->default_tx_key) + conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY; + if (local->default_wep_only) + conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY; + memcpy(conf->key, data->key, data->keylen); + + return conf; +} + +struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata, + int idx, size_t key_len, gfp_t flags) +{ + struct ieee80211_key *key; + + key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags); + if (!key) + return NULL; + kref_init(&key->kref); + return key; +} + +static void ieee80211_key_release(struct kref *kref) +{ + struct ieee80211_key *key; + + key = container_of(kref, struct ieee80211_key, kref); + if (key->alg == ALG_CCMP) + ieee80211_aes_key_free(key->u.ccmp.tfm); + kfree(key); +} + +void ieee80211_key_free(struct ieee80211_key *key) +{ + if (key) + kref_put(&key->kref, ieee80211_key_release); +} + +static int rate_list_match(const int *rate_list, int rate) +{ + int i; + + if (!rate_list) + return 0; + + for (i = 0; rate_list[i] >= 0; i++) + if (rate_list[i] == rate) + return 1; + + return 0; +} + + +void ieee80211_prepare_rates(struct ieee80211_local *local, + struct ieee80211_hw_mode *mode) +{ + int i; + + for (i = 0; i < mode->num_rates; i++) { + struct ieee80211_rate *rate = &mode->rates[i]; + + rate->flags &= ~(IEEE80211_RATE_SUPPORTED | + IEEE80211_RATE_BASIC); + + if (local->supp_rates[mode->mode]) { + if (!rate_list_match(local->supp_rates[mode->mode], + rate->rate)) + continue; + } + + rate->flags |= IEEE80211_RATE_SUPPORTED; + + /* Use configured basic rate set if it is available. If not, + * use defaults that are sane for most cases. */ + if (local->basic_rates[mode->mode]) { + if (rate_list_match(local->basic_rates[mode->mode], + rate->rate)) + rate->flags |= IEEE80211_RATE_BASIC; + } else switch (mode->mode) { + case MODE_IEEE80211A: + if (rate->rate == 60 || rate->rate == 120 || + rate->rate == 240) + rate->flags |= IEEE80211_RATE_BASIC; + break; + case MODE_IEEE80211B: + if (rate->rate == 10 || rate->rate == 20) + rate->flags |= IEEE80211_RATE_BASIC; + break; + case MODE_ATHEROS_TURBO: + if (rate->rate == 120 || rate->rate == 240 || + rate->rate == 480) + rate->flags |= IEEE80211_RATE_BASIC; + break; + case MODE_IEEE80211G: + if (rate->rate == 10 || rate->rate == 20 || + rate->rate == 55 || rate->rate == 110) + rate->flags |= IEEE80211_RATE_BASIC; + break; + } + + /* Set ERP and MANDATORY flags based on phymode */ + switch (mode->mode) { + case MODE_IEEE80211A: + if (rate->rate == 60 || rate->rate == 120 || + rate->rate == 240) + rate->flags |= IEEE80211_RATE_MANDATORY; + break; + case MODE_IEEE80211B: + if (rate->rate == 10) + rate->flags |= IEEE80211_RATE_MANDATORY; + break; + case MODE_ATHEROS_TURBO: + break; + case MODE_IEEE80211G: + if (rate->rate == 10 || rate->rate == 20 || + rate->rate == 55 || rate->rate == 110 || + rate->rate == 60 || rate->rate == 120 || + rate->rate == 240) + rate->flags |= IEEE80211_RATE_MANDATORY; + break; + } + if (ieee80211_is_erp_rate(mode->mode, rate->rate)) + rate->flags |= IEEE80211_RATE_ERP; + } +} + + +static void ieee80211_key_threshold_notify(struct net_device *dev, + struct ieee80211_key *key, + struct sta_info *sta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sk_buff *skb; + struct ieee80211_msg_key_notification *msg; + + /* if no one will get it anyway, don't even allocate it. + * unlikely because this is only relevant for APs + * where the device must be open... */ + if (unlikely(!local->apdev)) + return; + + skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + + sizeof(struct ieee80211_msg_key_notification)); + if (!skb) + return; + + skb_reserve(skb, sizeof(struct ieee80211_frame_info)); + msg = (struct ieee80211_msg_key_notification *) + skb_put(skb, sizeof(struct ieee80211_msg_key_notification)); + msg->tx_rx_count = key->tx_rx_count; + memcpy(msg->ifname, dev->name, IFNAMSIZ); + if (sta) + memcpy(msg->addr, sta->addr, ETH_ALEN); + else + memset(msg->addr, 0xff, ETH_ALEN); + + key->tx_rx_count = 0; + + ieee80211_rx_mgmt(local, skb, NULL, + ieee80211_msg_key_threshold_notification); +} + + +static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len) +{ + u16 fc; + + if (len < 24) + return NULL; + + fc = le16_to_cpu(hdr->frame_control); + + switch (fc & IEEE80211_FCTL_FTYPE) { + case IEEE80211_FTYPE_DATA: + switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { + case IEEE80211_FCTL_TODS: + return hdr->addr1; + case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): + return NULL; + case IEEE80211_FCTL_FROMDS: + return hdr->addr2; + case 0: + return hdr->addr3; + } + break; + case IEEE80211_FTYPE_MGMT: + return hdr->addr3; + case IEEE80211_FTYPE_CTL: + if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL) + return hdr->addr1; + else + return NULL; + } + + return NULL; +} + +int ieee80211_get_hdrlen(u16 fc) +{ + int hdrlen = 24; + + switch (fc & IEEE80211_FCTL_FTYPE) { + case IEEE80211_FTYPE_DATA: + if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) + hdrlen = 30; /* Addr4 */ + /* + * The QoS Control field is two bytes and its presence is + * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to + * hdrlen if that bit is set. + * This works by masking out the bit and shifting it to + * bit position 1 so the result has the value 0 or 2. + */ + hdrlen += (fc & IEEE80211_STYPE_QOS_DATA) + >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1); + break; + case IEEE80211_FTYPE_CTL: + /* + * ACK and CTS are 10 bytes, all others 16. To see how + * to get this condition consider + * subtype mask: 0b0000000011110000 (0x00F0) + * ACK subtype: 0b0000000011010000 (0x00D0) + * CTS subtype: 0b0000000011000000 (0x00C0) + * bits that matter: ^^^ (0x00E0) + * value of those: 0b0000000011000000 (0x00C0) + */ + if ((fc & 0xE0) == 0xC0) + hdrlen = 10; + else + hdrlen = 16; + break; + } + + return hdrlen; +} +EXPORT_SYMBOL(ieee80211_get_hdrlen); + +int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) +{ + const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data; + int hdrlen; + + if (unlikely(skb->len < 10)) + return 0; + hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); + if (unlikely(hdrlen > skb->len)) + return 0; + return hdrlen; +} +EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); + +static int ieee80211_get_radiotap_len(struct sk_buff *skb) +{ + struct ieee80211_radiotap_header *hdr = + (struct ieee80211_radiotap_header *) skb->data; + + return le16_to_cpu(hdr->it_len); +} + +#ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP +static void ieee80211_dump_frame(const char *ifname, const char *title, + const struct sk_buff *skb) +{ + const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc; + int hdrlen; + + printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len); + if (skb->len < 4) { + printk("\n"); + return; + } + + fc = le16_to_cpu(hdr->frame_control); + hdrlen = ieee80211_get_hdrlen(fc); + if (hdrlen > skb->len) + hdrlen = skb->len; + if (hdrlen >= 4) + printk(" FC=0x%04x DUR=0x%04x", + fc, le16_to_cpu(hdr->duration_id)); + if (hdrlen >= 10) + printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1)); + if (hdrlen >= 16) + printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2)); + if (hdrlen >= 24) + printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3)); + if (hdrlen >= 30) + printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4)); + printk("\n"); +} +#else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ +static inline void ieee80211_dump_frame(const char *ifname, const char *title, + struct sk_buff *skb) +{ +} +#endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ + + +static int ieee80211_is_eapol(const struct sk_buff *skb) +{ + const struct ieee80211_hdr *hdr; + u16 fc; + int hdrlen; + + if (unlikely(skb->len < 10)) + return 0; + + hdr = (const struct ieee80211_hdr *) skb->data; + fc = le16_to_cpu(hdr->frame_control); + + if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) + return 0; + + hdrlen = ieee80211_get_hdrlen(fc); + + if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) && + memcmp(skb->data + hdrlen, eapol_header, + sizeof(eapol_header)) == 0)) + return 1; + + return 0; +} + + +static ieee80211_txrx_result +ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx) +{ + struct rate_control_extra extra; + + memset(&extra, 0, sizeof(extra)); + extra.mode = tx->u.tx.mode; + extra.mgmt_data = tx->sdata && + tx->sdata->type == IEEE80211_IF_TYPE_MGMT; + extra.ethertype = tx->ethertype; + + tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb, + &extra); + if (unlikely(extra.probe != NULL)) { + tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE; + tx->u.tx.probe_last_frag = 1; + tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val; + tx->u.tx.rate = extra.probe; + } else { + tx->u.tx.control->alt_retry_rate = -1; + } + if (!tx->u.tx.rate) + return TXRX_DROP; + if (tx->u.tx.mode->mode == MODE_IEEE80211G && + tx->local->cts_protect_erp_frames && tx->fragmented && + extra.nonerp) { + tx->u.tx.last_frag_rate = tx->u.tx.rate; + tx->u.tx.probe_last_frag = extra.probe ? 1 : 0; + + tx->u.tx.rate = extra.nonerp; + tx->u.tx.control->rate = extra.nonerp; + tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE; + } else { + tx->u.tx.last_frag_rate = tx->u.tx.rate; + tx->u.tx.control->rate = tx->u.tx.rate; + } + tx->u.tx.control->tx_rate = tx->u.tx.rate->val; + if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) && + tx->local->short_preamble && + (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) { + tx->u.tx.short_preamble = 1; + tx->u.tx.control->tx_rate = tx->u.tx.rate->val2; + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx) +{ + if (tx->sta) + tx->u.tx.control->key_idx = tx->sta->key_idx_compression; + else + tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID; + + if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) + tx->key = NULL; + else if (tx->sta && tx->sta->key) + tx->key = tx->sta->key; + else if (tx->sdata->default_key) + tx->key = tx->sdata->default_key; + else if (tx->sdata->drop_unencrypted && + !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) { + I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); + return TXRX_DROP; + } else + tx->key = NULL; + + if (tx->key) { + tx->key->tx_rx_count++; + if (unlikely(tx->local->key_tx_rx_threshold && + tx->key->tx_rx_count > + tx->local->key_tx_rx_threshold)) { + ieee80211_key_threshold_notify(tx->dev, tx->key, + tx->sta); + } + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + size_t hdrlen, per_fragm, num_fragm, payload_len, left; + struct sk_buff **frags, *first, *frag; + int i; + u16 seq; + u8 *pos; + int frag_threshold = tx->local->fragmentation_threshold; + + if (!tx->fragmented) + return TXRX_CONTINUE; + + first = tx->skb; + + hdrlen = ieee80211_get_hdrlen(tx->fc); + payload_len = first->len - hdrlen; + per_fragm = frag_threshold - hdrlen - FCS_LEN; + num_fragm = (payload_len + per_fragm - 1) / per_fragm; + + frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); + if (!frags) + goto fail; + + hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); + seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; + pos = first->data + hdrlen + per_fragm; + left = payload_len - per_fragm; + for (i = 0; i < num_fragm - 1; i++) { + struct ieee80211_hdr *fhdr; + size_t copylen; + + if (left <= 0) + goto fail; + + /* reserve enough extra head and tail room for possible + * encryption */ + frag = frags[i] = + dev_alloc_skb(tx->local->hw.extra_tx_headroom + + frag_threshold + + IEEE80211_ENCRYPT_HEADROOM + + IEEE80211_ENCRYPT_TAILROOM); + if (!frag) + goto fail; + /* Make sure that all fragments use the same priority so + * that they end up using the same TX queue */ + frag->priority = first->priority; + skb_reserve(frag, tx->local->hw.extra_tx_headroom + + IEEE80211_ENCRYPT_HEADROOM); + fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); + memcpy(fhdr, first->data, hdrlen); + if (i == num_fragm - 2) + fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); + fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); + copylen = left > per_fragm ? per_fragm : left; + memcpy(skb_put(frag, copylen), pos, copylen); + + pos += copylen; + left -= copylen; + } + skb_trim(first, hdrlen + per_fragm); + + tx->u.tx.num_extra_frag = num_fragm - 1; + tx->u.tx.extra_frag = frags; + + return TXRX_CONTINUE; + + fail: + printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); + if (frags) { + for (i = 0; i < num_fragm - 1; i++) + if (frags[i]) + dev_kfree_skb(frags[i]); + kfree(frags); + } + I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); + return TXRX_DROP; +} + + +static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb) +{ + if (tx->key->force_sw_encrypt) { + if (ieee80211_wep_encrypt(tx->local, skb, tx->key)) + return -1; + } else { + tx->u.tx.control->key_idx = tx->key->hw_key_idx; + if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { + if (ieee80211_wep_add_iv(tx->local, skb, tx->key) == + NULL) + return -1; + } + } + return 0; +} + + +void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + + hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); + if (tx->u.tx.extra_frag) { + struct ieee80211_hdr *fhdr; + int i; + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + fhdr = (struct ieee80211_hdr *) + tx->u.tx.extra_frag[i]->data; + fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); + } + } +} + + +static ieee80211_txrx_result +ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + u16 fc; + + fc = le16_to_cpu(hdr->frame_control); + + if (!tx->key || tx->key->alg != ALG_WEP || + ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && + ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || + (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) + return TXRX_CONTINUE; + + tx->u.tx.control->iv_len = WEP_IV_LEN; + tx->u.tx.control->icv_len = WEP_ICV_LEN; + ieee80211_tx_set_iswep(tx); + + if (wep_encrypt_skb(tx, tx->skb) < 0) { + I802_DEBUG_INC(tx->local->tx_handlers_drop_wep); + return TXRX_DROP; + } + + if (tx->u.tx.extra_frag) { + int i; + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) { + I802_DEBUG_INC(tx->local-> + tx_handlers_drop_wep); + return TXRX_DROP; + } + } + } + + return TXRX_CONTINUE; +} + + +static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, + int rate, int erp, int short_preamble) +{ + int dur; + + /* calculate duration (in microseconds, rounded up to next higher + * integer if it includes a fractional microsecond) to send frame of + * len bytes (does not include FCS) at the given rate. Duration will + * also include SIFS. + * + * rate is in 100 kbps, so divident is multiplied by 10 in the + * DIV_ROUND_UP() operations. + */ + + if (local->hw.conf.phymode == MODE_IEEE80211A || erp || + local->hw.conf.phymode == MODE_ATHEROS_TURBO) { + /* + * OFDM: + * + * N_DBPS = DATARATE x 4 + * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) + * (16 = SIGNAL time, 6 = tail bits) + * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext + * + * T_SYM = 4 usec + * 802.11a - 17.5.2: aSIFSTime = 16 usec + * 802.11g - 19.8.4: aSIFSTime = 10 usec + + * signal ext = 6 usec + */ + /* FIX: Atheros Turbo may have different (shorter) duration? */ + dur = 16; /* SIFS + signal ext */ + dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ + dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ + dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, + 4 * rate); /* T_SYM x N_SYM */ + } else { + /* + * 802.11b or 802.11g with 802.11b compatibility: + * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + + * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. + * + * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 + * aSIFSTime = 10 usec + * aPreambleLength = 144 usec or 72 usec with short preamble + * aPLCPHeaderLength = 48 usec or 24 usec with short preamble + */ + dur = 10; /* aSIFSTime = 10 usec */ + dur += short_preamble ? (72 + 24) : (144 + 48); + + dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); + } + + return dur; +} + + +/* Exported duration function for driver use */ +__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, + size_t frame_len, int rate) +{ + struct ieee80211_local *local = hw_to_local(hw); + u16 dur; + int erp; + + erp = ieee80211_is_erp_rate(hw->conf.phymode, rate); + dur = ieee80211_frame_duration(local, frame_len, rate, + erp, local->short_preamble); + + return cpu_to_le16(dur); +} +EXPORT_SYMBOL(ieee80211_generic_frame_duration); + + +static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr, + int next_frag_len) +{ + int rate, mrate, erp, dur, i; + struct ieee80211_rate *txrate = tx->u.tx.rate; + struct ieee80211_local *local = tx->local; + struct ieee80211_hw_mode *mode = tx->u.tx.mode; + + erp = txrate->flags & IEEE80211_RATE_ERP; + + /* + * data and mgmt (except PS Poll): + * - during CFP: 32768 + * - during contention period: + * if addr1 is group address: 0 + * if more fragments = 0 and addr1 is individual address: time to + * transmit one ACK plus SIFS + * if more fragments = 1 and addr1 is individual address: time to + * transmit next fragment plus 2 x ACK plus 3 x SIFS + * + * IEEE 802.11, 9.6: + * - control response frame (CTS or ACK) shall be transmitted using the + * same rate as the immediately previous frame in the frame exchange + * sequence, if this rate belongs to the PHY mandatory rates, or else + * at the highest possible rate belonging to the PHY rates in the + * BSSBasicRateSet + */ + + if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) { + /* TODO: These control frames are not currently sent by + * 80211.o, but should they be implemented, this function + * needs to be updated to support duration field calculation. + * + * RTS: time needed to transmit pending data/mgmt frame plus + * one CTS frame plus one ACK frame plus 3 x SIFS + * CTS: duration of immediately previous RTS minus time + * required to transmit CTS and its SIFS + * ACK: 0 if immediately previous directed data/mgmt had + * more=0, with more=1 duration in ACK frame is duration + * from previous frame minus time needed to transmit ACK + * and its SIFS + * PS Poll: BIT(15) | BIT(14) | aid + */ + return 0; + } + + /* data/mgmt */ + if (0 /* FIX: data/mgmt during CFP */) + return 32768; + + if (group_addr) /* Group address as the destination - no ACK */ + return 0; + + /* Individual destination address: + * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) + * CTS and ACK frames shall be transmitted using the highest rate in + * basic rate set that is less than or equal to the rate of the + * immediately previous frame and that is using the same modulation + * (CCK or OFDM). If no basic rate set matches with these requirements, + * the highest mandatory rate of the PHY that is less than or equal to + * the rate of the previous frame is used. + * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps + */ + rate = -1; + mrate = 10; /* use 1 Mbps if everything fails */ + for (i = 0; i < mode->num_rates; i++) { + struct ieee80211_rate *r = &mode->rates[i]; + if (r->rate > txrate->rate) + break; + + if (IEEE80211_RATE_MODULATION(txrate->flags) != + IEEE80211_RATE_MODULATION(r->flags)) + continue; + + if (r->flags & IEEE80211_RATE_BASIC) + rate = r->rate; + else if (r->flags & IEEE80211_RATE_MANDATORY) + mrate = r->rate; + } + if (rate == -1) { + /* No matching basic rate found; use highest suitable mandatory + * PHY rate */ + rate = mrate; + } + + /* Time needed to transmit ACK + * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up + * to closest integer */ + + dur = ieee80211_frame_duration(local, 10, rate, erp, + local->short_preamble); + + if (next_frag_len) { + /* Frame is fragmented: duration increases with time needed to + * transmit next fragment plus ACK and 2 x SIFS. */ + dur *= 2; /* ACK + SIFS */ + /* next fragment */ + dur += ieee80211_frame_duration(local, next_frag_len, + txrate->rate, erp, + local->short_preamble); + } + + return dur; +} + + +static ieee80211_txrx_result +ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + u16 dur; + struct ieee80211_tx_control *control = tx->u.tx.control; + struct ieee80211_hw_mode *mode = tx->u.tx.mode; + + if (!is_multicast_ether_addr(hdr->addr1)) { + if (tx->skb->len + FCS_LEN > tx->local->rts_threshold && + tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) { + control->flags |= IEEE80211_TXCTL_USE_RTS_CTS; + control->retry_limit = + tx->local->long_retry_limit; + } else { + control->retry_limit = + tx->local->short_retry_limit; + } + } else { + control->retry_limit = 1; + } + + if (tx->fragmented) { + /* Do not use multiple retry rates when sending fragmented + * frames. + * TODO: The last fragment could still use multiple retry + * rates. */ + control->alt_retry_rate = -1; + } + + /* Use CTS protection for unicast frames sent using extended rates if + * there are associated non-ERP stations and RTS/CTS is not configured + * for the frame. */ + if (mode->mode == MODE_IEEE80211G && + (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) && + tx->u.tx.unicast && + tx->local->cts_protect_erp_frames && + !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS)) + control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT; + + /* Setup duration field for the first fragment of the frame. Duration + * for remaining fragments will be updated when they are being sent + * to low-level driver in ieee80211_tx(). */ + dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1), + tx->fragmented ? tx->u.tx.extra_frag[0]->len : + 0); + hdr->duration_id = cpu_to_le16(dur); + + if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) || + (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { + struct ieee80211_rate *rate; + + /* Do not use multiple retry rates when using RTS/CTS */ + control->alt_retry_rate = -1; + + /* Use min(data rate, max base rate) as CTS/RTS rate */ + rate = tx->u.tx.rate; + while (rate > mode->rates && + !(rate->flags & IEEE80211_RATE_BASIC)) + rate--; + + control->rts_cts_rate = rate->val; + control->rts_rate = rate; + } + + if (tx->sta) { + tx->sta->tx_packets++; + tx->sta->tx_fragments++; + tx->sta->tx_bytes += tx->skb->len; + if (tx->u.tx.extra_frag) { + int i; + tx->sta->tx_fragments += tx->u.tx.num_extra_frag; + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + tx->sta->tx_bytes += + tx->u.tx.extra_frag[i]->len; + } + } + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx) +{ +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + struct sk_buff *skb = tx->skb; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + u32 sta_flags; + + if (unlikely(tx->local->sta_scanning != 0) && + ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || + (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ)) + return TXRX_DROP; + + if (tx->u.tx.ps_buffered) + return TXRX_CONTINUE; + + sta_flags = tx->sta ? tx->sta->flags : 0; + + if (likely(tx->u.tx.unicast)) { + if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && + tx->sdata->type != IEEE80211_IF_TYPE_IBSS && + (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: dropped data frame to not " + "associated station " MAC_FMT "\n", + tx->dev->name, MAC_ARG(hdr->addr1)); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); + return TXRX_DROP; + } + } else { + if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && + tx->local->num_sta == 0 && + !tx->local->allow_broadcast_always && + tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) { + /* + * No associated STAs - no need to send multicast + * frames. + */ + return TXRX_DROP; + } + return TXRX_CONTINUE; + } + + if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x && + !(sta_flags & WLAN_STA_AUTHORIZED))) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT + " (unauthorized port)\n", tx->dev->name, + MAC_ARG(hdr->addr1)); +#endif + I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port); + return TXRX_DROP; + } + + return TXRX_CONTINUE; +} + +static ieee80211_txrx_result +ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; + + if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24) + ieee80211_include_sequence(tx->sdata, hdr); + + return TXRX_CONTINUE; +} + +/* This function is called whenever the AP is about to exceed the maximum limit + * of buffered frames for power saving STAs. This situation should not really + * happen often during normal operation, so dropping the oldest buffered packet + * from each queue should be OK to make some room for new frames. */ +static void purge_old_ps_buffers(struct ieee80211_local *local) +{ + int total = 0, purged = 0; + struct sk_buff *skb; + struct ieee80211_sub_if_data *sdata; + struct sta_info *sta; + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + struct ieee80211_if_ap *ap; + if (sdata->dev == local->mdev || + sdata->type != IEEE80211_IF_TYPE_AP) + continue; + ap = &sdata->u.ap; + skb = skb_dequeue(&ap->ps_bc_buf); + if (skb) { + purged++; + dev_kfree_skb(skb); + } + total += skb_queue_len(&ap->ps_bc_buf); + } + read_unlock(&local->sub_if_lock); + + spin_lock_bh(&local->sta_lock); + list_for_each_entry(sta, &local->sta_list, list) { + skb = skb_dequeue(&sta->ps_tx_buf); + if (skb) { + purged++; + dev_kfree_skb(skb); + } + total += skb_queue_len(&sta->ps_tx_buf); + } + spin_unlock_bh(&local->sta_lock); + + local->total_ps_buffered = total; + printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n", + local->mdev->name, purged); +} + + +static inline ieee80211_txrx_result +ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx) +{ + /* broadcast/multicast frame */ + /* If any of the associated stations is in power save mode, + * the frame is buffered to be sent after DTIM beacon frame */ + if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) && + tx->sdata->type != IEEE80211_IF_TYPE_WDS && + tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) && + !(tx->fc & IEEE80211_FCTL_ORDER)) { + if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) + purge_old_ps_buffers(tx->local); + if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= + AP_MAX_BC_BUFFER) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: BC TX buffer full - " + "dropping the oldest frame\n", + tx->dev->name); + } + dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); + } else + tx->local->total_ps_buffered++; + skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); + return TXRX_QUEUED; + } + + return TXRX_CONTINUE; +} + + +static inline ieee80211_txrx_result +ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx) +{ + struct sta_info *sta = tx->sta; + + if (unlikely(!sta || + ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && + (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP))) + return TXRX_CONTINUE; + + if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) { + struct ieee80211_tx_packet_data *pkt_data; +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries " + "before %d)\n", + MAC_ARG(sta->addr), sta->aid, + skb_queue_len(&sta->ps_tx_buf)); +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + sta->flags |= WLAN_STA_TIM; + if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) + purge_old_ps_buffers(tx->local); + if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { + struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: STA " MAC_FMT " TX " + "buffer full - dropping oldest frame\n", + tx->dev->name, MAC_ARG(sta->addr)); + } + dev_kfree_skb(old); + } else + tx->local->total_ps_buffered++; + /* Queue frame to be sent after STA sends an PS Poll frame */ + if (skb_queue_empty(&sta->ps_tx_buf)) { + if (tx->local->ops->set_tim) + tx->local->ops->set_tim(local_to_hw(tx->local), + sta->aid, 1); + if (tx->sdata->bss) + bss_tim_set(tx->local, tx->sdata->bss, sta->aid); + } + pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb; + pkt_data->jiffies = jiffies; + skb_queue_tail(&sta->ps_tx_buf, tx->skb); + return TXRX_QUEUED; + } +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + else if (unlikely(sta->flags & WLAN_STA_PS)) { + printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll " + "set -> send frame\n", tx->dev->name, + MAC_ARG(sta->addr)); + } +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + sta->pspoll = 0; + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx) +{ + if (unlikely(tx->u.tx.ps_buffered)) + return TXRX_CONTINUE; + + if (tx->u.tx.unicast) + return ieee80211_tx_h_unicast_ps_buf(tx); + else + return ieee80211_tx_h_multicast_ps_buf(tx); +} + + +static void inline +__ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, + struct sk_buff *skb, + struct net_device *dev, + struct ieee80211_tx_control *control) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + int hdrlen; + + memset(tx, 0, sizeof(*tx)); + tx->skb = skb; + tx->dev = dev; /* use original interface */ + tx->local = local; + tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev); + tx->sta = sta_info_get(local, hdr->addr1); + tx->fc = le16_to_cpu(hdr->frame_control); + control->power_level = local->hw.conf.power_level; + tx->u.tx.control = control; + tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1); + if (is_multicast_ether_addr(hdr->addr1)) + control->flags |= IEEE80211_TXCTL_NO_ACK; + else + control->flags &= ~IEEE80211_TXCTL_NO_ACK; + tx->fragmented = local->fragmentation_threshold < + IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast && + skb->len + FCS_LEN > local->fragmentation_threshold && + (!local->ops->set_frag_threshold); + if (!tx->sta) + control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; + else if (tx->sta->clear_dst_mask) { + control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; + tx->sta->clear_dst_mask = 0; + } + control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; + if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta) + control->antenna_sel_tx = tx->sta->antenna_sel_tx; + hdrlen = ieee80211_get_hdrlen(tx->fc); + if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { + u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; + tx->ethertype = (pos[0] << 8) | pos[1]; + } + control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT; + +} + +static int inline is_ieee80211_device(struct net_device *dev, + struct net_device *master) +{ + return (wdev_priv(dev->ieee80211_ptr) == + wdev_priv(master->ieee80211_ptr)); +} + +/* Device in tx->dev has a reference added; use dev_put(tx->dev) when + * finished with it. */ +static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, + struct sk_buff *skb, + struct net_device *mdev, + struct ieee80211_tx_control *control) +{ + struct ieee80211_tx_packet_data *pkt_data; + struct net_device *dev; + + pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; + dev = dev_get_by_index(pkt_data->ifindex); + if (unlikely(dev && !is_ieee80211_device(dev, mdev))) { + dev_put(dev); + dev = NULL; + } + if (unlikely(!dev)) + return -ENODEV; + __ieee80211_tx_prepare(tx, skb, dev, control); + return 0; +} + +static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local, + int queue) +{ + return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); +} + +static inline int __ieee80211_queue_pending(const struct ieee80211_local *local, + int queue) +{ + return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]); +} + +#define IEEE80211_TX_OK 0 +#define IEEE80211_TX_AGAIN 1 +#define IEEE80211_TX_FRAG_AGAIN 2 + +static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_txrx_data *tx) +{ + struct ieee80211_tx_control *control = tx->u.tx.control; + int ret, i; + + if (!ieee80211_qdisc_installed(local->mdev) && + __ieee80211_queue_stopped(local, 0)) { + netif_stop_queue(local->mdev); + return IEEE80211_TX_AGAIN; + } + if (skb) { + ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb); + ret = local->ops->tx(local_to_hw(local), skb, control); + if (ret) + return IEEE80211_TX_AGAIN; + local->mdev->trans_start = jiffies; + ieee80211_led_tx(local, 1); + } + if (tx->u.tx.extra_frag) { + control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | + IEEE80211_TXCTL_USE_CTS_PROTECT | + IEEE80211_TXCTL_CLEAR_DST_MASK | + IEEE80211_TXCTL_FIRST_FRAGMENT); + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + if (!tx->u.tx.extra_frag[i]) + continue; + if (__ieee80211_queue_stopped(local, control->queue)) + return IEEE80211_TX_FRAG_AGAIN; + if (i == tx->u.tx.num_extra_frag) { + control->tx_rate = tx->u.tx.last_frag_hwrate; + control->rate = tx->u.tx.last_frag_rate; + if (tx->u.tx.probe_last_frag) + control->flags |= + IEEE80211_TXCTL_RATE_CTRL_PROBE; + else + control->flags &= + ~IEEE80211_TXCTL_RATE_CTRL_PROBE; + } + + ieee80211_dump_frame(local->mdev->name, + "TX to low-level driver", + tx->u.tx.extra_frag[i]); + ret = local->ops->tx(local_to_hw(local), + tx->u.tx.extra_frag[i], + control); + if (ret) + return IEEE80211_TX_FRAG_AGAIN; + local->mdev->trans_start = jiffies; + ieee80211_led_tx(local, 1); + tx->u.tx.extra_frag[i] = NULL; + } + kfree(tx->u.tx.extra_frag); + tx->u.tx.extra_frag = NULL; + } + return IEEE80211_TX_OK; +} + +static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb, + struct ieee80211_tx_control *control, int mgmt) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta; + ieee80211_tx_handler *handler; + struct ieee80211_txrx_data tx; + ieee80211_txrx_result res = TXRX_DROP; + int ret, i; + + WARN_ON(__ieee80211_queue_pending(local, control->queue)); + + if (unlikely(skb->len < 10)) { + dev_kfree_skb(skb); + return 0; + } + + __ieee80211_tx_prepare(&tx, skb, dev, control); + sta = tx.sta; + tx.u.tx.mgmt_interface = mgmt; + tx.u.tx.mode = local->hw.conf.mode; + + for (handler = local->tx_handlers; *handler != NULL; handler++) { + res = (*handler)(&tx); + if (res != TXRX_CONTINUE) + break; + } + + skb = tx.skb; /* handlers are allowed to change skb */ + + if (sta) + sta_info_put(sta); + + if (unlikely(res == TXRX_DROP)) { + I802_DEBUG_INC(local->tx_handlers_drop); + goto drop; + } + + if (unlikely(res == TXRX_QUEUED)) { + I802_DEBUG_INC(local->tx_handlers_queued); + return 0; + } + + if (tx.u.tx.extra_frag) { + for (i = 0; i < tx.u.tx.num_extra_frag; i++) { + int next_len, dur; + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *) + tx.u.tx.extra_frag[i]->data; + + if (i + 1 < tx.u.tx.num_extra_frag) { + next_len = tx.u.tx.extra_frag[i + 1]->len; + } else { + next_len = 0; + tx.u.tx.rate = tx.u.tx.last_frag_rate; + tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val; + } + dur = ieee80211_duration(&tx, 0, next_len); + hdr->duration_id = cpu_to_le16(dur); + } + } + +retry: + ret = __ieee80211_tx(local, skb, &tx); + if (ret) { + struct ieee80211_tx_stored_packet *store = + &local->pending_packet[control->queue]; + + if (ret == IEEE80211_TX_FRAG_AGAIN) + skb = NULL; + set_bit(IEEE80211_LINK_STATE_PENDING, + &local->state[control->queue]); + smp_mb(); + /* When the driver gets out of buffers during sending of + * fragments and calls ieee80211_stop_queue, there is + * a small window between IEEE80211_LINK_STATE_XOFF and + * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer + * gets available in that window (i.e. driver calls + * ieee80211_wake_queue), we would end up with ieee80211_tx + * called with IEEE80211_LINK_STATE_PENDING. Prevent this by + * continuing transmitting here when that situation is + * possible to have happened. */ + if (!__ieee80211_queue_stopped(local, control->queue)) { + clear_bit(IEEE80211_LINK_STATE_PENDING, + &local->state[control->queue]); + goto retry; + } + memcpy(&store->control, control, + sizeof(struct ieee80211_tx_control)); + store->skb = skb; + store->extra_frag = tx.u.tx.extra_frag; + store->num_extra_frag = tx.u.tx.num_extra_frag; + store->last_frag_hwrate = tx.u.tx.last_frag_hwrate; + store->last_frag_rate = tx.u.tx.last_frag_rate; + store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag; + } + return 0; + + drop: + if (skb) + dev_kfree_skb(skb); + for (i = 0; i < tx.u.tx.num_extra_frag; i++) + if (tx.u.tx.extra_frag[i]) + dev_kfree_skb(tx.u.tx.extra_frag[i]); + kfree(tx.u.tx.extra_frag); + return 0; +} + +static void ieee80211_tx_pending(unsigned long data) +{ + struct ieee80211_local *local = (struct ieee80211_local *)data; + struct net_device *dev = local->mdev; + struct ieee80211_tx_stored_packet *store; + struct ieee80211_txrx_data tx; + int i, ret, reschedule = 0; + + netif_tx_lock_bh(dev); + for (i = 0; i < local->hw.queues; i++) { + if (__ieee80211_queue_stopped(local, i)) + continue; + if (!__ieee80211_queue_pending(local, i)) { + reschedule = 1; + continue; + } + store = &local->pending_packet[i]; + tx.u.tx.control = &store->control; + tx.u.tx.extra_frag = store->extra_frag; + tx.u.tx.num_extra_frag = store->num_extra_frag; + tx.u.tx.last_frag_hwrate = store->last_frag_hwrate; + tx.u.tx.last_frag_rate = store->last_frag_rate; + tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe; + ret = __ieee80211_tx(local, store->skb, &tx); + if (ret) { + if (ret == IEEE80211_TX_FRAG_AGAIN) + store->skb = NULL; + } else { + clear_bit(IEEE80211_LINK_STATE_PENDING, + &local->state[i]); + reschedule = 1; + } + } + netif_tx_unlock_bh(dev); + if (reschedule) { + if (!ieee80211_qdisc_installed(dev)) { + if (!__ieee80211_queue_stopped(local, 0)) + netif_wake_queue(dev); + } else + netif_schedule(dev); + } +} + +static void ieee80211_clear_tx_pending(struct ieee80211_local *local) +{ + int i, j; + struct ieee80211_tx_stored_packet *store; + + for (i = 0; i < local->hw.queues; i++) { + if (!__ieee80211_queue_pending(local, i)) + continue; + store = &local->pending_packet[i]; + kfree_skb(store->skb); + for (j = 0; j < store->num_extra_frag; j++) + kfree_skb(store->extra_frag[j]); + kfree(store->extra_frag); + clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]); + } +} + +static int ieee80211_master_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ieee80211_tx_control control; + struct ieee80211_tx_packet_data *pkt_data; + struct net_device *odev = NULL; + struct ieee80211_sub_if_data *osdata; + int headroom; + int ret; + + /* + * copy control out of the skb so other people can use skb->cb + */ + pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; + memset(&control, 0, sizeof(struct ieee80211_tx_control)); + + if (pkt_data->ifindex) + odev = dev_get_by_index(pkt_data->ifindex); + if (unlikely(odev && !is_ieee80211_device(odev, dev))) { + dev_put(odev); + odev = NULL; + } + if (unlikely(!odev)) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: Discarded packet with nonexistent " + "originating device\n", dev->name); +#endif + dev_kfree_skb(skb); + return 0; + } + osdata = IEEE80211_DEV_TO_SUB_IF(odev); + + headroom = osdata->local->hw.extra_tx_headroom + + IEEE80211_ENCRYPT_HEADROOM; + if (skb_headroom(skb) < headroom) { + if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { + dev_kfree_skb(skb); + return 0; + } + } + + control.ifindex = odev->ifindex; + control.type = osdata->type; + if (pkt_data->req_tx_status) + control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS; + if (pkt_data->do_not_encrypt) + control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT; + if (pkt_data->requeue) + control.flags |= IEEE80211_TXCTL_REQUEUE; + control.queue = pkt_data->queue; + + ret = ieee80211_tx(odev, skb, &control, + control.type == IEEE80211_IF_TYPE_MGMT); + dev_put(odev); + + return ret; +} + + +/** + * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type + * subinterfaces (wlan#, WDS, and VLAN interfaces) + * @skb: packet to be sent + * @dev: incoming interface + * + * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will + * not be freed, and caller is responsible for either retrying later or freeing + * skb). + * + * This function takes in an Ethernet header and encapsulates it with suitable + * IEEE 802.11 header based on which interface the packet is coming in. The + * encapsulated packet will then be passed to master interface, wlan#.11, for + * transmission (through low-level driver). + */ +static int ieee80211_subif_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_tx_packet_data *pkt_data; + struct ieee80211_sub_if_data *sdata; + int ret = 1, head_need; + u16 ethertype, hdrlen, fc; + struct ieee80211_hdr hdr; + const u8 *encaps_data; + int encaps_len, skip_header_bytes; + int nh_pos, h_pos, no_encrypt = 0; + struct sta_info *sta; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (unlikely(skb->len < ETH_HLEN)) { + printk(KERN_DEBUG "%s: short skb (len=%d)\n", + dev->name, skb->len); + ret = 0; + goto fail; + } + + nh_pos = skb_network_header(skb) - skb->data; + h_pos = skb_transport_header(skb) - skb->data; + + /* convert Ethernet header to proper 802.11 header (based on + * operation mode) */ + ethertype = (skb->data[12] << 8) | skb->data[13]; + /* TODO: handling for 802.1x authorized/unauthorized port */ + fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; + + if (likely(sdata->type == IEEE80211_IF_TYPE_AP || + sdata->type == IEEE80211_IF_TYPE_VLAN)) { + fc |= IEEE80211_FCTL_FROMDS; + /* DA BSSID SA */ + memcpy(hdr.addr1, skb->data, ETH_ALEN); + memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); + memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); + hdrlen = 24; + } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { + fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; + /* RA TA DA SA */ + memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); + memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); + memcpy(hdr.addr3, skb->data, ETH_ALEN); + memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); + hdrlen = 30; + } else if (sdata->type == IEEE80211_IF_TYPE_STA) { + fc |= IEEE80211_FCTL_TODS; + /* BSSID SA DA */ + memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN); + memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); + memcpy(hdr.addr3, skb->data, ETH_ALEN); + hdrlen = 24; + } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) { + /* DA SA BSSID */ + memcpy(hdr.addr1, skb->data, ETH_ALEN); + memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); + memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN); + hdrlen = 24; + } else { + ret = 0; + goto fail; + } + + /* receiver is QoS enabled, use a QoS type frame */ + sta = sta_info_get(local, hdr.addr1); + if (sta) { + if (sta->flags & WLAN_STA_WME) { + fc |= IEEE80211_STYPE_QOS_DATA; + hdrlen += 2; + } + sta_info_put(sta); + } + + hdr.frame_control = cpu_to_le16(fc); + hdr.duration_id = 0; + hdr.seq_ctrl = 0; + + skip_header_bytes = ETH_HLEN; + if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { + encaps_data = bridge_tunnel_header; + encaps_len = sizeof(bridge_tunnel_header); + skip_header_bytes -= 2; + } else if (ethertype >= 0x600) { + encaps_data = rfc1042_header; + encaps_len = sizeof(rfc1042_header); + skip_header_bytes -= 2; + } else { + encaps_data = NULL; + encaps_len = 0; + } + + skb_pull(skb, skip_header_bytes); + nh_pos -= skip_header_bytes; + h_pos -= skip_header_bytes; + + /* TODO: implement support for fragments so that there is no need to + * reallocate and copy payload; it might be enough to support one + * extra fragment that would be copied in the beginning of the frame + * data.. anyway, it would be nice to include this into skb structure + * somehow + * + * There are few options for this: + * use skb->cb as an extra space for 802.11 header + * allocate new buffer if not enough headroom + * make sure that there is enough headroom in every skb by increasing + * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and + * alloc_skb() (net/core/skbuff.c) + */ + head_need = hdrlen + encaps_len + local->hw.extra_tx_headroom; + head_need -= skb_headroom(skb); + + /* We are going to modify skb data, so make a copy of it if happens to + * be cloned. This could happen, e.g., with Linux bridge code passing + * us broadcast frames. */ + + if (head_need > 0 || skb_cloned(skb)) { +#if 0 + printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes " + "of headroom\n", dev->name, head_need); +#endif + + if (skb_cloned(skb)) + I802_DEBUG_INC(local->tx_expand_skb_head_cloned); + else + I802_DEBUG_INC(local->tx_expand_skb_head); + /* Since we have to reallocate the buffer, make sure that there + * is enough room for possible WEP IV/ICV and TKIP (8 bytes + * before payload and 12 after). */ + if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8), + 12, GFP_ATOMIC)) { + printk(KERN_DEBUG "%s: failed to reallocate TX buffer" + "\n", dev->name); + goto fail; + } + } + + if (encaps_data) { + memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); + nh_pos += encaps_len; + h_pos += encaps_len; + } + memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); + nh_pos += hdrlen; + h_pos += hdrlen; + + pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; + memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); + pkt_data->ifindex = sdata->dev->ifindex; + pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); + pkt_data->do_not_encrypt = no_encrypt; + + skb->dev = local->mdev; + sdata->stats.tx_packets++; + sdata->stats.tx_bytes += skb->len; + + /* Update skb pointers to various headers since this modified frame + * is going to go through Linux networking code that may potentially + * need things like pointer to IP header. */ + skb_set_mac_header(skb, 0); + skb_set_network_header(skb, nh_pos); + skb_set_transport_header(skb, h_pos); + + dev->trans_start = jiffies; + dev_queue_xmit(skb); + + return 0; + + fail: + if (!ret) + dev_kfree_skb(skb); + + return ret; +} + + +/* + * This is the transmit routine for the 802.11 type interfaces + * called by upper layers of the linux networking + * stack when it has a frame to transmit + */ +static int +ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_tx_packet_data *pkt_data; + struct ieee80211_hdr *hdr; + u16 fc; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (skb->len < 10) { + dev_kfree_skb(skb); + return 0; + } + + if (skb_headroom(skb) < sdata->local->hw.extra_tx_headroom) { + if (pskb_expand_head(skb, + sdata->local->hw.extra_tx_headroom, 0, GFP_ATOMIC)) { + dev_kfree_skb(skb); + return 0; + } + } + + hdr = (struct ieee80211_hdr *) skb->data; + fc = le16_to_cpu(hdr->frame_control); + + pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; + memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); + pkt_data->ifindex = sdata->dev->ifindex; + pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); + + skb->priority = 20; /* use hardcoded priority for mgmt TX queue */ + skb->dev = sdata->local->mdev; + + /* + * We're using the protocol field of the the frame control header + * to request TX callback for hostapd. BIT(1) is checked. + */ + if ((fc & BIT(1)) == BIT(1)) { + pkt_data->req_tx_status = 1; + fc &= ~BIT(1); + hdr->frame_control = cpu_to_le16(fc); + } + + pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED); + + sdata->stats.tx_packets++; + sdata->stats.tx_bytes += skb->len; + + dev_queue_xmit(skb); + + return 0; +} + + +static void ieee80211_beacon_add_tim(struct ieee80211_local *local, + struct ieee80211_if_ap *bss, + struct sk_buff *skb) +{ + u8 *pos, *tim; + int aid0 = 0; + int i, have_bits = 0, n1, n2; + + /* Generate bitmap for TIM only if there are any STAs in power save + * mode. */ + spin_lock_bh(&local->sta_lock); + if (atomic_read(&bss->num_sta_ps) > 0) + /* in the hope that this is faster than + * checking byte-for-byte */ + have_bits = !bitmap_empty((unsigned long*)bss->tim, + IEEE80211_MAX_AID+1); + + if (bss->dtim_count == 0) + bss->dtim_count = bss->dtim_period - 1; + else + bss->dtim_count--; + + tim = pos = (u8 *) skb_put(skb, 6); + *pos++ = WLAN_EID_TIM; + *pos++ = 4; + *pos++ = bss->dtim_count; + *pos++ = bss->dtim_period; + + if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) + aid0 = 1; + + if (have_bits) { + /* Find largest even number N1 so that bits numbered 1 through + * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits + * (N2 + 1) x 8 through 2007 are 0. */ + n1 = 0; + for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { + if (bss->tim[i]) { + n1 = i & 0xfe; + break; + } + } + n2 = n1; + for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { + if (bss->tim[i]) { + n2 = i; + break; + } + } + + /* Bitmap control */ + *pos++ = n1 | aid0; + /* Part Virt Bitmap */ + memcpy(pos, bss->tim + n1, n2 - n1 + 1); + + tim[1] = n2 - n1 + 4; + skb_put(skb, n2 - n1); + } else { + *pos++ = aid0; /* Bitmap control */ + *pos++ = 0; /* Part Virt Bitmap */ + } + spin_unlock_bh(&local->sta_lock); +} + + +struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id, + struct ieee80211_tx_control *control) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct sk_buff *skb; + struct net_device *bdev; + struct ieee80211_sub_if_data *sdata = NULL; + struct ieee80211_if_ap *ap = NULL; + struct ieee80211_rate *rate; + struct rate_control_extra extra; + u8 *b_head, *b_tail; + int bh_len, bt_len; + + bdev = dev_get_by_index(if_id); + if (bdev) { + sdata = IEEE80211_DEV_TO_SUB_IF(bdev); + ap = &sdata->u.ap; + dev_put(bdev); + } + + if (!ap || sdata->type != IEEE80211_IF_TYPE_AP || + !ap->beacon_head) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + if (net_ratelimit()) + printk(KERN_DEBUG "no beacon data avail for idx=%d " + "(%s)\n", if_id, bdev ? bdev->name : "N/A"); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + return NULL; + } + + /* Assume we are generating the normal beacon locally */ + b_head = ap->beacon_head; + b_tail = ap->beacon_tail; + bh_len = ap->beacon_head_len; + bt_len = ap->beacon_tail_len; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + + bh_len + bt_len + 256 /* maximum TIM len */); + if (!skb) + return NULL; + + skb_reserve(skb, local->hw.extra_tx_headroom); + memcpy(skb_put(skb, bh_len), b_head, bh_len); + + ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data); + + ieee80211_beacon_add_tim(local, ap, skb); + + if (b_tail) { + memcpy(skb_put(skb, bt_len), b_tail, bt_len); + } + + if (control) { + memset(&extra, 0, sizeof(extra)); + extra.mode = local->oper_hw_mode; + + rate = rate_control_get_rate(local, local->mdev, skb, &extra); + if (!rate) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate " + "found\n", local->mdev->name); + } + dev_kfree_skb(skb); + return NULL; + } + + control->tx_rate = (local->short_preamble && + (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? + rate->val2 : rate->val; + control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; + control->power_level = local->hw.conf.power_level; + control->flags |= IEEE80211_TXCTL_NO_ACK; + control->retry_limit = 1; + control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; + } + + ap->num_beacons++; + return skb; +} +EXPORT_SYMBOL(ieee80211_beacon_get); + +__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, + size_t frame_len, + const struct ieee80211_tx_control *frame_txctl) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_rate *rate; + int short_preamble = local->short_preamble; + int erp; + u16 dur; + + rate = frame_txctl->rts_rate; + erp = !!(rate->flags & IEEE80211_RATE_ERP); + + /* CTS duration */ + dur = ieee80211_frame_duration(local, 10, rate->rate, + erp, short_preamble); + /* Data frame duration */ + dur += ieee80211_frame_duration(local, frame_len, rate->rate, + erp, short_preamble); + /* ACK duration */ + dur += ieee80211_frame_duration(local, 10, rate->rate, + erp, short_preamble); + + return cpu_to_le16(dur); +} +EXPORT_SYMBOL(ieee80211_rts_duration); + + +__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, + size_t frame_len, + const struct ieee80211_tx_control *frame_txctl) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_rate *rate; + int short_preamble = local->short_preamble; + int erp; + u16 dur; + + rate = frame_txctl->rts_rate; + erp = !!(rate->flags & IEEE80211_RATE_ERP); + + /* Data frame duration */ + dur = ieee80211_frame_duration(local, frame_len, rate->rate, + erp, short_preamble); + if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { + /* ACK duration */ + dur += ieee80211_frame_duration(local, 10, rate->rate, + erp, short_preamble); + } + + return cpu_to_le16(dur); +} +EXPORT_SYMBOL(ieee80211_ctstoself_duration); + +void ieee80211_rts_get(struct ieee80211_hw *hw, + const void *frame, size_t frame_len, + const struct ieee80211_tx_control *frame_txctl, + struct ieee80211_rts *rts) +{ + const struct ieee80211_hdr *hdr = frame; + u16 fctl; + + fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS; + rts->frame_control = cpu_to_le16(fctl); + rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl); + memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); + memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); +} +EXPORT_SYMBOL(ieee80211_rts_get); + +void ieee80211_ctstoself_get(struct ieee80211_hw *hw, + const void *frame, size_t frame_len, + const struct ieee80211_tx_control *frame_txctl, + struct ieee80211_cts *cts) +{ + const struct ieee80211_hdr *hdr = frame; + u16 fctl; + + fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS; + cts->frame_control = cpu_to_le16(fctl); + cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl); + memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); +} +EXPORT_SYMBOL(ieee80211_ctstoself_get); + +struct sk_buff * +ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, + struct ieee80211_tx_control *control) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct sk_buff *skb; + struct sta_info *sta; + ieee80211_tx_handler *handler; + struct ieee80211_txrx_data tx; + ieee80211_txrx_result res = TXRX_DROP; + struct net_device *bdev; + struct ieee80211_sub_if_data *sdata; + struct ieee80211_if_ap *bss = NULL; + + bdev = dev_get_by_index(if_id); + if (bdev) { + sdata = IEEE80211_DEV_TO_SUB_IF(bdev); + bss = &sdata->u.ap; + dev_put(bdev); + } + if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head) + return NULL; + + if (bss->dtim_count != 0) + return NULL; /* send buffered bc/mc only after DTIM beacon */ + memset(control, 0, sizeof(*control)); + while (1) { + skb = skb_dequeue(&bss->ps_bc_buf); + if (!skb) + return NULL; + local->total_ps_buffered--; + + if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *) skb->data; + /* more buffered multicast/broadcast frames ==> set + * MoreData flag in IEEE 802.11 header to inform PS + * STAs */ + hdr->frame_control |= + cpu_to_le16(IEEE80211_FCTL_MOREDATA); + } + + if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0) + break; + dev_kfree_skb_any(skb); + } + sta = tx.sta; + tx.u.tx.ps_buffered = 1; + + for (handler = local->tx_handlers; *handler != NULL; handler++) { + res = (*handler)(&tx); + if (res == TXRX_DROP || res == TXRX_QUEUED) + break; + } + dev_put(tx.dev); + skb = tx.skb; /* handlers are allowed to change skb */ + + if (res == TXRX_DROP) { + I802_DEBUG_INC(local->tx_handlers_drop); + dev_kfree_skb(skb); + skb = NULL; + } else if (res == TXRX_QUEUED) { + I802_DEBUG_INC(local->tx_handlers_queued); + skb = NULL; + } + + if (sta) + sta_info_put(sta); + + return skb; +} +EXPORT_SYMBOL(ieee80211_get_buffered_bc); + +static int __ieee80211_if_config(struct net_device *dev, + struct sk_buff *beacon, + struct ieee80211_tx_control *control) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_if_conf conf; + static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + + if (!local->ops->config_interface || !netif_running(dev)) + return 0; + + memset(&conf, 0, sizeof(conf)); + conf.type = sdata->type; + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + if (local->sta_scanning && + local->scan_dev == dev) + conf.bssid = scan_bssid; + else + conf.bssid = sdata->u.sta.bssid; + conf.ssid = sdata->u.sta.ssid; + conf.ssid_len = sdata->u.sta.ssid_len; + conf.generic_elem = sdata->u.sta.extra_ie; + conf.generic_elem_len = sdata->u.sta.extra_ie_len; + } else if (sdata->type == IEEE80211_IF_TYPE_AP) { + conf.ssid = sdata->u.ap.ssid; + conf.ssid_len = sdata->u.ap.ssid_len; + conf.generic_elem = sdata->u.ap.generic_elem; + conf.generic_elem_len = sdata->u.ap.generic_elem_len; + conf.beacon = beacon; + conf.beacon_control = control; + } + return local->ops->config_interface(local_to_hw(local), + dev->ifindex, &conf); +} + +int ieee80211_if_config(struct net_device *dev) +{ + return __ieee80211_if_config(dev, NULL, NULL); +} + +int ieee80211_if_config_beacon(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_tx_control control; + struct sk_buff *skb; + + if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) + return 0; + skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control); + if (!skb) + return -ENOMEM; + return __ieee80211_if_config(dev, skb, &control); +} + +int ieee80211_hw_config(struct ieee80211_local *local) +{ + struct ieee80211_hw_mode *mode; + struct ieee80211_channel *chan; + int ret = 0; + + if (local->sta_scanning) { + chan = local->scan_channel; + mode = local->scan_hw_mode; + } else { + chan = local->oper_channel; + mode = local->oper_hw_mode; + } + + local->hw.conf.channel = chan->chan; + local->hw.conf.channel_val = chan->val; + local->hw.conf.power_level = chan->power_level; + local->hw.conf.freq = chan->freq; + local->hw.conf.phymode = mode->mode; + local->hw.conf.antenna_max = chan->antenna_max; + local->hw.conf.chan = chan; + local->hw.conf.mode = mode; + +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d " + "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq, + local->hw.conf.phymode); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + + if (local->ops->config) + ret = local->ops->config(local_to_hw(local), &local->hw.conf); + + return ret; +} + + +static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) +{ + /* FIX: what would be proper limits for MTU? + * This interface uses 802.3 frames. */ + if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) { + printk(KERN_WARNING "%s: invalid MTU %d\n", + dev->name, new_mtu); + return -EINVAL; + } + +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + dev->mtu = new_mtu; + return 0; +} + + +static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu) +{ + /* FIX: what would be proper limits for MTU? + * This interface uses 802.11 frames. */ + if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) { + printk(KERN_WARNING "%s: invalid MTU %d\n", + dev->name, new_mtu); + return -EINVAL; + } + +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + dev->mtu = new_mtu; + return 0; +} + +enum netif_tx_lock_class { + TX_LOCK_NORMAL, + TX_LOCK_MASTER, +}; + +static inline void netif_tx_lock_nested(struct net_device *dev, int subclass) +{ + spin_lock_nested(&dev->_xmit_lock, subclass); + dev->xmit_lock_owner = smp_processor_id(); +} + +static void ieee80211_set_multicast_list(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + unsigned short flags; + + netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER); + if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) { + if (sdata->allmulti) { + sdata->allmulti = 0; + local->iff_allmultis--; + } else { + sdata->allmulti = 1; + local->iff_allmultis++; + } + } + if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) { + if (sdata->promisc) { + sdata->promisc = 0; + local->iff_promiscs--; + } else { + sdata->promisc = 1; + local->iff_promiscs++; + } + } + if (dev->mc_count != sdata->mc_count) { + local->mc_count = local->mc_count - sdata->mc_count + + dev->mc_count; + sdata->mc_count = dev->mc_count; + } + if (local->ops->set_multicast_list) { + flags = local->mdev->flags; + if (local->iff_allmultis) + flags |= IFF_ALLMULTI; + if (local->iff_promiscs) + flags |= IFF_PROMISC; + read_lock(&local->sub_if_lock); + local->ops->set_multicast_list(local_to_hw(local), flags, + local->mc_count); + read_unlock(&local->sub_if_lock); + } + netif_tx_unlock(local->mdev); +} + +struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw, + struct dev_mc_list *prev, + void **ptr) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_sub_if_data *sdata = *ptr; + struct dev_mc_list *mc; + + if (!prev) { + WARN_ON(sdata); + sdata = NULL; + } + if (!prev || !prev->next) { + if (sdata) + sdata = list_entry(sdata->list.next, + struct ieee80211_sub_if_data, list); + else + sdata = list_entry(local->sub_if_list.next, + struct ieee80211_sub_if_data, list); + if (&sdata->list != &local->sub_if_list) + mc = sdata->dev->mc_list; + else + mc = NULL; + } else + mc = prev->next; + + *ptr = sdata; + return mc; +} +EXPORT_SYMBOL(ieee80211_get_mc_list_item); + +static struct net_device_stats *ieee80211_get_stats(struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + return &(sdata->stats); +} + +static void ieee80211_if_shutdown(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + ASSERT_RTNL(); + switch (sdata->type) { + case IEEE80211_IF_TYPE_STA: + case IEEE80211_IF_TYPE_IBSS: + sdata->u.sta.state = IEEE80211_DISABLED; + del_timer_sync(&sdata->u.sta.timer); + skb_queue_purge(&sdata->u.sta.skb_queue); + if (!local->ops->hw_scan && + local->scan_dev == sdata->dev) { + local->sta_scanning = 0; + cancel_delayed_work(&local->scan_work); + } + flush_workqueue(local->hw.workqueue); + break; + } +} + +static inline int identical_mac_addr_allowed(int type1, int type2) +{ + return (type1 == IEEE80211_IF_TYPE_MNTR || + type2 == IEEE80211_IF_TYPE_MNTR || + (type1 == IEEE80211_IF_TYPE_AP && + type2 == IEEE80211_IF_TYPE_WDS) || + (type1 == IEEE80211_IF_TYPE_WDS && + (type2 == IEEE80211_IF_TYPE_WDS || + type2 == IEEE80211_IF_TYPE_AP)) || + (type1 == IEEE80211_IF_TYPE_AP && + type2 == IEEE80211_IF_TYPE_VLAN) || + (type1 == IEEE80211_IF_TYPE_VLAN && + (type2 == IEEE80211_IF_TYPE_AP || + type2 == IEEE80211_IF_TYPE_VLAN))); +} + +static int ieee80211_master_open(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + int res = -EOPNOTSUPP; + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + if (sdata->dev != dev && netif_running(sdata->dev)) { + res = 0; + break; + } + } + read_unlock(&local->sub_if_lock); + return res; +} + +static int ieee80211_master_stop(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) + if (sdata->dev != dev && netif_running(sdata->dev)) + dev_close(sdata->dev); + read_unlock(&local->sub_if_lock); + + return 0; +} + +static int ieee80211_mgmt_open(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (!netif_running(local->mdev)) + return -EOPNOTSUPP; + return 0; +} + +static int ieee80211_mgmt_stop(struct net_device *dev) +{ + return 0; +} + +/* Check if running monitor interfaces should go to a "soft monitor" mode + * and switch them if necessary. */ +static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local) +{ + struct ieee80211_if_init_conf conf; + + if (local->open_count && local->open_count == local->monitors && + !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && + local->ops->remove_interface) { + conf.if_id = -1; + conf.type = IEEE80211_IF_TYPE_MNTR; + conf.mac_addr = NULL; + local->ops->remove_interface(local_to_hw(local), &conf); + } +} + +/* Check if running monitor interfaces should go to a "hard monitor" mode + * and switch them if necessary. */ +static void ieee80211_start_hard_monitor(struct ieee80211_local *local) +{ + struct ieee80211_if_init_conf conf; + + if (local->open_count && local->open_count == local->monitors && + !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && + local->ops->add_interface) { + conf.if_id = -1; + conf.type = IEEE80211_IF_TYPE_MNTR; + conf.mac_addr = NULL; + local->ops->add_interface(local_to_hw(local), &conf); + } +} + +static int ieee80211_open(struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata, *nsdata; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_if_init_conf conf; + int res; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + read_lock(&local->sub_if_lock); + list_for_each_entry(nsdata, &local->sub_if_list, list) { + struct net_device *ndev = nsdata->dev; + + if (ndev != dev && ndev != local->mdev && netif_running(ndev) && + compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 && + !identical_mac_addr_allowed(sdata->type, nsdata->type)) { + read_unlock(&local->sub_if_lock); + return -ENOTUNIQ; + } + } + read_unlock(&local->sub_if_lock); + + if (sdata->type == IEEE80211_IF_TYPE_WDS && + is_zero_ether_addr(sdata->u.wds.remote_addr)) + return -ENOLINK; + + if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count && + !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { + /* run the interface in a "soft monitor" mode */ + local->monitors++; + local->open_count++; + local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; + return 0; + } + ieee80211_start_soft_monitor(local); + + if (local->ops->add_interface) { + conf.if_id = dev->ifindex; + conf.type = sdata->type; + conf.mac_addr = dev->dev_addr; + res = local->ops->add_interface(local_to_hw(local), &conf); + if (res) { + if (sdata->type == IEEE80211_IF_TYPE_MNTR) + ieee80211_start_hard_monitor(local); + return res; + } + } else { + if (sdata->type != IEEE80211_IF_TYPE_STA) + return -EOPNOTSUPP; + if (local->open_count > 0) + return -ENOBUFS; + } + + if (local->open_count == 0) { + res = 0; + tasklet_enable(&local->tx_pending_tasklet); + tasklet_enable(&local->tasklet); + if (local->ops->open) + res = local->ops->open(local_to_hw(local)); + if (res == 0) { + res = dev_open(local->mdev); + if (res) { + if (local->ops->stop) + local->ops->stop(local_to_hw(local)); + } else { + res = ieee80211_hw_config(local); + if (res && local->ops->stop) + local->ops->stop(local_to_hw(local)); + else if (!res && local->apdev) + dev_open(local->apdev); + } + } + if (res) { + if (local->ops->remove_interface) + local->ops->remove_interface(local_to_hw(local), + &conf); + return res; + } + } + local->open_count++; + + if (sdata->type == IEEE80211_IF_TYPE_MNTR) { + local->monitors++; + local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; + } else + ieee80211_if_config(dev); + + if (sdata->type == IEEE80211_IF_TYPE_STA && + !local->user_space_mlme) + netif_carrier_off(dev); + + netif_start_queue(dev); + return 0; +} + + +static int ieee80211_stop(struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (sdata->type == IEEE80211_IF_TYPE_MNTR && + local->open_count > 1 && + !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { + /* remove "soft monitor" interface */ + local->open_count--; + local->monitors--; + if (!local->monitors) + local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; + return 0; + } + + netif_stop_queue(dev); + ieee80211_if_shutdown(dev); + + if (sdata->type == IEEE80211_IF_TYPE_MNTR) { + local->monitors--; + if (!local->monitors) + local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; + } + + local->open_count--; + if (local->open_count == 0) { + if (netif_running(local->mdev)) + dev_close(local->mdev); + if (local->apdev) + dev_close(local->apdev); + if (local->ops->stop) + local->ops->stop(local_to_hw(local)); + tasklet_disable(&local->tx_pending_tasklet); + tasklet_disable(&local->tasklet); + } + if (local->ops->remove_interface) { + struct ieee80211_if_init_conf conf; + + conf.if_id = dev->ifindex; + conf.type = sdata->type; + conf.mac_addr = dev->dev_addr; + local->ops->remove_interface(local_to_hw(local), &conf); + } + + ieee80211_start_hard_monitor(local); + + return 0; +} + + +static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr) +{ + memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ + return ETH_ALEN; +} + +static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) +{ + return compare_ether_addr(raddr, addr) == 0 || + is_broadcast_ether_addr(raddr); +} + + +static ieee80211_txrx_result +ieee80211_rx_h_data(struct ieee80211_txrx_data *rx) +{ + struct net_device *dev = rx->dev; + struct ieee80211_local *local = rx->local; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; + u16 fc, hdrlen, ethertype; + u8 *payload; + u8 dst[ETH_ALEN]; + u8 src[ETH_ALEN]; + struct sk_buff *skb = rx->skb, *skb2; + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + fc = rx->fc; + if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) + return TXRX_CONTINUE; + + if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) + return TXRX_DROP; + + hdrlen = ieee80211_get_hdrlen(fc); + + /* convert IEEE 802.11 header + possible LLC headers into Ethernet + * header + * IEEE 802.11 address fields: + * ToDS FromDS Addr1 Addr2 Addr3 Addr4 + * 0 0 DA SA BSSID n/a + * 0 1 DA BSSID SA n/a + * 1 0 BSSID SA DA n/a + * 1 1 RA TA DA SA + */ + + switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { + case IEEE80211_FCTL_TODS: + /* BSSID SA DA */ + memcpy(dst, hdr->addr3, ETH_ALEN); + memcpy(src, hdr->addr2, ETH_ALEN); + + if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP && + sdata->type != IEEE80211_IF_TYPE_VLAN)) { + printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID=" + MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n", + dev->name, MAC_ARG(hdr->addr1), + MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3)); + return TXRX_DROP; + } + break; + case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): + /* RA TA DA SA */ + memcpy(dst, hdr->addr3, ETH_ALEN); + memcpy(src, hdr->addr4, ETH_ALEN); + + if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) { + printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA=" + MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA=" + MAC_FMT ")\n", + rx->dev->name, MAC_ARG(hdr->addr1), + MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3), + MAC_ARG(hdr->addr4)); + return TXRX_DROP; + } + break; + case IEEE80211_FCTL_FROMDS: + /* DA BSSID SA */ + memcpy(dst, hdr->addr1, ETH_ALEN); + memcpy(src, hdr->addr3, ETH_ALEN); + + if (sdata->type != IEEE80211_IF_TYPE_STA) { + return TXRX_DROP; + } + break; + case 0: + /* DA SA BSSID */ + memcpy(dst, hdr->addr1, ETH_ALEN); + memcpy(src, hdr->addr2, ETH_ALEN); + + if (sdata->type != IEEE80211_IF_TYPE_IBSS) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: dropped IBSS frame (DA=" + MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT + ")\n", + dev->name, MAC_ARG(hdr->addr1), + MAC_ARG(hdr->addr2), + MAC_ARG(hdr->addr3)); + } + return TXRX_DROP; + } + break; + } + + payload = skb->data + hdrlen; + + if (unlikely(skb->len - hdrlen < 8)) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: RX too short data frame " + "payload\n", dev->name); + } + return TXRX_DROP; + } + + ethertype = (payload[6] << 8) | payload[7]; + + if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && + ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || + compare_ether_addr(payload, bridge_tunnel_header) == 0)) { + /* remove RFC1042 or Bridge-Tunnel encapsulation and + * replace EtherType */ + skb_pull(skb, hdrlen + 6); + memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); + memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); + } else { + struct ethhdr *ehdr; + __be16 len; + skb_pull(skb, hdrlen); + len = htons(skb->len); + ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); + memcpy(ehdr->h_dest, dst, ETH_ALEN); + memcpy(ehdr->h_source, src, ETH_ALEN); + ehdr->h_proto = len; + } + skb->dev = dev; + + skb2 = NULL; + + sdata->stats.rx_packets++; + sdata->stats.rx_bytes += skb->len; + + if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP + || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) { + if (is_multicast_ether_addr(skb->data)) { + /* send multicast frames both to higher layers in + * local net stack and back to the wireless media */ + skb2 = skb_copy(skb, GFP_ATOMIC); + if (!skb2) + printk(KERN_DEBUG "%s: failed to clone " + "multicast frame\n", dev->name); + } else { + struct sta_info *dsta; + dsta = sta_info_get(local, skb->data); + if (dsta && !dsta->dev) { + printk(KERN_DEBUG "Station with null dev " + "structure!\n"); + } else if (dsta && dsta->dev == dev) { + /* Destination station is associated to this + * AP, so send the frame directly to it and + * do not pass the frame to local net stack. + */ + skb2 = skb; + skb = NULL; + } + if (dsta) + sta_info_put(dsta); + } + } + + if (skb) { + /* deliver to local stack */ + skb->protocol = eth_type_trans(skb, dev); + memset(skb->cb, 0, sizeof(skb->cb)); + netif_rx(skb); + } + + if (skb2) { + /* send to wireless media */ + skb2->protocol = __constant_htons(ETH_P_802_3); + skb_set_network_header(skb2, 0); + skb_set_mac_header(skb2, 0); + dev_queue_xmit(skb2); + } + + return TXRX_QUEUED; +} + + +static struct ieee80211_rate * +ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) +{ + struct ieee80211_hw_mode *mode; + int r; + + list_for_each_entry(mode, &local->modes_list, list) { + if (mode->mode != phymode) + continue; + for (r = 0; r < mode->num_rates; r++) { + struct ieee80211_rate *rate = &mode->rates[r]; + if (rate->val == hw_rate || + (rate->flags & IEEE80211_RATE_PREAMBLE2 && + rate->val2 == hw_rate)) + return rate; + } + } + + return NULL; +} + +static void +ieee80211_fill_frame_info(struct ieee80211_local *local, + struct ieee80211_frame_info *fi, + struct ieee80211_rx_status *status) +{ + if (status) { + struct timespec ts; + struct ieee80211_rate *rate; + + jiffies_to_timespec(jiffies, &ts); + fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 + + ts.tv_nsec / 1000); + fi->mactime = cpu_to_be64(status->mactime); + switch (status->phymode) { + case MODE_IEEE80211A: + fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a); + break; + case MODE_IEEE80211B: + fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b); + break; + case MODE_IEEE80211G: + fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g); + break; + case MODE_ATHEROS_TURBO: + fi->phytype = + htonl(ieee80211_phytype_dsss_dot11_turbo); + break; + default: + fi->phytype = htonl(0xAAAAAAAA); + break; + } + fi->channel = htonl(status->channel); + rate = ieee80211_get_rate(local, status->phymode, + status->rate); + if (rate) { + fi->datarate = htonl(rate->rate); + if (rate->flags & IEEE80211_RATE_PREAMBLE2) { + if (status->rate == rate->val) + fi->preamble = htonl(2); /* long */ + else if (status->rate == rate->val2) + fi->preamble = htonl(1); /* short */ + } else + fi->preamble = htonl(0); + } else { + fi->datarate = htonl(0); + fi->preamble = htonl(0); + } + + fi->antenna = htonl(status->antenna); + fi->priority = htonl(0xffffffff); /* no clue */ + fi->ssi_type = htonl(ieee80211_ssi_raw); + fi->ssi_signal = htonl(status->ssi); + fi->ssi_noise = 0x00000000; + fi->encoding = 0; + } else { + /* clear everything because we really don't know. + * the msg_type field isn't present on monitor frames + * so we don't know whether it will be present or not, + * but it's ok to not clear it since it'll be assigned + * anyway */ + memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type)); + + fi->ssi_type = htonl(ieee80211_ssi_none); + } + fi->version = htonl(IEEE80211_FI_VERSION); + fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type)); +} + +/* this routine is actually not just for this, but also + * for pushing fake 'management' frames into userspace. + * it shall be replaced by a netlink-based system. */ +void +ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_rx_status *status, u32 msg_type) +{ + struct ieee80211_frame_info *fi; + const size_t hlen = sizeof(struct ieee80211_frame_info); + struct ieee80211_sub_if_data *sdata; + + skb->dev = local->apdev; + + sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev); + + if (skb_headroom(skb) < hlen) { + I802_DEBUG_INC(local->rx_expand_skb_head); + if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) { + dev_kfree_skb(skb); + return; + } + } + + fi = (struct ieee80211_frame_info *) skb_push(skb, hlen); + + ieee80211_fill_frame_info(local, fi, status); + fi->msg_type = htonl(msg_type); + + sdata->stats.rx_packets++; + sdata->stats.rx_bytes += skb->len; + + skb_set_mac_header(skb, 0); + skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->pkt_type = PACKET_OTHERHOST; + skb->protocol = htons(ETH_P_802_2); + memset(skb->cb, 0, sizeof(skb->cb)); + netif_rx(skb); +} + +static void +ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb, + struct ieee80211_rx_status *status) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + struct ieee80211_rate *rate; + struct ieee80211_rtap_hdr { + struct ieee80211_radiotap_header hdr; + u8 flags; + u8 rate; + __le16 chan_freq; + __le16 chan_flags; + u8 antsignal; + } __attribute__ ((packed)) *rthdr; + + skb->dev = dev; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (status->flag & RX_FLAG_RADIOTAP) + goto out; + + if (skb_headroom(skb) < sizeof(*rthdr)) { + I802_DEBUG_INC(local->rx_expand_skb_head); + if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) { + dev_kfree_skb(skb); + return; + } + } + + rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr)); + memset(rthdr, 0, sizeof(*rthdr)); + rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); + rthdr->hdr.it_present = + cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | + (1 << IEEE80211_RADIOTAP_RATE) | + (1 << IEEE80211_RADIOTAP_CHANNEL) | + (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL)); + rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ? + IEEE80211_RADIOTAP_F_FCS : 0; + rate = ieee80211_get_rate(local, status->phymode, status->rate); + if (rate) + rthdr->rate = rate->rate / 5; + rthdr->chan_freq = cpu_to_le16(status->freq); + rthdr->chan_flags = + status->phymode == MODE_IEEE80211A ? + cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) : + cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ); + rthdr->antsignal = status->ssi; + + out: + sdata->stats.rx_packets++; + sdata->stats.rx_bytes += skb->len; + + skb_set_mac_header(skb, 0); + skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->pkt_type = PACKET_OTHERHOST; + skb->protocol = htons(ETH_P_802_2); + memset(skb->cb, 0, sizeof(skb->cb)); + netif_rx(skb); +} + +int ieee80211_radar_status(struct ieee80211_hw *hw, int channel, + int radar, int radar_type) +{ + struct sk_buff *skb; + struct ieee80211_radar_info *msg; + struct ieee80211_local *local = hw_to_local(hw); + + if (!local->apdev) + return 0; + + skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + + sizeof(struct ieee80211_radar_info)); + + if (!skb) + return -ENOMEM; + skb_reserve(skb, sizeof(struct ieee80211_frame_info)); + + msg = (struct ieee80211_radar_info *) + skb_put(skb, sizeof(struct ieee80211_radar_info)); + msg->channel = channel; + msg->radar = radar; + msg->radar_type = radar_type; + + ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar); + return 0; +} +EXPORT_SYMBOL(ieee80211_radar_status); + +int ieee80211_set_aid_for_sta(struct ieee80211_hw *hw, u8 *peer_address, + u16 aid) +{ + struct sk_buff *skb; + struct ieee80211_msg_set_aid_for_sta *msg; + struct ieee80211_local *local = hw_to_local(hw); + + /* unlikely because if this event only happens for APs, + * which require an open ap device. */ + if (unlikely(!local->apdev)) + return 0; + + skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + + sizeof(struct ieee80211_msg_set_aid_for_sta)); + + if (!skb) + return -ENOMEM; + skb_reserve(skb, sizeof(struct ieee80211_frame_info)); + + msg = (struct ieee80211_msg_set_aid_for_sta *) + skb_put(skb, sizeof(struct ieee80211_msg_set_aid_for_sta)); + memcpy(msg->sta_address, peer_address, ETH_ALEN); + msg->aid = aid; + + ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_set_aid_for_sta); + return 0; +} +EXPORT_SYMBOL(ieee80211_set_aid_for_sta); + +static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta) +{ + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); + + if (sdata->bss) + atomic_inc(&sdata->bss->num_sta_ps); + sta->flags |= WLAN_STA_PS; + sta->pspoll = 0; +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power " + "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid); +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ +} + + +static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sk_buff *skb; + int sent = 0; + struct ieee80211_sub_if_data *sdata; + struct ieee80211_tx_packet_data *pkt_data; + + sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); + if (sdata->bss) + atomic_dec(&sdata->bss->num_sta_ps); + sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM); + sta->pspoll = 0; + if (!skb_queue_empty(&sta->ps_tx_buf)) { + if (local->ops->set_tim) + local->ops->set_tim(local_to_hw(local), sta->aid, 0); + if (sdata->bss) + bss_tim_clear(local, sdata->bss, sta->aid); + } +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power " + "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid); +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + /* Send all buffered frames to the station */ + while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { + pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; + sent++; + pkt_data->requeue = 1; + dev_queue_xmit(skb); + } + while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { + pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; + local->total_ps_buffered--; + sent++; +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame " + "since STA not sleeping anymore\n", dev->name, + MAC_ARG(sta->addr), sta->aid); +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + pkt_data->requeue = 1; + dev_queue_xmit(skb); + } + + return sent; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx) +{ + struct sk_buff *skb; + int no_pending_pkts; + + if (likely(!rx->sta || + (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL || + (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL || + !rx->u.rx.ra_match)) + return TXRX_CONTINUE; + + skb = skb_dequeue(&rx->sta->tx_filtered); + if (!skb) { + skb = skb_dequeue(&rx->sta->ps_tx_buf); + if (skb) + rx->local->total_ps_buffered--; + } + no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && + skb_queue_empty(&rx->sta->ps_tx_buf); + + if (skb) { + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *) skb->data; + + /* tell TX path to send one frame even though the STA may + * still remain is PS mode after this frame exchange */ + rx->sta->pspoll = 1; + +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries " + "after %d)\n", + MAC_ARG(rx->sta->addr), rx->sta->aid, + skb_queue_len(&rx->sta->ps_tx_buf)); +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + + /* Use MoreData flag to indicate whether there are more + * buffered frames for this STA */ + if (no_pending_pkts) { + hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); + rx->sta->flags &= ~WLAN_STA_TIM; + } else + hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); + + dev_queue_xmit(skb); + + if (no_pending_pkts) { + if (rx->local->ops->set_tim) + rx->local->ops->set_tim(local_to_hw(rx->local), + rx->sta->aid, 0); + if (rx->sdata->bss) + bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid); + } +#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG + } else if (!rx->u.rx.sent_ps_buffered) { + printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even " + "though there is no buffered frames for it\n", + rx->dev->name, MAC_ARG(rx->sta->addr)); +#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + + } + + /* Free PS Poll skb here instead of returning TXRX_DROP that would + * count as an dropped frame. */ + dev_kfree_skb(rx->skb); + + return TXRX_QUEUED; +} + + +static inline struct ieee80211_fragment_entry * +ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, + unsigned int frag, unsigned int seq, int rx_queue, + struct sk_buff **skb) +{ + struct ieee80211_fragment_entry *entry; + int idx; + + idx = sdata->fragment_next; + entry = &sdata->fragments[sdata->fragment_next++]; + if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) + sdata->fragment_next = 0; + + if (!skb_queue_empty(&entry->skb_list)) { +#ifdef CONFIG_MAC80211_DEBUG + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *) entry->skb_list.next->data; + printk(KERN_DEBUG "%s: RX reassembly removed oldest " + "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " + "addr1=" MAC_FMT " addr2=" MAC_FMT "\n", + sdata->dev->name, idx, + jiffies - entry->first_frag_time, entry->seq, + entry->last_frag, MAC_ARG(hdr->addr1), + MAC_ARG(hdr->addr2)); +#endif /* CONFIG_MAC80211_DEBUG */ + __skb_queue_purge(&entry->skb_list); + } + + __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ + *skb = NULL; + entry->first_frag_time = jiffies; + entry->seq = seq; + entry->rx_queue = rx_queue; + entry->last_frag = frag; + entry->ccmp = 0; + entry->extra_len = 0; + + return entry; +} + + +static inline struct ieee80211_fragment_entry * +ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, + u16 fc, unsigned int frag, unsigned int seq, + int rx_queue, struct ieee80211_hdr *hdr) +{ + struct ieee80211_fragment_entry *entry; + int i, idx; + + idx = sdata->fragment_next; + for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { + struct ieee80211_hdr *f_hdr; + u16 f_fc; + + idx--; + if (idx < 0) + idx = IEEE80211_FRAGMENT_MAX - 1; + + entry = &sdata->fragments[idx]; + if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || + entry->rx_queue != rx_queue || + entry->last_frag + 1 != frag) + continue; + + f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data; + f_fc = le16_to_cpu(f_hdr->frame_control); + + if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) || + compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || + compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) + continue; + + if (entry->first_frag_time + 2 * HZ < jiffies) { + __skb_queue_purge(&entry->skb_list); + continue; + } + return entry; + } + + return NULL; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_hdr *hdr; + u16 sc; + unsigned int frag, seq; + struct ieee80211_fragment_entry *entry; + struct sk_buff *skb; + + hdr = (struct ieee80211_hdr *) rx->skb->data; + sc = le16_to_cpu(hdr->seq_ctrl); + frag = sc & IEEE80211_SCTL_FRAG; + + if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) || + (rx->skb)->len < 24 || + is_multicast_ether_addr(hdr->addr1))) { + /* not fragmented */ + goto out; + } + I802_DEBUG_INC(rx->local->rx_handlers_fragments); + + seq = (sc & IEEE80211_SCTL_SEQ) >> 4; + + if (frag == 0) { + /* This is the first fragment of a new frame. */ + entry = ieee80211_reassemble_add(rx->sdata, frag, seq, + rx->u.rx.queue, &(rx->skb)); + if (rx->key && rx->key->alg == ALG_CCMP && + (rx->fc & IEEE80211_FCTL_PROTECTED)) { + /* Store CCMP PN so that we can verify that the next + * fragment has a sequential PN value. */ + entry->ccmp = 1; + memcpy(entry->last_pn, + rx->key->u.ccmp.rx_pn[rx->u.rx.queue], + CCMP_PN_LEN); + } + return TXRX_QUEUED; + } + + /* This is a fragment for a frame that should already be pending in + * fragment cache. Add this fragment to the end of the pending entry. + */ + entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq, + rx->u.rx.queue, hdr); + if (!entry) { + I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); + return TXRX_DROP; + } + + /* Verify that MPDUs within one MSDU have sequential PN values. + * (IEEE 802.11i, 8.3.3.4.5) */ + if (entry->ccmp) { + int i; + u8 pn[CCMP_PN_LEN], *rpn; + if (!rx->key || rx->key->alg != ALG_CCMP) + return TXRX_DROP; + memcpy(pn, entry->last_pn, CCMP_PN_LEN); + for (i = CCMP_PN_LEN - 1; i >= 0; i--) { + pn[i]++; + if (pn[i]) + break; + } + rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue]; + if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) { + printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential" + " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x " + "(expected %02x%02x%02x%02x%02x%02x)\n", + rx->dev->name, MAC_ARG(hdr->addr2), + rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5], + pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]); + return TXRX_DROP; + } + memcpy(entry->last_pn, pn, CCMP_PN_LEN); + } + + skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc)); + __skb_queue_tail(&entry->skb_list, rx->skb); + entry->last_frag = frag; + entry->extra_len += rx->skb->len; + if (rx->fc & IEEE80211_FCTL_MOREFRAGS) { + rx->skb = NULL; + return TXRX_QUEUED; + } + + rx->skb = __skb_dequeue(&entry->skb_list); + if (skb_tailroom(rx->skb) < entry->extra_len) { + I802_DEBUG_INC(rx->local->rx_expand_skb_head2); + if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, + GFP_ATOMIC))) { + I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); + __skb_queue_purge(&entry->skb_list); + return TXRX_DROP; + } + } + while ((skb = __skb_dequeue(&entry->skb_list))) + memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); + + /* Complete frame has been reassembled - process it now */ + rx->fragmented = 1; + + out: + if (rx->sta) + rx->sta->rx_packets++; + if (is_multicast_ether_addr(hdr->addr1)) + rx->local->dot11MulticastReceivedFrameCount++; + else + ieee80211_led_rx(rx->local); + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx) +{ + if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) { + ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status); + return TXRX_QUEUED; + } + + if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP) + skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb)); + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_check(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_hdr *hdr; + int always_sta_key; + hdr = (struct ieee80211_hdr *) rx->skb->data; + + /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ + if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { + if (unlikely(rx->fc & IEEE80211_FCTL_RETRY && + rx->sta->last_seq_ctrl[rx->u.rx.queue] == + hdr->seq_ctrl)) { + if (rx->u.rx.ra_match) { + rx->local->dot11FrameDuplicateCount++; + rx->sta->num_duplicates++; + } + return TXRX_DROP; + } else + rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl; + } + + if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) && + rx->skb->len > FCS_LEN) + skb_trim(rx->skb, rx->skb->len - FCS_LEN); + + if (unlikely(rx->skb->len < 16)) { + I802_DEBUG_INC(rx->local->rx_handlers_drop_short); + return TXRX_DROP; + } + + if (!rx->u.rx.ra_match) + rx->skb->pkt_type = PACKET_OTHERHOST; + else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0) + rx->skb->pkt_type = PACKET_HOST; + else if (is_multicast_ether_addr(hdr->addr1)) { + if (is_broadcast_ether_addr(hdr->addr1)) + rx->skb->pkt_type = PACKET_BROADCAST; + else + rx->skb->pkt_type = PACKET_MULTICAST; + } else + rx->skb->pkt_type = PACKET_OTHERHOST; + + /* Drop disallowed frame classes based on STA auth/assoc state; + * IEEE 802.11, Chap 5.5. + * + * 80211.o does filtering only based on association state, i.e., it + * drops Class 3 frames from not associated stations. hostapd sends + * deauth/disassoc frames when needed. In addition, hostapd is + * responsible for filtering on both auth and assoc states. + */ + if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA || + ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL && + (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) && + rx->sdata->type != IEEE80211_IF_TYPE_IBSS && + (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) { + if ((!(rx->fc & IEEE80211_FCTL_FROMDS) && + !(rx->fc & IEEE80211_FCTL_TODS) && + (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) + || !rx->u.rx.ra_match) { + /* Drop IBSS frames and frames for other hosts + * silently. */ + return TXRX_DROP; + } + + if (!rx->local->apdev) + return TXRX_DROP; + + ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, + ieee80211_msg_sta_not_assoc); + return TXRX_QUEUED; + } + + if (rx->sdata->type == IEEE80211_IF_TYPE_STA) + always_sta_key = 0; + else + always_sta_key = 1; + + if (rx->sta && rx->sta->key && always_sta_key) { + rx->key = rx->sta->key; + } else { + if (rx->sta && rx->sta->key) + rx->key = rx->sta->key; + else + rx->key = rx->sdata->default_key; + + if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && + rx->fc & IEEE80211_FCTL_PROTECTED) { + int keyidx = ieee80211_wep_get_keyidx(rx->skb); + + if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS && + (!rx->sta || !rx->sta->key || keyidx > 0)) + rx->key = rx->sdata->keys[keyidx]; + + if (!rx->key) { + if (!rx->u.rx.ra_match) + return TXRX_DROP; + printk(KERN_DEBUG "%s: RX WEP frame with " + "unknown keyidx %d (A1=" MAC_FMT " A2=" + MAC_FMT " A3=" MAC_FMT ")\n", + rx->dev->name, keyidx, + MAC_ARG(hdr->addr1), + MAC_ARG(hdr->addr2), + MAC_ARG(hdr->addr3)); + if (!rx->local->apdev) + return TXRX_DROP; + ieee80211_rx_mgmt( + rx->local, rx->skb, rx->u.rx.status, + ieee80211_msg_wep_frame_unknown_key); + return TXRX_QUEUED; + } + } + } + + if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) { + rx->key->tx_rx_count++; + if (unlikely(rx->local->key_tx_rx_threshold && + rx->key->tx_rx_count > + rx->local->key_tx_rx_threshold)) { + ieee80211_key_threshold_notify(rx->dev, rx->key, + rx->sta); + } + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx) +{ + struct sta_info *sta = rx->sta; + struct net_device *dev = rx->dev; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; + + if (!sta) + return TXRX_CONTINUE; + + /* Update last_rx only for IBSS packets which are for the current + * BSSID to avoid keeping the current IBSS network alive in cases where + * other STAs are using different BSSID. */ + if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) { + u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len); + if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0) + sta->last_rx = jiffies; + } else + if (!is_multicast_ether_addr(hdr->addr1) || + rx->sdata->type == IEEE80211_IF_TYPE_STA) { + /* Update last_rx only for unicast frames in order to prevent + * the Probe Request frames (the only broadcast frames from a + * STA in infrastructure mode) from keeping a connection alive. + */ + sta->last_rx = jiffies; + } + + if (!rx->u.rx.ra_match) + return TXRX_CONTINUE; + + sta->rx_fragments++; + sta->rx_bytes += rx->skb->len; + sta->last_rssi = (sta->last_rssi * 15 + + rx->u.rx.status->ssi) / 16; + sta->last_signal = (sta->last_signal * 15 + + rx->u.rx.status->signal) / 16; + sta->last_noise = (sta->last_noise * 15 + + rx->u.rx.status->noise) / 16; + + if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) { + /* Change STA power saving mode only in the end of a frame + * exchange sequence */ + if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM)) + rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta); + else if (!(sta->flags & WLAN_STA_PS) && + (rx->fc & IEEE80211_FCTL_PM)) + ap_sta_ps_start(dev, sta); + } + + /* Drop data::nullfunc frames silently, since they are used only to + * control station power saving mode. */ + if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && + (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) { + I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); + /* Update counter and free packet here to avoid counting this + * as a dropped packed. */ + sta->rx_packets++; + dev_kfree_skb(rx->skb); + return TXRX_QUEUED; + } + + return TXRX_CONTINUE; +} /* ieee80211_rx_h_sta_process */ + + +static ieee80211_txrx_result +ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx) +{ + if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) || + (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA || + !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match) + return TXRX_CONTINUE; + + /* Check for weak IVs, if hwaccel did not remove IV from the frame */ + if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) || + rx->key->force_sw_encrypt) { + u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key); + if (iv) { + rx->sta->wep_weak_iv_count++; + } + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx) +{ + /* If the device handles decryption totally, skip this test */ + if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) + return TXRX_CONTINUE; + + if ((rx->key && rx->key->alg != ALG_WEP) || + !(rx->fc & IEEE80211_FCTL_PROTECTED) || + ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && + ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || + (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) + return TXRX_CONTINUE; + + if (!rx->key) { + printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n", + rx->dev->name); + return TXRX_DROP; + } + + if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) || + rx->key->force_sw_encrypt) { + if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) { + printk(KERN_DEBUG "%s: RX WEP frame, decrypt " + "failed\n", rx->dev->name); + return TXRX_DROP; + } + } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { + ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key); + /* remove ICV */ + skb_trim(rx->skb, rx->skb->len - 4); + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx) +{ + if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) && + rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) { + /* Pass both encrypted and unencrypted EAPOL frames to user + * space for processing. */ + if (!rx->local->apdev) + return TXRX_DROP; + ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, + ieee80211_msg_normal); + return TXRX_QUEUED; + } + + if (unlikely(rx->sdata->ieee802_1x && + (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && + (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && + (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) && + !ieee80211_is_eapol(rx->skb))) { +#ifdef CONFIG_MAC80211_DEBUG + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *) rx->skb->data; + printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT + " (unauthorized port)\n", rx->dev->name, + MAC_ARG(hdr->addr2)); +#endif /* CONFIG_MAC80211_DEBUG */ + return TXRX_DROP; + } + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx) +{ + /* If the device handles decryption totally, skip this test */ + if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) + return TXRX_CONTINUE; + + /* Drop unencrypted frames if key is set. */ + if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) && + (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && + (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && + (rx->key || rx->sdata->drop_unencrypted) && + (rx->sdata->eapol == 0 || + !ieee80211_is_eapol(rx->skb)))) { + printk(KERN_DEBUG "%s: RX non-WEP frame, but expected " + "encryption\n", rx->dev->name); + return TXRX_DROP; + } + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_sub_if_data *sdata; + + if (!rx->u.rx.ra_match) + return TXRX_DROP; + + sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); + if ((sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) && + !rx->local->user_space_mlme) { + ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status); + } else { + /* Management frames are sent to hostapd for processing */ + if (!rx->local->apdev) + return TXRX_DROP; + ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, + ieee80211_msg_normal); + } + return TXRX_QUEUED; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_local *local = rx->local; + struct sk_buff *skb = rx->skb; + + if (unlikely(local->sta_scanning != 0)) { + ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status); + return TXRX_QUEUED; + } + + if (unlikely(rx->u.rx.in_scan)) { + /* scanning finished during invoking of handlers */ + I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); + return TXRX_DROP; + } + + return TXRX_CONTINUE; +} + + +static void ieee80211_rx_michael_mic_report(struct net_device *dev, + struct ieee80211_hdr *hdr, + struct sta_info *sta, + struct ieee80211_txrx_data *rx) +{ + int keyidx, hdrlen; + + hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb); + if (rx->skb->len >= hdrlen + 4) + keyidx = rx->skb->data[hdrlen + 3] >> 6; + else + keyidx = -1; + + /* TODO: verify that this is not triggered by fragmented + * frames (hw does not verify MIC for them). */ + printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC " + "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n", + dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx); + + if (!sta) { + /* Some hardware versions seem to generate incorrect + * Michael MIC reports; ignore them to avoid triggering + * countermeasures. */ + printk(KERN_DEBUG "%s: ignored spurious Michael MIC " + "error for unknown address " MAC_FMT "\n", + dev->name, MAC_ARG(hdr->addr2)); + goto ignore; + } + + if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) { + printk(KERN_DEBUG "%s: ignored spurious Michael MIC " + "error for a frame with no ISWEP flag (src " + MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2)); + goto ignore; + } + + if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && + rx->sdata->type == IEEE80211_IF_TYPE_AP) { + keyidx = ieee80211_wep_get_keyidx(rx->skb); + /* AP with Pairwise keys support should never receive Michael + * MIC errors for non-zero keyidx because these are reserved + * for group keys and only the AP is sending real multicast + * frames in BSS. */ + if (keyidx) { + printk(KERN_DEBUG "%s: ignored Michael MIC error for " + "a frame with non-zero keyidx (%d) (src " MAC_FMT + ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2)); + goto ignore; + } + } + + if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && + ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || + (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) { + printk(KERN_DEBUG "%s: ignored spurious Michael MIC " + "error for a frame that cannot be encrypted " + "(fc=0x%04x) (src " MAC_FMT ")\n", + dev->name, rx->fc, MAC_ARG(hdr->addr2)); + goto ignore; + } + + do { + union iwreq_data wrqu; + char *buf = kmalloc(128, GFP_ATOMIC); + if (!buf) + break; + + /* TODO: needed parameters: count, key type, TSC */ + sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" + "keyid=%d %scast addr=" MAC_FMT ")", + keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni", + MAC_ARG(hdr->addr2)); + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = strlen(buf); + wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf); + kfree(buf); + } while (0); + + /* TODO: consider verifying the MIC error report with software + * implementation if we get too many spurious reports from the + * hardware. */ + if (!rx->local->apdev) + goto ignore; + ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, + ieee80211_msg_michael_mic_failure); + return; + + ignore: + dev_kfree_skb(rx->skb); + rx->skb = NULL; +} + +static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers( + struct ieee80211_local *local, + ieee80211_rx_handler *handlers, + struct ieee80211_txrx_data *rx, + struct sta_info *sta) +{ + ieee80211_rx_handler *handler; + ieee80211_txrx_result res = TXRX_DROP; + + for (handler = handlers; *handler != NULL; handler++) { + res = (*handler)(rx); + if (res != TXRX_CONTINUE) { + if (res == TXRX_DROP) { + I802_DEBUG_INC(local->rx_handlers_drop); + if (sta) + sta->rx_dropped++; + } + if (res == TXRX_QUEUED) + I802_DEBUG_INC(local->rx_handlers_queued); + break; + } + } + + if (res == TXRX_DROP) { + dev_kfree_skb(rx->skb); + } + return res; +} + +static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local, + ieee80211_rx_handler *handlers, + struct ieee80211_txrx_data *rx, + struct sta_info *sta) +{ + if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) == + TXRX_CONTINUE) + dev_kfree_skb(rx->skb); +} + +/* + * This is the receive path handler. It is called by a low level driver when an + * 802.11 MPDU is received from the hardware. + */ +void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_rx_status *status) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_sub_if_data *sdata; + struct sta_info *sta; + struct ieee80211_hdr *hdr; + struct ieee80211_txrx_data rx; + u16 type; + int multicast; + int radiotap_len = 0; + + if (status->flag & RX_FLAG_RADIOTAP) { + radiotap_len = ieee80211_get_radiotap_len(skb); + skb_pull(skb, radiotap_len); + } + + hdr = (struct ieee80211_hdr *) skb->data; + memset(&rx, 0, sizeof(rx)); + rx.skb = skb; + rx.local = local; + + rx.u.rx.status = status; + rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0; + type = rx.fc & IEEE80211_FCTL_FTYPE; + if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT) + local->dot11ReceivedFragmentCount++; + multicast = is_multicast_ether_addr(hdr->addr1); + + if (skb->len >= 16) + sta = rx.sta = sta_info_get(local, hdr->addr2); + else + sta = rx.sta = NULL; + + if (sta) { + rx.dev = sta->dev; + rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev); + } + + if ((status->flag & RX_FLAG_MMIC_ERROR)) { + ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx); + goto end; + } + + if (unlikely(local->sta_scanning)) + rx.u.rx.in_scan = 1; + + if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx, + sta) != TXRX_CONTINUE) + goto end; + skb = rx.skb; + + skb_push(skb, radiotap_len); + if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) && + !local->iff_promiscs && !multicast) { + rx.u.rx.ra_match = 1; + ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx, + sta); + } else { + struct ieee80211_sub_if_data *prev = NULL; + struct sk_buff *skb_new; + u8 *bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len); + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + rx.u.rx.ra_match = 1; + switch (sdata->type) { + case IEEE80211_IF_TYPE_STA: + if (!bssid) + continue; + if (!ieee80211_bssid_match(bssid, + sdata->u.sta.bssid)) { + if (!rx.u.rx.in_scan) + continue; + rx.u.rx.ra_match = 0; + } else if (!multicast && + compare_ether_addr(sdata->dev->dev_addr, + hdr->addr1) != 0) { + if (!sdata->promisc) + continue; + rx.u.rx.ra_match = 0; + } + break; + case IEEE80211_IF_TYPE_IBSS: + if (!bssid) + continue; + if (!ieee80211_bssid_match(bssid, + sdata->u.sta.bssid)) { + if (!rx.u.rx.in_scan) + continue; + rx.u.rx.ra_match = 0; + } else if (!multicast && + compare_ether_addr(sdata->dev->dev_addr, + hdr->addr1) != 0) { + if (!sdata->promisc) + continue; + rx.u.rx.ra_match = 0; + } else if (!sta) + sta = rx.sta = + ieee80211_ibss_add_sta(sdata->dev, + skb, bssid, + hdr->addr2); + break; + case IEEE80211_IF_TYPE_AP: + if (!bssid) { + if (compare_ether_addr(sdata->dev->dev_addr, + hdr->addr1) != 0) + continue; + } else if (!ieee80211_bssid_match(bssid, + sdata->dev->dev_addr)) { + if (!rx.u.rx.in_scan) + continue; + rx.u.rx.ra_match = 0; + } + if (sdata->dev == local->mdev && + !rx.u.rx.in_scan) + /* do not receive anything via + * master device when not scanning */ + continue; + break; + case IEEE80211_IF_TYPE_WDS: + if (bssid || + (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) + continue; + if (compare_ether_addr(sdata->u.wds.remote_addr, + hdr->addr2) != 0) + continue; + break; + } + + if (prev) { + skb_new = skb_copy(skb, GFP_ATOMIC); + if (!skb_new) { + if (net_ratelimit()) + printk(KERN_DEBUG "%s: failed to copy " + "multicast frame for %s", + local->mdev->name, prev->dev->name); + continue; + } + rx.skb = skb_new; + rx.dev = prev->dev; + rx.sdata = prev; + ieee80211_invoke_rx_handlers(local, + local->rx_handlers, + &rx, sta); + } + prev = sdata; + } + if (prev) { + rx.skb = skb; + rx.dev = prev->dev; + rx.sdata = prev; + ieee80211_invoke_rx_handlers(local, local->rx_handlers, + &rx, sta); + } else + dev_kfree_skb(skb); + read_unlock(&local->sub_if_lock); + } + + end: + if (sta) + sta_info_put(sta); +} +EXPORT_SYMBOL(__ieee80211_rx); + +static ieee80211_txrx_result +ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_local *local = tx->local; + struct ieee80211_hw_mode *mode = tx->u.tx.mode; + struct sk_buff *skb = tx->skb; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u32 load = 0, hdrtime; + + /* TODO: this could be part of tx_status handling, so that the number + * of retries would be known; TX rate should in that case be stored + * somewhere with the packet */ + + /* Estimate total channel use caused by this frame */ + + /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, + * 1 usec = 1/8 * (1080 / 10) = 13.5 */ + + if (mode->mode == MODE_IEEE80211A || + mode->mode == MODE_ATHEROS_TURBO || + mode->mode == MODE_ATHEROS_TURBOG || + (mode->mode == MODE_IEEE80211G && + tx->u.tx.rate->flags & IEEE80211_RATE_ERP)) + hdrtime = CHAN_UTIL_HDR_SHORT; + else + hdrtime = CHAN_UTIL_HDR_LONG; + + load = hdrtime; + if (!is_multicast_ether_addr(hdr->addr1)) + load += hdrtime; + + if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS) + load += 2 * hdrtime; + else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) + load += hdrtime; + + load += skb->len * tx->u.tx.rate->rate_inv; + + if (tx->u.tx.extra_frag) { + int i; + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + load += 2 * hdrtime; + load += tx->u.tx.extra_frag[i]->len * + tx->u.tx.rate->rate; + } + } + + /* Divide channel_use by 8 to avoid wrapping around the counter */ + load >>= CHAN_UTIL_SHIFT; + local->channel_use_raw += load; + if (tx->sta) + tx->sta->channel_use_raw += load; + tx->sdata->channel_use_raw += load; + + return TXRX_CONTINUE; +} + + +static ieee80211_txrx_result +ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_local *local = rx->local; + struct sk_buff *skb = rx->skb; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u32 load = 0, hdrtime; + struct ieee80211_rate *rate; + struct ieee80211_hw_mode *mode = local->hw.conf.mode; + int i; + + /* Estimate total channel use caused by this frame */ + + if (unlikely(mode->num_rates < 0)) + return TXRX_CONTINUE; + + rate = &mode->rates[0]; + for (i = 0; i < mode->num_rates; i++) { + if (mode->rates[i].val == rx->u.rx.status->rate) { + rate = &mode->rates[i]; + break; + } + } + + /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, + * 1 usec = 1/8 * (1080 / 10) = 13.5 */ + + if (mode->mode == MODE_IEEE80211A || + mode->mode == MODE_ATHEROS_TURBO || + mode->mode == MODE_ATHEROS_TURBOG || + (mode->mode == MODE_IEEE80211G && + rate->flags & IEEE80211_RATE_ERP)) + hdrtime = CHAN_UTIL_HDR_SHORT; + else + hdrtime = CHAN_UTIL_HDR_LONG; + + load = hdrtime; + if (!is_multicast_ether_addr(hdr->addr1)) + load += hdrtime; + + load += skb->len * rate->rate_inv; + + /* Divide channel_use by 8 to avoid wrapping around the counter */ + load >>= CHAN_UTIL_SHIFT; + local->channel_use_raw += load; + if (rx->sta) + rx->sta->channel_use_raw += load; + rx->u.rx.load = load; + + return TXRX_CONTINUE; +} + +static ieee80211_txrx_result +ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx) +{ + rx->sdata->channel_use_raw += rx->u.rx.load; + return TXRX_CONTINUE; +} + +static void ieee80211_stat_refresh(unsigned long data) +{ + struct ieee80211_local *local = (struct ieee80211_local *) data; + struct sta_info *sta; + struct ieee80211_sub_if_data *sdata; + + if (!local->stat_time) + return; + + /* go through all stations */ + spin_lock_bh(&local->sta_lock); + list_for_each_entry(sta, &local->sta_list, list) { + sta->channel_use = (sta->channel_use_raw / local->stat_time) / + CHAN_UTIL_PER_10MS; + sta->channel_use_raw = 0; + } + spin_unlock_bh(&local->sta_lock); + + /* go through all subinterfaces */ + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + sdata->channel_use = (sdata->channel_use_raw / + local->stat_time) / CHAN_UTIL_PER_10MS; + sdata->channel_use_raw = 0; + } + read_unlock(&local->sub_if_lock); + + /* hardware interface */ + local->channel_use = (local->channel_use_raw / + local->stat_time) / CHAN_UTIL_PER_10MS; + local->channel_use_raw = 0; + + local->stat_timer.expires = jiffies + HZ * local->stat_time / 100; + add_timer(&local->stat_timer); +} + + +/* This is a version of the rx handler that can be called from hard irq + * context. Post the skb on the queue and schedule the tasklet */ +void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_rx_status *status) +{ + struct ieee80211_local *local = hw_to_local(hw); + + BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); + + skb->dev = local->mdev; + /* copy status into skb->cb for use by tasklet */ + memcpy(skb->cb, status, sizeof(*status)); + skb->pkt_type = IEEE80211_RX_MSG; + skb_queue_tail(&local->skb_queue, skb); + tasklet_schedule(&local->tasklet); +} +EXPORT_SYMBOL(ieee80211_rx_irqsafe); + +void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, + struct sk_buff *skb, + struct ieee80211_tx_status *status) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_tx_status *saved; + int tmp; + + skb->dev = local->mdev; + saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC); + if (unlikely(!saved)) { + if (net_ratelimit()) + printk(KERN_WARNING "%s: Not enough memory, " + "dropping tx status", skb->dev->name); + /* should be dev_kfree_skb_irq, but due to this function being + * named _irqsafe instead of just _irq we can't be sure that + * people won't call it from non-irq contexts */ + dev_kfree_skb_any(skb); + return; + } + memcpy(saved, status, sizeof(struct ieee80211_tx_status)); + /* copy pointer to saved status into skb->cb for use by tasklet */ + memcpy(skb->cb, &saved, sizeof(saved)); + + skb->pkt_type = IEEE80211_TX_STATUS_MSG; + skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ? + &local->skb_queue : &local->skb_queue_unreliable, skb); + tmp = skb_queue_len(&local->skb_queue) + + skb_queue_len(&local->skb_queue_unreliable); + while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && + (skb = skb_dequeue(&local->skb_queue_unreliable))) { + memcpy(&saved, skb->cb, sizeof(saved)); + kfree(saved); + dev_kfree_skb_irq(skb); + tmp--; + I802_DEBUG_INC(local->tx_status_drop); + } + tasklet_schedule(&local->tasklet); +} +EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); + +static void ieee80211_tasklet_handler(unsigned long data) +{ + struct ieee80211_local *local = (struct ieee80211_local *) data; + struct sk_buff *skb; + struct ieee80211_rx_status rx_status; + struct ieee80211_tx_status *tx_status; + + while ((skb = skb_dequeue(&local->skb_queue)) || + (skb = skb_dequeue(&local->skb_queue_unreliable))) { + switch (skb->pkt_type) { + case IEEE80211_RX_MSG: + /* status is in skb->cb */ + memcpy(&rx_status, skb->cb, sizeof(rx_status)); + /* Clear skb->type in order to not confuse kernel + * netstack. */ + skb->pkt_type = 0; + __ieee80211_rx(local_to_hw(local), skb, &rx_status); + break; + case IEEE80211_TX_STATUS_MSG: + /* get pointer to saved status out of skb->cb */ + memcpy(&tx_status, skb->cb, sizeof(tx_status)); + skb->pkt_type = 0; + ieee80211_tx_status(local_to_hw(local), + skb, tx_status); + kfree(tx_status); + break; + default: /* should never get here! */ + printk(KERN_ERR "%s: Unknown message type (%d)\n", + local->mdev->name, skb->pkt_type); + dev_kfree_skb(skb); + break; + } + } +} + + +/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to + * make a prepared TX frame (one that has been given to hw) to look like brand + * new IEEE 802.11 frame that is ready to go through TX processing again. + * Also, tx_packet_data in cb is restored from tx_control. */ +static void ieee80211_remove_tx_extra(struct ieee80211_local *local, + struct ieee80211_key *key, + struct sk_buff *skb, + struct ieee80211_tx_control *control) +{ + int hdrlen, iv_len, mic_len; + struct ieee80211_tx_packet_data *pkt_data; + + pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; + pkt_data->ifindex = control->ifindex; + pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT); + pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS); + pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT); + pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE); + pkt_data->queue = control->queue; + + hdrlen = ieee80211_get_hdrlen_from_skb(skb); + + if (!key) + goto no_key; + + switch (key->alg) { + case ALG_WEP: + iv_len = WEP_IV_LEN; + mic_len = WEP_ICV_LEN; + break; + case ALG_TKIP: + iv_len = TKIP_IV_LEN; + mic_len = TKIP_ICV_LEN; + break; + case ALG_CCMP: + iv_len = CCMP_HDR_LEN; + mic_len = CCMP_MIC_LEN; + break; + default: + goto no_key; + } + + if (skb->len >= mic_len && key->force_sw_encrypt) + skb_trim(skb, skb->len - mic_len); + if (skb->len >= iv_len && skb->len > hdrlen) { + memmove(skb->data + iv_len, skb->data, hdrlen); + skb_pull(skb, iv_len); + } + +no_key: + { + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc = le16_to_cpu(hdr->frame_control); + if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { + fc &= ~IEEE80211_STYPE_QOS_DATA; + hdr->frame_control = cpu_to_le16(fc); + memmove(skb->data + 2, skb->data, hdrlen - 2); + skb_pull(skb, 2); + } + } +} + + +void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ieee80211_tx_status *status) +{ + struct sk_buff *skb2; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct ieee80211_local *local = hw_to_local(hw); + u16 frag, type; + u32 msg_type; + + if (!status) { + printk(KERN_ERR + "%s: ieee80211_tx_status called with NULL status\n", + local->mdev->name); + dev_kfree_skb(skb); + return; + } + + if (status->excessive_retries) { + struct sta_info *sta; + sta = sta_info_get(local, hdr->addr1); + if (sta) { + if (sta->flags & WLAN_STA_PS) { + /* The STA is in power save mode, so assume + * that this TX packet failed because of that. + */ + status->excessive_retries = 0; + status->flags |= IEEE80211_TX_STATUS_TX_FILTERED; + } + sta_info_put(sta); + } + } + + if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) { + struct sta_info *sta; + sta = sta_info_get(local, hdr->addr1); + if (sta) { + sta->tx_filtered_count++; + + /* Clear the TX filter mask for this STA when sending + * the next packet. If the STA went to power save mode, + * this will happen when it is waking up for the next + * time. */ + sta->clear_dst_mask = 1; + + /* TODO: Is the WLAN_STA_PS flag always set here or is + * the race between RX and TX status causing some + * packets to be filtered out before 80211.o gets an + * update for PS status? This seems to be the case, so + * no changes are likely to be needed. */ + if (sta->flags & WLAN_STA_PS && + skb_queue_len(&sta->tx_filtered) < + STA_MAX_TX_BUFFER) { + ieee80211_remove_tx_extra(local, sta->key, + skb, + &status->control); + skb_queue_tail(&sta->tx_filtered, skb); + } else if (!(sta->flags & WLAN_STA_PS) && + !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) { + /* Software retry the packet once */ + status->control.flags |= IEEE80211_TXCTL_REQUEUE; + ieee80211_remove_tx_extra(local, sta->key, + skb, + &status->control); + dev_queue_xmit(skb); + } else { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: dropped TX " + "filtered frame queue_len=%d " + "PS=%d @%lu\n", + local->mdev->name, + skb_queue_len( + &sta->tx_filtered), + !!(sta->flags & WLAN_STA_PS), + jiffies); + } + dev_kfree_skb(skb); + } + sta_info_put(sta); + return; + } + } else { + /* FIXME: STUPID to call this with both local and local->mdev */ + rate_control_tx_status(local, local->mdev, skb, status); + } + + ieee80211_led_tx(local, 0); + + /* SNMP counters + * Fragments are passed to low-level drivers as separate skbs, so these + * are actually fragments, not frames. Update frame counters only for + * the first fragment of the frame. */ + + frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; + type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; + + if (status->flags & IEEE80211_TX_STATUS_ACK) { + if (frag == 0) { + local->dot11TransmittedFrameCount++; + if (is_multicast_ether_addr(hdr->addr1)) + local->dot11MulticastTransmittedFrameCount++; + if (status->retry_count > 0) + local->dot11RetryCount++; + if (status->retry_count > 1) + local->dot11MultipleRetryCount++; + } + + /* This counter shall be incremented for an acknowledged MPDU + * with an individual address in the address 1 field or an MPDU + * with a multicast address in the address 1 field of type Data + * or Management. */ + if (!is_multicast_ether_addr(hdr->addr1) || + type == IEEE80211_FTYPE_DATA || + type == IEEE80211_FTYPE_MGMT) + local->dot11TransmittedFragmentCount++; + } else { + if (frag == 0) + local->dot11FailedCount++; + } + + if (!(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) + || unlikely(!local->apdev)) { + dev_kfree_skb(skb); + return; + } + + msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ? + ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail; + + /* skb was the original skb used for TX. Clone it and give the clone + * to netif_rx(). Free original skb. */ + skb2 = skb_copy(skb, GFP_ATOMIC); + if (!skb2) { + dev_kfree_skb(skb); + return; + } + dev_kfree_skb(skb); + skb = skb2; + + /* Send frame to hostapd */ + ieee80211_rx_mgmt(local, skb, NULL, msg_type); +} +EXPORT_SYMBOL(ieee80211_tx_status); + +/* TODO: implement register/unregister functions for adding TX/RX handlers + * into ordered list */ + +/* rx_pre handlers don't have dev and sdata fields available in + * ieee80211_txrx_data */ +static ieee80211_rx_handler ieee80211_rx_pre_handlers[] = +{ + ieee80211_rx_h_parse_qos, + ieee80211_rx_h_load_stats, + NULL +}; + +static ieee80211_rx_handler ieee80211_rx_handlers[] = +{ + ieee80211_rx_h_if_stats, + ieee80211_rx_h_monitor, + ieee80211_rx_h_passive_scan, + ieee80211_rx_h_check, + ieee80211_rx_h_sta_process, + ieee80211_rx_h_ccmp_decrypt, + ieee80211_rx_h_tkip_decrypt, + ieee80211_rx_h_wep_weak_iv_detection, + ieee80211_rx_h_wep_decrypt, + ieee80211_rx_h_defragment, + ieee80211_rx_h_ps_poll, + ieee80211_rx_h_michael_mic_verify, + /* this must be after decryption - so header is counted in MPDU mic + * must be before pae and data, so QOS_DATA format frames + * are not passed to user space by these functions + */ + ieee80211_rx_h_remove_qos_control, + ieee80211_rx_h_802_1x_pae, + ieee80211_rx_h_drop_unencrypted, + ieee80211_rx_h_data, + ieee80211_rx_h_mgmt, + NULL +}; + +static ieee80211_tx_handler ieee80211_tx_handlers[] = +{ + ieee80211_tx_h_check_assoc, + ieee80211_tx_h_sequence, + ieee80211_tx_h_ps_buf, + ieee80211_tx_h_select_key, + ieee80211_tx_h_michael_mic_add, + ieee80211_tx_h_fragment, + ieee80211_tx_h_tkip_encrypt, + ieee80211_tx_h_ccmp_encrypt, + ieee80211_tx_h_wep_encrypt, + ieee80211_tx_h_rate_ctrl, + ieee80211_tx_h_misc, + ieee80211_tx_h_load_stats, + NULL +}; + + +int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct sta_info *sta; + + if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) + return 0; + + /* Create STA entry for the new peer */ + sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); + if (!sta) + return -ENOMEM; + sta_info_put(sta); + + /* Remove STA entry for the old peer */ + sta = sta_info_get(local, sdata->u.wds.remote_addr); + if (sta) { + sta_info_put(sta); + sta_info_free(sta, 0); + } else { + printk(KERN_DEBUG "%s: could not find STA entry for WDS link " + "peer " MAC_FMT "\n", + dev->name, MAC_ARG(sdata->u.wds.remote_addr)); + } + + /* Update WDS link data */ + memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); + + return 0; +} + +/* Must not be called for mdev and apdev */ +void ieee80211_if_setup(struct net_device *dev) +{ + ether_setup(dev); + dev->hard_start_xmit = ieee80211_subif_start_xmit; + dev->wireless_handlers = &ieee80211_iw_handler_def; + dev->set_multicast_list = ieee80211_set_multicast_list; + dev->change_mtu = ieee80211_change_mtu; + dev->get_stats = ieee80211_get_stats; + dev->open = ieee80211_open; + dev->stop = ieee80211_stop; + dev->uninit = ieee80211_if_reinit; + dev->destructor = ieee80211_if_free; +} + +void ieee80211_if_mgmt_setup(struct net_device *dev) +{ + ether_setup(dev); + dev->hard_start_xmit = ieee80211_mgmt_start_xmit; + dev->change_mtu = ieee80211_change_mtu_apdev; + dev->get_stats = ieee80211_get_stats; + dev->open = ieee80211_mgmt_open; + dev->stop = ieee80211_mgmt_stop; + dev->type = ARPHRD_IEEE80211_PRISM; + dev->hard_header_parse = header_parse_80211; + dev->uninit = ieee80211_if_reinit; + dev->destructor = ieee80211_if_free; +} + +int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, + const char *name) +{ + struct rate_control_ref *ref, *old; + + ASSERT_RTNL(); + if (local->open_count || netif_running(local->mdev) || + (local->apdev && netif_running(local->apdev))) + return -EBUSY; + + ref = rate_control_alloc(name, local); + if (!ref) { + printk(KERN_WARNING "%s: Failed to select rate control " + "algorithm\n", local->mdev->name); + return -ENOENT; + } + + old = local->rate_ctrl; + local->rate_ctrl = ref; + if (old) { + rate_control_put(old); + sta_info_flush(local, NULL); + } + + printk(KERN_DEBUG "%s: Selected rate control " + "algorithm '%s'\n", local->mdev->name, + ref->ops->name); + + + return 0; +} + +static void rate_control_deinitialize(struct ieee80211_local *local) +{ + struct rate_control_ref *ref; + + ref = local->rate_ctrl; + local->rate_ctrl = NULL; + rate_control_put(ref); +} + +struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, + const struct ieee80211_ops *ops) +{ + struct net_device *mdev; + struct ieee80211_local *local; + struct ieee80211_sub_if_data *sdata; + int priv_size; + struct wiphy *wiphy; + + /* Ensure 32-byte alignment of our private data and hw private data. + * We use the wiphy priv data for both our ieee80211_local and for + * the driver's private data + * + * In memory it'll be like this: + * + * +-------------------------+ + * | struct wiphy | + * +-------------------------+ + * | struct ieee80211_local | + * +-------------------------+ + * | driver's private data | + * +-------------------------+ + * + */ + priv_size = ((sizeof(struct ieee80211_local) + + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + + priv_data_len; + + wiphy = wiphy_new(&mac80211_config_ops, priv_size); + + if (!wiphy) + return NULL; + + wiphy->privid = mac80211_wiphy_privid; + + local = wiphy_priv(wiphy); + local->hw.wiphy = wiphy; + + local->hw.priv = (char *)local + + ((sizeof(struct ieee80211_local) + + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); + + local->ops = ops; + + /* for now, mdev needs sub_if_data :/ */ + mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), + "wmaster%d", ether_setup); + if (!mdev) { + wiphy_free(wiphy); + return NULL; + } + + sdata = IEEE80211_DEV_TO_SUB_IF(mdev); + mdev->ieee80211_ptr = &sdata->wdev; + sdata->wdev.wiphy = wiphy; + + local->hw.queues = 1; /* default */ + + local->mdev = mdev; + local->rx_pre_handlers = ieee80211_rx_pre_handlers; + local->rx_handlers = ieee80211_rx_handlers; + local->tx_handlers = ieee80211_tx_handlers; + + local->bridge_packets = 1; + + local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; + local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; + local->short_retry_limit = 7; + local->long_retry_limit = 4; + local->hw.conf.radio_enabled = 1; + local->rate_ctrl_num_up = RATE_CONTROL_NUM_UP; + local->rate_ctrl_num_down = RATE_CONTROL_NUM_DOWN; + + local->enabled_modes = (unsigned int) -1; + + INIT_LIST_HEAD(&local->modes_list); + + rwlock_init(&local->sub_if_lock); + INIT_LIST_HEAD(&local->sub_if_list); + + INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); + init_timer(&local->stat_timer); + local->stat_timer.function = ieee80211_stat_refresh; + local->stat_timer.data = (unsigned long) local; + ieee80211_rx_bss_list_init(mdev); + + sta_info_init(local); + + mdev->hard_start_xmit = ieee80211_master_start_xmit; + mdev->open = ieee80211_master_open; + mdev->stop = ieee80211_master_stop; + mdev->type = ARPHRD_IEEE80211; + mdev->hard_header_parse = header_parse_80211; + + sdata->type = IEEE80211_IF_TYPE_AP; + sdata->dev = mdev; + sdata->local = local; + sdata->u.ap.force_unicast_rateidx = -1; + sdata->u.ap.max_ratectrl_rateidx = -1; + ieee80211_if_sdata_init(sdata); + list_add_tail(&sdata->list, &local->sub_if_list); + + tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, + (unsigned long)local); + tasklet_disable(&local->tx_pending_tasklet); + + tasklet_init(&local->tasklet, + ieee80211_tasklet_handler, + (unsigned long) local); + tasklet_disable(&local->tasklet); + + skb_queue_head_init(&local->skb_queue); + skb_queue_head_init(&local->skb_queue_unreliable); + + return local_to_hw(local); +} +EXPORT_SYMBOL(ieee80211_alloc_hw); + +int ieee80211_register_hw(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + const char *name; + int result; + + result = wiphy_register(local->hw.wiphy); + if (result < 0) + return result; + + name = wiphy_dev(local->hw.wiphy)->driver->name; + local->hw.workqueue = create_singlethread_workqueue(name); + if (!local->hw.workqueue) { + result = -ENOMEM; + goto fail_workqueue; + } + + local->hw.conf.beacon_int = 1000; + + local->wstats_flags |= local->hw.max_rssi ? + IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID; + local->wstats_flags |= local->hw.max_signal ? + IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; + local->wstats_flags |= local->hw.max_noise ? + IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; + if (local->hw.max_rssi < 0 || local->hw.max_noise < 0) + local->wstats_flags |= IW_QUAL_DBM; + + result = sta_info_start(local); + if (result < 0) + goto fail_sta_info; + + rtnl_lock(); + result = dev_alloc_name(local->mdev, local->mdev->name); + if (result < 0) + goto fail_dev; + + memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); + SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); + + result = register_netdevice(local->mdev); + if (result < 0) + goto fail_dev; + + result = ieee80211_init_rate_ctrl_alg(local, NULL); + if (result < 0) { + printk(KERN_DEBUG "%s: Failed to initialize rate control " + "algorithm\n", local->mdev->name); + goto fail_rate; + } + + result = ieee80211_wep_init(local); + + if (result < 0) { + printk(KERN_DEBUG "%s: Failed to initialize wep\n", + local->mdev->name); + goto fail_wep; + } + + ieee80211_install_qdisc(local->mdev); + + /* add one default STA interface */ + result = ieee80211_if_add(local->mdev, "wlan%d", NULL, + IEEE80211_IF_TYPE_STA); + if (result) + printk(KERN_WARNING "%s: Failed to add default virtual iface\n", + local->mdev->name); + + local->reg_state = IEEE80211_DEV_REGISTERED; + rtnl_unlock(); + + ieee80211_led_init(local); + + return 0; + +fail_wep: + rate_control_deinitialize(local); +fail_rate: + unregister_netdevice(local->mdev); +fail_dev: + rtnl_unlock(); + sta_info_stop(local); +fail_sta_info: + destroy_workqueue(local->hw.workqueue); +fail_workqueue: + wiphy_unregister(local->hw.wiphy); + return result; +} +EXPORT_SYMBOL(ieee80211_register_hw); + +int ieee80211_register_hwmode(struct ieee80211_hw *hw, + struct ieee80211_hw_mode *mode) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_rate *rate; + int i; + + INIT_LIST_HEAD(&mode->list); + list_add_tail(&mode->list, &local->modes_list); + + local->hw_modes |= (1 << mode->mode); + for (i = 0; i < mode->num_rates; i++) { + rate = &(mode->rates[i]); + rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate; + } + ieee80211_prepare_rates(local, mode); + + if (!local->oper_hw_mode) { + /* Default to this mode */ + local->hw.conf.phymode = mode->mode; + local->oper_hw_mode = local->scan_hw_mode = mode; + local->oper_channel = local->scan_channel = &mode->channels[0]; + local->hw.conf.mode = local->oper_hw_mode; + local->hw.conf.chan = local->oper_channel; + } + + if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED)) + ieee80211_init_client(local->mdev); + + return 0; +} +EXPORT_SYMBOL(ieee80211_register_hwmode); + +void ieee80211_unregister_hw(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct ieee80211_sub_if_data *sdata, *tmp; + struct list_head tmp_list; + int i; + + tasklet_kill(&local->tx_pending_tasklet); + tasklet_kill(&local->tasklet); + + rtnl_lock(); + + BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); + + local->reg_state = IEEE80211_DEV_UNREGISTERED; + if (local->apdev) + ieee80211_if_del_mgmt(local); + + write_lock_bh(&local->sub_if_lock); + list_replace_init(&local->sub_if_list, &tmp_list); + write_unlock_bh(&local->sub_if_lock); + + list_for_each_entry_safe(sdata, tmp, &tmp_list, list) + __ieee80211_if_del(local, sdata); + + rtnl_unlock(); + + if (local->stat_time) + del_timer_sync(&local->stat_timer); + + ieee80211_rx_bss_list_deinit(local->mdev); + ieee80211_clear_tx_pending(local); + sta_info_stop(local); + rate_control_deinitialize(local); + + for (i = 0; i < NUM_IEEE80211_MODES; i++) { + kfree(local->supp_rates[i]); + kfree(local->basic_rates[i]); + } + + if (skb_queue_len(&local->skb_queue) + || skb_queue_len(&local->skb_queue_unreliable)) + printk(KERN_WARNING "%s: skb_queue not empty\n", + local->mdev->name); + skb_queue_purge(&local->skb_queue); + skb_queue_purge(&local->skb_queue_unreliable); + + destroy_workqueue(local->hw.workqueue); + wiphy_unregister(local->hw.wiphy); + ieee80211_wep_free(local); + ieee80211_led_exit(local); +} +EXPORT_SYMBOL(ieee80211_unregister_hw); + +void ieee80211_free_hw(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + ieee80211_if_free(local->mdev); + wiphy_free(local->hw.wiphy); +} +EXPORT_SYMBOL(ieee80211_free_hw); + +void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) +{ + struct ieee80211_local *local = hw_to_local(hw); + + if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF, + &local->state[queue])) { + if (test_bit(IEEE80211_LINK_STATE_PENDING, + &local->state[queue])) + tasklet_schedule(&local->tx_pending_tasklet); + else + if (!ieee80211_qdisc_installed(local->mdev)) { + if (queue == 0) + netif_wake_queue(local->mdev); + } else + __netif_schedule(local->mdev); + } +} +EXPORT_SYMBOL(ieee80211_wake_queue); + +void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) +{ + struct ieee80211_local *local = hw_to_local(hw); + + if (!ieee80211_qdisc_installed(local->mdev) && queue == 0) + netif_stop_queue(local->mdev); + set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); +} +EXPORT_SYMBOL(ieee80211_stop_queue); + +void ieee80211_start_queues(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + int i; + + for (i = 0; i < local->hw.queues; i++) + clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]); + if (!ieee80211_qdisc_installed(local->mdev)) + netif_start_queue(local->mdev); +} +EXPORT_SYMBOL(ieee80211_start_queues); + +void ieee80211_stop_queues(struct ieee80211_hw *hw) +{ + int i; + + for (i = 0; i < hw->queues; i++) + ieee80211_stop_queue(hw, i); +} +EXPORT_SYMBOL(ieee80211_stop_queues); + +void ieee80211_wake_queues(struct ieee80211_hw *hw) +{ + int i; + + for (i = 0; i < hw->queues; i++) + ieee80211_wake_queue(hw, i); +} +EXPORT_SYMBOL(ieee80211_wake_queues); + +struct net_device_stats *ieee80211_dev_stats(struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + return &sdata->stats; +} + +static int __init ieee80211_init(void) +{ + struct sk_buff *skb; + int ret; + + BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); + + ret = ieee80211_wme_register(); + if (ret) { + printk(KERN_DEBUG "ieee80211_init: failed to " + "initialize WME (err=%d)\n", ret); + return ret; + } + + return 0; +} + + +static void __exit ieee80211_exit(void) +{ + ieee80211_wme_unregister(); +} + + +module_init(ieee80211_init); +module_exit(ieee80211_exit); + +MODULE_DESCRIPTION("IEEE 802.11 subsystem"); +MODULE_LICENSE("GPL"); diff --git a/net/mac80211/ieee80211_cfg.c b/net/mac80211/ieee80211_cfg.c new file mode 100644 index 00000000000..509096edb32 --- /dev/null +++ b/net/mac80211/ieee80211_cfg.c @@ -0,0 +1,66 @@ +/* + * mac80211 configuration hooks for cfg80211 + * + * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> + * + * This file is GPLv2 as found in COPYING. + */ + +#include <linux/nl80211.h> +#include <linux/rtnetlink.h> +#include <net/cfg80211.h> +#include "ieee80211_i.h" +#include "ieee80211_cfg.h" + +static int ieee80211_add_iface(struct wiphy *wiphy, char *name, + unsigned int type) +{ + struct ieee80211_local *local = wiphy_priv(wiphy); + int itype; + + if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) + return -ENODEV; + + switch (type) { + case NL80211_IFTYPE_UNSPECIFIED: + itype = IEEE80211_IF_TYPE_STA; + break; + case NL80211_IFTYPE_ADHOC: + itype = IEEE80211_IF_TYPE_IBSS; + break; + case NL80211_IFTYPE_STATION: + itype = IEEE80211_IF_TYPE_STA; + break; + case NL80211_IFTYPE_MONITOR: + itype = IEEE80211_IF_TYPE_MNTR; + break; + default: + return -EINVAL; + } + + return ieee80211_if_add(local->mdev, name, NULL, itype); +} + +static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex) +{ + struct ieee80211_local *local = wiphy_priv(wiphy); + struct net_device *dev; + char *name; + + if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) + return -ENODEV; + + dev = dev_get_by_index(ifindex); + if (!dev) + return 0; + + name = dev->name; + dev_put(dev); + + return ieee80211_if_remove(local->mdev, name, -1); +} + +struct cfg80211_ops mac80211_config_ops = { + .add_virtual_intf = ieee80211_add_iface, + .del_virtual_intf = ieee80211_del_iface, +}; diff --git a/net/mac80211/ieee80211_cfg.h b/net/mac80211/ieee80211_cfg.h new file mode 100644 index 00000000000..85ed2c92487 --- /dev/null +++ b/net/mac80211/ieee80211_cfg.h @@ -0,0 +1,9 @@ +/* + * mac80211 configuration hooks for cfg80211 + */ +#ifndef __IEEE80211_CFG_H +#define __IEEE80211_CFG_H + +extern struct cfg80211_ops mac80211_config_ops; + +#endif /* __IEEE80211_CFG_H */ diff --git a/net/mac80211/ieee80211_common.h b/net/mac80211/ieee80211_common.h new file mode 100644 index 00000000000..b9a73e7f5f7 --- /dev/null +++ b/net/mac80211/ieee80211_common.h @@ -0,0 +1,98 @@ +/* + * IEEE 802.11 driver (80211.o) -- hostapd interface + * Copyright 2002-2004, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef IEEE80211_COMMON_H +#define IEEE80211_COMMON_H + +#include <linux/types.h> + +/* + * This is common header information with user space. It is used on all + * frames sent to wlan#ap interface. + */ + +#define IEEE80211_FI_VERSION 0x80211001 + +struct ieee80211_frame_info { + __be32 version; + __be32 length; + __be64 mactime; + __be64 hosttime; + __be32 phytype; + __be32 channel; + __be32 datarate; + __be32 antenna; + __be32 priority; + __be32 ssi_type; + __be32 ssi_signal; + __be32 ssi_noise; + __be32 preamble; + __be32 encoding; + + /* Note: this structure is otherwise identical to capture format used + * in linux-wlan-ng, but this additional field is used to provide meta + * data about the frame to hostapd. This was the easiest method for + * providing this information, but this might change in the future. */ + __be32 msg_type; +} __attribute__ ((packed)); + + +enum ieee80211_msg_type { + ieee80211_msg_normal = 0, + ieee80211_msg_tx_callback_ack = 1, + ieee80211_msg_tx_callback_fail = 2, + ieee80211_msg_passive_scan = 3, + ieee80211_msg_wep_frame_unknown_key = 4, + ieee80211_msg_michael_mic_failure = 5, + /* hole at 6, was monitor but never sent to userspace */ + ieee80211_msg_sta_not_assoc = 7, + ieee80211_msg_set_aid_for_sta = 8 /* used by Intersil MVC driver */, + ieee80211_msg_key_threshold_notification = 9, + ieee80211_msg_radar = 11, +}; + +struct ieee80211_msg_set_aid_for_sta { + char sta_address[ETH_ALEN]; + u16 aid; +}; + +struct ieee80211_msg_key_notification { + int tx_rx_count; + char ifname[IFNAMSIZ]; + u8 addr[ETH_ALEN]; /* ff:ff:ff:ff:ff:ff for broadcast keys */ +}; + + +enum ieee80211_phytype { + ieee80211_phytype_fhss_dot11_97 = 1, + ieee80211_phytype_dsss_dot11_97 = 2, + ieee80211_phytype_irbaseband = 3, + ieee80211_phytype_dsss_dot11_b = 4, + ieee80211_phytype_pbcc_dot11_b = 5, + ieee80211_phytype_ofdm_dot11_g = 6, + ieee80211_phytype_pbcc_dot11_g = 7, + ieee80211_phytype_ofdm_dot11_a = 8, + ieee80211_phytype_dsss_dot11_turbog = 255, + ieee80211_phytype_dsss_dot11_turbo = 256, +}; + +enum ieee80211_ssi_type { + ieee80211_ssi_none = 0, + ieee80211_ssi_norm = 1, /* normalized, 0-1000 */ + ieee80211_ssi_dbm = 2, + ieee80211_ssi_raw = 3, /* raw SSI */ +}; + +struct ieee80211_radar_info { + int channel; + int radar; + int radar_type; +}; + +#endif /* IEEE80211_COMMON_H */ diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h new file mode 100644 index 00000000000..ae94d646179 --- /dev/null +++ b/net/mac80211/ieee80211_i.h @@ -0,0 +1,671 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef IEEE80211_I_H +#define IEEE80211_I_H + +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/if_ether.h> +#include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/workqueue.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <net/wireless.h> +#include "ieee80211_key.h" +#include "sta_info.h" + +/* ieee80211.o internal definitions, etc. These are not included into + * low-level drivers. */ + +#ifndef ETH_P_PAE +#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */ +#endif /* ETH_P_PAE */ + +#define WLAN_FC_DATA_PRESENT(fc) (((fc) & 0x4c) == 0x08) + +struct ieee80211_local; + +#define BIT(x) (1 << (x)) + +#define IEEE80211_ALIGN32_PAD(a) ((4 - ((a) & 3)) & 3) + +/* Maximum number of broadcast/multicast frames to buffer when some of the + * associated stations are using power saving. */ +#define AP_MAX_BC_BUFFER 128 + +/* Maximum number of frames buffered to all STAs, including multicast frames. + * Note: increasing this limit increases the potential memory requirement. Each + * frame can be up to about 2 kB long. */ +#define TOTAL_MAX_TX_BUFFER 512 + +/* Required encryption head and tailroom */ +#define IEEE80211_ENCRYPT_HEADROOM 8 +#define IEEE80211_ENCRYPT_TAILROOM 12 + +/* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent + * reception of at least three fragmented frames. This limit can be increased + * by changing this define, at the cost of slower frame reassembly and + * increased memory use (about 2 kB of RAM per entry). */ +#define IEEE80211_FRAGMENT_MAX 4 + +struct ieee80211_fragment_entry { + unsigned long first_frag_time; + unsigned int seq; + unsigned int rx_queue; + unsigned int last_frag; + unsigned int extra_len; + struct sk_buff_head skb_list; + int ccmp; /* Whether fragments were encrypted with CCMP */ + u8 last_pn[6]; /* PN of the last fragment if CCMP was used */ +}; + + +struct ieee80211_sta_bss { + struct list_head list; + struct ieee80211_sta_bss *hnext; + atomic_t users; + + u8 bssid[ETH_ALEN]; + u8 ssid[IEEE80211_MAX_SSID_LEN]; + size_t ssid_len; + u16 capability; /* host byte order */ + int hw_mode; + int channel; + int freq; + int rssi, signal, noise; + u8 *wpa_ie; + size_t wpa_ie_len; + u8 *rsn_ie; + size_t rsn_ie_len; + u8 *wmm_ie; + size_t wmm_ie_len; +#define IEEE80211_MAX_SUPP_RATES 32 + u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; + size_t supp_rates_len; + int beacon_int; + u64 timestamp; + + int probe_resp; + unsigned long last_update; + +}; + + +typedef enum { + TXRX_CONTINUE, TXRX_DROP, TXRX_QUEUED +} ieee80211_txrx_result; + +struct ieee80211_txrx_data { + struct sk_buff *skb; + struct net_device *dev; + struct ieee80211_local *local; + struct ieee80211_sub_if_data *sdata; + struct sta_info *sta; + u16 fc, ethertype; + struct ieee80211_key *key; + unsigned int fragmented:1; /* whether the MSDU was fragmented */ + union { + struct { + struct ieee80211_tx_control *control; + unsigned int unicast:1; + unsigned int ps_buffered:1; + unsigned int short_preamble:1; + unsigned int probe_last_frag:1; + struct ieee80211_hw_mode *mode; + struct ieee80211_rate *rate; + /* use this rate (if set) for last fragment; rate can + * be set to lower rate for the first fragments, e.g., + * when using CTS protection with IEEE 802.11g. */ + struct ieee80211_rate *last_frag_rate; + int last_frag_hwrate; + int mgmt_interface; + + /* Extra fragments (in addition to the first fragment + * in skb) */ + int num_extra_frag; + struct sk_buff **extra_frag; + } tx; + struct { + struct ieee80211_rx_status *status; + int sent_ps_buffered; + int queue; + int load; + unsigned int in_scan:1; + /* frame is destined to interface currently processed + * (including multicast frames) */ + unsigned int ra_match:1; + } rx; + } u; +}; + +/* Stored in sk_buff->cb */ +struct ieee80211_tx_packet_data { + int ifindex; + unsigned long jiffies; + unsigned int req_tx_status:1; + unsigned int do_not_encrypt:1; + unsigned int requeue:1; + unsigned int mgmt_iface:1; + unsigned int queue:4; +}; + +struct ieee80211_tx_stored_packet { + struct ieee80211_tx_control control; + struct sk_buff *skb; + int num_extra_frag; + struct sk_buff **extra_frag; + int last_frag_rateidx; + int last_frag_hwrate; + struct ieee80211_rate *last_frag_rate; + unsigned int last_frag_rate_ctrl_probe:1; +}; + +typedef ieee80211_txrx_result (*ieee80211_tx_handler) +(struct ieee80211_txrx_data *tx); + +typedef ieee80211_txrx_result (*ieee80211_rx_handler) +(struct ieee80211_txrx_data *rx); + +struct ieee80211_if_ap { + u8 *beacon_head, *beacon_tail; + int beacon_head_len, beacon_tail_len; + + u8 ssid[IEEE80211_MAX_SSID_LEN]; + size_t ssid_len; + u8 *generic_elem; + size_t generic_elem_len; + + /* yes, this looks ugly, but guarantees that we can later use + * bitmap_empty :) + * NB: don't ever use set_bit, use bss_tim_set/bss_tim_clear! */ + u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]; + atomic_t num_sta_ps; /* number of stations in PS mode */ + struct sk_buff_head ps_bc_buf; + int dtim_period, dtim_count; + int force_unicast_rateidx; /* forced TX rateidx for unicast frames */ + int max_ratectrl_rateidx; /* max TX rateidx for rate control */ + int num_beacons; /* number of TXed beacon frames for this BSS */ +}; + +struct ieee80211_if_wds { + u8 remote_addr[ETH_ALEN]; + struct sta_info *sta; +}; + +struct ieee80211_if_vlan { + u8 id; +}; + +struct ieee80211_if_sta { + enum { + IEEE80211_DISABLED, IEEE80211_AUTHENTICATE, + IEEE80211_ASSOCIATE, IEEE80211_ASSOCIATED, + IEEE80211_IBSS_SEARCH, IEEE80211_IBSS_JOINED + } state; + struct timer_list timer; + struct work_struct work; + u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; + u8 ssid[IEEE80211_MAX_SSID_LEN]; + size_t ssid_len; + u16 aid; + u16 ap_capab, capab; + u8 *extra_ie; /* to be added to the end of AssocReq */ + size_t extra_ie_len; + + /* The last AssocReq/Resp IEs */ + u8 *assocreq_ies, *assocresp_ies; + size_t assocreq_ies_len, assocresp_ies_len; + + int auth_tries, assoc_tries; + + unsigned int ssid_set:1; + unsigned int bssid_set:1; + unsigned int prev_bssid_set:1; + unsigned int authenticated:1; + unsigned int associated:1; + unsigned int probereq_poll:1; + unsigned int use_protection:1; + unsigned int create_ibss:1; + unsigned int mixed_cell:1; + unsigned int wmm_enabled:1; + unsigned int auto_ssid_sel:1; + unsigned int auto_bssid_sel:1; + unsigned int auto_channel_sel:1; +#define IEEE80211_STA_REQ_SCAN 0 +#define IEEE80211_STA_REQ_AUTH 1 +#define IEEE80211_STA_REQ_RUN 2 + unsigned long request; + struct sk_buff_head skb_queue; + + int key_mgmt; + unsigned long last_probe; + +#define IEEE80211_AUTH_ALG_OPEN BIT(0) +#define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1) +#define IEEE80211_AUTH_ALG_LEAP BIT(2) + unsigned int auth_algs; /* bitfield of allowed auth algs */ + int auth_alg; /* currently used IEEE 802.11 authentication algorithm */ + int auth_transaction; + + unsigned long ibss_join_req; + struct sk_buff *probe_resp; /* ProbeResp template for IBSS */ + u32 supp_rates_bits; + + int wmm_last_param_set; +}; + + +struct ieee80211_sub_if_data { + struct list_head list; + unsigned int type; + + struct wireless_dev wdev; + + struct net_device *dev; + struct ieee80211_local *local; + + int mc_count; + unsigned int allmulti:1; + unsigned int promisc:1; + + struct net_device_stats stats; + int drop_unencrypted; + int eapol; /* 0 = process EAPOL frames as normal data frames, + * 1 = send EAPOL frames through wlan#ap to hostapd + * (default) */ + int ieee802_1x; /* IEEE 802.1X PAE - drop packet to/from unauthorized + * port */ + + u16 sequence; + + /* Fragment table for host-based reassembly */ + struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX]; + unsigned int fragment_next; + +#define NUM_DEFAULT_KEYS 4 + struct ieee80211_key *keys[NUM_DEFAULT_KEYS]; + struct ieee80211_key *default_key; + + struct ieee80211_if_ap *bss; /* BSS that this device belongs to */ + + union { + struct ieee80211_if_ap ap; + struct ieee80211_if_wds wds; + struct ieee80211_if_vlan vlan; + struct ieee80211_if_sta sta; + } u; + int channel_use; + int channel_use_raw; +}; + +#define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev) + +enum { + IEEE80211_RX_MSG = 1, + IEEE80211_TX_STATUS_MSG = 2, +}; + +struct ieee80211_local { + /* embed the driver visible part. + * don't cast (use the static inlines below), but we keep + * it first anyway so they become a no-op */ + struct ieee80211_hw hw; + + const struct ieee80211_ops *ops; + + /* List of registered struct ieee80211_hw_mode */ + struct list_head modes_list; + + struct net_device *mdev; /* wmaster# - "master" 802.11 device */ + struct net_device *apdev; /* wlan#ap - management frames (hostapd) */ + int open_count; + int monitors; + struct iw_statistics wstats; + u8 wstats_flags; + + enum { + IEEE80211_DEV_UNINITIALIZED = 0, + IEEE80211_DEV_REGISTERED, + IEEE80211_DEV_UNREGISTERED, + } reg_state; + + /* Tasklet and skb queue to process calls from IRQ mode. All frames + * added to skb_queue will be processed, but frames in + * skb_queue_unreliable may be dropped if the total length of these + * queues increases over the limit. */ +#define IEEE80211_IRQSAFE_QUEUE_LIMIT 128 + struct tasklet_struct tasklet; + struct sk_buff_head skb_queue; + struct sk_buff_head skb_queue_unreliable; + + /* Station data structures */ + spinlock_t sta_lock; /* mutex for STA data structures */ + int num_sta; /* number of stations in sta_list */ + struct list_head sta_list; + struct list_head deleted_sta_list; + struct sta_info *sta_hash[STA_HASH_SIZE]; + struct timer_list sta_cleanup; + + unsigned long state[NUM_TX_DATA_QUEUES]; + struct ieee80211_tx_stored_packet pending_packet[NUM_TX_DATA_QUEUES]; + struct tasklet_struct tx_pending_tasklet; + + int mc_count; /* total count of multicast entries in all interfaces */ + int iff_allmultis, iff_promiscs; + /* number of interfaces with corresponding IFF_ flags */ + + struct rate_control_ref *rate_ctrl; + + int next_mode; /* MODE_IEEE80211* + * The mode preference for next channel change. This is + * used to select .11g vs. .11b channels (or 4.9 GHz vs. + * .11a) when the channel number is not unique. */ + + /* Supported and basic rate filters for different modes. These are + * pointers to -1 terminated lists and rates in 100 kbps units. */ + int *supp_rates[NUM_IEEE80211_MODES]; + int *basic_rates[NUM_IEEE80211_MODES]; + + int rts_threshold; + int cts_protect_erp_frames; + int fragmentation_threshold; + int short_retry_limit; /* dot11ShortRetryLimit */ + int long_retry_limit; /* dot11LongRetryLimit */ + int short_preamble; /* use short preamble with IEEE 802.11b */ + + struct crypto_blkcipher *wep_tx_tfm; + struct crypto_blkcipher *wep_rx_tfm; + u32 wep_iv; + int key_tx_rx_threshold; /* number of times any key can be used in TX + * or RX before generating a rekey + * notification; 0 = notification disabled. */ + + int bridge_packets; /* bridge packets between associated stations and + * deliver multicast frames both back to wireless + * media and to the local net stack */ + + ieee80211_rx_handler *rx_pre_handlers; + ieee80211_rx_handler *rx_handlers; + ieee80211_tx_handler *tx_handlers; + + rwlock_t sub_if_lock; /* Protects sub_if_list. Cannot be taken under + * sta_bss_lock or sta_lock. */ + struct list_head sub_if_list; + int sta_scanning; + int scan_channel_idx; + enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state; + unsigned long last_scan_completed; + struct delayed_work scan_work; + struct net_device *scan_dev; + struct ieee80211_channel *oper_channel, *scan_channel; + struct ieee80211_hw_mode *oper_hw_mode, *scan_hw_mode; + u8 scan_ssid[IEEE80211_MAX_SSID_LEN]; + size_t scan_ssid_len; + struct list_head sta_bss_list; + struct ieee80211_sta_bss *sta_bss_hash[STA_HASH_SIZE]; + spinlock_t sta_bss_lock; +#define IEEE80211_SCAN_MATCH_SSID BIT(0) +#define IEEE80211_SCAN_WPA_ONLY BIT(1) +#define IEEE80211_SCAN_EXTRA_INFO BIT(2) + int scan_flags; + + /* SNMP counters */ + /* dot11CountersTable */ + u32 dot11TransmittedFragmentCount; + u32 dot11MulticastTransmittedFrameCount; + u32 dot11FailedCount; + u32 dot11RetryCount; + u32 dot11MultipleRetryCount; + u32 dot11FrameDuplicateCount; + u32 dot11ReceivedFragmentCount; + u32 dot11MulticastReceivedFrameCount; + u32 dot11TransmittedFrameCount; + u32 dot11WEPUndecryptableCount; + +#ifdef CONFIG_MAC80211_LEDS + int tx_led_counter, rx_led_counter; + struct led_trigger *tx_led, *rx_led; + char tx_led_name[32], rx_led_name[32]; +#endif + + u32 channel_use; + u32 channel_use_raw; + u32 stat_time; + struct timer_list stat_timer; + + enum { + STA_ANTENNA_SEL_AUTO = 0, + STA_ANTENNA_SEL_SW_CTRL = 1, + STA_ANTENNA_SEL_SW_CTRL_DEBUG = 2 + } sta_antenna_sel; + + int rate_ctrl_num_up, rate_ctrl_num_down; + +#ifdef CONFIG_MAC80211_DEBUG_COUNTERS + /* TX/RX handler statistics */ + unsigned int tx_handlers_drop; + unsigned int tx_handlers_queued; + unsigned int tx_handlers_drop_unencrypted; + unsigned int tx_handlers_drop_fragment; + unsigned int tx_handlers_drop_wep; + unsigned int tx_handlers_drop_not_assoc; + unsigned int tx_handlers_drop_unauth_port; + unsigned int rx_handlers_drop; + unsigned int rx_handlers_queued; + unsigned int rx_handlers_drop_nullfunc; + unsigned int rx_handlers_drop_defrag; + unsigned int rx_handlers_drop_short; + unsigned int rx_handlers_drop_passive_scan; + unsigned int tx_expand_skb_head; + unsigned int tx_expand_skb_head_cloned; + unsigned int rx_expand_skb_head; + unsigned int rx_expand_skb_head2; + unsigned int rx_handlers_fragments; + unsigned int tx_status_drop; + unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES]; + unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES]; +#define I802_DEBUG_INC(c) (c)++ +#else /* CONFIG_MAC80211_DEBUG_COUNTERS */ +#define I802_DEBUG_INC(c) do { } while (0) +#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */ + + + int default_wep_only; /* only default WEP keys are used with this + * interface; this is used to decide when hwaccel + * can be used with default keys */ + int total_ps_buffered; /* total number of all buffered unicast and + * multicast packets for power saving stations + */ + int allow_broadcast_always; /* whether to allow TX of broadcast frames + * even when there are no associated STAs + */ + + int wifi_wme_noack_test; + unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */ + + unsigned int enabled_modes; /* bitfield of allowed modes; + * (1 << MODE_*) */ + unsigned int hw_modes; /* bitfield of supported hardware modes; + * (1 << MODE_*) */ + + int user_space_mlme; +}; + +static inline struct ieee80211_local *hw_to_local( + struct ieee80211_hw *hw) +{ + return container_of(hw, struct ieee80211_local, hw); +} + +static inline struct ieee80211_hw *local_to_hw( + struct ieee80211_local *local) +{ + return &local->hw; +} + +enum ieee80211_link_state_t { + IEEE80211_LINK_STATE_XOFF = 0, + IEEE80211_LINK_STATE_PENDING, +}; + +struct sta_attribute { + struct attribute attr; + ssize_t (*show)(const struct sta_info *, char *buf); + ssize_t (*store)(struct sta_info *, const char *buf, size_t count); +}; + +static inline void __bss_tim_set(struct ieee80211_if_ap *bss, int aid) +{ + /* + * This format has ben mandated by the IEEE specifications, + * so this line may not be changed to use the __set_bit() format. + */ + bss->tim[(aid)/8] |= 1<<((aid) % 8); +} + +static inline void bss_tim_set(struct ieee80211_local *local, + struct ieee80211_if_ap *bss, int aid) +{ + spin_lock_bh(&local->sta_lock); + __bss_tim_set(bss, aid); + spin_unlock_bh(&local->sta_lock); +} + +static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, int aid) +{ + /* + * This format has ben mandated by the IEEE specifications, + * so this line may not be changed to use the __clear_bit() format. + */ + bss->tim[(aid)/8] &= !(1<<((aid) % 8)); +} + +static inline void bss_tim_clear(struct ieee80211_local *local, + struct ieee80211_if_ap *bss, int aid) +{ + spin_lock_bh(&local->sta_lock); + __bss_tim_clear(bss, aid); + spin_unlock_bh(&local->sta_lock); +} + +/** + * ieee80211_is_erp_rate - Check if a rate is an ERP rate + * @phymode: The PHY-mode for this rate (MODE_IEEE80211...) + * @rate: Transmission rate to check, in 100 kbps + * + * Check if a given rate is an Extended Rate PHY (ERP) rate. + */ +static inline int ieee80211_is_erp_rate(int phymode, int rate) +{ + if (phymode == MODE_IEEE80211G) { + if (rate != 10 && rate != 20 && + rate != 55 && rate != 110) + return 1; + } + return 0; +} + +/* ieee80211.c */ +int ieee80211_hw_config(struct ieee80211_local *local); +int ieee80211_if_config(struct net_device *dev); +int ieee80211_if_config_beacon(struct net_device *dev); +struct ieee80211_key_conf * +ieee80211_key_data2conf(struct ieee80211_local *local, + const struct ieee80211_key *data); +struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata, + int idx, size_t key_len, gfp_t flags); +void ieee80211_key_free(struct ieee80211_key *key); +void ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_rx_status *status, u32 msg_type); +void ieee80211_prepare_rates(struct ieee80211_local *local, + struct ieee80211_hw_mode *mode); +void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx); +int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr); +void ieee80211_if_setup(struct net_device *dev); +void ieee80211_if_mgmt_setup(struct net_device *dev); +int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, + const char *name); +struct net_device_stats *ieee80211_dev_stats(struct net_device *dev); + +/* ieee80211_ioctl.c */ +extern const struct iw_handler_def ieee80211_iw_handler_def; + +void ieee80211_update_default_wep_only(struct ieee80211_local *local); + + +/* Least common multiple of the used rates (in 100 kbps). This is used to + * calculate rate_inv values for each rate so that only integers are needed. */ +#define CHAN_UTIL_RATE_LCM 95040 +/* 1 usec is 1/8 * (95040/10) = 1188 */ +#define CHAN_UTIL_PER_USEC 1188 +/* Amount of bits to shift the result right to scale the total utilization + * to values that will not wrap around 32-bit integers. */ +#define CHAN_UTIL_SHIFT 9 +/* Theoretical maximum of channel utilization counter in 10 ms (stat_time=1): + * (CHAN_UTIL_PER_USEC * 10000) >> CHAN_UTIL_SHIFT = 23203. So dividing the + * raw value with about 23 should give utilization in 10th of a percentage + * (1/1000). However, utilization is only estimated and not all intervals + * between frames etc. are calculated. 18 seems to give numbers that are closer + * to the real maximum. */ +#define CHAN_UTIL_PER_10MS 18 +#define CHAN_UTIL_HDR_LONG (202 * CHAN_UTIL_PER_USEC) +#define CHAN_UTIL_HDR_SHORT (40 * CHAN_UTIL_PER_USEC) + + +/* ieee80211_ioctl.c */ +int ieee80211_set_compression(struct ieee80211_local *local, + struct net_device *dev, struct sta_info *sta); +int ieee80211_init_client(struct net_device *dev); +int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq); +/* ieee80211_sta.c */ +void ieee80211_sta_timer(unsigned long data); +void ieee80211_sta_work(struct work_struct *work); +void ieee80211_sta_scan_work(struct work_struct *work); +void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, + struct ieee80211_rx_status *rx_status); +int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len); +int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len); +int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid); +int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len); +void ieee80211_sta_req_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta); +int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len); +void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, + struct ieee80211_rx_status *rx_status); +void ieee80211_rx_bss_list_init(struct net_device *dev); +void ieee80211_rx_bss_list_deinit(struct net_device *dev); +int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len); +struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, + struct sk_buff *skb, u8 *bssid, + u8 *addr); +int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason); +int ieee80211_sta_disassociate(struct net_device *dev, u16 reason); + +/* ieee80211_iface.c */ +int ieee80211_if_add(struct net_device *dev, const char *name, + struct net_device **new_dev, int type); +void ieee80211_if_set_type(struct net_device *dev, int type); +void ieee80211_if_reinit(struct net_device *dev); +void __ieee80211_if_del(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata); +int ieee80211_if_remove(struct net_device *dev, const char *name, int id); +void ieee80211_if_free(struct net_device *dev); +void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata); +int ieee80211_if_add_mgmt(struct ieee80211_local *local); +void ieee80211_if_del_mgmt(struct ieee80211_local *local); + +/* for wiphy privid */ +extern void *mac80211_wiphy_privid; + +#endif /* IEEE80211_I_H */ diff --git a/net/mac80211/ieee80211_iface.c b/net/mac80211/ieee80211_iface.c new file mode 100644 index 00000000000..64267d4b31a --- /dev/null +++ b/net/mac80211/ieee80211_iface.c @@ -0,0 +1,344 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005-2006, Devicescape Software, Inc. + * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/kernel.h> +#include <linux/if_arp.h> +#include <linux/netdevice.h> +#include <linux/rtnetlink.h> +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "sta_info.h" + +void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata) +{ + int i; + + /* Default values for sub-interface parameters */ + sdata->drop_unencrypted = 0; + sdata->eapol = 1; + for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) + skb_queue_head_init(&sdata->fragments[i].skb_list); +} + +static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) +{ + int i; + + for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { + __skb_queue_purge(&sdata->fragments[i].skb_list); + } +} + +/* Must be called with rtnl lock held. */ +int ieee80211_if_add(struct net_device *dev, const char *name, + struct net_device **new_dev, int type) +{ + struct net_device *ndev; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = NULL; + int ret; + + ASSERT_RTNL(); + ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), + name, ieee80211_if_setup); + if (!ndev) + return -ENOMEM; + + ret = dev_alloc_name(ndev, ndev->name); + if (ret < 0) + goto fail; + + memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); + ndev->base_addr = dev->base_addr; + ndev->irq = dev->irq; + ndev->mem_start = dev->mem_start; + ndev->mem_end = dev->mem_end; + SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); + + sdata = IEEE80211_DEV_TO_SUB_IF(ndev); + ndev->ieee80211_ptr = &sdata->wdev; + sdata->wdev.wiphy = local->hw.wiphy; + sdata->type = IEEE80211_IF_TYPE_AP; + sdata->dev = ndev; + sdata->local = local; + ieee80211_if_sdata_init(sdata); + + ret = register_netdevice(ndev); + if (ret) + goto fail; + + ieee80211_if_set_type(ndev, type); + + write_lock_bh(&local->sub_if_lock); + if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { + write_unlock_bh(&local->sub_if_lock); + __ieee80211_if_del(local, sdata); + return -ENODEV; + } + list_add(&sdata->list, &local->sub_if_list); + if (new_dev) + *new_dev = ndev; + write_unlock_bh(&local->sub_if_lock); + + ieee80211_update_default_wep_only(local); + + return 0; + +fail: + free_netdev(ndev); + return ret; +} + +int ieee80211_if_add_mgmt(struct ieee80211_local *local) +{ + struct net_device *ndev; + struct ieee80211_sub_if_data *nsdata; + int ret; + + ASSERT_RTNL(); + + ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d", + ieee80211_if_mgmt_setup); + if (!ndev) + return -ENOMEM; + ret = dev_alloc_name(ndev, ndev->name); + if (ret < 0) + goto fail; + + memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); + SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); + + nsdata = IEEE80211_DEV_TO_SUB_IF(ndev); + ndev->ieee80211_ptr = &nsdata->wdev; + nsdata->wdev.wiphy = local->hw.wiphy; + nsdata->type = IEEE80211_IF_TYPE_MGMT; + nsdata->dev = ndev; + nsdata->local = local; + ieee80211_if_sdata_init(nsdata); + + ret = register_netdevice(ndev); + if (ret) + goto fail; + + if (local->open_count > 0) + dev_open(ndev); + local->apdev = ndev; + return 0; + +fail: + free_netdev(ndev); + return ret; +} + +void ieee80211_if_del_mgmt(struct ieee80211_local *local) +{ + struct net_device *apdev; + + ASSERT_RTNL(); + apdev = local->apdev; + local->apdev = NULL; + unregister_netdevice(apdev); +} + +void ieee80211_if_set_type(struct net_device *dev, int type) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + sdata->type = type; + switch (type) { + case IEEE80211_IF_TYPE_WDS: + sdata->bss = NULL; + break; + case IEEE80211_IF_TYPE_VLAN: + break; + case IEEE80211_IF_TYPE_AP: + sdata->u.ap.dtim_period = 2; + sdata->u.ap.force_unicast_rateidx = -1; + sdata->u.ap.max_ratectrl_rateidx = -1; + skb_queue_head_init(&sdata->u.ap.ps_bc_buf); + sdata->bss = &sdata->u.ap; + break; + case IEEE80211_IF_TYPE_STA: + case IEEE80211_IF_TYPE_IBSS: { + struct ieee80211_sub_if_data *msdata; + struct ieee80211_if_sta *ifsta; + + ifsta = &sdata->u.sta; + INIT_WORK(&ifsta->work, ieee80211_sta_work); + setup_timer(&ifsta->timer, ieee80211_sta_timer, + (unsigned long) sdata); + skb_queue_head_init(&ifsta->skb_queue); + + ifsta->capab = WLAN_CAPABILITY_ESS; + ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | + IEEE80211_AUTH_ALG_SHARED_KEY; + ifsta->create_ibss = 1; + ifsta->wmm_enabled = 1; + ifsta->auto_channel_sel = 1; + ifsta->auto_bssid_sel = 1; + + msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); + sdata->bss = &msdata->u.ap; + break; + } + case IEEE80211_IF_TYPE_MNTR: + dev->type = ARPHRD_IEEE80211_RADIOTAP; + break; + default: + printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", + dev->name, __FUNCTION__, type); + } + ieee80211_update_default_wep_only(local); +} + +/* Must be called with rtnl lock held. */ +void ieee80211_if_reinit(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct sta_info *sta; + int i; + + ASSERT_RTNL(); + ieee80211_if_sdata_deinit(sdata); + for (i = 0; i < NUM_DEFAULT_KEYS; i++) { + if (!sdata->keys[i]) + continue; +#if 0 + /* The interface is down at the moment, so there is not + * really much point in disabling the keys at this point. */ + memset(addr, 0xff, ETH_ALEN); + if (local->ops->set_key) + local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr, + local->keys[i], 0); +#endif + ieee80211_key_free(sdata->keys[i]); + sdata->keys[i] = NULL; + } + + switch (sdata->type) { + case IEEE80211_IF_TYPE_AP: { + /* Remove all virtual interfaces that use this BSS + * as their sdata->bss */ + struct ieee80211_sub_if_data *tsdata, *n; + LIST_HEAD(tmp_list); + + write_lock_bh(&local->sub_if_lock); + list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) { + if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { + printk(KERN_DEBUG "%s: removing virtual " + "interface %s because its BSS interface" + " is being removed\n", + sdata->dev->name, tsdata->dev->name); + list_move_tail(&tsdata->list, &tmp_list); + } + } + write_unlock_bh(&local->sub_if_lock); + + list_for_each_entry_safe(tsdata, n, &tmp_list, list) + __ieee80211_if_del(local, tsdata); + + kfree(sdata->u.ap.beacon_head); + kfree(sdata->u.ap.beacon_tail); + kfree(sdata->u.ap.generic_elem); + + if (dev != local->mdev) { + struct sk_buff *skb; + while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { + local->total_ps_buffered--; + dev_kfree_skb(skb); + } + } + + break; + } + case IEEE80211_IF_TYPE_WDS: + sta = sta_info_get(local, sdata->u.wds.remote_addr); + if (sta) { + sta_info_put(sta); + sta_info_free(sta, 0); + } else { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: Someone had deleted my STA " + "entry for the WDS link\n", dev->name); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + } + break; + case IEEE80211_IF_TYPE_STA: + case IEEE80211_IF_TYPE_IBSS: + kfree(sdata->u.sta.extra_ie); + sdata->u.sta.extra_ie = NULL; + kfree(sdata->u.sta.assocreq_ies); + sdata->u.sta.assocreq_ies = NULL; + kfree(sdata->u.sta.assocresp_ies); + sdata->u.sta.assocresp_ies = NULL; + if (sdata->u.sta.probe_resp) { + dev_kfree_skb(sdata->u.sta.probe_resp); + sdata->u.sta.probe_resp = NULL; + } + + break; + case IEEE80211_IF_TYPE_MNTR: + dev->type = ARPHRD_ETHER; + break; + } + + /* remove all STAs that are bound to this virtual interface */ + sta_info_flush(local, dev); + + memset(&sdata->u, 0, sizeof(sdata->u)); + ieee80211_if_sdata_init(sdata); +} + +/* Must be called with rtnl lock held. */ +void __ieee80211_if_del(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata) +{ + struct net_device *dev = sdata->dev; + + unregister_netdevice(dev); + /* Except master interface, the net_device will be freed by + * net_device->destructor (i. e. ieee80211_if_free). */ +} + +/* Must be called with rtnl lock held. */ +int ieee80211_if_remove(struct net_device *dev, const char *name, int id) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata, *n; + + ASSERT_RTNL(); + + write_lock_bh(&local->sub_if_lock); + list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) { + if ((sdata->type == id || id == -1) && + strcmp(name, sdata->dev->name) == 0 && + sdata->dev != local->mdev) { + list_del(&sdata->list); + write_unlock_bh(&local->sub_if_lock); + __ieee80211_if_del(local, sdata); + ieee80211_update_default_wep_only(local); + return 0; + } + } + write_unlock_bh(&local->sub_if_lock); + return -ENODEV; +} + +void ieee80211_if_free(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + /* local->apdev must be NULL when freeing management interface */ + BUG_ON(dev == local->apdev); + ieee80211_if_sdata_deinit(sdata); + free_netdev(dev); +} diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c new file mode 100644 index 00000000000..73909ec85f2 --- /dev/null +++ b/net/mac80211/ieee80211_ioctl.c @@ -0,0 +1,1806 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005-2006, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/etherdevice.h> +#include <linux/if_arp.h> +#include <linux/wireless.h> +#include <net/iw_handler.h> +#include <asm/uaccess.h> + +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "hostapd_ioctl.h" +#include "ieee80211_rate.h" +#include "wpa.h" +#include "aes_ccm.h" + +static int ieee80211_regdom = 0x10; /* FCC */ +module_param(ieee80211_regdom, int, 0444); +MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain; 64=MKK"); + +/* + * If firmware is upgraded by the vendor, additional channels can be used based + * on the new Japanese regulatory rules. This is indicated by setting + * ieee80211_japan_5ghz module parameter to one when loading the 80211 kernel + * module. + */ +static int ieee80211_japan_5ghz /* = 0 */; +module_param(ieee80211_japan_5ghz, int, 0444); +MODULE_PARM_DESC(ieee80211_japan_5ghz, "Vendor-updated firmware for 5 GHz"); + +static void ieee80211_set_hw_encryption(struct net_device *dev, + struct sta_info *sta, u8 addr[ETH_ALEN], + struct ieee80211_key *key) +{ + struct ieee80211_key_conf *keyconf = NULL; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + /* default to sw encryption; this will be cleared by low-level + * driver if the hw supports requested encryption */ + if (key) + key->force_sw_encrypt = 1; + + if (key && local->ops->set_key && + (keyconf = ieee80211_key_data2conf(local, key))) { + if (local->ops->set_key(local_to_hw(local), SET_KEY, addr, + keyconf, sta ? sta->aid : 0)) { + key->force_sw_encrypt = 1; + key->hw_key_idx = HW_KEY_IDX_INVALID; + } else { + key->force_sw_encrypt = + !!(keyconf->flags & IEEE80211_KEY_FORCE_SW_ENCRYPT); + key->hw_key_idx = + keyconf->hw_key_idx; + + } + } + kfree(keyconf); +} + + +static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr, + int idx, int alg, int set_tx_key, + const u8 *_key, size_t key_len) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + int ret = 0; + struct sta_info *sta; + struct ieee80211_key *key, *old_key; + int try_hwaccel = 1; + struct ieee80211_key_conf *keyconf; + struct ieee80211_sub_if_data *sdata; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (is_broadcast_ether_addr(sta_addr)) { + sta = NULL; + if (idx >= NUM_DEFAULT_KEYS) { + printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d\n", + dev->name, idx); + return -EINVAL; + } + key = sdata->keys[idx]; + + /* TODO: consider adding hwaccel support for these; at least + * Atheros key cache should be able to handle this since AP is + * only transmitting frames with default keys. */ + /* FIX: hw key cache can be used when only one virtual + * STA is associated with each AP. If more than one STA + * is associated to the same AP, software encryption + * must be used. This should be done automatically + * based on configured station devices. For the time + * being, this can be only set at compile time. */ + } else { + set_tx_key = 0; + if (idx != 0) { + printk(KERN_DEBUG "%s: set_encrypt - non-zero idx for " + "individual key\n", dev->name); + return -EINVAL; + } + + sta = sta_info_get(local, sta_addr); + if (!sta) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: set_encrypt - unknown addr " + MAC_FMT "\n", + dev->name, MAC_ARG(sta_addr)); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + + return -ENOENT; + } + + key = sta->key; + } + + /* FIX: + * Cannot configure default hwaccel keys with WEP algorithm, if + * any of the virtual interfaces is using static WEP + * configuration because hwaccel would otherwise try to decrypt + * these frames. + * + * For now, just disable WEP hwaccel for broadcast when there is + * possibility of conflict with default keys. This can maybe later be + * optimized by using non-default keys (at least with Atheros ar521x). + */ + if (!sta && alg == ALG_WEP && !local->default_wep_only && + sdata->type != IEEE80211_IF_TYPE_IBSS && + sdata->type != IEEE80211_IF_TYPE_AP) { + try_hwaccel = 0; + } + + if (local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) { + /* Software encryption cannot be used with devices that hide + * encryption from the host system, so always try to use + * hardware acceleration with such devices. */ + try_hwaccel = 1; + } + + if ((local->hw.flags & IEEE80211_HW_NO_TKIP_WMM_HWACCEL) && + alg == ALG_TKIP) { + if (sta && (sta->flags & WLAN_STA_WME)) { + /* Hardware does not support hwaccel with TKIP when using WMM. + */ + try_hwaccel = 0; + } + else if (sdata->type == IEEE80211_IF_TYPE_STA) { + sta = sta_info_get(local, sdata->u.sta.bssid); + if (sta) { + if (sta->flags & WLAN_STA_WME) { + try_hwaccel = 0; + } + sta_info_put(sta); + sta = NULL; + } + } + } + + if (alg == ALG_NONE) { + keyconf = NULL; + if (try_hwaccel && key && + key->hw_key_idx != HW_KEY_IDX_INVALID && + local->ops->set_key && + (keyconf = ieee80211_key_data2conf(local, key)) != NULL && + local->ops->set_key(local_to_hw(local), DISABLE_KEY, + sta_addr, keyconf, sta ? sta->aid : 0)) { + printk(KERN_DEBUG "%s: set_encrypt - low-level disable" + " failed\n", dev->name); + ret = -EINVAL; + } + kfree(keyconf); + + if (set_tx_key || sdata->default_key == key) + sdata->default_key = NULL; + if (sta) + sta->key = NULL; + else + sdata->keys[idx] = NULL; + ieee80211_key_free(key); + key = NULL; + } else { + old_key = key; + key = ieee80211_key_alloc(sta ? NULL : sdata, idx, key_len, + GFP_KERNEL); + if (!key) { + ret = -ENOMEM; + goto err_out; + } + + /* default to sw encryption; low-level driver sets these if the + * requested encryption is supported */ + key->hw_key_idx = HW_KEY_IDX_INVALID; + key->force_sw_encrypt = 1; + + key->alg = alg; + key->keyidx = idx; + key->keylen = key_len; + memcpy(key->key, _key, key_len); + if (set_tx_key) + key->default_tx_key = 1; + + if (alg == ALG_CCMP) { + /* Initialize AES key state here as an optimization + * so that it does not need to be initialized for every + * packet. */ + key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt( + key->key); + if (!key->u.ccmp.tfm) { + ret = -ENOMEM; + goto err_free; + } + } + + if (set_tx_key || sdata->default_key == old_key) + sdata->default_key = NULL; + if (sta) + sta->key = key; + else + sdata->keys[idx] = key; + ieee80211_key_free(old_key); + + if (try_hwaccel && + (alg == ALG_WEP || alg == ALG_TKIP || alg == ALG_CCMP)) + ieee80211_set_hw_encryption(dev, sta, sta_addr, key); + } + + if (set_tx_key || (!sta && !sdata->default_key && key)) { + sdata->default_key = key; + + if (local->ops->set_key_idx && + local->ops->set_key_idx(local_to_hw(local), idx)) + printk(KERN_DEBUG "%s: failed to set TX key idx for " + "low-level driver\n", dev->name); + } + + if (sta) + sta_info_put(sta); + + return 0; + +err_free: + ieee80211_key_free(key); +err_out: + if (sta) + sta_info_put(sta); + return ret; +} + +static int ieee80211_ioctl_siwgenie(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (local->user_space_mlme) + return -EOPNOTSUPP; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + int ret = ieee80211_sta_set_extra_ie(dev, extra, data->length); + if (ret) + return ret; + sdata->u.sta.auto_bssid_sel = 0; + ieee80211_sta_req_auth(dev, &sdata->u.sta); + return 0; + } + + if (sdata->type == IEEE80211_IF_TYPE_AP) { + kfree(sdata->u.ap.generic_elem); + sdata->u.ap.generic_elem = kmalloc(data->length, GFP_KERNEL); + if (!sdata->u.ap.generic_elem) + return -ENOMEM; + memcpy(sdata->u.ap.generic_elem, extra, data->length); + sdata->u.ap.generic_elem_len = data->length; + return ieee80211_if_config(dev); + } + return -EOPNOTSUPP; +} + +static int ieee80211_ioctl_set_radio_enabled(struct net_device *dev, + int val) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_conf *conf = &local->hw.conf; + + conf->radio_enabled = val; + return ieee80211_hw_config(wdev_priv(dev->ieee80211_ptr)); +} + +static int ieee80211_ioctl_giwname(struct net_device *dev, + struct iw_request_info *info, + char *name, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + switch (local->hw.conf.phymode) { + case MODE_IEEE80211A: + strcpy(name, "IEEE 802.11a"); + break; + case MODE_IEEE80211B: + strcpy(name, "IEEE 802.11b"); + break; + case MODE_IEEE80211G: + strcpy(name, "IEEE 802.11g"); + break; + case MODE_ATHEROS_TURBO: + strcpy(name, "5GHz Turbo"); + break; + default: + strcpy(name, "IEEE 802.11"); + break; + } + + return 0; +} + + +static int ieee80211_ioctl_giwrange(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct iw_range *range = (struct iw_range *) extra; + + data->length = sizeof(struct iw_range); + memset(range, 0, sizeof(struct iw_range)); + + range->we_version_compiled = WIRELESS_EXT; + range->we_version_source = 21; + range->retry_capa = IW_RETRY_LIMIT; + range->retry_flags = IW_RETRY_LIMIT; + range->min_retry = 0; + range->max_retry = 255; + range->min_rts = 0; + range->max_rts = 2347; + range->min_frag = 256; + range->max_frag = 2346; + + range->encoding_size[0] = 5; + range->encoding_size[1] = 13; + range->num_encoding_sizes = 2; + range->max_encoding_tokens = NUM_DEFAULT_KEYS; + + range->max_qual.qual = local->hw.max_signal; + range->max_qual.level = local->hw.max_rssi; + range->max_qual.noise = local->hw.max_noise; + range->max_qual.updated = local->wstats_flags; + + range->avg_qual.qual = local->hw.max_signal/2; + range->avg_qual.level = 0; + range->avg_qual.noise = 0; + range->avg_qual.updated = local->wstats_flags; + + range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 | + IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP; + + IW_EVENT_CAPA_SET_KERNEL(range->event_capa); + IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWTHRSPY); + IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP); + IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN); + + return 0; +} + + +struct ieee80211_channel_range { + short start_freq; + short end_freq; + unsigned char power_level; + unsigned char antenna_max; +}; + +static const struct ieee80211_channel_range ieee80211_fcc_channels[] = { + { 2412, 2462, 27, 6 } /* IEEE 802.11b/g, channels 1..11 */, + { 5180, 5240, 17, 6 } /* IEEE 802.11a, channels 36..48 */, + { 5260, 5320, 23, 6 } /* IEEE 802.11a, channels 52..64 */, + { 5745, 5825, 30, 6 } /* IEEE 802.11a, channels 149..165, outdoor */, + { 0 } +}; + +static const struct ieee80211_channel_range ieee80211_mkk_channels[] = { + { 2412, 2472, 20, 6 } /* IEEE 802.11b/g, channels 1..13 */, + { 5170, 5240, 20, 6 } /* IEEE 802.11a, channels 34..48 */, + { 5260, 5320, 20, 6 } /* IEEE 802.11a, channels 52..64 */, + { 0 } +}; + + +static const struct ieee80211_channel_range *channel_range = + ieee80211_fcc_channels; + + +static void ieee80211_unmask_channel(struct net_device *dev, int mode, + struct ieee80211_channel *chan) +{ + int i; + + chan->flag = 0; + + if (ieee80211_regdom == 64 && + (mode == MODE_ATHEROS_TURBO || mode == MODE_ATHEROS_TURBOG)) { + /* Do not allow Turbo modes in Japan. */ + return; + } + + for (i = 0; channel_range[i].start_freq; i++) { + const struct ieee80211_channel_range *r = &channel_range[i]; + if (r->start_freq <= chan->freq && r->end_freq >= chan->freq) { + if (ieee80211_regdom == 64 && !ieee80211_japan_5ghz && + chan->freq >= 5260 && chan->freq <= 5320) { + /* + * Skip new channels in Japan since the + * firmware was not marked having been upgraded + * by the vendor. + */ + continue; + } + + if (ieee80211_regdom == 0x10 && + (chan->freq == 5190 || chan->freq == 5210 || + chan->freq == 5230)) { + /* Skip MKK channels when in FCC domain. */ + continue; + } + + chan->flag |= IEEE80211_CHAN_W_SCAN | + IEEE80211_CHAN_W_ACTIVE_SCAN | + IEEE80211_CHAN_W_IBSS; + chan->power_level = r->power_level; + chan->antenna_max = r->antenna_max; + + if (ieee80211_regdom == 64 && + (chan->freq == 5170 || chan->freq == 5190 || + chan->freq == 5210 || chan->freq == 5230)) { + /* + * New regulatory rules in Japan have backwards + * compatibility with old channels in 5.15-5.25 + * GHz band, but the station is not allowed to + * use active scan on these old channels. + */ + chan->flag &= ~IEEE80211_CHAN_W_ACTIVE_SCAN; + } + + if (ieee80211_regdom == 64 && + (chan->freq == 5260 || chan->freq == 5280 || + chan->freq == 5300 || chan->freq == 5320)) { + /* + * IBSS is not allowed on 5.25-5.35 GHz band + * due to radar detection requirements. + */ + chan->flag &= ~IEEE80211_CHAN_W_IBSS; + } + + break; + } + } +} + + +static int ieee80211_unmask_channels(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw_mode *mode; + int c; + + list_for_each_entry(mode, &local->modes_list, list) { + for (c = 0; c < mode->num_channels; c++) { + ieee80211_unmask_channel(dev, mode->mode, + &mode->channels[c]); + } + } + return 0; +} + + +int ieee80211_init_client(struct net_device *dev) +{ + if (ieee80211_regdom == 0x40) + channel_range = ieee80211_mkk_channels; + ieee80211_unmask_channels(dev); + return 0; +} + + +static int ieee80211_ioctl_siwmode(struct net_device *dev, + struct iw_request_info *info, + __u32 *mode, char *extra) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + int type; + + if (sdata->type == IEEE80211_IF_TYPE_VLAN) + return -EOPNOTSUPP; + + switch (*mode) { + case IW_MODE_INFRA: + type = IEEE80211_IF_TYPE_STA; + break; + case IW_MODE_ADHOC: + type = IEEE80211_IF_TYPE_IBSS; + break; + case IW_MODE_MONITOR: + type = IEEE80211_IF_TYPE_MNTR; + break; + default: + return -EINVAL; + } + + if (type == sdata->type) + return 0; + if (netif_running(dev)) + return -EBUSY; + + ieee80211_if_reinit(dev); + ieee80211_if_set_type(dev, type); + + return 0; +} + + +static int ieee80211_ioctl_giwmode(struct net_device *dev, + struct iw_request_info *info, + __u32 *mode, char *extra) +{ + struct ieee80211_sub_if_data *sdata; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + switch (sdata->type) { + case IEEE80211_IF_TYPE_AP: + *mode = IW_MODE_MASTER; + break; + case IEEE80211_IF_TYPE_STA: + *mode = IW_MODE_INFRA; + break; + case IEEE80211_IF_TYPE_IBSS: + *mode = IW_MODE_ADHOC; + break; + case IEEE80211_IF_TYPE_MNTR: + *mode = IW_MODE_MONITOR; + break; + case IEEE80211_IF_TYPE_WDS: + *mode = IW_MODE_REPEAT; + break; + case IEEE80211_IF_TYPE_VLAN: + *mode = IW_MODE_SECOND; /* FIXME */ + break; + default: + *mode = IW_MODE_AUTO; + break; + } + return 0; +} + +int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq) +{ + struct ieee80211_hw_mode *mode; + int c, set = 0; + int ret = -EINVAL; + + list_for_each_entry(mode, &local->modes_list, list) { + if (!(local->enabled_modes & (1 << mode->mode))) + continue; + for (c = 0; c < mode->num_channels; c++) { + struct ieee80211_channel *chan = &mode->channels[c]; + if (chan->flag & IEEE80211_CHAN_W_SCAN && + ((chan->chan == channel) || (chan->freq == freq))) { + /* Use next_mode as the mode preference to + * resolve non-unique channel numbers. */ + if (set && mode->mode != local->next_mode) + continue; + + local->oper_channel = chan; + local->oper_hw_mode = mode; + set++; + } + } + } + + if (set) { + if (local->sta_scanning) + ret = 0; + else + ret = ieee80211_hw_config(local); + + rate_control_clear(local); + } + + return ret; +} + +static int ieee80211_ioctl_siwfreq(struct net_device *dev, + struct iw_request_info *info, + struct iw_freq *freq, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (sdata->type == IEEE80211_IF_TYPE_STA) + sdata->u.sta.auto_channel_sel = 0; + + /* freq->e == 0: freq->m = channel; otherwise freq = m * 10^e */ + if (freq->e == 0) { + if (freq->m < 0) { + if (sdata->type == IEEE80211_IF_TYPE_STA) + sdata->u.sta.auto_channel_sel = 1; + return 0; + } else + return ieee80211_set_channel(local, freq->m, -1); + } else { + int i, div = 1000000; + for (i = 0; i < freq->e; i++) + div /= 10; + if (div > 0) + return ieee80211_set_channel(local, -1, freq->m / div); + else + return -EINVAL; + } +} + + +static int ieee80211_ioctl_giwfreq(struct net_device *dev, + struct iw_request_info *info, + struct iw_freq *freq, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + /* TODO: in station mode (Managed/Ad-hoc) might need to poll low-level + * driver for the current channel with firmware-based management */ + + freq->m = local->hw.conf.freq; + freq->e = 6; + + return 0; +} + + +static int ieee80211_ioctl_siwessid(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *ssid) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + size_t len = data->length; + + /* iwconfig uses nul termination in SSID.. */ + if (len > 0 && ssid[len - 1] == '\0') + len--; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + int ret; + if (local->user_space_mlme) { + if (len > IEEE80211_MAX_SSID_LEN) + return -EINVAL; + memcpy(sdata->u.sta.ssid, ssid, len); + sdata->u.sta.ssid_len = len; + return 0; + } + sdata->u.sta.auto_ssid_sel = !data->flags; + ret = ieee80211_sta_set_ssid(dev, ssid, len); + if (ret) + return ret; + ieee80211_sta_req_auth(dev, &sdata->u.sta); + return 0; + } + + if (sdata->type == IEEE80211_IF_TYPE_AP) { + memcpy(sdata->u.ap.ssid, ssid, len); + memset(sdata->u.ap.ssid + len, 0, + IEEE80211_MAX_SSID_LEN - len); + sdata->u.ap.ssid_len = len; + return ieee80211_if_config(dev); + } + return -EOPNOTSUPP; +} + + +static int ieee80211_ioctl_giwessid(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *ssid) +{ + size_t len; + + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + int res = ieee80211_sta_get_ssid(dev, ssid, &len); + if (res == 0) { + data->length = len; + data->flags = 1; + } else + data->flags = 0; + return res; + } + + if (sdata->type == IEEE80211_IF_TYPE_AP) { + len = sdata->u.ap.ssid_len; + if (len > IW_ESSID_MAX_SIZE) + len = IW_ESSID_MAX_SIZE; + memcpy(ssid, sdata->u.ap.ssid, len); + data->length = len; + data->flags = 1; + return 0; + } + return -EOPNOTSUPP; +} + + +static int ieee80211_ioctl_siwap(struct net_device *dev, + struct iw_request_info *info, + struct sockaddr *ap_addr, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + int ret; + if (local->user_space_mlme) { + memcpy(sdata->u.sta.bssid, (u8 *) &ap_addr->sa_data, + ETH_ALEN); + return 0; + } + if (is_zero_ether_addr((u8 *) &ap_addr->sa_data)) { + sdata->u.sta.auto_bssid_sel = 1; + sdata->u.sta.auto_channel_sel = 1; + } else if (is_broadcast_ether_addr((u8 *) &ap_addr->sa_data)) + sdata->u.sta.auto_bssid_sel = 1; + else + sdata->u.sta.auto_bssid_sel = 0; + ret = ieee80211_sta_set_bssid(dev, (u8 *) &ap_addr->sa_data); + if (ret) + return ret; + ieee80211_sta_req_auth(dev, &sdata->u.sta); + return 0; + } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { + if (memcmp(sdata->u.wds.remote_addr, (u8 *) &ap_addr->sa_data, + ETH_ALEN) == 0) + return 0; + return ieee80211_if_update_wds(dev, (u8 *) &ap_addr->sa_data); + } + + return -EOPNOTSUPP; +} + + +static int ieee80211_ioctl_giwap(struct net_device *dev, + struct iw_request_info *info, + struct sockaddr *ap_addr, char *extra) +{ + struct ieee80211_sub_if_data *sdata; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + ap_addr->sa_family = ARPHRD_ETHER; + memcpy(&ap_addr->sa_data, sdata->u.sta.bssid, ETH_ALEN); + return 0; + } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { + ap_addr->sa_family = ARPHRD_ETHER; + memcpy(&ap_addr->sa_data, sdata->u.wds.remote_addr, ETH_ALEN); + return 0; + } + + return -EOPNOTSUPP; +} + + +static int ieee80211_ioctl_siwscan(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + u8 *ssid = NULL; + size_t ssid_len = 0; + + if (!netif_running(dev)) + return -ENETDOWN; + + if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID) { + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) { + ssid = sdata->u.sta.ssid; + ssid_len = sdata->u.sta.ssid_len; + } else if (sdata->type == IEEE80211_IF_TYPE_AP) { + ssid = sdata->u.ap.ssid; + ssid_len = sdata->u.ap.ssid_len; + } else + return -EINVAL; + } + return ieee80211_sta_req_scan(dev, ssid, ssid_len); +} + + +static int ieee80211_ioctl_giwscan(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra) +{ + int res; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + if (local->sta_scanning) + return -EAGAIN; + res = ieee80211_sta_scan_results(dev, extra, data->length); + if (res >= 0) { + data->length = res; + return 0; + } + data->length = 0; + return res; +} + + +static int ieee80211_ioctl_siwrts(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *rts, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (rts->disabled) + local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; + else if (rts->value < 0 || rts->value > IEEE80211_MAX_RTS_THRESHOLD) + return -EINVAL; + else + local->rts_threshold = rts->value; + + /* If the wlan card performs RTS/CTS in hardware/firmware, + * configure it here */ + + if (local->ops->set_rts_threshold) + local->ops->set_rts_threshold(local_to_hw(local), + local->rts_threshold); + + return 0; +} + +static int ieee80211_ioctl_giwrts(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *rts, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + rts->value = local->rts_threshold; + rts->disabled = (rts->value >= IEEE80211_MAX_RTS_THRESHOLD); + rts->fixed = 1; + + return 0; +} + + +static int ieee80211_ioctl_siwfrag(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *frag, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (frag->disabled) + local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; + else if (frag->value < 256 || + frag->value > IEEE80211_MAX_FRAG_THRESHOLD) + return -EINVAL; + else { + /* Fragment length must be even, so strip LSB. */ + local->fragmentation_threshold = frag->value & ~0x1; + } + + /* If the wlan card performs fragmentation in hardware/firmware, + * configure it here */ + + if (local->ops->set_frag_threshold) + local->ops->set_frag_threshold( + local_to_hw(local), + local->fragmentation_threshold); + + return 0; +} + +static int ieee80211_ioctl_giwfrag(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *frag, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + frag->value = local->fragmentation_threshold; + frag->disabled = (frag->value >= IEEE80211_MAX_RTS_THRESHOLD); + frag->fixed = 1; + + return 0; +} + + +static int ieee80211_ioctl_siwretry(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *retry, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (retry->disabled || + (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT) + return -EINVAL; + + if (retry->flags & IW_RETRY_MAX) + local->long_retry_limit = retry->value; + else if (retry->flags & IW_RETRY_MIN) + local->short_retry_limit = retry->value; + else { + local->long_retry_limit = retry->value; + local->short_retry_limit = retry->value; + } + + if (local->ops->set_retry_limit) { + return local->ops->set_retry_limit( + local_to_hw(local), + local->short_retry_limit, + local->long_retry_limit); + } + + return 0; +} + + +static int ieee80211_ioctl_giwretry(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *retry, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + retry->disabled = 0; + if (retry->flags == 0 || retry->flags & IW_RETRY_MIN) { + /* first return min value, iwconfig will ask max value + * later if needed */ + retry->flags |= IW_RETRY_LIMIT; + retry->value = local->short_retry_limit; + if (local->long_retry_limit != local->short_retry_limit) + retry->flags |= IW_RETRY_MIN; + return 0; + } + if (retry->flags & IW_RETRY_MAX) { + retry->flags = IW_RETRY_LIMIT | IW_RETRY_MAX; + retry->value = local->long_retry_limit; + } + + return 0; +} + +static int ieee80211_ioctl_clear_keys(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_key_conf key; + int i; + u8 addr[ETH_ALEN]; + struct ieee80211_key_conf *keyconf; + struct ieee80211_sub_if_data *sdata; + struct sta_info *sta; + + memset(addr, 0xff, ETH_ALEN); + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + for (i = 0; i < NUM_DEFAULT_KEYS; i++) { + keyconf = NULL; + if (sdata->keys[i] && + !sdata->keys[i]->force_sw_encrypt && + local->ops->set_key && + (keyconf = ieee80211_key_data2conf(local, + sdata->keys[i]))) + local->ops->set_key(local_to_hw(local), + DISABLE_KEY, addr, + keyconf, 0); + kfree(keyconf); + ieee80211_key_free(sdata->keys[i]); + sdata->keys[i] = NULL; + } + sdata->default_key = NULL; + } + read_unlock(&local->sub_if_lock); + + spin_lock_bh(&local->sta_lock); + list_for_each_entry(sta, &local->sta_list, list) { + keyconf = NULL; + if (sta->key && !sta->key->force_sw_encrypt && + local->ops->set_key && + (keyconf = ieee80211_key_data2conf(local, sta->key))) + local->ops->set_key(local_to_hw(local), DISABLE_KEY, + sta->addr, keyconf, sta->aid); + kfree(keyconf); + ieee80211_key_free(sta->key); + sta->key = NULL; + } + spin_unlock_bh(&local->sta_lock); + + memset(&key, 0, sizeof(key)); + if (local->ops->set_key && + local->ops->set_key(local_to_hw(local), REMOVE_ALL_KEYS, + NULL, &key, 0)) + printk(KERN_DEBUG "%s: failed to remove hwaccel keys\n", + dev->name); + + return 0; +} + + +static int +ieee80211_ioctl_force_unicast_rate(struct net_device *dev, + struct ieee80211_sub_if_data *sdata, + int rate) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw_mode *mode; + int i; + + if (sdata->type != IEEE80211_IF_TYPE_AP) + return -ENOENT; + + if (rate == 0) { + sdata->u.ap.force_unicast_rateidx = -1; + return 0; + } + + mode = local->oper_hw_mode; + for (i = 0; i < mode->num_rates; i++) { + if (mode->rates[i].rate == rate) { + sdata->u.ap.force_unicast_rateidx = i; + return 0; + } + } + return -EINVAL; +} + + +static int +ieee80211_ioctl_max_ratectrl_rate(struct net_device *dev, + struct ieee80211_sub_if_data *sdata, + int rate) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw_mode *mode; + int i; + + if (sdata->type != IEEE80211_IF_TYPE_AP) + return -ENOENT; + + if (rate == 0) { + sdata->u.ap.max_ratectrl_rateidx = -1; + return 0; + } + + mode = local->oper_hw_mode; + for (i = 0; i < mode->num_rates; i++) { + if (mode->rates[i].rate == rate) { + sdata->u.ap.max_ratectrl_rateidx = i; + return 0; + } + } + return -EINVAL; +} + + +static void ieee80211_key_enable_hwaccel(struct ieee80211_local *local, + struct ieee80211_key *key) +{ + struct ieee80211_key_conf *keyconf; + u8 addr[ETH_ALEN]; + + if (!key || key->alg != ALG_WEP || !key->force_sw_encrypt || + (local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)) + return; + + memset(addr, 0xff, ETH_ALEN); + keyconf = ieee80211_key_data2conf(local, key); + if (keyconf && local->ops->set_key && + local->ops->set_key(local_to_hw(local), + SET_KEY, addr, keyconf, 0) == 0) { + key->force_sw_encrypt = + !!(keyconf->flags & IEEE80211_KEY_FORCE_SW_ENCRYPT); + key->hw_key_idx = keyconf->hw_key_idx; + } + kfree(keyconf); +} + + +static void ieee80211_key_disable_hwaccel(struct ieee80211_local *local, + struct ieee80211_key *key) +{ + struct ieee80211_key_conf *keyconf; + u8 addr[ETH_ALEN]; + + if (!key || key->alg != ALG_WEP || key->force_sw_encrypt || + (local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP)) + return; + + memset(addr, 0xff, ETH_ALEN); + keyconf = ieee80211_key_data2conf(local, key); + if (keyconf && local->ops->set_key) + local->ops->set_key(local_to_hw(local), DISABLE_KEY, + addr, keyconf, 0); + kfree(keyconf); + key->force_sw_encrypt = 1; +} + + +static int ieee80211_ioctl_default_wep_only(struct ieee80211_local *local, + int value) +{ + int i; + struct ieee80211_sub_if_data *sdata; + + local->default_wep_only = value; + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) + for (i = 0; i < NUM_DEFAULT_KEYS; i++) + if (value) + ieee80211_key_enable_hwaccel(local, + sdata->keys[i]); + else + ieee80211_key_disable_hwaccel(local, + sdata->keys[i]); + read_unlock(&local->sub_if_lock); + + return 0; +} + + +void ieee80211_update_default_wep_only(struct ieee80211_local *local) +{ + int i = 0; + struct ieee80211_sub_if_data *sdata; + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + + if (sdata->dev == local->mdev) + continue; + + /* If there is an AP interface then depend on userspace to + set default_wep_only correctly. */ + if (sdata->type == IEEE80211_IF_TYPE_AP) { + read_unlock(&local->sub_if_lock); + return; + } + + i++; + } + + read_unlock(&local->sub_if_lock); + + if (i <= 1) + ieee80211_ioctl_default_wep_only(local, 1); + else + ieee80211_ioctl_default_wep_only(local, 0); +} + + +static int ieee80211_ioctl_prism2_param(struct net_device *dev, + struct iw_request_info *info, + void *wrqu, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + int *i = (int *) extra; + int param = *i; + int value = *(i + 1); + int ret = 0; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + switch (param) { + case PRISM2_PARAM_IEEE_802_1X: + if (local->ops->set_ieee8021x) + ret = local->ops->set_ieee8021x(local_to_hw(local), + value); + if (ret) + printk(KERN_DEBUG "%s: failed to set IEEE 802.1X (%d) " + "for low-level driver\n", dev->name, value); + else + sdata->ieee802_1x = value; + break; + + case PRISM2_PARAM_ANTSEL_TX: + local->hw.conf.antenna_sel_tx = value; + if (ieee80211_hw_config(local)) + ret = -EINVAL; + break; + + case PRISM2_PARAM_ANTSEL_RX: + local->hw.conf.antenna_sel_rx = value; + if (ieee80211_hw_config(local)) + ret = -EINVAL; + break; + + case PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES: + local->cts_protect_erp_frames = value; + break; + + case PRISM2_PARAM_DROP_UNENCRYPTED: + sdata->drop_unencrypted = value; + break; + + case PRISM2_PARAM_PREAMBLE: + local->short_preamble = value; + break; + + case PRISM2_PARAM_STAT_TIME: + if (!local->stat_time && value) { + local->stat_timer.expires = jiffies + HZ * value / 100; + add_timer(&local->stat_timer); + } else if (local->stat_time && !value) { + del_timer_sync(&local->stat_timer); + } + local->stat_time = value; + break; + case PRISM2_PARAM_SHORT_SLOT_TIME: + if (value) + local->hw.conf.flags |= IEEE80211_CONF_SHORT_SLOT_TIME; + else + local->hw.conf.flags &= ~IEEE80211_CONF_SHORT_SLOT_TIME; + if (ieee80211_hw_config(local)) + ret = -EINVAL; + break; + + case PRISM2_PARAM_NEXT_MODE: + local->next_mode = value; + break; + + case PRISM2_PARAM_CLEAR_KEYS: + ret = ieee80211_ioctl_clear_keys(dev); + break; + + case PRISM2_PARAM_RADIO_ENABLED: + ret = ieee80211_ioctl_set_radio_enabled(dev, value); + break; + + case PRISM2_PARAM_ANTENNA_MODE: + local->hw.conf.antenna_mode = value; + if (ieee80211_hw_config(local)) + ret = -EINVAL; + break; + + case PRISM2_PARAM_STA_ANTENNA_SEL: + local->sta_antenna_sel = value; + break; + + case PRISM2_PARAM_FORCE_UNICAST_RATE: + ret = ieee80211_ioctl_force_unicast_rate(dev, sdata, value); + break; + + case PRISM2_PARAM_MAX_RATECTRL_RATE: + ret = ieee80211_ioctl_max_ratectrl_rate(dev, sdata, value); + break; + + case PRISM2_PARAM_RATE_CTRL_NUM_UP: + local->rate_ctrl_num_up = value; + break; + + case PRISM2_PARAM_RATE_CTRL_NUM_DOWN: + local->rate_ctrl_num_down = value; + break; + + case PRISM2_PARAM_TX_POWER_REDUCTION: + if (value < 0) + ret = -EINVAL; + else + local->hw.conf.tx_power_reduction = value; + break; + + case PRISM2_PARAM_KEY_TX_RX_THRESHOLD: + local->key_tx_rx_threshold = value; + break; + + case PRISM2_PARAM_DEFAULT_WEP_ONLY: + ret = ieee80211_ioctl_default_wep_only(local, value); + break; + + case PRISM2_PARAM_WIFI_WME_NOACK_TEST: + local->wifi_wme_noack_test = value; + break; + + case PRISM2_PARAM_SCAN_FLAGS: + local->scan_flags = value; + break; + + case PRISM2_PARAM_MIXED_CELL: + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) + ret = -EINVAL; + else + sdata->u.sta.mixed_cell = !!value; + break; + + case PRISM2_PARAM_HW_MODES: + local->enabled_modes = value; + break; + + case PRISM2_PARAM_CREATE_IBSS: + if (sdata->type != IEEE80211_IF_TYPE_IBSS) + ret = -EINVAL; + else + sdata->u.sta.create_ibss = !!value; + break; + case PRISM2_PARAM_WMM_ENABLED: + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) + ret = -EINVAL; + else + sdata->u.sta.wmm_enabled = !!value; + break; + case PRISM2_PARAM_RADAR_DETECT: + local->hw.conf.radar_detect = value; + break; + case PRISM2_PARAM_SPECTRUM_MGMT: + local->hw.conf.spect_mgmt = value; + break; + default: + ret = -EOPNOTSUPP; + break; + } + + return ret; +} + + +static int ieee80211_ioctl_get_prism2_param(struct net_device *dev, + struct iw_request_info *info, + void *wrqu, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + int *param = (int *) extra; + int ret = 0; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + switch (*param) { + case PRISM2_PARAM_IEEE_802_1X: + *param = sdata->ieee802_1x; + break; + + case PRISM2_PARAM_ANTSEL_TX: + *param = local->hw.conf.antenna_sel_tx; + break; + + case PRISM2_PARAM_ANTSEL_RX: + *param = local->hw.conf.antenna_sel_rx; + break; + + case PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES: + *param = local->cts_protect_erp_frames; + break; + + case PRISM2_PARAM_DROP_UNENCRYPTED: + *param = sdata->drop_unencrypted; + break; + + case PRISM2_PARAM_PREAMBLE: + *param = local->short_preamble; + break; + + case PRISM2_PARAM_STAT_TIME: + *param = local->stat_time; + break; + case PRISM2_PARAM_SHORT_SLOT_TIME: + *param = !!(local->hw.conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME); + break; + + case PRISM2_PARAM_NEXT_MODE: + *param = local->next_mode; + break; + + case PRISM2_PARAM_ANTENNA_MODE: + *param = local->hw.conf.antenna_mode; + break; + + case PRISM2_PARAM_STA_ANTENNA_SEL: + *param = local->sta_antenna_sel; + break; + + case PRISM2_PARAM_RATE_CTRL_NUM_UP: + *param = local->rate_ctrl_num_up; + break; + + case PRISM2_PARAM_RATE_CTRL_NUM_DOWN: + *param = local->rate_ctrl_num_down; + break; + + case PRISM2_PARAM_TX_POWER_REDUCTION: + *param = local->hw.conf.tx_power_reduction; + break; + + case PRISM2_PARAM_KEY_TX_RX_THRESHOLD: + *param = local->key_tx_rx_threshold; + break; + + case PRISM2_PARAM_DEFAULT_WEP_ONLY: + *param = local->default_wep_only; + break; + + case PRISM2_PARAM_WIFI_WME_NOACK_TEST: + *param = local->wifi_wme_noack_test; + break; + + case PRISM2_PARAM_SCAN_FLAGS: + *param = local->scan_flags; + break; + + case PRISM2_PARAM_HW_MODES: + *param = local->enabled_modes; + break; + + case PRISM2_PARAM_CREATE_IBSS: + if (sdata->type != IEEE80211_IF_TYPE_IBSS) + ret = -EINVAL; + else + *param = !!sdata->u.sta.create_ibss; + break; + + case PRISM2_PARAM_MIXED_CELL: + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) + ret = -EINVAL; + else + *param = !!sdata->u.sta.mixed_cell; + break; + case PRISM2_PARAM_WMM_ENABLED: + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) + ret = -EINVAL; + else + *param = !!sdata->u.sta.wmm_enabled; + break; + default: + ret = -EOPNOTSUPP; + break; + } + + return ret; +} + +static int ieee80211_ioctl_siwmlme(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *data, char *extra) +{ + struct ieee80211_sub_if_data *sdata; + struct iw_mlme *mlme = (struct iw_mlme *) extra; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) + return -EINVAL; + + switch (mlme->cmd) { + case IW_MLME_DEAUTH: + /* TODO: mlme->addr.sa_data */ + return ieee80211_sta_deauthenticate(dev, mlme->reason_code); + case IW_MLME_DISASSOC: + /* TODO: mlme->addr.sa_data */ + return ieee80211_sta_disassociate(dev, mlme->reason_code); + default: + return -EOPNOTSUPP; + } +} + + +static int ieee80211_ioctl_siwencode(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *erq, char *keybuf) +{ + struct ieee80211_sub_if_data *sdata; + int idx, i, alg = ALG_WEP; + u8 bcaddr[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + idx = erq->flags & IW_ENCODE_INDEX; + if (idx == 0) { + if (sdata->default_key) + for (i = 0; i < NUM_DEFAULT_KEYS; i++) { + if (sdata->default_key == sdata->keys[i]) { + idx = i; + break; + } + } + } else if (idx < 1 || idx > 4) + return -EINVAL; + else + idx--; + + if (erq->flags & IW_ENCODE_DISABLED) + alg = ALG_NONE; + else if (erq->length == 0) { + /* No key data - just set the default TX key index */ + if (sdata->default_key != sdata->keys[idx]) + sdata->default_key = sdata->keys[idx]; + return 0; + } + + return ieee80211_set_encryption( + dev, bcaddr, + idx, alg, + !sdata->default_key, + keybuf, erq->length); +} + + +static int ieee80211_ioctl_giwencode(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *erq, char *key) +{ + struct ieee80211_sub_if_data *sdata; + int idx, i; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + idx = erq->flags & IW_ENCODE_INDEX; + if (idx < 1 || idx > 4) { + idx = -1; + if (!sdata->default_key) + idx = 0; + else for (i = 0; i < NUM_DEFAULT_KEYS; i++) { + if (sdata->default_key == sdata->keys[i]) { + idx = i; + break; + } + } + if (idx < 0) + return -EINVAL; + } else + idx--; + + erq->flags = idx + 1; + + if (!sdata->keys[idx]) { + erq->length = 0; + erq->flags |= IW_ENCODE_DISABLED; + return 0; + } + + memcpy(key, sdata->keys[idx]->key, + min((int)erq->length, sdata->keys[idx]->keylen)); + erq->length = sdata->keys[idx]->keylen; + erq->flags |= IW_ENCODE_ENABLED; + + return 0; +} + +static int ieee80211_ioctl_siwauth(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *data, char *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + int ret = 0; + + switch (data->flags & IW_AUTH_INDEX) { + case IW_AUTH_WPA_VERSION: + case IW_AUTH_CIPHER_PAIRWISE: + case IW_AUTH_CIPHER_GROUP: + case IW_AUTH_WPA_ENABLED: + case IW_AUTH_RX_UNENCRYPTED_EAPOL: + break; + case IW_AUTH_KEY_MGMT: + if (sdata->type != IEEE80211_IF_TYPE_STA) + ret = -EINVAL; + else { + /* + * TODO: sdata->u.sta.key_mgmt does not match with WE18 + * value completely; could consider modifying this to + * be closer to WE18. For now, this value is not really + * used for anything else than Privacy matching, so the + * current code here should be more or less OK. + */ + if (data->value & IW_AUTH_KEY_MGMT_802_1X) { + sdata->u.sta.key_mgmt = + IEEE80211_KEY_MGMT_WPA_EAP; + } else if (data->value & IW_AUTH_KEY_MGMT_PSK) { + sdata->u.sta.key_mgmt = + IEEE80211_KEY_MGMT_WPA_PSK; + } else { + sdata->u.sta.key_mgmt = + IEEE80211_KEY_MGMT_NONE; + } + } + break; + case IW_AUTH_80211_AUTH_ALG: + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) + sdata->u.sta.auth_algs = data->value; + else + ret = -EOPNOTSUPP; + break; + case IW_AUTH_PRIVACY_INVOKED: + if (local->ops->set_privacy_invoked) + ret = local->ops->set_privacy_invoked( + local_to_hw(local), data->value); + break; + default: + ret = -EOPNOTSUPP; + break; + } + return ret; +} + +/* Get wireless statistics. Called by /proc/net/wireless and by SIOCGIWSTATS */ +static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct iw_statistics *wstats = &local->wstats; + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct sta_info *sta = NULL; + + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) + sta = sta_info_get(local, sdata->u.sta.bssid); + if (!sta) { + wstats->discard.fragment = 0; + wstats->discard.misc = 0; + wstats->qual.qual = 0; + wstats->qual.level = 0; + wstats->qual.noise = 0; + wstats->qual.updated = IW_QUAL_ALL_INVALID; + } else { + wstats->qual.level = sta->last_rssi; + wstats->qual.qual = sta->last_signal; + wstats->qual.noise = sta->last_noise; + wstats->qual.updated = local->wstats_flags; + sta_info_put(sta); + } + return wstats; +} + +static int ieee80211_ioctl_giwauth(struct net_device *dev, + struct iw_request_info *info, + struct iw_param *data, char *extra) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + int ret = 0; + + switch (data->flags & IW_AUTH_INDEX) { + case IW_AUTH_80211_AUTH_ALG: + if (sdata->type == IEEE80211_IF_TYPE_STA || + sdata->type == IEEE80211_IF_TYPE_IBSS) + data->value = sdata->u.sta.auth_algs; + else + ret = -EOPNOTSUPP; + break; + default: + ret = -EOPNOTSUPP; + break; + } + return ret; +} + + +static int ieee80211_ioctl_siwencodeext(struct net_device *dev, + struct iw_request_info *info, + struct iw_point *erq, char *extra) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct iw_encode_ext *ext = (struct iw_encode_ext *) extra; + int alg, idx, i; + + switch (ext->alg) { + case IW_ENCODE_ALG_NONE: + alg = ALG_NONE; + break; + case IW_ENCODE_ALG_WEP: + alg = ALG_WEP; + break; + case IW_ENCODE_ALG_TKIP: + alg = ALG_TKIP; + break; + case IW_ENCODE_ALG_CCMP: + alg = ALG_CCMP; + break; + default: + return -EOPNOTSUPP; + } + + if (erq->flags & IW_ENCODE_DISABLED) + alg = ALG_NONE; + + idx = erq->flags & IW_ENCODE_INDEX; + if (idx < 1 || idx > 4) { + idx = -1; + if (!sdata->default_key) + idx = 0; + else for (i = 0; i < NUM_DEFAULT_KEYS; i++) { + if (sdata->default_key == sdata->keys[i]) { + idx = i; + break; + } + } + if (idx < 0) + return -EINVAL; + } else + idx--; + + return ieee80211_set_encryption(dev, ext->addr.sa_data, idx, alg, + ext->ext_flags & + IW_ENCODE_EXT_SET_TX_KEY, + ext->key, ext->key_len); +} + + +static const struct iw_priv_args ieee80211_ioctl_priv[] = { + { PRISM2_IOCTL_PRISM2_PARAM, + IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 2, 0, "param" }, + { PRISM2_IOCTL_GET_PRISM2_PARAM, + IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, + IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_param" }, +}; + +/* Structures to export the Wireless Handlers */ + +static const iw_handler ieee80211_handler[] = +{ + (iw_handler) NULL, /* SIOCSIWCOMMIT */ + (iw_handler) ieee80211_ioctl_giwname, /* SIOCGIWNAME */ + (iw_handler) NULL, /* SIOCSIWNWID */ + (iw_handler) NULL, /* SIOCGIWNWID */ + (iw_handler) ieee80211_ioctl_siwfreq, /* SIOCSIWFREQ */ + (iw_handler) ieee80211_ioctl_giwfreq, /* SIOCGIWFREQ */ + (iw_handler) ieee80211_ioctl_siwmode, /* SIOCSIWMODE */ + (iw_handler) ieee80211_ioctl_giwmode, /* SIOCGIWMODE */ + (iw_handler) NULL, /* SIOCSIWSENS */ + (iw_handler) NULL, /* SIOCGIWSENS */ + (iw_handler) NULL /* not used */, /* SIOCSIWRANGE */ + (iw_handler) ieee80211_ioctl_giwrange, /* SIOCGIWRANGE */ + (iw_handler) NULL /* not used */, /* SIOCSIWPRIV */ + (iw_handler) NULL /* kernel code */, /* SIOCGIWPRIV */ + (iw_handler) NULL /* not used */, /* SIOCSIWSTATS */ + (iw_handler) NULL /* kernel code */, /* SIOCGIWSTATS */ + iw_handler_set_spy, /* SIOCSIWSPY */ + iw_handler_get_spy, /* SIOCGIWSPY */ + iw_handler_set_thrspy, /* SIOCSIWTHRSPY */ + iw_handler_get_thrspy, /* SIOCGIWTHRSPY */ + (iw_handler) ieee80211_ioctl_siwap, /* SIOCSIWAP */ + (iw_handler) ieee80211_ioctl_giwap, /* SIOCGIWAP */ + (iw_handler) ieee80211_ioctl_siwmlme, /* SIOCSIWMLME */ + (iw_handler) NULL, /* SIOCGIWAPLIST */ + (iw_handler) ieee80211_ioctl_siwscan, /* SIOCSIWSCAN */ + (iw_handler) ieee80211_ioctl_giwscan, /* SIOCGIWSCAN */ + (iw_handler) ieee80211_ioctl_siwessid, /* SIOCSIWESSID */ + (iw_handler) ieee80211_ioctl_giwessid, /* SIOCGIWESSID */ + (iw_handler) NULL, /* SIOCSIWNICKN */ + (iw_handler) NULL, /* SIOCGIWNICKN */ + (iw_handler) NULL, /* -- hole -- */ + (iw_handler) NULL, /* -- hole -- */ + (iw_handler) NULL, /* SIOCSIWRATE */ + (iw_handler) NULL, /* SIOCGIWRATE */ + (iw_handler) ieee80211_ioctl_siwrts, /* SIOCSIWRTS */ + (iw_handler) ieee80211_ioctl_giwrts, /* SIOCGIWRTS */ + (iw_handler) ieee80211_ioctl_siwfrag, /* SIOCSIWFRAG */ + (iw_handler) ieee80211_ioctl_giwfrag, /* SIOCGIWFRAG */ + (iw_handler) NULL, /* SIOCSIWTXPOW */ + (iw_handler) NULL, /* SIOCGIWTXPOW */ + (iw_handler) ieee80211_ioctl_siwretry, /* SIOCSIWRETRY */ + (iw_handler) ieee80211_ioctl_giwretry, /* SIOCGIWRETRY */ + (iw_handler) ieee80211_ioctl_siwencode, /* SIOCSIWENCODE */ + (iw_handler) ieee80211_ioctl_giwencode, /* SIOCGIWENCODE */ + (iw_handler) NULL, /* SIOCSIWPOWER */ + (iw_handler) NULL, /* SIOCGIWPOWER */ + (iw_handler) NULL, /* -- hole -- */ + (iw_handler) NULL, /* -- hole -- */ + (iw_handler) ieee80211_ioctl_siwgenie, /* SIOCSIWGENIE */ + (iw_handler) NULL, /* SIOCGIWGENIE */ + (iw_handler) ieee80211_ioctl_siwauth, /* SIOCSIWAUTH */ + (iw_handler) ieee80211_ioctl_giwauth, /* SIOCGIWAUTH */ + (iw_handler) ieee80211_ioctl_siwencodeext, /* SIOCSIWENCODEEXT */ + (iw_handler) NULL, /* SIOCGIWENCODEEXT */ + (iw_handler) NULL, /* SIOCSIWPMKSA */ + (iw_handler) NULL, /* -- hole -- */ +}; + +static const iw_handler ieee80211_private_handler[] = +{ /* SIOCIWFIRSTPRIV + */ + (iw_handler) ieee80211_ioctl_prism2_param, /* 0 */ + (iw_handler) ieee80211_ioctl_get_prism2_param, /* 1 */ +}; + +const struct iw_handler_def ieee80211_iw_handler_def = +{ + .num_standard = ARRAY_SIZE(ieee80211_handler), + .num_private = ARRAY_SIZE(ieee80211_private_handler), + .num_private_args = ARRAY_SIZE(ieee80211_ioctl_priv), + .standard = (iw_handler *) ieee80211_handler, + .private = (iw_handler *) ieee80211_private_handler, + .private_args = (struct iw_priv_args *) ieee80211_ioctl_priv, + .get_wireless_stats = ieee80211_get_wireless_stats, +}; diff --git a/net/mac80211/ieee80211_key.h b/net/mac80211/ieee80211_key.h new file mode 100644 index 00000000000..da67d87705d --- /dev/null +++ b/net/mac80211/ieee80211_key.h @@ -0,0 +1,89 @@ +/* + * Copyright 2002-2004, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef IEEE80211_KEY_H +#define IEEE80211_KEY_H + +#include <linux/types.h> +#include <linux/kref.h> +#include <linux/crypto.h> +#include <net/mac80211.h> + +/* ALG_TKIP + * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block: + * Temporal Encryption Key (128 bits) + * Temporal Authenticator Tx MIC Key (64 bits) + * Temporal Authenticator Rx MIC Key (64 bits) + */ + +#define WEP_IV_LEN 4 +#define WEP_ICV_LEN 4 + +#define ALG_TKIP_KEY_LEN 32 +/* Starting offsets for each key */ +#define ALG_TKIP_TEMP_ENCR_KEY 0 +#define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16 +#define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24 +#define TKIP_IV_LEN 8 +#define TKIP_ICV_LEN 4 + +#define ALG_CCMP_KEY_LEN 16 +#define CCMP_HDR_LEN 8 +#define CCMP_MIC_LEN 8 +#define CCMP_TK_LEN 16 +#define CCMP_PN_LEN 6 + +#define NUM_RX_DATA_QUEUES 17 + +struct ieee80211_key { + struct kref kref; + + int hw_key_idx; /* filled and used by low-level driver */ + ieee80211_key_alg alg; + union { + struct { + /* last used TSC */ + u32 iv32; + u16 iv16; + u16 p1k[5]; + int tx_initialized; + + /* last received RSC */ + u32 iv32_rx[NUM_RX_DATA_QUEUES]; + u16 iv16_rx[NUM_RX_DATA_QUEUES]; + u16 p1k_rx[NUM_RX_DATA_QUEUES][5]; + int rx_initialized[NUM_RX_DATA_QUEUES]; + } tkip; + struct { + u8 tx_pn[6]; + u8 rx_pn[NUM_RX_DATA_QUEUES][6]; + struct crypto_cipher *tfm; + u32 replays; /* dot11RSNAStatsCCMPReplays */ + /* scratch buffers for virt_to_page() (crypto API) */ +#ifndef AES_BLOCK_LEN +#define AES_BLOCK_LEN 16 +#endif + u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; + u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; + } ccmp; + } u; + int tx_rx_count; /* number of times this key has been used */ + int keylen; + + /* if the low level driver can provide hardware acceleration it should + * clear this flag */ + unsigned int force_sw_encrypt:1; + unsigned int default_tx_key:1; /* This key is the new default TX key + * (used only for broadcast keys). */ + s8 keyidx; /* WEP key index */ + + u8 key[0]; +}; + +#endif /* IEEE80211_KEY_H */ diff --git a/net/mac80211/ieee80211_led.c b/net/mac80211/ieee80211_led.c new file mode 100644 index 00000000000..719d75b2070 --- /dev/null +++ b/net/mac80211/ieee80211_led.c @@ -0,0 +1,91 @@ +/* + * Copyright 2006, Johannes Berg <johannes@sipsolutions.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* just for IFNAMSIZ */ +#include <linux/if.h> +#include "ieee80211_led.h" + +void ieee80211_led_rx(struct ieee80211_local *local) +{ + if (unlikely(!local->rx_led)) + return; + if (local->rx_led_counter++ % 2 == 0) + led_trigger_event(local->rx_led, LED_OFF); + else + led_trigger_event(local->rx_led, LED_FULL); +} + +/* q is 1 if a packet was enqueued, 0 if it has been transmitted */ +void ieee80211_led_tx(struct ieee80211_local *local, int q) +{ + if (unlikely(!local->tx_led)) + return; + /* not sure how this is supposed to work ... */ + local->tx_led_counter += 2*q-1; + if (local->tx_led_counter % 2 == 0) + led_trigger_event(local->tx_led, LED_OFF); + else + led_trigger_event(local->tx_led, LED_FULL); +} + +void ieee80211_led_init(struct ieee80211_local *local) +{ + local->rx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL); + if (!local->rx_led) + return; + snprintf(local->rx_led_name, sizeof(local->rx_led_name), + "%srx", wiphy_name(local->hw.wiphy)); + local->rx_led->name = local->rx_led_name; + if (led_trigger_register(local->rx_led)) { + kfree(local->rx_led); + local->rx_led = NULL; + } + + local->tx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL); + if (!local->tx_led) + return; + snprintf(local->tx_led_name, sizeof(local->tx_led_name), + "%stx", wiphy_name(local->hw.wiphy)); + local->tx_led->name = local->tx_led_name; + if (led_trigger_register(local->tx_led)) { + kfree(local->tx_led); + local->tx_led = NULL; + } +} + +void ieee80211_led_exit(struct ieee80211_local *local) +{ + if (local->tx_led) { + led_trigger_unregister(local->tx_led); + kfree(local->tx_led); + } + if (local->rx_led) { + led_trigger_unregister(local->rx_led); + kfree(local->rx_led); + } +} + +char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + if (local->tx_led) + return local->tx_led_name; + return NULL; +} +EXPORT_SYMBOL(__ieee80211_get_tx_led_name); + +char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + if (local->rx_led) + return local->rx_led_name; + return NULL; +} +EXPORT_SYMBOL(__ieee80211_get_rx_led_name); diff --git a/net/mac80211/ieee80211_led.h b/net/mac80211/ieee80211_led.h new file mode 100644 index 00000000000..5c8ab826387 --- /dev/null +++ b/net/mac80211/ieee80211_led.h @@ -0,0 +1,32 @@ +/* + * Copyright 2006, Johannes Berg <johannes@sipsolutions.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/leds.h> +#include "ieee80211_i.h" + +#ifdef CONFIG_MAC80211_LEDS +extern void ieee80211_led_rx(struct ieee80211_local *local); +extern void ieee80211_led_tx(struct ieee80211_local *local, int q); +extern void ieee80211_led_init(struct ieee80211_local *local); +extern void ieee80211_led_exit(struct ieee80211_local *local); +#else +static inline void ieee80211_led_rx(struct ieee80211_local *local) +{ +} +static inline void ieee80211_led_tx(struct ieee80211_local *local, int q) +{ +} +static inline void ieee80211_led_init(struct ieee80211_local *local) +{ +} +static inline void ieee80211_led_exit(struct ieee80211_local *local) +{ +} +#endif diff --git a/net/mac80211/ieee80211_rate.c b/net/mac80211/ieee80211_rate.c new file mode 100644 index 00000000000..16e850864b8 --- /dev/null +++ b/net/mac80211/ieee80211_rate.c @@ -0,0 +1,140 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005-2006, Devicescape Software, Inc. + * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include "ieee80211_rate.h" +#include "ieee80211_i.h" + +struct rate_control_alg { + struct list_head list; + struct rate_control_ops *ops; +}; + +static LIST_HEAD(rate_ctrl_algs); +static DEFINE_MUTEX(rate_ctrl_mutex); + +int ieee80211_rate_control_register(struct rate_control_ops *ops) +{ + struct rate_control_alg *alg; + + alg = kmalloc(sizeof(*alg), GFP_KERNEL); + if (alg == NULL) { + return -ENOMEM; + } + memset(alg, 0, sizeof(*alg)); + alg->ops = ops; + + mutex_lock(&rate_ctrl_mutex); + list_add_tail(&alg->list, &rate_ctrl_algs); + mutex_unlock(&rate_ctrl_mutex); + + return 0; +} +EXPORT_SYMBOL(ieee80211_rate_control_register); + +void ieee80211_rate_control_unregister(struct rate_control_ops *ops) +{ + struct rate_control_alg *alg; + + mutex_lock(&rate_ctrl_mutex); + list_for_each_entry(alg, &rate_ctrl_algs, list) { + if (alg->ops == ops) { + list_del(&alg->list); + break; + } + } + mutex_unlock(&rate_ctrl_mutex); + kfree(alg); +} +EXPORT_SYMBOL(ieee80211_rate_control_unregister); + +static struct rate_control_ops * +ieee80211_try_rate_control_ops_get(const char *name) +{ + struct rate_control_alg *alg; + struct rate_control_ops *ops = NULL; + + mutex_lock(&rate_ctrl_mutex); + list_for_each_entry(alg, &rate_ctrl_algs, list) { + if (!name || !strcmp(alg->ops->name, name)) + if (try_module_get(alg->ops->module)) { + ops = alg->ops; + break; + } + } + mutex_unlock(&rate_ctrl_mutex); + return ops; +} + +/* Get the rate control algorithm. If `name' is NULL, get the first + * available algorithm. */ +static struct rate_control_ops * +ieee80211_rate_control_ops_get(const char *name) +{ + struct rate_control_ops *ops; + + ops = ieee80211_try_rate_control_ops_get(name); + if (!ops) { + request_module("rc80211_%s", name ? name : "default"); + ops = ieee80211_try_rate_control_ops_get(name); + } + return ops; +} + +static void ieee80211_rate_control_ops_put(struct rate_control_ops *ops) +{ + module_put(ops->module); +} + +struct rate_control_ref *rate_control_alloc(const char *name, + struct ieee80211_local *local) +{ + struct rate_control_ref *ref; + + ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL); + if (!ref) + goto fail_ref; + kref_init(&ref->kref); + ref->ops = ieee80211_rate_control_ops_get(name); + if (!ref->ops) + goto fail_ops; + ref->priv = ref->ops->alloc(local); + if (!ref->priv) + goto fail_priv; + return ref; + +fail_priv: + ieee80211_rate_control_ops_put(ref->ops); +fail_ops: + kfree(ref); +fail_ref: + return NULL; +} + +static void rate_control_release(struct kref *kref) +{ + struct rate_control_ref *ctrl_ref; + + ctrl_ref = container_of(kref, struct rate_control_ref, kref); + ctrl_ref->ops->free(ctrl_ref->priv); + ieee80211_rate_control_ops_put(ctrl_ref->ops); + kfree(ctrl_ref); +} + +struct rate_control_ref *rate_control_get(struct rate_control_ref *ref) +{ + kref_get(&ref->kref); + return ref; +} + +void rate_control_put(struct rate_control_ref *ref) +{ + kref_put(&ref->kref, rate_control_release); +} diff --git a/net/mac80211/ieee80211_rate.h b/net/mac80211/ieee80211_rate.h new file mode 100644 index 00000000000..710f5685ced --- /dev/null +++ b/net/mac80211/ieee80211_rate.h @@ -0,0 +1,122 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef IEEE80211_RATE_H +#define IEEE80211_RATE_H + +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/types.h> +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "sta_info.h" + +#define RATE_CONTROL_NUM_DOWN 20 +#define RATE_CONTROL_NUM_UP 15 + + +struct rate_control_extra { + /* values from rate_control_get_rate() to the caller: */ + struct ieee80211_rate *probe; /* probe with this rate, or NULL for no + * probing */ + struct ieee80211_rate *nonerp; + + /* parameters from the caller to rate_control_get_rate(): */ + struct ieee80211_hw_mode *mode; + int mgmt_data; /* this is data frame that is used for management + * (e.g., IEEE 802.1X EAPOL) */ + u16 ethertype; +}; + + +struct rate_control_ops { + struct module *module; + const char *name; + void (*tx_status)(void *priv, struct net_device *dev, + struct sk_buff *skb, + struct ieee80211_tx_status *status); + struct ieee80211_rate *(*get_rate)(void *priv, struct net_device *dev, + struct sk_buff *skb, + struct rate_control_extra *extra); + void (*rate_init)(void *priv, void *priv_sta, + struct ieee80211_local *local, struct sta_info *sta); + void (*clear)(void *priv); + + void *(*alloc)(struct ieee80211_local *local); + void (*free)(void *priv); + void *(*alloc_sta)(void *priv, gfp_t gfp); + void (*free_sta)(void *priv, void *priv_sta); + + int (*add_attrs)(void *priv, struct kobject *kobj); + void (*remove_attrs)(void *priv, struct kobject *kobj); +}; + +struct rate_control_ref { + struct rate_control_ops *ops; + void *priv; + struct kref kref; +}; + +int ieee80211_rate_control_register(struct rate_control_ops *ops); +void ieee80211_rate_control_unregister(struct rate_control_ops *ops); + +/* Get a reference to the rate control algorithm. If `name' is NULL, get the + * first available algorithm. */ +struct rate_control_ref *rate_control_alloc(const char *name, + struct ieee80211_local *local); +struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); +void rate_control_put(struct rate_control_ref *ref); + +static inline void rate_control_tx_status(struct ieee80211_local *local, + struct net_device *dev, + struct sk_buff *skb, + struct ieee80211_tx_status *status) +{ + struct rate_control_ref *ref = local->rate_ctrl; + ref->ops->tx_status(ref->priv, dev, skb, status); +} + + +static inline struct ieee80211_rate * +rate_control_get_rate(struct ieee80211_local *local, struct net_device *dev, + struct sk_buff *skb, struct rate_control_extra *extra) +{ + struct rate_control_ref *ref = local->rate_ctrl; + return ref->ops->get_rate(ref->priv, dev, skb, extra); +} + + +static inline void rate_control_rate_init(struct sta_info *sta, + struct ieee80211_local *local) +{ + struct rate_control_ref *ref = sta->rate_ctrl; + ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta); +} + + +static inline void rate_control_clear(struct ieee80211_local *local) +{ + struct rate_control_ref *ref = local->rate_ctrl; + ref->ops->clear(ref->priv); +} + +static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, + gfp_t gfp) +{ + return ref->ops->alloc_sta(ref->priv, gfp); +} + +static inline void rate_control_free_sta(struct rate_control_ref *ref, + void *priv) +{ + ref->ops->free_sta(ref->priv, priv); +} + +#endif /* IEEE80211_RATE_H */ diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c new file mode 100644 index 00000000000..822917debef --- /dev/null +++ b/net/mac80211/ieee80211_sta.c @@ -0,0 +1,3060 @@ +/* + * BSS client mode implementation + * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> + * Copyright 2004, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> + * Copyright 2007, Michael Wu <flamingice@sourmilk.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* TODO: + * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs + * order BSS list by RSSI(?) ("quality of AP") + * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, + * SSID) + */ +#include <linux/if_ether.h> +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/if_arp.h> +#include <linux/wireless.h> +#include <linux/random.h> +#include <linux/etherdevice.h> +#include <linux/rtnetlink.h> +#include <net/iw_handler.h> +#include <asm/types.h> +#include <asm/delay.h> + +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "ieee80211_rate.h" +#include "hostapd_ioctl.h" + +#define IEEE80211_AUTH_TIMEOUT (HZ / 5) +#define IEEE80211_AUTH_MAX_TRIES 3 +#define IEEE80211_ASSOC_TIMEOUT (HZ / 5) +#define IEEE80211_ASSOC_MAX_TRIES 3 +#define IEEE80211_MONITORING_INTERVAL (2 * HZ) +#define IEEE80211_PROBE_INTERVAL (60 * HZ) +#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) +#define IEEE80211_SCAN_INTERVAL (2 * HZ) +#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) +#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) + +#define IEEE80211_PROBE_DELAY (HZ / 33) +#define IEEE80211_CHANNEL_TIME (HZ / 33) +#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) +#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) +#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) +#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) + +#define IEEE80211_IBSS_MAX_STA_ENTRIES 128 + + +#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) + +#define ERP_INFO_USE_PROTECTION BIT(1) + +static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, + u8 *ssid, size_t ssid_len); +static struct ieee80211_sta_bss * +ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid); +static void ieee80211_rx_bss_put(struct net_device *dev, + struct ieee80211_sta_bss *bss); +static int ieee80211_sta_find_ibss(struct net_device *dev, + struct ieee80211_if_sta *ifsta); +static int ieee80211_sta_wep_configured(struct net_device *dev); +static int ieee80211_sta_start_scan(struct net_device *dev, + u8 *ssid, size_t ssid_len); +static int ieee80211_sta_config_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta); + + +/* Parsed Information Elements */ +struct ieee802_11_elems { + u8 *ssid; + u8 ssid_len; + u8 *supp_rates; + u8 supp_rates_len; + u8 *fh_params; + u8 fh_params_len; + u8 *ds_params; + u8 ds_params_len; + u8 *cf_params; + u8 cf_params_len; + u8 *tim; + u8 tim_len; + u8 *ibss_params; + u8 ibss_params_len; + u8 *challenge; + u8 challenge_len; + u8 *wpa; + u8 wpa_len; + u8 *rsn; + u8 rsn_len; + u8 *erp_info; + u8 erp_info_len; + u8 *ext_supp_rates; + u8 ext_supp_rates_len; + u8 *wmm_info; + u8 wmm_info_len; + u8 *wmm_param; + u8 wmm_param_len; +}; + +typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes; + + +static ParseRes ieee802_11_parse_elems(u8 *start, size_t len, + struct ieee802_11_elems *elems) +{ + size_t left = len; + u8 *pos = start; + int unknown = 0; + + memset(elems, 0, sizeof(*elems)); + + while (left >= 2) { + u8 id, elen; + + id = *pos++; + elen = *pos++; + left -= 2; + + if (elen > left) { +#if 0 + if (net_ratelimit()) + printk(KERN_DEBUG "IEEE 802.11 element parse " + "failed (id=%d elen=%d left=%d)\n", + id, elen, left); +#endif + return ParseFailed; + } + + switch (id) { + case WLAN_EID_SSID: + elems->ssid = pos; + elems->ssid_len = elen; + break; + case WLAN_EID_SUPP_RATES: + elems->supp_rates = pos; + elems->supp_rates_len = elen; + break; + case WLAN_EID_FH_PARAMS: + elems->fh_params = pos; + elems->fh_params_len = elen; + break; + case WLAN_EID_DS_PARAMS: + elems->ds_params = pos; + elems->ds_params_len = elen; + break; + case WLAN_EID_CF_PARAMS: + elems->cf_params = pos; + elems->cf_params_len = elen; + break; + case WLAN_EID_TIM: + elems->tim = pos; + elems->tim_len = elen; + break; + case WLAN_EID_IBSS_PARAMS: + elems->ibss_params = pos; + elems->ibss_params_len = elen; + break; + case WLAN_EID_CHALLENGE: + elems->challenge = pos; + elems->challenge_len = elen; + break; + case WLAN_EID_WPA: + if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && + pos[2] == 0xf2) { + /* Microsoft OUI (00:50:F2) */ + if (pos[3] == 1) { + /* OUI Type 1 - WPA IE */ + elems->wpa = pos; + elems->wpa_len = elen; + } else if (elen >= 5 && pos[3] == 2) { + if (pos[4] == 0) { + elems->wmm_info = pos; + elems->wmm_info_len = elen; + } else if (pos[4] == 1) { + elems->wmm_param = pos; + elems->wmm_param_len = elen; + } + } + } + break; + case WLAN_EID_RSN: + elems->rsn = pos; + elems->rsn_len = elen; + break; + case WLAN_EID_ERP_INFO: + elems->erp_info = pos; + elems->erp_info_len = elen; + break; + case WLAN_EID_EXT_SUPP_RATES: + elems->ext_supp_rates = pos; + elems->ext_supp_rates_len = elen; + break; + default: +#if 0 + printk(KERN_DEBUG "IEEE 802.11 element parse ignored " + "unknown element (id=%d elen=%d)\n", + id, elen); +#endif + unknown++; + break; + } + + left -= elen; + pos += elen; + } + + /* Do not trigger error if left == 1 as Apple Airport base stations + * send AssocResps that are one spurious byte too long. */ + + return unknown ? ParseUnknown : ParseOK; +} + + + + +static int ecw2cw(int ecw) +{ + int cw = 1; + while (ecw > 0) { + cw <<= 1; + ecw--; + } + return cw - 1; +} + + +static void ieee80211_sta_wmm_params(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + u8 *wmm_param, size_t wmm_param_len) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_tx_queue_params params; + size_t left; + int count; + u8 *pos; + + if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) + return; + count = wmm_param[6] & 0x0f; + if (count == ifsta->wmm_last_param_set) + return; + ifsta->wmm_last_param_set = count; + + pos = wmm_param + 8; + left = wmm_param_len - 8; + + memset(¶ms, 0, sizeof(params)); + + if (!local->ops->conf_tx) + return; + + local->wmm_acm = 0; + for (; left >= 4; left -= 4, pos += 4) { + int aci = (pos[0] >> 5) & 0x03; + int acm = (pos[0] >> 4) & 0x01; + int queue; + + switch (aci) { + case 1: + queue = IEEE80211_TX_QUEUE_DATA3; + if (acm) { + local->wmm_acm |= BIT(0) | BIT(3); + } + break; + case 2: + queue = IEEE80211_TX_QUEUE_DATA1; + if (acm) { + local->wmm_acm |= BIT(4) | BIT(5); + } + break; + case 3: + queue = IEEE80211_TX_QUEUE_DATA0; + if (acm) { + local->wmm_acm |= BIT(6) | BIT(7); + } + break; + case 0: + default: + queue = IEEE80211_TX_QUEUE_DATA2; + if (acm) { + local->wmm_acm |= BIT(1) | BIT(2); + } + break; + } + + params.aifs = pos[0] & 0x0f; + params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); + params.cw_min = ecw2cw(pos[1] & 0x0f); + /* TXOP is in units of 32 usec; burst_time in 0.1 ms */ + params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100; + printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " + "cWmin=%d cWmax=%d burst=%d\n", + dev->name, queue, aci, acm, params.aifs, params.cw_min, + params.cw_max, params.burst_time); + /* TODO: handle ACM (block TX, fallback to next lowest allowed + * AC for now) */ + if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { + printk(KERN_DEBUG "%s: failed to set TX queue " + "parameters for queue %d\n", dev->name, queue); + } + } +} + + +static void ieee80211_sta_send_associnfo(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + char *buf; + size_t len; + int i; + union iwreq_data wrqu; + + if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) + return; + + buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + + ifsta->assocresp_ies_len), GFP_ATOMIC); + if (!buf) + return; + + len = sprintf(buf, "ASSOCINFO("); + if (ifsta->assocreq_ies) { + len += sprintf(buf + len, "ReqIEs="); + for (i = 0; i < ifsta->assocreq_ies_len; i++) { + len += sprintf(buf + len, "%02x", + ifsta->assocreq_ies[i]); + } + } + if (ifsta->assocresp_ies) { + if (ifsta->assocreq_ies) + len += sprintf(buf + len, " "); + len += sprintf(buf + len, "RespIEs="); + for (i = 0; i < ifsta->assocresp_ies_len; i++) { + len += sprintf(buf + len, "%02x", + ifsta->assocresp_ies[i]); + } + } + len += sprintf(buf + len, ")"); + + if (len > IW_CUSTOM_MAX) { + len = sprintf(buf, "ASSOCRESPIE="); + for (i = 0; i < ifsta->assocresp_ies_len; i++) { + len += sprintf(buf + len, "%02x", + ifsta->assocresp_ies[i]); + } + } + + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = len; + wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); + + kfree(buf); +} + + +static void ieee80211_set_associated(struct net_device *dev, + struct ieee80211_if_sta *ifsta, int assoc) +{ + union iwreq_data wrqu; + + if (ifsta->associated == assoc) + return; + + ifsta->associated = assoc; + + if (assoc) { + struct ieee80211_sub_if_data *sdata; + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type != IEEE80211_IF_TYPE_STA) + return; + netif_carrier_on(dev); + ifsta->prev_bssid_set = 1; + memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); + memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); + ieee80211_sta_send_associnfo(dev, ifsta); + } else { + netif_carrier_off(dev); + memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); + } + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); + ifsta->last_probe = jiffies; +} + +static void ieee80211_set_disassoc(struct net_device *dev, + struct ieee80211_if_sta *ifsta, int deauth) +{ + if (deauth) + ifsta->auth_tries = 0; + ifsta->assoc_tries = 0; + ieee80211_set_associated(dev, ifsta, 0); +} + +static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, + int encrypt) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_tx_packet_data *pkt_data; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + skb->dev = sdata->local->mdev; + skb_set_mac_header(skb, 0); + skb_set_network_header(skb, 0); + skb_set_transport_header(skb, 0); + + pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; + memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); + pkt_data->ifindex = sdata->dev->ifindex; + pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); + pkt_data->do_not_encrypt = !encrypt; + + dev_queue_xmit(skb); +} + + +static void ieee80211_send_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + int transaction, u8 *extra, size_t extra_len, + int encrypt) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + + sizeof(*mgmt) + 6 + extra_len); + if (!skb) { + printk(KERN_DEBUG "%s: failed to allocate buffer for auth " + "frame\n", dev->name); + return; + } + skb_reserve(skb, local->hw.extra_tx_headroom); + + mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); + memset(mgmt, 0, 24 + 6); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_AUTH); + if (encrypt) + mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); + memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); + memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); + memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); + mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); + mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); + ifsta->auth_transaction = transaction + 1; + mgmt->u.auth.status_code = cpu_to_le16(0); + if (extra) + memcpy(skb_put(skb, extra_len), extra, extra_len); + + ieee80211_sta_tx(dev, skb, encrypt); +} + + +static void ieee80211_authenticate(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + ifsta->auth_tries++; + if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { + printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT + " timed out\n", + dev->name, MAC_ARG(ifsta->bssid)); + ifsta->state = IEEE80211_DISABLED; + return; + } + + ifsta->state = IEEE80211_AUTHENTICATE; + printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n", + dev->name, MAC_ARG(ifsta->bssid)); + + ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); + + mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); +} + + +static void ieee80211_send_assoc(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw_mode *mode; + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + u8 *pos, *ies; + int i, len; + u16 capab; + struct ieee80211_sta_bss *bss; + int wmm = 0; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + + sizeof(*mgmt) + 200 + ifsta->extra_ie_len + + ifsta->ssid_len); + if (!skb) { + printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " + "frame\n", dev->name); + return; + } + skb_reserve(skb, local->hw.extra_tx_headroom); + + mode = local->oper_hw_mode; + capab = ifsta->capab; + if (mode->mode == MODE_IEEE80211G) { + capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | + WLAN_CAPABILITY_SHORT_PREAMBLE; + } + bss = ieee80211_rx_bss_get(dev, ifsta->bssid); + if (bss) { + if (bss->capability & WLAN_CAPABILITY_PRIVACY) + capab |= WLAN_CAPABILITY_PRIVACY; + if (bss->wmm_ie) { + wmm = 1; + } + ieee80211_rx_bss_put(dev, bss); + } + + mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); + memset(mgmt, 0, 24); + memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); + memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); + memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); + + if (ifsta->prev_bssid_set) { + skb_put(skb, 10); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_REASSOC_REQ); + mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); + mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); + memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, + ETH_ALEN); + } else { + skb_put(skb, 4); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_ASSOC_REQ); + mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); + mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); + } + + /* SSID */ + ies = pos = skb_put(skb, 2 + ifsta->ssid_len); + *pos++ = WLAN_EID_SSID; + *pos++ = ifsta->ssid_len; + memcpy(pos, ifsta->ssid, ifsta->ssid_len); + + len = mode->num_rates; + if (len > 8) + len = 8; + pos = skb_put(skb, len + 2); + *pos++ = WLAN_EID_SUPP_RATES; + *pos++ = len; + for (i = 0; i < len; i++) { + int rate = mode->rates[i].rate; + if (mode->mode == MODE_ATHEROS_TURBO) + rate /= 2; + *pos++ = (u8) (rate / 5); + } + + if (mode->num_rates > len) { + pos = skb_put(skb, mode->num_rates - len + 2); + *pos++ = WLAN_EID_EXT_SUPP_RATES; + *pos++ = mode->num_rates - len; + for (i = len; i < mode->num_rates; i++) { + int rate = mode->rates[i].rate; + if (mode->mode == MODE_ATHEROS_TURBO) + rate /= 2; + *pos++ = (u8) (rate / 5); + } + } + + if (ifsta->extra_ie) { + pos = skb_put(skb, ifsta->extra_ie_len); + memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); + } + + if (wmm && ifsta->wmm_enabled) { + pos = skb_put(skb, 9); + *pos++ = WLAN_EID_VENDOR_SPECIFIC; + *pos++ = 7; /* len */ + *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ + *pos++ = 0x50; + *pos++ = 0xf2; + *pos++ = 2; /* WME */ + *pos++ = 0; /* WME info */ + *pos++ = 1; /* WME ver */ + *pos++ = 0; + } + + kfree(ifsta->assocreq_ies); + ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; + ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC); + if (ifsta->assocreq_ies) + memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); + + ieee80211_sta_tx(dev, skb, 0); +} + + +static void ieee80211_send_deauth(struct net_device *dev, + struct ieee80211_if_sta *ifsta, u16 reason) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); + if (!skb) { + printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " + "frame\n", dev->name); + return; + } + skb_reserve(skb, local->hw.extra_tx_headroom); + + mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); + memset(mgmt, 0, 24); + memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); + memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); + memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_DEAUTH); + skb_put(skb, 2); + mgmt->u.deauth.reason_code = cpu_to_le16(reason); + + ieee80211_sta_tx(dev, skb, 0); +} + + +static void ieee80211_send_disassoc(struct net_device *dev, + struct ieee80211_if_sta *ifsta, u16 reason) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); + if (!skb) { + printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " + "frame\n", dev->name); + return; + } + skb_reserve(skb, local->hw.extra_tx_headroom); + + mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); + memset(mgmt, 0, 24); + memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); + memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); + memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_DISASSOC); + skb_put(skb, 2); + mgmt->u.disassoc.reason_code = cpu_to_le16(reason); + + ieee80211_sta_tx(dev, skb, 0); +} + + +static int ieee80211_privacy_mismatch(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_sta_bss *bss; + int res = 0; + + if (!ifsta || ifsta->mixed_cell || + ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE) + return 0; + + bss = ieee80211_rx_bss_get(dev, ifsta->bssid); + if (!bss) + return 0; + + if (ieee80211_sta_wep_configured(dev) != + !!(bss->capability & WLAN_CAPABILITY_PRIVACY)) + res = 1; + + ieee80211_rx_bss_put(dev, bss); + + return res; +} + + +static void ieee80211_associate(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + ifsta->assoc_tries++; + if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { + printk(KERN_DEBUG "%s: association with AP " MAC_FMT + " timed out\n", + dev->name, MAC_ARG(ifsta->bssid)); + ifsta->state = IEEE80211_DISABLED; + return; + } + + ifsta->state = IEEE80211_ASSOCIATE; + printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n", + dev->name, MAC_ARG(ifsta->bssid)); + if (ieee80211_privacy_mismatch(dev, ifsta)) { + printk(KERN_DEBUG "%s: mismatch in privacy configuration and " + "mixed-cell disabled - abort association\n", dev->name); + ifsta->state = IEEE80211_DISABLED; + return; + } + + ieee80211_send_assoc(dev, ifsta); + + mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); +} + + +static void ieee80211_associated(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta; + int disassoc; + + /* TODO: start monitoring current AP signal quality and number of + * missed beacons. Scan other channels every now and then and search + * for better APs. */ + /* TODO: remove expired BSSes */ + + ifsta->state = IEEE80211_ASSOCIATED; + + sta = sta_info_get(local, ifsta->bssid); + if (!sta) { + printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n", + dev->name, MAC_ARG(ifsta->bssid)); + disassoc = 1; + } else { + disassoc = 0; + if (time_after(jiffies, + sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { + if (ifsta->probereq_poll) { + printk(KERN_DEBUG "%s: No ProbeResp from " + "current AP " MAC_FMT " - assume out of " + "range\n", + dev->name, MAC_ARG(ifsta->bssid)); + disassoc = 1; + sta_info_free(sta, 0); + ifsta->probereq_poll = 0; + } else { + ieee80211_send_probe_req(dev, ifsta->bssid, + local->scan_ssid, + local->scan_ssid_len); + ifsta->probereq_poll = 1; + } + } else { + ifsta->probereq_poll = 0; + if (time_after(jiffies, ifsta->last_probe + + IEEE80211_PROBE_INTERVAL)) { + ifsta->last_probe = jiffies; + ieee80211_send_probe_req(dev, ifsta->bssid, + ifsta->ssid, + ifsta->ssid_len); + } + } + sta_info_put(sta); + } + if (disassoc) { + union iwreq_data wrqu; + memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); + mod_timer(&ifsta->timer, jiffies + + IEEE80211_MONITORING_INTERVAL + 30 * HZ); + } else { + mod_timer(&ifsta->timer, jiffies + + IEEE80211_MONITORING_INTERVAL); + } +} + + +static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, + u8 *ssid, size_t ssid_len) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw_mode *mode; + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + u8 *pos, *supp_rates, *esupp_rates = NULL; + int i; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); + if (!skb) { + printk(KERN_DEBUG "%s: failed to allocate buffer for probe " + "request\n", dev->name); + return; + } + skb_reserve(skb, local->hw.extra_tx_headroom); + + mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); + memset(mgmt, 0, 24); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_PROBE_REQ); + memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); + if (dst) { + memcpy(mgmt->da, dst, ETH_ALEN); + memcpy(mgmt->bssid, dst, ETH_ALEN); + } else { + memset(mgmt->da, 0xff, ETH_ALEN); + memset(mgmt->bssid, 0xff, ETH_ALEN); + } + pos = skb_put(skb, 2 + ssid_len); + *pos++ = WLAN_EID_SSID; + *pos++ = ssid_len; + memcpy(pos, ssid, ssid_len); + + supp_rates = skb_put(skb, 2); + supp_rates[0] = WLAN_EID_SUPP_RATES; + supp_rates[1] = 0; + mode = local->oper_hw_mode; + for (i = 0; i < mode->num_rates; i++) { + struct ieee80211_rate *rate = &mode->rates[i]; + if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) + continue; + if (esupp_rates) { + pos = skb_put(skb, 1); + esupp_rates[1]++; + } else if (supp_rates[1] == 8) { + esupp_rates = skb_put(skb, 3); + esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; + esupp_rates[1] = 1; + pos = &esupp_rates[2]; + } else { + pos = skb_put(skb, 1); + supp_rates[1]++; + } + if (mode->mode == MODE_ATHEROS_TURBO) + *pos = rate->rate / 10; + else + *pos = rate->rate / 5; + } + + ieee80211_sta_tx(dev, skb, 0); +} + + +static int ieee80211_sta_wep_configured(struct net_device *dev) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (!sdata || !sdata->default_key || + sdata->default_key->alg != ALG_WEP) + return 0; + return 1; +} + + +static void ieee80211_auth_completed(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + printk(KERN_DEBUG "%s: authenticated\n", dev->name); + ifsta->authenticated = 1; + ieee80211_associate(dev, ifsta); +} + + +static void ieee80211_auth_challenge(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_mgmt *mgmt, + size_t len) +{ + u8 *pos; + struct ieee802_11_elems elems; + + printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); + pos = mgmt->u.auth.variable; + if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) + == ParseFailed) { + printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n", + dev->name); + return; + } + if (!elems.challenge) { + printk(KERN_DEBUG "%s: no challenge IE in shared key auth " + "frame\n", dev->name); + return; + } + ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, + elems.challenge_len + 2, 1); +} + + +static void ieee80211_rx_mgmt_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_mgmt *mgmt, + size_t len) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + u16 auth_alg, auth_transaction, status_code; + + if (ifsta->state != IEEE80211_AUTHENTICATE && + sdata->type != IEEE80211_IF_TYPE_IBSS) { + printk(KERN_DEBUG "%s: authentication frame received from " + MAC_FMT ", but not in authenticate state - ignored\n", + dev->name, MAC_ARG(mgmt->sa)); + return; + } + + if (len < 24 + 6) { + printk(KERN_DEBUG "%s: too short (%zd) authentication frame " + "received from " MAC_FMT " - ignored\n", + dev->name, len, MAC_ARG(mgmt->sa)); + return; + } + + if (sdata->type != IEEE80211_IF_TYPE_IBSS && + memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { + printk(KERN_DEBUG "%s: authentication frame received from " + "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " + "ignored\n", dev->name, MAC_ARG(mgmt->sa), + MAC_ARG(mgmt->bssid)); + return; + } + + if (sdata->type != IEEE80211_IF_TYPE_IBSS && + memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { + printk(KERN_DEBUG "%s: authentication frame received from " + "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " + "ignored\n", dev->name, MAC_ARG(mgmt->sa), + MAC_ARG(mgmt->bssid)); + return; + } + + auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); + auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); + status_code = le16_to_cpu(mgmt->u.auth.status_code); + + printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d " + "transaction=%d status=%d)\n", + dev->name, MAC_ARG(mgmt->sa), auth_alg, + auth_transaction, status_code); + + if (sdata->type == IEEE80211_IF_TYPE_IBSS) { + /* IEEE 802.11 standard does not require authentication in IBSS + * networks and most implementations do not seem to use it. + * However, try to reply to authentication attempts if someone + * has actually implemented this. + * TODO: Could implement shared key authentication. */ + if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { + printk(KERN_DEBUG "%s: unexpected IBSS authentication " + "frame (alg=%d transaction=%d)\n", + dev->name, auth_alg, auth_transaction); + return; + } + ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); + } + + if (auth_alg != ifsta->auth_alg || + auth_transaction != ifsta->auth_transaction) { + printk(KERN_DEBUG "%s: unexpected authentication frame " + "(alg=%d transaction=%d)\n", + dev->name, auth_alg, auth_transaction); + return; + } + + if (status_code != WLAN_STATUS_SUCCESS) { + printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " + "code=%d)\n", dev->name, ifsta->auth_alg, status_code); + if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { + u8 algs[3]; + const int num_algs = ARRAY_SIZE(algs); + int i, pos; + algs[0] = algs[1] = algs[2] = 0xff; + if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) + algs[0] = WLAN_AUTH_OPEN; + if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) + algs[1] = WLAN_AUTH_SHARED_KEY; + if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) + algs[2] = WLAN_AUTH_LEAP; + if (ifsta->auth_alg == WLAN_AUTH_OPEN) + pos = 0; + else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) + pos = 1; + else + pos = 2; + for (i = 0; i < num_algs; i++) { + pos++; + if (pos >= num_algs) + pos = 0; + if (algs[pos] == ifsta->auth_alg || + algs[pos] == 0xff) + continue; + if (algs[pos] == WLAN_AUTH_SHARED_KEY && + !ieee80211_sta_wep_configured(dev)) + continue; + ifsta->auth_alg = algs[pos]; + printk(KERN_DEBUG "%s: set auth_alg=%d for " + "next try\n", + dev->name, ifsta->auth_alg); + break; + } + } + return; + } + + switch (ifsta->auth_alg) { + case WLAN_AUTH_OPEN: + case WLAN_AUTH_LEAP: + ieee80211_auth_completed(dev, ifsta); + break; + case WLAN_AUTH_SHARED_KEY: + if (ifsta->auth_transaction == 4) + ieee80211_auth_completed(dev, ifsta); + else + ieee80211_auth_challenge(dev, ifsta, mgmt, len); + break; + } +} + + +static void ieee80211_rx_mgmt_deauth(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_mgmt *mgmt, + size_t len) +{ + u16 reason_code; + + if (len < 24 + 2) { + printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " + "received from " MAC_FMT " - ignored\n", + dev->name, len, MAC_ARG(mgmt->sa)); + return; + } + + if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { + printk(KERN_DEBUG "%s: deauthentication frame received from " + "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " + "ignored\n", dev->name, MAC_ARG(mgmt->sa), + MAC_ARG(mgmt->bssid)); + return; + } + + reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); + + printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT + " (reason=%d)\n", + dev->name, MAC_ARG(mgmt->sa), reason_code); + + if (ifsta->authenticated) { + printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); + } + + if (ifsta->state == IEEE80211_AUTHENTICATE || + ifsta->state == IEEE80211_ASSOCIATE || + ifsta->state == IEEE80211_ASSOCIATED) { + ifsta->state = IEEE80211_AUTHENTICATE; + mod_timer(&ifsta->timer, jiffies + + IEEE80211_RETRY_AUTH_INTERVAL); + } + + ieee80211_set_disassoc(dev, ifsta, 1); + ifsta->authenticated = 0; +} + + +static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_mgmt *mgmt, + size_t len) +{ + u16 reason_code; + + if (len < 24 + 2) { + printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " + "received from " MAC_FMT " - ignored\n", + dev->name, len, MAC_ARG(mgmt->sa)); + return; + } + + if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { + printk(KERN_DEBUG "%s: disassociation frame received from " + "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " + "ignored\n", dev->name, MAC_ARG(mgmt->sa), + MAC_ARG(mgmt->bssid)); + return; + } + + reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); + + printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT + " (reason=%d)\n", + dev->name, MAC_ARG(mgmt->sa), reason_code); + + if (ifsta->associated) + printk(KERN_DEBUG "%s: disassociated\n", dev->name); + + if (ifsta->state == IEEE80211_ASSOCIATED) { + ifsta->state = IEEE80211_ASSOCIATE; + mod_timer(&ifsta->timer, jiffies + + IEEE80211_RETRY_AUTH_INTERVAL); + } + + ieee80211_set_disassoc(dev, ifsta, 0); +} + + +static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_mgmt *mgmt, + size_t len, + int reassoc) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw_mode *mode; + struct sta_info *sta; + u32 rates; + u16 capab_info, status_code, aid; + struct ieee802_11_elems elems; + u8 *pos; + int i, j; + + /* AssocResp and ReassocResp have identical structure, so process both + * of them in this function. */ + + if (ifsta->state != IEEE80211_ASSOCIATE) { + printk(KERN_DEBUG "%s: association frame received from " + MAC_FMT ", but not in associate state - ignored\n", + dev->name, MAC_ARG(mgmt->sa)); + return; + } + + if (len < 24 + 6) { + printk(KERN_DEBUG "%s: too short (%zd) association frame " + "received from " MAC_FMT " - ignored\n", + dev->name, len, MAC_ARG(mgmt->sa)); + return; + } + + if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { + printk(KERN_DEBUG "%s: association frame received from " + "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " + "ignored\n", dev->name, MAC_ARG(mgmt->sa), + MAC_ARG(mgmt->bssid)); + return; + } + + capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); + status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); + aid = le16_to_cpu(mgmt->u.assoc_resp.aid); + if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) + printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " + "set\n", dev->name, aid); + aid &= ~(BIT(15) | BIT(14)); + + printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x " + "status=%d aid=%d)\n", + dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa), + capab_info, status_code, aid); + + if (status_code != WLAN_STATUS_SUCCESS) { + printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", + dev->name, status_code); + return; + } + + pos = mgmt->u.assoc_resp.variable; + if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) + == ParseFailed) { + printk(KERN_DEBUG "%s: failed to parse AssocResp\n", + dev->name); + return; + } + + if (!elems.supp_rates) { + printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", + dev->name); + return; + } + + printk(KERN_DEBUG "%s: associated\n", dev->name); + ifsta->aid = aid; + ifsta->ap_capab = capab_info; + + kfree(ifsta->assocresp_ies); + ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); + ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC); + if (ifsta->assocresp_ies) + memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); + + ieee80211_set_associated(dev, ifsta, 1); + + /* Add STA entry for the AP */ + sta = sta_info_get(local, ifsta->bssid); + if (!sta) { + struct ieee80211_sta_bss *bss; + sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC); + if (!sta) { + printk(KERN_DEBUG "%s: failed to add STA entry for the" + " AP\n", dev->name); + return; + } + bss = ieee80211_rx_bss_get(dev, ifsta->bssid); + if (bss) { + sta->last_rssi = bss->rssi; + sta->last_signal = bss->signal; + sta->last_noise = bss->noise; + ieee80211_rx_bss_put(dev, bss); + } + } + + sta->dev = dev; + sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC; + sta->assoc_ap = 1; + + rates = 0; + mode = local->oper_hw_mode; + for (i = 0; i < elems.supp_rates_len; i++) { + int rate = (elems.supp_rates[i] & 0x7f) * 5; + if (mode->mode == MODE_ATHEROS_TURBO) + rate *= 2; + for (j = 0; j < mode->num_rates; j++) + if (mode->rates[j].rate == rate) + rates |= BIT(j); + } + for (i = 0; i < elems.ext_supp_rates_len; i++) { + int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; + if (mode->mode == MODE_ATHEROS_TURBO) + rate *= 2; + for (j = 0; j < mode->num_rates; j++) + if (mode->rates[j].rate == rate) + rates |= BIT(j); + } + sta->supp_rates = rates; + + rate_control_rate_init(sta, local); + + if (elems.wmm_param && ifsta->wmm_enabled) { + sta->flags |= WLAN_STA_WME; + ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, + elems.wmm_param_len); + } + + + sta_info_put(sta); + + ieee80211_associated(dev, ifsta); +} + + +/* Caller must hold local->sta_bss_lock */ +static void __ieee80211_rx_bss_hash_add(struct net_device *dev, + struct ieee80211_sta_bss *bss) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; + local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; +} + + +/* Caller must hold local->sta_bss_lock */ +static void __ieee80211_rx_bss_hash_del(struct net_device *dev, + struct ieee80211_sta_bss *bss) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sta_bss *b, *prev = NULL; + b = local->sta_bss_hash[STA_HASH(bss->bssid)]; + while (b) { + if (b == bss) { + if (!prev) + local->sta_bss_hash[STA_HASH(bss->bssid)] = + bss->hnext; + else + prev->hnext = bss->hnext; + break; + } + prev = b; + b = b->hnext; + } +} + + +static struct ieee80211_sta_bss * +ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sta_bss *bss; + + bss = kmalloc(sizeof(*bss), GFP_ATOMIC); + if (!bss) + return NULL; + memset(bss, 0, sizeof(*bss)); + atomic_inc(&bss->users); + atomic_inc(&bss->users); + memcpy(bss->bssid, bssid, ETH_ALEN); + + spin_lock_bh(&local->sta_bss_lock); + /* TODO: order by RSSI? */ + list_add_tail(&bss->list, &local->sta_bss_list); + __ieee80211_rx_bss_hash_add(dev, bss); + spin_unlock_bh(&local->sta_bss_lock); + return bss; +} + + +static struct ieee80211_sta_bss * +ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sta_bss *bss; + + spin_lock_bh(&local->sta_bss_lock); + bss = local->sta_bss_hash[STA_HASH(bssid)]; + while (bss) { + if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) { + atomic_inc(&bss->users); + break; + } + bss = bss->hnext; + } + spin_unlock_bh(&local->sta_bss_lock); + return bss; +} + + +static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) +{ + kfree(bss->wpa_ie); + kfree(bss->rsn_ie); + kfree(bss->wmm_ie); + kfree(bss); +} + + +static void ieee80211_rx_bss_put(struct net_device *dev, + struct ieee80211_sta_bss *bss) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + if (!atomic_dec_and_test(&bss->users)) + return; + + spin_lock_bh(&local->sta_bss_lock); + __ieee80211_rx_bss_hash_del(dev, bss); + list_del(&bss->list); + spin_unlock_bh(&local->sta_bss_lock); + ieee80211_rx_bss_free(bss); +} + + +void ieee80211_rx_bss_list_init(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + spin_lock_init(&local->sta_bss_lock); + INIT_LIST_HEAD(&local->sta_bss_list); +} + + +void ieee80211_rx_bss_list_deinit(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sta_bss *bss, *tmp; + + list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) + ieee80211_rx_bss_put(dev, bss); +} + + +static void ieee80211_rx_bss_info(struct net_device *dev, + struct ieee80211_mgmt *mgmt, + size_t len, + struct ieee80211_rx_status *rx_status, + int beacon) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee802_11_elems elems; + size_t baselen; + int channel, invalid = 0, clen; + struct ieee80211_sta_bss *bss; + struct sta_info *sta; + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + u64 timestamp; + + if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) + return; /* ignore ProbeResp to foreign address */ + +#if 0 + printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n", + dev->name, beacon ? "Beacon" : "Probe Response", + MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da)); +#endif + + baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; + if (baselen > len) + return; + + timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); + + if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon && + memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { +#ifdef CONFIG_MAC80211_IBSS_DEBUG + static unsigned long last_tsf_debug = 0; + u64 tsf; + if (local->ops->get_tsf) + tsf = local->ops->get_tsf(local_to_hw(local)); + else + tsf = -1LLU; + if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { + printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID=" + MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld " + "@%lu\n", + MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid), + (unsigned long long)tsf, + (unsigned long long)timestamp, + (unsigned long long)(tsf - timestamp), + jiffies); + last_tsf_debug = jiffies; + } +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + } + + if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, + &elems) == ParseFailed) + invalid = 1; + + if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && + memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && + (sta = sta_info_get(local, mgmt->sa))) { + struct ieee80211_hw_mode *mode; + struct ieee80211_rate *rates; + size_t num_rates; + u32 supp_rates, prev_rates; + int i, j; + + mode = local->sta_scanning ? + local->scan_hw_mode : local->oper_hw_mode; + rates = mode->rates; + num_rates = mode->num_rates; + + supp_rates = 0; + for (i = 0; i < elems.supp_rates_len + + elems.ext_supp_rates_len; i++) { + u8 rate = 0; + int own_rate; + if (i < elems.supp_rates_len) + rate = elems.supp_rates[i]; + else if (elems.ext_supp_rates) + rate = elems.ext_supp_rates + [i - elems.supp_rates_len]; + own_rate = 5 * (rate & 0x7f); + if (mode->mode == MODE_ATHEROS_TURBO) + own_rate *= 2; + for (j = 0; j < num_rates; j++) + if (rates[j].rate == own_rate) + supp_rates |= BIT(j); + } + + prev_rates = sta->supp_rates; + sta->supp_rates &= supp_rates; + if (sta->supp_rates == 0) { + /* No matching rates - this should not really happen. + * Make sure that at least one rate is marked + * supported to avoid issues with TX rate ctrl. */ + sta->supp_rates = sdata->u.sta.supp_rates_bits; + } + if (sta->supp_rates != prev_rates) { + printk(KERN_DEBUG "%s: updated supp_rates set for " + MAC_FMT " based on beacon info (0x%x & 0x%x -> " + "0x%x)\n", + dev->name, MAC_ARG(sta->addr), prev_rates, + supp_rates, sta->supp_rates); + } + sta_info_put(sta); + } + + if (!elems.ssid) + return; + + if (elems.ds_params && elems.ds_params_len == 1) + channel = elems.ds_params[0]; + else + channel = rx_status->channel; + + bss = ieee80211_rx_bss_get(dev, mgmt->bssid); + if (!bss) { + bss = ieee80211_rx_bss_add(dev, mgmt->bssid); + if (!bss) + return; + } else { +#if 0 + /* TODO: order by RSSI? */ + spin_lock_bh(&local->sta_bss_lock); + list_move_tail(&bss->list, &local->sta_bss_list); + spin_unlock_bh(&local->sta_bss_lock); +#endif + } + + if (bss->probe_resp && beacon) { + /* Do not allow beacon to override data from Probe Response. */ + ieee80211_rx_bss_put(dev, bss); + return; + } + + bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); + bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); + if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) { + memcpy(bss->ssid, elems.ssid, elems.ssid_len); + bss->ssid_len = elems.ssid_len; + } + + bss->supp_rates_len = 0; + if (elems.supp_rates) { + clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; + if (clen > elems.supp_rates_len) + clen = elems.supp_rates_len; + memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, + clen); + bss->supp_rates_len += clen; + } + if (elems.ext_supp_rates) { + clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; + if (clen > elems.ext_supp_rates_len) + clen = elems.ext_supp_rates_len; + memcpy(&bss->supp_rates[bss->supp_rates_len], + elems.ext_supp_rates, clen); + bss->supp_rates_len += clen; + } + + if (elems.wpa && + (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || + memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { + kfree(bss->wpa_ie); + bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); + if (bss->wpa_ie) { + memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); + bss->wpa_ie_len = elems.wpa_len + 2; + } else + bss->wpa_ie_len = 0; + } else if (!elems.wpa && bss->wpa_ie) { + kfree(bss->wpa_ie); + bss->wpa_ie = NULL; + bss->wpa_ie_len = 0; + } + + if (elems.rsn && + (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || + memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { + kfree(bss->rsn_ie); + bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); + if (bss->rsn_ie) { + memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); + bss->rsn_ie_len = elems.rsn_len + 2; + } else + bss->rsn_ie_len = 0; + } else if (!elems.rsn && bss->rsn_ie) { + kfree(bss->rsn_ie); + bss->rsn_ie = NULL; + bss->rsn_ie_len = 0; + } + + if (elems.wmm_param && + (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || + memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { + kfree(bss->wmm_ie); + bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); + if (bss->wmm_ie) { + memcpy(bss->wmm_ie, elems.wmm_param - 2, + elems.wmm_param_len + 2); + bss->wmm_ie_len = elems.wmm_param_len + 2; + } else + bss->wmm_ie_len = 0; + } else if (!elems.wmm_param && bss->wmm_ie) { + kfree(bss->wmm_ie); + bss->wmm_ie = NULL; + bss->wmm_ie_len = 0; + } + + + bss->hw_mode = rx_status->phymode; + bss->channel = channel; + bss->freq = rx_status->freq; + if (channel != rx_status->channel && + (bss->hw_mode == MODE_IEEE80211G || + bss->hw_mode == MODE_IEEE80211B) && + channel >= 1 && channel <= 14) { + static const int freq_list[] = { + 2412, 2417, 2422, 2427, 2432, 2437, 2442, + 2447, 2452, 2457, 2462, 2467, 2472, 2484 + }; + /* IEEE 802.11g/b mode can receive packets from neighboring + * channels, so map the channel into frequency. */ + bss->freq = freq_list[channel - 1]; + } + bss->timestamp = timestamp; + bss->last_update = jiffies; + bss->rssi = rx_status->ssi; + bss->signal = rx_status->signal; + bss->noise = rx_status->noise; + if (!beacon) + bss->probe_resp++; + ieee80211_rx_bss_put(dev, bss); +} + + +static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, + struct ieee80211_mgmt *mgmt, + size_t len, + struct ieee80211_rx_status *rx_status) +{ + ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); +} + + +static void ieee80211_rx_mgmt_beacon(struct net_device *dev, + struct ieee80211_mgmt *mgmt, + size_t len, + struct ieee80211_rx_status *rx_status) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + struct ieee80211_if_sta *ifsta; + int use_protection; + size_t baselen; + struct ieee802_11_elems elems; + + ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type != IEEE80211_IF_TYPE_STA) + return; + ifsta = &sdata->u.sta; + + if (!ifsta->associated || + memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) + return; + + /* Process beacon from the current BSS */ + baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; + if (baselen > len) + return; + + if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, + &elems) == ParseFailed) + return; + + use_protection = 0; + if (elems.erp_info && elems.erp_info_len >= 1) { + use_protection = + (elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0; + } + + if (use_protection != !!ifsta->use_protection) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" + MAC_FMT ")\n", + dev->name, + use_protection ? "enabled" : "disabled", + MAC_ARG(ifsta->bssid)); + } + ifsta->use_protection = use_protection ? 1 : 0; + local->cts_protect_erp_frames = use_protection; + } + + if (elems.wmm_param && ifsta->wmm_enabled) { + ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, + elems.wmm_param_len); + } +} + + +static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_mgmt *mgmt, + size_t len, + struct ieee80211_rx_status *rx_status) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + int tx_last_beacon; + struct sk_buff *skb; + struct ieee80211_mgmt *resp; + u8 *pos, *end; + + if (sdata->type != IEEE80211_IF_TYPE_IBSS || + ifsta->state != IEEE80211_IBSS_JOINED || + len < 24 + 2 || !ifsta->probe_resp) + return; + + if (local->ops->tx_last_beacon) + tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); + else + tx_last_beacon = 1; + +#ifdef CONFIG_MAC80211_IBSS_DEBUG + printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID=" + MAC_FMT " (tx_last_beacon=%d)\n", + dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da), + MAC_ARG(mgmt->bssid), tx_last_beacon); +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + + if (!tx_last_beacon) + return; + + if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && + memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) + return; + + end = ((u8 *) mgmt) + len; + pos = mgmt->u.probe_req.variable; + if (pos[0] != WLAN_EID_SSID || + pos + 2 + pos[1] > end) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " + "from " MAC_FMT "\n", + dev->name, MAC_ARG(mgmt->sa)); + } + return; + } + if (pos[1] != 0 && + (pos[1] != ifsta->ssid_len || + memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { + /* Ignore ProbeReq for foreign SSID */ + return; + } + + /* Reply with ProbeResp */ + skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC); + if (!skb) + return; + + resp = (struct ieee80211_mgmt *) skb->data; + memcpy(resp->da, mgmt->sa, ETH_ALEN); +#ifdef CONFIG_MAC80211_IBSS_DEBUG + printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n", + dev->name, MAC_ARG(resp->da)); +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + ieee80211_sta_tx(dev, skb, 0); +} + + +void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, + struct ieee80211_rx_status *rx_status) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + struct ieee80211_if_sta *ifsta; + struct ieee80211_mgmt *mgmt; + u16 fc; + + if (skb->len < 24) + goto fail; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + ifsta = &sdata->u.sta; + + mgmt = (struct ieee80211_mgmt *) skb->data; + fc = le16_to_cpu(mgmt->frame_control); + + switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_PROBE_REQ: + case IEEE80211_STYPE_PROBE_RESP: + case IEEE80211_STYPE_BEACON: + memcpy(skb->cb, rx_status, sizeof(*rx_status)); + case IEEE80211_STYPE_AUTH: + case IEEE80211_STYPE_ASSOC_RESP: + case IEEE80211_STYPE_REASSOC_RESP: + case IEEE80211_STYPE_DEAUTH: + case IEEE80211_STYPE_DISASSOC: + skb_queue_tail(&ifsta->skb_queue, skb); + queue_work(local->hw.workqueue, &ifsta->work); + return; + default: + printk(KERN_DEBUG "%s: received unknown management frame - " + "stype=%d\n", dev->name, + (fc & IEEE80211_FCTL_STYPE) >> 4); + break; + } + + fail: + kfree_skb(skb); +} + + +static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, + struct sk_buff *skb) +{ + struct ieee80211_rx_status *rx_status; + struct ieee80211_sub_if_data *sdata; + struct ieee80211_if_sta *ifsta; + struct ieee80211_mgmt *mgmt; + u16 fc; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + ifsta = &sdata->u.sta; + + rx_status = (struct ieee80211_rx_status *) skb->cb; + mgmt = (struct ieee80211_mgmt *) skb->data; + fc = le16_to_cpu(mgmt->frame_control); + + switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_PROBE_REQ: + ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, + rx_status); + break; + case IEEE80211_STYPE_PROBE_RESP: + ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); + break; + case IEEE80211_STYPE_BEACON: + ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); + break; + case IEEE80211_STYPE_AUTH: + ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); + break; + case IEEE80211_STYPE_ASSOC_RESP: + ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0); + break; + case IEEE80211_STYPE_REASSOC_RESP: + ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1); + break; + case IEEE80211_STYPE_DEAUTH: + ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); + break; + case IEEE80211_STYPE_DISASSOC: + ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); + break; + } + + kfree_skb(skb); +} + + +void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, + struct ieee80211_rx_status *rx_status) +{ + struct ieee80211_mgmt *mgmt; + u16 fc; + + if (skb->len < 24) { + dev_kfree_skb(skb); + return; + } + + mgmt = (struct ieee80211_mgmt *) skb->data; + fc = le16_to_cpu(mgmt->frame_control); + + if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { + if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { + ieee80211_rx_mgmt_probe_resp(dev, mgmt, + skb->len, rx_status); + } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { + ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, + rx_status); + } + } + + dev_kfree_skb(skb); +} + + +static int ieee80211_sta_active_ibss(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + int active = 0; + struct sta_info *sta; + + spin_lock_bh(&local->sta_lock); + list_for_each_entry(sta, &local->sta_list, list) { + if (sta->dev == dev && + time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, + jiffies)) { + active++; + break; + } + } + spin_unlock_bh(&local->sta_lock); + + return active; +} + + +static void ieee80211_sta_expire(struct net_device *dev) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta, *tmp; + + spin_lock_bh(&local->sta_lock); + list_for_each_entry_safe(sta, tmp, &local->sta_list, list) + if (time_after(jiffies, sta->last_rx + + IEEE80211_IBSS_INACTIVITY_LIMIT)) { + printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT + "\n", dev->name, MAC_ARG(sta->addr)); + sta_info_free(sta, 1); + } + spin_unlock_bh(&local->sta_lock); +} + + +static void ieee80211_sta_merge_ibss(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); + + ieee80211_sta_expire(dev); + if (ieee80211_sta_active_ibss(dev)) + return; + + printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " + "IBSS networks with same SSID (merge)\n", dev->name); + ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); +} + + +void ieee80211_sta_timer(unsigned long data) +{ + struct ieee80211_sub_if_data *sdata = + (struct ieee80211_sub_if_data *) data; + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + struct ieee80211_local *local = wdev_priv(&sdata->wdev); + + set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); + queue_work(local->hw.workqueue, &ifsta->work); +} + + +void ieee80211_sta_work(struct work_struct *work) +{ + struct ieee80211_sub_if_data *sdata = + container_of(work, struct ieee80211_sub_if_data, u.sta.work); + struct net_device *dev = sdata->dev; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_if_sta *ifsta; + struct sk_buff *skb; + + if (!netif_running(dev)) + return; + + if (local->sta_scanning) + return; + + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) { + printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " + "(type=%d)\n", dev->name, sdata->type); + return; + } + ifsta = &sdata->u.sta; + + while ((skb = skb_dequeue(&ifsta->skb_queue))) + ieee80211_sta_rx_queued_mgmt(dev, skb); + + if (ifsta->state != IEEE80211_AUTHENTICATE && + ifsta->state != IEEE80211_ASSOCIATE && + test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { + ieee80211_sta_start_scan(dev, NULL, 0); + return; + } + + if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { + if (ieee80211_sta_config_auth(dev, ifsta)) + return; + clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); + } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) + return; + + switch (ifsta->state) { + case IEEE80211_DISABLED: + break; + case IEEE80211_AUTHENTICATE: + ieee80211_authenticate(dev, ifsta); + break; + case IEEE80211_ASSOCIATE: + ieee80211_associate(dev, ifsta); + break; + case IEEE80211_ASSOCIATED: + ieee80211_associated(dev, ifsta); + break; + case IEEE80211_IBSS_SEARCH: + ieee80211_sta_find_ibss(dev, ifsta); + break; + case IEEE80211_IBSS_JOINED: + ieee80211_sta_merge_ibss(dev, ifsta); + break; + default: + printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", + ifsta->state); + break; + } + + if (ieee80211_privacy_mismatch(dev, ifsta)) { + printk(KERN_DEBUG "%s: privacy configuration mismatch and " + "mixed-cell disabled - disassociate\n", dev->name); + + ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); + ieee80211_set_disassoc(dev, ifsta, 0); + } +} + + +static void ieee80211_sta_reset_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (local->ops->reset_tsf) { + /* Reset own TSF to allow time synchronization work. */ + local->ops->reset_tsf(local_to_hw(local)); + } + + ifsta->wmm_last_param_set = -1; /* allow any WMM update */ + + + if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) + ifsta->auth_alg = WLAN_AUTH_OPEN; + else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) + ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; + else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) + ifsta->auth_alg = WLAN_AUTH_LEAP; + else + ifsta->auth_alg = WLAN_AUTH_OPEN; + printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, + ifsta->auth_alg); + ifsta->auth_transaction = -1; + ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0; + netif_carrier_off(dev); +} + + +void ieee80211_sta_req_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (sdata->type != IEEE80211_IF_TYPE_STA) + return; + + if ((ifsta->bssid_set || ifsta->auto_bssid_sel) && + (ifsta->ssid_set || ifsta->auto_ssid_sel)) { + set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); + queue_work(local->hw.workqueue, &ifsta->work); + } +} + +static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, + const char *ssid, int ssid_len) +{ + int tmp, hidden_ssid; + + if (!memcmp(ifsta->ssid, ssid, ssid_len)) + return 1; + + if (ifsta->auto_bssid_sel) + return 0; + + hidden_ssid = 1; + tmp = ssid_len; + while (tmp--) { + if (ssid[tmp] != '\0') { + hidden_ssid = 0; + break; + } + } + + if (hidden_ssid && ifsta->ssid_len == ssid_len) + return 1; + + if (ssid_len == 1 && ssid[0] == ' ') + return 1; + + return 0; +} + +static int ieee80211_sta_config_auth(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_sta_bss *bss, *selected = NULL; + int top_rssi = 0, freq; + + rtnl_lock(); + + if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel && + !ifsta->auto_ssid_sel) { + ifsta->state = IEEE80211_AUTHENTICATE; + rtnl_unlock(); + ieee80211_sta_reset_auth(dev, ifsta); + return 0; + } + + spin_lock_bh(&local->sta_bss_lock); + freq = local->oper_channel->freq; + list_for_each_entry(bss, &local->sta_bss_list, list) { + if (!(bss->capability & WLAN_CAPABILITY_ESS)) + continue; + + if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ + !!sdata->default_key) + continue; + + if (!ifsta->auto_channel_sel && bss->freq != freq) + continue; + + if (!ifsta->auto_bssid_sel && + memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) + continue; + + if (!ifsta->auto_ssid_sel && + !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) + continue; + + if (!selected || top_rssi < bss->rssi) { + selected = bss; + top_rssi = bss->rssi; + } + } + if (selected) + atomic_inc(&selected->users); + spin_unlock_bh(&local->sta_bss_lock); + + if (selected) { + ieee80211_set_channel(local, -1, selected->freq); + if (!ifsta->ssid_set) + ieee80211_sta_set_ssid(dev, selected->ssid, + selected->ssid_len); + ieee80211_sta_set_bssid(dev, selected->bssid); + ieee80211_rx_bss_put(dev, selected); + ifsta->state = IEEE80211_AUTHENTICATE; + rtnl_unlock(); + ieee80211_sta_reset_auth(dev, ifsta); + return 0; + } else { + if (ifsta->state != IEEE80211_AUTHENTICATE) { + ieee80211_sta_start_scan(dev, NULL, 0); + ifsta->state = IEEE80211_AUTHENTICATE; + set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); + } else + ifsta->state = IEEE80211_DISABLED; + } + rtnl_unlock(); + return -1; +} + +static int ieee80211_sta_join_ibss(struct net_device *dev, + struct ieee80211_if_sta *ifsta, + struct ieee80211_sta_bss *bss) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + int res, rates, i, j; + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + struct ieee80211_tx_control control; + struct ieee80211_rate *rate; + struct ieee80211_hw_mode *mode; + struct rate_control_extra extra; + u8 *pos; + struct ieee80211_sub_if_data *sdata; + + /* Remove possible STA entries from other IBSS networks. */ + sta_info_flush(local, NULL); + + if (local->ops->reset_tsf) { + /* Reset own TSF to allow time synchronization work. */ + local->ops->reset_tsf(local_to_hw(local)); + } + memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); + res = ieee80211_if_config(dev); + if (res) + return res; + + local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + sdata->drop_unencrypted = bss->capability & + WLAN_CAPABILITY_PRIVACY ? 1 : 0; + + res = ieee80211_set_channel(local, -1, bss->freq); + + if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { + printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " + "(%d MHz)\n", dev->name, local->hw.conf.channel, + local->hw.conf.freq); + return -1; + } + + /* Set beacon template based on scan results */ + skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); + do { + if (!skb) + break; + + skb_reserve(skb, local->hw.extra_tx_headroom); + + mgmt = (struct ieee80211_mgmt *) + skb_put(skb, 24 + sizeof(mgmt->u.beacon)); + memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); + mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_BEACON); + memset(mgmt->da, 0xff, ETH_ALEN); + memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); + memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); + mgmt->u.beacon.beacon_int = + cpu_to_le16(local->hw.conf.beacon_int); + mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); + + pos = skb_put(skb, 2 + ifsta->ssid_len); + *pos++ = WLAN_EID_SSID; + *pos++ = ifsta->ssid_len; + memcpy(pos, ifsta->ssid, ifsta->ssid_len); + + rates = bss->supp_rates_len; + if (rates > 8) + rates = 8; + pos = skb_put(skb, 2 + rates); + *pos++ = WLAN_EID_SUPP_RATES; + *pos++ = rates; + memcpy(pos, bss->supp_rates, rates); + + pos = skb_put(skb, 2 + 1); + *pos++ = WLAN_EID_DS_PARAMS; + *pos++ = 1; + *pos++ = bss->channel; + + pos = skb_put(skb, 2 + 2); + *pos++ = WLAN_EID_IBSS_PARAMS; + *pos++ = 2; + /* FIX: set ATIM window based on scan results */ + *pos++ = 0; + *pos++ = 0; + + if (bss->supp_rates_len > 8) { + rates = bss->supp_rates_len - 8; + pos = skb_put(skb, 2 + rates); + *pos++ = WLAN_EID_EXT_SUPP_RATES; + *pos++ = rates; + memcpy(pos, &bss->supp_rates[8], rates); + } + + memset(&control, 0, sizeof(control)); + memset(&extra, 0, sizeof(extra)); + extra.mode = local->oper_hw_mode; + rate = rate_control_get_rate(local, dev, skb, &extra); + if (!rate) { + printk(KERN_DEBUG "%s: Failed to determine TX rate " + "for IBSS beacon\n", dev->name); + break; + } + control.tx_rate = (local->short_preamble && + (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? + rate->val2 : rate->val; + control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; + control.power_level = local->hw.conf.power_level; + control.flags |= IEEE80211_TXCTL_NO_ACK; + control.retry_limit = 1; + + ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); + if (ifsta->probe_resp) { + mgmt = (struct ieee80211_mgmt *) + ifsta->probe_resp->data; + mgmt->frame_control = + IEEE80211_FC(IEEE80211_FTYPE_MGMT, + IEEE80211_STYPE_PROBE_RESP); + } else { + printk(KERN_DEBUG "%s: Could not allocate ProbeResp " + "template for IBSS\n", dev->name); + } + + if (local->ops->beacon_update && + local->ops->beacon_update(local_to_hw(local), + skb, &control) == 0) { + printk(KERN_DEBUG "%s: Configured IBSS beacon " + "template based on scan results\n", dev->name); + skb = NULL; + } + + rates = 0; + mode = local->oper_hw_mode; + for (i = 0; i < bss->supp_rates_len; i++) { + int bitrate = (bss->supp_rates[i] & 0x7f) * 5; + if (mode->mode == MODE_ATHEROS_TURBO) + bitrate *= 2; + for (j = 0; j < mode->num_rates; j++) + if (mode->rates[j].rate == bitrate) + rates |= BIT(j); + } + ifsta->supp_rates_bits = rates; + } while (0); + + if (skb) { + printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " + "template\n", dev->name); + dev_kfree_skb(skb); + } + + ifsta->state = IEEE80211_IBSS_JOINED; + mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); + + ieee80211_rx_bss_put(dev, bss); + + return res; +} + + +static int ieee80211_sta_create_ibss(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sta_bss *bss; + struct ieee80211_sub_if_data *sdata; + struct ieee80211_hw_mode *mode; + u8 bssid[ETH_ALEN], *pos; + int i; + +#if 0 + /* Easier testing, use fixed BSSID. */ + memset(bssid, 0xfe, ETH_ALEN); +#else + /* Generate random, not broadcast, locally administered BSSID. Mix in + * own MAC address to make sure that devices that do not have proper + * random number generator get different BSSID. */ + get_random_bytes(bssid, ETH_ALEN); + for (i = 0; i < ETH_ALEN; i++) + bssid[i] ^= dev->dev_addr[i]; + bssid[0] &= ~0x01; + bssid[0] |= 0x02; +#endif + + printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n", + dev->name, MAC_ARG(bssid)); + + bss = ieee80211_rx_bss_add(dev, bssid); + if (!bss) + return -ENOMEM; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + mode = local->oper_hw_mode; + + if (local->hw.conf.beacon_int == 0) + local->hw.conf.beacon_int = 100; + bss->beacon_int = local->hw.conf.beacon_int; + bss->hw_mode = local->hw.conf.phymode; + bss->channel = local->hw.conf.channel; + bss->freq = local->hw.conf.freq; + bss->last_update = jiffies; + bss->capability = WLAN_CAPABILITY_IBSS; + if (sdata->default_key) { + bss->capability |= WLAN_CAPABILITY_PRIVACY; + } else + sdata->drop_unencrypted = 0; + bss->supp_rates_len = mode->num_rates; + pos = bss->supp_rates; + for (i = 0; i < mode->num_rates; i++) { + int rate = mode->rates[i].rate; + if (mode->mode == MODE_ATHEROS_TURBO) + rate /= 2; + *pos++ = (u8) (rate / 5); + } + + return ieee80211_sta_join_ibss(dev, ifsta, bss); +} + + +static int ieee80211_sta_find_ibss(struct net_device *dev, + struct ieee80211_if_sta *ifsta) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sta_bss *bss; + int found = 0; + u8 bssid[ETH_ALEN]; + int active_ibss; + + if (ifsta->ssid_len == 0) + return -EINVAL; + + active_ibss = ieee80211_sta_active_ibss(dev); +#ifdef CONFIG_MAC80211_IBSS_DEBUG + printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", + dev->name, active_ibss); +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + spin_lock_bh(&local->sta_bss_lock); + list_for_each_entry(bss, &local->sta_bss_list, list) { + if (ifsta->ssid_len != bss->ssid_len || + memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 + || !(bss->capability & WLAN_CAPABILITY_IBSS)) + continue; +#ifdef CONFIG_MAC80211_IBSS_DEBUG + printk(KERN_DEBUG " bssid=" MAC_FMT " found\n", + MAC_ARG(bss->bssid)); +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + memcpy(bssid, bss->bssid, ETH_ALEN); + found = 1; + if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) + break; + } + spin_unlock_bh(&local->sta_bss_lock); + +#ifdef CONFIG_MAC80211_IBSS_DEBUG + printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current " + MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid)); +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && + (bss = ieee80211_rx_bss_get(dev, bssid))) { + printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT + " based on configured SSID\n", + dev->name, MAC_ARG(bssid)); + return ieee80211_sta_join_ibss(dev, ifsta, bss); + } +#ifdef CONFIG_MAC80211_IBSS_DEBUG + printk(KERN_DEBUG " did not try to join ibss\n"); +#endif /* CONFIG_MAC80211_IBSS_DEBUG */ + + /* Selected IBSS not found in current scan results - try to scan */ + if (ifsta->state == IEEE80211_IBSS_JOINED && + !ieee80211_sta_active_ibss(dev)) { + mod_timer(&ifsta->timer, jiffies + + IEEE80211_IBSS_MERGE_INTERVAL); + } else if (time_after(jiffies, local->last_scan_completed + + IEEE80211_SCAN_INTERVAL)) { + printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " + "join\n", dev->name); + return ieee80211_sta_req_scan(dev, ifsta->ssid, + ifsta->ssid_len); + } else if (ifsta->state != IEEE80211_IBSS_JOINED) { + int interval = IEEE80211_SCAN_INTERVAL; + + if (time_after(jiffies, ifsta->ibss_join_req + + IEEE80211_IBSS_JOIN_TIMEOUT)) { + if (ifsta->create_ibss && + local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) + return ieee80211_sta_create_ibss(dev, ifsta); + if (ifsta->create_ibss) { + printk(KERN_DEBUG "%s: IBSS not allowed on the" + " configured channel %d (%d MHz)\n", + dev->name, local->hw.conf.channel, + local->hw.conf.freq); + } + + /* No IBSS found - decrease scan interval and continue + * scanning. */ + interval = IEEE80211_SCAN_INTERVAL_SLOW; + } + + ifsta->state = IEEE80211_IBSS_SEARCH; + mod_timer(&ifsta->timer, jiffies + interval); + return 0; + } + + return 0; +} + + +int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_if_sta *ifsta; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (len > IEEE80211_MAX_SSID_LEN) + return -EINVAL; + + /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is + * not defined. */ + if (local->ops->conf_tx) { + struct ieee80211_tx_queue_params qparam; + int i; + + memset(&qparam, 0, sizeof(qparam)); + /* TODO: are these ok defaults for all hw_modes? */ + qparam.aifs = 2; + qparam.cw_min = + local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; + qparam.cw_max = 1023; + qparam.burst_time = 0; + for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) + { + local->ops->conf_tx(local_to_hw(local), + i + IEEE80211_TX_QUEUE_DATA0, + &qparam); + } + /* IBSS uses different parameters for Beacon sending */ + qparam.cw_min++; + qparam.cw_min *= 2; + qparam.cw_min--; + local->ops->conf_tx(local_to_hw(local), + IEEE80211_TX_QUEUE_BEACON, &qparam); + } + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + ifsta = &sdata->u.sta; + + if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) + ifsta->prev_bssid_set = 0; + memcpy(ifsta->ssid, ssid, len); + memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); + ifsta->ssid_len = len; + + ifsta->ssid_set = len ? 1 : 0; + if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) { + ifsta->ibss_join_req = jiffies; + ifsta->state = IEEE80211_IBSS_SEARCH; + return ieee80211_sta_find_ibss(dev, ifsta); + } + return 0; +} + + +int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + memcpy(ssid, ifsta->ssid, ifsta->ssid_len); + *len = ifsta->ssid_len; + return 0; +} + + +int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_if_sta *ifsta; + int res; + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + ifsta = &sdata->u.sta; + + if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { + memcpy(ifsta->bssid, bssid, ETH_ALEN); + res = ieee80211_if_config(dev); + if (res) { + printk(KERN_DEBUG "%s: Failed to config new BSSID to " + "the low-level driver\n", dev->name); + return res; + } + } + + if (!is_valid_ether_addr(bssid)) + ifsta->bssid_set = 0; + else + ifsta->bssid_set = 1; + return 0; +} + + +static void ieee80211_send_nullfunc(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata, + int powersave) +{ + struct sk_buff *skb; + struct ieee80211_hdr *nullfunc; + u16 fc; + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); + if (!skb) { + printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " + "frame\n", sdata->dev->name); + return; + } + skb_reserve(skb, local->hw.extra_tx_headroom); + + nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); + memset(nullfunc, 0, 24); + fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | + IEEE80211_FCTL_TODS; + if (powersave) + fc |= IEEE80211_FCTL_PM; + nullfunc->frame_control = cpu_to_le16(fc); + memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); + memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); + memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); + + ieee80211_sta_tx(sdata->dev, skb, 0); +} + + +void ieee80211_scan_completed(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + struct net_device *dev = local->scan_dev; + struct ieee80211_sub_if_data *sdata; + union iwreq_data wrqu; + + local->last_scan_completed = jiffies; + wmb(); + local->sta_scanning = 0; + + if (ieee80211_hw_config(local)) + printk(KERN_DEBUG "%s: failed to restore operational" + "channel after scan\n", dev->name); + + if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && + ieee80211_if_config(dev)) + printk(KERN_DEBUG "%s: failed to restore operational" + "BSSID after scan\n", dev->name); + + memset(&wrqu, 0, sizeof(wrqu)); + wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + if (sdata->type == IEEE80211_IF_TYPE_STA) { + if (sdata->u.sta.associated) + ieee80211_send_nullfunc(local, sdata, 0); + ieee80211_sta_timer((unsigned long)sdata); + } + netif_wake_queue(sdata->dev); + } + read_unlock(&local->sub_if_lock); + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->type == IEEE80211_IF_TYPE_IBSS) { + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + if (!ifsta->bssid_set || + (!ifsta->state == IEEE80211_IBSS_JOINED && + !ieee80211_sta_active_ibss(dev))) + ieee80211_sta_find_ibss(dev, ifsta); + } +} +EXPORT_SYMBOL(ieee80211_scan_completed); + +void ieee80211_sta_scan_work(struct work_struct *work) +{ + struct ieee80211_local *local = + container_of(work, struct ieee80211_local, scan_work.work); + struct net_device *dev = local->scan_dev; + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_hw_mode *mode; + struct ieee80211_channel *chan; + int skip; + unsigned long next_delay = 0; + + if (!local->sta_scanning) + return; + + switch (local->scan_state) { + case SCAN_SET_CHANNEL: + mode = local->scan_hw_mode; + if (local->scan_hw_mode->list.next == &local->modes_list && + local->scan_channel_idx >= mode->num_channels) { + ieee80211_scan_completed(local_to_hw(local)); + return; + } + skip = !(local->enabled_modes & (1 << mode->mode)); + chan = &mode->channels[local->scan_channel_idx]; + if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || + (sdata->type == IEEE80211_IF_TYPE_IBSS && + !(chan->flag & IEEE80211_CHAN_W_IBSS)) || + (local->hw_modes & local->enabled_modes & + (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) + skip = 1; + + if (!skip) { +#if 0 + printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", + dev->name, chan->chan, chan->freq); +#endif + + local->scan_channel = chan; + if (ieee80211_hw_config(local)) { + printk(KERN_DEBUG "%s: failed to set channel " + "%d (%d MHz) for scan\n", dev->name, + chan->chan, chan->freq); + skip = 1; + } + } + + local->scan_channel_idx++; + if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { + if (local->scan_hw_mode->list.next != &local->modes_list) { + local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, + struct ieee80211_hw_mode, + list); + local->scan_channel_idx = 0; + } + } + + if (skip) + break; + + next_delay = IEEE80211_PROBE_DELAY + + usecs_to_jiffies(local->hw.channel_change_time); + local->scan_state = SCAN_SEND_PROBE; + break; + case SCAN_SEND_PROBE: + if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { + ieee80211_send_probe_req(dev, NULL, local->scan_ssid, + local->scan_ssid_len); + next_delay = IEEE80211_CHANNEL_TIME; + } else + next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; + local->scan_state = SCAN_SET_CHANNEL; + break; + } + + if (local->sta_scanning) + queue_delayed_work(local->hw.workqueue, &local->scan_work, + next_delay); +} + + +static int ieee80211_sta_start_scan(struct net_device *dev, + u8 *ssid, size_t ssid_len) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + + if (ssid_len > IEEE80211_MAX_SSID_LEN) + return -EINVAL; + + /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) + * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS + * BSSID: MACAddress + * SSID + * ScanType: ACTIVE, PASSIVE + * ProbeDelay: delay (in microseconds) to be used prior to transmitting + * a Probe frame during active scanning + * ChannelList + * MinChannelTime (>= ProbeDelay), in TU + * MaxChannelTime: (>= MinChannelTime), in TU + */ + + /* MLME-SCAN.confirm + * BSSDescriptionSet + * ResultCode: SUCCESS, INVALID_PARAMETERS + */ + + if (local->sta_scanning) { + if (local->scan_dev == dev) + return 0; + return -EBUSY; + } + + if (local->ops->hw_scan) { + int rc = local->ops->hw_scan(local_to_hw(local), + ssid, ssid_len); + if (!rc) { + local->sta_scanning = 1; + local->scan_dev = dev; + } + return rc; + } + + local->sta_scanning = 1; + + read_lock(&local->sub_if_lock); + list_for_each_entry(sdata, &local->sub_if_list, list) { + netif_stop_queue(sdata->dev); + if (sdata->type == IEEE80211_IF_TYPE_STA && + sdata->u.sta.associated) + ieee80211_send_nullfunc(local, sdata, 1); + } + read_unlock(&local->sub_if_lock); + + if (ssid) { + local->scan_ssid_len = ssid_len; + memcpy(local->scan_ssid, ssid, ssid_len); + } else + local->scan_ssid_len = 0; + local->scan_state = SCAN_SET_CHANNEL; + local->scan_hw_mode = list_entry(local->modes_list.next, + struct ieee80211_hw_mode, + list); + local->scan_channel_idx = 0; + local->scan_dev = dev; + + if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && + ieee80211_if_config(dev)) + printk(KERN_DEBUG "%s: failed to set BSSID for scan\n", + dev->name); + + /* TODO: start scan as soon as all nullfunc frames are ACKed */ + queue_delayed_work(local->hw.workqueue, &local->scan_work, + IEEE80211_CHANNEL_TIME); + + return 0; +} + + +int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + + if (sdata->type != IEEE80211_IF_TYPE_STA) + return ieee80211_sta_start_scan(dev, ssid, ssid_len); + + if (local->sta_scanning) { + if (local->scan_dev == dev) + return 0; + return -EBUSY; + } + + set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); + queue_work(local->hw.workqueue, &ifsta->work); + return 0; +} + +static char * +ieee80211_sta_scan_result(struct net_device *dev, + struct ieee80211_sta_bss *bss, + char *current_ev, char *end_buf) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct iw_event iwe; + + if (time_after(jiffies, + bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) + return current_ev; + + if (!(local->enabled_modes & (1 << bss->hw_mode))) + return current_ev; + + if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY && + !bss->wpa_ie && !bss->rsn_ie) + return current_ev; + + if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID && + (local->scan_ssid_len != bss->ssid_len || + memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0)) + return current_ev; + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWAP; + iwe.u.ap_addr.sa_family = ARPHRD_ETHER; + memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); + current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, + IW_EV_ADDR_LEN); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWESSID; + iwe.u.data.length = bss->ssid_len; + iwe.u.data.flags = 1; + current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, + bss->ssid); + + if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWMODE; + if (bss->capability & WLAN_CAPABILITY_ESS) + iwe.u.mode = IW_MODE_MASTER; + else + iwe.u.mode = IW_MODE_ADHOC; + current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, + IW_EV_UINT_LEN); + } + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWFREQ; + iwe.u.freq.m = bss->channel; + iwe.u.freq.e = 0; + current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, + IW_EV_FREQ_LEN); + iwe.u.freq.m = bss->freq * 100000; + iwe.u.freq.e = 1; + current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, + IW_EV_FREQ_LEN); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVQUAL; + iwe.u.qual.qual = bss->signal; + iwe.u.qual.level = bss->rssi; + iwe.u.qual.noise = bss->noise; + iwe.u.qual.updated = local->wstats_flags; + current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, + IW_EV_QUAL_LEN); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWENCODE; + if (bss->capability & WLAN_CAPABILITY_PRIVACY) + iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; + else + iwe.u.data.flags = IW_ENCODE_DISABLED; + iwe.u.data.length = 0; + current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); + + if (bss && bss->wpa_ie) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVGENIE; + iwe.u.data.length = bss->wpa_ie_len; + current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, + bss->wpa_ie); + } + + if (bss && bss->rsn_ie) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVGENIE; + iwe.u.data.length = bss->rsn_ie_len; + current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, + bss->rsn_ie); + } + + if (bss && bss->supp_rates_len > 0) { + /* display all supported rates in readable format */ + char *p = current_ev + IW_EV_LCP_LEN; + int i; + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = SIOCGIWRATE; + /* Those two flags are ignored... */ + iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; + + for (i = 0; i < bss->supp_rates_len; i++) { + iwe.u.bitrate.value = ((bss->supp_rates[i] & + 0x7f) * 500000); + p = iwe_stream_add_value(current_ev, p, + end_buf, &iwe, IW_EV_PARAM_LEN); + } + current_ev = p; + } + + if (bss) { + char *buf; + buf = kmalloc(30, GFP_ATOMIC); + if (buf) { + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVCUSTOM; + sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(current_ev, end_buf, + &iwe, buf); + kfree(buf); + } + } + + do { + char *buf; + + if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO)) + break; + + buf = kmalloc(100, GFP_ATOMIC); + if (!buf) + break; + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVCUSTOM; + sprintf(buf, "bcn_int=%d", bss->beacon_int); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, + buf); + + memset(&iwe, 0, sizeof(iwe)); + iwe.cmd = IWEVCUSTOM; + sprintf(buf, "capab=0x%04x", bss->capability); + iwe.u.data.length = strlen(buf); + current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, + buf); + + kfree(buf); + break; + } while (0); + + return current_ev; +} + + +int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + char *current_ev = buf; + char *end_buf = buf + len; + struct ieee80211_sta_bss *bss; + + spin_lock_bh(&local->sta_bss_lock); + list_for_each_entry(bss, &local->sta_bss_list, list) { + if (buf + len - current_ev <= IW_EV_ADDR_LEN) { + spin_unlock_bh(&local->sta_bss_lock); + return -E2BIG; + } + current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, + end_buf); + } + spin_unlock_bh(&local->sta_bss_lock); + return current_ev - buf; +} + + +int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + kfree(ifsta->extra_ie); + if (len == 0) { + ifsta->extra_ie = NULL; + ifsta->extra_ie_len = 0; + return 0; + } + ifsta->extra_ie = kmalloc(len, GFP_KERNEL); + if (!ifsta->extra_ie) { + ifsta->extra_ie_len = 0; + return -ENOMEM; + } + memcpy(ifsta->extra_ie, ie, len); + ifsta->extra_ie_len = len; + return 0; +} + + +struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, + struct sk_buff *skb, u8 *bssid, + u8 *addr) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct sta_info *sta; + struct ieee80211_sub_if_data *sdata = NULL; + + /* TODO: Could consider removing the least recently used entry and + * allow new one to be added. */ + if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: No room for a new IBSS STA " + "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr)); + } + return NULL; + } + + printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n", + local->mdev->name, MAC_ARG(addr), dev->name); + + sta = sta_info_add(local, dev, addr, GFP_ATOMIC); + if (!sta) + return NULL; + + sta->supp_rates = sdata->u.sta.supp_rates_bits; + + rate_control_rate_init(sta, local); + + return sta; /* caller will call sta_info_put() */ +} + + +int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + + printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", + dev->name, reason); + + if (sdata->type != IEEE80211_IF_TYPE_STA && + sdata->type != IEEE80211_IF_TYPE_IBSS) + return -EINVAL; + + ieee80211_send_deauth(dev, ifsta, reason); + ieee80211_set_disassoc(dev, ifsta, 1); + return 0; +} + + +int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_if_sta *ifsta = &sdata->u.sta; + + printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", + dev->name, reason); + + if (sdata->type != IEEE80211_IF_TYPE_STA) + return -EINVAL; + + if (!ifsta->associated) + return -1; + + ieee80211_send_disassoc(dev, ifsta, reason); + ieee80211_set_disassoc(dev, ifsta, 0); + return 0; +} diff --git a/net/mac80211/michael.c b/net/mac80211/michael.c new file mode 100644 index 00000000000..0f844f7895f --- /dev/null +++ b/net/mac80211/michael.c @@ -0,0 +1,104 @@ +/* + * Michael MIC implementation - optimized for TKIP MIC operations + * Copyright 2002-2003, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/types.h> + +#include "michael.h" + +static inline u32 rotr(u32 val, int bits) +{ + return (val >> bits) | (val << (32 - bits)); +} + + +static inline u32 rotl(u32 val, int bits) +{ + return (val << bits) | (val >> (32 - bits)); +} + + +static inline u32 xswap(u32 val) +{ + return ((val & 0xff00ff00) >> 8) | ((val & 0x00ff00ff) << 8); +} + + +#define michael_block(l, r) \ +do { \ + r ^= rotl(l, 17); \ + l += r; \ + r ^= xswap(l); \ + l += r; \ + r ^= rotl(l, 3); \ + l += r; \ + r ^= rotr(l, 2); \ + l += r; \ +} while (0) + + +static inline u32 michael_get32(u8 *data) +{ + return data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24); +} + + +static inline void michael_put32(u32 val, u8 *data) +{ + data[0] = val & 0xff; + data[1] = (val >> 8) & 0xff; + data[2] = (val >> 16) & 0xff; + data[3] = (val >> 24) & 0xff; +} + + +void michael_mic(u8 *key, u8 *da, u8 *sa, u8 priority, + u8 *data, size_t data_len, u8 *mic) +{ + u32 l, r, val; + size_t block, blocks, left; + + l = michael_get32(key); + r = michael_get32(key + 4); + + /* A pseudo header (DA, SA, Priority, 0, 0, 0) is used in Michael MIC + * calculation, but it is _not_ transmitted */ + l ^= michael_get32(da); + michael_block(l, r); + l ^= da[4] | (da[5] << 8) | (sa[0] << 16) | (sa[1] << 24); + michael_block(l, r); + l ^= michael_get32(&sa[2]); + michael_block(l, r); + l ^= priority; + michael_block(l, r); + + /* Real data */ + blocks = data_len / 4; + left = data_len % 4; + + for (block = 0; block < blocks; block++) { + l ^= michael_get32(&data[block * 4]); + michael_block(l, r); + } + + /* Partial block of 0..3 bytes and padding: 0x5a + 4..7 zeros to make + * total length a multiple of 4. */ + val = 0x5a; + while (left > 0) { + val <<= 8; + left--; + val |= data[blocks * 4 + left]; + } + l ^= val; + michael_block(l, r); + /* last block is zero, so l ^ 0 = l */ + michael_block(l, r); + + michael_put32(l, mic); + michael_put32(r, mic + 4); +} diff --git a/net/mac80211/michael.h b/net/mac80211/michael.h new file mode 100644 index 00000000000..2e6aebabeea --- /dev/null +++ b/net/mac80211/michael.h @@ -0,0 +1,20 @@ +/* + * Michael MIC implementation - optimized for TKIP MIC operations + * Copyright 2002-2003, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef MICHAEL_H +#define MICHAEL_H + +#include <linux/types.h> + +#define MICHAEL_MIC_LEN 8 + +void michael_mic(u8 *key, u8 *da, u8 *sa, u8 priority, + u8 *data, size_t data_len, u8 *mic); + +#endif /* MICHAEL_H */ diff --git a/net/mac80211/rc80211_simple.c b/net/mac80211/rc80211_simple.c new file mode 100644 index 00000000000..68bddaeee00 --- /dev/null +++ b/net/mac80211/rc80211_simple.c @@ -0,0 +1,361 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/compiler.h> + +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "ieee80211_rate.h" + + +/* This is a minimal implementation of TX rate controlling that can be used + * as the default when no improved mechanisms are available. */ + + +#define RATE_CONTROL_EMERG_DEC 2 +#define RATE_CONTROL_INTERVAL (HZ / 20) +#define RATE_CONTROL_MIN_TX 10 + +MODULE_ALIAS("rc80211_default"); + +static void rate_control_rate_inc(struct ieee80211_local *local, + struct sta_info *sta) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_hw_mode *mode; + int i = sta->txrate; + int maxrate; + + sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); + if (sdata->bss && sdata->bss->force_unicast_rateidx > -1) { + /* forced unicast rate - do not change STA rate */ + return; + } + + mode = local->oper_hw_mode; + maxrate = sdata->bss ? sdata->bss->max_ratectrl_rateidx : -1; + + if (i > mode->num_rates) + i = mode->num_rates - 2; + + while (i + 1 < mode->num_rates) { + i++; + if (sta->supp_rates & BIT(i) && + mode->rates[i].flags & IEEE80211_RATE_SUPPORTED && + (maxrate < 0 || i <= maxrate)) { + sta->txrate = i; + break; + } + } +} + + +static void rate_control_rate_dec(struct ieee80211_local *local, + struct sta_info *sta) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_hw_mode *mode; + int i = sta->txrate; + + sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); + if (sdata->bss && sdata->bss->force_unicast_rateidx > -1) { + /* forced unicast rate - do not change STA rate */ + return; + } + + mode = local->oper_hw_mode; + if (i > mode->num_rates) + i = mode->num_rates; + + while (i > 0) { + i--; + if (sta->supp_rates & BIT(i) && + mode->rates[i].flags & IEEE80211_RATE_SUPPORTED) { + sta->txrate = i; + break; + } + } +} + + +static struct ieee80211_rate * +rate_control_lowest_rate(struct ieee80211_local *local, + struct ieee80211_hw_mode *mode) +{ + int i; + + for (i = 0; i < mode->num_rates; i++) { + struct ieee80211_rate *rate = &mode->rates[i]; + + if (rate->flags & IEEE80211_RATE_SUPPORTED) + return rate; + } + + printk(KERN_DEBUG "rate_control_lowest_rate - no supported rates " + "found\n"); + return &mode->rates[0]; +} + + +struct global_rate_control { + int dummy; +}; + +struct sta_rate_control { + unsigned long last_rate_change; + u32 tx_num_failures; + u32 tx_num_xmit; + + unsigned long avg_rate_update; + u32 tx_avg_rate_sum; + u32 tx_avg_rate_num; +}; + + +static void rate_control_simple_tx_status(void *priv, struct net_device *dev, + struct sk_buff *skb, + struct ieee80211_tx_status *status) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct sta_info *sta; + struct sta_rate_control *srctrl; + + sta = sta_info_get(local, hdr->addr1); + + if (!sta) + return; + + srctrl = sta->rate_ctrl_priv; + srctrl->tx_num_xmit++; + if (status->excessive_retries) { + sta->antenna_sel_tx = sta->antenna_sel_tx == 1 ? 2 : 1; + sta->antenna_sel_rx = sta->antenna_sel_rx == 1 ? 2 : 1; + if (local->sta_antenna_sel == STA_ANTENNA_SEL_SW_CTRL_DEBUG) { + printk(KERN_DEBUG "%s: " MAC_FMT " TX antenna --> %d " + "RX antenna --> %d (@%lu)\n", + dev->name, MAC_ARG(hdr->addr1), + sta->antenna_sel_tx, sta->antenna_sel_rx, jiffies); + } + srctrl->tx_num_failures++; + sta->tx_retry_failed++; + sta->tx_num_consecutive_failures++; + sta->tx_num_mpdu_fail++; + } else { + sta->last_ack_rssi[0] = sta->last_ack_rssi[1]; + sta->last_ack_rssi[1] = sta->last_ack_rssi[2]; + sta->last_ack_rssi[2] = status->ack_signal; + sta->tx_num_consecutive_failures = 0; + sta->tx_num_mpdu_ok++; + } + sta->tx_retry_count += status->retry_count; + sta->tx_num_mpdu_fail += status->retry_count; + + if (time_after(jiffies, + srctrl->last_rate_change + RATE_CONTROL_INTERVAL) && + srctrl->tx_num_xmit > RATE_CONTROL_MIN_TX) { + u32 per_failed; + srctrl->last_rate_change = jiffies; + + per_failed = (100 * sta->tx_num_mpdu_fail) / + (sta->tx_num_mpdu_fail + sta->tx_num_mpdu_ok); + /* TODO: calculate average per_failed to make adjusting + * parameters easier */ +#if 0 + if (net_ratelimit()) { + printk(KERN_DEBUG "MPDU fail=%d ok=%d per_failed=%d\n", + sta->tx_num_mpdu_fail, sta->tx_num_mpdu_ok, + per_failed); + } +#endif + + if (per_failed > local->rate_ctrl_num_down) { + rate_control_rate_dec(local, sta); + } else if (per_failed < local->rate_ctrl_num_up) { + rate_control_rate_inc(local, sta); + } + srctrl->tx_avg_rate_sum += status->control.rate->rate; + srctrl->tx_avg_rate_num++; + srctrl->tx_num_failures = 0; + srctrl->tx_num_xmit = 0; + } else if (sta->tx_num_consecutive_failures >= + RATE_CONTROL_EMERG_DEC) { + rate_control_rate_dec(local, sta); + } + + if (srctrl->avg_rate_update + 60 * HZ < jiffies) { + srctrl->avg_rate_update = jiffies; + if (srctrl->tx_avg_rate_num > 0) { +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: STA " MAC_FMT " Average rate: " + "%d (%d/%d)\n", + dev->name, MAC_ARG(sta->addr), + srctrl->tx_avg_rate_sum / + srctrl->tx_avg_rate_num, + srctrl->tx_avg_rate_sum, + srctrl->tx_avg_rate_num); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + srctrl->tx_avg_rate_sum = 0; + srctrl->tx_avg_rate_num = 0; + } + } + + sta_info_put(sta); +} + + +static struct ieee80211_rate * +rate_control_simple_get_rate(void *priv, struct net_device *dev, + struct sk_buff *skb, + struct rate_control_extra *extra) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_sub_if_data *sdata; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct ieee80211_hw_mode *mode = extra->mode; + struct sta_info *sta; + int rateidx, nonerp_idx; + u16 fc; + + memset(extra, 0, sizeof(*extra)); + + fc = le16_to_cpu(hdr->frame_control); + if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA || + (hdr->addr1[0] & 0x01)) { + /* Send management frames and broadcast/multicast data using + * lowest rate. */ + /* TODO: this could probably be improved.. */ + return rate_control_lowest_rate(local, mode); + } + + sta = sta_info_get(local, hdr->addr1); + + if (!sta) + return rate_control_lowest_rate(local, mode); + + sdata = IEEE80211_DEV_TO_SUB_IF(dev); + if (sdata->bss && sdata->bss->force_unicast_rateidx > -1) + sta->txrate = sdata->bss->force_unicast_rateidx; + + rateidx = sta->txrate; + + if (rateidx >= mode->num_rates) + rateidx = mode->num_rates - 1; + + sta->last_txrate = rateidx; + nonerp_idx = rateidx; + while (nonerp_idx > 0 && + ((mode->rates[nonerp_idx].flags & IEEE80211_RATE_ERP) || + !(mode->rates[nonerp_idx].flags & IEEE80211_RATE_SUPPORTED) || + !(sta->supp_rates & BIT(nonerp_idx)))) + nonerp_idx--; + extra->nonerp = &mode->rates[nonerp_idx]; + + sta_info_put(sta); + + return &mode->rates[rateidx]; +} + + +static void rate_control_simple_rate_init(void *priv, void *priv_sta, + struct ieee80211_local *local, + struct sta_info *sta) +{ + struct ieee80211_hw_mode *mode; + int i; + sta->txrate = 0; + mode = local->oper_hw_mode; + /* TODO: what is a good starting rate for STA? About middle? Maybe not + * the lowest or the highest rate.. Could consider using RSSI from + * previous packets? Need to have IEEE 802.1X auth succeed immediately + * after assoc.. */ + for (i = 0; i < mode->num_rates; i++) { + if ((sta->supp_rates & BIT(i)) && + (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) + sta->txrate = i; + } +} + + +static void * rate_control_simple_alloc(struct ieee80211_local *local) +{ + struct global_rate_control *rctrl; + + rctrl = kzalloc(sizeof(*rctrl), GFP_ATOMIC); + + return rctrl; +} + + +static void rate_control_simple_free(void *priv) +{ + struct global_rate_control *rctrl = priv; + kfree(rctrl); +} + + +static void rate_control_simple_clear(void *priv) +{ +} + + +static void * rate_control_simple_alloc_sta(void *priv, gfp_t gfp) +{ + struct sta_rate_control *rctrl; + + rctrl = kzalloc(sizeof(*rctrl), gfp); + + return rctrl; +} + + +static void rate_control_simple_free_sta(void *priv, void *priv_sta) +{ + struct sta_rate_control *rctrl = priv_sta; + kfree(rctrl); +} + + +static struct rate_control_ops rate_control_simple = { + .module = THIS_MODULE, + .name = "simple", + .tx_status = rate_control_simple_tx_status, + .get_rate = rate_control_simple_get_rate, + .rate_init = rate_control_simple_rate_init, + .clear = rate_control_simple_clear, + .alloc = rate_control_simple_alloc, + .free = rate_control_simple_free, + .alloc_sta = rate_control_simple_alloc_sta, + .free_sta = rate_control_simple_free_sta, +}; + + +static int __init rate_control_simple_init(void) +{ + return ieee80211_rate_control_register(&rate_control_simple); +} + + +static void __exit rate_control_simple_exit(void) +{ + ieee80211_rate_control_unregister(&rate_control_simple); +} + + +module_init(rate_control_simple_init); +module_exit(rate_control_simple_exit); + +MODULE_DESCRIPTION("Simple rate control algorithm for ieee80211"); +MODULE_LICENSE("GPL"); diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c new file mode 100644 index 00000000000..cddaf578dc8 --- /dev/null +++ b/net/mac80211/sta_info.c @@ -0,0 +1,386 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/if_arp.h> + +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "ieee80211_rate.h" +#include "sta_info.h" + +/* Caller must hold local->sta_lock */ +static void sta_info_hash_add(struct ieee80211_local *local, + struct sta_info *sta) +{ + sta->hnext = local->sta_hash[STA_HASH(sta->addr)]; + local->sta_hash[STA_HASH(sta->addr)] = sta; +} + + +/* Caller must hold local->sta_lock */ +static void sta_info_hash_del(struct ieee80211_local *local, + struct sta_info *sta) +{ + struct sta_info *s; + + s = local->sta_hash[STA_HASH(sta->addr)]; + if (!s) + return; + if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) { + local->sta_hash[STA_HASH(sta->addr)] = s->hnext; + return; + } + + while (s->hnext && memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0) + s = s->hnext; + if (s->hnext) + s->hnext = s->hnext->hnext; + else + printk(KERN_ERR "%s: could not remove STA " MAC_FMT " from " + "hash table\n", local->mdev->name, MAC_ARG(sta->addr)); +} + +static inline void __sta_info_get(struct sta_info *sta) +{ + kref_get(&sta->kref); +} + +struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr) +{ + struct sta_info *sta; + + spin_lock_bh(&local->sta_lock); + sta = local->sta_hash[STA_HASH(addr)]; + while (sta) { + if (memcmp(sta->addr, addr, ETH_ALEN) == 0) { + __sta_info_get(sta); + break; + } + sta = sta->hnext; + } + spin_unlock_bh(&local->sta_lock); + + return sta; +} +EXPORT_SYMBOL(sta_info_get); + +int sta_info_min_txrate_get(struct ieee80211_local *local) +{ + struct sta_info *sta; + struct ieee80211_hw_mode *mode; + int min_txrate = 9999999; + int i; + + spin_lock_bh(&local->sta_lock); + mode = local->oper_hw_mode; + for (i = 0; i < STA_HASH_SIZE; i++) { + sta = local->sta_hash[i]; + while (sta) { + if (sta->txrate < min_txrate) + min_txrate = sta->txrate; + sta = sta->hnext; + } + } + spin_unlock_bh(&local->sta_lock); + if (min_txrate == 9999999) + min_txrate = 0; + + return mode->rates[min_txrate].rate; +} + + +static void sta_info_release(struct kref *kref) +{ + struct sta_info *sta = container_of(kref, struct sta_info, kref); + struct ieee80211_local *local = sta->local; + struct sk_buff *skb; + + /* free sta structure; it has already been removed from + * hash table etc. external structures. Make sure that all + * buffered frames are release (one might have been added + * after sta_info_free() was called). */ + while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { + local->total_ps_buffered--; + dev_kfree_skb_any(skb); + } + while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { + dev_kfree_skb_any(skb); + } + rate_control_free_sta(sta->rate_ctrl, sta->rate_ctrl_priv); + rate_control_put(sta->rate_ctrl); + kfree(sta); +} + + +void sta_info_put(struct sta_info *sta) +{ + kref_put(&sta->kref, sta_info_release); +} +EXPORT_SYMBOL(sta_info_put); + + +struct sta_info * sta_info_add(struct ieee80211_local *local, + struct net_device *dev, u8 *addr, gfp_t gfp) +{ + struct sta_info *sta; + + sta = kzalloc(sizeof(*sta), gfp); + if (!sta) + return NULL; + + kref_init(&sta->kref); + + sta->rate_ctrl = rate_control_get(local->rate_ctrl); + sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, gfp); + if (!sta->rate_ctrl_priv) { + rate_control_put(sta->rate_ctrl); + kref_put(&sta->kref, sta_info_release); + kfree(sta); + return NULL; + } + + memcpy(sta->addr, addr, ETH_ALEN); + sta->local = local; + sta->dev = dev; + skb_queue_head_init(&sta->ps_tx_buf); + skb_queue_head_init(&sta->tx_filtered); + __sta_info_get(sta); /* sta used by caller, decremented by + * sta_info_put() */ + spin_lock_bh(&local->sta_lock); + list_add(&sta->list, &local->sta_list); + local->num_sta++; + sta_info_hash_add(local, sta); + spin_unlock_bh(&local->sta_lock); + if (local->ops->sta_table_notification) + local->ops->sta_table_notification(local_to_hw(local), + local->num_sta); + sta->key_idx_compression = HW_KEY_IDX_INVALID; + +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: Added STA " MAC_FMT "\n", + local->mdev->name, MAC_ARG(addr)); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + + return sta; +} + +static void sta_info_remove(struct sta_info *sta) +{ + struct ieee80211_local *local = sta->local; + struct ieee80211_sub_if_data *sdata; + + sta_info_hash_del(local, sta); + list_del(&sta->list); + sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); + if (sta->flags & WLAN_STA_PS) { + sta->flags &= ~WLAN_STA_PS; + if (sdata->bss) + atomic_dec(&sdata->bss->num_sta_ps); + } + local->num_sta--; + sta_info_remove_aid_ptr(sta); +} + +void sta_info_free(struct sta_info *sta, int locked) +{ + struct sk_buff *skb; + struct ieee80211_local *local = sta->local; + + if (!locked) { + spin_lock_bh(&local->sta_lock); + sta_info_remove(sta); + spin_unlock_bh(&local->sta_lock); + } else { + sta_info_remove(sta); + } + if (local->ops->sta_table_notification) + local->ops->sta_table_notification(local_to_hw(local), + local->num_sta); + + while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { + local->total_ps_buffered--; + dev_kfree_skb_any(skb); + } + while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { + dev_kfree_skb_any(skb); + } + + if (sta->key) { + if (local->ops->set_key) { + struct ieee80211_key_conf *key; + key = ieee80211_key_data2conf(local, sta->key); + if (key) { + local->ops->set_key(local_to_hw(local), + DISABLE_KEY, + sta->addr, key, sta->aid); + kfree(key); + } + } + } else if (sta->key_idx_compression != HW_KEY_IDX_INVALID) { + struct ieee80211_key_conf conf; + memset(&conf, 0, sizeof(conf)); + conf.hw_key_idx = sta->key_idx_compression; + conf.alg = ALG_NULL; + conf.flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT; + local->ops->set_key(local_to_hw(local), DISABLE_KEY, + sta->addr, &conf, sta->aid); + sta->key_idx_compression = HW_KEY_IDX_INVALID; + } + +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n", + local->mdev->name, MAC_ARG(sta->addr)); +#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ + + if (sta->key) { + ieee80211_key_free(sta->key); + sta->key = NULL; + } + + sta_info_put(sta); +} + + +static inline int sta_info_buffer_expired(struct ieee80211_local *local, + struct sta_info *sta, + struct sk_buff *skb) +{ + struct ieee80211_tx_packet_data *pkt_data; + int timeout; + + if (!skb) + return 0; + + pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; + + /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ + timeout = (sta->listen_interval * local->hw.conf.beacon_int * 32 / + 15625) * HZ; + if (timeout < STA_TX_BUFFER_EXPIRE) + timeout = STA_TX_BUFFER_EXPIRE; + return time_after(jiffies, pkt_data->jiffies + timeout); +} + + +static void sta_info_cleanup_expire_buffered(struct ieee80211_local *local, + struct sta_info *sta) +{ + unsigned long flags; + struct sk_buff *skb; + + if (skb_queue_empty(&sta->ps_tx_buf)) + return; + + for (;;) { + spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); + skb = skb_peek(&sta->ps_tx_buf); + if (sta_info_buffer_expired(local, sta, skb)) { + skb = __skb_dequeue(&sta->ps_tx_buf); + if (skb_queue_empty(&sta->ps_tx_buf)) + sta->flags &= ~WLAN_STA_TIM; + } else + skb = NULL; + spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); + + if (skb) { + local->total_ps_buffered--; + printk(KERN_DEBUG "Buffered frame expired (STA " + MAC_FMT ")\n", MAC_ARG(sta->addr)); + dev_kfree_skb(skb); + } else + break; + } +} + + +static void sta_info_cleanup(unsigned long data) +{ + struct ieee80211_local *local = (struct ieee80211_local *) data; + struct sta_info *sta; + + spin_lock_bh(&local->sta_lock); + list_for_each_entry(sta, &local->sta_list, list) { + __sta_info_get(sta); + sta_info_cleanup_expire_buffered(local, sta); + sta_info_put(sta); + } + spin_unlock_bh(&local->sta_lock); + + local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL; + add_timer(&local->sta_cleanup); +} + +void sta_info_init(struct ieee80211_local *local) +{ + spin_lock_init(&local->sta_lock); + INIT_LIST_HEAD(&local->sta_list); + INIT_LIST_HEAD(&local->deleted_sta_list); + + init_timer(&local->sta_cleanup); + local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL; + local->sta_cleanup.data = (unsigned long) local; + local->sta_cleanup.function = sta_info_cleanup; +} + +int sta_info_start(struct ieee80211_local *local) +{ + add_timer(&local->sta_cleanup); + return 0; +} + +void sta_info_stop(struct ieee80211_local *local) +{ + struct sta_info *sta, *tmp; + + del_timer(&local->sta_cleanup); + + list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { + /* We don't need locking at this point. */ + sta_info_free(sta, 0); + } +} + +void sta_info_remove_aid_ptr(struct sta_info *sta) +{ + struct ieee80211_sub_if_data *sdata; + + if (sta->aid <= 0) + return; + + sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); + + if (sdata->local->ops->set_tim) + sdata->local->ops->set_tim(local_to_hw(sdata->local), + sta->aid, 0); + if (sdata->bss) + __bss_tim_clear(sdata->bss, sta->aid); +} + + +/** + * sta_info_flush - flush matching STA entries from the STA table + * @local: local interface data + * @dev: matching rule for the net device (sta->dev) or %NULL to match all STAs + */ +void sta_info_flush(struct ieee80211_local *local, struct net_device *dev) +{ + struct sta_info *sta, *tmp; + + spin_lock_bh(&local->sta_lock); + list_for_each_entry_safe(sta, tmp, &local->sta_list, list) + if (!dev || dev == sta->dev) + sta_info_free(sta, 1); + spin_unlock_bh(&local->sta_lock); +} diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h new file mode 100644 index 00000000000..f26e1c29439 --- /dev/null +++ b/net/mac80211/sta_info.h @@ -0,0 +1,145 @@ +/* + * Copyright 2002-2005, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef STA_INFO_H +#define STA_INFO_H + +#include <linux/list.h> +#include <linux/types.h> +#include <linux/if_ether.h> +#include <linux/kref.h> +#include "ieee80211_key.h" + +/* Stations flags (struct sta_info::flags) */ +#define WLAN_STA_AUTH BIT(0) +#define WLAN_STA_ASSOC BIT(1) +#define WLAN_STA_PS BIT(2) +#define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */ +#define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */ +#define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is + * controlling whether STA is authorized to + * send and receive non-IEEE 802.1X frames + */ +#define WLAN_STA_SHORT_PREAMBLE BIT(7) +#define WLAN_STA_WME BIT(9) +#define WLAN_STA_WDS BIT(27) + + +struct sta_info { + struct kref kref; + struct list_head list; + struct sta_info *hnext; /* next entry in hash table list */ + + struct ieee80211_local *local; + + u8 addr[ETH_ALEN]; + u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */ + u32 flags; /* WLAN_STA_ */ + + struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in + * power saving state */ + int pspoll; /* whether STA has send a PS Poll frame */ + struct sk_buff_head tx_filtered; /* buffer of TX frames that were + * already given to low-level driver, + * but were filtered */ + int clear_dst_mask; + + unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */ + unsigned long rx_bytes, tx_bytes; + unsigned long tx_retry_failed, tx_retry_count; + unsigned long tx_filtered_count; + + unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */ + + unsigned long last_rx; + u32 supp_rates; /* bitmap of supported rates in local->curr_rates */ + int txrate; /* index in local->curr_rates */ + int last_txrate; /* last rate used to send a frame to this STA */ + int last_nonerp_idx; + + struct net_device *dev; /* which net device is this station associated + * to */ + + struct ieee80211_key *key; + + u32 tx_num_consecutive_failures; + u32 tx_num_mpdu_ok; + u32 tx_num_mpdu_fail; + + struct rate_control_ref *rate_ctrl; + void *rate_ctrl_priv; + + /* last received seq/frag number from this STA (per RX queue) */ + __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES]; + unsigned long num_duplicates; /* number of duplicate frames received + * from this STA */ + unsigned long tx_fragments; /* number of transmitted MPDUs */ + unsigned long rx_fragments; /* number of received MPDUs */ + unsigned long rx_dropped; /* number of dropped MPDUs from this STA */ + + int last_rssi; /* RSSI of last received frame from this STA */ + int last_signal; /* signal of last received frame from this STA */ + int last_noise; /* noise of last received frame from this STA */ + int last_ack_rssi[3]; /* RSSI of last received ACKs from this STA */ + unsigned long last_ack; + int channel_use; + int channel_use_raw; + + u8 antenna_sel_tx; + u8 antenna_sel_rx; + + + int key_idx_compression; /* key table index for compression and TX + * filtering; used only if sta->key is not + * set */ + + int assoc_ap; /* whether this is an AP that we are + * associated with as a client */ + +#ifdef CONFIG_MAC80211_DEBUG_COUNTERS + unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES]; + unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES]; +#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */ + + int vlan_id; + + u16 listen_interval; +}; + + +/* Maximum number of concurrently registered stations */ +#define MAX_STA_COUNT 2007 + +#define STA_HASH_SIZE 256 +#define STA_HASH(sta) (sta[5]) + + +/* Maximum number of frames to buffer per power saving station */ +#define STA_MAX_TX_BUFFER 128 + +/* Minimum buffered frame expiry time. If STA uses listen interval that is + * smaller than this value, the minimum value here is used instead. */ +#define STA_TX_BUFFER_EXPIRE (10 * HZ) + +/* How often station data is cleaned up (e.g., expiration of buffered frames) + */ +#define STA_INFO_CLEANUP_INTERVAL (10 * HZ) + +struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr); +int sta_info_min_txrate_get(struct ieee80211_local *local); +void sta_info_put(struct sta_info *sta); +struct sta_info * sta_info_add(struct ieee80211_local *local, + struct net_device *dev, u8 *addr, gfp_t gfp); +void sta_info_free(struct sta_info *sta, int locked); +void sta_info_init(struct ieee80211_local *local); +int sta_info_start(struct ieee80211_local *local); +void sta_info_stop(struct ieee80211_local *local); +void sta_info_remove_aid_ptr(struct sta_info *sta); +void sta_info_flush(struct ieee80211_local *local, struct net_device *dev); + +#endif /* STA_INFO_H */ diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c new file mode 100644 index 00000000000..41621720e56 --- /dev/null +++ b/net/mac80211/tkip.c @@ -0,0 +1,341 @@ +/* + * Copyright 2002-2004, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/netdevice.h> + +#include <net/mac80211.h> +#include "ieee80211_key.h" +#include "tkip.h" +#include "wep.h" + + +/* TKIP key mixing functions */ + + +#define PHASE1_LOOP_COUNT 8 + + +/* 2-byte by 2-byte subset of the full AES S-box table; second part of this + * table is identical to first part but byte-swapped */ +static const u16 tkip_sbox[256] = +{ + 0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154, + 0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A, + 0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B, + 0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B, + 0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F, + 0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F, + 0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5, + 0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F, + 0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB, + 0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397, + 0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED, + 0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A, + 0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194, + 0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3, + 0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104, + 0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D, + 0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39, + 0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695, + 0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83, + 0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76, + 0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4, + 0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B, + 0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0, + 0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018, + 0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751, + 0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85, + 0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12, + 0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9, + 0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7, + 0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A, + 0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8, + 0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A, +}; + + +static inline u16 Mk16(u8 x, u8 y) +{ + return ((u16) x << 8) | (u16) y; +} + + +static inline u8 Hi8(u16 v) +{ + return v >> 8; +} + + +static inline u8 Lo8(u16 v) +{ + return v & 0xff; +} + + +static inline u16 Hi16(u32 v) +{ + return v >> 16; +} + + +static inline u16 Lo16(u32 v) +{ + return v & 0xffff; +} + + +static inline u16 RotR1(u16 v) +{ + return (v >> 1) | ((v & 0x0001) << 15); +} + + +static inline u16 tkip_S(u16 val) +{ + u16 a = tkip_sbox[Hi8(val)]; + + return tkip_sbox[Lo8(val)] ^ Hi8(a) ^ (Lo8(a) << 8); +} + + + +/* P1K := Phase1(TA, TK, TSC) + * TA = transmitter address (48 bits) + * TK = dot11DefaultKeyValue or dot11KeyMappingValue (128 bits) + * TSC = TKIP sequence counter (48 bits, only 32 msb bits used) + * P1K: 80 bits + */ +static void tkip_mixing_phase1(const u8 *ta, const u8 *tk, u32 tsc_IV32, + u16 *p1k) +{ + int i, j; + + p1k[0] = Lo16(tsc_IV32); + p1k[1] = Hi16(tsc_IV32); + p1k[2] = Mk16(ta[1], ta[0]); + p1k[3] = Mk16(ta[3], ta[2]); + p1k[4] = Mk16(ta[5], ta[4]); + + for (i = 0; i < PHASE1_LOOP_COUNT; i++) { + j = 2 * (i & 1); + p1k[0] += tkip_S(p1k[4] ^ Mk16(tk[ 1 + j], tk[ 0 + j])); + p1k[1] += tkip_S(p1k[0] ^ Mk16(tk[ 5 + j], tk[ 4 + j])); + p1k[2] += tkip_S(p1k[1] ^ Mk16(tk[ 9 + j], tk[ 8 + j])); + p1k[3] += tkip_S(p1k[2] ^ Mk16(tk[13 + j], tk[12 + j])); + p1k[4] += tkip_S(p1k[3] ^ Mk16(tk[ 1 + j], tk[ 0 + j])) + i; + } +} + + +static void tkip_mixing_phase2(const u16 *p1k, const u8 *tk, u16 tsc_IV16, + u8 *rc4key) +{ + u16 ppk[6]; + int i; + + ppk[0] = p1k[0]; + ppk[1] = p1k[1]; + ppk[2] = p1k[2]; + ppk[3] = p1k[3]; + ppk[4] = p1k[4]; + ppk[5] = p1k[4] + tsc_IV16; + + ppk[0] += tkip_S(ppk[5] ^ Mk16(tk[ 1], tk[ 0])); + ppk[1] += tkip_S(ppk[0] ^ Mk16(tk[ 3], tk[ 2])); + ppk[2] += tkip_S(ppk[1] ^ Mk16(tk[ 5], tk[ 4])); + ppk[3] += tkip_S(ppk[2] ^ Mk16(tk[ 7], tk[ 6])); + ppk[4] += tkip_S(ppk[3] ^ Mk16(tk[ 9], tk[ 8])); + ppk[5] += tkip_S(ppk[4] ^ Mk16(tk[11], tk[10])); + ppk[0] += RotR1(ppk[5] ^ Mk16(tk[13], tk[12])); + ppk[1] += RotR1(ppk[0] ^ Mk16(tk[15], tk[14])); + ppk[2] += RotR1(ppk[1]); + ppk[3] += RotR1(ppk[2]); + ppk[4] += RotR1(ppk[3]); + ppk[5] += RotR1(ppk[4]); + + rc4key[0] = Hi8(tsc_IV16); + rc4key[1] = (Hi8(tsc_IV16) | 0x20) & 0x7f; + rc4key[2] = Lo8(tsc_IV16); + rc4key[3] = Lo8((ppk[5] ^ Mk16(tk[1], tk[0])) >> 1); + + for (i = 0; i < 6; i++) { + rc4key[4 + 2 * i] = Lo8(ppk[i]); + rc4key[5 + 2 * i] = Hi8(ppk[i]); + } +} + + +/* Add TKIP IV and Ext. IV at @pos. @iv0, @iv1, and @iv2 are the first octets + * of the IV. Returns pointer to the octet following IVs (i.e., beginning of + * the packet payload). */ +u8 * ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key, + u8 iv0, u8 iv1, u8 iv2) +{ + *pos++ = iv0; + *pos++ = iv1; + *pos++ = iv2; + *pos++ = (key->keyidx << 6) | (1 << 5) /* Ext IV */; + *pos++ = key->u.tkip.iv32 & 0xff; + *pos++ = (key->u.tkip.iv32 >> 8) & 0xff; + *pos++ = (key->u.tkip.iv32 >> 16) & 0xff; + *pos++ = (key->u.tkip.iv32 >> 24) & 0xff; + return pos; +} + + +void ieee80211_tkip_gen_phase1key(struct ieee80211_key *key, u8 *ta, + u16 *phase1key) +{ + tkip_mixing_phase1(ta, &key->key[ALG_TKIP_TEMP_ENCR_KEY], + key->u.tkip.iv32, phase1key); +} + +void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta, + u8 *rc4key) +{ + /* Calculate per-packet key */ + if (key->u.tkip.iv16 == 0 || !key->u.tkip.tx_initialized) { + /* IV16 wrapped around - perform TKIP phase 1 */ + tkip_mixing_phase1(ta, &key->key[ALG_TKIP_TEMP_ENCR_KEY], + key->u.tkip.iv32, key->u.tkip.p1k); + key->u.tkip.tx_initialized = 1; + } + + tkip_mixing_phase2(key->u.tkip.p1k, &key->key[ALG_TKIP_TEMP_ENCR_KEY], + key->u.tkip.iv16, rc4key); +} + +/* Encrypt packet payload with TKIP using @key. @pos is a pointer to the + * beginning of the buffer containing payload. This payload must include + * headroom of eight octets for IV and Ext. IV and taildroom of four octets + * for ICV. @payload_len is the length of payload (_not_ including extra + * headroom and tailroom). @ta is the transmitter addresses. */ +void ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm, + struct ieee80211_key *key, + u8 *pos, size_t payload_len, u8 *ta) +{ + u8 rc4key[16]; + + ieee80211_tkip_gen_rc4key(key, ta, rc4key); + pos = ieee80211_tkip_add_iv(pos, key, rc4key[0], rc4key[1], rc4key[2]); + ieee80211_wep_encrypt_data(tfm, rc4key, 16, pos, payload_len); +} + + +/* Decrypt packet payload with TKIP using @key. @pos is a pointer to the + * beginning of the buffer containing IEEE 802.11 header payload, i.e., + * including IV, Ext. IV, real data, Michael MIC, ICV. @payload_len is the + * length of payload, including IV, Ext. IV, MIC, ICV. */ +int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm, + struct ieee80211_key *key, + u8 *payload, size_t payload_len, u8 *ta, + int only_iv, int queue) +{ + u32 iv32; + u32 iv16; + u8 rc4key[16], keyid, *pos = payload; + int res; + + if (payload_len < 12) + return -1; + + iv16 = (pos[0] << 8) | pos[2]; + keyid = pos[3]; + iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24); + pos += 8; +#ifdef CONFIG_TKIP_DEBUG + { + int i; + printk(KERN_DEBUG "TKIP decrypt: data(len=%zd)", payload_len); + for (i = 0; i < payload_len; i++) + printk(" %02x", payload[i]); + printk("\n"); + printk(KERN_DEBUG "TKIP decrypt: iv16=%04x iv32=%08x\n", + iv16, iv32); + } +#endif /* CONFIG_TKIP_DEBUG */ + + if (!(keyid & (1 << 5))) + return TKIP_DECRYPT_NO_EXT_IV; + + if ((keyid >> 6) != key->keyidx) + return TKIP_DECRYPT_INVALID_KEYIDX; + + if (key->u.tkip.rx_initialized[queue] && + (iv32 < key->u.tkip.iv32_rx[queue] || + (iv32 == key->u.tkip.iv32_rx[queue] && + iv16 <= key->u.tkip.iv16_rx[queue]))) { +#ifdef CONFIG_TKIP_DEBUG + printk(KERN_DEBUG "TKIP replay detected for RX frame from " + MAC_FMT " (RX IV (%04x,%02x) <= prev. IV (%04x,%02x)\n", + MAC_ARG(ta), + iv32, iv16, key->u.tkip.iv32_rx[queue], + key->u.tkip.iv16_rx[queue]); +#endif /* CONFIG_TKIP_DEBUG */ + return TKIP_DECRYPT_REPLAY; + } + + if (only_iv) { + res = TKIP_DECRYPT_OK; + key->u.tkip.rx_initialized[queue] = 1; + goto done; + } + + if (!key->u.tkip.rx_initialized[queue] || + key->u.tkip.iv32_rx[queue] != iv32) { + key->u.tkip.rx_initialized[queue] = 1; + /* IV16 wrapped around - perform TKIP phase 1 */ + tkip_mixing_phase1(ta, &key->key[ALG_TKIP_TEMP_ENCR_KEY], + iv32, key->u.tkip.p1k_rx[queue]); +#ifdef CONFIG_TKIP_DEBUG + { + int i; + printk(KERN_DEBUG "TKIP decrypt: Phase1 TA=" MAC_FMT + " TK=", MAC_ARG(ta)); + for (i = 0; i < 16; i++) + printk("%02x ", + key->key[ALG_TKIP_TEMP_ENCR_KEY + i]); + printk("\n"); + printk(KERN_DEBUG "TKIP decrypt: P1K="); + for (i = 0; i < 5; i++) + printk("%04x ", key->u.tkip.p1k_rx[queue][i]); + printk("\n"); + } +#endif /* CONFIG_TKIP_DEBUG */ + } + + tkip_mixing_phase2(key->u.tkip.p1k_rx[queue], + &key->key[ALG_TKIP_TEMP_ENCR_KEY], + iv16, rc4key); +#ifdef CONFIG_TKIP_DEBUG + { + int i; + printk(KERN_DEBUG "TKIP decrypt: Phase2 rc4key="); + for (i = 0; i < 16; i++) + printk("%02x ", rc4key[i]); + printk("\n"); + } +#endif /* CONFIG_TKIP_DEBUG */ + + res = ieee80211_wep_decrypt_data(tfm, rc4key, 16, pos, payload_len - 12); + done: + if (res == TKIP_DECRYPT_OK) { + /* FIX: these should be updated only after Michael MIC has been + * verified */ + /* Record previously received IV */ + key->u.tkip.iv32_rx[queue] = iv32; + key->u.tkip.iv16_rx[queue] = iv16; + } + + return res; +} + + diff --git a/net/mac80211/tkip.h b/net/mac80211/tkip.h new file mode 100644 index 00000000000..a0d181a1804 --- /dev/null +++ b/net/mac80211/tkip.h @@ -0,0 +1,36 @@ +/* + * Copyright 2002-2004, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef TKIP_H +#define TKIP_H + +#include <linux/types.h> +#include <linux/crypto.h> +#include "ieee80211_key.h" + +u8 * ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key, + u8 iv0, u8 iv1, u8 iv2); +void ieee80211_tkip_gen_phase1key(struct ieee80211_key *key, u8 *ta, + u16 *phase1key); +void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta, + u8 *rc4key); +void ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm, + struct ieee80211_key *key, + u8 *pos, size_t payload_len, u8 *ta); +enum { + TKIP_DECRYPT_OK = 0, + TKIP_DECRYPT_NO_EXT_IV = -1, + TKIP_DECRYPT_INVALID_KEYIDX = -2, + TKIP_DECRYPT_REPLAY = -3, +}; +int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm, + struct ieee80211_key *key, + u8 *payload, size_t payload_len, u8 *ta, + int only_iv, int queue); + +#endif /* TKIP_H */ diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c new file mode 100644 index 00000000000..1ad3d75281c --- /dev/null +++ b/net/mac80211/wep.c @@ -0,0 +1,328 @@ +/* + * Software WEP encryption implementation + * Copyright 2002, Jouni Malinen <jkmaline@cc.hut.fi> + * Copyright 2003, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/random.h> +#include <linux/compiler.h> +#include <linux/crc32.h> +#include <linux/crypto.h> +#include <linux/err.h> +#include <linux/mm.h> +#include <asm/scatterlist.h> + +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "wep.h" + + +int ieee80211_wep_init(struct ieee80211_local *local) +{ + /* start WEP IV from a random value */ + get_random_bytes(&local->wep_iv, WEP_IV_LEN); + + local->wep_tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, + CRYPTO_ALG_ASYNC); + if (IS_ERR(local->wep_tx_tfm)) + return -ENOMEM; + + local->wep_rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, + CRYPTO_ALG_ASYNC); + if (IS_ERR(local->wep_rx_tfm)) { + crypto_free_blkcipher(local->wep_tx_tfm); + return -ENOMEM; + } + + return 0; +} + +void ieee80211_wep_free(struct ieee80211_local *local) +{ + crypto_free_blkcipher(local->wep_tx_tfm); + crypto_free_blkcipher(local->wep_rx_tfm); +} + +static inline int ieee80211_wep_weak_iv(u32 iv, int keylen) +{ + /* Fluhrer, Mantin, and Shamir have reported weaknesses in the + * key scheduling algorithm of RC4. At least IVs (KeyByte + 3, + * 0xff, N) can be used to speedup attacks, so avoid using them. */ + if ((iv & 0xff00) == 0xff00) { + u8 B = (iv >> 16) & 0xff; + if (B >= 3 && B < 3 + keylen) + return 1; + } + return 0; +} + + +void ieee80211_wep_get_iv(struct ieee80211_local *local, + struct ieee80211_key *key, u8 *iv) +{ + local->wep_iv++; + if (ieee80211_wep_weak_iv(local->wep_iv, key->keylen)) + local->wep_iv += 0x0100; + + if (!iv) + return; + + *iv++ = (local->wep_iv >> 16) & 0xff; + *iv++ = (local->wep_iv >> 8) & 0xff; + *iv++ = local->wep_iv & 0xff; + *iv++ = key->keyidx << 6; +} + + +u8 * ieee80211_wep_add_iv(struct ieee80211_local *local, + struct sk_buff *skb, + struct ieee80211_key *key) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc; + int hdrlen; + u8 *newhdr; + + fc = le16_to_cpu(hdr->frame_control); + fc |= IEEE80211_FCTL_PROTECTED; + hdr->frame_control = cpu_to_le16(fc); + + if ((skb_headroom(skb) < WEP_IV_LEN || + skb_tailroom(skb) < WEP_ICV_LEN)) { + I802_DEBUG_INC(local->tx_expand_skb_head); + if (unlikely(pskb_expand_head(skb, WEP_IV_LEN, WEP_ICV_LEN, + GFP_ATOMIC))) + return NULL; + } + + hdrlen = ieee80211_get_hdrlen(fc); + newhdr = skb_push(skb, WEP_IV_LEN); + memmove(newhdr, newhdr + WEP_IV_LEN, hdrlen); + ieee80211_wep_get_iv(local, key, newhdr + hdrlen); + return newhdr + hdrlen; +} + + +void ieee80211_wep_remove_iv(struct ieee80211_local *local, + struct sk_buff *skb, + struct ieee80211_key *key) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc; + int hdrlen; + + fc = le16_to_cpu(hdr->frame_control); + hdrlen = ieee80211_get_hdrlen(fc); + memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen); + skb_pull(skb, WEP_IV_LEN); +} + + +/* Perform WEP encryption using given key. data buffer must have tailroom + * for 4-byte ICV. data_len must not include this ICV. Note: this function + * does _not_ add IV. data = RC4(data | CRC32(data)) */ +void ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key, + size_t klen, u8 *data, size_t data_len) +{ + struct blkcipher_desc desc = { .tfm = tfm }; + struct scatterlist sg; + __le32 *icv; + + icv = (__le32 *)(data + data_len); + *icv = cpu_to_le32(~crc32_le(~0, data, data_len)); + + crypto_blkcipher_setkey(tfm, rc4key, klen); + sg.page = virt_to_page(data); + sg.offset = offset_in_page(data); + sg.length = data_len + WEP_ICV_LEN; + crypto_blkcipher_encrypt(&desc, &sg, &sg, sg.length); +} + + +/* Perform WEP encryption on given skb. 4 bytes of extra space (IV) in the + * beginning of the buffer 4 bytes of extra space (ICV) in the end of the + * buffer will be added. Both IV and ICV will be transmitted, so the + * payload length increases with 8 bytes. + * + * WEP frame payload: IV + TX key idx, RC4(data), ICV = RC4(CRC32(data)) + */ +int ieee80211_wep_encrypt(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_key *key) +{ + u32 klen; + u8 *rc4key, *iv; + size_t len; + + if (!key || key->alg != ALG_WEP) + return -1; + + klen = 3 + key->keylen; + rc4key = kmalloc(klen, GFP_ATOMIC); + if (!rc4key) + return -1; + + iv = ieee80211_wep_add_iv(local, skb, key); + if (!iv) { + kfree(rc4key); + return -1; + } + + len = skb->len - (iv + WEP_IV_LEN - skb->data); + + /* Prepend 24-bit IV to RC4 key */ + memcpy(rc4key, iv, 3); + + /* Copy rest of the WEP key (the secret part) */ + memcpy(rc4key + 3, key->key, key->keylen); + + /* Add room for ICV */ + skb_put(skb, WEP_ICV_LEN); + + ieee80211_wep_encrypt_data(local->wep_tx_tfm, rc4key, klen, + iv + WEP_IV_LEN, len); + + kfree(rc4key); + + return 0; +} + + +/* Perform WEP decryption using given key. data buffer includes encrypted + * payload, including 4-byte ICV, but _not_ IV. data_len must not include ICV. + * Return 0 on success and -1 on ICV mismatch. */ +int ieee80211_wep_decrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key, + size_t klen, u8 *data, size_t data_len) +{ + struct blkcipher_desc desc = { .tfm = tfm }; + struct scatterlist sg; + __le32 crc; + + crypto_blkcipher_setkey(tfm, rc4key, klen); + sg.page = virt_to_page(data); + sg.offset = offset_in_page(data); + sg.length = data_len + WEP_ICV_LEN; + crypto_blkcipher_decrypt(&desc, &sg, &sg, sg.length); + + crc = cpu_to_le32(~crc32_le(~0, data, data_len)); + if (memcmp(&crc, data + data_len, WEP_ICV_LEN) != 0) + /* ICV mismatch */ + return -1; + + return 0; +} + + +/* Perform WEP decryption on given skb. Buffer includes whole WEP part of + * the frame: IV (4 bytes), encrypted payload (including SNAP header), + * ICV (4 bytes). skb->len includes both IV and ICV. + * + * Returns 0 if frame was decrypted successfully and ICV was correct and -1 on + * failure. If frame is OK, IV and ICV will be removed, i.e., decrypted payload + * is moved to the beginning of the skb and skb length will be reduced. + */ +int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_key *key) +{ + u32 klen; + u8 *rc4key; + u8 keyidx; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc; + int hdrlen; + size_t len; + int ret = 0; + + fc = le16_to_cpu(hdr->frame_control); + if (!(fc & IEEE80211_FCTL_PROTECTED)) + return -1; + + hdrlen = ieee80211_get_hdrlen(fc); + + if (skb->len < 8 + hdrlen) + return -1; + + len = skb->len - hdrlen - 8; + + keyidx = skb->data[hdrlen + 3] >> 6; + + if (!key || keyidx != key->keyidx || key->alg != ALG_WEP) + return -1; + + klen = 3 + key->keylen; + + rc4key = kmalloc(klen, GFP_ATOMIC); + if (!rc4key) + return -1; + + /* Prepend 24-bit IV to RC4 key */ + memcpy(rc4key, skb->data + hdrlen, 3); + + /* Copy rest of the WEP key (the secret part) */ + memcpy(rc4key + 3, key->key, key->keylen); + + if (ieee80211_wep_decrypt_data(local->wep_rx_tfm, rc4key, klen, + skb->data + hdrlen + WEP_IV_LEN, + len)) { + printk(KERN_DEBUG "WEP decrypt failed (ICV)\n"); + ret = -1; + } + + kfree(rc4key); + + /* Trim ICV */ + skb_trim(skb, skb->len - WEP_ICV_LEN); + + /* Remove IV */ + memmove(skb->data + WEP_IV_LEN, skb->data, hdrlen); + skb_pull(skb, WEP_IV_LEN); + + return ret; +} + + +int ieee80211_wep_get_keyidx(struct sk_buff *skb) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc; + int hdrlen; + + fc = le16_to_cpu(hdr->frame_control); + if (!(fc & IEEE80211_FCTL_PROTECTED)) + return -1; + + hdrlen = ieee80211_get_hdrlen(fc); + + if (skb->len < 8 + hdrlen) + return -1; + + return skb->data[hdrlen + 3] >> 6; +} + + +u8 * ieee80211_wep_is_weak_iv(struct sk_buff *skb, struct ieee80211_key *key) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 fc; + int hdrlen; + u8 *ivpos; + u32 iv; + + fc = le16_to_cpu(hdr->frame_control); + if (!(fc & IEEE80211_FCTL_PROTECTED)) + return NULL; + + hdrlen = ieee80211_get_hdrlen(fc); + ivpos = skb->data + hdrlen; + iv = (ivpos[0] << 16) | (ivpos[1] << 8) | ivpos[2]; + + if (ieee80211_wep_weak_iv(iv, key->keylen)) + return ivpos; + + return NULL; +} diff --git a/net/mac80211/wep.h b/net/mac80211/wep.h new file mode 100644 index 00000000000..bfe29e8e10a --- /dev/null +++ b/net/mac80211/wep.h @@ -0,0 +1,40 @@ +/* + * Software WEP encryption implementation + * Copyright 2002, Jouni Malinen <jkmaline@cc.hut.fi> + * Copyright 2003, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef WEP_H +#define WEP_H + +#include <linux/skbuff.h> +#include <linux/types.h> +#include "ieee80211_i.h" +#include "ieee80211_key.h" + +int ieee80211_wep_init(struct ieee80211_local *local); +void ieee80211_wep_free(struct ieee80211_local *local); +void ieee80211_wep_get_iv(struct ieee80211_local *local, + struct ieee80211_key *key, u8 *iv); +u8 * ieee80211_wep_add_iv(struct ieee80211_local *local, + struct sk_buff *skb, + struct ieee80211_key *key); +void ieee80211_wep_remove_iv(struct ieee80211_local *local, + struct sk_buff *skb, + struct ieee80211_key *key); +void ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key, + size_t klen, u8 *data, size_t data_len); +int ieee80211_wep_decrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key, + size_t klen, u8 *data, size_t data_len); +int ieee80211_wep_encrypt(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_key *key); +int ieee80211_wep_decrypt(struct ieee80211_local *local, struct sk_buff *skb, + struct ieee80211_key *key); +int ieee80211_wep_get_keyidx(struct sk_buff *skb); +u8 * ieee80211_wep_is_weak_iv(struct sk_buff *skb, struct ieee80211_key *key); + +#endif /* WEP_H */ diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c new file mode 100644 index 00000000000..89ce8152969 --- /dev/null +++ b/net/mac80211/wme.c @@ -0,0 +1,678 @@ +/* + * Copyright 2004, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/module.h> +#include <linux/if_arp.h> +#include <linux/types.h> +#include <net/ip.h> +#include <net/pkt_sched.h> + +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "wme.h" + +static inline int WLAN_FC_IS_QOS_DATA(u16 fc) +{ + return (fc & 0x8C) == 0x88; +} + + +ieee80211_txrx_result +ieee80211_rx_h_parse_qos(struct ieee80211_txrx_data *rx) +{ + u8 *data = rx->skb->data; + int tid; + + /* does the frame have a qos control field? */ + if (WLAN_FC_IS_QOS_DATA(rx->fc)) { + u8 *qc = data + ieee80211_get_hdrlen(rx->fc) - QOS_CONTROL_LEN; + /* frame has qos control */ + tid = qc[0] & QOS_CONTROL_TID_MASK; + } else { + if (unlikely((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)) { + /* Separate TID for management frames */ + tid = NUM_RX_DATA_QUEUES - 1; + } else { + /* no qos control present */ + tid = 0; /* 802.1d - Best Effort */ + } + } +#ifdef CONFIG_MAC80211_DEBUG_COUNTERS + I802_DEBUG_INC(rx->local->wme_rx_queue[tid]); + if (rx->sta) { + I802_DEBUG_INC(rx->sta->wme_rx_queue[tid]); + } +#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */ + + rx->u.rx.queue = tid; + /* Set skb->priority to 1d tag if highest order bit of TID is not set. + * For now, set skb->priority to 0 for other cases. */ + rx->skb->priority = (tid > 7) ? 0 : tid; + + return TXRX_CONTINUE; +} + + +ieee80211_txrx_result +ieee80211_rx_h_remove_qos_control(struct ieee80211_txrx_data *rx) +{ + u16 fc = rx->fc; + u8 *data = rx->skb->data; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) data; + + if (!WLAN_FC_IS_QOS_DATA(fc)) + return TXRX_CONTINUE; + + /* remove the qos control field, update frame type and meta-data */ + memmove(data + 2, data, ieee80211_get_hdrlen(fc) - 2); + hdr = (struct ieee80211_hdr *) skb_pull(rx->skb, 2); + /* change frame type to non QOS */ + rx->fc = fc &= ~IEEE80211_STYPE_QOS_DATA; + hdr->frame_control = cpu_to_le16(fc); + + return TXRX_CONTINUE; +} + + +#ifdef CONFIG_NET_SCHED +/* maximum number of hardware queues we support. */ +#define TC_80211_MAX_QUEUES 8 + +struct ieee80211_sched_data +{ + struct tcf_proto *filter_list; + struct Qdisc *queues[TC_80211_MAX_QUEUES]; + struct sk_buff_head requeued[TC_80211_MAX_QUEUES]; +}; + + +/* given a data frame determine the 802.1p/1d tag to use */ +static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) +{ + struct iphdr *ip; + int dscp; + int offset; + + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct tcf_result res = { -1, 0 }; + + /* if there is a user set filter list, call out to that */ + if (q->filter_list) { + tc_classify(skb, q->filter_list, &res); + if (res.class != -1) + return res.class; + } + + /* skb->priority values from 256->263 are magic values to + * directly indicate a specific 802.1d priority. + * This is used to allow 802.1d priority to be passed directly in + * from VLAN tags, etc. */ + if (skb->priority >= 256 && skb->priority <= 263) + return skb->priority - 256; + + /* check there is a valid IP header present */ + offset = ieee80211_get_hdrlen_from_skb(skb) + 8 /* LLC + proto */; + if (skb->protocol != __constant_htons(ETH_P_IP) || + skb->len < offset + sizeof(*ip)) + return 0; + + ip = (struct iphdr *) (skb->data + offset); + + dscp = ip->tos & 0xfc; + if (dscp & 0x1c) + return 0; + return dscp >> 5; +} + + +static inline int wme_downgrade_ac(struct sk_buff *skb) +{ + switch (skb->priority) { + case 6: + case 7: + skb->priority = 5; /* VO -> VI */ + return 0; + case 4: + case 5: + skb->priority = 3; /* VI -> BE */ + return 0; + case 0: + case 3: + skb->priority = 2; /* BE -> BK */ + return 0; + default: + return -1; + } +} + + +/* positive return value indicates which queue to use + * negative return value indicates to drop the frame */ +static inline int classify80211(struct sk_buff *skb, struct Qdisc *qd) +{ + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_tx_packet_data *pkt_data = + (struct ieee80211_tx_packet_data *) skb->cb; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + unsigned short fc = le16_to_cpu(hdr->frame_control); + int qos; + const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 }; + + /* see if frame is data or non data frame */ + if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) { + /* management frames go on AC_VO queue, but are sent + * without QoS control fields */ + return IEEE80211_TX_QUEUE_DATA0; + } + + if (unlikely(pkt_data->mgmt_iface)) { + /* Data frames from hostapd (mainly, EAPOL) use AC_VO + * and they will include QoS control fields if + * the target STA is using WME. */ + skb->priority = 7; + return ieee802_1d_to_ac[skb->priority]; + } + + /* is this a QoS frame? */ + qos = fc & IEEE80211_STYPE_QOS_DATA; + + if (!qos) { + skb->priority = 0; /* required for correct WPA/11i MIC */ + return ieee802_1d_to_ac[skb->priority]; + } + + /* use the data classifier to determine what 802.1d tag the + * data frame has */ + skb->priority = classify_1d(skb, qd); + + /* incase we are a client verify acm is not set for this ac */ + while (unlikely(local->wmm_acm & BIT(skb->priority))) { + if (wme_downgrade_ac(skb)) { + /* No AC with lower priority has acm=0, + * drop packet. */ + return -1; + } + } + + /* look up which queue to use for frames with this 1d tag */ + return ieee802_1d_to_ac[skb->priority]; +} + + +static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd) +{ + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_tx_packet_data *pkt_data = + (struct ieee80211_tx_packet_data *) skb->cb; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + unsigned short fc = le16_to_cpu(hdr->frame_control); + struct Qdisc *qdisc; + int err, queue; + + if (pkt_data->requeue) { + skb_queue_tail(&q->requeued[pkt_data->queue], skb); + qd->q.qlen++; + return 0; + } + + queue = classify80211(skb, qd); + + /* now we know the 1d priority, fill in the QoS header if there is one + */ + if (WLAN_FC_IS_QOS_DATA(fc)) { + u8 *p = skb->data + ieee80211_get_hdrlen(fc) - 2; + u8 qos_hdr = skb->priority & QOS_CONTROL_TAG1D_MASK; + if (local->wifi_wme_noack_test) + qos_hdr |= QOS_CONTROL_ACK_POLICY_NOACK << + QOS_CONTROL_ACK_POLICY_SHIFT; + /* qos header is 2 bytes, second reserved */ + *p = qos_hdr; + p++; + *p = 0; + } + + if (unlikely(queue >= local->hw.queues)) { +#if 0 + if (net_ratelimit()) { + printk(KERN_DEBUG "%s - queue=%d (hw does not " + "support) -> %d\n", + __func__, queue, local->hw.queues - 1); + } +#endif + queue = local->hw.queues - 1; + } + + if (unlikely(queue < 0)) { + kfree_skb(skb); + err = NET_XMIT_DROP; + } else { + pkt_data->queue = (unsigned int) queue; + qdisc = q->queues[queue]; + err = qdisc->enqueue(skb, qdisc); + if (err == NET_XMIT_SUCCESS) { + qd->q.qlen++; + qd->bstats.bytes += skb->len; + qd->bstats.packets++; + return NET_XMIT_SUCCESS; + } + } + qd->qstats.drops++; + return err; +} + + +/* TODO: clean up the cases where master_hard_start_xmit + * returns non 0 - it shouldn't ever do that. Once done we + * can remove this function */ +static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_tx_packet_data *pkt_data = + (struct ieee80211_tx_packet_data *) skb->cb; + struct Qdisc *qdisc; + int err; + + /* we recorded which queue to use earlier! */ + qdisc = q->queues[pkt_data->queue]; + + if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) { + qd->q.qlen++; + return 0; + } + qd->qstats.drops++; + return err; +} + + +static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct net_device *dev = qd->dev; + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + struct sk_buff *skb; + struct Qdisc *qdisc; + int queue; + + /* check all the h/w queues in numeric/priority order */ + for (queue = 0; queue < hw->queues; queue++) { + /* see if there is room in this hardware queue */ + if (test_bit(IEEE80211_LINK_STATE_XOFF, + &local->state[queue]) || + test_bit(IEEE80211_LINK_STATE_PENDING, + &local->state[queue])) + continue; + + /* there is space - try and get a frame */ + skb = skb_dequeue(&q->requeued[queue]); + if (skb) { + qd->q.qlen--; + return skb; + } + + qdisc = q->queues[queue]; + skb = qdisc->dequeue(qdisc); + if (skb) { + qd->q.qlen--; + return skb; + } + } + /* returning a NULL here when all the h/w queues are full means we + * never need to call netif_stop_queue in the driver */ + return NULL; +} + + +static void wme_qdiscop_reset(struct Qdisc* qd) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + int queue; + + /* QUESTION: should we have some hardware flush functionality here? */ + + for (queue = 0; queue < hw->queues; queue++) { + skb_queue_purge(&q->requeued[queue]); + qdisc_reset(q->queues[queue]); + } + qd->q.qlen = 0; +} + + +static void wme_qdiscop_destroy(struct Qdisc* qd) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + int queue; + + tcf_destroy_chain(q->filter_list); + q->filter_list = NULL; + + for (queue=0; queue < hw->queues; queue++) { + skb_queue_purge(&q->requeued[queue]); + qdisc_destroy(q->queues[queue]); + q->queues[queue] = &noop_qdisc; + } +} + + +/* called whenever parameters are updated on existing qdisc */ +static int wme_qdiscop_tune(struct Qdisc *qd, struct rtattr *opt) +{ +/* struct ieee80211_sched_data *q = qdisc_priv(qd); +*/ + /* check our options block is the right size */ + /* copy any options to our local structure */ +/* Ignore options block for now - always use static mapping + struct tc_ieee80211_qopt *qopt = RTA_DATA(opt); + + if (opt->rta_len < RTA_LENGTH(sizeof(*qopt))) + return -EINVAL; + memcpy(q->tag2queue, qopt->tag2queue, sizeof(qopt->tag2queue)); +*/ + return 0; +} + + +/* called during initial creation of qdisc on device */ +static int wme_qdiscop_init(struct Qdisc *qd, struct rtattr *opt) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct net_device *dev = qd->dev; + struct ieee80211_local *local; + int queues; + int err = 0, i; + + /* check that device is a mac80211 device */ + if (!dev->ieee80211_ptr || + dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) + return -EINVAL; + + /* check this device is an ieee80211 master type device */ + if (dev->type != ARPHRD_IEEE80211) + return -EINVAL; + + /* check that there is no qdisc currently attached to device + * this ensures that we will be the root qdisc. (I can't find a better + * way to test this explicitly) */ + if (dev->qdisc_sleeping != &noop_qdisc) + return -EINVAL; + + if (qd->flags & TCQ_F_INGRESS) + return -EINVAL; + + local = wdev_priv(dev->ieee80211_ptr); + queues = local->hw.queues; + + /* if options were passed in, set them */ + if (opt) { + err = wme_qdiscop_tune(qd, opt); + } + + /* create child queues */ + for (i = 0; i < queues; i++) { + skb_queue_head_init(&q->requeued[i]); + q->queues[i] = qdisc_create_dflt(qd->dev, &pfifo_qdisc_ops, + qd->handle); + if (q->queues[i] == 0) { + q->queues[i] = &noop_qdisc; + printk(KERN_ERR "%s child qdisc %i creation failed", dev->name, i); + } + } + + return err; +} + +static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb) +{ +/* struct ieee80211_sched_data *q = qdisc_priv(qd); + unsigned char *p = skb->tail; + struct tc_ieee80211_qopt opt; + + memcpy(&opt.tag2queue, q->tag2queue, TC_80211_MAX_TAG + 1); + RTA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt); +*/ return skb->len; +/* +rtattr_failure: + skb_trim(skb, p - skb->data);*/ + return -1; +} + + +static int wme_classop_graft(struct Qdisc *qd, unsigned long arg, + struct Qdisc *new, struct Qdisc **old) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + unsigned long queue = arg - 1; + + if (queue >= hw->queues) + return -EINVAL; + + if (!new) + new = &noop_qdisc; + + sch_tree_lock(qd); + *old = q->queues[queue]; + q->queues[queue] = new; + qdisc_reset(*old); + sch_tree_unlock(qd); + + return 0; +} + + +static struct Qdisc * +wme_classop_leaf(struct Qdisc *qd, unsigned long arg) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + unsigned long queue = arg - 1; + + if (queue >= hw->queues) + return NULL; + + return q->queues[queue]; +} + + +static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid) +{ + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + unsigned long queue = TC_H_MIN(classid); + + if (queue - 1 >= hw->queues) + return 0; + + return queue; +} + + +static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent, + u32 classid) +{ + return wme_classop_get(qd, classid); +} + + +static void wme_classop_put(struct Qdisc *q, unsigned long cl) +{ +} + + +static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent, + struct rtattr **tca, unsigned long *arg) +{ + unsigned long cl = *arg; + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + + if (cl - 1 > hw->queues) + return -ENOENT; + + /* TODO: put code to program hardware queue parameters here, + * to allow programming from tc command line */ + + return 0; +} + + +/* we don't support deleting hardware queues + * when we add WMM-SA support - TSPECs may be deleted here */ +static int wme_classop_delete(struct Qdisc *qd, unsigned long cl) +{ + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + + if (cl - 1 > hw->queues) + return -ENOENT; + return 0; +} + + +static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl, + struct sk_buff *skb, struct tcmsg *tcm) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + + if (cl - 1 > hw->queues) + return -ENOENT; + tcm->tcm_handle = TC_H_MIN(cl); + tcm->tcm_parent = qd->handle; + tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */ + return 0; +} + + +static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg) +{ + struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); + struct ieee80211_hw *hw = &local->hw; + int queue; + + if (arg->stop) + return; + + for (queue = 0; queue < hw->queues; queue++) { + if (arg->count < arg->skip) { + arg->count++; + continue; + } + /* we should return classids for our internal queues here + * as well as the external ones */ + if (arg->fn(qd, queue+1, arg) < 0) { + arg->stop = 1; + break; + } + arg->count++; + } +} + + +static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd, + unsigned long cl) +{ + struct ieee80211_sched_data *q = qdisc_priv(qd); + + if (cl) + return NULL; + + return &q->filter_list; +} + + +/* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached) + * - these are the operations on the classes */ +static struct Qdisc_class_ops class_ops = +{ + .graft = wme_classop_graft, + .leaf = wme_classop_leaf, + + .get = wme_classop_get, + .put = wme_classop_put, + .change = wme_classop_change, + .delete = wme_classop_delete, + .walk = wme_classop_walk, + + .tcf_chain = wme_classop_find_tcf, + .bind_tcf = wme_classop_bind, + .unbind_tcf = wme_classop_put, + + .dump = wme_classop_dump_class, +}; + + +/* queueing discipline operations */ +static struct Qdisc_ops wme_qdisc_ops = +{ + .next = NULL, + .cl_ops = &class_ops, + .id = "ieee80211", + .priv_size = sizeof(struct ieee80211_sched_data), + + .enqueue = wme_qdiscop_enqueue, + .dequeue = wme_qdiscop_dequeue, + .requeue = wme_qdiscop_requeue, + .drop = NULL, /* drop not needed since we are always the root qdisc */ + + .init = wme_qdiscop_init, + .reset = wme_qdiscop_reset, + .destroy = wme_qdiscop_destroy, + .change = wme_qdiscop_tune, + + .dump = wme_qdiscop_dump, +}; + + +void ieee80211_install_qdisc(struct net_device *dev) +{ + struct Qdisc *qdisc; + + qdisc = qdisc_create_dflt(dev, &wme_qdisc_ops, TC_H_ROOT); + if (!qdisc) { + printk(KERN_ERR "%s: qdisc installation failed\n", dev->name); + return; + } + + /* same handle as would be allocated by qdisc_alloc_handle() */ + qdisc->handle = 0x80010000; + + qdisc_lock_tree(dev); + list_add_tail(&qdisc->list, &dev->qdisc_list); + dev->qdisc_sleeping = qdisc; + qdisc_unlock_tree(dev); +} + + +int ieee80211_qdisc_installed(struct net_device *dev) +{ + return dev->qdisc_sleeping->ops == &wme_qdisc_ops; +} + + +int ieee80211_wme_register(void) +{ + return register_qdisc(&wme_qdisc_ops); +} + + +void ieee80211_wme_unregister(void) +{ + unregister_qdisc(&wme_qdisc_ops); +} +#endif /* CONFIG_NET_SCHED */ diff --git a/net/mac80211/wme.h b/net/mac80211/wme.h new file mode 100644 index 00000000000..f0bff10f0e0 --- /dev/null +++ b/net/mac80211/wme.h @@ -0,0 +1,57 @@ +/* + * IEEE 802.11 driver (80211.o) - QoS datatypes + * Copyright 2004, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _WME_H +#define _WME_H + +#include <linux/netdevice.h> +#include "ieee80211_i.h" + +#define QOS_CONTROL_LEN 2 + +#define QOS_CONTROL_ACK_POLICY_NORMAL 0 +#define QOS_CONTROL_ACK_POLICY_NOACK 1 + +#define QOS_CONTROL_TID_MASK 0x0f +#define QOS_CONTROL_ACK_POLICY_SHIFT 5 + +#define QOS_CONTROL_TAG1D_MASK 0x07 + +ieee80211_txrx_result +ieee80211_rx_h_parse_qos(struct ieee80211_txrx_data *rx); + +ieee80211_txrx_result +ieee80211_rx_h_remove_qos_control(struct ieee80211_txrx_data *rx); + +#ifdef CONFIG_NET_SCHED +void ieee80211_install_qdisc(struct net_device *dev); +int ieee80211_qdisc_installed(struct net_device *dev); + +int ieee80211_wme_register(void); +void ieee80211_wme_unregister(void); +#else +static inline void ieee80211_install_qdisc(struct net_device *dev) +{ +} +static inline int ieee80211_qdisc_installed(struct net_device *dev) +{ + return 0; +} + +static inline int ieee80211_wme_register(void) +{ + return 0; +} +static inline void ieee80211_wme_unregister(void) +{ +} +#endif /* CONFIG_NET_SCHED */ + +#endif /* _WME_H */ diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c new file mode 100644 index 00000000000..783af32c691 --- /dev/null +++ b/net/mac80211/wpa.c @@ -0,0 +1,660 @@ +/* + * Copyright 2002-2004, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/netdevice.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/skbuff.h> +#include <linux/compiler.h> +#include <net/iw_handler.h> + +#include <net/mac80211.h> +#include "ieee80211_common.h" +#include "ieee80211_i.h" +#include "michael.h" +#include "tkip.h" +#include "aes_ccm.h" +#include "wpa.h" + +static int ieee80211_get_hdr_info(const struct sk_buff *skb, u8 **sa, u8 **da, + u8 *qos_tid, u8 **data, size_t *data_len) +{ + struct ieee80211_hdr *hdr; + size_t hdrlen; + u16 fc; + int a4_included; + u8 *pos; + + hdr = (struct ieee80211_hdr *) skb->data; + fc = le16_to_cpu(hdr->frame_control); + + hdrlen = 24; + if ((fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) == + (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { + hdrlen += ETH_ALEN; + *sa = hdr->addr4; + *da = hdr->addr3; + } else if (fc & IEEE80211_FCTL_FROMDS) { + *sa = hdr->addr3; + *da = hdr->addr1; + } else if (fc & IEEE80211_FCTL_TODS) { + *sa = hdr->addr2; + *da = hdr->addr3; + } else { + *sa = hdr->addr2; + *da = hdr->addr1; + } + + if (fc & 0x80) + hdrlen += 2; + + *data = skb->data + hdrlen; + *data_len = skb->len - hdrlen; + + a4_included = (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == + (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS); + if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && + fc & IEEE80211_STYPE_QOS_DATA) { + pos = (u8 *) &hdr->addr4; + if (a4_included) + pos += 6; + *qos_tid = pos[0] & 0x0f; + *qos_tid |= 0x80; /* qos_included flag */ + } else + *qos_tid = 0; + + return skb->len < hdrlen ? -1 : 0; +} + + +ieee80211_txrx_result +ieee80211_tx_h_michael_mic_add(struct ieee80211_txrx_data *tx) +{ + u8 *data, *sa, *da, *key, *mic, qos_tid; + size_t data_len; + u16 fc; + struct sk_buff *skb = tx->skb; + int authenticator; + int wpa_test = 0; + + fc = tx->fc; + + if (!tx->key || tx->key->alg != ALG_TKIP || skb->len < 24 || + !WLAN_FC_DATA_PRESENT(fc)) + return TXRX_CONTINUE; + + if (ieee80211_get_hdr_info(skb, &sa, &da, &qos_tid, &data, &data_len)) + return TXRX_DROP; + + if (!tx->key->force_sw_encrypt && + !tx->fragmented && + !(tx->local->hw.flags & IEEE80211_HW_TKIP_INCLUDE_MMIC) && + !wpa_test) { + /* hwaccel - with no need for preallocated room for Michael MIC + */ + return TXRX_CONTINUE; + } + + if (skb_tailroom(skb) < MICHAEL_MIC_LEN) { + I802_DEBUG_INC(tx->local->tx_expand_skb_head); + if (unlikely(pskb_expand_head(skb, TKIP_IV_LEN, + MICHAEL_MIC_LEN + TKIP_ICV_LEN, + GFP_ATOMIC))) { + printk(KERN_DEBUG "%s: failed to allocate more memory " + "for Michael MIC\n", tx->dev->name); + return TXRX_DROP; + } + } + +#if 0 + authenticator = fc & IEEE80211_FCTL_FROMDS; /* FIX */ +#else + authenticator = 1; +#endif + key = &tx->key->key[authenticator ? ALG_TKIP_TEMP_AUTH_TX_MIC_KEY : + ALG_TKIP_TEMP_AUTH_RX_MIC_KEY]; + mic = skb_put(skb, MICHAEL_MIC_LEN); + michael_mic(key, da, sa, qos_tid & 0x0f, data, data_len, mic); + + return TXRX_CONTINUE; +} + + +ieee80211_txrx_result +ieee80211_rx_h_michael_mic_verify(struct ieee80211_txrx_data *rx) +{ + u8 *data, *sa, *da, *key = NULL, qos_tid; + size_t data_len; + u16 fc; + u8 mic[MICHAEL_MIC_LEN]; + struct sk_buff *skb = rx->skb; + int authenticator = 1, wpa_test = 0; + + fc = rx->fc; + + /* If device handles decryption totally, skip this check */ + if ((rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) || + (rx->local->hw.flags & IEEE80211_HW_DEVICE_STRIPS_MIC)) + return TXRX_CONTINUE; + + if (!rx->key || rx->key->alg != ALG_TKIP || + !(rx->fc & IEEE80211_FCTL_PROTECTED) || !WLAN_FC_DATA_PRESENT(fc)) + return TXRX_CONTINUE; + + if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) && + !rx->key->force_sw_encrypt) { + if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { + if (skb->len < MICHAEL_MIC_LEN) + return TXRX_DROP; + } + /* Need to verify Michael MIC sometimes in software even when + * hwaccel is used. Atheros ar5212: fragmented frames and QoS + * frames. */ + if (!rx->fragmented && !wpa_test) + goto remove_mic; + } + + if (ieee80211_get_hdr_info(skb, &sa, &da, &qos_tid, &data, &data_len) + || data_len < MICHAEL_MIC_LEN) + return TXRX_DROP; + + data_len -= MICHAEL_MIC_LEN; + +#if 0 + authenticator = fc & IEEE80211_FCTL_TODS; /* FIX */ +#else + authenticator = 1; +#endif + key = &rx->key->key[authenticator ? ALG_TKIP_TEMP_AUTH_RX_MIC_KEY : + ALG_TKIP_TEMP_AUTH_TX_MIC_KEY]; + michael_mic(key, da, sa, qos_tid & 0x0f, data, data_len, mic); + if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0 || wpa_test) { + if (!rx->u.rx.ra_match) + return TXRX_DROP; + + printk(KERN_DEBUG "%s: invalid Michael MIC in data frame from " + MAC_FMT "\n", rx->dev->name, MAC_ARG(sa)); + + do { + struct ieee80211_hdr *hdr; + union iwreq_data wrqu; + char *buf = kmalloc(128, GFP_ATOMIC); + if (!buf) + break; + + /* TODO: needed parameters: count, key type, TSC */ + hdr = (struct ieee80211_hdr *) skb->data; + sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" + "keyid=%d %scast addr=" MAC_FMT ")", + rx->key->keyidx, + hdr->addr1[0] & 0x01 ? "broad" : "uni", + MAC_ARG(hdr->addr2)); + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = strlen(buf); + wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf); + kfree(buf); + } while (0); + + if (!rx->local->apdev) + return TXRX_DROP; + + ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, + ieee80211_msg_michael_mic_failure); + + return TXRX_QUEUED; + } + + remove_mic: + /* remove Michael MIC from payload */ + skb_trim(skb, skb->len - MICHAEL_MIC_LEN); + + return TXRX_CONTINUE; +} + + +static int tkip_encrypt_skb(struct ieee80211_txrx_data *tx, + struct sk_buff *skb, int test) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct ieee80211_key *key = tx->key; + int hdrlen, len, tailneed; + u16 fc; + u8 *pos; + + fc = le16_to_cpu(hdr->frame_control); + hdrlen = ieee80211_get_hdrlen(fc); + len = skb->len - hdrlen; + + tailneed = !tx->key->force_sw_encrypt ? 0 : TKIP_ICV_LEN; + if ((skb_headroom(skb) < TKIP_IV_LEN || + skb_tailroom(skb) < tailneed)) { + I802_DEBUG_INC(tx->local->tx_expand_skb_head); + if (unlikely(pskb_expand_head(skb, TKIP_IV_LEN, tailneed, + GFP_ATOMIC))) + return -1; + } + + pos = skb_push(skb, TKIP_IV_LEN); + memmove(pos, pos + TKIP_IV_LEN, hdrlen); + pos += hdrlen; + + /* Increase IV for the frame */ + key->u.tkip.iv16++; + if (key->u.tkip.iv16 == 0) + key->u.tkip.iv32++; + + if (!tx->key->force_sw_encrypt) { + u32 flags = tx->local->hw.flags; + hdr = (struct ieee80211_hdr *)skb->data; + + /* hwaccel - with preallocated room for IV */ + ieee80211_tkip_add_iv(pos, key, + (u8) (key->u.tkip.iv16 >> 8), + (u8) (((key->u.tkip.iv16 >> 8) | 0x20) & + 0x7f), + (u8) key->u.tkip.iv16); + + if (flags & IEEE80211_HW_TKIP_REQ_PHASE2_KEY) + ieee80211_tkip_gen_rc4key(key, hdr->addr2, + tx->u.tx.control->tkip_key); + else if (flags & IEEE80211_HW_TKIP_REQ_PHASE1_KEY) { + if (key->u.tkip.iv16 == 0 || + !key->u.tkip.tx_initialized) { + ieee80211_tkip_gen_phase1key(key, hdr->addr2, + (u16 *)tx->u.tx.control->tkip_key); + key->u.tkip.tx_initialized = 1; + tx->u.tx.control->flags |= + IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY; + } else + tx->u.tx.control->flags &= + ~IEEE80211_TXCTL_TKIP_NEW_PHASE1_KEY; + } + + tx->u.tx.control->key_idx = tx->key->hw_key_idx; + return 0; + } + + /* Add room for ICV */ + skb_put(skb, TKIP_ICV_LEN); + + hdr = (struct ieee80211_hdr *) skb->data; + ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm, + key, pos, len, hdr->addr2); + return 0; +} + + +ieee80211_txrx_result +ieee80211_tx_h_tkip_encrypt(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + u16 fc; + struct ieee80211_key *key = tx->key; + struct sk_buff *skb = tx->skb; + int wpa_test = 0, test = 0; + + fc = le16_to_cpu(hdr->frame_control); + + if (!key || key->alg != ALG_TKIP || !WLAN_FC_DATA_PRESENT(fc)) + return TXRX_CONTINUE; + + tx->u.tx.control->icv_len = TKIP_ICV_LEN; + tx->u.tx.control->iv_len = TKIP_IV_LEN; + ieee80211_tx_set_iswep(tx); + + if (!tx->key->force_sw_encrypt && + !(tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && + !wpa_test) { + /* hwaccel - with no need for preallocated room for IV/ICV */ + tx->u.tx.control->key_idx = tx->key->hw_key_idx; + return TXRX_CONTINUE; + } + + if (tkip_encrypt_skb(tx, skb, test) < 0) + return TXRX_DROP; + + if (tx->u.tx.extra_frag) { + int i; + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + if (tkip_encrypt_skb(tx, tx->u.tx.extra_frag[i], test) + < 0) + return TXRX_DROP; + } + } + + return TXRX_CONTINUE; +} + + +ieee80211_txrx_result +ieee80211_rx_h_tkip_decrypt(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; + u16 fc; + int hdrlen, res, hwaccel = 0, wpa_test = 0; + struct ieee80211_key *key = rx->key; + struct sk_buff *skb = rx->skb; + + fc = le16_to_cpu(hdr->frame_control); + hdrlen = ieee80211_get_hdrlen(fc); + + if (!rx->key || rx->key->alg != ALG_TKIP || + !(rx->fc & IEEE80211_FCTL_PROTECTED) || + (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) + return TXRX_CONTINUE; + + if (!rx->sta || skb->len - hdrlen < 12) + return TXRX_DROP; + + if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) && + !rx->key->force_sw_encrypt) { + if (!(rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV)) { + /* Hardware takes care of all processing, including + * replay protection, so no need to continue here. */ + return TXRX_CONTINUE; + } + + /* let TKIP code verify IV, but skip decryption */ + hwaccel = 1; + } + + res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm, + key, skb->data + hdrlen, + skb->len - hdrlen, rx->sta->addr, + hwaccel, rx->u.rx.queue); + if (res != TKIP_DECRYPT_OK || wpa_test) { + printk(KERN_DEBUG "%s: TKIP decrypt failed for RX frame from " + MAC_FMT " (res=%d)\n", + rx->dev->name, MAC_ARG(rx->sta->addr), res); + return TXRX_DROP; + } + + /* Trim ICV */ + skb_trim(skb, skb->len - TKIP_ICV_LEN); + + /* Remove IV */ + memmove(skb->data + TKIP_IV_LEN, skb->data, hdrlen); + skb_pull(skb, TKIP_IV_LEN); + + return TXRX_CONTINUE; +} + + +static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad, + int encrypted) +{ + u16 fc; + int a4_included, qos_included; + u8 qos_tid, *fc_pos, *data, *sa, *da; + int len_a; + size_t data_len; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + + fc_pos = (u8 *) &hdr->frame_control; + fc = fc_pos[0] ^ (fc_pos[1] << 8); + a4_included = (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == + (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS); + + ieee80211_get_hdr_info(skb, &sa, &da, &qos_tid, &data, &data_len); + data_len -= CCMP_HDR_LEN + (encrypted ? CCMP_MIC_LEN : 0); + if (qos_tid & 0x80) { + qos_included = 1; + qos_tid &= 0x0f; + } else + qos_included = 0; + /* First block, b_0 */ + + b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */ + /* Nonce: QoS Priority | A2 | PN */ + b_0[1] = qos_tid; + memcpy(&b_0[2], hdr->addr2, 6); + memcpy(&b_0[8], pn, CCMP_PN_LEN); + /* l(m) */ + b_0[14] = (data_len >> 8) & 0xff; + b_0[15] = data_len & 0xff; + + + /* AAD (extra authenticate-only data) / masked 802.11 header + * FC | A1 | A2 | A3 | SC | [A4] | [QC] */ + + len_a = a4_included ? 28 : 22; + if (qos_included) + len_a += 2; + + aad[0] = 0; /* (len_a >> 8) & 0xff; */ + aad[1] = len_a & 0xff; + /* Mask FC: zero subtype b4 b5 b6 */ + aad[2] = fc_pos[0] & ~(BIT(4) | BIT(5) | BIT(6)); + /* Retry, PwrMgt, MoreData; set Protected */ + aad[3] = (fc_pos[1] & ~(BIT(3) | BIT(4) | BIT(5))) | BIT(6); + memcpy(&aad[4], &hdr->addr1, 18); + + /* Mask Seq#, leave Frag# */ + aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f; + aad[23] = 0; + if (a4_included) { + memcpy(&aad[24], hdr->addr4, 6); + aad[30] = 0; + aad[31] = 0; + } else + memset(&aad[24], 0, 8); + if (qos_included) { + u8 *dpos = &aad[a4_included ? 30 : 24]; + + /* Mask QoS Control field */ + dpos[0] = qos_tid; + dpos[1] = 0; + } +} + + +static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id) +{ + hdr[0] = pn[5]; + hdr[1] = pn[4]; + hdr[2] = 0; + hdr[3] = 0x20 | (key_id << 6); + hdr[4] = pn[3]; + hdr[5] = pn[2]; + hdr[6] = pn[1]; + hdr[7] = pn[0]; +} + + +static inline int ccmp_hdr2pn(u8 *pn, u8 *hdr) +{ + pn[0] = hdr[7]; + pn[1] = hdr[6]; + pn[2] = hdr[5]; + pn[3] = hdr[4]; + pn[4] = hdr[1]; + pn[5] = hdr[0]; + return (hdr[3] >> 6) & 0x03; +} + + +static int ccmp_encrypt_skb(struct ieee80211_txrx_data *tx, + struct sk_buff *skb, int test) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct ieee80211_key *key = tx->key; + int hdrlen, len, tailneed; + u16 fc; + u8 *pos, *pn, *b_0, *aad, *scratch; + int i; + + scratch = key->u.ccmp.tx_crypto_buf; + b_0 = scratch + 3 * AES_BLOCK_LEN; + aad = scratch + 4 * AES_BLOCK_LEN; + + fc = le16_to_cpu(hdr->frame_control); + hdrlen = ieee80211_get_hdrlen(fc); + len = skb->len - hdrlen; + + tailneed = !key->force_sw_encrypt ? 0 : CCMP_MIC_LEN; + + if ((skb_headroom(skb) < CCMP_HDR_LEN || + skb_tailroom(skb) < tailneed)) { + I802_DEBUG_INC(tx->local->tx_expand_skb_head); + if (unlikely(pskb_expand_head(skb, CCMP_HDR_LEN, tailneed, + GFP_ATOMIC))) + return -1; + } + + pos = skb_push(skb, CCMP_HDR_LEN); + memmove(pos, pos + CCMP_HDR_LEN, hdrlen); + hdr = (struct ieee80211_hdr *) pos; + pos += hdrlen; + + /* PN = PN + 1 */ + pn = key->u.ccmp.tx_pn; + + for (i = CCMP_PN_LEN - 1; i >= 0; i--) { + pn[i]++; + if (pn[i]) + break; + } + + ccmp_pn2hdr(pos, pn, key->keyidx); + + if (!key->force_sw_encrypt) { + /* hwaccel - with preallocated room for CCMP header */ + tx->u.tx.control->key_idx = key->hw_key_idx; + return 0; + } + + pos += CCMP_HDR_LEN; + ccmp_special_blocks(skb, pn, b_0, aad, 0); + ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, scratch, b_0, aad, pos, len, + pos, skb_put(skb, CCMP_MIC_LEN)); + + return 0; +} + + +ieee80211_txrx_result +ieee80211_tx_h_ccmp_encrypt(struct ieee80211_txrx_data *tx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; + struct ieee80211_key *key = tx->key; + u16 fc; + struct sk_buff *skb = tx->skb; + int test = 0; + + fc = le16_to_cpu(hdr->frame_control); + + if (!key || key->alg != ALG_CCMP || !WLAN_FC_DATA_PRESENT(fc)) + return TXRX_CONTINUE; + + tx->u.tx.control->icv_len = CCMP_MIC_LEN; + tx->u.tx.control->iv_len = CCMP_HDR_LEN; + ieee80211_tx_set_iswep(tx); + + if (!tx->key->force_sw_encrypt && + !(tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV)) { + /* hwaccel - with no need for preallocated room for CCMP " + * header or MIC fields */ + tx->u.tx.control->key_idx = tx->key->hw_key_idx; + return TXRX_CONTINUE; + } + + if (ccmp_encrypt_skb(tx, skb, test) < 0) + return TXRX_DROP; + + if (tx->u.tx.extra_frag) { + int i; + + for (i = 0; i < tx->u.tx.num_extra_frag; i++) { + if (ccmp_encrypt_skb(tx, tx->u.tx.extra_frag[i], test) + < 0) + return TXRX_DROP; + } + } + + return TXRX_CONTINUE; +} + + +ieee80211_txrx_result +ieee80211_rx_h_ccmp_decrypt(struct ieee80211_txrx_data *rx) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; + u16 fc; + int hdrlen; + struct ieee80211_key *key = rx->key; + struct sk_buff *skb = rx->skb; + u8 pn[CCMP_PN_LEN]; + int data_len; + + fc = le16_to_cpu(hdr->frame_control); + hdrlen = ieee80211_get_hdrlen(fc); + + if (!key || key->alg != ALG_CCMP || + !(rx->fc & IEEE80211_FCTL_PROTECTED) || + (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) + return TXRX_CONTINUE; + + data_len = skb->len - hdrlen - CCMP_HDR_LEN - CCMP_MIC_LEN; + if (!rx->sta || data_len < 0) + return TXRX_DROP; + + if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) && + !key->force_sw_encrypt && + !(rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV)) + return TXRX_CONTINUE; + + (void) ccmp_hdr2pn(pn, skb->data + hdrlen); + + if (memcmp(pn, key->u.ccmp.rx_pn[rx->u.rx.queue], CCMP_PN_LEN) <= 0) { +#ifdef CONFIG_MAC80211_DEBUG + u8 *ppn = key->u.ccmp.rx_pn[rx->u.rx.queue]; + printk(KERN_DEBUG "%s: CCMP replay detected for RX frame from " + MAC_FMT " (RX PN %02x%02x%02x%02x%02x%02x <= prev. PN " + "%02x%02x%02x%02x%02x%02x)\n", rx->dev->name, + MAC_ARG(rx->sta->addr), + pn[0], pn[1], pn[2], pn[3], pn[4], pn[5], + ppn[0], ppn[1], ppn[2], ppn[3], ppn[4], ppn[5]); +#endif /* CONFIG_MAC80211_DEBUG */ + key->u.ccmp.replays++; + return TXRX_DROP; + } + + if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) && + !key->force_sw_encrypt) { + /* hwaccel has already decrypted frame and verified MIC */ + } else { + u8 *scratch, *b_0, *aad; + + scratch = key->u.ccmp.rx_crypto_buf; + b_0 = scratch + 3 * AES_BLOCK_LEN; + aad = scratch + 4 * AES_BLOCK_LEN; + + ccmp_special_blocks(skb, pn, b_0, aad, 1); + + if (ieee80211_aes_ccm_decrypt( + key->u.ccmp.tfm, scratch, b_0, aad, + skb->data + hdrlen + CCMP_HDR_LEN, data_len, + skb->data + skb->len - CCMP_MIC_LEN, + skb->data + hdrlen + CCMP_HDR_LEN)) { + printk(KERN_DEBUG "%s: CCMP decrypt failed for RX " + "frame from " MAC_FMT "\n", rx->dev->name, + MAC_ARG(rx->sta->addr)); + return TXRX_DROP; + } + } + + memcpy(key->u.ccmp.rx_pn[rx->u.rx.queue], pn, CCMP_PN_LEN); + + /* Remove CCMP header and MIC */ + skb_trim(skb, skb->len - CCMP_MIC_LEN); + memmove(skb->data + CCMP_HDR_LEN, skb->data, hdrlen); + skb_pull(skb, CCMP_HDR_LEN); + + return TXRX_CONTINUE; +} + diff --git a/net/mac80211/wpa.h b/net/mac80211/wpa.h new file mode 100644 index 00000000000..da3b9594f9c --- /dev/null +++ b/net/mac80211/wpa.h @@ -0,0 +1,31 @@ +/* + * Copyright 2002-2004, Instant802 Networks, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef WPA_H +#define WPA_H + +#include <linux/skbuff.h> +#include <linux/types.h> +#include "ieee80211_i.h" + +ieee80211_txrx_result +ieee80211_tx_h_michael_mic_add(struct ieee80211_txrx_data *tx); +ieee80211_txrx_result +ieee80211_rx_h_michael_mic_verify(struct ieee80211_txrx_data *rx); + +ieee80211_txrx_result +ieee80211_tx_h_tkip_encrypt(struct ieee80211_txrx_data *tx); +ieee80211_txrx_result +ieee80211_rx_h_tkip_decrypt(struct ieee80211_txrx_data *rx); + +ieee80211_txrx_result +ieee80211_tx_h_ccmp_encrypt(struct ieee80211_txrx_data *tx); +ieee80211_txrx_result +ieee80211_rx_h_ccmp_decrypt(struct ieee80211_txrx_data *rx); + +#endif /* WPA_H */ |