/* * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc * * 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 #include #include #include #include #include #include #include #include #include #include #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 */