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Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
Jiri Bencf0706e82007-05-05 11:45:53 -070015 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
Geert Uytterhoeven5b323ed2007-05-08 18:40:27 -070019#include <linux/delay.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070020#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
Johannes Bergd0709a62008-02-25 16:27:46 +010027#include <linux/rtnetlink.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070028#include <net/iw_handler.h>
29#include <asm/types.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070030
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040033#include "rate.h"
34#include "led.h"
Luis Carlos Cobof709fc62008-02-23 15:17:12 +010035#include "mesh.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070036
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +030037#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
Jiri Bencf0706e82007-05-05 11:45:53 -070038#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
39#define IEEE80211_AUTH_MAX_TRIES 3
40#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41#define IEEE80211_ASSOC_MAX_TRIES 3
42#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
Luis Carlos Cobof709fc62008-02-23 15:17:12 +010043#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
Jiri Bencf0706e82007-05-05 11:45:53 -070044#define IEEE80211_PROBE_INTERVAL (60 * HZ)
45#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
46#define IEEE80211_SCAN_INTERVAL (2 * HZ)
47#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
Dan Williams872ba532008-06-04 13:59:34 -040048#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
Jiri Bencf0706e82007-05-05 11:45:53 -070049
50#define IEEE80211_PROBE_DELAY (HZ / 33)
51#define IEEE80211_CHANNEL_TIME (HZ / 33)
52#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
53#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
54#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
55#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
Luis Carlos Cobof709fc62008-02-23 15:17:12 +010056#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
Jiri Bencf0706e82007-05-05 11:45:53 -070057
58#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
59
60
Jiri Bencf0706e82007-05-05 11:45:53 -070061#define ERP_INFO_USE_PROTECTION BIT(1)
62
Ron Rindjunsky9f985b02007-11-26 16:14:32 +020063/* mgmt header + 1 byte action code */
64#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
65
66#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
67#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
68#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
Ron Rindjunsky688b88a2007-12-25 17:00:37 +020069#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
70#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
Ron Rindjunsky9f985b02007-11-26 16:14:32 +020071
Ron Rindjunsky07db2182007-12-25 17:00:33 +020072/* next values represent the buffer size for A-MPDU frame.
73 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
74#define IEEE80211_MIN_AMPDU_BUF 0x8
75#define IEEE80211_MAX_AMPDU_BUF 0x40
76
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120077static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
Jiri Bencf0706e82007-05-05 11:45:53 -070078 u8 *ssid, size_t ssid_len);
79static struct ieee80211_sta_bss *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120080ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
John W. Linvillecffdd302007-10-05 14:23:27 -040081 u8 *ssid, u8 ssid_len);
Johannes Berg3e122be2008-07-09 14:40:34 +020082static void ieee80211_rx_bss_put(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -070083 struct ieee80211_sta_bss *bss);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120084static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -070085 struct ieee80211_if_sta *ifsta);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120086static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata);
87static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -070088 u8 *ssid, size_t ssid_len);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +120089static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -070090 struct ieee80211_if_sta *ifsta);
Adrian Bunk712590d2008-04-21 11:47:51 +030091static void sta_rx_agg_session_timer_expired(unsigned long data);
Jiri Bencf0706e82007-05-05 11:45:53 -070092
93
Luis Carlos Coboee385852008-02-23 15:17:11 +010094void ieee802_11_parse_elems(u8 *start, size_t len,
95 struct ieee802_11_elems *elems)
Jiri Bencf0706e82007-05-05 11:45:53 -070096{
97 size_t left = len;
98 u8 *pos = start;
Jiri Bencf0706e82007-05-05 11:45:53 -070099
100 memset(elems, 0, sizeof(*elems));
Jouni Malinen43ac2ca2008-08-15 22:21:27 +0300101 elems->ie_start = start;
102 elems->total_len = len;
Jiri Bencf0706e82007-05-05 11:45:53 -0700103
104 while (left >= 2) {
105 u8 id, elen;
106
107 id = *pos++;
108 elen = *pos++;
109 left -= 2;
110
John W. Linville67a4cce2007-10-12 16:40:37 -0400111 if (elen > left)
112 return;
Jiri Bencf0706e82007-05-05 11:45:53 -0700113
114 switch (id) {
115 case WLAN_EID_SSID:
116 elems->ssid = pos;
117 elems->ssid_len = elen;
118 break;
119 case WLAN_EID_SUPP_RATES:
120 elems->supp_rates = pos;
121 elems->supp_rates_len = elen;
122 break;
123 case WLAN_EID_FH_PARAMS:
124 elems->fh_params = pos;
125 elems->fh_params_len = elen;
126 break;
127 case WLAN_EID_DS_PARAMS:
128 elems->ds_params = pos;
129 elems->ds_params_len = elen;
130 break;
131 case WLAN_EID_CF_PARAMS:
132 elems->cf_params = pos;
133 elems->cf_params_len = elen;
134 break;
135 case WLAN_EID_TIM:
136 elems->tim = pos;
137 elems->tim_len = elen;
138 break;
139 case WLAN_EID_IBSS_PARAMS:
140 elems->ibss_params = pos;
141 elems->ibss_params_len = elen;
142 break;
143 case WLAN_EID_CHALLENGE:
144 elems->challenge = pos;
145 elems->challenge_len = elen;
146 break;
147 case WLAN_EID_WPA:
148 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
149 pos[2] == 0xf2) {
150 /* Microsoft OUI (00:50:F2) */
151 if (pos[3] == 1) {
152 /* OUI Type 1 - WPA IE */
153 elems->wpa = pos;
154 elems->wpa_len = elen;
155 } else if (elen >= 5 && pos[3] == 2) {
156 if (pos[4] == 0) {
157 elems->wmm_info = pos;
158 elems->wmm_info_len = elen;
159 } else if (pos[4] == 1) {
160 elems->wmm_param = pos;
161 elems->wmm_param_len = elen;
162 }
163 }
164 }
165 break;
166 case WLAN_EID_RSN:
167 elems->rsn = pos;
168 elems->rsn_len = elen;
169 break;
170 case WLAN_EID_ERP_INFO:
171 elems->erp_info = pos;
172 elems->erp_info_len = elen;
173 break;
174 case WLAN_EID_EXT_SUPP_RATES:
175 elems->ext_supp_rates = pos;
176 elems->ext_supp_rates_len = elen;
177 break;
Ron Rindjunskyc7153502007-11-26 16:14:31 +0200178 case WLAN_EID_HT_CAPABILITY:
179 elems->ht_cap_elem = pos;
180 elems->ht_cap_elem_len = elen;
181 break;
182 case WLAN_EID_HT_EXTRA_INFO:
183 elems->ht_info_elem = pos;
184 elems->ht_info_elem_len = elen;
185 break;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100186 case WLAN_EID_MESH_ID:
187 elems->mesh_id = pos;
188 elems->mesh_id_len = elen;
189 break;
190 case WLAN_EID_MESH_CONFIG:
191 elems->mesh_config = pos;
192 elems->mesh_config_len = elen;
193 break;
194 case WLAN_EID_PEER_LINK:
195 elems->peer_link = pos;
196 elems->peer_link_len = elen;
197 break;
198 case WLAN_EID_PREQ:
199 elems->preq = pos;
200 elems->preq_len = elen;
201 break;
202 case WLAN_EID_PREP:
203 elems->prep = pos;
204 elems->prep_len = elen;
205 break;
206 case WLAN_EID_PERR:
207 elems->perr = pos;
208 elems->perr_len = elen;
209 break;
Assaf Kraussf2df3852008-06-15 18:23:29 +0300210 case WLAN_EID_CHANNEL_SWITCH:
211 elems->ch_switch_elem = pos;
212 elems->ch_switch_elem_len = elen;
213 break;
214 case WLAN_EID_QUIET:
215 if (!elems->quiet_elem) {
216 elems->quiet_elem = pos;
217 elems->quiet_elem_len = elen;
218 }
219 elems->num_of_quiet_elem++;
220 break;
221 case WLAN_EID_COUNTRY:
222 elems->country_elem = pos;
223 elems->country_elem_len = elen;
224 break;
225 case WLAN_EID_PWR_CONSTRAINT:
226 elems->pwr_constr_elem = pos;
227 elems->pwr_constr_elem_len = elen;
228 break;
Jiri Bencf0706e82007-05-05 11:45:53 -0700229 default:
Jiri Bencf0706e82007-05-05 11:45:53 -0700230 break;
231 }
232
233 left -= elen;
234 pos += elen;
235 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700236}
237
238
Jouni Malinen43ac2ca2008-08-15 22:21:27 +0300239static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
240{
241 u8 *end, *pos;
242
243 pos = bss->ies;
244 if (pos == NULL)
245 return NULL;
246 end = pos + bss->ies_len;
247
248 while (pos + 1 < end) {
249 if (pos + 2 + pos[1] > end)
250 break;
251 if (pos[0] == ie)
252 return pos;
253 pos += 2 + pos[1];
254 }
255
256 return NULL;
257}
258
259
Jiri Bencf0706e82007-05-05 11:45:53 -0700260static int ecw2cw(int ecw)
261{
Johannes Bergac2bf322008-02-14 00:30:35 +0100262 return (1 << ecw) - 1;
Jiri Bencf0706e82007-05-05 11:45:53 -0700263}
264
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100265
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200266static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100267 struct ieee80211_sta_bss *bss,
268 int ibss)
269{
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100270 struct ieee80211_local *local = sdata->local;
271 int i, have_higher_than_11mbit = 0;
272
273
274 /* cf. IEEE 802.11 9.2.12 */
275 for (i = 0; i < bss->supp_rates_len; i++)
276 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
277 have_higher_than_11mbit = 1;
278
279 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
280 have_higher_than_11mbit)
281 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
282 else
283 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
284
285
286 if (local->ops->conf_tx) {
287 struct ieee80211_tx_queue_params qparam;
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100288
289 memset(&qparam, 0, sizeof(qparam));
290
291 qparam.aifs = 2;
292
293 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
294 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
295 qparam.cw_min = 31;
296 else
297 qparam.cw_min = 15;
298
299 qparam.cw_max = 1023;
300 qparam.txop = 0;
301
Johannes Berge100bb62008-04-30 18:51:21 +0200302 for (i = 0; i < local_to_hw(local)->queues; i++)
303 local->ops->conf_tx(local_to_hw(local), i, &qparam);
Vladimir Koutnye2839d82008-03-18 21:14:07 +0100304 }
305}
306
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200307static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -0700308 struct ieee80211_if_sta *ifsta,
309 u8 *wmm_param, size_t wmm_param_len)
310{
Jiri Bencf0706e82007-05-05 11:45:53 -0700311 struct ieee80211_tx_queue_params params;
312 size_t left;
313 int count;
314 u8 *pos;
315
Johannes Berg3434fbd2008-05-03 00:59:37 +0200316 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
317 return;
318
319 if (!wmm_param)
320 return;
321
Jiri Bencf0706e82007-05-05 11:45:53 -0700322 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
323 return;
324 count = wmm_param[6] & 0x0f;
325 if (count == ifsta->wmm_last_param_set)
326 return;
327 ifsta->wmm_last_param_set = count;
328
329 pos = wmm_param + 8;
330 left = wmm_param_len - 8;
331
332 memset(&params, 0, sizeof(params));
333
334 if (!local->ops->conf_tx)
335 return;
336
337 local->wmm_acm = 0;
338 for (; left >= 4; left -= 4, pos += 4) {
339 int aci = (pos[0] >> 5) & 0x03;
340 int acm = (pos[0] >> 4) & 0x01;
341 int queue;
342
343 switch (aci) {
344 case 1:
Johannes Berge100bb62008-04-30 18:51:21 +0200345 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200346 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700347 local->wmm_acm |= BIT(0) | BIT(3);
Jiri Bencf0706e82007-05-05 11:45:53 -0700348 break;
349 case 2:
Johannes Berge100bb62008-04-30 18:51:21 +0200350 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200351 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700352 local->wmm_acm |= BIT(4) | BIT(5);
Jiri Bencf0706e82007-05-05 11:45:53 -0700353 break;
354 case 3:
Johannes Berge100bb62008-04-30 18:51:21 +0200355 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200356 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700357 local->wmm_acm |= BIT(6) | BIT(7);
Jiri Bencf0706e82007-05-05 11:45:53 -0700358 break;
359 case 0:
360 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200361 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200362 if (acm)
Jiri Bencf0706e82007-05-05 11:45:53 -0700363 local->wmm_acm |= BIT(1) | BIT(2);
Jiri Bencf0706e82007-05-05 11:45:53 -0700364 break;
365 }
366
367 params.aifs = pos[0] & 0x0f;
368 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
369 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200370 params.txop = get_unaligned_le16(pos + 2);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200371#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700372 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Johannes Berg3330d7b2008-02-10 16:49:38 +0100373 "cWmin=%d cWmax=%d txop=%d\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200374 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
Johannes Berg3330d7b2008-02-10 16:49:38 +0100375 params.cw_max, params.txop);
376#endif
Jiri Bencf0706e82007-05-05 11:45:53 -0700377 /* TODO: handle ACM (block TX, fallback to next lowest allowed
378 * AC for now) */
379 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
380 printk(KERN_DEBUG "%s: failed to set TX queue "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200381 "parameters for queue %d\n", local->mdev->name, queue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700382 }
383 }
384}
385
John W. Linville50c4afb2008-04-15 14:09:27 -0400386static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
387 bool use_protection,
388 bool use_short_preamble)
Daniel Drake56282212007-07-10 19:32:10 +0200389{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100390 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
Tomas Winklerebd74482008-07-01 10:44:50 +0300391#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake56282212007-07-10 19:32:10 +0200392 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Joe Perches0795af52007-10-03 17:59:30 -0700393 DECLARE_MAC_BUF(mac);
Tomas Winklerebd74482008-07-01 10:44:50 +0300394#endif
Johannes Berg471b3ef2007-12-28 14:32:58 +0100395 u32 changed = 0;
Daniel Drake56282212007-07-10 19:32:10 +0200396
Johannes Berg471b3ef2007-12-28 14:32:58 +0100397 if (use_protection != bss_conf->use_cts_prot) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200398#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake56282212007-07-10 19:32:10 +0200399 if (net_ratelimit()) {
400 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
Joe Perches0795af52007-10-03 17:59:30 -0700401 "%s)\n",
Johannes Berg471b3ef2007-12-28 14:32:58 +0100402 sdata->dev->name,
Daniel Drake56282212007-07-10 19:32:10 +0200403 use_protection ? "enabled" : "disabled",
Joe Perches0795af52007-10-03 17:59:30 -0700404 print_mac(mac, ifsta->bssid));
Daniel Drake56282212007-07-10 19:32:10 +0200405 }
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200406#endif
Johannes Berg471b3ef2007-12-28 14:32:58 +0100407 bss_conf->use_cts_prot = use_protection;
408 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200409 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200410
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200411 if (use_short_preamble != bss_conf->use_short_preamble) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200412#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Daniel Drake7e9ed182007-07-27 15:43:24 +0200413 if (net_ratelimit()) {
414 printk(KERN_DEBUG "%s: switched to %s barker preamble"
Joe Perches0795af52007-10-03 17:59:30 -0700415 " (BSSID=%s)\n",
Johannes Berg471b3ef2007-12-28 14:32:58 +0100416 sdata->dev->name,
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200417 use_short_preamble ? "short" : "long",
Joe Perches0795af52007-10-03 17:59:30 -0700418 print_mac(mac, ifsta->bssid));
Daniel Drake7e9ed182007-07-27 15:43:24 +0200419 }
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200420#endif
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200421 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100422 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200423 }
Daniel Draked9430a32007-07-27 15:43:24 +0200424
Johannes Berg471b3ef2007-12-28 14:32:58 +0100425 return changed;
Daniel Drake56282212007-07-10 19:32:10 +0200426}
427
John W. Linville50c4afb2008-04-15 14:09:27 -0400428static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
429 u8 erp_value)
430{
431 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
432 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
433
434 return ieee80211_handle_protect_preamb(sdata,
435 use_protection, use_short_preamble);
436}
437
438static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
439 struct ieee80211_sta_bss *bss)
440{
441 u32 changed = 0;
442
443 if (bss->has_erp_value)
444 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
445 else {
446 u16 capab = bss->capability;
447 changed |= ieee80211_handle_protect_preamb(sdata, false,
448 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
449 }
450
451 return changed;
452}
453
Ron Rindjunskyc7153502007-11-26 16:14:31 +0200454int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
455 struct ieee80211_ht_info *ht_info)
456{
457
458 if (ht_info == NULL)
459 return -EINVAL;
460
461 memset(ht_info, 0, sizeof(*ht_info));
462
463 if (ht_cap_ie) {
464 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
465
466 ht_info->ht_supported = 1;
467 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
468 ht_info->ampdu_factor =
469 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
470 ht_info->ampdu_density =
471 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
472 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
473 } else
474 ht_info->ht_supported = 0;
475
476 return 0;
477}
478
479int ieee80211_ht_addt_info_ie_to_ht_bss_info(
480 struct ieee80211_ht_addt_info *ht_add_info_ie,
481 struct ieee80211_ht_bss_info *bss_info)
482{
483 if (bss_info == NULL)
484 return -EINVAL;
485
486 memset(bss_info, 0, sizeof(*bss_info));
487
488 if (ht_add_info_ie) {
489 u16 op_mode;
490 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
491
492 bss_info->primary_channel = ht_add_info_ie->control_chan;
493 bss_info->bss_cap = ht_add_info_ie->ht_param;
494 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
495 }
496
497 return 0;
498}
Daniel Drake56282212007-07-10 19:32:10 +0200499
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200500static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700501 struct ieee80211_if_sta *ifsta)
502{
Jiri Bencf0706e82007-05-05 11:45:53 -0700503 union iwreq_data wrqu;
504
Jiri Bencf0706e82007-05-05 11:45:53 -0700505 if (ifsta->assocreq_ies) {
Jouni Malinen087d8332008-08-19 10:54:32 +0300506 memset(&wrqu, 0, sizeof(wrqu));
507 wrqu.data.length = ifsta->assocreq_ies_len;
David S. Millerb171e192008-08-29 23:06:00 -0700508 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
Jouni Malinen087d8332008-08-19 10:54:32 +0300509 ifsta->assocreq_ies);
Jiri Bencf0706e82007-05-05 11:45:53 -0700510 }
511 if (ifsta->assocresp_ies) {
Jouni Malinen087d8332008-08-19 10:54:32 +0300512 memset(&wrqu, 0, sizeof(wrqu));
513 wrqu.data.length = ifsta->assocresp_ies_len;
David S. Millerb171e192008-08-29 23:06:00 -0700514 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
Jouni Malinen087d8332008-08-19 10:54:32 +0300515 ifsta->assocresp_ies);
Jiri Bencf0706e82007-05-05 11:45:53 -0700516 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700517}
518
519
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200520static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400521 struct ieee80211_if_sta *ifsta,
Michael Buesch47f0c502007-09-27 15:10:44 +0200522 bool assoc)
Jiri Bencf0706e82007-05-05 11:45:53 -0700523{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100524 struct ieee80211_local *local = sdata->local;
Tomas Winkler38668c02008-03-28 16:33:32 -0700525 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
Jiri Bencf0706e82007-05-05 11:45:53 -0700526 union iwreq_data wrqu;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100527 u32 changed = BSS_CHANGED_ASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -0700528
Jiri Bencf0706e82007-05-05 11:45:53 -0700529 if (assoc) {
Daniel Drake56282212007-07-10 19:32:10 +0200530 struct ieee80211_sta_bss *bss;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400531
532 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
533
Johannes Berg51fb61e2007-12-19 01:31:27 +0100534 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
Jiri Bencf0706e82007-05-05 11:45:53 -0700535 return;
Daniel Drake56282212007-07-10 19:32:10 +0200536
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200537 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Tomas Winkler38668c02008-03-28 16:33:32 -0700538 conf->channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -0400539 ifsta->ssid, ifsta->ssid_len);
Daniel Drake56282212007-07-10 19:32:10 +0200540 if (bss) {
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700541 /* set timing information */
542 sdata->bss_conf.beacon_int = bss->beacon_int;
543 sdata->bss_conf.timestamp = bss->timestamp;
Emmanuel Grumbach98f7dfd2008-07-18 13:52:59 +0800544 sdata->bss_conf.dtim_period = bss->dtim_period;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700545
John W. Linville50c4afb2008-04-15 14:09:27 -0400546 changed |= ieee80211_handle_bss_capability(sdata, bss);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700547
Johannes Berg3e122be2008-07-09 14:40:34 +0200548 ieee80211_rx_bss_put(local, bss);
Daniel Drake56282212007-07-10 19:32:10 +0200549 }
550
Tomas Winkler38668c02008-03-28 16:33:32 -0700551 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
552 changed |= BSS_CHANGED_HT;
553 sdata->bss_conf.assoc_ht = 1;
554 sdata->bss_conf.ht_conf = &conf->ht_conf;
555 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
556 }
557
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400558 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
Jiri Bencf0706e82007-05-05 11:45:53 -0700559 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
560 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200561 ieee80211_sta_send_associnfo(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -0700562 } else {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200563 netif_carrier_off(sdata->dev);
564 ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid);
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400565 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200566 changed |= ieee80211_reset_erp_info(sdata);
Tomas Winkler38668c02008-03-28 16:33:32 -0700567
568 sdata->bss_conf.assoc_ht = 0;
569 sdata->bss_conf.ht_conf = NULL;
570 sdata->bss_conf.ht_bss_conf = NULL;
571
Jiri Bencf0706e82007-05-05 11:45:53 -0700572 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
573 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700574 ifsta->last_probe = jiffies;
Michael Buesch47f0c502007-09-27 15:10:44 +0200575 ieee80211_led_assoc(local, assoc);
Johannes Berg471b3ef2007-12-28 14:32:58 +0100576
Tomas Winklerb2205252008-01-27 16:18:22 +0200577 sdata->bss_conf.assoc = assoc;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100578 ieee80211_bss_info_change_notify(sdata, changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300579
580 if (assoc)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200581 netif_carrier_on(sdata->dev);
Guy Cohen8db93692008-07-03 19:56:13 +0300582
Reinette Chatre41a7be42008-04-03 16:08:49 -0700583 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200584 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
Jiri Bencf0706e82007-05-05 11:45:53 -0700585}
586
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200587static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700588 struct ieee80211_if_sta *ifsta, int deauth)
589{
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300590 if (deauth) {
591 ifsta->direct_probe_tries = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700592 ifsta->auth_tries = 0;
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300593 }
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +0300594 ifsta->assoc_scan_tries = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700595 ifsta->assoc_tries = 0;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200596 ieee80211_set_associated(sdata, ifsta, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700597}
598
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200599void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
Luis Carlos Coboee385852008-02-23 15:17:11 +0100600 int encrypt)
Jiri Bencf0706e82007-05-05 11:45:53 -0700601{
Jiri Bencf0706e82007-05-05 11:45:53 -0700602 skb->dev = sdata->local->mdev;
603 skb_set_mac_header(skb, 0);
604 skb_set_network_header(skb, 0);
605 skb_set_transport_header(skb, 0);
606
Johannes Bergd0f09802008-07-29 11:32:07 +0200607 skb->iif = sdata->dev->ifindex;
608 skb->do_not_encrypt = !encrypt;
Jiri Bencf0706e82007-05-05 11:45:53 -0700609
610 dev_queue_xmit(skb);
611}
612
613
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200614static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700615 struct ieee80211_if_sta *ifsta,
616 int transaction, u8 *extra, size_t extra_len,
617 int encrypt)
618{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200619 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700620 struct sk_buff *skb;
621 struct ieee80211_mgmt *mgmt;
622
623 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
624 sizeof(*mgmt) + 6 + extra_len);
625 if (!skb) {
626 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200627 "frame\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -0700628 return;
629 }
630 skb_reserve(skb, local->hw.extra_tx_headroom);
631
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
633 memset(mgmt, 0, 24 + 6);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700634 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
635 IEEE80211_STYPE_AUTH);
Jiri Bencf0706e82007-05-05 11:45:53 -0700636 if (encrypt)
637 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
638 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200639 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -0700640 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
641 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
642 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
643 ifsta->auth_transaction = transaction + 1;
644 mgmt->u.auth.status_code = cpu_to_le16(0);
645 if (extra)
646 memcpy(skb_put(skb, extra_len), extra, extra_len);
647
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200648 ieee80211_sta_tx(sdata, skb, encrypt);
Jiri Bencf0706e82007-05-05 11:45:53 -0700649}
650
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300651static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
652 struct ieee80211_if_sta *ifsta)
653{
654 DECLARE_MAC_BUF(mac);
655
656 ifsta->direct_probe_tries++;
657 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
658 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
659 sdata->dev->name, print_mac(mac, ifsta->bssid));
660 ifsta->state = IEEE80211_STA_MLME_DISABLED;
661 return;
662 }
663
664 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
665 sdata->dev->name, print_mac(mac, ifsta->bssid),
666 ifsta->direct_probe_tries);
667
668 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
669
670 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
671
672 /* Direct probe is sent to broadcast address as some APs
673 * will not answer to direct packet in unassociated state.
674 */
675 ieee80211_send_probe_req(sdata, NULL,
676 ifsta->ssid, ifsta->ssid_len);
677
678 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
679}
680
Jiri Bencf0706e82007-05-05 11:45:53 -0700681
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200682static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700683 struct ieee80211_if_sta *ifsta)
684{
Joe Perches0795af52007-10-03 17:59:30 -0700685 DECLARE_MAC_BUF(mac);
686
Jiri Bencf0706e82007-05-05 11:45:53 -0700687 ifsta->auth_tries++;
688 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
Joe Perches0795af52007-10-03 17:59:30 -0700689 printk(KERN_DEBUG "%s: authentication with AP %s"
Jiri Bencf0706e82007-05-05 11:45:53 -0700690 " timed out\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200691 sdata->dev->name, print_mac(mac, ifsta->bssid));
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300692 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jiri Bencf0706e82007-05-05 11:45:53 -0700693 return;
694 }
695
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300696 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
Joe Perches0795af52007-10-03 17:59:30 -0700697 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200698 sdata->dev->name, print_mac(mac, ifsta->bssid));
Jiri Bencf0706e82007-05-05 11:45:53 -0700699
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200700 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700701
702 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
703}
704
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200705static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
706 struct ieee80211_supported_band *sband,
707 u64 *rates)
708{
709 int i, j, count;
710 *rates = 0;
711 count = 0;
712 for (i = 0; i < bss->supp_rates_len; i++) {
713 int rate = (bss->supp_rates[i] & 0x7F) * 5;
714
715 for (j = 0; j < sband->n_bitrates; j++)
716 if (sband->bitrates[j].bitrate == rate) {
717 *rates |= BIT(j);
718 count++;
719 break;
720 }
721 }
722
723 return count;
724}
Jiri Bencf0706e82007-05-05 11:45:53 -0700725
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200726static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700727 struct ieee80211_if_sta *ifsta)
728{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200729 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700730 struct sk_buff *skb;
731 struct ieee80211_mgmt *mgmt;
Jouni Malinen43ac2ca2008-08-15 22:21:27 +0300732 u8 *pos, *ies, *ht_add_ie;
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200733 int i, len, count, rates_len, supp_rates_len;
Jiri Bencf0706e82007-05-05 11:45:53 -0700734 u16 capab;
735 struct ieee80211_sta_bss *bss;
736 int wmm = 0;
Johannes Berg8318d782008-01-24 19:38:38 +0100737 struct ieee80211_supported_band *sband;
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200738 u64 rates = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700739
740 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
741 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
742 ifsta->ssid_len);
743 if (!skb) {
744 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200745 "frame\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -0700746 return;
747 }
748 skb_reserve(skb, local->hw.extra_tx_headroom);
749
Johannes Berg8318d782008-01-24 19:38:38 +0100750 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
751
Jiri Bencf0706e82007-05-05 11:45:53 -0700752 capab = ifsta->capab;
Johannes Berg8318d782008-01-24 19:38:38 +0100753
754 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
755 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
756 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
757 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
758 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
Jiri Bencf0706e82007-05-05 11:45:53 -0700759 }
Johannes Berg8318d782008-01-24 19:38:38 +0100760
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200761 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Johannes Berg8318d782008-01-24 19:38:38 +0100762 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -0400763 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -0700764 if (bss) {
765 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
766 capab |= WLAN_CAPABILITY_PRIVACY;
Jouni Malinen43ac2ca2008-08-15 22:21:27 +0300767 if (bss->wmm_used)
Jiri Bencf0706e82007-05-05 11:45:53 -0700768 wmm = 1;
Helmut Schaa0d580a72008-05-20 09:56:37 +0200769
770 /* get all rates supported by the device and the AP as
771 * some APs don't like getting a superset of their rates
772 * in the association request (e.g. D-Link DAP 1353 in
773 * b-only mode) */
774 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
775
Tomas Winkler06ff47b2008-06-18 17:53:44 +0300776 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
777 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
778 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
779
Johannes Berg3e122be2008-07-09 14:40:34 +0200780 ieee80211_rx_bss_put(local, bss);
Helmut Schaa0d580a72008-05-20 09:56:37 +0200781 } else {
782 rates = ~0;
783 rates_len = sband->n_bitrates;
Jiri Bencf0706e82007-05-05 11:45:53 -0700784 }
785
786 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
787 memset(mgmt, 0, 24);
788 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200789 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -0700790 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
791
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400792 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700793 skb_put(skb, 10);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700794 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
795 IEEE80211_STYPE_REASSOC_REQ);
Jiri Bencf0706e82007-05-05 11:45:53 -0700796 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
Tomas Winklerea95bba2008-07-18 13:53:00 +0800797 mgmt->u.reassoc_req.listen_interval =
798 cpu_to_le16(local->hw.conf.listen_interval);
Jiri Bencf0706e82007-05-05 11:45:53 -0700799 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
800 ETH_ALEN);
801 } else {
802 skb_put(skb, 4);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700803 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
804 IEEE80211_STYPE_ASSOC_REQ);
Jiri Bencf0706e82007-05-05 11:45:53 -0700805 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
Tomas Winklerea95bba2008-07-18 13:53:00 +0800806 mgmt->u.reassoc_req.listen_interval =
807 cpu_to_le16(local->hw.conf.listen_interval);
Jiri Bencf0706e82007-05-05 11:45:53 -0700808 }
809
810 /* SSID */
811 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
812 *pos++ = WLAN_EID_SSID;
813 *pos++ = ifsta->ssid_len;
814 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
815
Helmut Schaa0d580a72008-05-20 09:56:37 +0200816 /* add all rates which were marked to be used above */
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200817 supp_rates_len = rates_len;
818 if (supp_rates_len > 8)
819 supp_rates_len = 8;
Jiri Bencf0706e82007-05-05 11:45:53 -0700820
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200821 len = sband->n_bitrates;
822 pos = skb_put(skb, supp_rates_len + 2);
823 *pos++ = WLAN_EID_SUPP_RATES;
824 *pos++ = supp_rates_len;
825
826 count = 0;
827 for (i = 0; i < sband->n_bitrates; i++) {
828 if (BIT(i) & rates) {
Johannes Berg8318d782008-01-24 19:38:38 +0100829 int rate = sband->bitrates[i].bitrate;
Jiri Bencf0706e82007-05-05 11:45:53 -0700830 *pos++ = (u8) (rate / 5);
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200831 if (++count == 8)
832 break;
833 }
834 }
835
Jan-Espen Pettersen8ab65b02008-08-25 20:29:22 +0200836 if (rates_len > count) {
Helmut Schaa36d16ae2008-05-08 13:34:07 +0200837 pos = skb_put(skb, rates_len - count + 2);
838 *pos++ = WLAN_EID_EXT_SUPP_RATES;
839 *pos++ = rates_len - count;
840
841 for (i++; i < sband->n_bitrates; i++) {
842 if (BIT(i) & rates) {
843 int rate = sband->bitrates[i].bitrate;
844 *pos++ = (u8) (rate / 5);
845 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700846 }
847 }
848
Tomas Winkler06ff47b2008-06-18 17:53:44 +0300849 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
850 /* 1. power capabilities */
851 pos = skb_put(skb, 4);
852 *pos++ = WLAN_EID_PWR_CAPABILITY;
853 *pos++ = 2;
854 *pos++ = 0; /* min tx power */
855 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
856
857 /* 2. supported channels */
858 /* TODO: get this in reg domain format */
859 pos = skb_put(skb, 2 * sband->n_channels + 2);
860 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
861 *pos++ = 2 * sband->n_channels;
862 for (i = 0; i < sband->n_channels; i++) {
863 *pos++ = ieee80211_frequency_to_channel(
864 sband->channels[i].center_freq);
865 *pos++ = 1; /* one channel in the subband*/
866 }
867 }
868
Jiri Bencf0706e82007-05-05 11:45:53 -0700869 if (ifsta->extra_ie) {
870 pos = skb_put(skb, ifsta->extra_ie_len);
871 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
872 }
873
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400874 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700875 pos = skb_put(skb, 9);
876 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
877 *pos++ = 7; /* len */
878 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
879 *pos++ = 0x50;
880 *pos++ = 0xf2;
881 *pos++ = 2; /* WME */
882 *pos++ = 0; /* WME info */
883 *pos++ = 1; /* WME ver */
884 *pos++ = 0;
885 }
Johannes Berg3434fbd2008-05-03 00:59:37 +0200886
Ron Rindjunskyc7153502007-11-26 16:14:31 +0200887 /* wmm support is a must to HT */
Johannes Berg3434fbd2008-05-03 00:59:37 +0200888 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
Jouni Malinen43ac2ca2008-08-15 22:21:27 +0300889 sband->ht_info.ht_supported &&
890 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
Emmanuel Grumbach93061022008-05-29 16:35:23 +0800891 struct ieee80211_ht_addt_info *ht_add_info =
Jouni Malinen43ac2ca2008-08-15 22:21:27 +0300892 (struct ieee80211_ht_addt_info *)ht_add_ie;
Emmanuel Grumbach93061022008-05-29 16:35:23 +0800893 u16 cap = sband->ht_info.cap;
894 __le16 tmp;
895 u32 flags = local->hw.conf.channel->flags;
896
897 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
898 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
899 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
900 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
901 cap &= ~IEEE80211_HT_CAP_SGI_40;
902 }
903 break;
904 case IEEE80211_HT_IE_CHA_SEC_BELOW:
905 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
906 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
907 cap &= ~IEEE80211_HT_CAP_SGI_40;
908 }
909 break;
910 }
911
912 tmp = cpu_to_le16(cap);
Ron Rindjunskyc7153502007-11-26 16:14:31 +0200913 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
914 *pos++ = WLAN_EID_HT_CAPABILITY;
915 *pos++ = sizeof(struct ieee80211_ht_cap);
916 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
917 memcpy(pos, &tmp, sizeof(u16));
918 pos += sizeof(u16);
Johannes Berg8318d782008-01-24 19:38:38 +0100919 /* TODO: needs a define here for << 2 */
920 *pos++ = sband->ht_info.ampdu_factor |
921 (sband->ht_info.ampdu_density << 2);
922 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
Ron Rindjunskyc7153502007-11-26 16:14:31 +0200923 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700924
925 kfree(ifsta->assocreq_ies);
926 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
Michael Wu0ec0b7a2007-07-27 15:43:24 +0200927 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -0700928 if (ifsta->assocreq_ies)
929 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
930
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200931 ieee80211_sta_tx(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700932}
933
934
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200935static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700936 struct ieee80211_if_sta *ifsta, u16 reason)
937{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200938 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700939 struct sk_buff *skb;
940 struct ieee80211_mgmt *mgmt;
941
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
943 if (!skb) {
944 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200945 "frame\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -0700946 return;
947 }
948 skb_reserve(skb, local->hw.extra_tx_headroom);
949
950 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
951 memset(mgmt, 0, 24);
952 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200953 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -0700954 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700955 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
956 IEEE80211_STYPE_DEAUTH);
Jiri Bencf0706e82007-05-05 11:45:53 -0700957 skb_put(skb, 2);
958 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
959
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200960 ieee80211_sta_tx(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700961}
962
963
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200964static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700965 struct ieee80211_if_sta *ifsta, u16 reason)
966{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200967 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700968 struct sk_buff *skb;
969 struct ieee80211_mgmt *mgmt;
970
971 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
972 if (!skb) {
973 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200974 "frame\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -0700975 return;
976 }
977 skb_reserve(skb, local->hw.extra_tx_headroom);
978
979 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
980 memset(mgmt, 0, 24);
981 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200982 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -0700983 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
Harvey Harrisone7827a72008-07-15 18:44:13 -0700984 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
985 IEEE80211_STYPE_DISASSOC);
Jiri Bencf0706e82007-05-05 11:45:53 -0700986 skb_put(skb, 2);
987 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
988
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200989 ieee80211_sta_tx(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -0700990}
991
992
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200993static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700994 struct ieee80211_if_sta *ifsta)
995{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200996 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700997 struct ieee80211_sta_bss *bss;
Johannes Berg5b98b1f2007-11-03 13:11:10 +0000998 int bss_privacy;
999 int wep_privacy;
1000 int privacy_invoked;
Jiri Bencf0706e82007-05-05 11:45:53 -07001001
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001002 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
Jiri Bencf0706e82007-05-05 11:45:53 -07001003 return 0;
1004
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001005 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Johannes Berg8318d782008-01-24 19:38:38 +01001006 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04001007 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001008 if (!bss)
1009 return 0;
1010
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001011 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001012 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001013 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
Jiri Bencf0706e82007-05-05 11:45:53 -07001014
Johannes Berg3e122be2008-07-09 14:40:34 +02001015 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07001016
Johannes Berg5b98b1f2007-11-03 13:11:10 +00001017 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1018 return 0;
1019
1020 return 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001021}
1022
1023
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001024static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001025 struct ieee80211_if_sta *ifsta)
1026{
Joe Perches0795af52007-10-03 17:59:30 -07001027 DECLARE_MAC_BUF(mac);
1028
Jiri Bencf0706e82007-05-05 11:45:53 -07001029 ifsta->assoc_tries++;
1030 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
Joe Perches0795af52007-10-03 17:59:30 -07001031 printk(KERN_DEBUG "%s: association with AP %s"
Jiri Bencf0706e82007-05-05 11:45:53 -07001032 " timed out\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001033 sdata->dev->name, print_mac(mac, ifsta->bssid));
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001034 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001035 return;
1036 }
1037
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001038 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
Joe Perches0795af52007-10-03 17:59:30 -07001039 printk(KERN_DEBUG "%s: associate with AP %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001040 sdata->dev->name, print_mac(mac, ifsta->bssid));
1041 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001042 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001043 "mixed-cell disabled - abort association\n", sdata->dev->name);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001044 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001045 return;
1046 }
1047
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001048 ieee80211_send_assoc(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001049
1050 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1051}
1052
1053
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001054static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001055 struct ieee80211_if_sta *ifsta)
1056{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001057 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001058 struct sta_info *sta;
1059 int disassoc;
Joe Perches0795af52007-10-03 17:59:30 -07001060 DECLARE_MAC_BUF(mac);
Jiri Bencf0706e82007-05-05 11:45:53 -07001061
1062 /* TODO: start monitoring current AP signal quality and number of
1063 * missed beacons. Scan other channels every now and then and search
1064 * for better APs. */
1065 /* TODO: remove expired BSSes */
1066
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001067 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001068
Johannes Bergd0709a62008-02-25 16:27:46 +01001069 rcu_read_lock();
1070
Jiri Bencf0706e82007-05-05 11:45:53 -07001071 sta = sta_info_get(local, ifsta->bssid);
1072 if (!sta) {
Joe Perches0795af52007-10-03 17:59:30 -07001073 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001074 sdata->dev->name, print_mac(mac, ifsta->bssid));
Jiri Bencf0706e82007-05-05 11:45:53 -07001075 disassoc = 1;
1076 } else {
1077 disassoc = 0;
1078 if (time_after(jiffies,
1079 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001080 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001081 printk(KERN_DEBUG "%s: No ProbeResp from "
Joe Perches0795af52007-10-03 17:59:30 -07001082 "current AP %s - assume out of "
Jiri Bencf0706e82007-05-05 11:45:53 -07001083 "range\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001084 sdata->dev->name, print_mac(mac, ifsta->bssid));
Jiri Bencf0706e82007-05-05 11:45:53 -07001085 disassoc = 1;
Johannes Bergd0709a62008-02-25 16:27:46 +01001086 sta_info_unlink(&sta);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001087 } else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001088 ieee80211_send_probe_req(sdata, ifsta->bssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07001089 local->scan_ssid,
1090 local->scan_ssid_len);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001091 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001092 } else {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001093 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001094 if (time_after(jiffies, ifsta->last_probe +
1095 IEEE80211_PROBE_INTERVAL)) {
1096 ifsta->last_probe = jiffies;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001097 ieee80211_send_probe_req(sdata, ifsta->bssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07001098 ifsta->ssid,
1099 ifsta->ssid_len);
1100 }
1101 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001102 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001103
1104 rcu_read_unlock();
1105
Johannes Berg3b967662008-04-08 17:56:52 +02001106 if (disassoc && sta)
Johannes Bergd0709a62008-02-25 16:27:46 +01001107 sta_info_destroy(sta);
Johannes Bergd0709a62008-02-25 16:27:46 +01001108
Jiri Bencf0706e82007-05-05 11:45:53 -07001109 if (disassoc) {
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001110 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001111 ieee80211_set_associated(sdata, ifsta, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07001112 } else {
1113 mod_timer(&ifsta->timer, jiffies +
1114 IEEE80211_MONITORING_INTERVAL);
1115 }
1116}
1117
1118
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001119static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
Jiri Bencf0706e82007-05-05 11:45:53 -07001120 u8 *ssid, size_t ssid_len)
1121{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001122 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001123 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07001124 struct sk_buff *skb;
1125 struct ieee80211_mgmt *mgmt;
1126 u8 *pos, *supp_rates, *esupp_rates = NULL;
1127 int i;
1128
1129 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1130 if (!skb) {
1131 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001132 "request\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001133 return;
1134 }
1135 skb_reserve(skb, local->hw.extra_tx_headroom);
1136
1137 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1138 memset(mgmt, 0, 24);
Harvey Harrisone7827a72008-07-15 18:44:13 -07001139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1140 IEEE80211_STYPE_PROBE_REQ);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001141 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Jiri Bencf0706e82007-05-05 11:45:53 -07001142 if (dst) {
1143 memcpy(mgmt->da, dst, ETH_ALEN);
1144 memcpy(mgmt->bssid, dst, ETH_ALEN);
1145 } else {
1146 memset(mgmt->da, 0xff, ETH_ALEN);
1147 memset(mgmt->bssid, 0xff, ETH_ALEN);
1148 }
1149 pos = skb_put(skb, 2 + ssid_len);
1150 *pos++ = WLAN_EID_SSID;
1151 *pos++ = ssid_len;
1152 memcpy(pos, ssid, ssid_len);
1153
1154 supp_rates = skb_put(skb, 2);
1155 supp_rates[0] = WLAN_EID_SUPP_RATES;
1156 supp_rates[1] = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001157 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1158
1159 for (i = 0; i < sband->n_bitrates; i++) {
1160 struct ieee80211_rate *rate = &sband->bitrates[i];
Jiri Bencf0706e82007-05-05 11:45:53 -07001161 if (esupp_rates) {
1162 pos = skb_put(skb, 1);
1163 esupp_rates[1]++;
1164 } else if (supp_rates[1] == 8) {
1165 esupp_rates = skb_put(skb, 3);
1166 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1167 esupp_rates[1] = 1;
1168 pos = &esupp_rates[2];
1169 } else {
1170 pos = skb_put(skb, 1);
1171 supp_rates[1]++;
1172 }
Johannes Berg8318d782008-01-24 19:38:38 +01001173 *pos = rate->bitrate / 5;
Jiri Bencf0706e82007-05-05 11:45:53 -07001174 }
1175
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001176 ieee80211_sta_tx(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07001177}
1178
1179
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001180static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07001181{
Jiri Bencf0706e82007-05-05 11:45:53 -07001182 if (!sdata || !sdata->default_key ||
Johannes Berg8f20fc22007-08-28 17:01:54 -04001183 sdata->default_key->conf.alg != ALG_WEP)
Jiri Bencf0706e82007-05-05 11:45:53 -07001184 return 0;
1185 return 1;
1186}
1187
1188
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001189static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001190 struct ieee80211_if_sta *ifsta)
1191{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001192 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001193 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001194 ieee80211_associate(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001195}
1196
1197
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001198static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001199 struct ieee80211_if_sta *ifsta,
1200 struct ieee80211_mgmt *mgmt,
1201 size_t len)
1202{
1203 u8 *pos;
1204 struct ieee802_11_elems elems;
1205
Jiri Bencf0706e82007-05-05 11:45:53 -07001206 pos = mgmt->u.auth.variable;
John W. Linville67a4cce2007-10-12 16:40:37 -04001207 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001208 if (!elems.challenge)
Jiri Bencf0706e82007-05-05 11:45:53 -07001209 return;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001210 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
Jiri Bencf0706e82007-05-05 11:45:53 -07001211 elems.challenge_len + 2, 1);
1212}
1213
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001214static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001215 u8 dialog_token, u16 status, u16 policy,
1216 u16 buf_size, u16 timeout)
1217{
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001218 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001219 struct ieee80211_local *local = sdata->local;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001220 struct sk_buff *skb;
1221 struct ieee80211_mgmt *mgmt;
1222 u16 capab;
1223
Ester Kummer3acea5b2008-04-17 16:05:14 -07001224 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1225
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001226 if (!skb) {
1227 printk(KERN_DEBUG "%s: failed to allocate buffer "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001228 "for addba resp frame\n", sdata->dev->name);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001229 return;
1230 }
1231
1232 skb_reserve(skb, local->hw.extra_tx_headroom);
1233 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1234 memset(mgmt, 0, 24);
1235 memcpy(mgmt->da, da, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001236 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Johannes Berg51fb61e2007-12-19 01:31:27 +01001237 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001238 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001239 else
1240 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
Harvey Harrisone7827a72008-07-15 18:44:13 -07001241 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1242 IEEE80211_STYPE_ACTION);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001243
1244 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1245 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1246 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1247 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1248
1249 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1250 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1251 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1252
1253 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1254 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1255 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1256
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001257 ieee80211_sta_tx(sdata, skb, 0);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001258
1259 return;
1260}
1261
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001262void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001263 u16 tid, u8 dialog_token, u16 start_seq_num,
1264 u16 agg_size, u16 timeout)
1265{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001266 struct ieee80211_local *local = sdata->local;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001267 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1268 struct sk_buff *skb;
1269 struct ieee80211_mgmt *mgmt;
1270 u16 capab;
1271
Ester Kummer3acea5b2008-04-17 16:05:14 -07001272 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001273
1274 if (!skb) {
1275 printk(KERN_ERR "%s: failed to allocate buffer "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001276 "for addba request frame\n", sdata->dev->name);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001277 return;
1278 }
1279 skb_reserve(skb, local->hw.extra_tx_headroom);
1280 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1281 memset(mgmt, 0, 24);
1282 memcpy(mgmt->da, da, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001283 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001284 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001285 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001286 else
1287 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1288
Harvey Harrisone7827a72008-07-15 18:44:13 -07001289 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1290 IEEE80211_STYPE_ACTION);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001291
1292 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1293
1294 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1295 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1296
1297 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1298 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1299 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1300 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1301
1302 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1303
1304 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1305 mgmt->u.action.u.addba_req.start_seq_num =
1306 cpu_to_le16(start_seq_num << 4);
1307
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001308 ieee80211_sta_tx(sdata, skb, 0);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001309}
1310
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001311static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001312 struct ieee80211_mgmt *mgmt,
1313 size_t len)
1314{
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001315 struct ieee80211_hw *hw = &local->hw;
1316 struct ieee80211_conf *conf = &hw->conf;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001317 struct sta_info *sta;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001318 struct tid_ampdu_rx *tid_agg_rx;
1319 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001320 u8 dialog_token;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001321 int ret = -EOPNOTSUPP;
1322 DECLARE_MAC_BUF(mac);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001323
Johannes Bergd0709a62008-02-25 16:27:46 +01001324 rcu_read_lock();
1325
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001326 sta = sta_info_get(local, mgmt->sa);
Johannes Bergd0709a62008-02-25 16:27:46 +01001327 if (!sta) {
1328 rcu_read_unlock();
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001329 return;
Johannes Bergd0709a62008-02-25 16:27:46 +01001330 }
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001331
1332 /* extract session parameters from addba request frame */
1333 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1334 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001335 start_seq_num =
1336 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001337
1338 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1339 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1340 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1341 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1342
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001343 status = WLAN_STATUS_REQUEST_DECLINED;
1344
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001345 /* sanity check for incoming parameters:
1346 * check if configuration can support the BA policy
1347 * and if buffer size does not exceeds max value */
1348 if (((ba_policy != 1)
1349 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1350 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1351 status = WLAN_STATUS_INVALID_QOS_PARAM;
1352#ifdef CONFIG_MAC80211_HT_DEBUG
1353 if (net_ratelimit())
Ron Rindjunsky7b9d44c2008-03-18 15:00:31 -07001354 printk(KERN_DEBUG "AddBA Req with bad params from "
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001355 "%s on tid %u. policy %d, buffer size %d\n",
1356 print_mac(mac, mgmt->sa), tid, ba_policy,
1357 buf_size);
1358#endif /* CONFIG_MAC80211_HT_DEBUG */
1359 goto end_no_lock;
1360 }
1361 /* determine default buffer size */
1362 if (buf_size == 0) {
Johannes Berg8318d782008-01-24 19:38:38 +01001363 struct ieee80211_supported_band *sband;
1364
1365 sband = local->hw.wiphy->bands[conf->channel->band];
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001366 buf_size = IEEE80211_MIN_AMPDU_BUF;
Johannes Berg8318d782008-01-24 19:38:38 +01001367 buf_size = buf_size << sband->ht_info.ampdu_factor;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001368 }
1369
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001370
1371 /* examine state machine */
Johannes Berg07346f812008-05-03 01:02:02 +02001372 spin_lock_bh(&sta->lock);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001373
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001374 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001375#ifdef CONFIG_MAC80211_HT_DEBUG
1376 if (net_ratelimit())
Ron Rindjunsky7b9d44c2008-03-18 15:00:31 -07001377 printk(KERN_DEBUG "unexpected AddBA Req from "
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001378 "%s on tid %u\n",
1379 print_mac(mac, mgmt->sa), tid);
1380#endif /* CONFIG_MAC80211_HT_DEBUG */
1381 goto end;
1382 }
1383
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001384 /* prepare A-MPDU MLME for Rx aggregation */
1385 sta->ampdu_mlme.tid_rx[tid] =
1386 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1387 if (!sta->ampdu_mlme.tid_rx[tid]) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001388#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001389 if (net_ratelimit())
1390 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1391 tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001392#endif
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001393 goto end;
1394 }
1395 /* rx timer */
1396 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1397 sta_rx_agg_session_timer_expired;
1398 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1399 (unsigned long)&sta->timer_to_tid[tid];
1400 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1401
1402 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1403
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001404 /* prepare reordering buffer */
1405 tid_agg_rx->reorder_buf =
Senthil Balasubramanianc97c23e2008-05-28 23:15:32 +05301406 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
Johannes Berg03147df2008-02-26 00:39:28 +01001407 if (!tid_agg_rx->reorder_buf) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001408#ifdef CONFIG_MAC80211_HT_DEBUG
Johannes Berg03147df2008-02-26 00:39:28 +01001409 if (net_ratelimit())
1410 printk(KERN_ERR "can not allocate reordering buffer "
1411 "to tid %d\n", tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001412#endif
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001413 kfree(sta->ampdu_mlme.tid_rx[tid]);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001414 goto end;
1415 }
1416 memset(tid_agg_rx->reorder_buf, 0,
Senthil Balasubramanianc97c23e2008-05-28 23:15:32 +05301417 buf_size * sizeof(struct sk_buff *));
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001418
1419 if (local->ops->ampdu_action)
1420 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
Ron Rindjunsky0df3ef42008-01-28 14:07:15 +02001421 sta->addr, tid, &start_seq_num);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001422#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunsky513a1022008-04-07 10:16:56 -07001423 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001424#endif /* CONFIG_MAC80211_HT_DEBUG */
1425
1426 if (ret) {
1427 kfree(tid_agg_rx->reorder_buf);
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001428 kfree(tid_agg_rx);
1429 sta->ampdu_mlme.tid_rx[tid] = NULL;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001430 goto end;
1431 }
1432
1433 /* change state and send addba resp */
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001434 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001435 tid_agg_rx->dialog_token = dialog_token;
1436 tid_agg_rx->ssn = start_seq_num;
1437 tid_agg_rx->head_seq_num = start_seq_num;
1438 tid_agg_rx->buf_size = buf_size;
1439 tid_agg_rx->timeout = timeout;
1440 tid_agg_rx->stored_mpdu_num = 0;
1441 status = WLAN_STATUS_SUCCESS;
1442end:
Johannes Berg07346f812008-05-03 01:02:02 +02001443 spin_unlock_bh(&sta->lock);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001444
1445end_no_lock:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001446 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
Johannes Bergd0709a62008-02-25 16:27:46 +01001447 dialog_token, status, 1, buf_size, timeout);
1448 rcu_read_unlock();
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02001449}
Jiri Bencf0706e82007-05-05 11:45:53 -07001450
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001451static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001452 struct ieee80211_mgmt *mgmt,
1453 size_t len)
1454{
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001455 struct ieee80211_hw *hw = &local->hw;
1456 struct sta_info *sta;
1457 u16 capab;
1458 u16 tid;
1459 u8 *state;
1460
Johannes Bergd0709a62008-02-25 16:27:46 +01001461 rcu_read_lock();
1462
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001463 sta = sta_info_get(local, mgmt->sa);
Johannes Bergd0709a62008-02-25 16:27:46 +01001464 if (!sta) {
1465 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001466 return;
Johannes Bergd0709a62008-02-25 16:27:46 +01001467 }
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001468
1469 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1470 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1471
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001472 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001473
Johannes Berg07346f812008-05-03 01:02:02 +02001474 spin_lock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001475
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001476 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
Johannes Berg07346f812008-05-03 01:02:02 +02001477 spin_unlock_bh(&sta->lock);
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001478 goto addba_resp_exit;
1479 }
1480
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001481 if (mgmt->u.action.u.addba_resp.dialog_token !=
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001482 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
Johannes Berg07346f812008-05-03 01:02:02 +02001483 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001484#ifdef CONFIG_MAC80211_HT_DEBUG
1485 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1486#endif /* CONFIG_MAC80211_HT_DEBUG */
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001487 goto addba_resp_exit;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001488 }
1489
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001490 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001491#ifdef CONFIG_MAC80211_HT_DEBUG
1492 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1493#endif /* CONFIG_MAC80211_HT_DEBUG */
1494 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1495 == WLAN_STATUS_SUCCESS) {
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001496 *state |= HT_ADDBA_RECEIVED_MSK;
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001497 sta->ampdu_mlme.addba_req_num[tid] = 0;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001498
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001499 if (*state == HT_AGG_STATE_OPERATIONAL)
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001500 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001501
Johannes Berg07346f812008-05-03 01:02:02 +02001502 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001503 } else {
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001504 sta->ampdu_mlme.addba_req_num[tid]++;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001505 /* this will allow the state check in stop_BA_session */
1506 *state = HT_AGG_STATE_OPERATIONAL;
Johannes Berg07346f812008-05-03 01:02:02 +02001507 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001508 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1509 WLAN_BACK_INITIATOR);
1510 }
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001511
1512addba_resp_exit:
Johannes Bergd0709a62008-02-25 16:27:46 +01001513 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001514}
1515
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001516void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001517 u16 initiator, u16 reason_code)
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001518{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001519 struct ieee80211_local *local = sdata->local;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001520 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1521 struct sk_buff *skb;
1522 struct ieee80211_mgmt *mgmt;
1523 u16 params;
1524
Ester Kummer3acea5b2008-04-17 16:05:14 -07001525 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001526
1527 if (!skb) {
1528 printk(KERN_ERR "%s: failed to allocate buffer "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001529 "for delba frame\n", sdata->dev->name);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001530 return;
1531 }
1532
1533 skb_reserve(skb, local->hw.extra_tx_headroom);
1534 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1535 memset(mgmt, 0, 24);
1536 memcpy(mgmt->da, da, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001537 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Johannes Berg51fb61e2007-12-19 01:31:27 +01001538 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001539 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001540 else
1541 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
Harvey Harrisone7827a72008-07-15 18:44:13 -07001542 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1543 IEEE80211_STYPE_ACTION);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001544
1545 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1546
1547 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1548 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1549 params = (u16)(initiator << 11); /* bit 11 initiator */
1550 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1551
1552 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1553 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1554
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001555 ieee80211_sta_tx(sdata, skb, 0);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001556}
1557
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001558void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001559{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001560 struct ieee80211_local *local = sdata->local;
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001561 struct sk_buff *skb;
1562 struct ieee80211_bar *bar;
1563 u16 bar_control = 0;
1564
1565 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1566 if (!skb) {
1567 printk(KERN_ERR "%s: failed to allocate buffer for "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001568 "bar frame\n", sdata->dev->name);
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001569 return;
1570 }
1571 skb_reserve(skb, local->hw.extra_tx_headroom);
1572 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1573 memset(bar, 0, sizeof(*bar));
Harvey Harrisone7827a72008-07-15 18:44:13 -07001574 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1575 IEEE80211_STYPE_BACK_REQ);
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001576 memcpy(bar->ra, ra, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001577 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001578 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1579 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1580 bar_control |= (u16)(tid << 12);
1581 bar->control = cpu_to_le16(bar_control);
1582 bar->start_seq_num = cpu_to_le16(ssn);
1583
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001584 ieee80211_sta_tx(sdata, skb, 0);
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001585}
1586
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001587void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001588 u16 initiator, u16 reason)
1589{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001590 struct ieee80211_local *local = sdata->local;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001591 struct ieee80211_hw *hw = &local->hw;
1592 struct sta_info *sta;
Ron Rindjunskyb5807812007-12-25 17:00:35 +02001593 int ret, i;
Ron Rindjunsky513a1022008-04-07 10:16:56 -07001594 DECLARE_MAC_BUF(mac);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001595
Johannes Bergd0709a62008-02-25 16:27:46 +01001596 rcu_read_lock();
1597
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001598 sta = sta_info_get(local, ra);
Johannes Bergd0709a62008-02-25 16:27:46 +01001599 if (!sta) {
1600 rcu_read_unlock();
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001601 return;
Johannes Bergd0709a62008-02-25 16:27:46 +01001602 }
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001603
1604 /* check if TID is in operational state */
Johannes Berg07346f812008-05-03 01:02:02 +02001605 spin_lock_bh(&sta->lock);
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001606 if (sta->ampdu_mlme.tid_state_rx[tid]
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001607 != HT_AGG_STATE_OPERATIONAL) {
Johannes Berg07346f812008-05-03 01:02:02 +02001608 spin_unlock_bh(&sta->lock);
Johannes Bergd0709a62008-02-25 16:27:46 +01001609 rcu_read_unlock();
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001610 return;
1611 }
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001612 sta->ampdu_mlme.tid_state_rx[tid] =
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001613 HT_AGG_STATE_REQ_STOP_BA_MSK |
1614 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
Johannes Berg07346f812008-05-03 01:02:02 +02001615 spin_unlock_bh(&sta->lock);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001616
1617 /* stop HW Rx aggregation. ampdu_action existence
1618 * already verified in session init so we add the BUG_ON */
1619 BUG_ON(!local->ops->ampdu_action);
1620
Ron Rindjunsky513a1022008-04-07 10:16:56 -07001621#ifdef CONFIG_MAC80211_HT_DEBUG
1622 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1623 print_mac(mac, ra), tid);
1624#endif /* CONFIG_MAC80211_HT_DEBUG */
1625
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001626 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
Ron Rindjunsky0df3ef42008-01-28 14:07:15 +02001627 ra, tid, NULL);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001628 if (ret)
1629 printk(KERN_DEBUG "HW problem - can not stop rx "
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001630 "aggregation for tid %d\n", tid);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001631
1632 /* shutdown timer has not expired */
1633 if (initiator != WLAN_BACK_TIMER)
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001634 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001635
1636 /* check if this is a self generated aggregation halt */
1637 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001638 ieee80211_send_delba(sdata, ra, tid, 0, reason);
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001639
1640 /* free the reordering buffer */
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001641 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1642 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
Ron Rindjunskyb5807812007-12-25 17:00:35 +02001643 /* release the reordered frames */
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001644 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1645 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1646 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
Ron Rindjunskyb5807812007-12-25 17:00:35 +02001647 }
1648 }
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001649 /* free resources */
1650 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1651 kfree(sta->ampdu_mlme.tid_rx[tid]);
1652 sta->ampdu_mlme.tid_rx[tid] = NULL;
1653 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001654
Johannes Bergd0709a62008-02-25 16:27:46 +01001655 rcu_read_unlock();
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001656}
1657
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001658
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001659static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001660 struct ieee80211_mgmt *mgmt, size_t len)
1661{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001662 struct ieee80211_local *local = sdata->local;
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001663 struct sta_info *sta;
1664 u16 tid, params;
1665 u16 initiator;
1666 DECLARE_MAC_BUF(mac);
1667
Johannes Bergd0709a62008-02-25 16:27:46 +01001668 rcu_read_lock();
1669
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001670 sta = sta_info_get(local, mgmt->sa);
Johannes Bergd0709a62008-02-25 16:27:46 +01001671 if (!sta) {
1672 rcu_read_unlock();
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001673 return;
Johannes Bergd0709a62008-02-25 16:27:46 +01001674 }
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001675
1676 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1677 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1678 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1679
1680#ifdef CONFIG_MAC80211_HT_DEBUG
1681 if (net_ratelimit())
Ron Rindjunskyd92684e2008-01-28 14:07:22 +02001682 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1683 print_mac(mac, mgmt->sa),
Ron Rindjunsky2e354ed2008-03-18 15:00:30 -07001684 initiator ? "initiator" : "recipient", tid,
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001685 mgmt->u.action.u.delba.reason_code);
1686#endif /* CONFIG_MAC80211_HT_DEBUG */
1687
1688 if (initiator == WLAN_BACK_INITIATOR)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001689 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001690 WLAN_BACK_INITIATOR, 0);
Ron Rindjunskyd92684e2008-01-28 14:07:22 +02001691 else { /* WLAN_BACK_RECIPIENT */
Johannes Berg07346f812008-05-03 01:02:02 +02001692 spin_lock_bh(&sta->lock);
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001693 sta->ampdu_mlme.tid_state_tx[tid] =
Ron Rindjunskyd92684e2008-01-28 14:07:22 +02001694 HT_AGG_STATE_OPERATIONAL;
Johannes Berg07346f812008-05-03 01:02:02 +02001695 spin_unlock_bh(&sta->lock);
Ron Rindjunskyd92684e2008-01-28 14:07:22 +02001696 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1697 WLAN_BACK_RECIPIENT);
1698 }
Johannes Bergd0709a62008-02-25 16:27:46 +01001699 rcu_read_unlock();
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02001700}
1701
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001702/*
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001703 * After sending add Block Ack request we activated a timer until
1704 * add Block Ack response will arrive from the recipient.
1705 * If this timer expires sta_addba_resp_timer_expired will be executed.
1706 */
1707void sta_addba_resp_timer_expired(unsigned long data)
1708{
1709 /* not an elegant detour, but there is no choice as the timer passes
1710 * only one argument, and both sta_info and TID are needed, so init
Johannes Berg73651ee2008-02-25 16:27:47 +01001711 * flow in sta_info_create gives the TID as data, while the timer_to_id
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001712 * array gives the sta through container_of */
Senthil Balasubramanian70d251b2008-05-28 20:08:12 +05301713 u16 tid = *(u8 *)data;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001714 struct sta_info *temp_sta = container_of((void *)data,
1715 struct sta_info, timer_to_tid[tid]);
1716
1717 struct ieee80211_local *local = temp_sta->local;
1718 struct ieee80211_hw *hw = &local->hw;
1719 struct sta_info *sta;
1720 u8 *state;
1721
Johannes Bergd0709a62008-02-25 16:27:46 +01001722 rcu_read_lock();
1723
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001724 sta = sta_info_get(local, temp_sta->addr);
Johannes Bergd0709a62008-02-25 16:27:46 +01001725 if (!sta) {
1726 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001727 return;
Johannes Bergd0709a62008-02-25 16:27:46 +01001728 }
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001729
Ron Rindjunskycee24a32008-03-26 20:36:03 +02001730 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001731 /* check if the TID waits for addBA response */
Johannes Berg07346f812008-05-03 01:02:02 +02001732 spin_lock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001733 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
Johannes Berg07346f812008-05-03 01:02:02 +02001734 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001735 *state = HT_AGG_STATE_IDLE;
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001736#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001737 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1738 "expecting addBA response there", tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001739#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001740 goto timer_expired_exit;
1741 }
1742
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001743#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001744 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001745#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001746
1747 /* go through the state check in stop_BA_session */
1748 *state = HT_AGG_STATE_OPERATIONAL;
Johannes Berg07346f812008-05-03 01:02:02 +02001749 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001750 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1751 WLAN_BACK_INITIATOR);
1752
1753timer_expired_exit:
Johannes Bergd0709a62008-02-25 16:27:46 +01001754 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001755}
1756
1757/*
Ron Rindjunsky7b9d44c2008-03-18 15:00:31 -07001758 * After accepting the AddBA Request we activated a timer,
1759 * resetting it after each frame that arrives from the originator.
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001760 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1761 */
Adrian Bunk712590d2008-04-21 11:47:51 +03001762static void sta_rx_agg_session_timer_expired(unsigned long data)
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001763{
1764 /* not an elegant detour, but there is no choice as the timer passes
Senthil Balasubramanian70d251b2008-05-28 20:08:12 +05301765 * only one argument, and various sta_info are needed here, so init
Johannes Berg73651ee2008-02-25 16:27:47 +01001766 * flow in sta_info_create gives the TID as data, while the timer_to_id
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001767 * array gives the sta through container_of */
1768 u8 *ptid = (u8 *)data;
1769 u8 *timer_to_id = ptid - *ptid;
1770 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1771 timer_to_tid[0]);
1772
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001773#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001774 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001775#endif
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001776 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
Johannes Bergd0709a62008-02-25 16:27:46 +01001777 (u16)*ptid, WLAN_BACK_TIMER,
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001778 WLAN_REASON_QSTA_TIMEOUT);
1779}
1780
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001781void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
Ron Rindjunsky85249e52008-03-18 15:00:32 -07001782{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001783 struct ieee80211_local *local = sdata->local;
Ron Rindjunsky85249e52008-03-18 15:00:32 -07001784 int i;
1785
1786 for (i = 0; i < STA_TID_NUM; i++) {
1787 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1788 WLAN_BACK_INITIATOR);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001789 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
Ron Rindjunsky85249e52008-03-18 15:00:32 -07001790 WLAN_BACK_RECIPIENT,
1791 WLAN_REASON_QSTA_LEAVE_QBSS);
1792 }
1793}
Ron Rindjunsky07db2182007-12-25 17:00:33 +02001794
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001795static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
Assaf Kraussb6623482008-06-16 16:09:49 +03001796 struct ieee80211_msrment_ie *request_ie,
1797 const u8 *da, const u8 *bssid,
1798 u8 dialog_token)
1799{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001800 struct ieee80211_local *local = sdata->local;
Assaf Kraussb6623482008-06-16 16:09:49 +03001801 struct sk_buff *skb;
1802 struct ieee80211_mgmt *msr_report;
1803
1804 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1805 sizeof(struct ieee80211_msrment_ie));
1806
1807 if (!skb) {
1808 printk(KERN_ERR "%s: failed to allocate buffer for "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001809 "measurement report frame\n", sdata->dev->name);
Assaf Kraussb6623482008-06-16 16:09:49 +03001810 return;
1811 }
1812
1813 skb_reserve(skb, local->hw.extra_tx_headroom);
1814 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1815 memset(msr_report, 0, 24);
1816 memcpy(msr_report->da, da, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001817 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
Assaf Kraussb6623482008-06-16 16:09:49 +03001818 memcpy(msr_report->bssid, bssid, ETH_ALEN);
Harvey Harrisone7827a72008-07-15 18:44:13 -07001819 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
Assaf Kraussb6623482008-06-16 16:09:49 +03001820 IEEE80211_STYPE_ACTION);
1821
1822 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1823 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1824 msr_report->u.action.u.measurement.action_code =
1825 WLAN_ACTION_SPCT_MSR_RPRT;
1826 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1827
1828 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1829 msr_report->u.action.u.measurement.length =
1830 sizeof(struct ieee80211_msrment_ie);
1831
1832 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1833 sizeof(struct ieee80211_msrment_ie));
1834 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1835 msr_report->u.action.u.measurement.msr_elem.mode |=
1836 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1837 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1838
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001839 ieee80211_sta_tx(sdata, skb, 0);
Assaf Kraussb6623482008-06-16 16:09:49 +03001840}
1841
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001842static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
Assaf Kraussb6623482008-06-16 16:09:49 +03001843 struct ieee80211_mgmt *mgmt,
1844 size_t len)
1845{
1846 /*
1847 * Ignoring measurement request is spec violation.
1848 * Mandatory measurements must be reported optional
1849 * measurements might be refused or reported incapable
1850 * For now just refuse
1851 * TODO: Answer basic measurement as unmeasured
1852 */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001853 ieee80211_send_refuse_measurement_request(sdata,
Assaf Kraussb6623482008-06-16 16:09:49 +03001854 &mgmt->u.action.u.measurement.msr_elem,
1855 mgmt->sa, mgmt->bssid,
1856 mgmt->u.action.u.measurement.dialog_token);
1857}
1858
1859
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001860static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001861 struct ieee80211_if_sta *ifsta,
1862 struct ieee80211_mgmt *mgmt,
1863 size_t len)
1864{
Jiri Bencf0706e82007-05-05 11:45:53 -07001865 u16 auth_alg, auth_transaction, status_code;
Joe Perches0795af52007-10-03 17:59:30 -07001866 DECLARE_MAC_BUF(mac);
Jiri Bencf0706e82007-05-05 11:45:53 -07001867
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001868 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001869 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
Jiri Bencf0706e82007-05-05 11:45:53 -07001870 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001871
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001872 if (len < 24 + 6)
Jiri Bencf0706e82007-05-05 11:45:53 -07001873 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001874
Johannes Berg51fb61e2007-12-19 01:31:27 +01001875 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001876 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001877 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001878
Johannes Berg51fb61e2007-12-19 01:31:27 +01001879 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001880 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001881 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001882
1883 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1884 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1885 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1886
Johannes Berg51fb61e2007-12-19 01:31:27 +01001887 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
Johannes Berg135a2112008-06-16 20:55:29 +02001888 /*
1889 * IEEE 802.11 standard does not require authentication in IBSS
Jiri Bencf0706e82007-05-05 11:45:53 -07001890 * networks and most implementations do not seem to use it.
1891 * However, try to reply to authentication attempts if someone
1892 * has actually implemented this.
Johannes Berg135a2112008-06-16 20:55:29 +02001893 */
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001894 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
Jiri Bencf0706e82007-05-05 11:45:53 -07001895 return;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001896 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07001897 }
1898
1899 if (auth_alg != ifsta->auth_alg ||
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001900 auth_transaction != ifsta->auth_transaction)
Jiri Bencf0706e82007-05-05 11:45:53 -07001901 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001902
1903 if (status_code != WLAN_STATUS_SUCCESS) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001904 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1905 u8 algs[3];
1906 const int num_algs = ARRAY_SIZE(algs);
1907 int i, pos;
1908 algs[0] = algs[1] = algs[2] = 0xff;
1909 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1910 algs[0] = WLAN_AUTH_OPEN;
1911 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1912 algs[1] = WLAN_AUTH_SHARED_KEY;
1913 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1914 algs[2] = WLAN_AUTH_LEAP;
1915 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1916 pos = 0;
1917 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1918 pos = 1;
1919 else
1920 pos = 2;
1921 for (i = 0; i < num_algs; i++) {
1922 pos++;
1923 if (pos >= num_algs)
1924 pos = 0;
1925 if (algs[pos] == ifsta->auth_alg ||
1926 algs[pos] == 0xff)
1927 continue;
1928 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001929 !ieee80211_sta_wep_configured(sdata))
Jiri Bencf0706e82007-05-05 11:45:53 -07001930 continue;
1931 ifsta->auth_alg = algs[pos];
Jiri Bencf0706e82007-05-05 11:45:53 -07001932 break;
1933 }
1934 }
1935 return;
1936 }
1937
1938 switch (ifsta->auth_alg) {
1939 case WLAN_AUTH_OPEN:
1940 case WLAN_AUTH_LEAP:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001941 ieee80211_auth_completed(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001942 break;
1943 case WLAN_AUTH_SHARED_KEY:
1944 if (ifsta->auth_transaction == 4)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001945 ieee80211_auth_completed(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001946 else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001947 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001948 break;
1949 }
1950}
1951
1952
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001953static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001954 struct ieee80211_if_sta *ifsta,
1955 struct ieee80211_mgmt *mgmt,
1956 size_t len)
1957{
1958 u16 reason_code;
Joe Perches0795af52007-10-03 17:59:30 -07001959 DECLARE_MAC_BUF(mac);
Jiri Bencf0706e82007-05-05 11:45:53 -07001960
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001961 if (len < 24 + 2)
Jiri Bencf0706e82007-05-05 11:45:53 -07001962 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001963
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001964 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
Jiri Bencf0706e82007-05-05 11:45:53 -07001965 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001966
1967 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1968
Johannes Berg988c0f72008-04-17 19:21:22 +02001969 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001970 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001971
Tomas Winkler48c2fc52008-08-06 14:22:01 +03001972 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1973 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1974 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001975 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001976 mod_timer(&ifsta->timer, jiffies +
1977 IEEE80211_RETRY_AUTH_INTERVAL);
1978 }
1979
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001980 ieee80211_set_disassoc(sdata, ifsta, 1);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001981 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001982}
1983
1984
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001985static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001986 struct ieee80211_if_sta *ifsta,
1987 struct ieee80211_mgmt *mgmt,
1988 size_t len)
1989{
1990 u16 reason_code;
Joe Perches0795af52007-10-03 17:59:30 -07001991 DECLARE_MAC_BUF(mac);
Jiri Bencf0706e82007-05-05 11:45:53 -07001992
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001993 if (len < 24 + 2)
Jiri Bencf0706e82007-05-05 11:45:53 -07001994 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001995
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001996 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
Jiri Bencf0706e82007-05-05 11:45:53 -07001997 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001998
1999 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2000
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002001 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002002 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07002003
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002004 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
2005 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
Jiri Bencf0706e82007-05-05 11:45:53 -07002006 mod_timer(&ifsta->timer, jiffies +
2007 IEEE80211_RETRY_AUTH_INTERVAL);
2008 }
2009
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002010 ieee80211_set_disassoc(sdata, ifsta, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07002011}
2012
2013
Johannes Berg471b3ef2007-12-28 14:32:58 +01002014static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002015 struct ieee80211_if_sta *ifsta,
2016 struct ieee80211_mgmt *mgmt,
2017 size_t len,
2018 int reassoc)
2019{
Johannes Berg471b3ef2007-12-28 14:32:58 +01002020 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01002021 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07002022 struct sta_info *sta;
Johannes Berg8318d782008-01-24 19:38:38 +01002023 u64 rates, basic_rates;
Jiri Bencf0706e82007-05-05 11:45:53 -07002024 u16 capab_info, status_code, aid;
2025 struct ieee802_11_elems elems;
Johannes Berg471b3ef2007-12-28 14:32:58 +01002026 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
Jiri Bencf0706e82007-05-05 11:45:53 -07002027 u8 *pos;
2028 int i, j;
Joe Perches0795af52007-10-03 17:59:30 -07002029 DECLARE_MAC_BUF(mac);
Johannes Berg8318d782008-01-24 19:38:38 +01002030 bool have_higher_than_11mbit = false;
Jiri Bencf0706e82007-05-05 11:45:53 -07002031
2032 /* AssocResp and ReassocResp have identical structure, so process both
2033 * of them in this function. */
2034
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002035 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
Jiri Bencf0706e82007-05-05 11:45:53 -07002036 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002037
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002038 if (len < 24 + 6)
Jiri Bencf0706e82007-05-05 11:45:53 -07002039 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002040
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002041 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07002042 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002043
2044 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2045 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2046 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Jiri Bencf0706e82007-05-05 11:45:53 -07002047
Joe Perches0795af52007-10-03 17:59:30 -07002048 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
Jiri Bencf0706e82007-05-05 11:45:53 -07002049 "status=%d aid=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002050 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
Johannes Bergddd68582007-10-22 14:51:37 +02002051 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
Jiri Bencf0706e82007-05-05 11:45:53 -07002052
2053 if (status_code != WLAN_STATUS_SUCCESS) {
2054 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002055 sdata->dev->name, status_code);
Daniel Drake8a69aa92007-07-27 15:43:23 +02002056 /* if this was a reassociation, ensure we try a "full"
2057 * association next time. This works around some broken APs
2058 * which do not correctly reject reassociation requests. */
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002059 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Jiri Bencf0706e82007-05-05 11:45:53 -07002060 return;
2061 }
2062
Johannes Berg1dd84aa2007-10-10 12:03:41 +02002063 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2064 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002065 "set\n", sdata->dev->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02002066 aid &= ~(BIT(15) | BIT(14));
2067
Jiri Bencf0706e82007-05-05 11:45:53 -07002068 pos = mgmt->u.assoc_resp.variable;
John W. Linville67a4cce2007-10-12 16:40:37 -04002069 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
Jiri Bencf0706e82007-05-05 11:45:53 -07002070
2071 if (!elems.supp_rates) {
2072 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002073 sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07002074 return;
2075 }
2076
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002077 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07002078 ifsta->aid = aid;
2079 ifsta->ap_capab = capab_info;
2080
2081 kfree(ifsta->assocresp_ies);
2082 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
Michael Wu0ec0b7a2007-07-27 15:43:24 +02002083 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07002084 if (ifsta->assocresp_ies)
2085 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2086
Johannes Bergd0709a62008-02-25 16:27:46 +01002087 rcu_read_lock();
2088
Jiri Bencf0706e82007-05-05 11:45:53 -07002089 /* Add STA entry for the AP */
2090 sta = sta_info_get(local, ifsta->bssid);
2091 if (!sta) {
2092 struct ieee80211_sta_bss *bss;
Johannes Berg73651ee2008-02-25 16:27:47 +01002093 int err;
Johannes Bergd0709a62008-02-25 16:27:46 +01002094
Johannes Berg73651ee2008-02-25 16:27:47 +01002095 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2096 if (!sta) {
2097 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002098 " the AP\n", sdata->dev->name);
Johannes Bergd0709a62008-02-25 16:27:46 +01002099 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07002100 return;
2101 }
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002102 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
Johannes Berg8318d782008-01-24 19:38:38 +01002103 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04002104 ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002105 if (bss) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002106 sta->last_signal = bss->signal;
Bruno Randolf566bfe52008-05-08 19:15:40 +02002107 sta->last_qual = bss->qual;
Jiri Bencf0706e82007-05-05 11:45:53 -07002108 sta->last_noise = bss->noise;
Johannes Berg3e122be2008-07-09 14:40:34 +02002109 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002110 }
Johannes Berg73651ee2008-02-25 16:27:47 +01002111
2112 err = sta_info_insert(sta);
2113 if (err) {
2114 printk(KERN_DEBUG "%s: failed to insert STA entry for"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002115 " the AP (error %d)\n", sdata->dev->name, err);
Johannes Berg73651ee2008-02-25 16:27:47 +01002116 rcu_read_unlock();
2117 return;
2118 }
Ron Rindjunskya61dae12008-08-10 00:54:34 +03002119 /* update new sta with its last rx activity */
2120 sta->last_rx = jiffies;
Jiri Bencf0706e82007-05-05 11:45:53 -07002121 }
2122
Johannes Berg73651ee2008-02-25 16:27:47 +01002123 /*
2124 * FIXME: Do we really need to update the sta_info's information here?
2125 * We already know about the AP (we found it in our list) so it
2126 * should already be filled with the right info, no?
2127 * As is stands, all this is racy because typically we assume
2128 * the information that is filled in here (except flags) doesn't
2129 * change while a STA structure is alive. As such, it should move
2130 * to between the sta_info_alloc() and sta_info_insert() above.
2131 */
2132
Johannes Berg07346f812008-05-03 01:02:02 +02002133 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2134 WLAN_STA_AUTHORIZED);
Jiri Bencf0706e82007-05-05 11:45:53 -07002135
2136 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01002137 basic_rates = 0;
2138 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2139
Jiri Bencf0706e82007-05-05 11:45:53 -07002140 for (i = 0; i < elems.supp_rates_len; i++) {
2141 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Johannes Berg8318d782008-01-24 19:38:38 +01002142
2143 if (rate > 110)
2144 have_higher_than_11mbit = true;
2145
2146 for (j = 0; j < sband->n_bitrates; j++) {
2147 if (sband->bitrates[j].bitrate == rate)
Jiri Bencf0706e82007-05-05 11:45:53 -07002148 rates |= BIT(j);
Johannes Berg8318d782008-01-24 19:38:38 +01002149 if (elems.supp_rates[i] & 0x80)
2150 basic_rates |= BIT(j);
2151 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002152 }
Johannes Berg8318d782008-01-24 19:38:38 +01002153
Jiri Bencf0706e82007-05-05 11:45:53 -07002154 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2155 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Johannes Berg8318d782008-01-24 19:38:38 +01002156
2157 if (rate > 110)
2158 have_higher_than_11mbit = true;
2159
2160 for (j = 0; j < sband->n_bitrates; j++) {
2161 if (sband->bitrates[j].bitrate == rate)
Jiri Bencf0706e82007-05-05 11:45:53 -07002162 rates |= BIT(j);
Johannes Berg8318d782008-01-24 19:38:38 +01002163 if (elems.ext_supp_rates[i] & 0x80)
2164 basic_rates |= BIT(j);
2165 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002166 }
Johannes Berg8318d782008-01-24 19:38:38 +01002167
2168 sta->supp_rates[local->hw.conf.channel->band] = rates;
2169 sdata->basic_rates = basic_rates;
2170
2171 /* cf. IEEE 802.11 9.2.12 */
2172 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2173 have_higher_than_11mbit)
2174 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2175 else
2176 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e82007-05-05 11:45:53 -07002177
Johannes Berg3434fbd2008-05-03 00:59:37 +02002178 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2179 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002180 struct ieee80211_ht_bss_info bss_info;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002181 ieee80211_ht_cap_ie_to_ht_info(
2182 (struct ieee80211_ht_cap *)
2183 elems.ht_cap_elem, &sta->ht_info);
2184 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2185 (struct ieee80211_ht_addt_info *)
2186 elems.ht_info_elem, &bss_info);
Tomas Winkler38668c02008-03-28 16:33:32 -07002187 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002188 }
2189
Jiri Bencf0706e82007-05-05 11:45:53 -07002190 rate_control_rate_init(sta, local);
2191
Johannes Berg3434fbd2008-05-03 00:59:37 +02002192 if (elems.wmm_param) {
Johannes Berg07346f812008-05-03 01:02:02 +02002193 set_sta_flags(sta, WLAN_STA_WME);
Johannes Berge5f98f22008-03-05 20:39:31 +01002194 rcu_read_unlock();
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002195 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07002196 elems.wmm_param_len);
Johannes Berge5f98f22008-03-05 20:39:31 +01002197 } else
2198 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07002199
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07002200 /* set AID and assoc capability,
2201 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01002202 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07002203 bss_conf->assoc_capability = capab_info;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002204 ieee80211_set_associated(sdata, ifsta, 1);
Jiri Bencf0706e82007-05-05 11:45:53 -07002205
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002206 ieee80211_associated(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07002207}
2208
2209
2210/* Caller must hold local->sta_bss_lock */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002211static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -07002212 struct ieee80211_sta_bss *bss)
2213{
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002214 u8 hash_idx;
Johannes Berg902acc72008-02-23 15:17:19 +01002215
2216 if (bss_mesh_cfg(bss))
2217 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2218 bss_mesh_id_len(bss));
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002219 else
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002220 hash_idx = STA_HASH(bss->bssid);
Johannes Berg902acc72008-02-23 15:17:19 +01002221
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002222 bss->hnext = local->sta_bss_hash[hash_idx];
2223 local->sta_bss_hash[hash_idx] = bss;
Jiri Bencf0706e82007-05-05 11:45:53 -07002224}
2225
2226
2227/* Caller must hold local->sta_bss_lock */
Johannes Berg3e122be2008-07-09 14:40:34 +02002228static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -07002229 struct ieee80211_sta_bss *bss)
2230{
Jiri Bencf0706e82007-05-05 11:45:53 -07002231 struct ieee80211_sta_bss *b, *prev = NULL;
2232 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2233 while (b) {
2234 if (b == bss) {
2235 if (!prev)
2236 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2237 bss->hnext;
2238 else
2239 prev->hnext = bss->hnext;
2240 break;
2241 }
2242 prev = b;
2243 b = b->hnext;
2244 }
2245}
2246
2247
2248static struct ieee80211_sta_bss *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002249ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04002250 u8 *ssid, u8 ssid_len)
Jiri Bencf0706e82007-05-05 11:45:53 -07002251{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002252 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002253 struct ieee80211_sta_bss *bss;
2254
Yoann Padioleaudd00cc42007-07-19 01:49:03 -07002255 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
Jiri Bencf0706e82007-05-05 11:45:53 -07002256 if (!bss)
2257 return NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07002258 atomic_inc(&bss->users);
2259 atomic_inc(&bss->users);
2260 memcpy(bss->bssid, bssid, ETH_ALEN);
Johannes Berg8318d782008-01-24 19:38:38 +01002261 bss->freq = freq;
John W. Linvillecffdd302007-10-05 14:23:27 -04002262 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2263 memcpy(bss->ssid, ssid, ssid_len);
2264 bss->ssid_len = ssid_len;
2265 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002266
2267 spin_lock_bh(&local->sta_bss_lock);
2268 /* TODO: order by RSSI? */
2269 list_add_tail(&bss->list, &local->sta_bss_list);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002270 __ieee80211_rx_bss_hash_add(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002271 spin_unlock_bh(&local->sta_bss_lock);
2272 return bss;
2273}
2274
Jiri Bencf0706e82007-05-05 11:45:53 -07002275static struct ieee80211_sta_bss *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002276ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04002277 u8 *ssid, u8 ssid_len)
Jiri Bencf0706e82007-05-05 11:45:53 -07002278{
Jiri Bencf0706e82007-05-05 11:45:53 -07002279 struct ieee80211_sta_bss *bss;
2280
2281 spin_lock_bh(&local->sta_bss_lock);
2282 bss = local->sta_bss_hash[STA_HASH(bssid)];
2283 while (bss) {
Johannes Berg902acc72008-02-23 15:17:19 +01002284 if (!bss_mesh_cfg(bss) &&
2285 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
Johannes Berg8318d782008-01-24 19:38:38 +01002286 bss->freq == freq &&
John W. Linvillecffdd302007-10-05 14:23:27 -04002287 bss->ssid_len == ssid_len &&
2288 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002289 atomic_inc(&bss->users);
2290 break;
2291 }
2292 bss = bss->hnext;
2293 }
2294 spin_unlock_bh(&local->sta_bss_lock);
2295 return bss;
2296}
2297
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002298#ifdef CONFIG_MAC80211_MESH
2299static struct ieee80211_sta_bss *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002300ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002301 u8 *mesh_cfg, int freq)
2302{
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002303 struct ieee80211_sta_bss *bss;
2304
2305 spin_lock_bh(&local->sta_bss_lock);
2306 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2307 while (bss) {
Johannes Berg902acc72008-02-23 15:17:19 +01002308 if (bss_mesh_cfg(bss) &&
2309 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002310 bss->freq == freq &&
2311 mesh_id_len == bss->mesh_id_len &&
2312 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2313 mesh_id_len))) {
2314 atomic_inc(&bss->users);
2315 break;
2316 }
2317 bss = bss->hnext;
2318 }
2319 spin_unlock_bh(&local->sta_bss_lock);
2320 return bss;
2321}
2322
2323static struct ieee80211_sta_bss *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002324ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
Luis Carlos Cobo05e5e882008-03-31 16:00:13 -07002325 u8 *mesh_cfg, int mesh_config_len, int freq)
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002326{
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002327 struct ieee80211_sta_bss *bss;
2328
Luis Carlos Cobo05e5e882008-03-31 16:00:13 -07002329 if (mesh_config_len != MESH_CFG_LEN)
2330 return NULL;
2331
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002332 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2333 if (!bss)
2334 return NULL;
2335
John W. Linville24736702008-04-08 14:15:46 -04002336 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002337 if (!bss->mesh_cfg) {
2338 kfree(bss);
2339 return NULL;
2340 }
2341
2342 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2343 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2344 if (!bss->mesh_id) {
2345 kfree(bss->mesh_cfg);
2346 kfree(bss);
2347 return NULL;
2348 }
2349 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2350 }
2351
2352 atomic_inc(&bss->users);
2353 atomic_inc(&bss->users);
John W. Linville24736702008-04-08 14:15:46 -04002354 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002355 bss->mesh_id_len = mesh_id_len;
2356 bss->freq = freq;
2357 spin_lock_bh(&local->sta_bss_lock);
2358 /* TODO: order by RSSI? */
2359 list_add_tail(&bss->list, &local->sta_bss_list);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002360 __ieee80211_rx_bss_hash_add(local, bss);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002361 spin_unlock_bh(&local->sta_bss_lock);
2362 return bss;
2363}
2364#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07002365
2366static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2367{
Jouni Malinen43ac2ca2008-08-15 22:21:27 +03002368 kfree(bss->ies);
Johannes Berg902acc72008-02-23 15:17:19 +01002369 kfree(bss_mesh_id(bss));
2370 kfree(bss_mesh_cfg(bss));
Jiri Bencf0706e82007-05-05 11:45:53 -07002371 kfree(bss);
2372}
2373
2374
Johannes Berg3e122be2008-07-09 14:40:34 +02002375static void ieee80211_rx_bss_put(struct ieee80211_local *local,
Jiri Bencf0706e82007-05-05 11:45:53 -07002376 struct ieee80211_sta_bss *bss)
2377{
Pavel Emelyanov1ebebea2008-04-23 11:47:15 +04002378 local_bh_disable();
2379 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2380 local_bh_enable();
2381 return;
2382 }
2383
Johannes Berg3e122be2008-07-09 14:40:34 +02002384 __ieee80211_rx_bss_hash_del(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002385 list_del(&bss->list);
2386 spin_unlock_bh(&local->sta_bss_lock);
2387 ieee80211_rx_bss_free(bss);
2388}
2389
2390
Johannes Berg3e122be2008-07-09 14:40:34 +02002391void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07002392{
Jiri Bencf0706e82007-05-05 11:45:53 -07002393 spin_lock_init(&local->sta_bss_lock);
2394 INIT_LIST_HEAD(&local->sta_bss_list);
2395}
2396
2397
Johannes Berg3e122be2008-07-09 14:40:34 +02002398void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
Jiri Bencf0706e82007-05-05 11:45:53 -07002399{
Jiri Bencf0706e82007-05-05 11:45:53 -07002400 struct ieee80211_sta_bss *bss, *tmp;
2401
2402 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
Johannes Berg3e122be2008-07-09 14:40:34 +02002403 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002404}
2405
2406
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002407static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
Bruno Randolfa6072682008-02-18 11:21:15 +09002408 struct ieee80211_if_sta *ifsta,
2409 struct ieee80211_sta_bss *bss)
2410{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002411 struct ieee80211_local *local = sdata->local;
Bruno Randolfa6072682008-02-18 11:21:15 +09002412 int res, rates, i, j;
2413 struct sk_buff *skb;
2414 struct ieee80211_mgmt *mgmt;
Bruno Randolfa6072682008-02-18 11:21:15 +09002415 u8 *pos;
Bruno Randolfa6072682008-02-18 11:21:15 +09002416 struct ieee80211_supported_band *sband;
Dan Williams507b06d2008-06-03 23:39:55 -04002417 union iwreq_data wrqu;
Bruno Randolfa6072682008-02-18 11:21:15 +09002418
2419 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2420
2421 /* Remove possible STA entries from other IBSS networks. */
Johannes Bergdc6676b2008-03-31 19:23:03 +02002422 sta_info_flush_delayed(sdata);
Bruno Randolfa6072682008-02-18 11:21:15 +09002423
2424 if (local->ops->reset_tsf) {
2425 /* Reset own TSF to allow time synchronization work. */
2426 local->ops->reset_tsf(local_to_hw(local));
2427 }
2428 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
Johannes Berg9d139c82008-07-09 14:40:37 +02002429 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
Bruno Randolfa6072682008-02-18 11:21:15 +09002430 if (res)
2431 return res;
2432
2433 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2434
Bruno Randolfa6072682008-02-18 11:21:15 +09002435 sdata->drop_unencrypted = bss->capability &
2436 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2437
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002438 res = ieee80211_set_freq(sdata, bss->freq);
Bruno Randolfa6072682008-02-18 11:21:15 +09002439
Assaf Kraussbe038b32008-06-05 19:55:21 +03002440 if (res)
2441 return res;
Bruno Randolfa6072682008-02-18 11:21:15 +09002442
Johannes Berg9d139c82008-07-09 14:40:37 +02002443 /* Build IBSS probe response */
Bruno Randolfa6072682008-02-18 11:21:15 +09002444 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
Johannes Berg9d139c82008-07-09 14:40:37 +02002445 if (skb) {
Bruno Randolfa6072682008-02-18 11:21:15 +09002446 skb_reserve(skb, local->hw.extra_tx_headroom);
2447
2448 mgmt = (struct ieee80211_mgmt *)
2449 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2450 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
Harvey Harrisone7827a72008-07-15 18:44:13 -07002451 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2452 IEEE80211_STYPE_PROBE_RESP);
Bruno Randolfa6072682008-02-18 11:21:15 +09002453 memset(mgmt->da, 0xff, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002454 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Bruno Randolfa6072682008-02-18 11:21:15 +09002455 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2456 mgmt->u.beacon.beacon_int =
2457 cpu_to_le16(local->hw.conf.beacon_int);
Assaf Krauss4faeb862008-06-30 17:23:16 +08002458 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
Bruno Randolfa6072682008-02-18 11:21:15 +09002459 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2460
2461 pos = skb_put(skb, 2 + ifsta->ssid_len);
2462 *pos++ = WLAN_EID_SSID;
2463 *pos++ = ifsta->ssid_len;
2464 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2465
2466 rates = bss->supp_rates_len;
2467 if (rates > 8)
2468 rates = 8;
2469 pos = skb_put(skb, 2 + rates);
2470 *pos++ = WLAN_EID_SUPP_RATES;
2471 *pos++ = rates;
2472 memcpy(pos, bss->supp_rates, rates);
2473
2474 if (bss->band == IEEE80211_BAND_2GHZ) {
2475 pos = skb_put(skb, 2 + 1);
2476 *pos++ = WLAN_EID_DS_PARAMS;
2477 *pos++ = 1;
2478 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2479 }
2480
2481 pos = skb_put(skb, 2 + 2);
2482 *pos++ = WLAN_EID_IBSS_PARAMS;
2483 *pos++ = 2;
2484 /* FIX: set ATIM window based on scan results */
2485 *pos++ = 0;
2486 *pos++ = 0;
2487
2488 if (bss->supp_rates_len > 8) {
2489 rates = bss->supp_rates_len - 8;
2490 pos = skb_put(skb, 2 + rates);
2491 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2492 *pos++ = rates;
2493 memcpy(pos, &bss->supp_rates[8], rates);
2494 }
2495
Johannes Berg9d139c82008-07-09 14:40:37 +02002496 ifsta->probe_resp = skb;
Johannes Berge039fa42008-05-15 12:55:29 +02002497
Johannes Berg9d139c82008-07-09 14:40:37 +02002498 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
Bruno Randolfa6072682008-02-18 11:21:15 +09002499 }
2500
Johannes Berg9d139c82008-07-09 14:40:37 +02002501 rates = 0;
2502 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2503 for (i = 0; i < bss->supp_rates_len; i++) {
2504 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2505 for (j = 0; j < sband->n_bitrates; j++)
2506 if (sband->bitrates[j].bitrate == bitrate)
2507 rates |= BIT(j);
2508 }
2509 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2510
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002511 ieee80211_sta_def_wmm_params(sdata, bss, 1);
Johannes Berg9d139c82008-07-09 14:40:37 +02002512
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002513 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
Bruno Randolfa6072682008-02-18 11:21:15 +09002514 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2515
Dan Williams507b06d2008-06-03 23:39:55 -04002516 memset(&wrqu, 0, sizeof(wrqu));
2517 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002518 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
Bruno Randolfa6072682008-02-18 11:21:15 +09002519
2520 return res;
2521}
2522
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002523u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2524 struct ieee802_11_elems *elems,
2525 enum ieee80211_band band)
2526{
2527 struct ieee80211_supported_band *sband;
2528 struct ieee80211_rate *bitrates;
2529 size_t num_rates;
2530 u64 supp_rates;
2531 int i, j;
2532 sband = local->hw.wiphy->bands[band];
2533
2534 if (!sband) {
2535 WARN_ON(1);
2536 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2537 }
2538
2539 bitrates = sband->bitrates;
2540 num_rates = sband->n_bitrates;
2541 supp_rates = 0;
2542 for (i = 0; i < elems->supp_rates_len +
2543 elems->ext_supp_rates_len; i++) {
2544 u8 rate = 0;
2545 int own_rate;
2546 if (i < elems->supp_rates_len)
2547 rate = elems->supp_rates[i];
2548 else if (elems->ext_supp_rates)
2549 rate = elems->ext_supp_rates
2550 [i - elems->supp_rates_len];
2551 own_rate = 5 * (rate & 0x7f);
2552 for (j = 0; j < num_rates; j++)
2553 if (bitrates[j].bitrate == own_rate)
2554 supp_rates |= BIT(j);
2555 }
2556 return supp_rates;
2557}
2558
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002559static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2560 enum ieee80211_band band)
2561{
2562 struct ieee80211_supported_band *sband;
2563 struct ieee80211_rate *bitrates;
2564 u64 mandatory_rates;
2565 enum ieee80211_rate_flags mandatory_flag;
2566 int i;
2567
2568 sband = local->hw.wiphy->bands[band];
2569 if (!sband) {
2570 WARN_ON(1);
2571 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2572 }
2573
2574 if (band == IEEE80211_BAND_2GHZ)
2575 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2576 else
2577 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2578
2579 bitrates = sband->bitrates;
2580 mandatory_rates = 0;
2581 for (i = 0; i < sband->n_bitrates; i++)
2582 if (bitrates[i].flags & mandatory_flag)
2583 mandatory_rates |= BIT(i);
2584 return mandatory_rates;
2585}
Bruno Randolfa6072682008-02-18 11:21:15 +09002586
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002587static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002588 struct ieee80211_mgmt *mgmt,
2589 size_t len,
2590 struct ieee80211_rx_status *rx_status,
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002591 struct ieee802_11_elems *elems)
Jiri Bencf0706e82007-05-05 11:45:53 -07002592{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002593 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01002594 int freq, clen;
Jiri Bencf0706e82007-05-05 11:45:53 -07002595 struct ieee80211_sta_bss *bss;
2596 struct sta_info *sta;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01002597 struct ieee80211_channel *channel;
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002598 u64 beacon_timestamp, rx_timestamp;
2599 u64 supp_rates = 0;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002600 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002601 enum ieee80211_band band = rx_status->band;
Joe Perches0795af52007-10-03 17:59:30 -07002602 DECLARE_MAC_BUF(mac);
2603 DECLARE_MAC_BUF(mac2);
Jiri Bencf0706e82007-05-05 11:45:53 -07002604
Bruno Randolf9d9bf772008-02-18 11:21:36 +09002605 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
Jiri Bencf0706e82007-05-05 11:45:53 -07002606
Ester Kummerae6a44e2008-06-27 18:54:48 +03002607 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002608 elems->mesh_config && mesh_matches_local(elems, sdata)) {
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002609 supp_rates = ieee80211_sta_get_rates(local, elems, band);
Johannes Berg902acc72008-02-23 15:17:19 +01002610
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002611 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002612 mesh_peer_accepts_plinks(elems));
Johannes Berg902acc72008-02-23 15:17:19 +01002613 }
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002614
Johannes Bergd0709a62008-02-25 16:27:46 +01002615 rcu_read_lock();
2616
Ester Kummerae6a44e2008-06-27 18:54:48 +03002617 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002618 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002619
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002620 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2621
2622 sta = sta_info_get(local, mgmt->sa);
2623 if (sta) {
2624 u64 prev_rates;
2625
2626 prev_rates = sta->supp_rates[band];
2627 /* make sure mandatory rates are always added */
2628 sta->supp_rates[band] = supp_rates |
2629 ieee80211_sta_get_mandatory_rates(local, band);
2630
2631#ifdef CONFIG_MAC80211_IBSS_DEBUG
2632 if (sta->supp_rates[band] != prev_rates)
2633 printk(KERN_DEBUG "%s: updated supp_rates set "
2634 "for %s based on beacon info (0x%llx | "
2635 "0x%llx -> 0x%llx)\n",
2636 sdata->dev->name, print_mac(mac, sta->addr),
2637 (unsigned long long) prev_rates,
2638 (unsigned long long) supp_rates,
2639 (unsigned long long) sta->supp_rates[band]);
2640#endif
2641 } else {
2642 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2643 mgmt->sa, supp_rates);
Jiri Bencf0706e82007-05-05 11:45:53 -07002644 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002645 }
2646
Johannes Bergd0709a62008-02-25 16:27:46 +01002647 rcu_read_unlock();
2648
Ester Kummerae6a44e2008-06-27 18:54:48 +03002649 if (elems->ds_params && elems->ds_params_len == 1)
2650 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
Jiri Bencf0706e82007-05-05 11:45:53 -07002651 else
Johannes Berg8318d782008-01-24 19:38:38 +01002652 freq = rx_status->freq;
Jiri Bencf0706e82007-05-05 11:45:53 -07002653
Johannes Bergfab7d4a2008-03-16 18:42:44 +01002654 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2655
2656 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2657 return;
2658
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002659#ifdef CONFIG_MAC80211_MESH
Ester Kummerae6a44e2008-06-27 18:54:48 +03002660 if (elems->mesh_config)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002661 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
Ester Kummerae6a44e2008-06-27 18:54:48 +03002662 elems->mesh_id_len, elems->mesh_config, freq);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002663 else
2664#endif
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002665 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
Ester Kummerae6a44e2008-06-27 18:54:48 +03002666 elems->ssid, elems->ssid_len);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002667 if (!bss) {
2668#ifdef CONFIG_MAC80211_MESH
Ester Kummerae6a44e2008-06-27 18:54:48 +03002669 if (elems->mesh_config)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002670 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
Ester Kummerae6a44e2008-06-27 18:54:48 +03002671 elems->mesh_id_len, elems->mesh_config,
2672 elems->mesh_config_len, freq);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002673 else
2674#endif
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002675 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
Ester Kummerae6a44e2008-06-27 18:54:48 +03002676 elems->ssid, elems->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07002677 if (!bss)
2678 return;
2679 } else {
2680#if 0
2681 /* TODO: order by RSSI? */
2682 spin_lock_bh(&local->sta_bss_lock);
2683 list_move_tail(&bss->list, &local->sta_bss_list);
2684 spin_unlock_bh(&local->sta_bss_lock);
2685#endif
2686 }
2687
Daniel Drake56282212007-07-10 19:32:10 +02002688 /* save the ERP value so that it is available at association time */
Ester Kummerae6a44e2008-06-27 18:54:48 +03002689 if (elems->erp_info && elems->erp_info_len >= 1) {
2690 bss->erp_value = elems->erp_info[0];
Daniel Drake56282212007-07-10 19:32:10 +02002691 bss->has_erp_value = 1;
2692 }
2693
Jiri Bencf0706e82007-05-05 11:45:53 -07002694 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2695 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
Jiri Bencf0706e82007-05-05 11:45:53 -07002696
Emmanuel Grumbach98f7dfd2008-07-18 13:52:59 +08002697 if (elems->tim) {
2698 struct ieee80211_tim_ie *tim_ie =
2699 (struct ieee80211_tim_ie *)elems->tim;
2700 bss->dtim_period = tim_ie->dtim_period;
2701 }
2702
2703 /* set default value for buggy APs */
2704 if (!elems->tim || bss->dtim_period == 0)
2705 bss->dtim_period = 1;
2706
Jiri Bencf0706e82007-05-05 11:45:53 -07002707 bss->supp_rates_len = 0;
Ester Kummerae6a44e2008-06-27 18:54:48 +03002708 if (elems->supp_rates) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002709 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
Ester Kummerae6a44e2008-06-27 18:54:48 +03002710 if (clen > elems->supp_rates_len)
2711 clen = elems->supp_rates_len;
2712 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
Jiri Bencf0706e82007-05-05 11:45:53 -07002713 clen);
2714 bss->supp_rates_len += clen;
2715 }
Ester Kummerae6a44e2008-06-27 18:54:48 +03002716 if (elems->ext_supp_rates) {
Jiri Bencf0706e82007-05-05 11:45:53 -07002717 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
Ester Kummerae6a44e2008-06-27 18:54:48 +03002718 if (clen > elems->ext_supp_rates_len)
2719 clen = elems->ext_supp_rates_len;
Jiri Bencf0706e82007-05-05 11:45:53 -07002720 memcpy(&bss->supp_rates[bss->supp_rates_len],
Ester Kummerae6a44e2008-06-27 18:54:48 +03002721 elems->ext_supp_rates, clen);
Jiri Bencf0706e82007-05-05 11:45:53 -07002722 bss->supp_rates_len += clen;
2723 }
2724
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002725 bss->band = band;
Johannes Berg30b89b02008-04-16 17:43:20 +02002726
2727 bss->timestamp = beacon_timestamp;
2728 bss->last_update = jiffies;
Johannes Berg30b89b02008-04-16 17:43:20 +02002729 bss->signal = rx_status->signal;
2730 bss->noise = rx_status->noise;
Bruno Randolf566bfe52008-05-08 19:15:40 +02002731 bss->qual = rx_status->qual;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002732 if (!beacon)
2733 bss->last_probe_resp = jiffies;
Johannes Berg30b89b02008-04-16 17:43:20 +02002734 /*
2735 * In STA mode, the remaining parameters should not be overridden
2736 * by beacons because they're not necessarily accurate there.
2737 */
2738 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002739 bss->last_probe_resp && beacon) {
Johannes Berg3e122be2008-07-09 14:40:34 +02002740 ieee80211_rx_bss_put(local, bss);
Johannes Berg30b89b02008-04-16 17:43:20 +02002741 return;
2742 }
2743
Jouni Malinen43ac2ca2008-08-15 22:21:27 +03002744 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2745 kfree(bss->ies);
2746 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
Jiri Bencf0706e82007-05-05 11:45:53 -07002747 }
Jouni Malinen43ac2ca2008-08-15 22:21:27 +03002748 if (bss->ies) {
2749 memcpy(bss->ies, elems->ie_start, elems->total_len);
2750 bss->ies_len = elems->total_len;
2751 } else
2752 bss->ies_len = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07002753
Jouni Malinen43ac2ca2008-08-15 22:21:27 +03002754 bss->wmm_used = elems->wmm_param || elems->wmm_info;
Bruno Randolf9d9bf772008-02-18 11:21:36 +09002755
2756 /* check if we need to merge IBSS */
2757 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2758 !local->sta_sw_scanning && !local->sta_hw_scanning &&
Johannes Bergfba4a1e2008-02-21 11:08:33 +01002759 bss->capability & WLAN_CAPABILITY_IBSS &&
Bruno Randolf9d9bf772008-02-18 11:21:36 +09002760 bss->freq == local->oper_channel->center_freq &&
Ester Kummerae6a44e2008-06-27 18:54:48 +03002761 elems->ssid_len == sdata->u.sta.ssid_len &&
2762 memcmp(elems->ssid, sdata->u.sta.ssid,
2763 sdata->u.sta.ssid_len) == 0) {
Bruno Randolf9d9bf772008-02-18 11:21:36 +09002764 if (rx_status->flag & RX_FLAG_TSFT) {
2765 /* in order for correct IBSS merging we need mactime
2766 *
2767 * since mactime is defined as the time the first data
2768 * symbol of the frame hits the PHY, and the timestamp
2769 * of the beacon is defined as "the time that the data
2770 * symbol containing the first bit of the timestamp is
2771 * transmitted to the PHY plus the transmitting STA’s
2772 * delays through its local PHY from the MAC-PHY
2773 * interface to its interface with the WM"
2774 * (802.11 11.1.2) - equals the time this bit arrives at
2775 * the receiver - we have to take into account the
2776 * offset between the two.
2777 * e.g: at 1 MBit that means mactime is 192 usec earlier
2778 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2779 */
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002780 int rate = local->hw.wiphy->bands[band]->
Bruno Randolf9d9bf772008-02-18 11:21:36 +09002781 bitrates[rx_status->rate_idx].bitrate;
2782 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2783 } else if (local && local->ops && local->ops->get_tsf)
2784 /* second best option: get current TSF */
2785 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2786 else
2787 /* can't merge without knowing the TSF */
2788 rx_timestamp = -1LLU;
2789#ifdef CONFIG_MAC80211_IBSS_DEBUG
2790 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2791 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2792 print_mac(mac, mgmt->sa),
2793 print_mac(mac2, mgmt->bssid),
2794 (unsigned long long)rx_timestamp,
2795 (unsigned long long)beacon_timestamp,
2796 (unsigned long long)(rx_timestamp - beacon_timestamp),
2797 jiffies);
2798#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2799 if (beacon_timestamp > rx_timestamp) {
John W. Linville576fdea2008-08-26 20:33:34 -04002800#ifdef CONFIG_MAC80211_IBSS_DEBUG
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002801 printk(KERN_DEBUG "%s: beacon TSF higher than "
2802 "local TSF - IBSS merge with BSSID %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002803 sdata->dev->name, print_mac(mac, mgmt->bssid));
Johannes Bergfba4a1e2008-02-21 11:08:33 +01002804#endif
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002805 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2806 ieee80211_ibss_add_sta(sdata, NULL,
Vladimir Koutny87291c02008-06-13 16:50:44 +02002807 mgmt->bssid, mgmt->sa,
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03002808 supp_rates);
Bruno Randolf9d9bf772008-02-18 11:21:36 +09002809 }
2810 }
2811
Johannes Berg3e122be2008-07-09 14:40:34 +02002812 ieee80211_rx_bss_put(local, bss);
Jiri Bencf0706e82007-05-05 11:45:53 -07002813}
2814
2815
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002816static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002817 struct ieee80211_mgmt *mgmt,
2818 size_t len,
2819 struct ieee80211_rx_status *rx_status)
2820{
Ester Kummerae6a44e2008-06-27 18:54:48 +03002821 size_t baselen;
2822 struct ieee802_11_elems elems;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002823 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Ester Kummerae6a44e2008-06-27 18:54:48 +03002824
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03002825 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2826 return; /* ignore ProbeResp to foreign address */
2827
Ester Kummerae6a44e2008-06-27 18:54:48 +03002828 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2829 if (baselen > len)
2830 return;
2831
2832 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2833 &elems);
2834
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002835 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2836
2837 /* direct probe may be part of the association flow */
2838 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2839 &ifsta->request)) {
2840 printk(KERN_DEBUG "%s direct probe responded\n",
2841 sdata->dev->name);
2842 ieee80211_authenticate(sdata, ifsta);
2843 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002844}
2845
2846
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002847static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002848 struct ieee80211_mgmt *mgmt,
2849 size_t len,
2850 struct ieee80211_rx_status *rx_status)
2851{
Jiri Bencf0706e82007-05-05 11:45:53 -07002852 struct ieee80211_if_sta *ifsta;
Jiri Bencf0706e82007-05-05 11:45:53 -07002853 size_t baselen;
2854 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002855 struct ieee80211_local *local = sdata->local;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002856 struct ieee80211_conf *conf = &local->hw.conf;
Johannes Berg471b3ef2007-12-28 14:32:58 +01002857 u32 changed = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07002858
Ester Kummerae6a44e2008-06-27 18:54:48 +03002859 /* Process beacon from the current BSS */
2860 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2861 if (baselen > len)
2862 return;
2863
2864 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2865
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002866 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
Jiri Bencf0706e82007-05-05 11:45:53 -07002867
Johannes Berg51fb61e2007-12-19 01:31:27 +01002868 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
Jiri Bencf0706e82007-05-05 11:45:53 -07002869 return;
2870 ifsta = &sdata->u.sta;
2871
Jiri Slabyd6f2da52007-08-28 17:01:54 -04002872 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
Jiri Bencf0706e82007-05-05 11:45:53 -07002873 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2874 return;
2875
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002876 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
Johannes Berg3434fbd2008-05-03 00:59:37 +02002877 elems.wmm_param_len);
Reinette Chatred18ef292008-04-09 16:56:15 -07002878
2879 /* Do not send changes to driver if we are scanning. This removes
2880 * requirement that driver's bss_info_changed function needs to be
2881 * atomic. */
2882 if (local->sta_sw_scanning || local->sta_hw_scanning)
2883 return;
2884
Daniel Drake56282212007-07-10 19:32:10 +02002885 if (elems.erp_info && elems.erp_info_len >= 1)
Johannes Berg471b3ef2007-12-28 14:32:58 +01002886 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
John W. Linville50c4afb2008-04-15 14:09:27 -04002887 else {
2888 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2889 changed |= ieee80211_handle_protect_preamb(sdata, false,
2890 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2891 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002892
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002893 if (elems.ht_cap_elem && elems.ht_info_elem &&
Tomas Winkler38668c02008-03-28 16:33:32 -07002894 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002895 struct ieee80211_ht_bss_info bss_info;
2896
2897 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2898 (struct ieee80211_ht_addt_info *)
2899 elems.ht_info_elem, &bss_info);
Tomas Winkler38668c02008-03-28 16:33:32 -07002900 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2901 &bss_info);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002902 }
2903
Johannes Berg471b3ef2007-12-28 14:32:58 +01002904 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07002905}
2906
2907
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002908static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002909 struct ieee80211_if_sta *ifsta,
2910 struct ieee80211_mgmt *mgmt,
2911 size_t len,
2912 struct ieee80211_rx_status *rx_status)
2913{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002914 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002915 int tx_last_beacon;
2916 struct sk_buff *skb;
2917 struct ieee80211_mgmt *resp;
2918 u8 *pos, *end;
Joe Perches0795af52007-10-03 17:59:30 -07002919 DECLARE_MAC_BUF(mac);
2920#ifdef CONFIG_MAC80211_IBSS_DEBUG
2921 DECLARE_MAC_BUF(mac2);
2922 DECLARE_MAC_BUF(mac3);
2923#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07002924
Johannes Berg51fb61e2007-12-19 01:31:27 +01002925 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
Tomas Winkler48c2fc52008-08-06 14:22:01 +03002926 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
Jiri Bencf0706e82007-05-05 11:45:53 -07002927 len < 24 + 2 || !ifsta->probe_resp)
2928 return;
2929
2930 if (local->ops->tx_last_beacon)
2931 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2932 else
2933 tx_last_beacon = 1;
2934
2935#ifdef CONFIG_MAC80211_IBSS_DEBUG
Joe Perches0795af52007-10-03 17:59:30 -07002936 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2937 "%s (tx_last_beacon=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002938 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
Joe Perches0795af52007-10-03 17:59:30 -07002939 print_mac(mac3, mgmt->bssid), tx_last_beacon);
Jiri Bencf0706e82007-05-05 11:45:53 -07002940#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2941
2942 if (!tx_last_beacon)
2943 return;
2944
2945 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2946 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2947 return;
2948
2949 end = ((u8 *) mgmt) + len;
2950 pos = mgmt->u.probe_req.variable;
2951 if (pos[0] != WLAN_EID_SSID ||
2952 pos + 2 + pos[1] > end) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002953#ifdef CONFIG_MAC80211_IBSS_DEBUG
2954 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2955 "from %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002956 sdata->dev->name, print_mac(mac, mgmt->sa));
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002957#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07002958 return;
2959 }
2960 if (pos[1] != 0 &&
2961 (pos[1] != ifsta->ssid_len ||
2962 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2963 /* Ignore ProbeReq for foreign SSID */
2964 return;
2965 }
2966
2967 /* Reply with ProbeResp */
Michael Wu0ec0b7a2007-07-27 15:43:24 +02002968 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07002969 if (!skb)
2970 return;
2971
2972 resp = (struct ieee80211_mgmt *) skb->data;
2973 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2974#ifdef CONFIG_MAC80211_IBSS_DEBUG
Joe Perches0795af52007-10-03 17:59:30 -07002975 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002976 sdata->dev->name, print_mac(mac, resp->da));
Jiri Bencf0706e82007-05-05 11:45:53 -07002977#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002978 ieee80211_sta_tx(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07002979}
2980
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002981static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
Johannes Berg4e20cb22007-12-19 01:31:24 +01002982 struct ieee80211_if_sta *ifsta,
2983 struct ieee80211_mgmt *mgmt,
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002984 size_t len,
2985 struct ieee80211_rx_status *rx_status)
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02002986{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002987 struct ieee80211_local *local = sdata->local;
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01002988
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02002989 if (len < IEEE80211_MIN_ACTION_SIZE)
2990 return;
2991
2992 switch (mgmt->u.action.category) {
Assaf Kraussb6623482008-06-16 16:09:49 +03002993 case WLAN_CATEGORY_SPECTRUM_MGMT:
2994 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2995 break;
2996 switch (mgmt->u.action.u.chan_switch.action_code) {
2997 case WLAN_ACTION_SPCT_MSR_REQ:
2998 if (len < (IEEE80211_MIN_ACTION_SIZE +
2999 sizeof(mgmt->u.action.u.measurement)))
3000 break;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003001 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
Assaf Kraussb6623482008-06-16 16:09:49 +03003002 break;
3003 }
3004 break;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02003005 case WLAN_CATEGORY_BACK:
3006 switch (mgmt->u.action.u.addba_req.action_code) {
3007 case WLAN_ACTION_ADDBA_REQ:
3008 if (len < (IEEE80211_MIN_ACTION_SIZE +
3009 sizeof(mgmt->u.action.u.addba_req)))
3010 break;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003011 ieee80211_sta_process_addba_request(local, mgmt, len);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02003012 break;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02003013 case WLAN_ACTION_ADDBA_RESP:
3014 if (len < (IEEE80211_MIN_ACTION_SIZE +
3015 sizeof(mgmt->u.action.u.addba_resp)))
3016 break;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003017 ieee80211_sta_process_addba_resp(local, mgmt, len);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02003018 break;
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02003019 case WLAN_ACTION_DELBA:
3020 if (len < (IEEE80211_MIN_ACTION_SIZE +
3021 sizeof(mgmt->u.action.u.delba)))
3022 break;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003023 ieee80211_sta_process_delba(sdata, mgmt, len);
Ron Rindjunsky688b88a2007-12-25 17:00:37 +02003024 break;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02003025 }
3026 break;
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003027 case PLINK_CATEGORY:
Johannes Berg902acc72008-02-23 15:17:19 +01003028 if (ieee80211_vif_is_mesh(&sdata->vif))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003029 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003030 break;
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003031 case MESH_PATH_SEL_CATEGORY:
Johannes Berg902acc72008-02-23 15:17:19 +01003032 if (ieee80211_vif_is_mesh(&sdata->vif))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003033 mesh_rx_path_sel_frame(sdata, mgmt, len);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003034 break;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02003035 }
3036}
Jiri Bencf0706e82007-05-05 11:45:53 -07003037
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003038void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
Jiri Bencf0706e82007-05-05 11:45:53 -07003039 struct ieee80211_rx_status *rx_status)
3040{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003041 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003042 struct ieee80211_if_sta *ifsta;
3043 struct ieee80211_mgmt *mgmt;
3044 u16 fc;
3045
3046 if (skb->len < 24)
3047 goto fail;
3048
Jiri Bencf0706e82007-05-05 11:45:53 -07003049 ifsta = &sdata->u.sta;
3050
3051 mgmt = (struct ieee80211_mgmt *) skb->data;
3052 fc = le16_to_cpu(mgmt->frame_control);
3053
3054 switch (fc & IEEE80211_FCTL_STYPE) {
3055 case IEEE80211_STYPE_PROBE_REQ:
3056 case IEEE80211_STYPE_PROBE_RESP:
3057 case IEEE80211_STYPE_BEACON:
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003058 case IEEE80211_STYPE_ACTION:
Jiri Bencf0706e82007-05-05 11:45:53 -07003059 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3060 case IEEE80211_STYPE_AUTH:
3061 case IEEE80211_STYPE_ASSOC_RESP:
3062 case IEEE80211_STYPE_REASSOC_RESP:
3063 case IEEE80211_STYPE_DEAUTH:
3064 case IEEE80211_STYPE_DISASSOC:
3065 skb_queue_tail(&ifsta->skb_queue, skb);
3066 queue_work(local->hw.workqueue, &ifsta->work);
3067 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07003068 }
3069
3070 fail:
3071 kfree_skb(skb);
3072}
3073
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003074static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003075 struct sk_buff *skb)
3076{
3077 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07003078 struct ieee80211_if_sta *ifsta;
3079 struct ieee80211_mgmt *mgmt;
3080 u16 fc;
3081
Jiri Bencf0706e82007-05-05 11:45:53 -07003082 ifsta = &sdata->u.sta;
3083
3084 rx_status = (struct ieee80211_rx_status *) skb->cb;
3085 mgmt = (struct ieee80211_mgmt *) skb->data;
3086 fc = le16_to_cpu(mgmt->frame_control);
3087
3088 switch (fc & IEEE80211_FCTL_STYPE) {
3089 case IEEE80211_STYPE_PROBE_REQ:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003090 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
Jiri Bencf0706e82007-05-05 11:45:53 -07003091 rx_status);
3092 break;
3093 case IEEE80211_STYPE_PROBE_RESP:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003094 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
Jiri Bencf0706e82007-05-05 11:45:53 -07003095 break;
3096 case IEEE80211_STYPE_BEACON:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003097 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
Jiri Bencf0706e82007-05-05 11:45:53 -07003098 break;
3099 case IEEE80211_STYPE_AUTH:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003100 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07003101 break;
3102 case IEEE80211_STYPE_ASSOC_RESP:
Johannes Berg471b3ef2007-12-28 14:32:58 +01003103 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07003104 break;
3105 case IEEE80211_STYPE_REASSOC_RESP:
Johannes Berg471b3ef2007-12-28 14:32:58 +01003106 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
Jiri Bencf0706e82007-05-05 11:45:53 -07003107 break;
3108 case IEEE80211_STYPE_DEAUTH:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003109 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07003110 break;
3111 case IEEE80211_STYPE_DISASSOC:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003112 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
Jiri Bencf0706e82007-05-05 11:45:53 -07003113 break;
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02003114 case IEEE80211_STYPE_ACTION:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003115 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
Ron Rindjunsky9f985b02007-11-26 16:14:32 +02003116 break;
Jiri Bencf0706e82007-05-05 11:45:53 -07003117 }
3118
3119 kfree_skb(skb);
3120}
3121
3122
Johannes Berg9ae54c82008-01-31 19:48:20 +01003123ieee80211_rx_result
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003124ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
Zhu Yiece8edd2007-11-22 10:53:21 +08003125 struct ieee80211_rx_status *rx_status)
Jiri Bencf0706e82007-05-05 11:45:53 -07003126{
3127 struct ieee80211_mgmt *mgmt;
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003128 __le16 fc;
Jiri Bencf0706e82007-05-05 11:45:53 -07003129
Zhu Yiece8edd2007-11-22 10:53:21 +08003130 if (skb->len < 2)
Johannes Berge4c26ad2008-01-31 19:48:21 +01003131 return RX_DROP_UNUSABLE;
Jiri Bencf0706e82007-05-05 11:45:53 -07003132
3133 mgmt = (struct ieee80211_mgmt *) skb->data;
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003134 fc = mgmt->frame_control;
Jiri Bencf0706e82007-05-05 11:45:53 -07003135
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003136 if (ieee80211_is_ctl(fc))
Johannes Berg9ae54c82008-01-31 19:48:20 +01003137 return RX_CONTINUE;
Zhu Yiece8edd2007-11-22 10:53:21 +08003138
3139 if (skb->len < 24)
Johannes Berge4c26ad2008-01-31 19:48:21 +01003140 return RX_DROP_MONITOR;
Zhu Yiece8edd2007-11-22 10:53:21 +08003141
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003142 if (ieee80211_is_probe_resp(fc)) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003143 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003144 dev_kfree_skb(skb);
3145 return RX_QUEUED;
Jiri Bencf0706e82007-05-05 11:45:53 -07003146 }
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003147
3148 if (ieee80211_is_beacon(fc)) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003149 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003150 dev_kfree_skb(skb);
3151 return RX_QUEUED;
3152 }
3153
Johannes Berg9ae54c82008-01-31 19:48:20 +01003154 return RX_CONTINUE;
Jiri Bencf0706e82007-05-05 11:45:53 -07003155}
3156
3157
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003158static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
Jiri Bencf0706e82007-05-05 11:45:53 -07003159{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003160 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003161 int active = 0;
3162 struct sta_info *sta;
3163
Johannes Bergd0709a62008-02-25 16:27:46 +01003164 rcu_read_lock();
3165
3166 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3167 if (sta->sdata == sdata &&
Jiri Bencf0706e82007-05-05 11:45:53 -07003168 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3169 jiffies)) {
3170 active++;
3171 break;
3172 }
3173 }
Johannes Bergd0709a62008-02-25 16:27:46 +01003174
3175 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07003176
3177 return active;
3178}
3179
3180
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003181static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
Jiri Bencf0706e82007-05-05 11:45:53 -07003182{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003183 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003184 struct sta_info *sta, *tmp;
Michael Wube8755e2007-07-27 15:43:23 +02003185 LIST_HEAD(tmp_list);
Joe Perches0795af52007-10-03 17:59:30 -07003186 DECLARE_MAC_BUF(mac);
Johannes Bergd0709a62008-02-25 16:27:46 +01003187 unsigned long flags;
Jiri Bencf0706e82007-05-05 11:45:53 -07003188
Johannes Bergd0709a62008-02-25 16:27:46 +01003189 spin_lock_irqsave(&local->sta_lock, flags);
Jiri Bencf0706e82007-05-05 11:45:53 -07003190 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003191 if (time_after(jiffies, sta->last_rx + exp_time)) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +02003192#ifdef CONFIG_MAC80211_IBSS_DEBUG
Joe Perches0795af52007-10-03 17:59:30 -07003193 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003194 sdata->dev->name, print_mac(mac, sta->addr));
Johannes Bergf4ea83d2008-06-30 15:10:46 +02003195#endif
Luis Carlos Cobocb585bc2008-03-31 15:21:23 -07003196 __sta_info_unlink(&sta);
Johannes Bergd0709a62008-02-25 16:27:46 +01003197 if (sta)
3198 list_add(&sta->list, &tmp_list);
Jiri Bencf0706e82007-05-05 11:45:53 -07003199 }
Johannes Bergd0709a62008-02-25 16:27:46 +01003200 spin_unlock_irqrestore(&local->sta_lock, flags);
Michael Wube8755e2007-07-27 15:43:23 +02003201
Johannes Bergd0709a62008-02-25 16:27:46 +01003202 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3203 sta_info_destroy(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003204}
3205
3206
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003207static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003208 struct ieee80211_if_sta *ifsta)
3209{
3210 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3211
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003212 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3213 if (ieee80211_sta_active_ibss(sdata))
Jiri Bencf0706e82007-05-05 11:45:53 -07003214 return;
3215
3216 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003217 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3218 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07003219}
3220
3221
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003222#ifdef CONFIG_MAC80211_MESH
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003223static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003224 struct ieee80211_if_sta *ifsta)
3225{
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003226 bool free_plinks;
3227
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003228 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3229 mesh_path_expire(sdata);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003230
3231 free_plinks = mesh_plink_availables(sdata);
3232 if (free_plinks != sdata->u.sta.accepting_plinks)
Johannes Berg9d139c82008-07-09 14:40:37 +02003233 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003234
3235 mod_timer(&ifsta->timer, jiffies +
3236 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3237}
3238
3239
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003240void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003241{
3242 struct ieee80211_if_sta *ifsta;
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003243 ifsta = &sdata->u.sta;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003244 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003245 ieee80211_sta_timer((unsigned long)sdata);
Luis Carlos Cobo56a6d132008-07-29 19:59:31 +02003246 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003247}
3248#endif
3249
3250
Jiri Bencf0706e82007-05-05 11:45:53 -07003251void ieee80211_sta_timer(unsigned long data)
3252{
3253 struct ieee80211_sub_if_data *sdata =
3254 (struct ieee80211_sub_if_data *) data;
3255 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003256 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003257
3258 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3259 queue_work(local->hw.workqueue, &ifsta->work);
3260}
3261
Jiri Bencf0706e82007-05-05 11:45:53 -07003262void ieee80211_sta_work(struct work_struct *work)
3263{
3264 struct ieee80211_sub_if_data *sdata =
3265 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003266 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003267 struct ieee80211_if_sta *ifsta;
3268 struct sk_buff *skb;
3269
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003270 if (!netif_running(sdata->dev))
Jiri Bencf0706e82007-05-05 11:45:53 -07003271 return;
3272
Zhu Yiece8edd2007-11-22 10:53:21 +08003273 if (local->sta_sw_scanning || local->sta_hw_scanning)
Jiri Bencf0706e82007-05-05 11:45:53 -07003274 return;
3275
Johannes Bergf4ea83d2008-06-30 15:10:46 +02003276 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3277 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3278 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
Jiri Bencf0706e82007-05-05 11:45:53 -07003279 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07003280 ifsta = &sdata->u.sta;
3281
3282 while ((skb = skb_dequeue(&ifsta->skb_queue)))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003283 ieee80211_sta_rx_queued_mgmt(sdata, skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07003284
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003285#ifdef CONFIG_MAC80211_MESH
Johannes Berg902acc72008-02-23 15:17:19 +01003286 if (ifsta->preq_queue_len &&
3287 time_after(jiffies,
3288 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003289 mesh_path_start_discovery(sdata);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003290#endif
3291
Ron Rindjunsky9859b812008-08-09 03:02:19 +03003292 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3293 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003294 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
Jiri Bencf0706e82007-05-05 11:45:53 -07003295 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
Helmut Schaaa0af5f12007-11-09 16:25:08 +01003296 if (ifsta->scan_ssid_len)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003297 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
Helmut Schaaa0af5f12007-11-09 16:25:08 +01003298 else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003299 ieee80211_sta_start_scan(sdata, NULL, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07003300 return;
3301 }
3302
3303 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003304 if (ieee80211_sta_config_auth(sdata, ifsta))
Jiri Bencf0706e82007-05-05 11:45:53 -07003305 return;
3306 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3307 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3308 return;
3309
3310 switch (ifsta->state) {
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003311 case IEEE80211_STA_MLME_DISABLED:
Jiri Bencf0706e82007-05-05 11:45:53 -07003312 break;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03003313 case IEEE80211_STA_MLME_DIRECT_PROBE:
3314 ieee80211_direct_probe(sdata, ifsta);
3315 break;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003316 case IEEE80211_STA_MLME_AUTHENTICATE:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003317 ieee80211_authenticate(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003318 break;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003319 case IEEE80211_STA_MLME_ASSOCIATE:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003320 ieee80211_associate(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003321 break;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003322 case IEEE80211_STA_MLME_ASSOCIATED:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003323 ieee80211_associated(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003324 break;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003325 case IEEE80211_STA_MLME_IBSS_SEARCH:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003326 ieee80211_sta_find_ibss(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003327 break;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003328 case IEEE80211_STA_MLME_IBSS_JOINED:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003329 ieee80211_sta_merge_ibss(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003330 break;
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003331#ifdef CONFIG_MAC80211_MESH
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003332 case IEEE80211_STA_MLME_MESH_UP:
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003333 ieee80211_mesh_housekeeping(sdata, ifsta);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003334 break;
3335#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07003336 default:
Johannes Bergf4ea83d2008-06-30 15:10:46 +02003337 WARN_ON(1);
Jiri Bencf0706e82007-05-05 11:45:53 -07003338 break;
3339 }
3340
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003341 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003342 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003343 "mixed-cell disabled - disassociate\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07003344
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003345 ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED);
3346 ieee80211_set_disassoc(sdata, ifsta, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07003347 }
3348}
3349
3350
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003351static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003352 struct ieee80211_if_sta *ifsta)
3353{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003354 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003355
3356 if (local->ops->reset_tsf) {
3357 /* Reset own TSF to allow time synchronization work. */
3358 local->ops->reset_tsf(local_to_hw(local));
3359 }
3360
3361 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3362
3363
3364 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3365 ifsta->auth_alg = WLAN_AUTH_OPEN;
3366 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3367 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3368 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3369 ifsta->auth_alg = WLAN_AUTH_LEAP;
3370 else
3371 ifsta->auth_alg = WLAN_AUTH_OPEN;
Jiri Bencf0706e82007-05-05 11:45:53 -07003372 ifsta->auth_transaction = -1;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003373 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03003374 ifsta->assoc_scan_tries = 0;
Ron Rindjunsky9859b812008-08-09 03:02:19 +03003375 ifsta->direct_probe_tries = 0;
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03003376 ifsta->auth_tries = 0;
3377 ifsta->assoc_tries = 0;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003378 netif_carrier_off(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -07003379}
3380
3381
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003382void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003383 struct ieee80211_if_sta *ifsta)
3384{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003385 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003386
Johannes Berg51fb61e2007-12-19 01:31:27 +01003387 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
Jiri Bencf0706e82007-05-05 11:45:53 -07003388 return;
3389
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003390 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3391 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3392 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3393 IEEE80211_STA_AUTO_SSID_SEL))) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003394 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3395 queue_work(local->hw.workqueue, &ifsta->work);
3396 }
3397}
3398
3399static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3400 const char *ssid, int ssid_len)
3401{
3402 int tmp, hidden_ssid;
3403
Michael Wu48225702007-10-19 17:14:36 -04003404 if (ssid_len == ifsta->ssid_len &&
3405 !memcmp(ifsta->ssid, ssid, ssid_len))
Jiri Bencf0706e82007-05-05 11:45:53 -07003406 return 1;
3407
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003408 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
Jiri Bencf0706e82007-05-05 11:45:53 -07003409 return 0;
3410
3411 hidden_ssid = 1;
3412 tmp = ssid_len;
3413 while (tmp--) {
3414 if (ssid[tmp] != '\0') {
3415 hidden_ssid = 0;
3416 break;
3417 }
3418 }
3419
3420 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3421 return 1;
3422
3423 if (ssid_len == 1 && ssid[0] == ' ')
3424 return 1;
3425
3426 return 0;
3427}
3428
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003429static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003430 struct ieee80211_if_sta *ifsta)
3431{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003432 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003433 struct ieee80211_sta_bss *bss, *selected = NULL;
3434 int top_rssi = 0, freq;
3435
Jiri Bencf0706e82007-05-05 11:45:53 -07003436 spin_lock_bh(&local->sta_bss_lock);
Johannes Berg8318d782008-01-24 19:38:38 +01003437 freq = local->oper_channel->center_freq;
Jiri Bencf0706e82007-05-05 11:45:53 -07003438 list_for_each_entry(bss, &local->sta_bss_list, list) {
3439 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3440 continue;
3441
Abhijeet Kolekar34a961f2008-05-09 09:35:41 -07003442 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3443 IEEE80211_STA_AUTO_BSSID_SEL |
3444 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3445 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3446 !!sdata->default_key))
Jiri Bencf0706e82007-05-05 11:45:53 -07003447 continue;
3448
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003449 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3450 bss->freq != freq)
Jiri Bencf0706e82007-05-05 11:45:53 -07003451 continue;
3452
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003453 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
Jiri Bencf0706e82007-05-05 11:45:53 -07003454 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3455 continue;
3456
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003457 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
Jiri Bencf0706e82007-05-05 11:45:53 -07003458 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3459 continue;
3460
Bruno Randolf566bfe52008-05-08 19:15:40 +02003461 if (!selected || top_rssi < bss->signal) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003462 selected = bss;
Bruno Randolf566bfe52008-05-08 19:15:40 +02003463 top_rssi = bss->signal;
Jiri Bencf0706e82007-05-05 11:45:53 -07003464 }
3465 }
3466 if (selected)
3467 atomic_inc(&selected->users);
3468 spin_unlock_bh(&local->sta_bss_lock);
3469
3470 if (selected) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003471 ieee80211_set_freq(sdata, selected->freq);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003472 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003473 ieee80211_sta_set_ssid(sdata, selected->ssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07003474 selected->ssid_len);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003475 ieee80211_sta_set_bssid(sdata, selected->bssid);
3476 ieee80211_sta_def_wmm_params(sdata, selected, 0);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03003477
3478 /* Send out direct probe if no probe resp was received or
3479 * the one we have is outdated
3480 */
3481 if (!selected->last_probe_resp ||
3482 time_after(jiffies, selected->last_probe_resp
3483 + IEEE80211_SCAN_RESULT_EXPIRE))
3484 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3485 else
3486 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3487
Johannes Berg3e122be2008-07-09 14:40:34 +02003488 ieee80211_rx_bss_put(local, selected);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003489 ieee80211_sta_reset_auth(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003490 return 0;
3491 } else {
Ron Rindjunsky6042a3e2008-08-08 01:50:46 +03003492 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3493 ifsta->assoc_scan_tries++;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003494 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003495 ieee80211_sta_start_scan(sdata, NULL, 0);
John W. Linvilleb9bf1e62007-08-07 16:33:15 -04003496 else
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003497 ieee80211_sta_start_scan(sdata, ifsta->ssid,
John W. Linvilleb9bf1e62007-08-07 16:33:15 -04003498 ifsta->ssid_len);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003499 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
Jiri Bencf0706e82007-05-05 11:45:53 -07003500 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3501 } else
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003502 ifsta->state = IEEE80211_STA_MLME_DISABLED;
Jiri Bencf0706e82007-05-05 11:45:53 -07003503 }
Jiri Bencf0706e82007-05-05 11:45:53 -07003504 return -1;
3505}
3506
Jiri Bencf0706e82007-05-05 11:45:53 -07003507
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003508static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003509 struct ieee80211_if_sta *ifsta)
3510{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003511 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003512 struct ieee80211_sta_bss *bss;
Johannes Berg8318d782008-01-24 19:38:38 +01003513 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07003514 u8 bssid[ETH_ALEN], *pos;
3515 int i;
Tomas Winkler167ad6f2008-05-21 18:17:05 +03003516 int ret;
Joe Perches0795af52007-10-03 17:59:30 -07003517 DECLARE_MAC_BUF(mac);
Jiri Bencf0706e82007-05-05 11:45:53 -07003518
3519#if 0
3520 /* Easier testing, use fixed BSSID. */
3521 memset(bssid, 0xfe, ETH_ALEN);
3522#else
3523 /* Generate random, not broadcast, locally administered BSSID. Mix in
3524 * own MAC address to make sure that devices that do not have proper
3525 * random number generator get different BSSID. */
3526 get_random_bytes(bssid, ETH_ALEN);
3527 for (i = 0; i < ETH_ALEN; i++)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003528 bssid[i] ^= sdata->dev->dev_addr[i];
Jiri Bencf0706e82007-05-05 11:45:53 -07003529 bssid[0] &= ~0x01;
3530 bssid[0] |= 0x02;
3531#endif
3532
Joe Perches0795af52007-10-03 17:59:30 -07003533 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003534 sdata->dev->name, print_mac(mac, bssid));
Jiri Bencf0706e82007-05-05 11:45:53 -07003535
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003536 bss = ieee80211_rx_bss_add(sdata, bssid,
Johannes Berg8318d782008-01-24 19:38:38 +01003537 local->hw.conf.channel->center_freq,
John W. Linvillecffdd302007-10-05 14:23:27 -04003538 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07003539 if (!bss)
3540 return -ENOMEM;
3541
Johannes Berg8318d782008-01-24 19:38:38 +01003542 bss->band = local->hw.conf.channel->band;
3543 sband = local->hw.wiphy->bands[bss->band];
Jiri Bencf0706e82007-05-05 11:45:53 -07003544
3545 if (local->hw.conf.beacon_int == 0)
Tomas Winklerdc0ae302008-06-12 22:38:37 +03003546 local->hw.conf.beacon_int = 100;
Jiri Bencf0706e82007-05-05 11:45:53 -07003547 bss->beacon_int = local->hw.conf.beacon_int;
Jiri Bencf0706e82007-05-05 11:45:53 -07003548 bss->last_update = jiffies;
3549 bss->capability = WLAN_CAPABILITY_IBSS;
Johannes Berg988c0f72008-04-17 19:21:22 +02003550
3551 if (sdata->default_key)
Jiri Bencf0706e82007-05-05 11:45:53 -07003552 bss->capability |= WLAN_CAPABILITY_PRIVACY;
Johannes Berg988c0f72008-04-17 19:21:22 +02003553 else
Jiri Bencf0706e82007-05-05 11:45:53 -07003554 sdata->drop_unencrypted = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +02003555
Johannes Berg8318d782008-01-24 19:38:38 +01003556 bss->supp_rates_len = sband->n_bitrates;
Jiri Bencf0706e82007-05-05 11:45:53 -07003557 pos = bss->supp_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01003558 for (i = 0; i < sband->n_bitrates; i++) {
3559 int rate = sband->bitrates[i].bitrate;
Jiri Bencf0706e82007-05-05 11:45:53 -07003560 *pos++ = (u8) (rate / 5);
3561 }
3562
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003563 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
Johannes Berg3e122be2008-07-09 14:40:34 +02003564 ieee80211_rx_bss_put(local, bss);
Tomas Winkler167ad6f2008-05-21 18:17:05 +03003565 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07003566}
3567
3568
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003569static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003570 struct ieee80211_if_sta *ifsta)
3571{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003572 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003573 struct ieee80211_sta_bss *bss;
3574 int found = 0;
3575 u8 bssid[ETH_ALEN];
3576 int active_ibss;
Joe Perches0795af52007-10-03 17:59:30 -07003577 DECLARE_MAC_BUF(mac);
3578 DECLARE_MAC_BUF(mac2);
Jiri Bencf0706e82007-05-05 11:45:53 -07003579
3580 if (ifsta->ssid_len == 0)
3581 return -EINVAL;
3582
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003583 active_ibss = ieee80211_sta_active_ibss(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07003584#ifdef CONFIG_MAC80211_IBSS_DEBUG
3585 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003586 sdata->dev->name, active_ibss);
Jiri Bencf0706e82007-05-05 11:45:53 -07003587#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3588 spin_lock_bh(&local->sta_bss_lock);
3589 list_for_each_entry(bss, &local->sta_bss_list, list) {
3590 if (ifsta->ssid_len != bss->ssid_len ||
3591 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3592 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3593 continue;
3594#ifdef CONFIG_MAC80211_IBSS_DEBUG
Joe Perches0795af52007-10-03 17:59:30 -07003595 printk(KERN_DEBUG " bssid=%s found\n",
3596 print_mac(mac, bss->bssid));
Jiri Bencf0706e82007-05-05 11:45:53 -07003597#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3598 memcpy(bssid, bss->bssid, ETH_ALEN);
3599 found = 1;
3600 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3601 break;
3602 }
3603 spin_unlock_bh(&local->sta_bss_lock);
3604
3605#ifdef CONFIG_MAC80211_IBSS_DEBUG
Vladimir Koutny6e438292008-07-07 14:23:01 +02003606 if (found)
3607 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3608 "%s\n", print_mac(mac, bssid),
3609 print_mac(mac2, ifsta->bssid));
Jiri Bencf0706e82007-05-05 11:45:53 -07003610#endif /* CONFIG_MAC80211_IBSS_DEBUG */
Daniel Drake80693ce2008-07-19 23:31:17 +01003611
3612 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
Tomas Winkler167ad6f2008-05-21 18:17:05 +03003613 int ret;
Daniel Drake80693ce2008-07-19 23:31:17 +01003614 int search_freq;
3615
3616 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3617 search_freq = bss->freq;
3618 else
3619 search_freq = local->hw.conf.channel->center_freq;
3620
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003621 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
Daniel Drake80693ce2008-07-19 23:31:17 +01003622 ifsta->ssid, ifsta->ssid_len);
3623 if (!bss)
3624 goto dont_join;
3625
Joe Perches0795af52007-10-03 17:59:30 -07003626 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
Jiri Bencf0706e82007-05-05 11:45:53 -07003627 " based on configured SSID\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003628 sdata->dev->name, print_mac(mac, bssid));
3629 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
Johannes Berg3e122be2008-07-09 14:40:34 +02003630 ieee80211_rx_bss_put(local, bss);
Tomas Winkler167ad6f2008-05-21 18:17:05 +03003631 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07003632 }
Daniel Drake80693ce2008-07-19 23:31:17 +01003633
3634dont_join:
Jiri Bencf0706e82007-05-05 11:45:53 -07003635#ifdef CONFIG_MAC80211_IBSS_DEBUG
3636 printk(KERN_DEBUG " did not try to join ibss\n");
3637#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3638
3639 /* Selected IBSS not found in current scan results - try to scan */
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003640 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003641 !ieee80211_sta_active_ibss(sdata)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003642 mod_timer(&ifsta->timer, jiffies +
3643 IEEE80211_IBSS_MERGE_INTERVAL);
3644 } else if (time_after(jiffies, local->last_scan_completed +
3645 IEEE80211_SCAN_INTERVAL)) {
3646 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003647 "join\n", sdata->dev->name);
3648 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
Jiri Bencf0706e82007-05-05 11:45:53 -07003649 ifsta->ssid_len);
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003650 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003651 int interval = IEEE80211_SCAN_INTERVAL;
3652
3653 if (time_after(jiffies, ifsta->ibss_join_req +
3654 IEEE80211_IBSS_JOIN_TIMEOUT)) {
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003655 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
Johannes Berg8318d782008-01-24 19:38:38 +01003656 (!(local->oper_channel->flags &
3657 IEEE80211_CHAN_NO_IBSS)))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003658 return ieee80211_sta_create_ibss(sdata, ifsta);
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003659 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
Johannes Berg8318d782008-01-24 19:38:38 +01003660 printk(KERN_DEBUG "%s: IBSS not allowed on"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003661 " %d MHz\n", sdata->dev->name,
Johannes Berg8318d782008-01-24 19:38:38 +01003662 local->hw.conf.channel->center_freq);
Jiri Bencf0706e82007-05-05 11:45:53 -07003663 }
3664
3665 /* No IBSS found - decrease scan interval and continue
3666 * scanning. */
3667 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3668 }
3669
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003670 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
Jiri Bencf0706e82007-05-05 11:45:53 -07003671 mod_timer(&ifsta->timer, jiffies + interval);
3672 return 0;
3673 }
3674
3675 return 0;
3676}
3677
3678
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003679int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07003680{
Jiri Bencf0706e82007-05-05 11:45:53 -07003681 struct ieee80211_if_sta *ifsta;
Johannes Berg9d139c82008-07-09 14:40:37 +02003682 int res;
Jiri Bencf0706e82007-05-05 11:45:53 -07003683
3684 if (len > IEEE80211_MAX_SSID_LEN)
3685 return -EINVAL;
3686
Jiri Bencf0706e82007-05-05 11:45:53 -07003687 ifsta = &sdata->u.sta;
3688
Johannes Berg9d139c82008-07-09 14:40:37 +02003689 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3690 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3691 memcpy(ifsta->ssid, ssid, len);
3692 ifsta->ssid_len = len;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003693 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Johannes Berg9d139c82008-07-09 14:40:37 +02003694
3695 res = 0;
3696 /*
3697 * Hack! MLME code needs to be cleaned up to have different
3698 * entry points for configuration and internal selection change
3699 */
3700 if (netif_running(sdata->dev))
3701 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3702 if (res) {
3703 printk(KERN_DEBUG "%s: Failed to config new SSID to "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003704 "the low-level driver\n", sdata->dev->name);
Johannes Berg9d139c82008-07-09 14:40:37 +02003705 return res;
3706 }
3707 }
Jiri Bencf0706e82007-05-05 11:45:53 -07003708
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003709 if (len)
3710 ifsta->flags |= IEEE80211_STA_SSID_SET;
3711 else
3712 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
Johannes Berg9d139c82008-07-09 14:40:37 +02003713
Johannes Berg51fb61e2007-12-19 01:31:27 +01003714 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003715 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003716 ifsta->ibss_join_req = jiffies;
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003717 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003718 return ieee80211_sta_find_ibss(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003719 }
Johannes Berg9d139c82008-07-09 14:40:37 +02003720
Jiri Bencf0706e82007-05-05 11:45:53 -07003721 return 0;
3722}
3723
3724
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003725int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
Jiri Bencf0706e82007-05-05 11:45:53 -07003726{
Jiri Bencf0706e82007-05-05 11:45:53 -07003727 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3728 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3729 *len = ifsta->ssid_len;
3730 return 0;
3731}
3732
3733
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003734int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
Jiri Bencf0706e82007-05-05 11:45:53 -07003735{
Jiri Bencf0706e82007-05-05 11:45:53 -07003736 struct ieee80211_if_sta *ifsta;
3737 int res;
3738
Jiri Bencf0706e82007-05-05 11:45:53 -07003739 ifsta = &sdata->u.sta;
3740
3741 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3742 memcpy(ifsta->bssid, bssid, ETH_ALEN);
Johannes Berg9d139c82008-07-09 14:40:37 +02003743 res = 0;
3744 /*
3745 * Hack! See also ieee80211_sta_set_ssid.
3746 */
3747 if (netif_running(sdata->dev))
3748 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
Jiri Bencf0706e82007-05-05 11:45:53 -07003749 if (res) {
3750 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003751 "the low-level driver\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07003752 return res;
3753 }
3754 }
3755
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003756 if (is_valid_ether_addr(bssid))
3757 ifsta->flags |= IEEE80211_STA_BSSID_SET;
Jiri Bencf0706e82007-05-05 11:45:53 -07003758 else
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003759 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3760
Jiri Bencf0706e82007-05-05 11:45:53 -07003761 return 0;
3762}
3763
3764
3765static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3766 struct ieee80211_sub_if_data *sdata,
3767 int powersave)
3768{
3769 struct sk_buff *skb;
3770 struct ieee80211_hdr *nullfunc;
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003771 __le16 fc;
Jiri Bencf0706e82007-05-05 11:45:53 -07003772
3773 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3774 if (!skb) {
3775 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3776 "frame\n", sdata->dev->name);
3777 return;
3778 }
3779 skb_reserve(skb, local->hw.extra_tx_headroom);
3780
3781 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3782 memset(nullfunc, 0, 24);
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003783 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3784 IEEE80211_FCTL_TODS);
Jiri Bencf0706e82007-05-05 11:45:53 -07003785 if (powersave)
Harvey Harrison4e3996f2008-06-22 16:45:32 -07003786 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3787 nullfunc->frame_control = fc;
Jiri Bencf0706e82007-05-05 11:45:53 -07003788 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3789 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3790 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3791
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003792 ieee80211_sta_tx(sdata, skb, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07003793}
3794
3795
Johannes Berg69d3b6f2008-03-05 10:58:40 +01003796static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3797{
3798 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3799 ieee80211_vif_is_mesh(&sdata->vif))
3800 ieee80211_sta_timer((unsigned long)sdata);
3801}
3802
Jiri Bencf0706e82007-05-05 11:45:53 -07003803void ieee80211_scan_completed(struct ieee80211_hw *hw)
3804{
3805 struct ieee80211_local *local = hw_to_local(hw);
3806 struct net_device *dev = local->scan_dev;
3807 struct ieee80211_sub_if_data *sdata;
3808 union iwreq_data wrqu;
3809
3810 local->last_scan_completed = jiffies;
Zhu Yiece8edd2007-11-22 10:53:21 +08003811 memset(&wrqu, 0, sizeof(wrqu));
3812 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
Jiri Bencf0706e82007-05-05 11:45:53 -07003813
Zhu Yiece8edd2007-11-22 10:53:21 +08003814 if (local->sta_hw_scanning) {
3815 local->sta_hw_scanning = 0;
Mohamed Abbas675ef582008-03-20 08:14:29 -07003816 if (ieee80211_hw_config(local))
3817 printk(KERN_DEBUG "%s: failed to restore operational "
3818 "channel after scan\n", dev->name);
Johannes Berg69d3b6f2008-03-05 10:58:40 +01003819 /* Restart STA timer for HW scan case */
3820 rcu_read_lock();
3821 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3822 ieee80211_restart_sta_timer(sdata);
3823 rcu_read_unlock();
3824
Zhu Yiece8edd2007-11-22 10:53:21 +08003825 goto done;
3826 }
3827
3828 local->sta_sw_scanning = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07003829 if (ieee80211_hw_config(local))
Bruno Randolf4b50e382007-11-16 17:04:01 +09003830 printk(KERN_DEBUG "%s: failed to restore operational "
Jiri Bencf0706e82007-05-05 11:45:53 -07003831 "channel after scan\n", dev->name);
3832
Johannes Berg4150c572007-09-17 01:29:23 -04003833
3834 netif_tx_lock_bh(local->mdev);
David S. Millere308a5d2008-07-15 00:13:44 -07003835 netif_addr_lock(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -04003836 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3837 local->ops->configure_filter(local_to_hw(local),
3838 FIF_BCN_PRBRESP_PROMISC,
3839 &local->filter_flags,
3840 local->mdev->mc_count,
3841 local->mdev->mc_list);
3842
David S. Millere308a5d2008-07-15 00:13:44 -07003843 netif_addr_unlock(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -04003844 netif_tx_unlock_bh(local->mdev);
Jiri Bencf0706e82007-05-05 11:45:53 -07003845
Johannes Berg79010422007-09-18 17:29:21 -04003846 rcu_read_lock();
3847 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg69d3b6f2008-03-05 10:58:40 +01003848 /* Tell AP we're back */
3849 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3850 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3851 ieee80211_send_nullfunc(local, sdata, 0);
Mattias Nissler14042cbe2007-06-08 15:31:13 +02003852
Johannes Berg69d3b6f2008-03-05 10:58:40 +01003853 ieee80211_restart_sta_timer(sdata);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01003854
Jiri Bencf0706e82007-05-05 11:45:53 -07003855 netif_wake_queue(sdata->dev);
3856 }
Johannes Berg79010422007-09-18 17:29:21 -04003857 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07003858
Zhu Yiece8edd2007-11-22 10:53:21 +08003859done:
Jiri Bencf0706e82007-05-05 11:45:53 -07003860 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg51fb61e2007-12-19 01:31:27 +01003861 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003862 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04003863 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
Tomas Winkler48c2fc52008-08-06 14:22:01 +03003864 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003865 !ieee80211_sta_active_ibss(sdata)))
3866 ieee80211_sta_find_ibss(sdata, ifsta);
Jiri Bencf0706e82007-05-05 11:45:53 -07003867 }
3868}
3869EXPORT_SYMBOL(ieee80211_scan_completed);
3870
3871void ieee80211_sta_scan_work(struct work_struct *work)
3872{
3873 struct ieee80211_local *local =
3874 container_of(work, struct ieee80211_local, scan_work.work);
3875 struct net_device *dev = local->scan_dev;
3876 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg8318d782008-01-24 19:38:38 +01003877 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07003878 struct ieee80211_channel *chan;
3879 int skip;
3880 unsigned long next_delay = 0;
3881
Zhu Yiece8edd2007-11-22 10:53:21 +08003882 if (!local->sta_sw_scanning)
Jiri Bencf0706e82007-05-05 11:45:53 -07003883 return;
3884
3885 switch (local->scan_state) {
3886 case SCAN_SET_CHANNEL:
Johannes Berg69d464d2008-01-28 17:08:56 +01003887 /*
3888 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3889 * after we successfully scanned the last channel of the last
3890 * band (and the last band is supported by the hw)
3891 */
Johannes Berg8318d782008-01-24 19:38:38 +01003892 if (local->scan_band < IEEE80211_NUM_BANDS)
3893 sband = local->hw.wiphy->bands[local->scan_band];
3894 else
3895 sband = NULL;
3896
Johannes Berg69d464d2008-01-28 17:08:56 +01003897 /*
3898 * If we are at an unsupported band and have more bands
3899 * left to scan, advance to the next supported one.
3900 */
3901 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
Johannes Berg8318d782008-01-24 19:38:38 +01003902 local->scan_band++;
3903 sband = local->hw.wiphy->bands[local->scan_band];
3904 local->scan_channel_idx = 0;
3905 }
3906
Johannes Berg69d464d2008-01-28 17:08:56 +01003907 /* if no more bands/channels left, complete scan */
3908 if (!sband || local->scan_channel_idx >= sband->n_channels) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003909 ieee80211_scan_completed(local_to_hw(local));
3910 return;
3911 }
Johannes Berg8318d782008-01-24 19:38:38 +01003912 skip = 0;
3913 chan = &sband->channels[local->scan_channel_idx];
3914
3915 if (chan->flags & IEEE80211_CHAN_DISABLED ||
Johannes Berg51fb61e2007-12-19 01:31:27 +01003916 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
Johannes Berg8318d782008-01-24 19:38:38 +01003917 chan->flags & IEEE80211_CHAN_NO_IBSS))
Jiri Bencf0706e82007-05-05 11:45:53 -07003918 skip = 1;
3919
3920 if (!skip) {
Jiri Bencf0706e82007-05-05 11:45:53 -07003921 local->scan_channel = chan;
3922 if (ieee80211_hw_config(local)) {
Johannes Berg8318d782008-01-24 19:38:38 +01003923 printk(KERN_DEBUG "%s: failed to set freq to "
3924 "%d MHz for scan\n", dev->name,
3925 chan->center_freq);
Jiri Bencf0706e82007-05-05 11:45:53 -07003926 skip = 1;
3927 }
3928 }
3929
Johannes Berg69d464d2008-01-28 17:08:56 +01003930 /* advance state machine to next channel/band */
Jiri Bencf0706e82007-05-05 11:45:53 -07003931 local->scan_channel_idx++;
Johannes Berg8318d782008-01-24 19:38:38 +01003932 if (local->scan_channel_idx >= sband->n_channels) {
Johannes Berg69d464d2008-01-28 17:08:56 +01003933 /*
3934 * scan_band may end up == IEEE80211_NUM_BANDS, but
3935 * we'll catch that case above and complete the scan
3936 * if that is the case.
3937 */
Johannes Berg8318d782008-01-24 19:38:38 +01003938 local->scan_band++;
3939 local->scan_channel_idx = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07003940 }
3941
3942 if (skip)
3943 break;
3944
3945 next_delay = IEEE80211_PROBE_DELAY +
3946 usecs_to_jiffies(local->hw.channel_change_time);
3947 local->scan_state = SCAN_SEND_PROBE;
3948 break;
3949 case SCAN_SEND_PROBE:
Johannes Berg8318d782008-01-24 19:38:38 +01003950 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
Jiri Bencf0706e82007-05-05 11:45:53 -07003951 local->scan_state = SCAN_SET_CHANNEL;
Johannes Berg8318d782008-01-24 19:38:38 +01003952
3953 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3954 break;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003955 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
Johannes Berg8318d782008-01-24 19:38:38 +01003956 local->scan_ssid_len);
3957 next_delay = IEEE80211_CHANNEL_TIME;
Jiri Bencf0706e82007-05-05 11:45:53 -07003958 break;
3959 }
3960
Zhu Yiece8edd2007-11-22 10:53:21 +08003961 if (local->sta_sw_scanning)
Jiri Bencf0706e82007-05-05 11:45:53 -07003962 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3963 next_delay);
3964}
3965
3966
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003967static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07003968 u8 *ssid, size_t ssid_len)
3969{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003970 struct ieee80211_local *local = scan_sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07003971 struct ieee80211_sub_if_data *sdata;
3972
3973 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3974 return -EINVAL;
3975
3976 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3977 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3978 * BSSID: MACAddress
3979 * SSID
3980 * ScanType: ACTIVE, PASSIVE
3981 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3982 * a Probe frame during active scanning
3983 * ChannelList
3984 * MinChannelTime (>= ProbeDelay), in TU
3985 * MaxChannelTime: (>= MinChannelTime), in TU
3986 */
3987
3988 /* MLME-SCAN.confirm
3989 * BSSDescriptionSet
3990 * ResultCode: SUCCESS, INVALID_PARAMETERS
3991 */
3992
Zhu Yiece8edd2007-11-22 10:53:21 +08003993 if (local->sta_sw_scanning || local->sta_hw_scanning) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12003994 if (local->scan_dev == scan_sdata->dev)
Jiri Bencf0706e82007-05-05 11:45:53 -07003995 return 0;
3996 return -EBUSY;
3997 }
3998
3999 if (local->ops->hw_scan) {
4000 int rc = local->ops->hw_scan(local_to_hw(local),
Zhu Yiece8edd2007-11-22 10:53:21 +08004001 ssid, ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07004002 if (!rc) {
Zhu Yiece8edd2007-11-22 10:53:21 +08004003 local->sta_hw_scanning = 1;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004004 local->scan_dev = scan_sdata->dev;
Jiri Bencf0706e82007-05-05 11:45:53 -07004005 }
4006 return rc;
4007 }
4008
Zhu Yiece8edd2007-11-22 10:53:21 +08004009 local->sta_sw_scanning = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07004010
Johannes Berg79010422007-09-18 17:29:21 -04004011 rcu_read_lock();
4012 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Jiri Bencf0706e82007-05-05 11:45:53 -07004013 netif_stop_queue(sdata->dev);
Johannes Berg51fb61e2007-12-19 01:31:27 +01004014 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
Jiri Slabyd6f2da52007-08-28 17:01:54 -04004015 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
Jiri Bencf0706e82007-05-05 11:45:53 -07004016 ieee80211_send_nullfunc(local, sdata, 1);
4017 }
Johannes Berg79010422007-09-18 17:29:21 -04004018 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07004019
4020 if (ssid) {
4021 local->scan_ssid_len = ssid_len;
4022 memcpy(local->scan_ssid, ssid, ssid_len);
4023 } else
4024 local->scan_ssid_len = 0;
4025 local->scan_state = SCAN_SET_CHANNEL;
Jiri Bencf0706e82007-05-05 11:45:53 -07004026 local->scan_channel_idx = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01004027 local->scan_band = IEEE80211_BAND_2GHZ;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004028 local->scan_dev = scan_sdata->dev;
Jiri Bencf0706e82007-05-05 11:45:53 -07004029
David S. Millerb9e40852008-07-15 00:15:08 -07004030 netif_addr_lock_bh(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -04004031 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4032 local->ops->configure_filter(local_to_hw(local),
4033 FIF_BCN_PRBRESP_PROMISC,
4034 &local->filter_flags,
4035 local->mdev->mc_count,
4036 local->mdev->mc_list);
David S. Millerb9e40852008-07-15 00:15:08 -07004037 netif_addr_unlock_bh(local->mdev);
Jiri Bencf0706e82007-05-05 11:45:53 -07004038
4039 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4040 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4041 IEEE80211_CHANNEL_TIME);
4042
4043 return 0;
4044}
4045
4046
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004047int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
Jiri Bencf0706e82007-05-05 11:45:53 -07004048{
Jiri Bencf0706e82007-05-05 11:45:53 -07004049 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004050 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07004051
Johannes Berg51fb61e2007-12-19 01:31:27 +01004052 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004053 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07004054
Zhu Yiece8edd2007-11-22 10:53:21 +08004055 if (local->sta_sw_scanning || local->sta_hw_scanning) {
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004056 if (local->scan_dev == sdata->dev)
Jiri Bencf0706e82007-05-05 11:45:53 -07004057 return 0;
4058 return -EBUSY;
4059 }
4060
Helmut Schaaa0af5f12007-11-09 16:25:08 +01004061 ifsta->scan_ssid_len = ssid_len;
4062 if (ssid_len)
4063 memcpy(ifsta->scan_ssid, ssid, ssid_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07004064 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4065 queue_work(local->hw.workqueue, &ifsta->work);
4066 return 0;
4067}
4068
Jouni Malinen43ac2ca2008-08-15 22:21:27 +03004069
4070static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
4071 struct ieee80211_sta_bss *bss,
4072 char **current_ev, char *end_buf)
4073{
4074 u8 *pos, *end, *next;
4075 struct iw_event iwe;
4076
4077 if (bss == NULL || bss->ies == NULL)
4078 return;
4079
4080 /*
4081 * If needed, fragment the IEs buffer (at IE boundaries) into short
4082 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
4083 */
4084 pos = bss->ies;
4085 end = pos + bss->ies_len;
4086
4087 while (end - pos > IW_GENERIC_IE_MAX) {
4088 next = pos + 2 + pos[1];
4089 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
4090 next = next + 2 + next[1];
4091
4092 memset(&iwe, 0, sizeof(iwe));
4093 iwe.cmd = IWEVGENIE;
4094 iwe.u.data.length = next - pos;
4095 *current_ev = iwe_stream_add_point(info, *current_ev,
4096 end_buf, &iwe, pos);
4097
4098 pos = next;
4099 }
4100
4101 if (end > pos) {
4102 memset(&iwe, 0, sizeof(iwe));
4103 iwe.cmd = IWEVGENIE;
4104 iwe.u.data.length = end - pos;
4105 *current_ev = iwe_stream_add_point(info, *current_ev,
4106 end_buf, &iwe, pos);
4107 }
4108}
4109
4110
Jiri Bencf0706e82007-05-05 11:45:53 -07004111static char *
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004112ieee80211_sta_scan_result(struct ieee80211_local *local,
David S. Millerccc58052008-06-16 18:50:49 -07004113 struct iw_request_info *info,
Jiri Bencf0706e82007-05-05 11:45:53 -07004114 struct ieee80211_sta_bss *bss,
4115 char *current_ev, char *end_buf)
4116{
Jiri Bencf0706e82007-05-05 11:45:53 -07004117 struct iw_event iwe;
4118
4119 if (time_after(jiffies,
4120 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4121 return current_ev;
4122
Jiri Bencf0706e82007-05-05 11:45:53 -07004123 memset(&iwe, 0, sizeof(iwe));
4124 iwe.cmd = SIOCGIWAP;
4125 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4126 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
David S. Millerccc58052008-06-16 18:50:49 -07004127 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
Jiri Bencf0706e82007-05-05 11:45:53 -07004128 IW_EV_ADDR_LEN);
4129
4130 memset(&iwe, 0, sizeof(iwe));
4131 iwe.cmd = SIOCGIWESSID;
Johannes Berg902acc72008-02-23 15:17:19 +01004132 if (bss_mesh_cfg(bss)) {
4133 iwe.u.data.length = bss_mesh_id_len(bss);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004134 iwe.u.data.flags = 1;
David S. Millerccc58052008-06-16 18:50:49 -07004135 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4136 &iwe, bss_mesh_id(bss));
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004137 } else {
4138 iwe.u.data.length = bss->ssid_len;
4139 iwe.u.data.flags = 1;
David S. Millerccc58052008-06-16 18:50:49 -07004140 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4141 &iwe, bss->ssid);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004142 }
Jiri Bencf0706e82007-05-05 11:45:53 -07004143
Luis Carlos Cobo1d1b5352008-02-29 12:15:28 -08004144 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4145 || bss_mesh_cfg(bss)) {
Jiri Bencf0706e82007-05-05 11:45:53 -07004146 memset(&iwe, 0, sizeof(iwe));
4147 iwe.cmd = SIOCGIWMODE;
Johannes Berg902acc72008-02-23 15:17:19 +01004148 if (bss_mesh_cfg(bss))
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004149 iwe.u.mode = IW_MODE_MESH;
4150 else if (bss->capability & WLAN_CAPABILITY_ESS)
Jiri Bencf0706e82007-05-05 11:45:53 -07004151 iwe.u.mode = IW_MODE_MASTER;
4152 else
4153 iwe.u.mode = IW_MODE_ADHOC;
David S. Millerccc58052008-06-16 18:50:49 -07004154 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4155 &iwe, IW_EV_UINT_LEN);
Jiri Bencf0706e82007-05-05 11:45:53 -07004156 }
4157
4158 memset(&iwe, 0, sizeof(iwe));
4159 iwe.cmd = SIOCGIWFREQ;
Johannes Berg8318d782008-01-24 19:38:38 +01004160 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4161 iwe.u.freq.e = 0;
David S. Millerccc58052008-06-16 18:50:49 -07004162 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
Jiri Bencf0706e82007-05-05 11:45:53 -07004163 IW_EV_FREQ_LEN);
4164
4165 memset(&iwe, 0, sizeof(iwe));
Tomas Winkler9381be02008-05-23 01:36:36 +03004166 iwe.cmd = SIOCGIWFREQ;
4167 iwe.u.freq.m = bss->freq;
4168 iwe.u.freq.e = 6;
David S. Millerccc58052008-06-16 18:50:49 -07004169 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
Tomas Winkler9381be02008-05-23 01:36:36 +03004170 IW_EV_FREQ_LEN);
4171 memset(&iwe, 0, sizeof(iwe));
Jiri Bencf0706e82007-05-05 11:45:53 -07004172 iwe.cmd = IWEVQUAL;
Bruno Randolf566bfe52008-05-08 19:15:40 +02004173 iwe.u.qual.qual = bss->qual;
4174 iwe.u.qual.level = bss->signal;
Jiri Bencf0706e82007-05-05 11:45:53 -07004175 iwe.u.qual.noise = bss->noise;
4176 iwe.u.qual.updated = local->wstats_flags;
David S. Millerccc58052008-06-16 18:50:49 -07004177 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
Jiri Bencf0706e82007-05-05 11:45:53 -07004178 IW_EV_QUAL_LEN);
4179
4180 memset(&iwe, 0, sizeof(iwe));
4181 iwe.cmd = SIOCGIWENCODE;
4182 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4183 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4184 else
4185 iwe.u.data.flags = IW_ENCODE_DISABLED;
4186 iwe.u.data.length = 0;
David S. Millerccc58052008-06-16 18:50:49 -07004187 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4188 &iwe, "");
Jiri Bencf0706e82007-05-05 11:45:53 -07004189
Jouni Malinen43ac2ca2008-08-15 22:21:27 +03004190 ieee80211_sta_add_scan_ies(info, bss, &current_ev, end_buf);
Emmanuel Grumbache6231572008-05-27 20:00:11 +03004191
Jiri Bencf0706e82007-05-05 11:45:53 -07004192 if (bss && bss->supp_rates_len > 0) {
4193 /* display all supported rates in readable format */
David S. Millerccc58052008-06-16 18:50:49 -07004194 char *p = current_ev + iwe_stream_lcp_len(info);
Jiri Bencf0706e82007-05-05 11:45:53 -07004195 int i;
4196
4197 memset(&iwe, 0, sizeof(iwe));
4198 iwe.cmd = SIOCGIWRATE;
4199 /* Those two flags are ignored... */
4200 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4201
4202 for (i = 0; i < bss->supp_rates_len; i++) {
4203 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4204 0x7f) * 500000);
David S. Millerccc58052008-06-16 18:50:49 -07004205 p = iwe_stream_add_value(info, current_ev, p,
Jiri Bencf0706e82007-05-05 11:45:53 -07004206 end_buf, &iwe, IW_EV_PARAM_LEN);
4207 }
4208 current_ev = p;
4209 }
4210
4211 if (bss) {
4212 char *buf;
4213 buf = kmalloc(30, GFP_ATOMIC);
4214 if (buf) {
4215 memset(&iwe, 0, sizeof(iwe));
4216 iwe.cmd = IWEVCUSTOM;
4217 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4218 iwe.u.data.length = strlen(buf);
David S. Millerccc58052008-06-16 18:50:49 -07004219 current_ev = iwe_stream_add_point(info, current_ev,
4220 end_buf,
Jiri Bencf0706e82007-05-05 11:45:53 -07004221 &iwe, buf);
Emmanuel Grumbachbf998f62008-06-24 13:38:00 +03004222 memset(&iwe, 0, sizeof(iwe));
4223 iwe.cmd = IWEVCUSTOM;
4224 sprintf(buf, " Last beacon: %dms ago",
4225 jiffies_to_msecs(jiffies - bss->last_update));
4226 iwe.u.data.length = strlen(buf);
4227 current_ev = iwe_stream_add_point(info, current_ev,
4228 end_buf, &iwe, buf);
Jiri Bencf0706e82007-05-05 11:45:53 -07004229 kfree(buf);
4230 }
4231 }
4232
Johannes Berg902acc72008-02-23 15:17:19 +01004233 if (bss_mesh_cfg(bss)) {
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004234 char *buf;
John W. Linville24736702008-04-08 14:15:46 -04004235 u8 *cfg = bss_mesh_cfg(bss);
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004236 buf = kmalloc(50, GFP_ATOMIC);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004237 if (buf) {
4238 memset(&iwe, 0, sizeof(iwe));
4239 iwe.cmd = IWEVCUSTOM;
John W. Linville24736702008-04-08 14:15:46 -04004240 sprintf(buf, "Mesh network (version %d)", cfg[0]);
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004241 iwe.u.data.length = strlen(buf);
David S. Millerccc58052008-06-16 18:50:49 -07004242 current_ev = iwe_stream_add_point(info, current_ev,
4243 end_buf,
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004244 &iwe, buf);
4245 sprintf(buf, "Path Selection Protocol ID: "
John W. Linville24736702008-04-08 14:15:46 -04004246 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4247 cfg[4]);
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004248 iwe.u.data.length = strlen(buf);
David S. Millerccc58052008-06-16 18:50:49 -07004249 current_ev = iwe_stream_add_point(info, current_ev,
4250 end_buf,
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004251 &iwe, buf);
4252 sprintf(buf, "Path Selection Metric ID: "
John W. Linville24736702008-04-08 14:15:46 -04004253 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4254 cfg[8]);
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004255 iwe.u.data.length = strlen(buf);
David S. Millerccc58052008-06-16 18:50:49 -07004256 current_ev = iwe_stream_add_point(info, current_ev,
4257 end_buf,
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004258 &iwe, buf);
4259 sprintf(buf, "Congestion Control Mode ID: "
John W. Linville24736702008-04-08 14:15:46 -04004260 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4261 cfg[11], cfg[12]);
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004262 iwe.u.data.length = strlen(buf);
David S. Millerccc58052008-06-16 18:50:49 -07004263 current_ev = iwe_stream_add_point(info, current_ev,
4264 end_buf,
Luis Carlos Cobo4f5d4c42008-02-29 12:32:46 -08004265 &iwe, buf);
4266 sprintf(buf, "Channel Precedence: "
John W. Linville24736702008-04-08 14:15:46 -04004267 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4268 cfg[15], cfg[16]);
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004269 iwe.u.data.length = strlen(buf);
David S. Millerccc58052008-06-16 18:50:49 -07004270 current_ev = iwe_stream_add_point(info, current_ev,
4271 end_buf,
Luis Carlos Cobof709fc62008-02-23 15:17:12 +01004272 &iwe, buf);
4273 kfree(buf);
4274 }
4275 }
4276
Jiri Bencf0706e82007-05-05 11:45:53 -07004277 return current_ev;
4278}
4279
4280
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004281int ieee80211_sta_scan_results(struct ieee80211_local *local,
David S. Millerccc58052008-06-16 18:50:49 -07004282 struct iw_request_info *info,
4283 char *buf, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07004284{
Jiri Bencf0706e82007-05-05 11:45:53 -07004285 char *current_ev = buf;
4286 char *end_buf = buf + len;
4287 struct ieee80211_sta_bss *bss;
4288
4289 spin_lock_bh(&local->sta_bss_lock);
4290 list_for_each_entry(bss, &local->sta_bss_list, list) {
4291 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4292 spin_unlock_bh(&local->sta_bss_lock);
4293 return -E2BIG;
4294 }
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004295 current_ev = ieee80211_sta_scan_result(local, info, bss,
David S. Millerccc58052008-06-16 18:50:49 -07004296 current_ev, end_buf);
Jiri Bencf0706e82007-05-05 11:45:53 -07004297 }
4298 spin_unlock_bh(&local->sta_bss_lock);
4299 return current_ev - buf;
4300}
4301
4302
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004303int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07004304{
Jiri Bencf0706e82007-05-05 11:45:53 -07004305 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
Johannes Berg988c0f72008-04-17 19:21:22 +02004306
Jiri Bencf0706e82007-05-05 11:45:53 -07004307 kfree(ifsta->extra_ie);
4308 if (len == 0) {
4309 ifsta->extra_ie = NULL;
4310 ifsta->extra_ie_len = 0;
4311 return 0;
4312 }
4313 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4314 if (!ifsta->extra_ie) {
4315 ifsta->extra_ie_len = 0;
4316 return -ENOMEM;
4317 }
4318 memcpy(ifsta->extra_ie, ie, len);
4319 ifsta->extra_ie_len = len;
4320 return 0;
4321}
4322
4323
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004324struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
Johannes Berg988c0f72008-04-17 19:21:22 +02004325 struct sk_buff *skb, u8 *bssid,
Vladimir Koutny87291c02008-06-13 16:50:44 +02004326 u8 *addr, u64 supp_rates)
Jiri Bencf0706e82007-05-05 11:45:53 -07004327{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004328 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07004329 struct sta_info *sta;
Joe Perches0795af52007-10-03 17:59:30 -07004330 DECLARE_MAC_BUF(mac);
Vladimir Koutny87291c02008-06-13 16:50:44 +02004331 int band = local->hw.conf.channel->band;
Jiri Bencf0706e82007-05-05 11:45:53 -07004332
4333 /* TODO: Could consider removing the least recently used entry and
4334 * allow new one to be added. */
4335 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4336 if (net_ratelimit()) {
4337 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004338 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
Jiri Bencf0706e82007-05-05 11:45:53 -07004339 }
4340 return NULL;
4341 }
4342
Emmanuel Grumbach1e188632008-07-10 17:54:14 +03004343 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
Vladimir Koutny87291c02008-06-13 16:50:44 +02004344 return NULL;
4345
Johannes Bergf4ea83d2008-06-30 15:10:46 +02004346#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Joe Perches0795af52007-10-03 17:59:30 -07004347 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004348 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02004349#endif
Jiri Bencf0706e82007-05-05 11:45:53 -07004350
Johannes Berg73651ee2008-02-25 16:27:47 +01004351 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4352 if (!sta)
Jiri Bencf0706e82007-05-05 11:45:53 -07004353 return NULL;
4354
Johannes Berg07346f812008-05-03 01:02:02 +02004355 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
Johannes Berg238814f2008-01-28 17:19:37 +01004356
Emmanuel Grumbach8e1535d2008-09-03 23:42:20 +03004357 /* make sure mandatory rates are always added */
4358 sta->supp_rates[band] = supp_rates |
4359 ieee80211_sta_get_mandatory_rates(local, band);
Jiri Bencf0706e82007-05-05 11:45:53 -07004360
4361 rate_control_rate_init(sta, local);
4362
Johannes Berg93e5deb2008-04-01 15:21:00 +02004363 if (sta_info_insert(sta))
Johannes Berg73651ee2008-02-25 16:27:47 +01004364 return NULL;
Johannes Berg73651ee2008-02-25 16:27:47 +01004365
Johannes Bergd0709a62008-02-25 16:27:46 +01004366 return sta;
Jiri Bencf0706e82007-05-05 11:45:53 -07004367}
4368
4369
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004370int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
Jiri Bencf0706e82007-05-05 11:45:53 -07004371{
Jiri Bencf0706e82007-05-05 11:45:53 -07004372 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4373
Johannes Bergf4ea83d2008-06-30 15:10:46 +02004374 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004375 sdata->dev->name, reason);
Jiri Bencf0706e82007-05-05 11:45:53 -07004376
Johannes Berg51fb61e2007-12-19 01:31:27 +01004377 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4378 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
Jiri Bencf0706e82007-05-05 11:45:53 -07004379 return -EINVAL;
4380
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004381 ieee80211_send_deauth(sdata, ifsta, reason);
4382 ieee80211_set_disassoc(sdata, ifsta, 1);
Jiri Bencf0706e82007-05-05 11:45:53 -07004383 return 0;
4384}
4385
4386
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004387int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
Jiri Bencf0706e82007-05-05 11:45:53 -07004388{
Jiri Bencf0706e82007-05-05 11:45:53 -07004389 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4390
Johannes Bergf4ea83d2008-06-30 15:10:46 +02004391 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004392 sdata->dev->name, reason);
Jiri Bencf0706e82007-05-05 11:45:53 -07004393
Johannes Berg51fb61e2007-12-19 01:31:27 +01004394 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
Jiri Bencf0706e82007-05-05 11:45:53 -07004395 return -EINVAL;
4396
Jiri Slabyd6f2da52007-08-28 17:01:54 -04004397 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
Jiri Bencf0706e82007-05-05 11:45:53 -07004398 return -1;
4399
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004400 ieee80211_send_disassoc(sdata, ifsta, reason);
4401 ieee80211_set_disassoc(sdata, ifsta, 0);
Jiri Bencf0706e82007-05-05 11:45:53 -07004402 return 0;
4403}
Mohamed Abbas84363e62008-04-04 16:59:58 -07004404
4405void ieee80211_notify_mac(struct ieee80211_hw *hw,
4406 enum ieee80211_notification_types notif_type)
4407{
4408 struct ieee80211_local *local = hw_to_local(hw);
4409 struct ieee80211_sub_if_data *sdata;
4410
4411 switch (notif_type) {
4412 case IEEE80211_NOTIFY_RE_ASSOC:
4413 rcu_read_lock();
4414 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg3e122be2008-07-09 14:40:34 +02004415 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4416 continue;
Mohamed Abbas84363e62008-04-04 16:59:58 -07004417
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12004418 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
Mohamed Abbas84363e62008-04-04 16:59:58 -07004419 }
4420 rcu_read_unlock();
4421 break;
4422 }
4423}
4424EXPORT_SYMBOL(ieee80211_notify_mac);