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Jiri Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 11:45:53 -070015#include <linux/if_ether.h>
16#include <linux/skbuff.h>
Jiri Bencf0706e822007-05-05 11:45:53 -070017#include <linux/if_arp.h>
Jiri Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Bencf0706e822007-05-05 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 Berge50db652008-09-09 15:07:09 +0200429 ieee80211_tx_skb(sdata, skb, 0);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200430}
431
432
Johannes Bergef422bc2008-09-09 10:58:25 +0200433static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503d2009-07-07 03:56:11 +0200434 const u8 *bssid, u16 stype, u16 reason,
435 void *cookie)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200436{
437 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200439 struct sk_buff *skb;
440 struct ieee80211_mgmt *mgmt;
441
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200442 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
Johannes Berg9ac19a92008-09-09 10:57:09 +0200443 if (!skb) {
Johannes Bergef422bc2008-09-09 10:58:25 +0200444 printk(KERN_DEBUG "%s: failed to allocate buffer for "
445 "deauth/disassoc frame\n", sdata->dev->name);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200446 return;
447 }
448 skb_reserve(skb, local->hw.extra_tx_headroom);
449
450 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
451 memset(mgmt, 0, 24);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200452 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200453 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200454 memcpy(mgmt->bssid, bssid, ETH_ALEN);
Johannes Bergef422bc2008-09-09 10:58:25 +0200455 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200456 skb_put(skb, 2);
Johannes Bergef422bc2008-09-09 10:58:25 +0200457 /* u.deauth.reason_code == u.disassoc.reason_code */
Johannes Berg9ac19a92008-09-09 10:57:09 +0200458 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
459
Jouni Malinen53b46b82009-03-27 20:53:56 +0200460 if (stype == IEEE80211_STYPE_DEAUTH)
Johannes Berg667503d2009-07-07 03:56:11 +0200461 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
Jouni Malinen53b46b82009-03-27 20:53:56 +0200462 else
Johannes Berg667503d2009-07-07 03:56:11 +0200463 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
Johannes Berg46900292009-02-15 12:44:28 +0100464 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200465}
466
Kalle Valo572e0012009-02-10 17:09:31 +0200467void ieee80211_send_pspoll(struct ieee80211_local *local,
468 struct ieee80211_sub_if_data *sdata)
469{
Johannes Berg46900292009-02-15 12:44:28 +0100470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Kalle Valo572e0012009-02-10 17:09:31 +0200471 struct ieee80211_pspoll *pspoll;
472 struct sk_buff *skb;
473 u16 fc;
474
475 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
476 if (!skb) {
477 printk(KERN_DEBUG "%s: failed to allocate buffer for "
478 "pspoll frame\n", sdata->dev->name);
479 return;
480 }
481 skb_reserve(skb, local->hw.extra_tx_headroom);
482
483 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
484 memset(pspoll, 0, sizeof(*pspoll));
485 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
486 pspoll->frame_control = cpu_to_le16(fc);
Johannes Berg46900292009-02-15 12:44:28 +0100487 pspoll->aid = cpu_to_le16(ifmgd->aid);
Kalle Valo572e0012009-02-10 17:09:31 +0200488
489 /* aid in PS-Poll has its two MSBs each set to 1 */
490 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
491
Johannes Berg46900292009-02-15 12:44:28 +0100492 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
Kalle Valo572e0012009-02-10 17:09:31 +0200493 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
494
495 ieee80211_tx_skb(sdata, skb, 0);
Kalle Valo572e0012009-02-10 17:09:31 +0200496}
497
Johannes Berg965beda2009-04-16 13:17:24 +0200498void ieee80211_send_nullfunc(struct ieee80211_local *local,
499 struct ieee80211_sub_if_data *sdata,
500 int powersave)
501{
502 struct sk_buff *skb;
503 struct ieee80211_hdr *nullfunc;
504 __le16 fc;
505
506 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
507 return;
508
509 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
510 if (!skb) {
511 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
512 "frame\n", sdata->dev->name);
513 return;
514 }
515 skb_reserve(skb, local->hw.extra_tx_headroom);
516
517 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
518 memset(nullfunc, 0, 24);
519 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
520 IEEE80211_FCTL_TODS);
521 if (powersave)
522 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
523 nullfunc->frame_control = fc;
524 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
525 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
526 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
527
528 ieee80211_tx_skb(sdata, skb, 0);
529}
530
Johannes Bergcc32abd2009-05-15 11:52:31 +0200531/* spectrum management related things */
532static void ieee80211_chswitch_work(struct work_struct *work)
533{
534 struct ieee80211_sub_if_data *sdata =
535 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
537
538 if (!netif_running(sdata->dev))
539 return;
540
Johannes Berg77fdaa12009-07-07 03:45:17 +0200541 mutex_lock(&ifmgd->mtx);
542 if (!ifmgd->associated)
543 goto out;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200544
545 sdata->local->oper_channel = sdata->local->csa_channel;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200546 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200547
Johannes Berg77fdaa12009-07-07 03:45:17 +0200548 /* XXX: shouldn't really modify cfg80211-owned data! */
549 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
550
Johannes Bergcc32abd2009-05-15 11:52:31 +0200551 ieee80211_wake_queues_by_reason(&sdata->local->hw,
552 IEEE80211_QUEUE_STOP_REASON_CSA);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200553 out:
554 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
555 mutex_unlock(&ifmgd->mtx);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200556}
557
558static void ieee80211_chswitch_timer(unsigned long data)
559{
560 struct ieee80211_sub_if_data *sdata =
561 (struct ieee80211_sub_if_data *) data;
562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
563
Johannes Berg5bb644a2009-05-17 11:40:42 +0200564 if (sdata->local->quiescing) {
565 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
566 return;
567 }
568
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400569 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200570}
571
572void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
573 struct ieee80211_channel_sw_ie *sw_elem,
574 struct ieee80211_bss *bss)
575{
576 struct ieee80211_channel *new_ch;
577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
578 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
579
Johannes Berg77fdaa12009-07-07 03:45:17 +0200580 ASSERT_MGD_MTX(ifmgd);
581
582 if (!ifmgd->associated)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200583 return;
584
Helmut Schaafbe9c422009-07-23 12:14:04 +0200585 if (sdata->local->scanning)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200586 return;
587
588 /* Disregard subsequent beacons if we are already running a timer
589 processing a CSA */
590
591 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
592 return;
593
594 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
595 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
596 return;
597
598 sdata->local->csa_channel = new_ch;
599
600 if (sw_elem->count <= 1) {
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400601 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200602 } else {
603 ieee80211_stop_queues_by_reason(&sdata->local->hw,
604 IEEE80211_QUEUE_STOP_REASON_CSA);
605 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
606 mod_timer(&ifmgd->chswitch_timer,
607 jiffies +
608 msecs_to_jiffies(sw_elem->count *
609 bss->cbss.beacon_interval));
610 }
611}
612
613static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
614 u16 capab_info, u8 *pwr_constr_elem,
615 u8 pwr_constr_elem_len)
616{
617 struct ieee80211_conf *conf = &sdata->local->hw.conf;
618
619 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
620 return;
621
622 /* Power constraint IE length should be 1 octet */
623 if (pwr_constr_elem_len != 1)
624 return;
625
626 if ((*pwr_constr_elem <= conf->channel->max_power) &&
627 (*pwr_constr_elem != sdata->local->power_constr_level)) {
628 sdata->local->power_constr_level = *pwr_constr_elem;
629 ieee80211_hw_config(sdata->local, 0);
630 }
631}
632
Johannes Berg965beda2009-04-16 13:17:24 +0200633/* powersave */
634static void ieee80211_enable_ps(struct ieee80211_local *local,
635 struct ieee80211_sub_if_data *sdata)
636{
637 struct ieee80211_conf *conf = &local->hw.conf;
638
Johannes Bergd5edaed2009-04-22 23:02:51 +0200639 /*
640 * If we are scanning right now then the parameters will
641 * take effect when scan finishes.
642 */
Helmut Schaafbe9c422009-07-23 12:14:04 +0200643 if (local->scanning)
Johannes Bergd5edaed2009-04-22 23:02:51 +0200644 return;
645
Johannes Berg965beda2009-04-16 13:17:24 +0200646 if (conf->dynamic_ps_timeout > 0 &&
647 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
648 mod_timer(&local->dynamic_ps_timer, jiffies +
649 msecs_to_jiffies(conf->dynamic_ps_timeout));
650 } else {
651 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
652 ieee80211_send_nullfunc(local, sdata, 1);
653 conf->flags |= IEEE80211_CONF_PS;
654 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
655 }
656}
657
658static void ieee80211_change_ps(struct ieee80211_local *local)
659{
660 struct ieee80211_conf *conf = &local->hw.conf;
661
662 if (local->ps_sdata) {
Johannes Berg965beda2009-04-16 13:17:24 +0200663 ieee80211_enable_ps(local, local->ps_sdata);
664 } else if (conf->flags & IEEE80211_CONF_PS) {
665 conf->flags &= ~IEEE80211_CONF_PS;
666 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
667 del_timer_sync(&local->dynamic_ps_timer);
668 cancel_work_sync(&local->dynamic_ps_enable_work);
669 }
670}
671
672/* need to hold RTNL or interface lock */
Johannes Berg10f644a2009-04-16 13:17:25 +0200673void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
Johannes Berg965beda2009-04-16 13:17:24 +0200674{
675 struct ieee80211_sub_if_data *sdata, *found = NULL;
676 int count = 0;
677
678 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
679 local->ps_sdata = NULL;
680 return;
681 }
682
683 list_for_each_entry(sdata, &local->interfaces, list) {
684 if (!netif_running(sdata->dev))
685 continue;
686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
687 continue;
688 found = sdata;
689 count++;
690 }
691
Luis R. Rodriguez43f78532009-06-10 15:16:15 +0200692 if (count == 1 && found->u.mgd.powersave &&
Johannes Berg77fdaa12009-07-07 03:45:17 +0200693 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
Johannes Bergb291ba12009-07-10 15:29:03 +0200694 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
695 IEEE80211_STA_CONNECTION_POLL))) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200696 s32 beaconint_us;
697
698 if (latency < 0)
699 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
700
701 beaconint_us = ieee80211_tu_to_usec(
702 found->vif.bss_conf.beacon_int);
703
Johannes Berg04fe2032009-04-22 18:44:37 +0200704 if (beaconint_us > latency) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200705 local->ps_sdata = NULL;
Johannes Berg04fe2032009-04-22 18:44:37 +0200706 } else {
707 u8 dtimper = found->vif.bss_conf.dtim_period;
708 int maxslp = 1;
709
710 if (dtimper > 1)
711 maxslp = min_t(int, dtimper,
712 latency / beaconint_us);
713
Johannes Berg9ccebe62009-04-23 10:32:36 +0200714 local->hw.conf.max_sleep_period = maxslp;
Johannes Berg10f644a2009-04-16 13:17:25 +0200715 local->ps_sdata = found;
Johannes Berg04fe2032009-04-22 18:44:37 +0200716 }
Johannes Berg10f644a2009-04-16 13:17:25 +0200717 } else {
Johannes Berg965beda2009-04-16 13:17:24 +0200718 local->ps_sdata = NULL;
Johannes Berg10f644a2009-04-16 13:17:25 +0200719 }
Johannes Berg965beda2009-04-16 13:17:24 +0200720
721 ieee80211_change_ps(local);
722}
723
724void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
725{
726 struct ieee80211_local *local =
727 container_of(work, struct ieee80211_local,
728 dynamic_ps_disable_work);
729
730 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
731 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
732 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
733 }
734
735 ieee80211_wake_queues_by_reason(&local->hw,
736 IEEE80211_QUEUE_STOP_REASON_PS);
737}
738
739void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
740{
741 struct ieee80211_local *local =
742 container_of(work, struct ieee80211_local,
743 dynamic_ps_enable_work);
744 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
745
746 /* can only happen when PS was just disabled anyway */
747 if (!sdata)
748 return;
749
750 if (local->hw.conf.flags & IEEE80211_CONF_PS)
751 return;
752
753 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
754 ieee80211_send_nullfunc(local, sdata, 1);
755
756 local->hw.conf.flags |= IEEE80211_CONF_PS;
757 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
758}
759
760void ieee80211_dynamic_ps_timer(unsigned long data)
761{
762 struct ieee80211_local *local = (void *) data;
763
Luis R. Rodriguez78f1a8b2009-07-27 08:38:25 -0700764 if (local->quiescing || local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +0200765 return;
766
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400767 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
Johannes Berg965beda2009-04-16 13:17:24 +0200768}
769
Johannes Berg60f8b392008-09-08 17:44:22 +0200770/* MLME */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200771static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Johannes Berg46900292009-02-15 12:44:28 +0100772 struct ieee80211_if_managed *ifmgd,
Jiri Bencf0706e822007-05-05 11:45:53 -0700773 u8 *wmm_param, size_t wmm_param_len)
774{
Jiri Bencf0706e822007-05-05 11:45:53 -0700775 struct ieee80211_tx_queue_params params;
776 size_t left;
777 int count;
778 u8 *pos;
779
Johannes Berg46900292009-02-15 12:44:28 +0100780 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
Johannes Berg3434fbd2008-05-03 00:59:37 +0200781 return;
782
783 if (!wmm_param)
784 return;
785
Jiri Bencf0706e822007-05-05 11:45:53 -0700786 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
787 return;
788 count = wmm_param[6] & 0x0f;
Johannes Berg46900292009-02-15 12:44:28 +0100789 if (count == ifmgd->wmm_last_param_set)
Jiri Bencf0706e822007-05-05 11:45:53 -0700790 return;
Johannes Berg46900292009-02-15 12:44:28 +0100791 ifmgd->wmm_last_param_set = count;
Jiri Bencf0706e822007-05-05 11:45:53 -0700792
793 pos = wmm_param + 8;
794 left = wmm_param_len - 8;
795
796 memset(&params, 0, sizeof(params));
797
Jiri Bencf0706e822007-05-05 11:45:53 -0700798 local->wmm_acm = 0;
799 for (; left >= 4; left -= 4, pos += 4) {
800 int aci = (pos[0] >> 5) & 0x03;
801 int acm = (pos[0] >> 4) & 0x01;
802 int queue;
803
804 switch (aci) {
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200805 case 1: /* AC_BK */
Johannes Berge100bb62008-04-30 18:51:21 +0200806 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200807 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200808 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
Jiri Bencf0706e822007-05-05 11:45:53 -0700809 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200810 case 2: /* AC_VI */
Johannes Berge100bb62008-04-30 18:51:21 +0200811 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200812 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200813 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
Jiri Bencf0706e822007-05-05 11:45:53 -0700814 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200815 case 3: /* AC_VO */
Johannes Berge100bb62008-04-30 18:51:21 +0200816 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200817 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200818 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
Jiri Bencf0706e822007-05-05 11:45:53 -0700819 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200820 case 0: /* AC_BE */
Jiri Bencf0706e822007-05-05 11:45:53 -0700821 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200822 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200823 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200824 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
Jiri Bencf0706e822007-05-05 11:45:53 -0700825 break;
826 }
827
828 params.aifs = pos[0] & 0x0f;
829 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
830 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200831 params.txop = get_unaligned_le16(pos + 2);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200832#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e822007-05-05 11:45:53 -0700833 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Johannes Berg3330d7b2008-02-10 16:49:38 +0100834 "cWmin=%d cWmax=%d txop=%d\n",
Johannes Berg0bffe402009-06-09 16:18:32 +0200835 wiphy_name(local->hw.wiphy), queue, aci, acm,
836 params.aifs, params.cw_min, params.cw_max, params.txop);
Johannes Berg3330d7b2008-02-10 16:49:38 +0100837#endif
Johannes Berg24487982009-04-23 18:52:52 +0200838 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
Jiri Bencf0706e822007-05-05 11:45:53 -0700839 printk(KERN_DEBUG "%s: failed to set TX queue "
Johannes Berg0bffe402009-06-09 16:18:32 +0200840 "parameters for queue %d\n",
841 wiphy_name(local->hw.wiphy), queue);
Jiri Bencf0706e822007-05-05 11:45:53 -0700842 }
843}
844
Johannes Berg7a5158e2008-10-08 10:59:33 +0200845static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
846 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +0200847{
Johannes Bergbda39332008-10-11 01:51:51 +0200848 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100849 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200850 bool use_protection;
851 bool use_short_preamble;
852 bool use_short_slot;
853
854 if (erp_valid) {
855 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
856 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
857 } else {
858 use_protection = false;
859 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
860 }
861
862 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Daniel Drake56282212007-07-10 19:32:10 +0200863
Johannes Berg471b3ef2007-12-28 14:32:58 +0100864 if (use_protection != bss_conf->use_cts_prot) {
Johannes Berg471b3ef2007-12-28 14:32:58 +0100865 bss_conf->use_cts_prot = use_protection;
866 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200867 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200868
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200869 if (use_short_preamble != bss_conf->use_short_preamble) {
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200870 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100871 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200872 }
Daniel Draked9430a32007-07-27 15:43:24 +0200873
Johannes Berg7a5158e2008-10-08 10:59:33 +0200874 if (use_short_slot != bss_conf->use_short_slot) {
Johannes Berg7a5158e2008-10-08 10:59:33 +0200875 bss_conf->use_short_slot = use_short_slot;
876 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -0400877 }
878
879 return changed;
880}
881
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200882static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Berge21546a2009-08-06 20:41:32 +0200883 struct ieee80211_mgd_work *wk,
Johannes Bergae5eb022008-10-14 16:58:37 +0200884 u32 bss_info_changed)
Jiri Bencf0706e822007-05-05 11:45:53 -0700885{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100886 struct ieee80211_local *local = sdata->local;
Johannes Berge21546a2009-08-06 20:41:32 +0200887 struct ieee80211_bss *bss = wk->bss;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400888
Johannes Bergae5eb022008-10-14 16:58:37 +0200889 bss_info_changed |= BSS_CHANGED_ASSOC;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200890 /* set timing information */
891 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
892 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
893 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400894
Johannes Berg77fdaa12009-07-07 03:45:17 +0200895 bss_info_changed |= BSS_CHANGED_BEACON_INT;
896 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
897 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700898
Johannes Berg77fdaa12009-07-07 03:45:17 +0200899 sdata->u.mgd.associated = bss;
Johannes Berge21546a2009-08-06 20:41:32 +0200900 sdata->u.mgd.old_associate_work = wk;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200901 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
Johannes Berg471b3ef2007-12-28 14:32:58 +0100902
Johannes Bergb291ba12009-07-10 15:29:03 +0200903 /* just to be sure */
904 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
905 IEEE80211_STA_BEACON_POLL);
906
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200907 ieee80211_led_assoc(local, 1);
908
Johannes Bergbda39332008-10-11 01:51:51 +0200909 sdata->vif.bss_conf.assoc = 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200910 /*
911 * For now just always ask the driver to update the basic rateset
912 * when we have associated, we aren't checking whether it actually
913 * changed or not.
914 */
Johannes Bergae5eb022008-10-14 16:58:37 +0200915 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
Johannes Berg9cef8732009-05-14 13:10:14 +0200916
917 /* And the BSSID changed - we're associated now */
918 bss_info_changed |= BSS_CHANGED_BSSID;
919
Johannes Bergae5eb022008-10-14 16:58:37 +0200920 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300921
Johannes Berg056508d2009-07-30 21:43:55 +0200922 mutex_lock(&local->iflist_mtx);
923 ieee80211_recalc_ps(local, -1);
924 mutex_unlock(&local->iflist_mtx);
Kalle Valoe0cb6862008-12-18 23:35:13 +0200925
Tomas Winkler24e64622008-09-08 17:33:40 +0200926 netif_tx_start_all_queues(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200927 netif_carrier_on(sdata->dev);
Jiri Bencf0706e822007-05-05 11:45:53 -0700928}
929
Johannes Berg77fdaa12009-07-07 03:45:17 +0200930static enum rx_mgmt_action __must_check
931ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
932 struct ieee80211_mgd_work *wk)
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300933{
Johannes Berg46900292009-02-15 12:44:28 +0100934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Helmut Schaa11432372009-03-12 14:04:34 +0100935 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100936
Johannes Berg77fdaa12009-07-07 03:45:17 +0200937 wk->tries++;
938 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700939 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
Johannes Berg77fdaa12009-07-07 03:45:17 +0200940 sdata->dev->name, wk->bss->cbss.bssid);
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530941
942 /*
943 * Most likely AP is not in the range so remove the
Johannes Berg77fdaa12009-07-07 03:45:17 +0200944 * bss struct for that AP.
Vasanthakumar Thiagarajan7a947082009-02-04 18:28:48 +0530945 */
Johannes Berg77fdaa12009-07-07 03:45:17 +0200946 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
Helmut Schaa11432372009-03-12 14:04:34 +0100947
948 /*
949 * We might have a pending scan which had no chance to run yet
Johannes Berg77fdaa12009-07-07 03:45:17 +0200950 * due to work needing to be done. Hence, queue the STAs work
951 * again for that.
Helmut Schaa11432372009-03-12 14:04:34 +0100952 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400953 ieee80211_queue_work(&local->hw, &ifmgd->work);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200954 return RX_MGMT_CFG80211_AUTH_TO;
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300955 }
956
Johannes Berg77fdaa12009-07-07 03:45:17 +0200957 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
958 sdata->dev->name, wk->bss->cbss.bssid,
959 wk->tries);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300960
Johannes Berg77fdaa12009-07-07 03:45:17 +0200961 /*
962 * Direct probe is sent to broadcast address as some APs
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300963 * will not answer to direct packet in unassociated state.
964 */
Johannes Berg77fdaa12009-07-07 03:45:17 +0200965 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300966
Johannes Berg77fdaa12009-07-07 03:45:17 +0200967 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
Johannes Bergca386f32009-07-10 02:39:48 +0200968 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200969
970 return RX_MGMT_NONE;
Ron Rindjunsky9859b812008-08-09 03:02:19 +0300971}
972
Jiri Bencf0706e822007-05-05 11:45:53 -0700973
Johannes Berg77fdaa12009-07-07 03:45:17 +0200974static enum rx_mgmt_action __must_check
975ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_mgd_work *wk)
Jiri Bencf0706e822007-05-05 11:45:53 -0700977{
Johannes Berg46900292009-02-15 12:44:28 +0100978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Helmut Schaa11432372009-03-12 14:04:34 +0100979 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100980
Johannes Berg77fdaa12009-07-07 03:45:17 +0200981 wk->tries++;
982 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -0700983 printk(KERN_DEBUG "%s: authentication with AP %pM"
Jiri Bencf0706e822007-05-05 11:45:53 -0700984 " timed out\n",
Johannes Berg77fdaa12009-07-07 03:45:17 +0200985 sdata->dev->name, wk->bss->cbss.bssid);
986
987 /*
988 * Most likely AP is not in the range so remove the
989 * bss struct for that AP.
990 */
991 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
Helmut Schaa11432372009-03-12 14:04:34 +0100992
993 /*
994 * We might have a pending scan which had no chance to run yet
Johannes Berg77fdaa12009-07-07 03:45:17 +0200995 * due to work needing to be done. Hence, queue the STAs work
996 * again for that.
Helmut Schaa11432372009-03-12 14:04:34 +0100997 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400998 ieee80211_queue_work(&local->hw, &ifmgd->work);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200999 return RX_MGMT_CFG80211_AUTH_TO;
Jiri Bencf0706e822007-05-05 11:45:53 -07001000 }
1001
Johannes Berg77fdaa12009-07-07 03:45:17 +02001002 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1003 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
Jiri Bencf0706e822007-05-05 11:45:53 -07001004
Johannes Berg77fdaa12009-07-07 03:45:17 +02001005 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
Johannes Bergfffd0932009-07-08 14:22:54 +02001006 wk->bss->cbss.bssid, NULL, 0, 0);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001007 wk->auth_transaction = 2;
Jiri Bencf0706e822007-05-05 11:45:53 -07001008
Johannes Berg77fdaa12009-07-07 03:45:17 +02001009 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
Johannes Bergca386f32009-07-10 02:39:48 +02001010 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001011
1012 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001013}
1014
Johannes Berge21546a2009-08-06 20:41:32 +02001015static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1016 bool deauth)
Tomas Winkleraa458d12008-09-09 00:32:12 +03001017{
Johannes Berg46900292009-02-15 12:44:28 +01001018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Tomas Winkleraa458d12008-09-09 00:32:12 +03001019 struct ieee80211_local *local = sdata->local;
1020 struct sta_info *sta;
Kalle Valoe0cb6862008-12-18 23:35:13 +02001021 u32 changed = 0, config_changed = 0;
Johannes Bergb291ba12009-07-10 15:29:03 +02001022 u8 bssid[ETH_ALEN];
Tomas Winkleraa458d12008-09-09 00:32:12 +03001023
Johannes Berg77fdaa12009-07-07 03:45:17 +02001024 ASSERT_MGD_MTX(ifmgd);
1025
Johannes Bergb291ba12009-07-10 15:29:03 +02001026 if (WARN_ON(!ifmgd->associated))
1027 return;
1028
1029 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1030
Johannes Berg77fdaa12009-07-07 03:45:17 +02001031 ifmgd->associated = NULL;
1032 memset(ifmgd->bssid, 0, ETH_ALEN);
1033
Johannes Berge21546a2009-08-06 20:41:32 +02001034 if (deauth) {
1035 kfree(ifmgd->old_associate_work);
1036 ifmgd->old_associate_work = NULL;
1037 } else {
1038 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1039
1040 wk->state = IEEE80211_MGD_STATE_IDLE;
1041 list_add(&wk->list, &ifmgd->work_list);
1042 }
1043
Johannes Berg77fdaa12009-07-07 03:45:17 +02001044 /*
1045 * we need to commit the associated = NULL change because the
1046 * scan code uses that to determine whether this iface should
1047 * go to/wake up from powersave or not -- and could otherwise
1048 * wake the queues erroneously.
1049 */
1050 smp_mb();
1051
1052 /*
1053 * Thus, we can only afterwards stop the queues -- to account
1054 * for the case where another CPU is finishing a scan at this
1055 * time -- we don't want the scan code to enable queues.
1056 */
Tomas Winkleraa458d12008-09-09 00:32:12 +03001057
Tomas Winkler24e64622008-09-08 17:33:40 +02001058 netif_tx_stop_all_queues(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001059 netif_carrier_off(sdata->dev);
1060
Johannes Berg1fa6f4a2009-06-15 18:13:58 +02001061 rcu_read_lock();
Johannes Berg77fdaa12009-07-07 03:45:17 +02001062 sta = sta_info_get(local, bssid);
Johannes Berg1fa6f4a2009-06-15 18:13:58 +02001063 if (sta)
1064 ieee80211_sta_tear_down_BA_sessions(sta);
1065 rcu_read_unlock();
Tomas Winkleraa458d12008-09-09 00:32:12 +03001066
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001067 changed |= ieee80211_reset_erp_info(sdata);
1068
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001069 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +02001070 changed |= BSS_CHANGED_ASSOC;
1071 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001072
Johannes Bergaa837e12009-05-07 16:16:24 +02001073 ieee80211_set_wmm_default(sdata);
1074
Johannes Berg5cff20e2009-04-29 12:26:17 +02001075 ieee80211_recalc_idle(local);
1076
Johannes Berg47979382009-01-07 10:13:27 +01001077 /* channel(_type) changes are handled by ieee80211_hw_config */
Sujith094d05d2008-12-12 11:57:43 +05301078 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +02001079
Johannes Berg413ad502009-05-08 21:21:06 +02001080 /* on the next assoc, re-program HT parameters */
1081 sdata->ht_opmode_valid = false;
1082
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301083 local->power_constr_level = 0;
1084
Kalle Valo520eb822008-12-18 23:35:27 +02001085 del_timer_sync(&local->dynamic_ps_timer);
1086 cancel_work_sync(&local->dynamic_ps_enable_work);
1087
Kalle Valoe0cb6862008-12-18 23:35:13 +02001088 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1089 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1090 config_changed |= IEEE80211_CONF_CHANGE_PS;
1091 }
1092
1093 ieee80211_hw_config(local, config_changed);
Johannes Berg9cef8732009-05-14 13:10:14 +02001094
1095 /* And the BSSID changed -- not very interesting here */
1096 changed |= BSS_CHANGED_BSSID;
Johannes Bergae5eb022008-10-14 16:58:37 +02001097 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +02001098
1099 rcu_read_lock();
1100
Johannes Berg77fdaa12009-07-07 03:45:17 +02001101 sta = sta_info_get(local, bssid);
Tomas Winkler8e268e42008-11-25 13:05:44 +02001102 if (!sta) {
1103 rcu_read_unlock();
1104 return;
1105 }
1106
1107 sta_info_unlink(&sta);
1108
1109 rcu_read_unlock();
1110
1111 sta_info_destroy(sta);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001112}
Jiri Bencf0706e822007-05-05 11:45:53 -07001113
Johannes Berg77fdaa12009-07-07 03:45:17 +02001114static enum rx_mgmt_action __must_check
1115ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1116 struct ieee80211_mgd_work *wk)
Jiri Bencf0706e822007-05-05 11:45:53 -07001117{
Johannes Berg46900292009-02-15 12:44:28 +01001118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Helmut Schaa11432372009-03-12 14:04:34 +01001119 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001120
Johannes Berg77fdaa12009-07-07 03:45:17 +02001121 wk->tries++;
1122 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
Johannes Berg0c68ae262008-10-27 15:56:10 -07001123 printk(KERN_DEBUG "%s: association with AP %pM"
Jiri Bencf0706e822007-05-05 11:45:53 -07001124 " timed out\n",
Johannes Berg77fdaa12009-07-07 03:45:17 +02001125 sdata->dev->name, wk->bss->cbss.bssid);
1126
1127 /*
1128 * Most likely AP is not in the range so remove the
1129 * bss struct for that AP.
1130 */
1131 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1132
Helmut Schaa11432372009-03-12 14:04:34 +01001133 /*
1134 * We might have a pending scan which had no chance to run yet
Johannes Berg77fdaa12009-07-07 03:45:17 +02001135 * due to work needing to be done. Hence, queue the STAs work
1136 * again for that.
Helmut Schaa11432372009-03-12 14:04:34 +01001137 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001138 ieee80211_queue_work(&local->hw, &ifmgd->work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001139 return RX_MGMT_CFG80211_ASSOC_TO;
Jiri Bencf0706e822007-05-05 11:45:53 -07001140 }
1141
Johannes Berg77fdaa12009-07-07 03:45:17 +02001142 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1143 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1144 ieee80211_send_assoc(sdata, wk);
Jiri Bencf0706e822007-05-05 11:45:53 -07001145
Johannes Berg77fdaa12009-07-07 03:45:17 +02001146 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
Johannes Bergca386f32009-07-10 02:39:48 +02001147 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001148
1149 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001150}
1151
Kalle Valo3cf335d2009-03-22 21:57:06 +02001152void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_hdr *hdr)
1154{
1155 /*
1156 * We can postpone the mgd.timer whenever receiving unicast frames
1157 * from AP because we know that the connection is working both ways
1158 * at that time. But multicast frames (and hence also beacons) must
1159 * be ignored here, because we need to trigger the timer during
Johannes Bergb291ba12009-07-10 15:29:03 +02001160 * data idle periods for sending the periodic probe request to the
1161 * AP we're connected to.
Kalle Valo3cf335d2009-03-22 21:57:06 +02001162 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001163 if (is_multicast_ether_addr(hdr->addr1))
1164 return;
1165
1166 mod_timer(&sdata->u.mgd.conn_mon_timer,
1167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
Kalle Valo3cf335d2009-03-22 21:57:06 +02001168}
Jiri Bencf0706e822007-05-05 11:45:53 -07001169
Maxim Levitskya43abf22009-07-31 18:54:12 +03001170static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1171{
1172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1173 const u8 *ssid;
1174
1175 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1176 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1177 ssid + 2, ssid[1], NULL, 0);
1178
1179 ifmgd->probe_send_count++;
1180 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1181 run_again(ifmgd, ifmgd->probe_timeout);
1182}
1183
Johannes Bergb291ba12009-07-10 15:29:03 +02001184static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1185 bool beacon)
Kalle Valo04de8382009-03-22 21:57:35 +02001186{
Kalle Valo04de8382009-03-22 21:57:35 +02001187 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +02001188 bool already = false;
Johannes Berg34bfc412009-05-12 19:58:12 +02001189
Johannes Berg0e2b6282009-07-13 13:23:39 +02001190 if (!netif_running(sdata->dev))
1191 return;
1192
Luis R. Rodriguez91a3bd72009-07-23 16:37:47 -07001193 if (sdata->local->scanning)
1194 return;
1195
Johannes Berg77fdaa12009-07-07 03:45:17 +02001196 mutex_lock(&ifmgd->mtx);
1197
1198 if (!ifmgd->associated)
1199 goto out;
1200
Michael Buescha8604022009-04-15 14:41:22 -04001201#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergb291ba12009-07-10 15:29:03 +02001202 if (beacon && net_ratelimit())
1203 printk(KERN_DEBUG "%s: detected beacon loss from AP "
Johannes Berg77fdaa12009-07-07 03:45:17 +02001204 "- sending probe request\n", sdata->dev->name);
Michael Buescha8604022009-04-15 14:41:22 -04001205#endif
Kalle Valo04de8382009-03-22 21:57:35 +02001206
Johannes Bergb291ba12009-07-10 15:29:03 +02001207 /*
1208 * The driver/our work has already reported this event or the
1209 * connection monitoring has kicked in and we have already sent
1210 * a probe request. Or maybe the AP died and the driver keeps
1211 * reporting until we disassociate...
1212 *
1213 * In either case we have to ignore the current call to this
1214 * function (except for setting the correct probe reason bit)
1215 * because otherwise we would reset the timer every time and
1216 * never check whether we received a probe response!
1217 */
1218 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1219 IEEE80211_STA_CONNECTION_POLL))
1220 already = true;
1221
1222 if (beacon)
1223 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1224 else
1225 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1226
1227 if (already)
1228 goto out;
1229
Johannes Berg4e751842009-06-10 15:16:52 +02001230 mutex_lock(&sdata->local->iflist_mtx);
1231 ieee80211_recalc_ps(sdata->local, -1);
1232 mutex_unlock(&sdata->local->iflist_mtx);
1233
Maxim Levitskya43abf22009-07-31 18:54:12 +03001234 ifmgd->probe_send_count = 0;
1235 ieee80211_mgd_probe_ap_send(sdata);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001236 out:
1237 mutex_unlock(&ifmgd->mtx);
Kalle Valo04de8382009-03-22 21:57:35 +02001238}
1239
Johannes Bergb291ba12009-07-10 15:29:03 +02001240void ieee80211_beacon_loss_work(struct work_struct *work)
1241{
1242 struct ieee80211_sub_if_data *sdata =
1243 container_of(work, struct ieee80211_sub_if_data,
1244 u.mgd.beacon_loss_work);
1245
1246 ieee80211_mgd_probe_ap(sdata, true);
1247}
1248
Kalle Valo04de8382009-03-22 21:57:35 +02001249void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1250{
1251 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1252
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001253 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
Kalle Valo04de8382009-03-22 21:57:35 +02001254}
1255EXPORT_SYMBOL(ieee80211_beacon_loss);
1256
Johannes Berg77fdaa12009-07-07 03:45:17 +02001257static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1258 struct ieee80211_mgd_work *wk)
Jiri Bencf0706e822007-05-05 11:45:53 -07001259{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001260 wk->state = IEEE80211_MGD_STATE_IDLE;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001261 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
Jiri Bencf0706e822007-05-05 11:45:53 -07001262}
1263
1264
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001265static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001266 struct ieee80211_mgd_work *wk,
Jiri Bencf0706e822007-05-05 11:45:53 -07001267 struct ieee80211_mgmt *mgmt,
1268 size_t len)
1269{
1270 u8 *pos;
1271 struct ieee802_11_elems elems;
1272
Jiri Bencf0706e822007-05-05 11:45:53 -07001273 pos = mgmt->u.auth.variable;
John W. Linville67a4cce2007-10-12 16:40:37 -04001274 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001275 if (!elems.challenge)
Jiri Bencf0706e822007-05-05 11:45:53 -07001276 return;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001277 ieee80211_send_auth(sdata, 3, wk->auth_alg,
Johannes Berg46900292009-02-15 12:44:28 +01001278 elems.challenge - 2, elems.challenge_len + 2,
Johannes Bergfffd0932009-07-08 14:22:54 +02001279 wk->bss->cbss.bssid,
1280 wk->key, wk->key_len, wk->key_idx);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001281 wk->auth_transaction = 4;
Johannes Bergfe3d2c32009-02-10 21:26:03 +01001282}
1283
Johannes Berg77fdaa12009-07-07 03:45:17 +02001284static enum rx_mgmt_action __must_check
1285ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1286 struct ieee80211_mgd_work *wk,
1287 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e822007-05-05 11:45:53 -07001288{
Jiri Bencf0706e822007-05-05 11:45:53 -07001289 u16 auth_alg, auth_transaction, status_code;
1290
Johannes Berg77fdaa12009-07-07 03:45:17 +02001291 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1292 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001293
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001294 if (len < 24 + 6)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001295 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001296
Johannes Berg77fdaa12009-07-07 03:45:17 +02001297 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1298 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001299
Johannes Berg77fdaa12009-07-07 03:45:17 +02001300 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1301 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001302
1303 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1304 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1305 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1306
Johannes Berg77fdaa12009-07-07 03:45:17 +02001307 if (auth_alg != wk->auth_alg ||
1308 auth_transaction != wk->auth_transaction)
1309 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001310
1311 if (status_code != WLAN_STATUS_SUCCESS) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02001312 list_del(&wk->list);
1313 kfree(wk);
1314 return RX_MGMT_CFG80211_AUTH;
Jiri Bencf0706e822007-05-05 11:45:53 -07001315 }
1316
Johannes Berg77fdaa12009-07-07 03:45:17 +02001317 switch (wk->auth_alg) {
Jiri Bencf0706e822007-05-05 11:45:53 -07001318 case WLAN_AUTH_OPEN:
1319 case WLAN_AUTH_LEAP:
Jouni Malinen636a5d32009-03-19 13:39:22 +02001320 case WLAN_AUTH_FT:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001321 ieee80211_auth_completed(sdata, wk);
1322 return RX_MGMT_CFG80211_AUTH;
Jiri Bencf0706e822007-05-05 11:45:53 -07001323 case WLAN_AUTH_SHARED_KEY:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001324 if (wk->auth_transaction == 4) {
1325 ieee80211_auth_completed(sdata, wk);
1326 return RX_MGMT_CFG80211_AUTH;
Jouni Malinen6039f6d2009-03-19 13:39:21 +02001327 } else
Johannes Berg77fdaa12009-07-07 03:45:17 +02001328 ieee80211_auth_challenge(sdata, wk, mgmt, len);
Jiri Bencf0706e822007-05-05 11:45:53 -07001329 break;
1330 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02001331
1332 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001333}
1334
1335
Johannes Berg77fdaa12009-07-07 03:45:17 +02001336static enum rx_mgmt_action __must_check
1337ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1338 struct ieee80211_mgd_work *wk,
1339 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e822007-05-05 11:45:53 -07001340{
Johannes Berg46900292009-02-15 12:44:28 +01001341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001342 const u8 *bssid = NULL;
Jiri Bencf0706e822007-05-05 11:45:53 -07001343 u16 reason_code;
1344
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001345 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001346 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001347
Johannes Berg77fdaa12009-07-07 03:45:17 +02001348 ASSERT_MGD_MTX(ifmgd);
1349
1350 if (wk)
1351 bssid = wk->bss->cbss.bssid;
1352 else
1353 bssid = ifmgd->associated->cbss.bssid;
Jiri Bencf0706e822007-05-05 11:45:53 -07001354
1355 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1356
Johannes Berg77fdaa12009-07-07 03:45:17 +02001357 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1358 sdata->dev->name, bssid, reason_code);
Jiri Bencf0706e822007-05-05 11:45:53 -07001359
Johannes Berg77fdaa12009-07-07 03:45:17 +02001360 if (!wk) {
Johannes Berge21546a2009-08-06 20:41:32 +02001361 ieee80211_set_disassoc(sdata, true);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001362 } else {
1363 list_del(&wk->list);
1364 kfree(wk);
1365 }
1366
1367 return RX_MGMT_CFG80211_DEAUTH;
Jiri Bencf0706e822007-05-05 11:45:53 -07001368}
1369
1370
Johannes Berg77fdaa12009-07-07 03:45:17 +02001371static enum rx_mgmt_action __must_check
1372ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1373 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e822007-05-05 11:45:53 -07001374{
Johannes Berg46900292009-02-15 12:44:28 +01001375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e822007-05-05 11:45:53 -07001376 u16 reason_code;
1377
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001378 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001379 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001380
Johannes Berg77fdaa12009-07-07 03:45:17 +02001381 ASSERT_MGD_MTX(ifmgd);
1382
1383 if (WARN_ON(!ifmgd->associated))
1384 return RX_MGMT_NONE;
1385
1386 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1387 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001388
1389 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1390
Johannes Berg77fdaa12009-07-07 03:45:17 +02001391 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1392 sdata->dev->name, reason_code);
Jiri Bencf0706e822007-05-05 11:45:53 -07001393
Johannes Berge21546a2009-08-06 20:41:32 +02001394 ieee80211_set_disassoc(sdata, false);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001395 return RX_MGMT_CFG80211_DISASSOC;
Jiri Bencf0706e822007-05-05 11:45:53 -07001396}
1397
1398
Johannes Berg77fdaa12009-07-07 03:45:17 +02001399static enum rx_mgmt_action __must_check
1400ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1401 struct ieee80211_mgd_work *wk,
1402 struct ieee80211_mgmt *mgmt, size_t len,
1403 bool reassoc)
Jiri Bencf0706e822007-05-05 11:45:53 -07001404{
Johannes Berg46900292009-02-15 12:44:28 +01001405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001406 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001407 struct ieee80211_supported_band *sband;
Jiri Bencf0706e822007-05-05 11:45:53 -07001408 struct sta_info *sta;
Johannes Berg881d9482009-01-21 15:13:48 +01001409 u32 rates, basic_rates;
Jiri Bencf0706e822007-05-05 11:45:53 -07001410 u16 capab_info, status_code, aid;
1411 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02001412 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Bencf0706e822007-05-05 11:45:53 -07001413 u8 *pos;
Johannes Bergae5eb022008-10-14 16:58:37 +02001414 u32 changed = 0;
Jiri Bencf0706e822007-05-05 11:45:53 -07001415 int i, j;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001416 bool have_higher_than_11mbit = false, newsta = false;
Johannes Bergae5eb022008-10-14 16:58:37 +02001417 u16 ap_ht_cap_flags;
Jiri Bencf0706e822007-05-05 11:45:53 -07001418
Johannes Berg77fdaa12009-07-07 03:45:17 +02001419 /*
1420 * AssocResp and ReassocResp have identical structure, so process both
1421 * of them in this function.
1422 */
Jiri Bencf0706e822007-05-05 11:45:53 -07001423
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001424 if (len < 24 + 6)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001425 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001426
Johannes Berg77fdaa12009-07-07 03:45:17 +02001427 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1428 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001429
1430 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1431 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1432 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Jiri Bencf0706e822007-05-05 11:45:53 -07001433
Johannes Berg0c68ae262008-10-27 15:56:10 -07001434 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
Jiri Bencf0706e822007-05-05 11:45:53 -07001435 "status=%d aid=%d)\n",
Johannes Berg0c68ae262008-10-27 15:56:10 -07001436 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
Johannes Bergddd68582007-10-22 14:51:37 +02001437 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
Jiri Bencf0706e822007-05-05 11:45:53 -07001438
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001439 pos = mgmt->u.assoc_resp.variable;
1440 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1441
1442 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
Jouni Malinenf797eb72009-01-19 18:48:46 +02001443 elems.timeout_int && elems.timeout_int_len == 5 &&
1444 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001445 u32 tu, ms;
Jouni Malinenf797eb72009-01-19 18:48:46 +02001446 tu = get_unaligned_le32(elems.timeout_int + 1);
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001447 ms = tu * 1024 / 1000;
1448 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1449 "comeback duration %u TU (%u ms)\n",
1450 sdata->dev->name, tu, ms);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001451 wk->timeout = jiffies + msecs_to_jiffies(ms);
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001452 if (ms > IEEE80211_ASSOC_TIMEOUT)
Johannes Bergca386f32009-07-10 02:39:48 +02001453 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
Johannes Berg77fdaa12009-07-07 03:45:17 +02001454 return RX_MGMT_NONE;
Jouni Malinen63a5ab82009-01-08 13:32:09 +02001455 }
1456
Jiri Bencf0706e822007-05-05 11:45:53 -07001457 if (status_code != WLAN_STATUS_SUCCESS) {
1458 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001459 sdata->dev->name, status_code);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001460 list_del(&wk->list);
1461 kfree(wk);
1462 return RX_MGMT_CFG80211_ASSOC;
Jiri Bencf0706e822007-05-05 11:45:53 -07001463 }
1464
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001465 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1466 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001467 "set\n", sdata->dev->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001468 aid &= ~(BIT(15) | BIT(14));
1469
Jiri Bencf0706e822007-05-05 11:45:53 -07001470 if (!elems.supp_rates) {
1471 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001472 sdata->dev->name);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001473 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001474 }
1475
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001476 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
Johannes Berg46900292009-02-15 12:44:28 +01001477 ifmgd->aid = aid;
Jiri Bencf0706e822007-05-05 11:45:53 -07001478
Johannes Bergd0709a62008-02-25 16:27:46 +01001479 rcu_read_lock();
1480
Jiri Bencf0706e822007-05-05 11:45:53 -07001481 /* Add STA entry for the AP */
Johannes Berg77fdaa12009-07-07 03:45:17 +02001482 sta = sta_info_get(local, wk->bss->cbss.bssid);
Jiri Bencf0706e822007-05-05 11:45:53 -07001483 if (!sta) {
Johannes Bergddf4ac52008-10-22 11:41:38 +02001484 newsta = true;
Johannes Bergd0709a62008-02-25 16:27:46 +01001485
Johannes Berg77fdaa12009-07-07 03:45:17 +02001486 rcu_read_unlock();
1487
1488 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
Johannes Berg73651ee2008-02-25 16:27:47 +01001489 if (!sta) {
1490 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001491 " the AP\n", sdata->dev->name);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001492 return RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001493 }
Johannes Berg73651ee2008-02-25 16:27:47 +01001494
Johannes Berg77fdaa12009-07-07 03:45:17 +02001495 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1496 WLAN_STA_ASSOC_AP);
1497 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1498 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1499
1500 rcu_read_lock();
Jiri Bencf0706e822007-05-05 11:45:53 -07001501 }
1502
Jiri Bencf0706e822007-05-05 11:45:53 -07001503 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001504 basic_rates = 0;
1505 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1506
Jiri Bencf0706e822007-05-05 11:45:53 -07001507 for (i = 0; i < elems.supp_rates_len; i++) {
1508 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001509 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001510
1511 if (rate > 110)
1512 have_higher_than_11mbit = true;
1513
1514 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001515 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e822007-05-05 11:45:53 -07001516 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001517 if (is_basic)
1518 basic_rates |= BIT(j);
1519 break;
1520 }
Johannes Berg8318d782008-01-24 19:38:38 +01001521 }
Jiri Bencf0706e822007-05-05 11:45:53 -07001522 }
Johannes Berg8318d782008-01-24 19:38:38 +01001523
Jiri Bencf0706e822007-05-05 11:45:53 -07001524 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1525 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Johannes Berg7e0986c2009-04-19 13:22:11 +02001526 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001527
1528 if (rate > 110)
1529 have_higher_than_11mbit = true;
1530
1531 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001532 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e822007-05-05 11:45:53 -07001533 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001534 if (is_basic)
1535 basic_rates |= BIT(j);
1536 break;
1537 }
Johannes Berg8318d782008-01-24 19:38:38 +01001538 }
Jiri Bencf0706e822007-05-05 11:45:53 -07001539 }
Johannes Berg8318d782008-01-24 19:38:38 +01001540
Johannes Berg323ce792008-09-11 02:45:11 +02001541 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Johannes Bergbda39332008-10-11 01:51:51 +02001542 sdata->vif.bss_conf.basic_rates = basic_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01001543
1544 /* cf. IEEE 802.11 9.2.12 */
1545 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1546 have_higher_than_11mbit)
1547 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1548 else
1549 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001550
Johannes Bergab1faea2009-07-01 21:41:17 +02001551 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001552 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02001553 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02001554
1555 ap_ht_cap_flags = sta->sta.ht_cap.cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001556
Johannes Berg4b7679a2008-09-18 18:14:18 +02001557 rate_control_rate_init(sta);
Jiri Bencf0706e822007-05-05 11:45:53 -07001558
Johannes Berg46900292009-02-15 12:44:28 +01001559 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
Jouni Malinen5394af42009-01-08 13:31:59 +02001560 set_sta_flags(sta, WLAN_STA_MFP);
1561
Johannes Bergddf4ac52008-10-22 11:41:38 +02001562 if (elems.wmm_param)
Johannes Berg07346f812008-05-03 01:02:02 +02001563 set_sta_flags(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02001564
1565 if (newsta) {
1566 int err = sta_info_insert(sta);
1567 if (err) {
1568 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1569 " the AP (error %d)\n", sdata->dev->name, err);
1570 rcu_read_unlock();
Johannes Berg77fdaa12009-07-07 03:45:17 +02001571 return RX_MGMT_NONE;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001572 }
1573 }
1574
1575 rcu_read_unlock();
1576
1577 if (elems.wmm_param)
Johannes Berg46900292009-02-15 12:44:28 +01001578 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
Jiri Bencf0706e822007-05-05 11:45:53 -07001579 elems.wmm_param_len);
Johannes Bergaa837e12009-05-07 16:16:24 +02001580 else
1581 ieee80211_set_wmm_default(sdata);
Jiri Bencf0706e822007-05-05 11:45:53 -07001582
Johannes Bergae5eb022008-10-14 16:58:37 +02001583 if (elems.ht_info_elem && elems.wmm_param &&
Johannes Berg46900292009-02-15 12:44:28 +01001584 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001585 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001586 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001587 wk->bss->cbss.bssid,
Johannes Bergae5eb022008-10-14 16:58:37 +02001588 ap_ht_cap_flags);
1589
Johannes Berg056508d2009-07-30 21:43:55 +02001590 /* delete work item -- must be before set_associated for PS */
1591 list_del(&wk->list);
1592
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001593 /* set AID and assoc capability,
1594 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01001595 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001596 bss_conf->assoc_capability = capab_info;
Johannes Berge21546a2009-08-06 20:41:32 +02001597 /* this will take ownership of wk */
1598 ieee80211_set_associated(sdata, wk, changed);
Jiri Bencf0706e822007-05-05 11:45:53 -07001599
Kalle Valo15b7b062009-03-22 21:57:14 +02001600 /*
Johannes Bergb291ba12009-07-10 15:29:03 +02001601 * Start timer to probe the connection to the AP now.
1602 * Also start the timer that will detect beacon loss.
Kalle Valo15b7b062009-03-22 21:57:14 +02001603 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001604 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1605 mod_beacon_timer(sdata);
Kalle Valo15b7b062009-03-22 21:57:14 +02001606
Johannes Berg77fdaa12009-07-07 03:45:17 +02001607 return RX_MGMT_CFG80211_ASSOC;
Jiri Bencf0706e822007-05-05 11:45:53 -07001608}
1609
1610
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001611static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e822007-05-05 11:45:53 -07001612 struct ieee80211_mgmt *mgmt,
1613 size_t len,
1614 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001615 struct ieee802_11_elems *elems,
1616 bool beacon)
Jiri Bencf0706e822007-05-05 11:45:53 -07001617{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001618 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001619 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02001620 struct ieee80211_bss *bss;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01001621 struct ieee80211_channel *channel;
Jiri Bencf0706e822007-05-05 11:45:53 -07001622
Johannes Berg5bda6172008-09-08 11:05:10 +02001623 if (elems->ds_params && elems->ds_params_len == 1)
1624 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1625 else
1626 freq = rx_status->freq;
1627
1628 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1629
1630 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1631 return;
Jiri Bencf0706e822007-05-05 11:45:53 -07001632
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001633 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
Johannes Berg2a519312009-02-10 21:25:55 +01001634 channel, beacon);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001635 if (bss)
1636 ieee80211_rx_bss_put(local, bss);
1637
1638 if (!sdata->u.mgd.associated)
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001639 return;
Jiri Bencf0706e822007-05-05 11:45:53 -07001640
Sujithc481ec92009-01-06 09:28:37 +05301641 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
Johannes Berg77fdaa12009-07-07 03:45:17 +02001642 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1643 ETH_ALEN) == 0)) {
Sujithc481ec92009-01-06 09:28:37 +05301644 struct ieee80211_channel_sw_ie *sw_elem =
1645 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
Johannes Bergcc32abd2009-05-15 11:52:31 +02001646 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
Sujithc481ec92009-01-06 09:28:37 +05301647 }
Jiri Bencf0706e822007-05-05 11:45:53 -07001648}
1649
1650
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001651static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001652 struct ieee80211_mgd_work *wk,
1653 struct ieee80211_mgmt *mgmt, size_t len,
Jiri Bencf0706e822007-05-05 11:45:53 -07001654 struct ieee80211_rx_status *rx_status)
1655{
Kalle Valo15b7b062009-03-22 21:57:14 +02001656 struct ieee80211_if_managed *ifmgd;
Ester Kummerae6a44e2008-06-27 18:54:48 +03001657 size_t baselen;
1658 struct ieee802_11_elems elems;
1659
Kalle Valo15b7b062009-03-22 21:57:14 +02001660 ifmgd = &sdata->u.mgd;
1661
Johannes Berg77fdaa12009-07-07 03:45:17 +02001662 ASSERT_MGD_MTX(ifmgd);
1663
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03001664 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1665 return; /* ignore ProbeResp to foreign address */
1666
Ester Kummerae6a44e2008-06-27 18:54:48 +03001667 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1668 if (baselen > len)
1669 return;
1670
1671 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1672 &elems);
1673
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001674 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001675
1676 /* direct probe may be part of the association flow */
Johannes Berg77fdaa12009-07-07 03:45:17 +02001677 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001678 printk(KERN_DEBUG "%s direct probe responded\n",
1679 sdata->dev->name);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001680 wk->tries = 0;
1681 wk->state = IEEE80211_MGD_STATE_AUTH;
1682 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001683 }
Kalle Valo15b7b062009-03-22 21:57:14 +02001684
Johannes Berg77fdaa12009-07-07 03:45:17 +02001685 if (ifmgd->associated &&
1686 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
Johannes Bergb291ba12009-07-10 15:29:03 +02001687 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1688 IEEE80211_STA_CONNECTION_POLL)) {
1689 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1690 IEEE80211_STA_BEACON_POLL);
Johannes Berg4e751842009-06-10 15:16:52 +02001691 mutex_lock(&sdata->local->iflist_mtx);
1692 ieee80211_recalc_ps(sdata->local, -1);
1693 mutex_unlock(&sdata->local->iflist_mtx);
Johannes Bergb291ba12009-07-10 15:29:03 +02001694 /*
1695 * We've received a probe response, but are not sure whether
1696 * we have or will be receiving any beacons or data, so let's
1697 * schedule the timers again, just in case.
1698 */
1699 mod_beacon_timer(sdata);
1700 mod_timer(&ifmgd->conn_mon_timer,
1701 round_jiffies_up(jiffies +
1702 IEEE80211_CONNECTION_IDLE_TIME));
Johannes Berg4e751842009-06-10 15:16:52 +02001703 }
Jiri Bencf0706e822007-05-05 11:45:53 -07001704}
1705
Johannes Bergd91f36d2009-04-16 13:17:26 +02001706/*
1707 * This is the canonical list of information elements we care about,
1708 * the filter code also gives us all changes to the Microsoft OUI
1709 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1710 *
1711 * We implement beacon filtering in software since that means we can
1712 * avoid processing the frame here and in cfg80211, and userspace
1713 * will not be able to tell whether the hardware supports it or not.
1714 *
1715 * XXX: This list needs to be dynamic -- userspace needs to be able to
1716 * add items it requires. It also needs to be able to tell us to
1717 * look out for other vendor IEs.
1718 */
1719static const u64 care_about_ies =
Johannes Berg1d4df3a2009-04-22 11:25:43 +02001720 (1ULL << WLAN_EID_COUNTRY) |
1721 (1ULL << WLAN_EID_ERP_INFO) |
1722 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1723 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1724 (1ULL << WLAN_EID_HT_CAPABILITY) |
1725 (1ULL << WLAN_EID_HT_INFORMATION);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001726
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001727static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e822007-05-05 11:45:53 -07001728 struct ieee80211_mgmt *mgmt,
1729 size_t len,
1730 struct ieee80211_rx_status *rx_status)
1731{
Johannes Bergd91f36d2009-04-16 13:17:26 +02001732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e822007-05-05 11:45:53 -07001733 size_t baselen;
1734 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001735 struct ieee80211_local *local = sdata->local;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001736 u32 changed = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001737 bool erp_valid, directed_tim = false;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001738 u8 erp_value = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001739 u32 ncrc;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001740 u8 *bssid;
1741
1742 ASSERT_MGD_MTX(ifmgd);
Jiri Bencf0706e822007-05-05 11:45:53 -07001743
Ester Kummerae6a44e2008-06-27 18:54:48 +03001744 /* Process beacon from the current BSS */
1745 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1746 if (baselen > len)
1747 return;
1748
Johannes Bergd91f36d2009-04-16 13:17:26 +02001749 if (rx_status->freq != local->hw.conf.channel->center_freq)
Jiri Bencf0706e822007-05-05 11:45:53 -07001750 return;
Jiri Bencf0706e822007-05-05 11:45:53 -07001751
Johannes Bergb291ba12009-07-10 15:29:03 +02001752 /*
1753 * We might have received a number of frames, among them a
1754 * disassoc frame and a beacon...
1755 */
1756 if (!ifmgd->associated)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001757 return;
1758
1759 bssid = ifmgd->associated->cbss.bssid;
1760
Johannes Bergb291ba12009-07-10 15:29:03 +02001761 /*
1762 * And in theory even frames from a different AP we were just
1763 * associated to a split-second ago!
1764 */
1765 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e822007-05-05 11:45:53 -07001766 return;
1767
Johannes Bergb291ba12009-07-10 15:29:03 +02001768 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
Jouni Malinen92778182009-05-14 21:15:36 +03001769#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1770 if (net_ratelimit()) {
1771 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1772 "to a received beacon\n", sdata->dev->name);
1773 }
1774#endif
Johannes Bergb291ba12009-07-10 15:29:03 +02001775 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
Johannes Berg4e751842009-06-10 15:16:52 +02001776 mutex_lock(&local->iflist_mtx);
1777 ieee80211_recalc_ps(local, -1);
1778 mutex_unlock(&local->iflist_mtx);
Jouni Malinen92778182009-05-14 21:15:36 +03001779 }
1780
Johannes Bergb291ba12009-07-10 15:29:03 +02001781 /*
1782 * Push the beacon loss detection into the future since
1783 * we are processing a beacon from the AP just now.
1784 */
1785 mod_beacon_timer(sdata);
1786
Johannes Bergd91f36d2009-04-16 13:17:26 +02001787 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1788 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1789 len - baselen, &elems,
1790 care_about_ies, ncrc);
1791
1792 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
Johannes Berge7ec86f2009-04-18 17:33:24 +02001793 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1794 ifmgd->aid);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001795
Jouni Malinen30196672009-05-19 17:01:43 +03001796 if (ncrc != ifmgd->beacon_crc) {
1797 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1798 true);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001799
Jouni Malinen30196672009-05-19 17:01:43 +03001800 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1801 elems.wmm_param_len);
1802 }
Johannes Bergfe3fa822008-09-08 11:05:09 +02001803
Vivek Natarajan25c9c872009-03-02 20:20:30 +05301804 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
Kalle Valo1fb36062009-02-10 17:09:24 +02001805 if (directed_tim) {
Kalle Valo572e0012009-02-10 17:09:31 +02001806 if (local->hw.conf.dynamic_ps_timeout > 0) {
1807 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1808 ieee80211_hw_config(local,
1809 IEEE80211_CONF_CHANGE_PS);
1810 ieee80211_send_nullfunc(local, sdata, 0);
1811 } else {
1812 local->pspolling = true;
1813
1814 /*
1815 * Here is assumed that the driver will be
1816 * able to send ps-poll frame and receive a
1817 * response even though power save mode is
1818 * enabled, but some drivers might require
1819 * to disable power save here. This needs
1820 * to be investigated.
1821 */
1822 ieee80211_send_pspoll(local, sdata);
1823 }
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001824 }
1825 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001826
Jouni Malinen30196672009-05-19 17:01:43 +03001827 if (ncrc == ifmgd->beacon_crc)
1828 return;
1829 ifmgd->beacon_crc = ncrc;
1830
Johannes Berg7a5158e2008-10-08 10:59:33 +02001831 if (elems.erp_info && elems.erp_info_len >= 1) {
1832 erp_valid = true;
1833 erp_value = elems.erp_info[0];
1834 } else {
1835 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04001836 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001837 changed |= ieee80211_handle_bss_capability(sdata,
1838 le16_to_cpu(mgmt->u.beacon.capab_info),
1839 erp_valid, erp_value);
Jiri Bencf0706e822007-05-05 11:45:53 -07001840
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001841
Vasanthakumar Thiagarajan53d6f812009-02-11 22:18:49 +05301842 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001843 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001844 struct sta_info *sta;
1845 struct ieee80211_supported_band *sband;
1846 u16 ap_ht_cap_flags;
1847
1848 rcu_read_lock();
1849
Johannes Berg77fdaa12009-07-07 03:45:17 +02001850 sta = sta_info_get(local, bssid);
1851 if (WARN_ON(!sta)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001852 rcu_read_unlock();
1853 return;
1854 }
1855
1856 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1857
1858 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1859 elems.ht_cap_elem, &sta->sta.ht_cap);
1860
1861 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1862
1863 rcu_read_unlock();
1864
1865 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001866 bssid, ap_ht_cap_flags);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001867 }
1868
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07001869 /* Note: country IE parsing is done for us by cfg80211 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001870 if (elems.country_elem) {
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301871 /* TODO: IBSS also needs this */
1872 if (elems.pwr_constr_elem)
1873 ieee80211_handle_pwr_constr(sdata,
1874 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1875 elems.pwr_constr_elem,
1876 elems.pwr_constr_elem_len);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001877 }
1878
Johannes Berg471b3ef2007-12-28 14:32:58 +01001879 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e822007-05-05 11:45:53 -07001880}
1881
Johannes Berg46900292009-02-15 12:44:28 +01001882ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
Johannes Bergf1d58c22009-06-17 13:13:00 +02001883 struct sk_buff *skb)
Jiri Bencf0706e822007-05-05 11:45:53 -07001884{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001885 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e822007-05-05 11:45:53 -07001886 struct ieee80211_mgmt *mgmt;
1887 u16 fc;
1888
1889 if (skb->len < 24)
Johannes Berg46900292009-02-15 12:44:28 +01001890 return RX_DROP_MONITOR;
Jiri Bencf0706e822007-05-05 11:45:53 -07001891
1892 mgmt = (struct ieee80211_mgmt *) skb->data;
1893 fc = le16_to_cpu(mgmt->frame_control);
1894
1895 switch (fc & IEEE80211_FCTL_STYPE) {
1896 case IEEE80211_STYPE_PROBE_REQ:
1897 case IEEE80211_STYPE_PROBE_RESP:
1898 case IEEE80211_STYPE_BEACON:
Jiri Bencf0706e822007-05-05 11:45:53 -07001899 case IEEE80211_STYPE_AUTH:
1900 case IEEE80211_STYPE_ASSOC_RESP:
1901 case IEEE80211_STYPE_REASSOC_RESP:
1902 case IEEE80211_STYPE_DEAUTH:
1903 case IEEE80211_STYPE_DISASSOC:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001904 case IEEE80211_STYPE_ACTION:
Johannes Berg46900292009-02-15 12:44:28 +01001905 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001906 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
Johannes Berg46900292009-02-15 12:44:28 +01001907 return RX_QUEUED;
Jiri Bencf0706e822007-05-05 11:45:53 -07001908 }
1909
Johannes Berg46900292009-02-15 12:44:28 +01001910 return RX_DROP_MONITOR;
Jiri Bencf0706e822007-05-05 11:45:53 -07001911}
1912
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001913static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e822007-05-05 11:45:53 -07001914 struct sk_buff *skb)
1915{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e822007-05-05 11:45:53 -07001917 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e822007-05-05 11:45:53 -07001918 struct ieee80211_mgmt *mgmt;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001919 struct ieee80211_mgd_work *wk;
1920 enum rx_mgmt_action rma = RX_MGMT_NONE;
Jiri Bencf0706e822007-05-05 11:45:53 -07001921 u16 fc;
1922
Jiri Bencf0706e822007-05-05 11:45:53 -07001923 rx_status = (struct ieee80211_rx_status *) skb->cb;
1924 mgmt = (struct ieee80211_mgmt *) skb->data;
1925 fc = le16_to_cpu(mgmt->frame_control);
1926
Johannes Berg77fdaa12009-07-07 03:45:17 +02001927 mutex_lock(&ifmgd->mtx);
1928
1929 if (ifmgd->associated &&
1930 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1931 ETH_ALEN) == 0) {
1932 switch (fc & IEEE80211_FCTL_STYPE) {
1933 case IEEE80211_STYPE_BEACON:
1934 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1935 rx_status);
1936 break;
1937 case IEEE80211_STYPE_PROBE_RESP:
1938 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1939 skb->len, rx_status);
1940 break;
1941 case IEEE80211_STYPE_DEAUTH:
1942 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1943 mgmt, skb->len);
1944 break;
1945 case IEEE80211_STYPE_DISASSOC:
1946 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1947 break;
1948 case IEEE80211_STYPE_ACTION:
1949 /* XXX: differentiate, can only happen for CSA now! */
1950 ieee80211_sta_process_chanswitch(sdata,
1951 &mgmt->u.action.u.chan_switch.sw_elem,
1952 ifmgd->associated);
1953 break;
1954 }
1955 mutex_unlock(&ifmgd->mtx);
1956
1957 switch (rma) {
1958 case RX_MGMT_NONE:
1959 /* no action */
1960 break;
1961 case RX_MGMT_CFG80211_DEAUTH:
Johannes Berg667503d2009-07-07 03:56:11 +02001962 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1963 NULL);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001964 break;
1965 case RX_MGMT_CFG80211_DISASSOC:
Johannes Berg667503d2009-07-07 03:56:11 +02001966 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1967 NULL);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001968 break;
1969 default:
1970 WARN(1, "unexpected: %d", rma);
1971 }
1972 goto out;
1973 }
1974
1975 list_for_each_entry(wk, &ifmgd->work_list, list) {
1976 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1977 continue;
1978
1979 switch (fc & IEEE80211_FCTL_STYPE) {
1980 case IEEE80211_STYPE_PROBE_RESP:
1981 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1982 rx_status);
1983 break;
1984 case IEEE80211_STYPE_AUTH:
1985 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1986 break;
1987 case IEEE80211_STYPE_ASSOC_RESP:
1988 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1989 skb->len, false);
1990 break;
1991 case IEEE80211_STYPE_REASSOC_RESP:
1992 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1993 skb->len, true);
1994 break;
1995 case IEEE80211_STYPE_DEAUTH:
1996 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1997 skb->len);
1998 break;
1999 }
2000 /*
2001 * We've processed this frame for that work, so it can't
2002 * belong to another work struct.
2003 * NB: this is also required for correctness because the
2004 * called functions can free 'wk', and for 'rma'!
2005 */
Johannes Berg46900292009-02-15 12:44:28 +01002006 break;
Jiri Bencf0706e822007-05-05 11:45:53 -07002007 }
2008
Johannes Berg77fdaa12009-07-07 03:45:17 +02002009 mutex_unlock(&ifmgd->mtx);
2010
2011 switch (rma) {
2012 case RX_MGMT_NONE:
2013 /* no action */
2014 break;
2015 case RX_MGMT_CFG80211_AUTH:
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002016 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002017 break;
2018 case RX_MGMT_CFG80211_ASSOC:
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002019 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002020 break;
Johannes Berg8d8b2612009-07-25 11:58:36 +02002021 case RX_MGMT_CFG80211_DEAUTH:
2022 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
2023 break;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002024 default:
2025 WARN(1, "unexpected: %d", rma);
2026 }
2027
2028 out:
Jiri Bencf0706e822007-05-05 11:45:53 -07002029 kfree_skb(skb);
2030}
2031
Johannes Berg9c6bd792008-09-11 00:01:52 +02002032static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e822007-05-05 11:45:53 -07002033{
2034 struct ieee80211_sub_if_data *sdata =
2035 (struct ieee80211_sub_if_data *) data;
Johannes Berg46900292009-02-15 12:44:28 +01002036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002037 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e822007-05-05 11:45:53 -07002038
Johannes Berg5bb644a2009-05-17 11:40:42 +02002039 if (local->quiescing) {
2040 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2041 return;
2042 }
2043
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002044 ieee80211_queue_work(&local->hw, &ifmgd->work);
Jiri Bencf0706e822007-05-05 11:45:53 -07002045}
2046
Johannes Berg9c6bd792008-09-11 00:01:52 +02002047static void ieee80211_sta_work(struct work_struct *work)
Johannes Berg60f8b392008-09-08 17:44:22 +02002048{
2049 struct ieee80211_sub_if_data *sdata =
Johannes Berg46900292009-02-15 12:44:28 +01002050 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
Johannes Berg60f8b392008-09-08 17:44:22 +02002051 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01002052 struct ieee80211_if_managed *ifmgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02002053 struct sk_buff *skb;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002054 struct ieee80211_mgd_work *wk, *tmp;
2055 LIST_HEAD(free_work);
2056 enum rx_mgmt_action rma;
2057 bool anybusy = false;
Johannes Berg60f8b392008-09-08 17:44:22 +02002058
2059 if (!netif_running(sdata->dev))
2060 return;
2061
Helmut Schaafbe9c422009-07-23 12:14:04 +02002062 if (local->scanning)
Johannes Berg60f8b392008-09-08 17:44:22 +02002063 return;
2064
Johannes Berg46900292009-02-15 12:44:28 +01002065 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
Johannes Berg60f8b392008-09-08 17:44:22 +02002066 return;
Johannes Berg5bb644a2009-05-17 11:40:42 +02002067
2068 /*
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002069 * ieee80211_queue_work() should have picked up most cases,
2070 * here we'll pick the the rest.
Johannes Berg5bb644a2009-05-17 11:40:42 +02002071 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002072 if (WARN(local->suspended, "STA MLME work scheduled while "
2073 "going to suspend\n"))
Johannes Berg5bb644a2009-05-17 11:40:42 +02002074 return;
2075
Johannes Berg46900292009-02-15 12:44:28 +01002076 ifmgd = &sdata->u.mgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02002077
Johannes Berg77fdaa12009-07-07 03:45:17 +02002078 /* first process frames to avoid timing out while a frame is pending */
Johannes Berg46900292009-02-15 12:44:28 +01002079 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
Johannes Berg60f8b392008-09-08 17:44:22 +02002080 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2081
Johannes Berg77fdaa12009-07-07 03:45:17 +02002082 /* then process the rest of the work */
2083 mutex_lock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02002084
Johannes Bergb291ba12009-07-10 15:29:03 +02002085 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2086 IEEE80211_STA_CONNECTION_POLL) &&
2087 ifmgd->associated) {
Maxim Levitskya43abf22009-07-31 18:54:12 +03002088 u8 bssid[ETH_ALEN];
2089
2090 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
Johannes Bergb291ba12009-07-10 15:29:03 +02002091 if (time_is_after_jiffies(ifmgd->probe_timeout))
2092 run_again(ifmgd, ifmgd->probe_timeout);
Maxim Levitskya43abf22009-07-31 18:54:12 +03002093
2094 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2095#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2096 printk(KERN_DEBUG "No probe response from AP %pM"
2097 " after %dms, try %d\n", bssid,
2098 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2099 ifmgd->probe_send_count);
2100#endif
2101 ieee80211_mgd_probe_ap_send(sdata);
2102 } else {
Johannes Bergb291ba12009-07-10 15:29:03 +02002103 /*
2104 * We actually lost the connection ... or did we?
2105 * Let's make sure!
2106 */
2107 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2108 IEEE80211_STA_BEACON_POLL);
Johannes Bergb291ba12009-07-10 15:29:03 +02002109 printk(KERN_DEBUG "No probe response from AP %pM"
2110 " after %dms, disconnecting.\n",
2111 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
Johannes Berge21546a2009-08-06 20:41:32 +02002112 ieee80211_set_disassoc(sdata, true);
Johannes Bergb291ba12009-07-10 15:29:03 +02002113 mutex_unlock(&ifmgd->mtx);
2114 /*
2115 * must be outside lock due to cfg80211,
2116 * but that's not a problem.
2117 */
2118 ieee80211_send_deauth_disassoc(sdata, bssid,
2119 IEEE80211_STYPE_DEAUTH,
2120 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2121 NULL);
2122 mutex_lock(&ifmgd->mtx);
2123 }
2124 }
2125
Johannes Berg60f8b392008-09-08 17:44:22 +02002126
Johannes Berg5cff20e2009-04-29 12:26:17 +02002127 ieee80211_recalc_idle(local);
2128
Johannes Berg77fdaa12009-07-07 03:45:17 +02002129 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
Johannes Bergca386f32009-07-10 02:39:48 +02002130 if (time_is_after_jiffies(wk->timeout)) {
2131 /*
2132 * This work item isn't supposed to be worked on
2133 * right now, but take care to adjust the timer
2134 * properly.
2135 */
2136 run_again(ifmgd, wk->timeout);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002137 continue;
Johannes Bergca386f32009-07-10 02:39:48 +02002138 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02002139
2140 switch (wk->state) {
2141 default:
2142 WARN_ON(1);
2143 /* fall through */
2144 case IEEE80211_MGD_STATE_IDLE:
2145 /* nothing */
2146 rma = RX_MGMT_NONE;
2147 break;
2148 case IEEE80211_MGD_STATE_PROBE:
2149 rma = ieee80211_direct_probe(sdata, wk);
2150 break;
2151 case IEEE80211_MGD_STATE_AUTH:
2152 rma = ieee80211_authenticate(sdata, wk);
2153 break;
2154 case IEEE80211_MGD_STATE_ASSOC:
2155 rma = ieee80211_associate(sdata, wk);
2156 break;
2157 }
2158
2159 switch (rma) {
2160 case RX_MGMT_NONE:
2161 /* no action required */
2162 break;
2163 case RX_MGMT_CFG80211_AUTH_TO:
2164 case RX_MGMT_CFG80211_ASSOC_TO:
2165 list_del(&wk->list);
2166 list_add(&wk->list, &free_work);
2167 wk->tries = rma; /* small abuse but only local */
2168 break;
2169 default:
2170 WARN(1, "unexpected: %d", rma);
2171 }
2172 }
2173
Jouni Malinen5bf6fcc2009-08-25 17:44:28 +03002174 list_for_each_entry(wk, &ifmgd->work_list, list) {
2175 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2176 anybusy = true;
2177 break;
2178 }
2179 }
2180 if (!anybusy &&
2181 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2182 ieee80211_queue_delayed_work(&local->hw,
2183 &local->scan_work,
2184 round_jiffies_relative(0));
2185
Johannes Berg77fdaa12009-07-07 03:45:17 +02002186 mutex_unlock(&ifmgd->mtx);
2187
2188 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2189 switch (wk->tries) {
2190 case RX_MGMT_CFG80211_AUTH_TO:
2191 cfg80211_send_auth_timeout(sdata->dev,
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002192 wk->bss->cbss.bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002193 break;
2194 case RX_MGMT_CFG80211_ASSOC_TO:
Johannes Bergcb0b4be2009-07-07 03:56:07 +02002195 cfg80211_send_assoc_timeout(sdata->dev,
2196 wk->bss->cbss.bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002197 break;
2198 default:
2199 WARN(1, "unexpected: %d", wk->tries);
2200 }
2201
2202 list_del(&wk->list);
2203 kfree(wk);
2204 }
2205
2206 ieee80211_recalc_idle(local);
Johannes Berg60f8b392008-09-08 17:44:22 +02002207}
Johannes Berg0a51b272008-09-08 17:44:25 +02002208
Johannes Bergb291ba12009-07-10 15:29:03 +02002209static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2210{
2211 struct ieee80211_sub_if_data *sdata =
2212 (struct ieee80211_sub_if_data *) data;
2213 struct ieee80211_local *local = sdata->local;
2214
2215 if (local->quiescing)
2216 return;
2217
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002218 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02002219}
2220
2221static void ieee80211_sta_conn_mon_timer(unsigned long data)
2222{
2223 struct ieee80211_sub_if_data *sdata =
2224 (struct ieee80211_sub_if_data *) data;
2225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2226 struct ieee80211_local *local = sdata->local;
2227
2228 if (local->quiescing)
2229 return;
2230
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002231 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02002232}
2233
2234static void ieee80211_sta_monitor_work(struct work_struct *work)
2235{
2236 struct ieee80211_sub_if_data *sdata =
2237 container_of(work, struct ieee80211_sub_if_data,
2238 u.mgd.monitor_work);
2239
2240 ieee80211_mgd_probe_ap(sdata, false);
2241}
2242
Johannes Berga1678f82008-09-11 00:01:47 +02002243static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2244{
Kalle Vaload935682009-04-19 08:47:19 +03002245 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
Johannes Bergb291ba12009-07-10 15:29:03 +02002246 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2247 IEEE80211_STA_CONNECTION_POLL);
Kalle Vaload935682009-04-19 08:47:19 +03002248
Johannes Bergb291ba12009-07-10 15:29:03 +02002249 /* let's probe the connection once */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002250 ieee80211_queue_work(&sdata->local->hw,
Johannes Bergb291ba12009-07-10 15:29:03 +02002251 &sdata->u.mgd.monitor_work);
2252 /* and do all the other regular work too */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002253 ieee80211_queue_work(&sdata->local->hw,
Johannes Berg46900292009-02-15 12:44:28 +01002254 &sdata->u.mgd.work);
Kalle Vaload935682009-04-19 08:47:19 +03002255 }
Johannes Berga1678f82008-09-11 00:01:47 +02002256}
2257
Johannes Berg5bb644a2009-05-17 11:40:42 +02002258#ifdef CONFIG_PM
2259void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2260{
2261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2262
2263 /*
2264 * we need to use atomic bitops for the running bits
2265 * only because both timers might fire at the same
2266 * time -- the code here is properly synchronised.
2267 */
2268
2269 cancel_work_sync(&ifmgd->work);
2270 cancel_work_sync(&ifmgd->beacon_loss_work);
2271 if (del_timer_sync(&ifmgd->timer))
2272 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2273
2274 cancel_work_sync(&ifmgd->chswitch_work);
2275 if (del_timer_sync(&ifmgd->chswitch_timer))
2276 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
Johannes Bergb291ba12009-07-10 15:29:03 +02002277
2278 cancel_work_sync(&ifmgd->monitor_work);
2279 /* these will just be re-established on connection */
2280 del_timer_sync(&ifmgd->conn_mon_timer);
2281 del_timer_sync(&ifmgd->bcn_mon_timer);
Johannes Berg5bb644a2009-05-17 11:40:42 +02002282}
2283
2284void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2285{
2286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2287
2288 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2289 add_timer(&ifmgd->timer);
2290 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2291 add_timer(&ifmgd->chswitch_timer);
2292}
2293#endif
2294
Johannes Berg9c6bd792008-09-11 00:01:52 +02002295/* interface setup */
2296void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
2297{
Johannes Berg46900292009-02-15 12:44:28 +01002298 struct ieee80211_if_managed *ifmgd;
Johannes Berg9c6bd792008-09-11 00:01:52 +02002299
Johannes Berg46900292009-02-15 12:44:28 +01002300 ifmgd = &sdata->u.mgd;
2301 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02002302 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
Johannes Berg46900292009-02-15 12:44:28 +01002303 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
Kalle Valo04de8382009-03-22 21:57:35 +02002304 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
Johannes Berg46900292009-02-15 12:44:28 +01002305 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
Johannes Berg9c6bd792008-09-11 00:01:52 +02002306 (unsigned long) sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02002307 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2308 (unsigned long) sdata);
2309 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2310 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01002311 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
Sujithc481ec92009-01-06 09:28:37 +05302312 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01002313 skb_queue_head_init(&ifmgd->skb_queue);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002314
Johannes Berg77fdaa12009-07-07 03:45:17 +02002315 INIT_LIST_HEAD(&ifmgd->work_list);
2316
Johannes Berg46900292009-02-15 12:44:28 +01002317 ifmgd->capab = WLAN_CAPABILITY_ESS;
Johannes Bergab1faea2009-07-01 21:41:17 +02002318 ifmgd->flags = 0;
Johannes Berg176be722009-03-12 23:49:28 +01002319 if (sdata->local->hw.queues >= 4)
Johannes Berg46900292009-02-15 12:44:28 +01002320 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
Johannes Bergbbbdff92009-04-16 13:27:42 +02002321
Johannes Berg77fdaa12009-07-07 03:45:17 +02002322 mutex_init(&ifmgd->mtx);
Johannes Berg9c6bd792008-09-11 00:01:52 +02002323}
2324
2325/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02002326void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2327{
2328 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
Johannes Berga1678f82008-09-11 00:01:47 +02002329
2330 /* Restart STA timers */
2331 rcu_read_lock();
2332 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2333 ieee80211_restart_sta_timer(sdata);
2334 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02002335}
Johannes Berg10f644a2009-04-16 13:17:25 +02002336
2337int ieee80211_max_network_latency(struct notifier_block *nb,
2338 unsigned long data, void *dummy)
2339{
2340 s32 latency_usec = (s32) data;
2341 struct ieee80211_local *local =
2342 container_of(nb, struct ieee80211_local,
2343 network_latency_notifier);
2344
2345 mutex_lock(&local->iflist_mtx);
2346 ieee80211_recalc_ps(local, latency_usec);
2347 mutex_unlock(&local->iflist_mtx);
2348
2349 return 0;
2350}
Johannes Berg77fdaa12009-07-07 03:45:17 +02002351
2352/* config hooks */
2353int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2354 struct cfg80211_auth_request *req)
2355{
2356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2357 const u8 *ssid;
2358 struct ieee80211_mgd_work *wk;
2359 u16 auth_alg;
2360
2361 switch (req->auth_type) {
2362 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2363 auth_alg = WLAN_AUTH_OPEN;
2364 break;
2365 case NL80211_AUTHTYPE_SHARED_KEY:
2366 auth_alg = WLAN_AUTH_SHARED_KEY;
2367 break;
2368 case NL80211_AUTHTYPE_FT:
2369 auth_alg = WLAN_AUTH_FT;
2370 break;
2371 case NL80211_AUTHTYPE_NETWORK_EAP:
2372 auth_alg = WLAN_AUTH_LEAP;
2373 break;
2374 default:
2375 return -EOPNOTSUPP;
2376 }
2377
2378 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2379 if (!wk)
2380 return -ENOMEM;
2381
2382 wk->bss = (void *)req->bss;
2383
2384 if (req->ie && req->ie_len) {
2385 memcpy(wk->ie, req->ie, req->ie_len);
2386 wk->ie_len = req->ie_len;
2387 }
2388
Johannes Bergfffd0932009-07-08 14:22:54 +02002389 if (req->key && req->key_len) {
2390 wk->key_len = req->key_len;
2391 wk->key_idx = req->key_idx;
2392 memcpy(wk->key, req->key, req->key_len);
2393 }
2394
Johannes Berg77fdaa12009-07-07 03:45:17 +02002395 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2396 memcpy(wk->ssid, ssid + 2, ssid[1]);
2397 wk->ssid_len = ssid[1];
2398
2399 wk->state = IEEE80211_MGD_STATE_PROBE;
2400 wk->auth_alg = auth_alg;
Johannes Berg48531842009-07-23 16:50:16 +02002401 wk->timeout = jiffies; /* run right away */
Johannes Berg77fdaa12009-07-07 03:45:17 +02002402
2403 /*
2404 * XXX: if still associated need to tell AP that we're going
2405 * to sleep and then change channel etc.
2406 */
2407 sdata->local->oper_channel = req->bss->channel;
2408 ieee80211_hw_config(sdata->local, 0);
2409
2410 mutex_lock(&ifmgd->mtx);
2411 list_add(&wk->list, &sdata->u.mgd.work_list);
2412 mutex_unlock(&ifmgd->mtx);
2413
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002414 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002415 return 0;
2416}
2417
2418int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2419 struct cfg80211_assoc_request *req)
2420{
2421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2422 struct ieee80211_mgd_work *wk, *found = NULL;
2423 int i, err;
2424
2425 mutex_lock(&ifmgd->mtx);
2426
2427 list_for_each_entry(wk, &ifmgd->work_list, list) {
2428 if (&wk->bss->cbss == req->bss &&
2429 wk->state == IEEE80211_MGD_STATE_IDLE) {
2430 found = wk;
2431 break;
2432 }
2433 }
2434
2435 if (!found) {
2436 err = -ENOLINK;
2437 goto out;
2438 }
2439
2440 list_del(&found->list);
2441
2442 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2443 if (!wk) {
2444 list_add(&found->list, &ifmgd->work_list);
2445 err = -ENOMEM;
2446 goto out;
2447 }
2448
2449 list_add(&wk->list, &ifmgd->work_list);
2450
2451 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2452
2453 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2454 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2455 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2456 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2457 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2458
2459 sdata->local->oper_channel = req->bss->channel;
2460 ieee80211_hw_config(sdata->local, 0);
2461
2462 if (req->ie && req->ie_len) {
2463 memcpy(wk->ie, req->ie, req->ie_len);
2464 wk->ie_len = req->ie_len;
2465 } else
2466 wk->ie_len = 0;
2467
2468 if (req->prev_bssid)
2469 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2470
2471 wk->state = IEEE80211_MGD_STATE_ASSOC;
2472 wk->tries = 0;
Johannes Berg48531842009-07-23 16:50:16 +02002473 wk->timeout = jiffies; /* run right away */
Johannes Berg77fdaa12009-07-07 03:45:17 +02002474
2475 if (req->use_mfp) {
2476 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2477 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2478 } else {
2479 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2480 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2481 }
2482
2483 if (req->crypto.control_port)
2484 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2485 else
2486 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2487
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002488 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002489
2490 err = 0;
2491
2492 out:
2493 mutex_unlock(&ifmgd->mtx);
2494 return err;
2495}
2496
2497int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503d2009-07-07 03:56:11 +02002498 struct cfg80211_deauth_request *req,
2499 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002500{
2501 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2502 struct ieee80211_mgd_work *wk;
2503 const u8 *bssid = NULL;
2504
2505 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2506 sdata->dev->name, req->reason_code);
2507
2508 mutex_lock(&ifmgd->mtx);
2509
2510 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2511 bssid = req->bss->bssid;
Johannes Berge21546a2009-08-06 20:41:32 +02002512 ieee80211_set_disassoc(sdata, true);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002513 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2514 if (&wk->bss->cbss == req->bss) {
2515 bssid = req->bss->bssid;
2516 list_del(&wk->list);
2517 kfree(wk);
2518 break;
2519 }
2520 }
2521
Johannes Berg8d8b2612009-07-25 11:58:36 +02002522 /*
2523 * cfg80211 should catch this ... but it's racy since
2524 * we can receive a deauth frame, process it, hand it
2525 * to cfg80211 while that's in a locked section already
2526 * trying to tell us that the user wants to disconnect.
2527 */
2528 if (!bssid) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002529 mutex_unlock(&ifmgd->mtx);
2530 return -ENOLINK;
2531 }
2532
2533 mutex_unlock(&ifmgd->mtx);
2534
2535 ieee80211_send_deauth_disassoc(sdata, bssid,
Johannes Berg667503d2009-07-07 03:56:11 +02002536 IEEE80211_STYPE_DEAUTH, req->reason_code,
2537 cookie);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002538
2539 return 0;
2540}
2541
2542int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503d2009-07-07 03:56:11 +02002543 struct cfg80211_disassoc_request *req,
2544 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002545{
2546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2547
2548 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2549 sdata->dev->name, req->reason_code);
2550
2551 mutex_lock(&ifmgd->mtx);
2552
Johannes Berg8d8b2612009-07-25 11:58:36 +02002553 /*
2554 * cfg80211 should catch this ... but it's racy since
2555 * we can receive a disassoc frame, process it, hand it
2556 * to cfg80211 while that's in a locked section already
2557 * trying to tell us that the user wants to disconnect.
2558 */
2559 if (&ifmgd->associated->cbss != req->bss) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002560 mutex_unlock(&ifmgd->mtx);
2561 return -ENOLINK;
2562 }
2563
Johannes Berge21546a2009-08-06 20:41:32 +02002564 ieee80211_set_disassoc(sdata, false);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002565
2566 mutex_unlock(&ifmgd->mtx);
2567
2568 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
Johannes Berg667503d2009-07-07 03:56:11 +02002569 IEEE80211_STYPE_DISASSOC, req->reason_code,
2570 cookie);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002571 return 0;
2572}