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Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * BSS client mode implementation
Jouni Malinen5394af42009-01-08 13:31:59 +02003 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
Jiri Bencf0706e82007-05-05 11:45:53 -07004 * 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
Geert Uytterhoeven5b323ed2007-05-08 18:40:27 -070014#include <linux/delay.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070015#include <linux/if_ether.h>
16#include <linux/skbuff.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070017#include <linux/if_arp.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070018#include <linux/etherdevice.h>
Johannes Bergd0709a62008-02-25 16:27:46 +010019#include <linux/rtnetlink.h>
Johannes Berg10f644a2009-04-16 13:17:25 +020020#include <linux/pm_qos_params.h>
Johannes Bergd91f36d2009-04-16 13:17:26 +020021#include <linux/crc32.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070022#include <net/mac80211.h>
Johannes Berg472dbc42008-09-11 00:01:49 +020023#include <asm/unaligned.h>
Johannes Berg60f8b392008-09-08 17:44:22 +020024
Jiri Bencf0706e82007-05-05 11:45:53 -070025#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020026#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040027#include "rate.h"
28#include "led.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070029
30#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31#define IEEE80211_AUTH_MAX_TRIES 3
32#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33#define IEEE80211_ASSOC_MAX_TRIES 3
Maxim Levitskya43abf22009-07-31 18:54:12 +030034#define IEEE80211_MAX_PROBE_TRIES 5
Johannes Bergb291ba12009-07-10 15:29:03 +020035
36/*
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
39 */
40#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
41/*
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
44 */
Maxim Levitskyd1c50912009-07-31 18:54:23 +030045#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
Johannes Bergb291ba12009-07-10 15:29:03 +020046/*
47 * Time we wait for a probe response after sending
48 * a probe request because of beacon loss or for
49 * checking the connection still works.
50 */
Maxim Levitskyd1c50912009-07-31 18:54:23 +030051#define IEEE80211_PROBE_WAIT (HZ / 2)
Jiri Bencf0706e82007-05-05 11:45:53 -070052
Johannes Berg5bb644a2009-05-17 11:40:42 +020053#define TMR_RUNNING_TIMER 0
54#define TMR_RUNNING_CHANSW 1
55
Johannes Berg77fdaa12009-07-07 03:45:17 +020056/*
57 * All cfg80211 functions have to be called outside a locked
58 * section so that they can acquire a lock themselves... This
59 * is much simpler than queuing up things in cfg80211, but we
60 * do need some indirection for that here.
61 */
62enum rx_mgmt_action {
63 /* no action required */
64 RX_MGMT_NONE,
65
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH,
68
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC,
71
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH,
74
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC,
77
78 /* caller must call cfg80211_auth_timeout() & free work */
79 RX_MGMT_CFG80211_AUTH_TO,
80
81 /* caller must call cfg80211_assoc_timeout() & free work */
82 RX_MGMT_CFG80211_ASSOC_TO,
83};
84
Johannes Berg5484e232008-09-08 17:44:27 +020085/* utils */
Johannes Berg77fdaa12009-07-07 03:45:17 +020086static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
87{
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
89}
90
Johannes Bergca386f32009-07-10 02:39:48 +020091/*
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
99 * do that.
100 */
101static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
103{
104 ASSERT_MGD_MTX(ifmgd);
105
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
109}
110
Johannes Bergb291ba12009-07-10 15:29:03 +0200111static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
112{
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
114 return;
115
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
118}
119
Johannes Berg5484e232008-09-08 17:44:27 +0200120static int ecw2cw(int ecw)
Johannes Berg60f8b392008-09-08 17:44:22 +0200121{
Johannes Berg5484e232008-09-08 17:44:27 +0200122 return (1 << ecw) - 1;
Johannes Berg60f8b392008-09-08 17:44:22 +0200123}
124
Johannes Bergc2b13452008-09-11 00:01:55 +0200125static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
Johannes Berg9ac19a92008-09-09 10:57:09 +0200126 struct ieee80211_supported_band *sband,
Johannes Berg881d9482009-01-21 15:13:48 +0100127 u32 *rates)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200128{
129 int i, j, count;
130 *rates = 0;
131 count = 0;
132 for (i = 0; i < bss->supp_rates_len; i++) {
133 int rate = (bss->supp_rates[i] & 0x7F) * 5;
134
135 for (j = 0; j < sband->n_bitrates; j++)
136 if (sband->bitrates[j].bitrate == rate) {
137 *rates |= BIT(j);
138 count++;
139 break;
140 }
141 }
142
143 return count;
144}
145
Johannes Bergd5522e02009-03-30 13:23:35 +0200146/*
147 * ieee80211_enable_ht should be called only after the operating band
148 * has been determined as ht configuration depends on the hw's
149 * HT abilities for a specific band.
150 */
151static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_ht_info *hti,
Johannes Berg77fdaa12009-07-07 03:45:17 +0200153 const u8 *bssid, u16 ap_ht_cap_flags)
Johannes Bergd5522e02009-03-30 13:23:35 +0200154{
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_supported_band *sband;
Johannes Bergd5522e02009-03-30 13:23:35 +0200157 struct sta_info *sta;
158 u32 changed = 0;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200159 u16 ht_opmode;
Johannes Bergd5522e02009-03-30 13:23:35 +0200160 bool enable_ht = true, ht_changed;
161 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
162
163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
164
Johannes Bergd5522e02009-03-30 13:23:35 +0200165 /* HT is not supported */
166 if (!sband->ht_cap.ht_supported)
167 enable_ht = false;
168
169 /* check that channel matches the right operating channel */
170 if (local->hw.conf.channel->center_freq !=
171 ieee80211_channel_to_frequency(hti->control_chan))
172 enable_ht = false;
173
174 if (enable_ht) {
175 channel_type = NL80211_CHAN_HT20;
176
177 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
178 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
179 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
180 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
181 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
Luis R. Rodriguez768777e2009-05-02 00:37:19 -0400182 if (!(local->hw.conf.channel->flags &
183 IEEE80211_CHAN_NO_HT40PLUS))
184 channel_type = NL80211_CHAN_HT40PLUS;
Johannes Bergd5522e02009-03-30 13:23:35 +0200185 break;
186 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
Luis R. Rodriguez768777e2009-05-02 00:37:19 -0400187 if (!(local->hw.conf.channel->flags &
188 IEEE80211_CHAN_NO_HT40MINUS))
189 channel_type = NL80211_CHAN_HT40MINUS;
Johannes Bergd5522e02009-03-30 13:23:35 +0200190 break;
191 }
192 }
193 }
194
195 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
196 channel_type != local->hw.conf.channel_type;
197
198 local->oper_channel_type = channel_type;
199
200 if (ht_changed) {
201 /* channel_type change automatically detected */
202 ieee80211_hw_config(local, 0);
203
204 rcu_read_lock();
Johannes Berg77fdaa12009-07-07 03:45:17 +0200205 sta = sta_info_get(local, bssid);
Johannes Bergd5522e02009-03-30 13:23:35 +0200206 if (sta)
207 rate_control_rate_update(local, sband, sta,
208 IEEE80211_RC_HT_CHANGED);
Johannes Bergd5522e02009-03-30 13:23:35 +0200209 rcu_read_unlock();
Johannes Bergd5522e02009-03-30 13:23:35 +0200210 }
211
212 /* disable HT */
213 if (!enable_ht)
214 return 0;
215
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200216 ht_opmode = le16_to_cpu(hti->operation_mode);
Johannes Bergd5522e02009-03-30 13:23:35 +0200217
218 /* if bss configuration changed store the new one */
Johannes Berg413ad502009-05-08 21:21:06 +0200219 if (!sdata->ht_opmode_valid ||
220 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
Johannes Bergd5522e02009-03-30 13:23:35 +0200221 changed |= BSS_CHANGED_HT;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200222 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
Johannes Berg413ad502009-05-08 21:21:06 +0200223 sdata->ht_opmode_valid = true;
Johannes Bergd5522e02009-03-30 13:23:35 +0200224 }
225
226 return changed;
227}
228
Johannes Berg9c6bd792008-09-11 00:01:52 +0200229/* frame sending functions */
230
Johannes Berg77fdaa12009-07-07 03:45:17 +0200231static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
232 struct ieee80211_mgd_work *wk)
Johannes Berg60f8b392008-09-08 17:44:22 +0200233{
Johannes Berg46900292009-02-15 12:44:28 +0100234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200235 struct ieee80211_local *local = sdata->local;
236 struct sk_buff *skb;
237 struct ieee80211_mgmt *mgmt;
Johannes Berg517357c2009-07-02 17:18:40 +0200238 u8 *pos;
239 const u8 *ies, *ht_ie;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200242 int wmm = 0;
243 struct ieee80211_supported_band *sband;
Johannes Berg881d9482009-01-21 15:13:48 +0100244 u32 rates = 0;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200245
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Johannes Berg77fdaa12009-07-07 03:45:17 +0200247 sizeof(*mgmt) + 200 + wk->ie_len +
248 wk->ssid_len);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200249 if (!skb) {
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
252 return;
253 }
254 skb_reserve(skb, local->hw.extra_tx_headroom);
255
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
257
Johannes Berg46900292009-02-15 12:44:28 +0100258 capab = ifmgd->capab;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200259
260 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
261 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
262 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
263 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
264 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
265 }
266
Johannes Berg77fdaa12009-07-07 03:45:17 +0200267 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
268 capab |= WLAN_CAPABILITY_PRIVACY;
269 if (wk->bss->wmm_used)
270 wmm = 1;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200271
Johannes Berg77fdaa12009-07-07 03:45:17 +0200272 /* get all rates supported by the device and the AP as
273 * some APs don't like getting a superset of their rates
274 * in the association request (e.g. D-Link DAP 1353 in
275 * b-only mode) */
276 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200277
Johannes Berg77fdaa12009-07-07 03:45:17 +0200278 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
279 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
280 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200281
282 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
283 memset(mgmt, 0, 24);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200284 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200285 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200286 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200287
Johannes Berg77fdaa12009-07-07 03:45:17 +0200288 if (!is_zero_ether_addr(wk->prev_bssid)) {
Johannes Berg9ac19a92008-09-09 10:57:09 +0200289 skb_put(skb, 10);
290 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
291 IEEE80211_STYPE_REASSOC_REQ);
292 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
293 mgmt->u.reassoc_req.listen_interval =
294 cpu_to_le16(local->hw.conf.listen_interval);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200295 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
Johannes Berg9ac19a92008-09-09 10:57:09 +0200296 ETH_ALEN);
297 } else {
298 skb_put(skb, 4);
299 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
300 IEEE80211_STYPE_ASSOC_REQ);
301 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
Rami Rosen13554122008-12-16 22:38:29 +0200302 mgmt->u.assoc_req.listen_interval =
Johannes Berg9ac19a92008-09-09 10:57:09 +0200303 cpu_to_le16(local->hw.conf.listen_interval);
304 }
305
306 /* SSID */
Johannes Berg77fdaa12009-07-07 03:45:17 +0200307 ies = pos = skb_put(skb, 2 + wk->ssid_len);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200308 *pos++ = WLAN_EID_SSID;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200309 *pos++ = wk->ssid_len;
310 memcpy(pos, wk->ssid, wk->ssid_len);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200311
312 /* add all rates which were marked to be used above */
313 supp_rates_len = rates_len;
314 if (supp_rates_len > 8)
315 supp_rates_len = 8;
316
317 len = sband->n_bitrates;
318 pos = skb_put(skb, supp_rates_len + 2);
319 *pos++ = WLAN_EID_SUPP_RATES;
320 *pos++ = supp_rates_len;
321
322 count = 0;
323 for (i = 0; i < sband->n_bitrates; i++) {
324 if (BIT(i) & rates) {
325 int rate = sband->bitrates[i].bitrate;
326 *pos++ = (u8) (rate / 5);
327 if (++count == 8)
328 break;
329 }
330 }
331
332 if (rates_len > count) {
333 pos = skb_put(skb, rates_len - count + 2);
334 *pos++ = WLAN_EID_EXT_SUPP_RATES;
335 *pos++ = rates_len - count;
336
337 for (i++; i < sband->n_bitrates; i++) {
338 if (BIT(i) & rates) {
339 int rate = sband->bitrates[i].bitrate;
340 *pos++ = (u8) (rate / 5);
341 }
342 }
343 }
344
345 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
346 /* 1. power capabilities */
347 pos = skb_put(skb, 4);
348 *pos++ = WLAN_EID_PWR_CAPABILITY;
349 *pos++ = 2;
350 *pos++ = 0; /* min tx power */
351 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
352
353 /* 2. supported channels */
354 /* TODO: get this in reg domain format */
355 pos = skb_put(skb, 2 * sband->n_channels + 2);
356 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
357 *pos++ = 2 * sband->n_channels;
358 for (i = 0; i < sband->n_channels; i++) {
359 *pos++ = ieee80211_frequency_to_channel(
360 sband->channels[i].center_freq);
361 *pos++ = 1; /* one channel in the subband*/
362 }
363 }
364
Johannes Berg77fdaa12009-07-07 03:45:17 +0200365 if (wk->ie_len && wk->ie) {
366 pos = skb_put(skb, wk->ie_len);
367 memcpy(pos, wk->ie, wk->ie_len);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200368 }
369
Johannes Berg46900292009-02-15 12:44:28 +0100370 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
Johannes Berg9ac19a92008-09-09 10:57:09 +0200371 pos = skb_put(skb, 9);
372 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
373 *pos++ = 7; /* len */
374 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
375 *pos++ = 0x50;
376 *pos++ = 0xf2;
377 *pos++ = 2; /* WME */
378 *pos++ = 0; /* WME info */
379 *pos++ = 1; /* WME ver */
380 *pos++ = 0;
381 }
382
383 /* wmm support is a must to HT */
Vasanthakumar Thiagarajaneb469362008-12-23 21:30:50 +0530384 /*
385 * IEEE802.11n does not allow TKIP/WEP as pairwise
386 * ciphers in HT mode. We still associate in non-ht
387 * mode (11a/b/g) if any one of these ciphers is
388 * configured as pairwise.
389 */
Johannes Berg46900292009-02-15 12:44:28 +0100390 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200391 sband->ht_cap.ht_supported &&
Johannes Berg77fdaa12009-07-07 03:45:17 +0200392 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
Vasanthakumar Thiagarajaneb469362008-12-23 21:30:50 +0530393 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
Johannes Bergab1faea2009-07-01 21:41:17 +0200394 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200395 struct ieee80211_ht_info *ht_info =
396 (struct ieee80211_ht_info *)(ht_ie + 2);
397 u16 cap = sband->ht_cap.cap;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200398 __le16 tmp;
399 u32 flags = local->hw.conf.channel->flags;
400
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200401 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
402 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -0400403 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200404 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200405 cap &= ~IEEE80211_HT_CAP_SGI_40;
406 }
407 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200408 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -0400409 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200410 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200411 cap &= ~IEEE80211_HT_CAP_SGI_40;
412 }
413 break;
414 }
415
416 tmp = cpu_to_le16(cap);
417 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
418 *pos++ = WLAN_EID_HT_CAPABILITY;
419 *pos++ = sizeof(struct ieee80211_ht_cap);
420 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
421 memcpy(pos, &tmp, sizeof(u16));
422 pos += sizeof(u16);
423 /* TODO: needs a define here for << 2 */
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200424 *pos++ = sband->ht_cap.ampdu_factor |
425 (sband->ht_cap.ampdu_density << 2);
426 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
Johannes Berg9ac19a92008-09-09 10:57:09 +0200427 }
428
Johannes Berg62ae67b2009-11-18 18:42:05 +0100429 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
430 ieee80211_tx_skb(sdata, skb);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200431}
432
433
Johannes Bergef422bc2008-09-09 10:58:25 +0200434static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503dd2009-07-07 03:56:11 +0200435 const u8 *bssid, u16 stype, u16 reason,
436 void *cookie)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200437{
438 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200440 struct sk_buff *skb;
441 struct ieee80211_mgmt *mgmt;
442
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200443 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
Johannes Berg9ac19a92008-09-09 10:57:09 +0200444 if (!skb) {
Johannes Bergef422bc2008-09-09 10:58:25 +0200445 printk(KERN_DEBUG "%s: failed to allocate buffer for "
446 "deauth/disassoc frame\n", sdata->dev->name);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200447 return;
448 }
449 skb_reserve(skb, local->hw.extra_tx_headroom);
450
451 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
452 memset(mgmt, 0, 24);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200453 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200454 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200455 memcpy(mgmt->bssid, bssid, ETH_ALEN);
Johannes Bergef422bc2008-09-09 10:58:25 +0200456 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200457 skb_put(skb, 2);
Johannes Bergef422bc2008-09-09 10:58:25 +0200458 /* u.deauth.reason_code == u.disassoc.reason_code */
Johannes Berg9ac19a92008-09-09 10:57:09 +0200459 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
460
Jouni Malinen53b46b82009-03-27 20:53:56 +0200461 if (stype == IEEE80211_STYPE_DEAUTH)
Holger Schurigce470612009-10-13 13:28:13 +0200462 if (cookie)
463 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
464 else
465 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Jouni Malinen53b46b82009-03-27 20:53:56 +0200466 else
Holger Schurigce470612009-10-13 13:28:13 +0200467 if (cookie)
468 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
469 else
470 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg62ae67b2009-11-18 18:42:05 +0100471 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
472 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
473 ieee80211_tx_skb(sdata, skb);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200474}
475
Kalle Valo572e0012009-02-10 17:09:31 +0200476void ieee80211_send_pspoll(struct ieee80211_local *local,
477 struct ieee80211_sub_if_data *sdata)
478{
Johannes Berg46900292009-02-15 12:44:28 +0100479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Kalle Valo572e0012009-02-10 17:09:31 +0200480 struct ieee80211_pspoll *pspoll;
481 struct sk_buff *skb;
482 u16 fc;
483
484 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
485 if (!skb) {
486 printk(KERN_DEBUG "%s: failed to allocate buffer for "
487 "pspoll frame\n", sdata->dev->name);
488 return;
489 }
490 skb_reserve(skb, local->hw.extra_tx_headroom);
491
492 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
493 memset(pspoll, 0, sizeof(*pspoll));
494 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
495 pspoll->frame_control = cpu_to_le16(fc);
Johannes Berg46900292009-02-15 12:44:28 +0100496 pspoll->aid = cpu_to_le16(ifmgd->aid);
Kalle Valo572e0012009-02-10 17:09:31 +0200497
498 /* aid in PS-Poll has its two MSBs each set to 1 */
499 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
500
Johannes Berg46900292009-02-15 12:44:28 +0100501 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
Kalle Valo572e0012009-02-10 17:09:31 +0200502 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
503
Johannes Berg62ae67b2009-11-18 18:42:05 +0100504 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
505 ieee80211_tx_skb(sdata, skb);
Kalle Valo572e0012009-02-10 17:09:31 +0200506}
507
Johannes Berg965beda2009-04-16 13:17:24 +0200508void ieee80211_send_nullfunc(struct ieee80211_local *local,
509 struct ieee80211_sub_if_data *sdata,
510 int powersave)
511{
512 struct sk_buff *skb;
513 struct ieee80211_hdr *nullfunc;
514 __le16 fc;
515
516 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
517 return;
518
519 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
520 if (!skb) {
521 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
522 "frame\n", sdata->dev->name);
523 return;
524 }
525 skb_reserve(skb, local->hw.extra_tx_headroom);
526
527 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
528 memset(nullfunc, 0, 24);
529 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
530 IEEE80211_FCTL_TODS);
531 if (powersave)
532 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
533 nullfunc->frame_control = fc;
534 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
535 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
536 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
537
Johannes Berg62ae67b2009-11-18 18:42:05 +0100538 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
539 ieee80211_tx_skb(sdata, skb);
Johannes Berg965beda2009-04-16 13:17:24 +0200540}
541
Johannes Bergcc32abd2009-05-15 11:52:31 +0200542/* spectrum management related things */
543static void ieee80211_chswitch_work(struct work_struct *work)
544{
545 struct ieee80211_sub_if_data *sdata =
546 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
548
549 if (!netif_running(sdata->dev))
550 return;
551
Johannes Berg77fdaa12009-07-07 03:45:17 +0200552 mutex_lock(&ifmgd->mtx);
553 if (!ifmgd->associated)
554 goto out;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200555
556 sdata->local->oper_channel = sdata->local->csa_channel;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200557 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200558
Johannes Berg77fdaa12009-07-07 03:45:17 +0200559 /* XXX: shouldn't really modify cfg80211-owned data! */
560 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
561
Johannes Bergcc32abd2009-05-15 11:52:31 +0200562 ieee80211_wake_queues_by_reason(&sdata->local->hw,
563 IEEE80211_QUEUE_STOP_REASON_CSA);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200564 out:
565 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
566 mutex_unlock(&ifmgd->mtx);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200567}
568
569static void ieee80211_chswitch_timer(unsigned long data)
570{
571 struct ieee80211_sub_if_data *sdata =
572 (struct ieee80211_sub_if_data *) data;
573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
574
Johannes Berg5bb644a2009-05-17 11:40:42 +0200575 if (sdata->local->quiescing) {
576 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
577 return;
578 }
579
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400580 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200581}
582
583void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
584 struct ieee80211_channel_sw_ie *sw_elem,
585 struct ieee80211_bss *bss)
586{
587 struct ieee80211_channel *new_ch;
588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
589 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
590
Johannes Berg77fdaa12009-07-07 03:45:17 +0200591 ASSERT_MGD_MTX(ifmgd);
592
593 if (!ifmgd->associated)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200594 return;
595
Helmut Schaafbe9c422009-07-23 12:14:04 +0200596 if (sdata->local->scanning)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200597 return;
598
599 /* Disregard subsequent beacons if we are already running a timer
600 processing a CSA */
601
602 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
603 return;
604
605 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
606 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
607 return;
608
609 sdata->local->csa_channel = new_ch;
610
611 if (sw_elem->count <= 1) {
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400612 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200613 } else {
614 ieee80211_stop_queues_by_reason(&sdata->local->hw,
615 IEEE80211_QUEUE_STOP_REASON_CSA);
616 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
617 mod_timer(&ifmgd->chswitch_timer,
618 jiffies +
619 msecs_to_jiffies(sw_elem->count *
620 bss->cbss.beacon_interval));
621 }
622}
623
624static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
625 u16 capab_info, u8 *pwr_constr_elem,
626 u8 pwr_constr_elem_len)
627{
628 struct ieee80211_conf *conf = &sdata->local->hw.conf;
629
630 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
631 return;
632
633 /* Power constraint IE length should be 1 octet */
634 if (pwr_constr_elem_len != 1)
635 return;
636
637 if ((*pwr_constr_elem <= conf->channel->max_power) &&
638 (*pwr_constr_elem != sdata->local->power_constr_level)) {
639 sdata->local->power_constr_level = *pwr_constr_elem;
640 ieee80211_hw_config(sdata->local, 0);
641 }
642}
643
Johannes Berg965beda2009-04-16 13:17:24 +0200644/* powersave */
645static void ieee80211_enable_ps(struct ieee80211_local *local,
646 struct ieee80211_sub_if_data *sdata)
647{
648 struct ieee80211_conf *conf = &local->hw.conf;
649
Johannes Bergd5edaed2009-04-22 23:02:51 +0200650 /*
651 * If we are scanning right now then the parameters will
652 * take effect when scan finishes.
653 */
Helmut Schaafbe9c422009-07-23 12:14:04 +0200654 if (local->scanning)
Johannes Bergd5edaed2009-04-22 23:02:51 +0200655 return;
656
Johannes Berg965beda2009-04-16 13:17:24 +0200657 if (conf->dynamic_ps_timeout > 0 &&
658 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
659 mod_timer(&local->dynamic_ps_timer, jiffies +
660 msecs_to_jiffies(conf->dynamic_ps_timeout));
661 } else {
662 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
663 ieee80211_send_nullfunc(local, sdata, 1);
664 conf->flags |= IEEE80211_CONF_PS;
665 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
666 }
667}
668
669static void ieee80211_change_ps(struct ieee80211_local *local)
670{
671 struct ieee80211_conf *conf = &local->hw.conf;
672
673 if (local->ps_sdata) {
Johannes Berg965beda2009-04-16 13:17:24 +0200674 ieee80211_enable_ps(local, local->ps_sdata);
675 } else if (conf->flags & IEEE80211_CONF_PS) {
676 conf->flags &= ~IEEE80211_CONF_PS;
677 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
678 del_timer_sync(&local->dynamic_ps_timer);
679 cancel_work_sync(&local->dynamic_ps_enable_work);
680 }
681}
682
683/* need to hold RTNL or interface lock */
Johannes Berg10f644a2009-04-16 13:17:25 +0200684void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
Johannes Berg965beda2009-04-16 13:17:24 +0200685{
686 struct ieee80211_sub_if_data *sdata, *found = NULL;
687 int count = 0;
688
689 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
690 local->ps_sdata = NULL;
691 return;
692 }
693
694 list_for_each_entry(sdata, &local->interfaces, list) {
695 if (!netif_running(sdata->dev))
696 continue;
697 if (sdata->vif.type != NL80211_IFTYPE_STATION)
698 continue;
699 found = sdata;
700 count++;
701 }
702
Luis R. Rodriguez43f78532009-06-10 15:16:15 +0200703 if (count == 1 && found->u.mgd.powersave &&
Johannes Berg77fdaa12009-07-07 03:45:17 +0200704 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
Johannes Bergb291ba12009-07-10 15:29:03 +0200705 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
706 IEEE80211_STA_CONNECTION_POLL))) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200707 s32 beaconint_us;
708
709 if (latency < 0)
710 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
711
712 beaconint_us = ieee80211_tu_to_usec(
713 found->vif.bss_conf.beacon_int);
714
Johannes Berg04fe2032009-04-22 18:44:37 +0200715 if (beaconint_us > latency) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200716 local->ps_sdata = NULL;
Johannes Berg04fe2032009-04-22 18:44:37 +0200717 } else {
718 u8 dtimper = found->vif.bss_conf.dtim_period;
719 int maxslp = 1;
720
721 if (dtimper > 1)
722 maxslp = min_t(int, dtimper,
723 latency / beaconint_us);
724
Johannes Berg9ccebe62009-04-23 10:32:36 +0200725 local->hw.conf.max_sleep_period = maxslp;
Johannes Berg10f644a2009-04-16 13:17:25 +0200726 local->ps_sdata = found;
Johannes Berg04fe2032009-04-22 18:44:37 +0200727 }
Johannes Berg10f644a2009-04-16 13:17:25 +0200728 } else {
Johannes Berg965beda2009-04-16 13:17:24 +0200729 local->ps_sdata = NULL;
Johannes Berg10f644a2009-04-16 13:17:25 +0200730 }
Johannes Berg965beda2009-04-16 13:17:24 +0200731
732 ieee80211_change_ps(local);
733}
734
735void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
736{
737 struct ieee80211_local *local =
738 container_of(work, struct ieee80211_local,
739 dynamic_ps_disable_work);
740
741 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
742 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
743 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
744 }
745
746 ieee80211_wake_queues_by_reason(&local->hw,
747 IEEE80211_QUEUE_STOP_REASON_PS);
748}
749
750void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
751{
752 struct ieee80211_local *local =
753 container_of(work, struct ieee80211_local,
754 dynamic_ps_enable_work);
755 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
756
757 /* can only happen when PS was just disabled anyway */
758 if (!sdata)
759 return;
760
761 if (local->hw.conf.flags & IEEE80211_CONF_PS)
762 return;
763
764 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
765 ieee80211_send_nullfunc(local, sdata, 1);
766
767 local->hw.conf.flags |= IEEE80211_CONF_PS;
768 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
769}
770
771void ieee80211_dynamic_ps_timer(unsigned long data)
772{
773 struct ieee80211_local *local = (void *) data;
774
Luis R. Rodriguez78f1a8b2009-07-27 08:38:25 -0700775 if (local->quiescing || local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +0200776 return;
777
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400778 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
Johannes Berg965beda2009-04-16 13:17:24 +0200779}
780
Johannes Berg60f8b392008-09-08 17:44:22 +0200781/* MLME */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200782static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Johannes Berg46900292009-02-15 12:44:28 +0100783 struct ieee80211_if_managed *ifmgd,
Jiri Bencf0706e82007-05-05 11:45:53 -0700784 u8 *wmm_param, size_t wmm_param_len)
785{
Jiri Bencf0706e82007-05-05 11:45:53 -0700786 struct ieee80211_tx_queue_params params;
787 size_t left;
788 int count;
789 u8 *pos;
790
Johannes Berg46900292009-02-15 12:44:28 +0100791 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
Johannes Berg3434fbd2008-05-03 00:59:37 +0200792 return;
793
794 if (!wmm_param)
795 return;
796
Jiri Bencf0706e82007-05-05 11:45:53 -0700797 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
798 return;
799 count = wmm_param[6] & 0x0f;
Johannes Berg46900292009-02-15 12:44:28 +0100800 if (count == ifmgd->wmm_last_param_set)
Jiri Bencf0706e82007-05-05 11:45:53 -0700801 return;
Johannes Berg46900292009-02-15 12:44:28 +0100802 ifmgd->wmm_last_param_set = count;
Jiri Bencf0706e82007-05-05 11:45:53 -0700803
804 pos = wmm_param + 8;
805 left = wmm_param_len - 8;
806
807 memset(&params, 0, sizeof(params));
808
Jiri Bencf0706e82007-05-05 11:45:53 -0700809 local->wmm_acm = 0;
810 for (; left >= 4; left -= 4, pos += 4) {
811 int aci = (pos[0] >> 5) & 0x03;
812 int acm = (pos[0] >> 4) & 0x01;
813 int queue;
814
815 switch (aci) {
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200816 case 1: /* AC_BK */
Johannes Berge100bb62008-04-30 18:51:21 +0200817 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200818 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200819 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
Jiri Bencf0706e82007-05-05 11:45:53 -0700820 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200821 case 2: /* AC_VI */
Johannes Berge100bb62008-04-30 18:51:21 +0200822 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200823 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200824 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
Jiri Bencf0706e82007-05-05 11:45:53 -0700825 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200826 case 3: /* AC_VO */
Johannes Berge100bb62008-04-30 18:51:21 +0200827 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200828 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200829 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
Jiri Bencf0706e82007-05-05 11:45:53 -0700830 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200831 case 0: /* AC_BE */
Jiri Bencf0706e82007-05-05 11:45:53 -0700832 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200833 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200834 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200835 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
Jiri Bencf0706e82007-05-05 11:45:53 -0700836 break;
837 }
838
839 params.aifs = pos[0] & 0x0f;
840 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
841 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200842 params.txop = get_unaligned_le16(pos + 2);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200843#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700844 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Johannes Berg3330d7b2008-02-10 16:49:38 +0100845 "cWmin=%d cWmax=%d txop=%d\n",
Johannes Berg0bffe402009-06-09 16:18:32 +0200846 wiphy_name(local->hw.wiphy), queue, aci, acm,
847 params.aifs, params.cw_min, params.cw_max, params.txop);
Johannes Berg3330d7b2008-02-10 16:49:38 +0100848#endif
Johannes Berg24487982009-04-23 18:52:52 +0200849 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
Jiri Bencf0706e82007-05-05 11:45:53 -0700850 printk(KERN_DEBUG "%s: failed to set TX queue "
Johannes Berg0bffe402009-06-09 16:18:32 +0200851 "parameters for queue %d\n",
852 wiphy_name(local->hw.wiphy), queue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700853 }
854}
855
Johannes Berg7a5158e2008-10-08 10:59:33 +0200856static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
857 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +0200858{
Johannes Bergbda39332008-10-11 01:51:51 +0200859 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100860 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200861 bool use_protection;
862 bool use_short_preamble;
863 bool use_short_slot;
864
865 if (erp_valid) {
866 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
867 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
868 } else {
869 use_protection = false;
870 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
871 }
872
873 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Daniel Drake56282212007-07-10 19:32:10 +0200874
Johannes Berg471b3ef2007-12-28 14:32:58 +0100875 if (use_protection != bss_conf->use_cts_prot) {
Johannes Berg471b3ef2007-12-28 14:32:58 +0100876 bss_conf->use_cts_prot = use_protection;
877 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200878 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200879
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200880 if (use_short_preamble != bss_conf->use_short_preamble) {
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200881 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100882 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200883 }
Daniel Draked9430a32007-07-27 15:43:24 +0200884
Johannes Berg7a5158e2008-10-08 10:59:33 +0200885 if (use_short_slot != bss_conf->use_short_slot) {
Johannes Berg7a5158e2008-10-08 10:59:33 +0200886 bss_conf->use_short_slot = use_short_slot;
887 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -0400888 }
889
890 return changed;
891}
892
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200893static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Berge21546a2009-08-06 20:41:32 +0200894 struct ieee80211_mgd_work *wk,
Johannes Bergae5eb022008-10-14 16:58:37 +0200895 u32 bss_info_changed)
Jiri Bencf0706e82007-05-05 11:45:53 -0700896{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100897 struct ieee80211_local *local = sdata->local;
Johannes Berge21546a2009-08-06 20:41:32 +0200898 struct ieee80211_bss *bss = wk->bss;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400899
Johannes Bergae5eb022008-10-14 16:58:37 +0200900 bss_info_changed |= BSS_CHANGED_ASSOC;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200901 /* set timing information */
902 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
903 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
904 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400905
Johannes Berg77fdaa12009-07-07 03:45:17 +0200906 bss_info_changed |= BSS_CHANGED_BEACON_INT;
907 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
908 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700909
Johannes Berg77fdaa12009-07-07 03:45:17 +0200910 sdata->u.mgd.associated = bss;
Johannes Berge21546a2009-08-06 20:41:32 +0200911 sdata->u.mgd.old_associate_work = wk;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200912 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
Johannes Berg471b3ef2007-12-28 14:32:58 +0100913
Johannes Bergb291ba12009-07-10 15:29:03 +0200914 /* just to be sure */
915 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
916 IEEE80211_STA_BEACON_POLL);
917
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200918 ieee80211_led_assoc(local, 1);
919
Johannes Bergbda39332008-10-11 01:51:51 +0200920 sdata->vif.bss_conf.assoc = 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200921 /*
922 * For now just always ask the driver to update the basic rateset
923 * when we have associated, we aren't checking whether it actually
924 * changed or not.
925 */
Johannes Bergae5eb022008-10-14 16:58:37 +0200926 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
Johannes Berg9cef8732009-05-14 13:10:14 +0200927
928 /* And the BSSID changed - we're associated now */
929 bss_info_changed |= BSS_CHANGED_BSSID;
930
Johannes Bergae5eb022008-10-14 16:58:37 +0200931 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300932
Johannes Berg056508d2009-07-30 21:43:55 +0200933 mutex_lock(&local->iflist_mtx);
934 ieee80211_recalc_ps(local, -1);
935 mutex_unlock(&local->iflist_mtx);
Kalle Valoe0cb6862008-12-18 23:35:13 +0200936
John W. Linville53623f12009-10-15 15:10:16 -0400937 netif_start_queue(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200938 netif_carrier_on(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700939}
940
Johannes Berg77fdaa12009-07-07 03:45:17 +0200941static enum rx_mgmt_action __must_check
942ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
943 struct ieee80211_mgd_work *wk)
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300944{
Johannes Berg46900292009-02-15 12:44:28 +0100945 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Helmut Schaa11432372009-03-12 14:04:34 +0100946 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100947
Johannes Berg77fdaa12009-07-07 03:45:17 +0200948 wk->tries++;
949 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700950 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
Johannes Berg77fdaa12009-07-07 03:45:17 +0200951 sdata->dev->name, wk->bss->cbss.bssid);
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530952
953 /*
954 * Most likely AP is not in the range so remove the
Johannes Berg77fdaa12009-07-07 03:45:17 +0200955 * bss struct for that AP.
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530956 */
Johannes Berg77fdaa12009-07-07 03:45:17 +0200957 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
Helmut Schaa11432372009-03-12 14:04:34 +0100958
959 /*
960 * We might have a pending scan which had no chance to run yet
Johannes Berg77fdaa12009-07-07 03:45:17 +0200961 * due to work needing to be done. Hence, queue the STAs work
962 * again for that.
Helmut Schaa11432372009-03-12 14:04:34 +0100963 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400964 ieee80211_queue_work(&local->hw, &ifmgd->work);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200965 return RX_MGMT_CFG80211_AUTH_TO;
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300966 }
967
Johannes Berg77fdaa12009-07-07 03:45:17 +0200968 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
969 sdata->dev->name, wk->bss->cbss.bssid,
970 wk->tries);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300971
Johannes Berg77fdaa12009-07-07 03:45:17 +0200972 /*
973 * Direct probe is sent to broadcast address as some APs
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300974 * will not answer to direct packet in unassociated state.
975 */
Johannes Berg77fdaa12009-07-07 03:45:17 +0200976 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300977
Johannes Berg77fdaa12009-07-07 03:45:17 +0200978 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
Johannes Bergca386f32009-07-10 02:39:48 +0200979 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200980
981 return RX_MGMT_NONE;
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300982}
983
Jiri Bencf0706e82007-05-05 11:45:53 -0700984
Johannes Berg77fdaa12009-07-07 03:45:17 +0200985static enum rx_mgmt_action __must_check
986ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
987 struct ieee80211_mgd_work *wk)
Jiri Bencf0706e82007-05-05 11:45:53 -0700988{
Johannes Berg46900292009-02-15 12:44:28 +0100989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Helmut Schaa11432372009-03-12 14:04:34 +0100990 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100991
Johannes Berg77fdaa12009-07-07 03:45:17 +0200992 wk->tries++;
993 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700994 printk(KERN_DEBUG "%s: authentication with AP %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -0700995 " timed out\n",
Johannes Berg77fdaa12009-07-07 03:45:17 +0200996 sdata->dev->name, wk->bss->cbss.bssid);
997
998 /*
999 * Most likely AP is not in the range so remove the
1000 * bss struct for that AP.
1001 */
1002 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
Helmut Schaa11432372009-03-12 14:04:34 +01001003
1004 /*
1005 * We might have a pending scan which had no chance to run yet
Johannes Berg77fdaa12009-07-07 03:45:17 +02001006 * due to work needing to be done. Hence, queue the STAs work
1007 * again for that.
Helmut Schaa11432372009-03-12 14:04:34 +01001008 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001009 ieee80211_queue_work(&local->hw, &ifmgd->work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001010 return RX_MGMT_CFG80211_AUTH_TO;
Jiri Bencf0706e82007-05-05 11:45:53 -07001011 }
1012
Johannes Berg77fdaa12009-07-07 03:45:17 +02001013 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1014 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
Jiri Bencf0706e82007-05-05 11:45:53 -07001015
Johannes Berg77fdaa12009-07-07 03:45:17 +02001016 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
Johannes Bergfffd0932009-07-08 14:22:54 +02001017 wk->bss->cbss.bssid, NULL, 0, 0);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001018 wk->auth_transaction = 2;
Jiri Bencf0706e82007-05-05 11:45:53 -07001019
Johannes Berg77fdaa12009-07-07 03:45:17 +02001020 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
Johannes Bergca386f32009-07-10 02:39:48 +02001021 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001022
1023 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001024}
1025
Johannes Berge21546a2009-08-06 20:41:32 +02001026static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1027 bool deauth)
Tomas Winkleraa458d12008-09-09 00:32:12 +03001028{
Johannes Berg46900292009-02-15 12:44:28 +01001029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Tomas Winkleraa458d12008-09-09 00:32:12 +03001030 struct ieee80211_local *local = sdata->local;
1031 struct sta_info *sta;
Kalle Valoe0cb6862008-12-18 23:35:13 +02001032 u32 changed = 0, config_changed = 0;
Johannes Bergb291ba12009-07-10 15:29:03 +02001033 u8 bssid[ETH_ALEN];
Tomas Winkleraa458d12008-09-09 00:32:12 +03001034
Johannes Berg77fdaa12009-07-07 03:45:17 +02001035 ASSERT_MGD_MTX(ifmgd);
1036
Johannes Bergb291ba12009-07-10 15:29:03 +02001037 if (WARN_ON(!ifmgd->associated))
1038 return;
1039
1040 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1041
Johannes Berg77fdaa12009-07-07 03:45:17 +02001042 ifmgd->associated = NULL;
1043 memset(ifmgd->bssid, 0, ETH_ALEN);
1044
Johannes Berge21546a2009-08-06 20:41:32 +02001045 if (deauth) {
1046 kfree(ifmgd->old_associate_work);
1047 ifmgd->old_associate_work = NULL;
1048 } else {
1049 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1050
1051 wk->state = IEEE80211_MGD_STATE_IDLE;
1052 list_add(&wk->list, &ifmgd->work_list);
1053 }
1054
Johannes Berg77fdaa12009-07-07 03:45:17 +02001055 /*
1056 * we need to commit the associated = NULL change because the
1057 * scan code uses that to determine whether this iface should
1058 * go to/wake up from powersave or not -- and could otherwise
1059 * wake the queues erroneously.
1060 */
1061 smp_mb();
1062
1063 /*
1064 * Thus, we can only afterwards stop the queues -- to account
1065 * for the case where another CPU is finishing a scan at this
1066 * time -- we don't want the scan code to enable queues.
1067 */
Tomas Winkleraa458d12008-09-09 00:32:12 +03001068
John W. Linville53623f12009-10-15 15:10:16 -04001069 netif_stop_queue(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001070 netif_carrier_off(sdata->dev);
1071
Johannes Berg1fa6f4a2009-06-15 18:13:58 +02001072 rcu_read_lock();
Johannes Berg77fdaa12009-07-07 03:45:17 +02001073 sta = sta_info_get(local, bssid);
Johannes Berg1fa6f4a2009-06-15 18:13:58 +02001074 if (sta)
1075 ieee80211_sta_tear_down_BA_sessions(sta);
1076 rcu_read_unlock();
Tomas Winkleraa458d12008-09-09 00:32:12 +03001077
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001078 changed |= ieee80211_reset_erp_info(sdata);
1079
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001080 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +02001081 changed |= BSS_CHANGED_ASSOC;
1082 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001083
Johannes Bergaa837e12009-05-07 16:16:24 +02001084 ieee80211_set_wmm_default(sdata);
1085
Johannes Berg5cff20e2009-04-29 12:26:17 +02001086 ieee80211_recalc_idle(local);
1087
Johannes Berg47979382009-01-07 10:13:27 +01001088 /* channel(_type) changes are handled by ieee80211_hw_config */
Sujith094d05d2008-12-12 11:57:43 +05301089 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +02001090
Johannes Berg413ad502009-05-08 21:21:06 +02001091 /* on the next assoc, re-program HT parameters */
1092 sdata->ht_opmode_valid = false;
1093
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301094 local->power_constr_level = 0;
1095
Kalle Valo520eb822008-12-18 23:35:27 +02001096 del_timer_sync(&local->dynamic_ps_timer);
1097 cancel_work_sync(&local->dynamic_ps_enable_work);
1098
Kalle Valoe0cb6862008-12-18 23:35:13 +02001099 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1100 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1101 config_changed |= IEEE80211_CONF_CHANGE_PS;
1102 }
1103
1104 ieee80211_hw_config(local, config_changed);
Johannes Berg9cef8732009-05-14 13:10:14 +02001105
1106 /* And the BSSID changed -- not very interesting here */
1107 changed |= BSS_CHANGED_BSSID;
Johannes Bergae5eb022008-10-14 16:58:37 +02001108 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +02001109
1110 rcu_read_lock();
1111
Johannes Berg77fdaa12009-07-07 03:45:17 +02001112 sta = sta_info_get(local, bssid);
Tomas Winkler8e268e42008-11-25 13:05:44 +02001113 if (!sta) {
1114 rcu_read_unlock();
1115 return;
1116 }
1117
1118 sta_info_unlink(&sta);
1119
1120 rcu_read_unlock();
1121
1122 sta_info_destroy(sta);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001123}
Jiri Bencf0706e82007-05-05 11:45:53 -07001124
Johannes Berg77fdaa12009-07-07 03:45:17 +02001125static enum rx_mgmt_action __must_check
1126ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1127 struct ieee80211_mgd_work *wk)
Jiri Bencf0706e82007-05-05 11:45:53 -07001128{
Johannes Berg46900292009-02-15 12:44:28 +01001129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Helmut Schaa11432372009-03-12 14:04:34 +01001130 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001131
Johannes Berg77fdaa12009-07-07 03:45:17 +02001132 wk->tries++;
1133 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -07001134 printk(KERN_DEBUG "%s: association with AP %pM"
Jiri Bencf0706e82007-05-05 11:45:53 -07001135 " timed out\n",
Johannes Berg77fdaa12009-07-07 03:45:17 +02001136 sdata->dev->name, wk->bss->cbss.bssid);
1137
1138 /*
1139 * Most likely AP is not in the range so remove the
1140 * bss struct for that AP.
1141 */
1142 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1143
Helmut Schaa11432372009-03-12 14:04:34 +01001144 /*
1145 * We might have a pending scan which had no chance to run yet
Johannes Berg77fdaa12009-07-07 03:45:17 +02001146 * due to work needing to be done. Hence, queue the STAs work
1147 * again for that.
Helmut Schaa11432372009-03-12 14:04:34 +01001148 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001149 ieee80211_queue_work(&local->hw, &ifmgd->work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001150 return RX_MGMT_CFG80211_ASSOC_TO;
Jiri Bencf0706e82007-05-05 11:45:53 -07001151 }
1152
Johannes Berg77fdaa12009-07-07 03:45:17 +02001153 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1154 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1155 ieee80211_send_assoc(sdata, wk);
Jiri Bencf0706e82007-05-05 11:45:53 -07001156
Johannes Berg77fdaa12009-07-07 03:45:17 +02001157 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
Johannes Bergca386f32009-07-10 02:39:48 +02001158 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001159
1160 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001161}
1162
Kalle Valo3cf335d2009-03-22 21:57:06 +02001163void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1164 struct ieee80211_hdr *hdr)
1165{
1166 /*
1167 * We can postpone the mgd.timer whenever receiving unicast frames
1168 * from AP because we know that the connection is working both ways
1169 * at that time. But multicast frames (and hence also beacons) must
1170 * be ignored here, because we need to trigger the timer during
Johannes Bergb291ba12009-07-10 15:29:03 +02001171 * data idle periods for sending the periodic probe request to the
1172 * AP we're connected to.
Kalle Valo3cf335d2009-03-22 21:57:06 +02001173 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001174 if (is_multicast_ether_addr(hdr->addr1))
1175 return;
1176
1177 mod_timer(&sdata->u.mgd.conn_mon_timer,
1178 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
Kalle Valo3cf335d2009-03-22 21:57:06 +02001179}
Jiri Bencf0706e82007-05-05 11:45:53 -07001180
Maxim Levitskya43abf22009-07-31 18:54:12 +03001181static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1182{
1183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1184 const u8 *ssid;
1185
1186 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1187 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1188 ssid + 2, ssid[1], NULL, 0);
1189
1190 ifmgd->probe_send_count++;
1191 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1192 run_again(ifmgd, ifmgd->probe_timeout);
1193}
1194
Johannes Bergb291ba12009-07-10 15:29:03 +02001195static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1196 bool beacon)
Kalle Valo04de8382009-03-22 21:57:35 +02001197{
Kalle Valo04de8382009-03-22 21:57:35 +02001198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +02001199 bool already = false;
Johannes Berg34bfc412009-05-12 19:58:12 +02001200
Johannes Berg0e2b6282009-07-13 13:23:39 +02001201 if (!netif_running(sdata->dev))
1202 return;
1203
Luis R. Rodriguez91a3bd72009-07-23 16:37:47 -07001204 if (sdata->local->scanning)
1205 return;
1206
Johannes Berg77fdaa12009-07-07 03:45:17 +02001207 mutex_lock(&ifmgd->mtx);
1208
1209 if (!ifmgd->associated)
1210 goto out;
1211
Michael Buescha8604022009-04-15 14:41:22 -04001212#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergb291ba12009-07-10 15:29:03 +02001213 if (beacon && net_ratelimit())
1214 printk(KERN_DEBUG "%s: detected beacon loss from AP "
Johannes Berg77fdaa12009-07-07 03:45:17 +02001215 "- sending probe request\n", sdata->dev->name);
Michael Buescha8604022009-04-15 14:41:22 -04001216#endif
Kalle Valo04de8382009-03-22 21:57:35 +02001217
Johannes Bergb291ba12009-07-10 15:29:03 +02001218 /*
1219 * The driver/our work has already reported this event or the
1220 * connection monitoring has kicked in and we have already sent
1221 * a probe request. Or maybe the AP died and the driver keeps
1222 * reporting until we disassociate...
1223 *
1224 * In either case we have to ignore the current call to this
1225 * function (except for setting the correct probe reason bit)
1226 * because otherwise we would reset the timer every time and
1227 * never check whether we received a probe response!
1228 */
1229 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1230 IEEE80211_STA_CONNECTION_POLL))
1231 already = true;
1232
1233 if (beacon)
1234 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1235 else
1236 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1237
1238 if (already)
1239 goto out;
1240
Johannes Berg4e751842009-06-10 15:16:52 +02001241 mutex_lock(&sdata->local->iflist_mtx);
1242 ieee80211_recalc_ps(sdata->local, -1);
1243 mutex_unlock(&sdata->local->iflist_mtx);
1244
Maxim Levitskya43abf22009-07-31 18:54:12 +03001245 ifmgd->probe_send_count = 0;
1246 ieee80211_mgd_probe_ap_send(sdata);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001247 out:
1248 mutex_unlock(&ifmgd->mtx);
Kalle Valo04de8382009-03-22 21:57:35 +02001249}
1250
Johannes Bergb291ba12009-07-10 15:29:03 +02001251void ieee80211_beacon_loss_work(struct work_struct *work)
1252{
1253 struct ieee80211_sub_if_data *sdata =
1254 container_of(work, struct ieee80211_sub_if_data,
1255 u.mgd.beacon_loss_work);
1256
1257 ieee80211_mgd_probe_ap(sdata, true);
1258}
1259
Kalle Valo04de8382009-03-22 21:57:35 +02001260void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1261{
1262 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1263
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001264 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
Kalle Valo04de8382009-03-22 21:57:35 +02001265}
1266EXPORT_SYMBOL(ieee80211_beacon_loss);
1267
Johannes Berg77fdaa12009-07-07 03:45:17 +02001268static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1269 struct ieee80211_mgd_work *wk)
Jiri Bencf0706e82007-05-05 11:45:53 -07001270{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001271 wk->state = IEEE80211_MGD_STATE_IDLE;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001272 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001273}
1274
1275
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001276static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001277 struct ieee80211_mgd_work *wk,
Jiri Bencf0706e82007-05-05 11:45:53 -07001278 struct ieee80211_mgmt *mgmt,
1279 size_t len)
1280{
1281 u8 *pos;
1282 struct ieee802_11_elems elems;
1283
Jiri Bencf0706e82007-05-05 11:45:53 -07001284 pos = mgmt->u.auth.variable;
John W. Linville67a4cce2007-10-12 16:40:37 -04001285 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001286 if (!elems.challenge)
Jiri Bencf0706e82007-05-05 11:45:53 -07001287 return;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001288 ieee80211_send_auth(sdata, 3, wk->auth_alg,
Johannes Berg46900292009-02-15 12:44:28 +01001289 elems.challenge - 2, elems.challenge_len + 2,
Johannes Bergfffd0932009-07-08 14:22:54 +02001290 wk->bss->cbss.bssid,
1291 wk->key, wk->key_len, wk->key_idx);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001292 wk->auth_transaction = 4;
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001293}
1294
Johannes Berg77fdaa12009-07-07 03:45:17 +02001295static enum rx_mgmt_action __must_check
1296ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1297 struct ieee80211_mgd_work *wk,
1298 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001299{
Jiri Bencf0706e82007-05-05 11:45:53 -07001300 u16 auth_alg, auth_transaction, status_code;
1301
Johannes Berg77fdaa12009-07-07 03:45:17 +02001302 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1303 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001304
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001305 if (len < 24 + 6)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001306 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001307
Johannes Berg77fdaa12009-07-07 03:45:17 +02001308 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1309 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001310
Johannes Berg77fdaa12009-07-07 03:45:17 +02001311 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1312 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001313
1314 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1315 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1316 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1317
Johannes Berg77fdaa12009-07-07 03:45:17 +02001318 if (auth_alg != wk->auth_alg ||
1319 auth_transaction != wk->auth_transaction)
1320 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001321
1322 if (status_code != WLAN_STATUS_SUCCESS) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02001323 list_del(&wk->list);
1324 kfree(wk);
1325 return RX_MGMT_CFG80211_AUTH;
Jiri Bencf0706e82007-05-05 11:45:53 -07001326 }
1327
Johannes Berg77fdaa12009-07-07 03:45:17 +02001328 switch (wk->auth_alg) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001329 case WLAN_AUTH_OPEN:
1330 case WLAN_AUTH_LEAP:
Jouni Malinen636a5d32009-03-19 13:39:22 +02001331 case WLAN_AUTH_FT:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001332 ieee80211_auth_completed(sdata, wk);
1333 return RX_MGMT_CFG80211_AUTH;
Jiri Bencf0706e82007-05-05 11:45:53 -07001334 case WLAN_AUTH_SHARED_KEY:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001335 if (wk->auth_transaction == 4) {
1336 ieee80211_auth_completed(sdata, wk);
1337 return RX_MGMT_CFG80211_AUTH;
Jouni Malinen6039f6d2009-03-19 13:39:21 +02001338 } else
Johannes Berg77fdaa12009-07-07 03:45:17 +02001339 ieee80211_auth_challenge(sdata, wk, mgmt, len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001340 break;
1341 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02001342
1343 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001344}
1345
1346
Johannes Berg77fdaa12009-07-07 03:45:17 +02001347static enum rx_mgmt_action __must_check
1348ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1349 struct ieee80211_mgd_work *wk,
1350 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001351{
Johannes Berg46900292009-02-15 12:44:28 +01001352 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001353 const u8 *bssid = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001354 u16 reason_code;
1355
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001356 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001357 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001358
Johannes Berg77fdaa12009-07-07 03:45:17 +02001359 ASSERT_MGD_MTX(ifmgd);
1360
1361 if (wk)
1362 bssid = wk->bss->cbss.bssid;
1363 else
1364 bssid = ifmgd->associated->cbss.bssid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001365
1366 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1367
Johannes Berg77fdaa12009-07-07 03:45:17 +02001368 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1369 sdata->dev->name, bssid, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001370
Johannes Berg77fdaa12009-07-07 03:45:17 +02001371 if (!wk) {
Johannes Berge21546a2009-08-06 20:41:32 +02001372 ieee80211_set_disassoc(sdata, true);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001373 } else {
1374 list_del(&wk->list);
1375 kfree(wk);
1376 }
1377
1378 return RX_MGMT_CFG80211_DEAUTH;
Jiri Bencf0706e82007-05-05 11:45:53 -07001379}
1380
1381
Johannes Berg77fdaa12009-07-07 03:45:17 +02001382static enum rx_mgmt_action __must_check
1383ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1384 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001385{
Johannes Berg46900292009-02-15 12:44:28 +01001386 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001387 u16 reason_code;
1388
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001389 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001390 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001391
Johannes Berg77fdaa12009-07-07 03:45:17 +02001392 ASSERT_MGD_MTX(ifmgd);
1393
1394 if (WARN_ON(!ifmgd->associated))
1395 return RX_MGMT_NONE;
1396
1397 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1398 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001399
1400 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1401
Johannes Berg0ff71612009-09-26 14:45:41 +02001402 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1403 sdata->dev->name, mgmt->sa, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001404
Johannes Berge21546a2009-08-06 20:41:32 +02001405 ieee80211_set_disassoc(sdata, false);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001406 return RX_MGMT_CFG80211_DISASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -07001407}
1408
1409
Johannes Berg77fdaa12009-07-07 03:45:17 +02001410static enum rx_mgmt_action __must_check
1411ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1412 struct ieee80211_mgd_work *wk,
1413 struct ieee80211_mgmt *mgmt, size_t len,
1414 bool reassoc)
Jiri Bencf0706e82007-05-05 11:45:53 -07001415{
Johannes Berg46900292009-02-15 12:44:28 +01001416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001417 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001418 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07001419 struct sta_info *sta;
Johannes Berg881d9482009-01-21 15:13:48 +01001420 u32 rates, basic_rates;
Jiri Bencf0706e82007-05-05 11:45:53 -07001421 u16 capab_info, status_code, aid;
1422 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02001423 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Bencf0706e82007-05-05 11:45:53 -07001424 u8 *pos;
Johannes Bergae5eb022008-10-14 16:58:37 +02001425 u32 changed = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001426 int i, j;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001427 bool have_higher_than_11mbit = false, newsta = false;
Johannes Bergae5eb022008-10-14 16:58:37 +02001428 u16 ap_ht_cap_flags;
Jiri Bencf0706e82007-05-05 11:45:53 -07001429
Johannes Berg77fdaa12009-07-07 03:45:17 +02001430 /*
1431 * AssocResp and ReassocResp have identical structure, so process both
1432 * of them in this function.
1433 */
Jiri Bencf0706e82007-05-05 11:45:53 -07001434
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001435 if (len < 24 + 6)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001436 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001437
Johannes Berg77fdaa12009-07-07 03:45:17 +02001438 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1439 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001440
1441 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1442 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1443 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001444
Johannes Berg0c68ae262008-10-27 15:56:10 -07001445 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
Jiri Bencf0706e82007-05-05 11:45:53 -07001446 "status=%d aid=%d)\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001447 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
Johannes Bergddd68582007-10-22 14:51:37 +02001448 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
Jiri Bencf0706e82007-05-05 11:45:53 -07001449
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001450 pos = mgmt->u.assoc_resp.variable;
1451 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1452
1453 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
Jouni Malinenf797eb72009-01-19 18:48:46 +02001454 elems.timeout_int && elems.timeout_int_len == 5 &&
1455 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001456 u32 tu, ms;
Jouni Malinenf797eb72009-01-19 18:48:46 +02001457 tu = get_unaligned_le32(elems.timeout_int + 1);
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001458 ms = tu * 1024 / 1000;
1459 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1460 "comeback duration %u TU (%u ms)\n",
1461 sdata->dev->name, tu, ms);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001462 wk->timeout = jiffies + msecs_to_jiffies(ms);
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001463 if (ms > IEEE80211_ASSOC_TIMEOUT)
Johannes Bergca386f32009-07-10 02:39:48 +02001464 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
Johannes Berg77fdaa12009-07-07 03:45:17 +02001465 return RX_MGMT_NONE;
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001466 }
1467
Jiri Bencf0706e82007-05-05 11:45:53 -07001468 if (status_code != WLAN_STATUS_SUCCESS) {
1469 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001470 sdata->dev->name, status_code);
Johannes Berg2ef6e442009-10-20 15:08:12 +09001471 wk->state = IEEE80211_MGD_STATE_IDLE;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001472 return RX_MGMT_CFG80211_ASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -07001473 }
1474
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001475 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1476 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001477 "set\n", sdata->dev->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001478 aid &= ~(BIT(15) | BIT(14));
1479
Jiri Bencf0706e82007-05-05 11:45:53 -07001480 if (!elems.supp_rates) {
1481 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001482 sdata->dev->name);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001483 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001484 }
1485
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001486 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
Johannes Berg46900292009-02-15 12:44:28 +01001487 ifmgd->aid = aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001488
Johannes Bergd0709a62008-02-25 16:27:46 +01001489 rcu_read_lock();
1490
Jiri Bencf0706e82007-05-05 11:45:53 -07001491 /* Add STA entry for the AP */
Johannes Berg77fdaa12009-07-07 03:45:17 +02001492 sta = sta_info_get(local, wk->bss->cbss.bssid);
Jiri Bencf0706e82007-05-05 11:45:53 -07001493 if (!sta) {
Johannes Bergddf4ac52008-10-22 11:41:38 +02001494 newsta = true;
Johannes Bergd0709a62008-02-25 16:27:46 +01001495
Johannes Berg77fdaa12009-07-07 03:45:17 +02001496 rcu_read_unlock();
1497
1498 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
Johannes Berg73651ee2008-02-25 16:27:47 +01001499 if (!sta) {
1500 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001501 " the AP\n", sdata->dev->name);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001502 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001503 }
Johannes Berg73651ee2008-02-25 16:27:47 +01001504
Johannes Berg77fdaa12009-07-07 03:45:17 +02001505 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1506 WLAN_STA_ASSOC_AP);
1507 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1508 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1509
1510 rcu_read_lock();
Jiri Bencf0706e82007-05-05 11:45:53 -07001511 }
1512
Jiri Bencf0706e82007-05-05 11:45:53 -07001513 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001514 basic_rates = 0;
1515 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1516
Jiri Bencf0706e82007-05-05 11:45:53 -07001517 for (i = 0; i < elems.supp_rates_len; i++) {
1518 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001519 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001520
1521 if (rate > 110)
1522 have_higher_than_11mbit = true;
1523
1524 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001525 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001526 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001527 if (is_basic)
1528 basic_rates |= BIT(j);
1529 break;
1530 }
Johannes Berg8318d782008-01-24 19:38:38 +01001531 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001532 }
Johannes Berg8318d782008-01-24 19:38:38 +01001533
Jiri Bencf0706e82007-05-05 11:45:53 -07001534 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1535 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Johannes Berg7e0986c2009-04-19 13:22:11 +02001536 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001537
1538 if (rate > 110)
1539 have_higher_than_11mbit = true;
1540
1541 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001542 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001543 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001544 if (is_basic)
1545 basic_rates |= BIT(j);
1546 break;
1547 }
Johannes Berg8318d782008-01-24 19:38:38 +01001548 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001549 }
Johannes Berg8318d782008-01-24 19:38:38 +01001550
Johannes Berg323ce792008-09-11 02:45:11 +02001551 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Johannes Bergbda39332008-10-11 01:51:51 +02001552 sdata->vif.bss_conf.basic_rates = basic_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01001553
1554 /* cf. IEEE 802.11 9.2.12 */
1555 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1556 have_higher_than_11mbit)
1557 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1558 else
1559 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001560
Johannes Bergab1faea2009-07-01 21:41:17 +02001561 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001562 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02001563 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02001564
1565 ap_ht_cap_flags = sta->sta.ht_cap.cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001566
Johannes Berg4b7679a2008-09-18 18:14:18 +02001567 rate_control_rate_init(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001568
Johannes Berg46900292009-02-15 12:44:28 +01001569 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
Jouni Malinen5394af42009-01-08 13:31:59 +02001570 set_sta_flags(sta, WLAN_STA_MFP);
1571
Johannes Bergddf4ac52008-10-22 11:41:38 +02001572 if (elems.wmm_param)
Johannes Berg07346f812008-05-03 01:02:02 +02001573 set_sta_flags(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02001574
1575 if (newsta) {
1576 int err = sta_info_insert(sta);
1577 if (err) {
1578 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1579 " the AP (error %d)\n", sdata->dev->name, err);
1580 rcu_read_unlock();
Johannes Berg77fdaa12009-07-07 03:45:17 +02001581 return RX_MGMT_NONE;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001582 }
1583 }
1584
1585 rcu_read_unlock();
1586
1587 if (elems.wmm_param)
Johannes Berg46900292009-02-15 12:44:28 +01001588 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07001589 elems.wmm_param_len);
Johannes Bergaa837e12009-05-07 16:16:24 +02001590 else
1591 ieee80211_set_wmm_default(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001592
Johannes Bergae5eb022008-10-14 16:58:37 +02001593 if (elems.ht_info_elem && elems.wmm_param &&
Johannes Berg46900292009-02-15 12:44:28 +01001594 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001595 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001596 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001597 wk->bss->cbss.bssid,
Johannes Bergae5eb022008-10-14 16:58:37 +02001598 ap_ht_cap_flags);
1599
Johannes Berg056508d2009-07-30 21:43:55 +02001600 /* delete work item -- must be before set_associated for PS */
1601 list_del(&wk->list);
1602
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001603 /* set AID and assoc capability,
1604 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01001605 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001606 bss_conf->assoc_capability = capab_info;
Johannes Berge21546a2009-08-06 20:41:32 +02001607 /* this will take ownership of wk */
1608 ieee80211_set_associated(sdata, wk, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001609
Kalle Valo15b7b062009-03-22 21:57:14 +02001610 /*
Johannes Bergb291ba12009-07-10 15:29:03 +02001611 * Start timer to probe the connection to the AP now.
1612 * Also start the timer that will detect beacon loss.
Kalle Valo15b7b062009-03-22 21:57:14 +02001613 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001614 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1615 mod_beacon_timer(sdata);
Kalle Valo15b7b062009-03-22 21:57:14 +02001616
Johannes Berg77fdaa12009-07-07 03:45:17 +02001617 return RX_MGMT_CFG80211_ASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -07001618}
1619
1620
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001621static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001622 struct ieee80211_mgmt *mgmt,
1623 size_t len,
1624 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001625 struct ieee802_11_elems *elems,
1626 bool beacon)
Jiri Bencf0706e82007-05-05 11:45:53 -07001627{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001628 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001629 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02001630 struct ieee80211_bss *bss;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01001631 struct ieee80211_channel *channel;
Jiri Bencf0706e82007-05-05 11:45:53 -07001632
Johannes Berg5bda6172008-09-08 11:05:10 +02001633 if (elems->ds_params && elems->ds_params_len == 1)
1634 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1635 else
1636 freq = rx_status->freq;
1637
1638 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1639
1640 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1641 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001642
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001643 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
Johannes Berg2a519312009-02-10 21:25:55 +01001644 channel, beacon);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001645 if (bss)
1646 ieee80211_rx_bss_put(local, bss);
1647
1648 if (!sdata->u.mgd.associated)
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001649 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001650
Sujithc481ec92009-01-06 09:28:37 +05301651 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
Johannes Berg77fdaa12009-07-07 03:45:17 +02001652 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1653 ETH_ALEN) == 0)) {
Sujithc481ec92009-01-06 09:28:37 +05301654 struct ieee80211_channel_sw_ie *sw_elem =
1655 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
Johannes Bergcc32abd2009-05-15 11:52:31 +02001656 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
Sujithc481ec92009-01-06 09:28:37 +05301657 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001658}
1659
1660
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001661static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001662 struct ieee80211_mgd_work *wk,
1663 struct ieee80211_mgmt *mgmt, size_t len,
Jiri Bencf0706e82007-05-05 11:45:53 -07001664 struct ieee80211_rx_status *rx_status)
1665{
Kalle Valo15b7b062009-03-22 21:57:14 +02001666 struct ieee80211_if_managed *ifmgd;
Ester Kummerae6a44e2008-06-27 18:54:48 +03001667 size_t baselen;
1668 struct ieee802_11_elems elems;
1669
Kalle Valo15b7b062009-03-22 21:57:14 +02001670 ifmgd = &sdata->u.mgd;
1671
Johannes Berg77fdaa12009-07-07 03:45:17 +02001672 ASSERT_MGD_MTX(ifmgd);
1673
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03001674 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1675 return; /* ignore ProbeResp to foreign address */
1676
Ester Kummerae6a44e2008-06-27 18:54:48 +03001677 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1678 if (baselen > len)
1679 return;
1680
1681 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1682 &elems);
1683
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001684 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001685
1686 /* direct probe may be part of the association flow */
Johannes Berg77fdaa12009-07-07 03:45:17 +02001687 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
Johannes Berg0ff71612009-09-26 14:45:41 +02001688 printk(KERN_DEBUG "%s: direct probe responded\n",
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001689 sdata->dev->name);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001690 wk->tries = 0;
1691 wk->state = IEEE80211_MGD_STATE_AUTH;
1692 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001693 }
Kalle Valo15b7b062009-03-22 21:57:14 +02001694
Johannes Berg77fdaa12009-07-07 03:45:17 +02001695 if (ifmgd->associated &&
1696 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
Johannes Bergb291ba12009-07-10 15:29:03 +02001697 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1698 IEEE80211_STA_CONNECTION_POLL)) {
1699 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1700 IEEE80211_STA_BEACON_POLL);
Johannes Berg4e751842009-06-10 15:16:52 +02001701 mutex_lock(&sdata->local->iflist_mtx);
1702 ieee80211_recalc_ps(sdata->local, -1);
1703 mutex_unlock(&sdata->local->iflist_mtx);
Johannes Bergb291ba12009-07-10 15:29:03 +02001704 /*
1705 * We've received a probe response, but are not sure whether
1706 * we have or will be receiving any beacons or data, so let's
1707 * schedule the timers again, just in case.
1708 */
1709 mod_beacon_timer(sdata);
1710 mod_timer(&ifmgd->conn_mon_timer,
1711 round_jiffies_up(jiffies +
1712 IEEE80211_CONNECTION_IDLE_TIME));
Johannes Berg4e751842009-06-10 15:16:52 +02001713 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001714}
1715
Johannes Bergd91f36d2009-04-16 13:17:26 +02001716/*
1717 * This is the canonical list of information elements we care about,
1718 * the filter code also gives us all changes to the Microsoft OUI
1719 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1720 *
1721 * We implement beacon filtering in software since that means we can
1722 * avoid processing the frame here and in cfg80211, and userspace
1723 * will not be able to tell whether the hardware supports it or not.
1724 *
1725 * XXX: This list needs to be dynamic -- userspace needs to be able to
1726 * add items it requires. It also needs to be able to tell us to
1727 * look out for other vendor IEs.
1728 */
1729static const u64 care_about_ies =
Johannes Berg1d4df3a2009-04-22 11:25:43 +02001730 (1ULL << WLAN_EID_COUNTRY) |
1731 (1ULL << WLAN_EID_ERP_INFO) |
1732 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1733 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1734 (1ULL << WLAN_EID_HT_CAPABILITY) |
1735 (1ULL << WLAN_EID_HT_INFORMATION);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001736
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001737static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001738 struct ieee80211_mgmt *mgmt,
1739 size_t len,
1740 struct ieee80211_rx_status *rx_status)
1741{
Johannes Bergd91f36d2009-04-16 13:17:26 +02001742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001743 size_t baselen;
1744 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001745 struct ieee80211_local *local = sdata->local;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001746 u32 changed = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001747 bool erp_valid, directed_tim = false;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001748 u8 erp_value = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001749 u32 ncrc;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001750 u8 *bssid;
1751
1752 ASSERT_MGD_MTX(ifmgd);
Jiri Bencf0706e82007-05-05 11:45:53 -07001753
Ester Kummerae6a44e2008-06-27 18:54:48 +03001754 /* Process beacon from the current BSS */
1755 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1756 if (baselen > len)
1757 return;
1758
Johannes Bergd91f36d2009-04-16 13:17:26 +02001759 if (rx_status->freq != local->hw.conf.channel->center_freq)
Jiri Bencf0706e82007-05-05 11:45:53 -07001760 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001761
Johannes Bergb291ba12009-07-10 15:29:03 +02001762 /*
1763 * We might have received a number of frames, among them a
1764 * disassoc frame and a beacon...
1765 */
1766 if (!ifmgd->associated)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001767 return;
1768
1769 bssid = ifmgd->associated->cbss.bssid;
1770
Johannes Bergb291ba12009-07-10 15:29:03 +02001771 /*
1772 * And in theory even frames from a different AP we were just
1773 * associated to a split-second ago!
1774 */
1775 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001776 return;
1777
Johannes Bergb291ba12009-07-10 15:29:03 +02001778 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
Jouni Malinen92778182009-05-14 21:15:36 +03001779#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1780 if (net_ratelimit()) {
1781 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1782 "to a received beacon\n", sdata->dev->name);
1783 }
1784#endif
Johannes Bergb291ba12009-07-10 15:29:03 +02001785 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
Johannes Berg4e751842009-06-10 15:16:52 +02001786 mutex_lock(&local->iflist_mtx);
1787 ieee80211_recalc_ps(local, -1);
1788 mutex_unlock(&local->iflist_mtx);
Jouni Malinen92778182009-05-14 21:15:36 +03001789 }
1790
Johannes Bergb291ba12009-07-10 15:29:03 +02001791 /*
1792 * Push the beacon loss detection into the future since
1793 * we are processing a beacon from the AP just now.
1794 */
1795 mod_beacon_timer(sdata);
1796
Johannes Bergd91f36d2009-04-16 13:17:26 +02001797 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1798 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1799 len - baselen, &elems,
1800 care_about_ies, ncrc);
1801
1802 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
Johannes Berge7ec86f2009-04-18 17:33:24 +02001803 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1804 ifmgd->aid);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001805
Jouni Malinen30196672009-05-19 17:01:43 +03001806 if (ncrc != ifmgd->beacon_crc) {
1807 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1808 true);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001809
Jouni Malinen30196672009-05-19 17:01:43 +03001810 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1811 elems.wmm_param_len);
1812 }
Johannes Bergfe3fa822008-09-08 11:05:09 +02001813
Vivek Natarajan25c9c872009-03-02 20:20:30 +05301814 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
Kalle Valo1fb36062009-02-10 17:09:24 +02001815 if (directed_tim) {
Kalle Valo572e0012009-02-10 17:09:31 +02001816 if (local->hw.conf.dynamic_ps_timeout > 0) {
1817 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1818 ieee80211_hw_config(local,
1819 IEEE80211_CONF_CHANGE_PS);
1820 ieee80211_send_nullfunc(local, sdata, 0);
1821 } else {
1822 local->pspolling = true;
1823
1824 /*
1825 * Here is assumed that the driver will be
1826 * able to send ps-poll frame and receive a
1827 * response even though power save mode is
1828 * enabled, but some drivers might require
1829 * to disable power save here. This needs
1830 * to be investigated.
1831 */
1832 ieee80211_send_pspoll(local, sdata);
1833 }
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001834 }
1835 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001836
Jouni Malinen30196672009-05-19 17:01:43 +03001837 if (ncrc == ifmgd->beacon_crc)
1838 return;
1839 ifmgd->beacon_crc = ncrc;
1840
Johannes Berg7a5158e2008-10-08 10:59:33 +02001841 if (elems.erp_info && elems.erp_info_len >= 1) {
1842 erp_valid = true;
1843 erp_value = elems.erp_info[0];
1844 } else {
1845 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04001846 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001847 changed |= ieee80211_handle_bss_capability(sdata,
1848 le16_to_cpu(mgmt->u.beacon.capab_info),
1849 erp_valid, erp_value);
Jiri Bencf0706e82007-05-05 11:45:53 -07001850
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001851
Vasanthakumar Thiagarajan53d6f81c2009-02-11 22:18:49 +05301852 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001853 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001854 struct sta_info *sta;
1855 struct ieee80211_supported_band *sband;
1856 u16 ap_ht_cap_flags;
1857
1858 rcu_read_lock();
1859
Johannes Berg77fdaa12009-07-07 03:45:17 +02001860 sta = sta_info_get(local, bssid);
1861 if (WARN_ON(!sta)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001862 rcu_read_unlock();
1863 return;
1864 }
1865
1866 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1867
1868 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1869 elems.ht_cap_elem, &sta->sta.ht_cap);
1870
1871 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1872
1873 rcu_read_unlock();
1874
1875 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001876 bssid, ap_ht_cap_flags);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001877 }
1878
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07001879 /* Note: country IE parsing is done for us by cfg80211 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001880 if (elems.country_elem) {
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301881 /* TODO: IBSS also needs this */
1882 if (elems.pwr_constr_elem)
1883 ieee80211_handle_pwr_constr(sdata,
1884 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1885 elems.pwr_constr_elem,
1886 elems.pwr_constr_elem_len);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001887 }
1888
Johannes Berg471b3ef2007-12-28 14:32:58 +01001889 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001890}
1891
Johannes Berg46900292009-02-15 12:44:28 +01001892ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
Johannes Bergf1d58c22009-06-17 13:13:00 +02001893 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001894{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001895 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001896 struct ieee80211_mgmt *mgmt;
1897 u16 fc;
1898
1899 if (skb->len < 24)
Johannes Berg46900292009-02-15 12:44:28 +01001900 return RX_DROP_MONITOR;
Jiri Bencf0706e82007-05-05 11:45:53 -07001901
1902 mgmt = (struct ieee80211_mgmt *) skb->data;
1903 fc = le16_to_cpu(mgmt->frame_control);
1904
1905 switch (fc & IEEE80211_FCTL_STYPE) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001906 case IEEE80211_STYPE_PROBE_RESP:
1907 case IEEE80211_STYPE_BEACON:
Jiri Bencf0706e82007-05-05 11:45:53 -07001908 case IEEE80211_STYPE_AUTH:
1909 case IEEE80211_STYPE_ASSOC_RESP:
1910 case IEEE80211_STYPE_REASSOC_RESP:
1911 case IEEE80211_STYPE_DEAUTH:
1912 case IEEE80211_STYPE_DISASSOC:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001913 case IEEE80211_STYPE_ACTION:
Johannes Berg46900292009-02-15 12:44:28 +01001914 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001915 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
Johannes Berg46900292009-02-15 12:44:28 +01001916 return RX_QUEUED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001917 }
1918
Johannes Berg46900292009-02-15 12:44:28 +01001919 return RX_DROP_MONITOR;
Jiri Bencf0706e82007-05-05 11:45:53 -07001920}
1921
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001922static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001923 struct sk_buff *skb)
1924{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001926 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07001927 struct ieee80211_mgmt *mgmt;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001928 struct ieee80211_mgd_work *wk;
1929 enum rx_mgmt_action rma = RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001930 u16 fc;
1931
Jiri Bencf0706e82007-05-05 11:45:53 -07001932 rx_status = (struct ieee80211_rx_status *) skb->cb;
1933 mgmt = (struct ieee80211_mgmt *) skb->data;
1934 fc = le16_to_cpu(mgmt->frame_control);
1935
Johannes Berg77fdaa12009-07-07 03:45:17 +02001936 mutex_lock(&ifmgd->mtx);
1937
1938 if (ifmgd->associated &&
1939 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1940 ETH_ALEN) == 0) {
1941 switch (fc & IEEE80211_FCTL_STYPE) {
1942 case IEEE80211_STYPE_BEACON:
1943 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1944 rx_status);
1945 break;
1946 case IEEE80211_STYPE_PROBE_RESP:
1947 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1948 skb->len, rx_status);
1949 break;
1950 case IEEE80211_STYPE_DEAUTH:
1951 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1952 mgmt, skb->len);
1953 break;
1954 case IEEE80211_STYPE_DISASSOC:
1955 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1956 break;
1957 case IEEE80211_STYPE_ACTION:
1958 /* XXX: differentiate, can only happen for CSA now! */
1959 ieee80211_sta_process_chanswitch(sdata,
1960 &mgmt->u.action.u.chan_switch.sw_elem,
1961 ifmgd->associated);
1962 break;
1963 }
1964 mutex_unlock(&ifmgd->mtx);
1965
1966 switch (rma) {
1967 case RX_MGMT_NONE:
1968 /* no action */
1969 break;
1970 case RX_MGMT_CFG80211_DEAUTH:
Holger Schurigce470612009-10-13 13:28:13 +02001971 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001972 break;
1973 case RX_MGMT_CFG80211_DISASSOC:
Holger Schurigce470612009-10-13 13:28:13 +02001974 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001975 break;
1976 default:
1977 WARN(1, "unexpected: %d", rma);
1978 }
1979 goto out;
1980 }
1981
1982 list_for_each_entry(wk, &ifmgd->work_list, list) {
1983 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1984 continue;
1985
1986 switch (fc & IEEE80211_FCTL_STYPE) {
1987 case IEEE80211_STYPE_PROBE_RESP:
1988 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1989 rx_status);
1990 break;
1991 case IEEE80211_STYPE_AUTH:
1992 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1993 break;
1994 case IEEE80211_STYPE_ASSOC_RESP:
1995 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1996 skb->len, false);
1997 break;
1998 case IEEE80211_STYPE_REASSOC_RESP:
1999 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2000 skb->len, true);
2001 break;
2002 case IEEE80211_STYPE_DEAUTH:
2003 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2004 skb->len);
2005 break;
2006 }
2007 /*
2008 * We've processed this frame for that work, so it can't
2009 * belong to another work struct.
2010 * NB: this is also required for correctness because the
2011 * called functions can free 'wk', and for 'rma'!
2012 */
Johannes Berg46900292009-02-15 12:44:28 +01002013 break;
Jiri Bencf0706e82007-05-05 11:45:53 -07002014 }
2015
Johannes Berg77fdaa12009-07-07 03:45:17 +02002016 mutex_unlock(&ifmgd->mtx);
2017
2018 switch (rma) {
2019 case RX_MGMT_NONE:
2020 /* no action */
2021 break;
2022 case RX_MGMT_CFG80211_AUTH:
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002023 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002024 break;
2025 case RX_MGMT_CFG80211_ASSOC:
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002026 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002027 break;
Johannes Berg8d8b2612009-07-25 11:58:36 +02002028 case RX_MGMT_CFG80211_DEAUTH:
Holger Schurigce470612009-10-13 13:28:13 +02002029 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg8d8b2612009-07-25 11:58:36 +02002030 break;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002031 default:
2032 WARN(1, "unexpected: %d", rma);
2033 }
2034
2035 out:
Jiri Bencf0706e82007-05-05 11:45:53 -07002036 kfree_skb(skb);
2037}
2038
Johannes Berg9c6bd792008-09-11 00:01:52 +02002039static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e82007-05-05 11:45:53 -07002040{
2041 struct ieee80211_sub_if_data *sdata =
2042 (struct ieee80211_sub_if_data *) data;
Johannes Berg46900292009-02-15 12:44:28 +01002043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002044 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002045
Johannes Berg5bb644a2009-05-17 11:40:42 +02002046 if (local->quiescing) {
2047 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2048 return;
2049 }
2050
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002051 ieee80211_queue_work(&local->hw, &ifmgd->work);
Jiri Bencf0706e82007-05-05 11:45:53 -07002052}
2053
Johannes Berg9c6bd792008-09-11 00:01:52 +02002054static void ieee80211_sta_work(struct work_struct *work)
Johannes Berg60f8b392008-09-08 17:44:22 +02002055{
2056 struct ieee80211_sub_if_data *sdata =
Johannes Berg46900292009-02-15 12:44:28 +01002057 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
Johannes Berg60f8b392008-09-08 17:44:22 +02002058 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01002059 struct ieee80211_if_managed *ifmgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02002060 struct sk_buff *skb;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002061 struct ieee80211_mgd_work *wk, *tmp;
2062 LIST_HEAD(free_work);
2063 enum rx_mgmt_action rma;
2064 bool anybusy = false;
Johannes Berg60f8b392008-09-08 17:44:22 +02002065
2066 if (!netif_running(sdata->dev))
2067 return;
2068
Helmut Schaafbe9c422009-07-23 12:14:04 +02002069 if (local->scanning)
Johannes Berg60f8b392008-09-08 17:44:22 +02002070 return;
2071
Johannes Berg46900292009-02-15 12:44:28 +01002072 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
Johannes Berg60f8b392008-09-08 17:44:22 +02002073 return;
Johannes Berg5bb644a2009-05-17 11:40:42 +02002074
2075 /*
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002076 * ieee80211_queue_work() should have picked up most cases,
2077 * here we'll pick the the rest.
Johannes Berg5bb644a2009-05-17 11:40:42 +02002078 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002079 if (WARN(local->suspended, "STA MLME work scheduled while "
2080 "going to suspend\n"))
Johannes Berg5bb644a2009-05-17 11:40:42 +02002081 return;
2082
Johannes Berg46900292009-02-15 12:44:28 +01002083 ifmgd = &sdata->u.mgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02002084
Johannes Berg77fdaa12009-07-07 03:45:17 +02002085 /* first process frames to avoid timing out while a frame is pending */
Johannes Berg46900292009-02-15 12:44:28 +01002086 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
Johannes Berg60f8b392008-09-08 17:44:22 +02002087 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2088
Johannes Berg77fdaa12009-07-07 03:45:17 +02002089 /* then process the rest of the work */
2090 mutex_lock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02002091
Johannes Bergb291ba12009-07-10 15:29:03 +02002092 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2093 IEEE80211_STA_CONNECTION_POLL) &&
2094 ifmgd->associated) {
Maxim Levitskya43abf22009-07-31 18:54:12 +03002095 u8 bssid[ETH_ALEN];
2096
2097 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
Johannes Bergb291ba12009-07-10 15:29:03 +02002098 if (time_is_after_jiffies(ifmgd->probe_timeout))
2099 run_again(ifmgd, ifmgd->probe_timeout);
Maxim Levitskya43abf22009-07-31 18:54:12 +03002100
2101 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2102#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2103 printk(KERN_DEBUG "No probe response from AP %pM"
2104 " after %dms, try %d\n", bssid,
2105 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2106 ifmgd->probe_send_count);
2107#endif
2108 ieee80211_mgd_probe_ap_send(sdata);
2109 } else {
Johannes Bergb291ba12009-07-10 15:29:03 +02002110 /*
2111 * We actually lost the connection ... or did we?
2112 * Let's make sure!
2113 */
2114 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2115 IEEE80211_STA_BEACON_POLL);
Johannes Bergb291ba12009-07-10 15:29:03 +02002116 printk(KERN_DEBUG "No probe response from AP %pM"
2117 " after %dms, disconnecting.\n",
2118 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
Johannes Berge21546a2009-08-06 20:41:32 +02002119 ieee80211_set_disassoc(sdata, true);
Johannes Bergb291ba12009-07-10 15:29:03 +02002120 mutex_unlock(&ifmgd->mtx);
2121 /*
2122 * must be outside lock due to cfg80211,
2123 * but that's not a problem.
2124 */
2125 ieee80211_send_deauth_disassoc(sdata, bssid,
2126 IEEE80211_STYPE_DEAUTH,
2127 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2128 NULL);
2129 mutex_lock(&ifmgd->mtx);
2130 }
2131 }
2132
Johannes Berg60f8b392008-09-08 17:44:22 +02002133
Johannes Berg5cff20e2009-04-29 12:26:17 +02002134 ieee80211_recalc_idle(local);
2135
Johannes Berg77fdaa12009-07-07 03:45:17 +02002136 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
Johannes Bergca386f32009-07-10 02:39:48 +02002137 if (time_is_after_jiffies(wk->timeout)) {
2138 /*
2139 * This work item isn't supposed to be worked on
2140 * right now, but take care to adjust the timer
2141 * properly.
2142 */
2143 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002144 continue;
Johannes Bergca386f32009-07-10 02:39:48 +02002145 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02002146
2147 switch (wk->state) {
2148 default:
2149 WARN_ON(1);
2150 /* fall through */
2151 case IEEE80211_MGD_STATE_IDLE:
2152 /* nothing */
2153 rma = RX_MGMT_NONE;
2154 break;
2155 case IEEE80211_MGD_STATE_PROBE:
2156 rma = ieee80211_direct_probe(sdata, wk);
2157 break;
2158 case IEEE80211_MGD_STATE_AUTH:
2159 rma = ieee80211_authenticate(sdata, wk);
2160 break;
2161 case IEEE80211_MGD_STATE_ASSOC:
2162 rma = ieee80211_associate(sdata, wk);
2163 break;
2164 }
2165
2166 switch (rma) {
2167 case RX_MGMT_NONE:
2168 /* no action required */
2169 break;
2170 case RX_MGMT_CFG80211_AUTH_TO:
2171 case RX_MGMT_CFG80211_ASSOC_TO:
2172 list_del(&wk->list);
2173 list_add(&wk->list, &free_work);
2174 wk->tries = rma; /* small abuse but only local */
2175 break;
2176 default:
2177 WARN(1, "unexpected: %d", rma);
2178 }
2179 }
2180
Jouni Malinen5bf6fcc2009-08-25 17:44:28 +03002181 list_for_each_entry(wk, &ifmgd->work_list, list) {
2182 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2183 anybusy = true;
2184 break;
2185 }
2186 }
2187 if (!anybusy &&
2188 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2189 ieee80211_queue_delayed_work(&local->hw,
2190 &local->scan_work,
2191 round_jiffies_relative(0));
2192
Johannes Berg77fdaa12009-07-07 03:45:17 +02002193 mutex_unlock(&ifmgd->mtx);
2194
2195 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2196 switch (wk->tries) {
2197 case RX_MGMT_CFG80211_AUTH_TO:
2198 cfg80211_send_auth_timeout(sdata->dev,
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002199 wk->bss->cbss.bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002200 break;
2201 case RX_MGMT_CFG80211_ASSOC_TO:
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002202 cfg80211_send_assoc_timeout(sdata->dev,
2203 wk->bss->cbss.bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002204 break;
2205 default:
2206 WARN(1, "unexpected: %d", wk->tries);
2207 }
2208
2209 list_del(&wk->list);
2210 kfree(wk);
2211 }
2212
2213 ieee80211_recalc_idle(local);
Johannes Berg60f8b392008-09-08 17:44:22 +02002214}
Johannes Berg0a51b272008-09-08 17:44:25 +02002215
Johannes Bergb291ba12009-07-10 15:29:03 +02002216static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2217{
2218 struct ieee80211_sub_if_data *sdata =
2219 (struct ieee80211_sub_if_data *) data;
2220 struct ieee80211_local *local = sdata->local;
2221
2222 if (local->quiescing)
2223 return;
2224
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002225 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02002226}
2227
2228static void ieee80211_sta_conn_mon_timer(unsigned long data)
2229{
2230 struct ieee80211_sub_if_data *sdata =
2231 (struct ieee80211_sub_if_data *) data;
2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2233 struct ieee80211_local *local = sdata->local;
2234
2235 if (local->quiescing)
2236 return;
2237
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002238 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02002239}
2240
2241static void ieee80211_sta_monitor_work(struct work_struct *work)
2242{
2243 struct ieee80211_sub_if_data *sdata =
2244 container_of(work, struct ieee80211_sub_if_data,
2245 u.mgd.monitor_work);
2246
2247 ieee80211_mgd_probe_ap(sdata, false);
2248}
2249
Johannes Berga1678f82008-09-11 00:01:47 +02002250static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2251{
Kalle Vaload935682009-04-19 08:47:19 +03002252 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
Johannes Bergb291ba12009-07-10 15:29:03 +02002253 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2254 IEEE80211_STA_CONNECTION_POLL);
Kalle Vaload935682009-04-19 08:47:19 +03002255
Johannes Bergb291ba12009-07-10 15:29:03 +02002256 /* let's probe the connection once */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002257 ieee80211_queue_work(&sdata->local->hw,
Johannes Bergb291ba12009-07-10 15:29:03 +02002258 &sdata->u.mgd.monitor_work);
2259 /* and do all the other regular work too */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002260 ieee80211_queue_work(&sdata->local->hw,
Johannes Berg46900292009-02-15 12:44:28 +01002261 &sdata->u.mgd.work);
Kalle Vaload935682009-04-19 08:47:19 +03002262 }
Johannes Berga1678f82008-09-11 00:01:47 +02002263}
2264
Johannes Berg5bb644a2009-05-17 11:40:42 +02002265#ifdef CONFIG_PM
2266void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2267{
2268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2269
2270 /*
2271 * we need to use atomic bitops for the running bits
2272 * only because both timers might fire at the same
2273 * time -- the code here is properly synchronised.
2274 */
2275
2276 cancel_work_sync(&ifmgd->work);
2277 cancel_work_sync(&ifmgd->beacon_loss_work);
2278 if (del_timer_sync(&ifmgd->timer))
2279 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2280
2281 cancel_work_sync(&ifmgd->chswitch_work);
2282 if (del_timer_sync(&ifmgd->chswitch_timer))
2283 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
Johannes Bergb291ba12009-07-10 15:29:03 +02002284
2285 cancel_work_sync(&ifmgd->monitor_work);
2286 /* these will just be re-established on connection */
2287 del_timer_sync(&ifmgd->conn_mon_timer);
2288 del_timer_sync(&ifmgd->bcn_mon_timer);
Johannes Berg5bb644a2009-05-17 11:40:42 +02002289}
2290
2291void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2292{
2293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2294
2295 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2296 add_timer(&ifmgd->timer);
2297 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2298 add_timer(&ifmgd->chswitch_timer);
2299}
2300#endif
2301
Johannes Berg9c6bd792008-09-11 00:01:52 +02002302/* interface setup */
2303void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2304{
Johannes Berg46900292009-02-15 12:44:28 +01002305 struct ieee80211_if_managed *ifmgd;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002306
Johannes Berg46900292009-02-15 12:44:28 +01002307 ifmgd = &sdata->u.mgd;
2308 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02002309 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
Johannes Berg46900292009-02-15 12:44:28 +01002310 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
Kalle Valo04de8382009-03-22 21:57:35 +02002311 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
Johannes Berg46900292009-02-15 12:44:28 +01002312 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
Johannes Berg9c6bd792008-09-11 00:01:52 +02002313 (unsigned long) sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02002314 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2315 (unsigned long) sdata);
2316 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2317 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01002318 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
Sujithc481ec92009-01-06 09:28:37 +05302319 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01002320 skb_queue_head_init(&ifmgd->skb_queue);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002321
Johannes Berg77fdaa12009-07-07 03:45:17 +02002322 INIT_LIST_HEAD(&ifmgd->work_list);
2323
Johannes Berg46900292009-02-15 12:44:28 +01002324 ifmgd->capab = WLAN_CAPABILITY_ESS;
Johannes Bergab1faea2009-07-01 21:41:17 +02002325 ifmgd->flags = 0;
Johannes Berg176be722009-03-12 23:49:28 +01002326 if (sdata->local->hw.queues >= 4)
Johannes Berg46900292009-02-15 12:44:28 +01002327 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
Johannes Bergbbbdff92009-04-16 13:27:42 +02002328
Johannes Berg77fdaa12009-07-07 03:45:17 +02002329 mutex_init(&ifmgd->mtx);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002330}
2331
2332/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02002333void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2334{
2335 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
Johannes Berga1678f82008-09-11 00:01:47 +02002336
2337 /* Restart STA timers */
2338 rcu_read_lock();
2339 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2340 ieee80211_restart_sta_timer(sdata);
2341 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02002342}
Johannes Berg10f644a2009-04-16 13:17:25 +02002343
2344int ieee80211_max_network_latency(struct notifier_block *nb,
2345 unsigned long data, void *dummy)
2346{
2347 s32 latency_usec = (s32) data;
2348 struct ieee80211_local *local =
2349 container_of(nb, struct ieee80211_local,
2350 network_latency_notifier);
2351
2352 mutex_lock(&local->iflist_mtx);
2353 ieee80211_recalc_ps(local, latency_usec);
2354 mutex_unlock(&local->iflist_mtx);
2355
2356 return 0;
2357}
Johannes Berg77fdaa12009-07-07 03:45:17 +02002358
2359/* config hooks */
2360int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2361 struct cfg80211_auth_request *req)
2362{
2363 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2364 const u8 *ssid;
2365 struct ieee80211_mgd_work *wk;
2366 u16 auth_alg;
2367
2368 switch (req->auth_type) {
2369 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2370 auth_alg = WLAN_AUTH_OPEN;
2371 break;
2372 case NL80211_AUTHTYPE_SHARED_KEY:
2373 auth_alg = WLAN_AUTH_SHARED_KEY;
2374 break;
2375 case NL80211_AUTHTYPE_FT:
2376 auth_alg = WLAN_AUTH_FT;
2377 break;
2378 case NL80211_AUTHTYPE_NETWORK_EAP:
2379 auth_alg = WLAN_AUTH_LEAP;
2380 break;
2381 default:
2382 return -EOPNOTSUPP;
2383 }
2384
2385 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2386 if (!wk)
2387 return -ENOMEM;
2388
2389 wk->bss = (void *)req->bss;
2390
2391 if (req->ie && req->ie_len) {
2392 memcpy(wk->ie, req->ie, req->ie_len);
2393 wk->ie_len = req->ie_len;
2394 }
2395
Johannes Bergfffd0932009-07-08 14:22:54 +02002396 if (req->key && req->key_len) {
2397 wk->key_len = req->key_len;
2398 wk->key_idx = req->key_idx;
2399 memcpy(wk->key, req->key, req->key_len);
2400 }
2401
Johannes Berg77fdaa12009-07-07 03:45:17 +02002402 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2403 memcpy(wk->ssid, ssid + 2, ssid[1]);
2404 wk->ssid_len = ssid[1];
2405
2406 wk->state = IEEE80211_MGD_STATE_PROBE;
2407 wk->auth_alg = auth_alg;
Johannes Berg48531842009-07-23 16:50:16 +02002408 wk->timeout = jiffies; /* run right away */
Johannes Berg77fdaa12009-07-07 03:45:17 +02002409
2410 /*
2411 * XXX: if still associated need to tell AP that we're going
2412 * to sleep and then change channel etc.
2413 */
2414 sdata->local->oper_channel = req->bss->channel;
2415 ieee80211_hw_config(sdata->local, 0);
2416
2417 mutex_lock(&ifmgd->mtx);
2418 list_add(&wk->list, &sdata->u.mgd.work_list);
2419 mutex_unlock(&ifmgd->mtx);
2420
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002421 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002422 return 0;
2423}
2424
2425int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2426 struct cfg80211_assoc_request *req)
2427{
2428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2429 struct ieee80211_mgd_work *wk, *found = NULL;
2430 int i, err;
2431
2432 mutex_lock(&ifmgd->mtx);
2433
2434 list_for_each_entry(wk, &ifmgd->work_list, list) {
2435 if (&wk->bss->cbss == req->bss &&
2436 wk->state == IEEE80211_MGD_STATE_IDLE) {
2437 found = wk;
2438 break;
2439 }
2440 }
2441
2442 if (!found) {
2443 err = -ENOLINK;
2444 goto out;
2445 }
2446
2447 list_del(&found->list);
2448
2449 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2450 if (!wk) {
2451 list_add(&found->list, &ifmgd->work_list);
2452 err = -ENOMEM;
2453 goto out;
2454 }
2455
2456 list_add(&wk->list, &ifmgd->work_list);
2457
2458 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2459
2460 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2461 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2462 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2463 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2464 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2465
2466 sdata->local->oper_channel = req->bss->channel;
2467 ieee80211_hw_config(sdata->local, 0);
2468
2469 if (req->ie && req->ie_len) {
2470 memcpy(wk->ie, req->ie, req->ie_len);
2471 wk->ie_len = req->ie_len;
2472 } else
2473 wk->ie_len = 0;
2474
2475 if (req->prev_bssid)
2476 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2477
2478 wk->state = IEEE80211_MGD_STATE_ASSOC;
2479 wk->tries = 0;
Johannes Berg48531842009-07-23 16:50:16 +02002480 wk->timeout = jiffies; /* run right away */
Johannes Berg77fdaa12009-07-07 03:45:17 +02002481
2482 if (req->use_mfp) {
2483 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2484 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2485 } else {
2486 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2487 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2488 }
2489
2490 if (req->crypto.control_port)
2491 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2492 else
2493 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2494
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002495 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002496
2497 err = 0;
2498
2499 out:
2500 mutex_unlock(&ifmgd->mtx);
2501 return err;
2502}
2503
2504int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503dd2009-07-07 03:56:11 +02002505 struct cfg80211_deauth_request *req,
2506 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002507{
2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2509 struct ieee80211_mgd_work *wk;
2510 const u8 *bssid = NULL;
Johannes Berga58ce432009-11-19 12:45:42 +01002511 bool not_auth_yet = false;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002512
Johannes Berg77fdaa12009-07-07 03:45:17 +02002513 mutex_lock(&ifmgd->mtx);
2514
2515 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2516 bssid = req->bss->bssid;
Johannes Berge21546a2009-08-06 20:41:32 +02002517 ieee80211_set_disassoc(sdata, true);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002518 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2519 if (&wk->bss->cbss == req->bss) {
2520 bssid = req->bss->bssid;
Johannes Berga58ce432009-11-19 12:45:42 +01002521 if (wk->state == IEEE80211_MGD_STATE_PROBE)
2522 not_auth_yet = true;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002523 list_del(&wk->list);
2524 kfree(wk);
2525 break;
2526 }
2527 }
2528
Johannes Berg8d8b2612009-07-25 11:58:36 +02002529 /*
Johannes Berga58ce432009-11-19 12:45:42 +01002530 * If somebody requests authentication and we haven't
2531 * sent out an auth frame yet there's no need to send
2532 * out a deauth frame either. If the state was PROBE,
2533 * then this is the case. If it's AUTH we have sent a
2534 * frame, and if it's IDLE we have completed the auth
2535 * process already.
2536 */
2537 if (not_auth_yet) {
2538 mutex_unlock(&ifmgd->mtx);
2539 __cfg80211_auth_canceled(sdata->dev, bssid);
2540 return 0;
2541 }
2542
2543 /*
Johannes Berg8d8b2612009-07-25 11:58:36 +02002544 * cfg80211 should catch this ... but it's racy since
2545 * we can receive a deauth frame, process it, hand it
2546 * to cfg80211 while that's in a locked section already
2547 * trying to tell us that the user wants to disconnect.
2548 */
2549 if (!bssid) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002550 mutex_unlock(&ifmgd->mtx);
2551 return -ENOLINK;
2552 }
2553
2554 mutex_unlock(&ifmgd->mtx);
2555
Johannes Berg0ff71612009-09-26 14:45:41 +02002556 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2557 sdata->dev->name, bssid, req->reason_code);
2558
Johannes Berg77fdaa12009-07-07 03:45:17 +02002559 ieee80211_send_deauth_disassoc(sdata, bssid,
Johannes Berg667503dd2009-07-07 03:56:11 +02002560 IEEE80211_STYPE_DEAUTH, req->reason_code,
2561 cookie);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002562
2563 return 0;
2564}
2565
2566int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503dd2009-07-07 03:56:11 +02002567 struct cfg80211_disassoc_request *req,
2568 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002569{
2570 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2571
Johannes Berg77fdaa12009-07-07 03:45:17 +02002572 mutex_lock(&ifmgd->mtx);
2573
Johannes Berg8d8b2612009-07-25 11:58:36 +02002574 /*
2575 * cfg80211 should catch this ... but it's racy since
2576 * we can receive a disassoc frame, process it, hand it
2577 * to cfg80211 while that's in a locked section already
2578 * trying to tell us that the user wants to disconnect.
2579 */
2580 if (&ifmgd->associated->cbss != req->bss) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002581 mutex_unlock(&ifmgd->mtx);
2582 return -ENOLINK;
2583 }
2584
Johannes Berg0ff71612009-09-26 14:45:41 +02002585 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2586 sdata->dev->name, req->bss->bssid, req->reason_code);
2587
Johannes Berge21546a2009-08-06 20:41:32 +02002588 ieee80211_set_disassoc(sdata, false);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002589
2590 mutex_unlock(&ifmgd->mtx);
2591
2592 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
Johannes Berg667503dd2009-07-07 03:56:11 +02002593 IEEE80211_STYPE_DISASSOC, req->reason_code,
2594 cookie);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002595 return 0;
2596}