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mac80211: cancel/restart all timers across suspend/resume
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82 29
6042a3e3 30#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 31#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32#define IEEE80211_AUTH_MAX_TRIES 3
33#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34#define IEEE80211_ASSOC_MAX_TRIES 3
35#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
e0502de6 36#define IEEE80211_PROBE_WAIT (HZ / 20)
15b7b062 37#define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
f0706e82 38#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
f0706e82 39
5bb644a0
JB		 40#define TMR_RUNNING_TIMER 0
41#define TMR_RUNNING_CHANSW 1
42
5484e237
JB		 43/* utils */
44static int ecw2cw(int ecw)
60f8b39c 45{
5484e237 46 return (1 << ecw) - 1;
60f8b39c
JB		 47}
48
c2b13452 49static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 50{
51 u8 *end, *pos;
52
00d3f14c 53 pos = bss->cbss.information_elements;
43ac2ca3
JM		 54 if (pos == NULL)
55 return NULL;
00d3f14c 56 end = pos + bss->cbss.len_information_elements;
43ac2ca3
JM		 57
58 while (pos + 1 < end) {
59 if (pos + 2 + pos[1] > end)
60 break;
61 if (pos[0] == ie)
62 return pos;
63 pos += 2 + pos[1];
64 }
65
66 return NULL;
67}
68
c2b13452 69static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 70 struct ieee80211_supported_band *sband,
881d948c 71 u32 *rates)
9ac19a90
JB		 72{
73 int i, j, count;
74 *rates = 0;
75 count = 0;
76 for (i = 0; i < bss->supp_rates_len; i++) {
77 int rate = (bss->supp_rates[i] & 0x7F) * 5;
78
79 for (j = 0; j < sband->n_bitrates; j++)
80 if (sband->bitrates[j].bitrate == rate) {
81 *rates |= BIT(j);
82 count++;
83 break;
84 }
85 }
86
87 return count;
88}
89
d5522e03
JB		 90/*
91 * ieee80211_enable_ht should be called only after the operating band
92 * has been determined as ht configuration depends on the hw's
93 * HT abilities for a specific band.
94 */
95static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
96 struct ieee80211_ht_info *hti,
97 u16 ap_ht_cap_flags)
98{
99 struct ieee80211_local *local = sdata->local;
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03
JB		 102 struct sta_info *sta;
103 u32 changed = 0;
9ed6bcce 104 u16 ht_opmode;
d5522e03
JB		 105 bool enable_ht = true, ht_changed;
106 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
107
108 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
109
d5522e03
JB		 110 /* HT is not supported */
111 if (!sband->ht_cap.ht_supported)
112 enable_ht = false;
113
114 /* check that channel matches the right operating channel */
115 if (local->hw.conf.channel->center_freq !=
116 ieee80211_channel_to_frequency(hti->control_chan))
117 enable_ht = false;
118
119 if (enable_ht) {
120 channel_type = NL80211_CHAN_HT20;
121
122 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
123 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
124 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
125 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 127 if (!(local->hw.conf.channel->flags &
128 IEEE80211_CHAN_NO_HT40PLUS))
129 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 130 break;
131 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 132 if (!(local->hw.conf.channel->flags &
133 IEEE80211_CHAN_NO_HT40MINUS))
134 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 135 break;
136 }
137 }
138 }
139
140 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
141 channel_type != local->hw.conf.channel_type;
142
143 local->oper_channel_type = channel_type;
144
145 if (ht_changed) {
146 /* channel_type change automatically detected */
147 ieee80211_hw_config(local, 0);
148
149 rcu_read_lock();
150
151 sta = sta_info_get(local, ifmgd->bssid);
152 if (sta)
153 rate_control_rate_update(local, sband, sta,
154 IEEE80211_RC_HT_CHANGED);
155
156 rcu_read_unlock();
d5522e03
JB		 157 }
158
159 /* disable HT */
160 if (!enable_ht)
161 return 0;
162
9ed6bcce 163 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 164
165 /* if bss configuration changed store the new one */
413ad50a
JB		 166 if (!sdata->ht_opmode_valid ||
167 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 168 changed |= BSS_CHANGED_HT;
9ed6bcce 169 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 170 sdata->ht_opmode_valid = true;
d5522e03
JB		 171 }
172
173 return changed;
174}
175
9c6bd790
JB		 176/* frame sending functions */
177
46900298 178static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
9ac19a90 179{
46900298 180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 181 struct ieee80211_local *local = sdata->local;
182 struct sk_buff *skb;
183 struct ieee80211_mgmt *mgmt;
65fc73ac 184 u8 *pos, *ies, *ht_ie;
9ac19a90
JB		 185 int i, len, count, rates_len, supp_rates_len;
186 u16 capab;
c2b13452 187 struct ieee80211_bss *bss;
9ac19a90
JB		 188 int wmm = 0;
189 struct ieee80211_supported_band *sband;
881d948c 190 u32 rates = 0;
9ac19a90
JB		 191
192 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
46900298 193 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
65fc73ac 194 ifmgd->ssid_len);
9ac19a90
JB		 195 if (!skb) {
196 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
197 "frame\n", sdata->dev->name);
198 return;
199 }
200 skb_reserve(skb, local->hw.extra_tx_headroom);
201
202 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
203
46900298 204 capab = ifmgd->capab;
9ac19a90
JB		 205
206 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
207 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
208 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
209 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
210 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
211 }
212
46900298 213 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
9ac19a90 214 local->hw.conf.channel->center_freq,
46900298 215 ifmgd->ssid, ifmgd->ssid_len);
9ac19a90 216 if (bss) {
00d3f14c 217 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
9ac19a90
JB		 218 capab |= WLAN_CAPABILITY_PRIVACY;
219 if (bss->wmm_used)
220 wmm = 1;
221
222 /* get all rates supported by the device and the AP as
223 * some APs don't like getting a superset of their rates
224 * in the association request (e.g. D-Link DAP 1353 in
225 * b-only mode) */
226 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
227
00d3f14c 228 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
9ac19a90
JB		 229 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
230 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
231
232 ieee80211_rx_bss_put(local, bss);
233 } else {
234 rates = ~0;
235 rates_len = sband->n_bitrates;
236 }
237
238 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
239 memset(mgmt, 0, 24);
46900298 240 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
9ac19a90 241 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 242 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
9ac19a90 243
46900298 244 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
9ac19a90
JB		 245 skb_put(skb, 10);
246 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
247 IEEE80211_STYPE_REASSOC_REQ);
248 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
249 mgmt->u.reassoc_req.listen_interval =
250 cpu_to_le16(local->hw.conf.listen_interval);
46900298 251 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
9ac19a90
JB		 252 ETH_ALEN);
253 } else {
254 skb_put(skb, 4);
255 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
256 IEEE80211_STYPE_ASSOC_REQ);
257 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 258 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 259 cpu_to_le16(local->hw.conf.listen_interval);
260 }
261
262 /* SSID */
46900298 263 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
9ac19a90 264 *pos++ = WLAN_EID_SSID;
46900298
JB		 265 *pos++ = ifmgd->ssid_len;
266 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
9ac19a90
JB		 267
268 /* add all rates which were marked to be used above */
269 supp_rates_len = rates_len;
270 if (supp_rates_len > 8)
271 supp_rates_len = 8;
272
273 len = sband->n_bitrates;
274 pos = skb_put(skb, supp_rates_len + 2);
275 *pos++ = WLAN_EID_SUPP_RATES;
276 *pos++ = supp_rates_len;
277
278 count = 0;
279 for (i = 0; i < sband->n_bitrates; i++) {
280 if (BIT(i) & rates) {
281 int rate = sband->bitrates[i].bitrate;
282 *pos++ = (u8) (rate / 5);
283 if (++count == 8)
284 break;
285 }
286 }
287
288 if (rates_len > count) {
289 pos = skb_put(skb, rates_len - count + 2);
290 *pos++ = WLAN_EID_EXT_SUPP_RATES;
291 *pos++ = rates_len - count;
292
293 for (i++; i < sband->n_bitrates; i++) {
294 if (BIT(i) & rates) {
295 int rate = sband->bitrates[i].bitrate;
296 *pos++ = (u8) (rate / 5);
297 }
298 }
299 }
300
301 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
302 /* 1. power capabilities */
303 pos = skb_put(skb, 4);
304 *pos++ = WLAN_EID_PWR_CAPABILITY;
305 *pos++ = 2;
306 *pos++ = 0; /* min tx power */
307 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
308
309 /* 2. supported channels */
310 /* TODO: get this in reg domain format */
311 pos = skb_put(skb, 2 * sband->n_channels + 2);
312 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
313 *pos++ = 2 * sband->n_channels;
314 for (i = 0; i < sband->n_channels; i++) {
315 *pos++ = ieee80211_frequency_to_channel(
316 sband->channels[i].center_freq);
317 *pos++ = 1; /* one channel in the subband*/
318 }
319 }
320
46900298
JB		 321 if (ifmgd->extra_ie) {
322 pos = skb_put(skb, ifmgd->extra_ie_len);
323 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
9ac19a90
JB		 324 }
325
46900298 326 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 327 pos = skb_put(skb, 9);
328 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
329 *pos++ = 7; /* len */
330 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
331 *pos++ = 0x50;
332 *pos++ = 0xf2;
333 *pos++ = 2; /* WME */
334 *pos++ = 0; /* WME info */
335 *pos++ = 1; /* WME ver */
336 *pos++ = 0;
337 }
338
339 /* wmm support is a must to HT */
eb46936b
VT		 340 /*
341 * IEEE802.11n does not allow TKIP/WEP as pairwise
342 * ciphers in HT mode. We still associate in non-ht
343 * mode (11a/b/g) if any one of these ciphers is
344 * configured as pairwise.
345 */
46900298 346 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB		 347 sband->ht_cap.ht_supported &&
348 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 349 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
46900298 350 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
d9fe60de
JB		 351 struct ieee80211_ht_info *ht_info =
352 (struct ieee80211_ht_info *)(ht_ie + 2);
353 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 354 __le16 tmp;
355 u32 flags = local->hw.conf.channel->flags;
356
d9fe60de
JB		 357 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
358 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 359 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 360 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 361 cap &= ~IEEE80211_HT_CAP_SGI_40;
362 }
363 break;
d9fe60de 364 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 365 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 366 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 367 cap &= ~IEEE80211_HT_CAP_SGI_40;
368 }
369 break;
370 }
371
372 tmp = cpu_to_le16(cap);
373 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
374 *pos++ = WLAN_EID_HT_CAPABILITY;
375 *pos++ = sizeof(struct ieee80211_ht_cap);
376 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
377 memcpy(pos, &tmp, sizeof(u16));
378 pos += sizeof(u16);
379 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 380 *pos++ = sband->ht_cap.ampdu_factor |
381 (sband->ht_cap.ampdu_density << 2);
382 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 383 }
384
46900298
JB		 385 kfree(ifmgd->assocreq_ies);
386 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
387 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
388 if (ifmgd->assocreq_ies)
389 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
9ac19a90 390
e50db65c 391 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 392}
393
394
ef422bc0
JB		 395static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
396 u16 stype, u16 reason)
9ac19a90
JB		 397{
398 struct ieee80211_local *local = sdata->local;
46900298 399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 400 struct sk_buff *skb;
401 struct ieee80211_mgmt *mgmt;
9aed3cc1 402
65fc73ac 403 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 404 if (!skb) {
ef422bc0
JB		 405 printk(KERN_DEBUG "%s: failed to allocate buffer for "
406 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 407 return;
408 }
409 skb_reserve(skb, local->hw.extra_tx_headroom);
410
411 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
412 memset(mgmt, 0, 24);
46900298 413 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
9ac19a90 414 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 415 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
ef422bc0 416 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 417 skb_put(skb, 2);
ef422bc0 418 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 419 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
420
53b46b84
JM		 421 if (stype == IEEE80211_STYPE_DEAUTH)
422 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
423 else
424 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 425 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 426}
427
572e0012
KV		 428void ieee80211_send_pspoll(struct ieee80211_local *local,
429 struct ieee80211_sub_if_data *sdata)
430{
46900298 431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 432 struct ieee80211_pspoll *pspoll;
433 struct sk_buff *skb;
434 u16 fc;
435
436 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
437 if (!skb) {
438 printk(KERN_DEBUG "%s: failed to allocate buffer for "
439 "pspoll frame\n", sdata->dev->name);
440 return;
441 }
442 skb_reserve(skb, local->hw.extra_tx_headroom);
443
444 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
445 memset(pspoll, 0, sizeof(*pspoll));
446 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
447 pspoll->frame_control = cpu_to_le16(fc);
46900298 448 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 449
450 /* aid in PS-Poll has its two MSBs each set to 1 */
451 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
452
46900298 453 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 454 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
455
456 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 457}
458
965bedad
JB		 459void ieee80211_send_nullfunc(struct ieee80211_local *local,
460 struct ieee80211_sub_if_data *sdata,
461 int powersave)
462{
463 struct sk_buff *skb;
464 struct ieee80211_hdr *nullfunc;
465 __le16 fc;
466
467 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
468 return;
469
470 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
471 if (!skb) {
472 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
473 "frame\n", sdata->dev->name);
474 return;
475 }
476 skb_reserve(skb, local->hw.extra_tx_headroom);
477
478 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
479 memset(nullfunc, 0, 24);
480 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
481 IEEE80211_FCTL_TODS);
482 if (powersave)
483 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
484 nullfunc->frame_control = fc;
485 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
486 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
487 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
488
489 ieee80211_tx_skb(sdata, skb, 0);
490}
491
cc32abd4
JB		 492/* spectrum management related things */
493static void ieee80211_chswitch_work(struct work_struct *work)
494{
495 struct ieee80211_sub_if_data *sdata =
496 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
497 struct ieee80211_bss *bss;
498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
499
500 if (!netif_running(sdata->dev))
501 return;
502
503 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
504 sdata->local->hw.conf.channel->center_freq,
505 ifmgd->ssid, ifmgd->ssid_len);
506 if (!bss)
507 goto exit;
508
509 sdata->local->oper_channel = sdata->local->csa_channel;
510 /* XXX: shouldn't really modify cfg80211-owned data! */
511 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
512 bss->cbss.channel = sdata->local->oper_channel;
513
514 ieee80211_rx_bss_put(sdata->local, bss);
515exit:
516 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
517 ieee80211_wake_queues_by_reason(&sdata->local->hw,
518 IEEE80211_QUEUE_STOP_REASON_CSA);
519}
520
521static void ieee80211_chswitch_timer(unsigned long data)
522{
523 struct ieee80211_sub_if_data *sdata =
524 (struct ieee80211_sub_if_data *) data;
525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
526
5bb644a0
JB		 527 if (sdata->local->quiescing) {
528 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
529 return;
530 }
531
cc32abd4
JB		 532 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
533}
534
535void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
536 struct ieee80211_channel_sw_ie *sw_elem,
537 struct ieee80211_bss *bss)
538{
539 struct ieee80211_channel *new_ch;
540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
541 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
542
543 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
544 return;
545
546 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
547 return;
548
549 /* Disregard subsequent beacons if we are already running a timer
550 processing a CSA */
551
552 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
553 return;
554
555 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
556 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
557 return;
558
559 sdata->local->csa_channel = new_ch;
560
561 if (sw_elem->count <= 1) {
562 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
563 } else {
564 ieee80211_stop_queues_by_reason(&sdata->local->hw,
565 IEEE80211_QUEUE_STOP_REASON_CSA);
566 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
567 mod_timer(&ifmgd->chswitch_timer,
568 jiffies +
569 msecs_to_jiffies(sw_elem->count *
570 bss->cbss.beacon_interval));
571 }
572}
573
574static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
575 u16 capab_info, u8 *pwr_constr_elem,
576 u8 pwr_constr_elem_len)
577{
578 struct ieee80211_conf *conf = &sdata->local->hw.conf;
579
580 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
581 return;
582
583 /* Power constraint IE length should be 1 octet */
584 if (pwr_constr_elem_len != 1)
585 return;
586
587 if ((*pwr_constr_elem <= conf->channel->max_power) &&
588 (*pwr_constr_elem != sdata->local->power_constr_level)) {
589 sdata->local->power_constr_level = *pwr_constr_elem;
590 ieee80211_hw_config(sdata->local, 0);
591 }
592}
593
965bedad
JB		 594/* powersave */
595static void ieee80211_enable_ps(struct ieee80211_local *local,
596 struct ieee80211_sub_if_data *sdata)
597{
598 struct ieee80211_conf *conf = &local->hw.conf;
599
d5edaedc
JB		 600 /*
601 * If we are scanning right now then the parameters will
602 * take effect when scan finishes.
603 */
604 if (local->hw_scanning || local->sw_scanning)
605 return;
606
965bedad
JB		 607 if (conf->dynamic_ps_timeout > 0 &&
608 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
609 mod_timer(&local->dynamic_ps_timer, jiffies +
610 msecs_to_jiffies(conf->dynamic_ps_timeout));
611 } else {
612 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
613 ieee80211_send_nullfunc(local, sdata, 1);
614 conf->flags |= IEEE80211_CONF_PS;
615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
616 }
617}
618
619static void ieee80211_change_ps(struct ieee80211_local *local)
620{
621 struct ieee80211_conf *conf = &local->hw.conf;
622
623 if (local->ps_sdata) {
624 if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED))
625 return;
626
627 ieee80211_enable_ps(local, local->ps_sdata);
628 } else if (conf->flags & IEEE80211_CONF_PS) {
629 conf->flags &= ~IEEE80211_CONF_PS;
630 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
631 del_timer_sync(&local->dynamic_ps_timer);
632 cancel_work_sync(&local->dynamic_ps_enable_work);
633 }
634}
635
636/* need to hold RTNL or interface lock */
10f644a4 637void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 638{
639 struct ieee80211_sub_if_data *sdata, *found = NULL;
640 int count = 0;
641
642 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
643 local->ps_sdata = NULL;
644 return;
645 }
646
647 list_for_each_entry(sdata, &local->interfaces, list) {
648 if (!netif_running(sdata->dev))
649 continue;
650 if (sdata->vif.type != NL80211_IFTYPE_STATION)
651 continue;
652 found = sdata;
653 count++;
654 }
655
10f644a4
JB		 656 if (count == 1 && found->u.mgd.powersave) {
657 s32 beaconint_us;
658
659 if (latency < 0)
660 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
661
662 beaconint_us = ieee80211_tu_to_usec(
663 found->vif.bss_conf.beacon_int);
664
04fe2037 665 if (beaconint_us > latency) {
10f644a4 666 local->ps_sdata = NULL;
04fe2037
JB		 667 } else {
668 u8 dtimper = found->vif.bss_conf.dtim_period;
669 int maxslp = 1;
670
671 if (dtimper > 1)
672 maxslp = min_t(int, dtimper,
673 latency / beaconint_us);
674
9ccebe61 675 local->hw.conf.max_sleep_period = maxslp;
10f644a4 676 local->ps_sdata = found;
04fe2037 677 }
10f644a4 678 } else {
965bedad 679 local->ps_sdata = NULL;
10f644a4 680 }
965bedad
JB		 681
682 ieee80211_change_ps(local);
683}
684
685void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
686{
687 struct ieee80211_local *local =
688 container_of(work, struct ieee80211_local,
689 dynamic_ps_disable_work);
690
691 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
692 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
693 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
694 }
695
696 ieee80211_wake_queues_by_reason(&local->hw,
697 IEEE80211_QUEUE_STOP_REASON_PS);
698}
699
700void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
701{
702 struct ieee80211_local *local =
703 container_of(work, struct ieee80211_local,
704 dynamic_ps_enable_work);
705 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
706
707 /* can only happen when PS was just disabled anyway */
708 if (!sdata)
709 return;
710
711 if (local->hw.conf.flags & IEEE80211_CONF_PS)
712 return;
713
714 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
715 ieee80211_send_nullfunc(local, sdata, 1);
716
717 local->hw.conf.flags |= IEEE80211_CONF_PS;
718 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
719}
720
721void ieee80211_dynamic_ps_timer(unsigned long data)
722{
723 struct ieee80211_local *local = (void *) data;
724
5bb644a0
JB		 725 if (local->quiescing)
726 return;
727
965bedad
JB		 728 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
729}
730
60f8b39c 731/* MLME */
f698d856 732static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 733 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 734 u8 *wmm_param, size_t wmm_param_len)
735{
f0706e82
JB		 736 struct ieee80211_tx_queue_params params;
737 size_t left;
738 int count;
739 u8 *pos;
740
46900298 741 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 742 return;
743
744 if (!wmm_param)
745 return;
746
f0706e82
JB		 747 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
748 return;
749 count = wmm_param[6] & 0x0f;
46900298 750 if (count == ifmgd->wmm_last_param_set)
f0706e82 751 return;
46900298 752 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 753
754 pos = wmm_param + 8;
755 left = wmm_param_len - 8;
756
757 memset(&params, 0, sizeof(params));
758
f0706e82
JB		 759 local->wmm_acm = 0;
760 for (; left >= 4; left -= 4, pos += 4) {
761 int aci = (pos[0] >> 5) & 0x03;
762 int acm = (pos[0] >> 4) & 0x01;
763 int queue;
764
765 switch (aci) {
0eeb59fe 766 case 1: /* AC_BK */
e100bb64 767 queue = 3;
988c0f72 768 if (acm)
0eeb59fe 769 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 770 break;
0eeb59fe 771 case 2: /* AC_VI */
e100bb64 772 queue = 1;
988c0f72 773 if (acm)
0eeb59fe 774 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 775 break;
0eeb59fe 776 case 3: /* AC_VO */
e100bb64 777 queue = 0;
988c0f72 778 if (acm)
0eeb59fe 779 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 780 break;
0eeb59fe 781 case 0: /* AC_BE */
f0706e82 782 default:
e100bb64 783 queue = 2;
988c0f72 784 if (acm)
0eeb59fe 785 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 786 break;
787 }
788
789 params.aifs = pos[0] & 0x0f;
790 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
791 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 792 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 793#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 794 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 795 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 796 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 797 params.cw_max, params.txop);
798#endif
24487981 799 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 800 printk(KERN_DEBUG "%s: failed to set TX queue "
24487981
JB		 801 "parameters for queue %d\n", local->mdev->name,
802 queue);
f0706e82
JB		 803 }
804}
805
7a5158ef
JB		 806static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
807 u16 capab, bool erp_valid, u8 erp)
5628221c 808{
bda3933a 809 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 810#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
46900298 811 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
ebd74487 812#endif
471b3efd 813 u32 changed = 0;
7a5158ef
JB		 814 bool use_protection;
815 bool use_short_preamble;
816 bool use_short_slot;
817
818 if (erp_valid) {
819 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
820 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
821 } else {
822 use_protection = false;
823 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
824 }
825
826 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 827
471b3efd 828 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 829#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 830 if (net_ratelimit()) {
0c68ae26 831 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 832 sdata->dev->name,
5628221c 833 use_protection ? "enabled" : "disabled",
46900298 834 ifmgd->bssid);
5628221c 835 }
f4ea83dd 836#endif
471b3efd
JB		 837 bss_conf->use_cts_prot = use_protection;
838 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 839 }
7e9ed188 840
d43c7b37 841 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 842#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 843 if (net_ratelimit()) {
844 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 845 " (BSSID=%pM)\n",
471b3efd 846 sdata->dev->name,
d43c7b37 847 use_short_preamble ? "short" : "long",
46900298 848 ifmgd->bssid);
7e9ed188 849 }
f4ea83dd 850#endif
d43c7b37 851 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 852 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 853 }
d9430a32 854
7a5158ef
JB		 855 if (use_short_slot != bss_conf->use_short_slot) {
856#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
857 if (net_ratelimit()) {
391429c1
CL		 858 printk(KERN_DEBUG "%s: switched to %s slot time"
859 " (BSSID=%pM)\n",
7a5158ef
JB		 860 sdata->dev->name,
861 use_short_slot ? "short" : "long",
46900298 862 ifmgd->bssid);
7a5158ef
JB		 863 }
864#endif
865 bss_conf->use_short_slot = use_short_slot;
866 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 867 }
868
869 return changed;
870}
871
46900298 872static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
f5e5bf25
TW		 873{
874 union iwreq_data wrqu;
46900298 875
f5e5bf25 876 memset(&wrqu, 0, sizeof(wrqu));
46900298
JB		 877 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
878 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
f5e5bf25
TW		 879 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
880 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
881}
882
46900298 883static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
f0706e82 884{
46900298 885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
74af0250
LT		 886 char *buf;
887 size_t len;
888 int i;
f0706e82
JB		 889 union iwreq_data wrqu;
890
46900298 891 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
74af0250
LT		 892 return;
893
46900298
JB		 894 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
895 ifmgd->assocresp_ies_len), GFP_KERNEL);
74af0250
LT		 896 if (!buf)
897 return;
898
899 len = sprintf(buf, "ASSOCINFO(");
46900298 900 if (ifmgd->assocreq_ies) {
74af0250 901 len += sprintf(buf + len, "ReqIEs=");
46900298 902 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
74af0250 903 len += sprintf(buf + len, "%02x",
46900298 904 ifmgd->assocreq_ies[i]);
74af0250 905 }
f0706e82 906 }
46900298
JB		 907 if (ifmgd->assocresp_ies) {
908 if (ifmgd->assocreq_ies)
74af0250
LT		 909 len += sprintf(buf + len, " ");
910 len += sprintf(buf + len, "RespIEs=");
46900298 911 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 912 len += sprintf(buf + len, "%02x",
46900298 913 ifmgd->assocresp_ies[i]);
74af0250 914 }
f0706e82 915 }
74af0250
LT		 916 len += sprintf(buf + len, ")");
917
918 if (len > IW_CUSTOM_MAX) {
919 len = sprintf(buf, "ASSOCRESPIE=");
46900298 920 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 921 len += sprintf(buf + len, "%02x",
46900298 922 ifmgd->assocresp_ies[i]);
74af0250
LT		 923 }
924 }
925
ad788b5e
JL		 926 if (len <= IW_CUSTOM_MAX) {
927 memset(&wrqu, 0, sizeof(wrqu));
928 wrqu.data.length = len;
929 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
930 }
74af0250
LT		 931
932 kfree(buf);
f0706e82
JB		 933}
934
935
f698d856 936static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026 937 u32 bss_info_changed)
f0706e82 938{
46900298 939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 940 struct ieee80211_local *local = sdata->local;
38668c05 941 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 942
c2b13452 943 struct ieee80211_bss *bss;
d6f2da5b 944
ae5eb026 945 bss_info_changed |= BSS_CHANGED_ASSOC;
46900298 946 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 947
46900298 948 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
f5e5bf25 949 conf->channel->center_freq,
46900298 950 ifmgd->ssid, ifmgd->ssid_len);
f5e5bf25
TW		 951 if (bss) {
952 /* set timing information */
00d3f14c
JB		 953 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
954 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
bda3933a 955 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 956
57c4d7b4 957 bss_info_changed |= BSS_CHANGED_BEACON_INT;
ae5eb026 958 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
00d3f14c 959 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
9ac19a90 960
04de8381
KV		 961 cfg80211_hold_bss(&bss->cbss);
962
9ac19a90 963 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 964 }
965
46900298
JB		 966 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
967 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
968 ieee80211_sta_send_associnfo(sdata);
9306102e 969
46900298 970 ifmgd->last_probe = jiffies;
9ac19a90 971 ieee80211_led_assoc(local, 1);
9306102e 972
bda3933a 973 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 974 /*
975 * For now just always ask the driver to update the basic rateset
976 * when we have associated, we aren't checking whether it actually
977 * changed or not.
978 */
ae5eb026
JB		 979 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
980 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 981
965bedad 982 /* will be same as sdata */
04fe2037
JB		 983 if (local->ps_sdata) {
984 mutex_lock(&local->iflist_mtx);
985 ieee80211_recalc_ps(local, -1);
986 mutex_unlock(&local->iflist_mtx);
987 }
e0cb686f 988
9ac19a90
JB		 989 netif_tx_start_all_queues(sdata->dev);
990 netif_carrier_on(sdata->dev);
f0706e82 991
46900298 992 ieee80211_sta_send_apinfo(sdata);
f0706e82
JB		 993}
994
46900298 995static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
f0706e82 996{
46900298 997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 998 struct ieee80211_local *local = sdata->local;
46900298
JB		 999
1000 ifmgd->direct_probe_tries++;
1001 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1002 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
46900298
JB		 1003 sdata->dev->name, ifmgd->bssid);
1004 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1005 ieee80211_recalc_idle(local);
e61f2340 1006 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
7a947080
VT		 1007
1008 /*
1009 * Most likely AP is not in the range so remove the
1010 * bss information associated to the AP
1011 */
46900298 1012 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1013 sdata->local->hw.conf.channel->center_freq,
46900298 1014 ifmgd->ssid, ifmgd->ssid_len);
11432379
HS		 1015
1016 /*
1017 * We might have a pending scan which had no chance to run yet
1018 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1019 * Hence, queue the STAs work again
1020 */
1021 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1022 return;
1023 }
f0706e82 1024
0c68ae26 1025 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
46900298
JB		 1026 sdata->dev->name, ifmgd->bssid,
1027 ifmgd->direct_probe_tries);
f0706e82 1028
46900298 1029 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 1030
9ac19a90
JB		 1031 /* Direct probe is sent to broadcast address as some APs
1032 * will not answer to direct packet in unassociated state.
1033 */
1034 ieee80211_send_probe_req(sdata, NULL,
70692ad2 1035 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
9ac19a90 1036
46900298 1037 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 1038}
f0706e82 1039
9ac19a90 1040
46900298 1041static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
f0706e82 1042{
46900298 1043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1044 struct ieee80211_local *local = sdata->local;
636a5d36
JM		 1045 u8 *ies;
1046 size_t ies_len;
46900298
JB		 1047
1048 ifmgd->auth_tries++;
1049 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1050 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 1051 " timed out\n",
46900298
JB		 1052 sdata->dev->name, ifmgd->bssid);
1053 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1054 ieee80211_recalc_idle(local);
1965c853 1055 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
46900298 1056 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1057 sdata->local->hw.conf.channel->center_freq,
46900298 1058 ifmgd->ssid, ifmgd->ssid_len);
11432379
HS		 1059
1060 /*
1061 * We might have a pending scan which had no chance to run yet
1062 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1063 * Hence, queue the STAs work again
1064 */
1065 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1066 return;
1067 }
f0706e82 1068
46900298 1069 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26 1070 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
46900298 1071 sdata->dev->name, ifmgd->bssid);
f0706e82 1072
636a5d36
JM		 1073 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1074 ies = ifmgd->sme_auth_ie;
1075 ies_len = ifmgd->sme_auth_ie_len;
1076 } else {
1077 ies = NULL;
1078 ies_len = 0;
1079 }
1080 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
46900298
JB		 1081 ifmgd->bssid, 0);
1082 ifmgd->auth_transaction = 2;
9ac19a90 1083
46900298 1084 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 1085}
1086
5925d976
VN		 1087/*
1088 * The disassoc 'reason' argument can be either our own reason
1089 * if self disconnected or a reason code from the AP.
1090 */
aa458d17 1091static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
46900298
JB		 1092 bool deauth, bool self_disconnected,
1093 u16 reason)
aa458d17 1094{
46900298 1095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1096 struct ieee80211_local *local = sdata->local;
04de8381
KV		 1097 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1098 struct ieee80211_bss *bss;
aa458d17 1099 struct sta_info *sta;
e0cb686f 1100 u32 changed = 0, config_changed = 0;
aa458d17
TW		 1101
1102 rcu_read_lock();
1103
46900298 1104 sta = sta_info_get(local, ifmgd->bssid);
aa458d17
TW		 1105 if (!sta) {
1106 rcu_read_unlock();
1107 return;
1108 }
1109
1110 if (deauth) {
46900298
JB		 1111 ifmgd->direct_probe_tries = 0;
1112 ifmgd->auth_tries = 0;
aa458d17 1113 }
46900298
JB		 1114 ifmgd->assoc_scan_tries = 0;
1115 ifmgd->assoc_tries = 0;
aa458d17 1116
24e64622 1117 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1118 netif_carrier_off(sdata->dev);
1119
2dace10e 1120 ieee80211_sta_tear_down_BA_sessions(sta);
aa458d17 1121
04de8381
KV		 1122 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1123 conf->channel->center_freq,
1124 ifmgd->ssid, ifmgd->ssid_len);
1125
1126 if (bss) {
1127 cfg80211_unhold_bss(&bss->cbss);
1128 ieee80211_rx_bss_put(local, bss);
1129 }
1130
aa458d17
TW		 1131 if (self_disconnected) {
1132 if (deauth)
ef422bc0
JB		 1133 ieee80211_send_deauth_disassoc(sdata,
1134 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 1135 else
ef422bc0
JB		 1136 ieee80211_send_deauth_disassoc(sdata,
1137 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 1138 }
1139
46900298 1140 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
f5e5bf25
TW		 1141 changed |= ieee80211_reset_erp_info(sdata);
1142
f5e5bf25 1143 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1144 changed |= BSS_CHANGED_ASSOC;
1145 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1146
46900298 1147 ieee80211_sta_send_apinfo(sdata);
aa458d17 1148
7a947080 1149 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
46900298
JB		 1150 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1151 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1152 sdata->local->hw.conf.channel->center_freq,
46900298 1153 ifmgd->ssid, ifmgd->ssid_len);
7a947080 1154 }
aa458d17 1155
aa458d17
TW		 1156 rcu_read_unlock();
1157
aa837e1d
JB		 1158 ieee80211_set_wmm_default(sdata);
1159
5cff20e6
JB		 1160 ieee80211_recalc_idle(local);
1161
4797938c 1162 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1163 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1164
413ad50a
JB		 1165 /* on the next assoc, re-program HT parameters */
1166 sdata->ht_opmode_valid = false;
1167
a8302de9
VT		 1168 local->power_constr_level = 0;
1169
520eb820
KV		 1170 del_timer_sync(&local->dynamic_ps_timer);
1171 cancel_work_sync(&local->dynamic_ps_enable_work);
1172
e0cb686f
KV		 1173 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1174 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1175 config_changed |= IEEE80211_CONF_CHANGE_PS;
1176 }
ae5eb026 1177
e0cb686f 1178 ieee80211_hw_config(local, config_changed);
ae5eb026 1179 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1180
1181 rcu_read_lock();
1182
46900298 1183 sta = sta_info_get(local, ifmgd->bssid);
8e268e47
TW		 1184 if (!sta) {
1185 rcu_read_unlock();
1186 return;
1187 }
1188
1189 sta_info_unlink(&sta);
1190
1191 rcu_read_unlock();
1192
1193 sta_info_destroy(sta);
aa458d17 1194}
f0706e82 1195
9ac19a90
JB		 1196static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1197{
1198 if (!sdata || !sdata->default_key ||
1199 sdata->default_key->conf.alg != ALG_WEP)
1200 return 0;
1201 return 1;
1202}
1203
46900298 1204static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
f0706e82 1205{
46900298 1206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1207 struct ieee80211_local *local = sdata->local;
c2b13452 1208 struct ieee80211_bss *bss;
5b98b1f7
JB		 1209 int bss_privacy;
1210 int wep_privacy;
1211 int privacy_invoked;
f0706e82 1212
7986cf95 1213 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
f0706e82
JB		 1214 return 0;
1215
46900298 1216 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
8318d78a 1217 local->hw.conf.channel->center_freq,
46900298 1218 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 1219 if (!bss)
1220 return 0;
1221
00d3f14c 1222 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1223 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
46900298 1224 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1225
3e122be0 1226 ieee80211_rx_bss_put(local, bss);
f0706e82 1227
5b98b1f7
JB		 1228 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1229 return 0;
1230
1231 return 1;
f0706e82
JB		 1232}
1233
46900298 1234static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
f0706e82 1235{
46900298 1236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1237 struct ieee80211_local *local = sdata->local;
46900298
JB		 1238
1239 ifmgd->assoc_tries++;
1240 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1241 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1242 " timed out\n",
46900298
JB		 1243 sdata->dev->name, ifmgd->bssid);
1244 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1245 ieee80211_recalc_idle(local);
1965c853 1246 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
46900298 1247 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1248 sdata->local->hw.conf.channel->center_freq,
46900298 1249 ifmgd->ssid, ifmgd->ssid_len);
11432379
HS		 1250 /*
1251 * We might have a pending scan which had no chance to run yet
1252 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1253 * Hence, queue the STAs work again
1254 */
1255 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1256 return;
1257 }
1258
46900298 1259 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26 1260 printk(KERN_DEBUG "%s: associate with AP %pM\n",
46900298
JB		 1261 sdata->dev->name, ifmgd->bssid);
1262 if (ieee80211_privacy_mismatch(sdata)) {
f0706e82 1263 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1264 "mixed-cell disabled - abort association\n", sdata->dev->name);
46900298 1265 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1266 ieee80211_recalc_idle(local);
f0706e82
JB		 1267 return;
1268 }
1269
46900298 1270 ieee80211_send_assoc(sdata);
f0706e82 1271
46900298 1272 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
f0706e82
JB		 1273}
1274
3cf335d5
KV		 1275void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1276 struct ieee80211_hdr *hdr)
1277{
1278 /*
1279 * We can postpone the mgd.timer whenever receiving unicast frames
1280 * from AP because we know that the connection is working both ways
1281 * at that time. But multicast frames (and hence also beacons) must
1282 * be ignored here, because we need to trigger the timer during
1283 * data idle periods for sending the periodical probe request to
1284 * the AP.
1285 */
1286 if (!is_multicast_ether_addr(hdr->addr1))
1287 mod_timer(&sdata->u.mgd.timer,
1288 jiffies + IEEE80211_MONITORING_INTERVAL);
1289}
f0706e82 1290
04de8381
KV		 1291void ieee80211_beacon_loss_work(struct work_struct *work)
1292{
1293 struct ieee80211_sub_if_data *sdata =
1294 container_of(work, struct ieee80211_sub_if_data,
1295 u.mgd.beacon_loss_work);
1296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1297
34bfc411
JB		 1298 /*
1299 * The driver has already reported this event and we have
1300 * already sent a probe request. Maybe the AP died and the
1301 * driver keeps reporting until we disassociate... We have
1302 * to ignore that because otherwise we would continually
1303 * reset the timer and never check whether we received a
1304 * probe response!
1305 */
1306 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1307 return;
1308
a860402d
MB		 1309#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1310 if (net_ratelimit()) {
1311 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1312 "- sending probe request\n", sdata->dev->name,
1313 sdata->u.mgd.bssid);
1314 }
1315#endif
04de8381
KV		 1316
1317 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1318 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1319 ifmgd->ssid_len, NULL, 0);
1320
e0502de6 1321 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
04de8381
KV		 1322}
1323
1324void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1325{
1326 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1327
1328 queue_work(sdata->local->hw.workqueue,
1329 &sdata->u.mgd.beacon_loss_work);
1330}
1331EXPORT_SYMBOL(ieee80211_beacon_loss);
1332
46900298 1333static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
f0706e82 1334{
46900298 1335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1336 struct ieee80211_local *local = sdata->local;
f0706e82 1337 struct sta_info *sta;
15b7b062 1338 bool disassoc = false;
f0706e82
JB		 1339
1340 /* TODO: start monitoring current AP signal quality and number of
1341 * missed beacons. Scan other channels every now and then and search
1342 * for better APs. */
1343 /* TODO: remove expired BSSes */
1344
46900298 1345 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1346
d0709a65
JB		 1347 rcu_read_lock();
1348
46900298 1349 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 1350 if (!sta) {
0c68ae26 1351 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
46900298 1352 sdata->dev->name, ifmgd->bssid);
15b7b062
KV		 1353 disassoc = true;
1354 goto unlock;
1355 }
1356
1357 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
e0502de6 1358 time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
15b7b062
KV		 1359 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1360 "- disassociating\n",
1361 sdata->dev->name, ifmgd->bssid);
1362 disassoc = true;
1363 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1364 goto unlock;
1365 }
1366
04de8381
KV		 1367 /*
1368 * Beacon filtering is only enabled with power save and then the
1369 * stack should not check for beacon loss.
1370 */
1371 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1372 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1373 time_after(jiffies,
15b7b062 1374 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
a860402d
MB		 1375#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1376 if (net_ratelimit()) {
1377 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1378 "- sending probe request\n",
1379 sdata->dev->name, ifmgd->bssid);
1380 }
1381#endif
15b7b062
KV		 1382 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1383 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1384 ifmgd->ssid_len, NULL, 0);
1385 goto unlock;
1386
1387 }
1388
1389 if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
1390 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
1391 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1392 ifmgd->ssid_len, NULL, 0);
f0706e82 1393 }
d0709a65 1394
15b7b062 1395 unlock:
d0709a65
JB		 1396 rcu_read_unlock();
1397
7a947080 1398 if (disassoc)
46900298 1399 ieee80211_set_disassoc(sdata, true, true,
60f8b39c 1400 WLAN_REASON_PREV_AUTH_NOT_VALID);
7a947080 1401 else
46900298 1402 mod_timer(&ifmgd->timer, jiffies +
60f8b39c 1403 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1404}
1405
1406
46900298 1407static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
f0706e82 1408{
46900298
JB		 1409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1410
f698d856 1411 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
46900298 1412 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
636a5d36
JM		 1413 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1414 /* Wait for SME to request association */
1415 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1416 ieee80211_recalc_idle(sdata->local);
636a5d36
JM		 1417 } else
1418 ieee80211_associate(sdata);
f0706e82
JB		 1419}
1420
1421
f698d856 1422static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1423 struct ieee80211_mgmt *mgmt,
1424 size_t len)
1425{
1426 u8 *pos;
1427 struct ieee802_11_elems elems;
1428
f0706e82 1429 pos = mgmt->u.auth.variable;
67a4cce4 1430 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1431 if (!elems.challenge)
f0706e82 1432 return;
46900298
JB		 1433 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1434 elems.challenge - 2, elems.challenge_len + 2,
1435 sdata->u.mgd.bssid, 1);
1436 sdata->u.mgd.auth_transaction = 4;
fe3d2c3f
JB		 1437}
1438
f698d856 1439static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1440 struct ieee80211_mgmt *mgmt,
1441 size_t len)
1442{
46900298 1443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1444 u16 auth_alg, auth_transaction, status_code;
1445
46900298 1446 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
f0706e82 1447 return;
f0706e82 1448
f4ea83dd 1449 if (len < 24 + 6)
f0706e82 1450 return;
f0706e82 1451
46900298 1452 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1453 return;
f0706e82 1454
46900298 1455 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1456 return;
f0706e82
JB		 1457
1458 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1459 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1460 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1461
46900298
JB		 1462 if (auth_alg != ifmgd->auth_alg ||
1463 auth_transaction != ifmgd->auth_transaction)
f0706e82 1464 return;
f0706e82
JB		 1465
1466 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1467 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1468 u8 algs[3];
1469 const int num_algs = ARRAY_SIZE(algs);
1470 int i, pos;
1471 algs[0] = algs[1] = algs[2] = 0xff;
46900298 1472 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
f0706e82 1473 algs[0] = WLAN_AUTH_OPEN;
46900298 1474 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
f0706e82 1475 algs[1] = WLAN_AUTH_SHARED_KEY;
46900298 1476 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
f0706e82 1477 algs[2] = WLAN_AUTH_LEAP;
46900298 1478 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
f0706e82 1479 pos = 0;
46900298 1480 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
f0706e82
JB		 1481 pos = 1;
1482 else
1483 pos = 2;
1484 for (i = 0; i < num_algs; i++) {
1485 pos++;
1486 if (pos >= num_algs)
1487 pos = 0;
46900298 1488 if (algs[pos] == ifmgd->auth_alg ||
f0706e82
JB		 1489 algs[pos] == 0xff)
1490 continue;
1491 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1492 !ieee80211_sta_wep_configured(sdata))
f0706e82 1493 continue;
46900298 1494 ifmgd->auth_alg = algs[pos];
f0706e82
JB		 1495 break;
1496 }
1497 }
1498 return;
1499 }
1500
46900298 1501 switch (ifmgd->auth_alg) {
f0706e82
JB		 1502 case WLAN_AUTH_OPEN:
1503 case WLAN_AUTH_LEAP:
636a5d36 1504 case WLAN_AUTH_FT:
46900298 1505 ieee80211_auth_completed(sdata);
6039f6d2 1506 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1507 break;
1508 case WLAN_AUTH_SHARED_KEY:
6039f6d2 1509 if (ifmgd->auth_transaction == 4) {
46900298 1510 ieee80211_auth_completed(sdata);
6039f6d2
JM		 1511 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1512 } else
46900298 1513 ieee80211_auth_challenge(sdata, mgmt, len);
f0706e82
JB		 1514 break;
1515 }
1516}
1517
1518
f698d856 1519static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1520 struct ieee80211_mgmt *mgmt,
1521 size_t len)
1522{
46900298 1523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1524 u16 reason_code;
1525
f4ea83dd 1526 if (len < 24 + 2)
f0706e82 1527 return;
f0706e82 1528
46900298 1529 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1530 return;
f0706e82
JB		 1531
1532 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1533
46900298 1534 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1535 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1536 sdata->dev->name, reason_code);
f0706e82 1537
636a5d36
JM		 1538 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1539 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1540 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1541 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
46900298
JB		 1542 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1543 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1544 IEEE80211_RETRY_AUTH_INTERVAL);
1545 }
1546
46900298
JB		 1547 ieee80211_set_disassoc(sdata, true, false, 0);
1548 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
53b46b84 1549 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1550}
1551
1552
f698d856 1553static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1554 struct ieee80211_mgmt *mgmt,
1555 size_t len)
1556{
46900298 1557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1558 u16 reason_code;
1559
f4ea83dd 1560 if (len < 24 + 2)
f0706e82 1561 return;
f0706e82 1562
46900298 1563 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1564 return;
f0706e82
JB		 1565
1566 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1567
46900298 1568 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1569 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1570 sdata->dev->name, reason_code);
f0706e82 1571
636a5d36
JM		 1572 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1573 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
46900298
JB		 1574 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1575 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1576 IEEE80211_RETRY_AUTH_INTERVAL);
1577 }
1578
46900298 1579 ieee80211_set_disassoc(sdata, false, false, reason_code);
53b46b84 1580 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1581}
1582
1583
471b3efd 1584static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1585 struct ieee80211_mgmt *mgmt,
1586 size_t len,
1587 int reassoc)
1588{
46900298 1589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1590 struct ieee80211_local *local = sdata->local;
8318d78a 1591 struct ieee80211_supported_band *sband;
f0706e82 1592 struct sta_info *sta;
881d948c 1593 u32 rates, basic_rates;
f0706e82
JB		 1594 u16 capab_info, status_code, aid;
1595 struct ieee802_11_elems elems;
bda3933a 1596 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1597 u8 *pos;
ae5eb026 1598 u32 changed = 0;
f0706e82 1599 int i, j;
ddf4ac53 1600 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1601 u16 ap_ht_cap_flags;
f0706e82
JB		 1602
1603 /* AssocResp and ReassocResp have identical structure, so process both
1604 * of them in this function. */
1605
46900298 1606 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1607 return;
f0706e82 1608
f4ea83dd 1609 if (len < 24 + 6)
f0706e82 1610 return;
f0706e82 1611
46900298 1612 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1613 return;
f0706e82
JB		 1614
1615 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1616 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1617 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1618
0c68ae26 1619 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1620 "status=%d aid=%d)\n",
0c68ae26 1621 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1622 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1623
63a5ab82
JM		 1624 pos = mgmt->u.assoc_resp.variable;
1625 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1626
1627 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1628 elems.timeout_int && elems.timeout_int_len == 5 &&
1629 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1630 u32 tu, ms;
f797eb7e 1631 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1632 ms = tu * 1024 / 1000;
1633 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1634 "comeback duration %u TU (%u ms)\n",
1635 sdata->dev->name, tu, ms);
1636 if (ms > IEEE80211_ASSOC_TIMEOUT)
46900298 1637 mod_timer(&ifmgd->timer,
63a5ab82
JM		 1638 jiffies + msecs_to_jiffies(ms));
1639 return;
1640 }
1641
f0706e82
JB		 1642 if (status_code != WLAN_STATUS_SUCCESS) {
1643 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1644 sdata->dev->name, status_code);
8a69aa93
DD		 1645 /* if this was a reassociation, ensure we try a "full"
1646 * association next time. This works around some broken APs
1647 * which do not correctly reject reassociation requests. */
46900298 1648 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
66174bbe
JM		 1649 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1650 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1651 /* Wait for SME to decide what to do next */
1652 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1653 ieee80211_recalc_idle(local);
66174bbe 1654 }
f0706e82
JB		 1655 return;
1656 }
1657
1dd84aa2
JB		 1658 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1659 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1660 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1661 aid &= ~(BIT(15) | BIT(14));
1662
f0706e82
JB		 1663 if (!elems.supp_rates) {
1664 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1665 sdata->dev->name);
f0706e82
JB		 1666 return;
1667 }
1668
f698d856 1669 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298
JB		 1670 ifmgd->aid = aid;
1671 ifmgd->ap_capab = capab_info;
f0706e82 1672
46900298
JB		 1673 kfree(ifmgd->assocresp_ies);
1674 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1675 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1676 if (ifmgd->assocresp_ies)
1677 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
f0706e82 1678
d0709a65
JB		 1679 rcu_read_lock();
1680
f0706e82 1681 /* Add STA entry for the AP */
46900298 1682 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 1683 if (!sta) {
ddf4ac53 1684 newsta = true;
d0709a65 1685
46900298 1686 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
73651ee6
JB		 1687 if (!sta) {
1688 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1689 " the AP\n", sdata->dev->name);
d0709a65 1690 rcu_read_unlock();
f0706e82
JB		 1691 return;
1692 }
f709fc69 1693
60f8b39c
JB		 1694 /* update new sta with its last rx activity */
1695 sta->last_rx = jiffies;
f709fc69 1696 }
f709fc69 1697
60f8b39c
JB		 1698 /*
1699 * FIXME: Do we really need to update the sta_info's information here?
1700 * We already know about the AP (we found it in our list) so it
1701 * should already be filled with the right info, no?
1702 * As is stands, all this is racy because typically we assume
1703 * the information that is filled in here (except flags) doesn't
1704 * change while a STA structure is alive. As such, it should move
1705 * to between the sta_info_alloc() and sta_info_insert() above.
1706 */
f709fc69 1707
3f77316c
JM		 1708 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1709 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1710 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
05e5e883 1711
60f8b39c
JB		 1712 rates = 0;
1713 basic_rates = 0;
1714 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1715
60f8b39c
JB		 1716 for (i = 0; i < elems.supp_rates_len; i++) {
1717 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1718 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1719
60f8b39c
JB		 1720 if (rate > 110)
1721 have_higher_than_11mbit = true;
1722
1723 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1724 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1725 rates |= BIT(j);
d61272cb
TW		 1726 if (is_basic)
1727 basic_rates |= BIT(j);
1728 break;
1729 }
f709fc69 1730 }
f709fc69
LCC		 1731 }
1732
60f8b39c
JB		 1733 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1734 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1735 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1736
60f8b39c
JB		 1737 if (rate > 110)
1738 have_higher_than_11mbit = true;
f0706e82 1739
60f8b39c 1740 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1741 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1742 rates |= BIT(j);
d61272cb
TW		 1743 if (is_basic)
1744 basic_rates |= BIT(j);
1745 break;
1746 }
60f8b39c 1747 }
1ebebea8 1748 }
f0706e82 1749
323ce79a 1750 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1751 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1752
1753 /* cf. IEEE 802.11 9.2.12 */
1754 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1755 have_higher_than_11mbit)
1756 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1757 else
1758 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1759
e65c2263
S		 1760 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1761 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026 1762 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1763 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1764
1765 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1766
4b7679a5 1767 rate_control_rate_init(sta);
f0706e82 1768
46900298 1769 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1770 set_sta_flags(sta, WLAN_STA_MFP);
1771
ddf4ac53 1772 if (elems.wmm_param)
60f8b39c 1773 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1774
1775 if (newsta) {
1776 int err = sta_info_insert(sta);
1777 if (err) {
1778 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1779 " the AP (error %d)\n", sdata->dev->name, err);
1780 rcu_read_unlock();
1781 return;
1782 }
1783 }
1784
1785 rcu_read_unlock();
1786
1787 if (elems.wmm_param)
46900298 1788 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1789 elems.wmm_param_len);
aa837e1d
JB		 1790 else
1791 ieee80211_set_wmm_default(sdata);
f0706e82 1792
ae5eb026 1793 if (elems.ht_info_elem && elems.wmm_param &&
46900298
JB		 1794 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1795 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026
JB		 1796 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1797 ap_ht_cap_flags);
1798
60f8b39c
JB		 1799 /* set AID and assoc capability,
1800 * ieee80211_set_associated() will tell the driver */
1801 bss_conf->aid = aid;
1802 bss_conf->assoc_capability = capab_info;
46900298 1803 ieee80211_set_associated(sdata, changed);
f0706e82 1804
15b7b062
KV		 1805 /*
1806 * initialise the time of last beacon to be the association time,
1807 * otherwise beacon loss check will trigger immediately
1808 */
1809 ifmgd->last_beacon = jiffies;
1810
46900298 1811 ieee80211_associated(sdata);
6039f6d2 1812 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1813}
1814
1815
98c8fccf
JB		 1816static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1817 struct ieee80211_mgmt *mgmt,
1818 size_t len,
1819 struct ieee80211_rx_status *rx_status,
1820 struct ieee802_11_elems *elems,
1821 bool beacon)
1822{
1823 struct ieee80211_local *local = sdata->local;
1824 int freq;
c2b13452 1825 struct ieee80211_bss *bss;
98c8fccf 1826 struct ieee80211_channel *channel;
98c8fccf
JB		 1827
1828 if (elems->ds_params && elems->ds_params_len == 1)
1829 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1830 else
1831 freq = rx_status->freq;
1832
1833 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1834
1835 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1836 return;
1837
98c8fccf 1838 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1839 channel, beacon);
98c8fccf
JB		 1840 if (!bss)
1841 return;
1842
c481ec97 1843 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
46900298 1844 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
c481ec97
S		 1845 struct ieee80211_channel_sw_ie *sw_elem =
1846 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1847 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97
S		 1848 }
1849
3e122be0 1850 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1851}
1852
1853
f698d856 1854static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1855 struct ieee80211_mgmt *mgmt,
1856 size_t len,
1857 struct ieee80211_rx_status *rx_status)
1858{
15b7b062 1859 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1860 size_t baselen;
1861 struct ieee802_11_elems elems;
1862
15b7b062
KV		 1863 ifmgd = &sdata->u.mgd;
1864
8e7cdbb6
TW		 1865 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1866 return; /* ignore ProbeResp to foreign address */
1867
ae6a44e3
EK		 1868 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1869 if (baselen > len)
1870 return;
1871
1872 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1873 &elems);
1874
98c8fccf 1875 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1876
1877 /* direct probe may be part of the association flow */
16cf438a 1878 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
9859b81e
RR		 1879 printk(KERN_DEBUG "%s direct probe responded\n",
1880 sdata->dev->name);
46900298 1881 ieee80211_authenticate(sdata);
9859b81e 1882 }
15b7b062
KV		 1883
1884 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1885 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1886}
1887
d91f36db
JB		 1888/*
1889 * This is the canonical list of information elements we care about,
1890 * the filter code also gives us all changes to the Microsoft OUI
1891 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1892 *
1893 * We implement beacon filtering in software since that means we can
1894 * avoid processing the frame here and in cfg80211, and userspace
1895 * will not be able to tell whether the hardware supports it or not.
1896 *
1897 * XXX: This list needs to be dynamic -- userspace needs to be able to
1898 * add items it requires. It also needs to be able to tell us to
1899 * look out for other vendor IEs.
1900 */
1901static const u64 care_about_ies =
1d4df3a5
JB		 1902 (1ULL << WLAN_EID_COUNTRY) |
1903 (1ULL << WLAN_EID_ERP_INFO) |
1904 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1905 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1906 (1ULL << WLAN_EID_HT_CAPABILITY) |
1907 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1908
f698d856 1909static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1910 struct ieee80211_mgmt *mgmt,
1911 size_t len,
1912 struct ieee80211_rx_status *rx_status)
1913{
d91f36db 1914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1915 size_t baselen;
1916 struct ieee802_11_elems elems;
f698d856 1917 struct ieee80211_local *local = sdata->local;
471b3efd 1918 u32 changed = 0;
d91f36db 1919 bool erp_valid, directed_tim = false;
7a5158ef 1920 u8 erp_value = 0;
d91f36db 1921 u32 ncrc;
f0706e82 1922
ae6a44e3
EK		 1923 /* Process beacon from the current BSS */
1924 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1925 if (baselen > len)
1926 return;
1927
d91f36db 1928 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1929 return;
f0706e82 1930
46900298
JB		 1931 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1932 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1933 return;
1934
92778180
JM		 1935 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1936#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1937 if (net_ratelimit()) {
1938 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1939 "to a received beacon\n", sdata->dev->name);
1940 }
1941#endif
1942 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1943 }
1944
d91f36db
JB		 1945 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1946 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1947 len - baselen, &elems,
1948 care_about_ies, ncrc);
1949
1950 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1951 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1952 ifmgd->aid);
d91f36db
JB		 1953
1954 ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim));
1955
1956 if (ncrc == ifmgd->beacon_crc)
c481ec97 1957 return;
d91f36db
JB		 1958 ifmgd->beacon_crc = ncrc;
1959
1960 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
c481ec97 1961
46900298 1962 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
fe3fa827
JB		 1963 elems.wmm_param_len);
1964
25c9c875 1965 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1966 if (directed_tim) {
572e0012
KV		 1967 if (local->hw.conf.dynamic_ps_timeout > 0) {
1968 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1969 ieee80211_hw_config(local,
1970 IEEE80211_CONF_CHANGE_PS);
1971 ieee80211_send_nullfunc(local, sdata, 0);
1972 } else {
1973 local->pspolling = true;
1974
1975 /*
1976 * Here is assumed that the driver will be
1977 * able to send ps-poll frame and receive a
1978 * response even though power save mode is
1979 * enabled, but some drivers might require
1980 * to disable power save here. This needs
1981 * to be investigated.
1982 */
1983 ieee80211_send_pspoll(local, sdata);
1984 }
a97b77b9
VN		 1985 }
1986 }
7a5158ef
JB		 1987
1988 if (elems.erp_info && elems.erp_info_len >= 1) {
1989 erp_valid = true;
1990 erp_value = elems.erp_info[0];
1991 } else {
1992 erp_valid = false;
50c4afb9 1993 }
7a5158ef
JB		 1994 changed |= ieee80211_handle_bss_capability(sdata,
1995 le16_to_cpu(mgmt->u.beacon.capab_info),
1996 erp_valid, erp_value);
f0706e82 1997
d3c990fb 1998
53d6f81c 1999 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
46900298 2000 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
ae5eb026
JB		 2001 struct sta_info *sta;
2002 struct ieee80211_supported_band *sband;
2003 u16 ap_ht_cap_flags;
2004
2005 rcu_read_lock();
2006
46900298 2007 sta = sta_info_get(local, ifmgd->bssid);
ae5eb026
JB		 2008 if (!sta) {
2009 rcu_read_unlock();
2010 return;
2011 }
2012
2013 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2014
2015 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
2016 elems.ht_cap_elem, &sta->sta.ht_cap);
2017
2018 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2019
2020 rcu_read_unlock();
2021
2022 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2023 ap_ht_cap_flags);
d3c990fb
RR		 2024 }
2025
3f2355cb
LR		 2026 if (elems.country_elem) {
2027 /* Note we are only reviewing this on beacons
2028 * for the BSSID we are associated to */
2029 regulatory_hint_11d(local->hw.wiphy,
2030 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 2031
2032 /* TODO: IBSS also needs this */
2033 if (elems.pwr_constr_elem)
2034 ieee80211_handle_pwr_constr(sdata,
2035 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2036 elems.pwr_constr_elem,
2037 elems.pwr_constr_elem_len);
3f2355cb
LR		 2038 }
2039
471b3efd 2040 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2041}
2042
46900298
JB		 2043ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
2044 struct sk_buff *skb,
2045 struct ieee80211_rx_status *rx_status)
f0706e82 2046{
f698d856 2047 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2048 struct ieee80211_mgmt *mgmt;
2049 u16 fc;
2050
2051 if (skb->len < 24)
46900298 2052 return RX_DROP_MONITOR;
f0706e82
JB		 2053
2054 mgmt = (struct ieee80211_mgmt *) skb->data;
2055 fc = le16_to_cpu(mgmt->frame_control);
2056
2057 switch (fc & IEEE80211_FCTL_STYPE) {
2058 case IEEE80211_STYPE_PROBE_REQ:
2059 case IEEE80211_STYPE_PROBE_RESP:
2060 case IEEE80211_STYPE_BEACON:
2061 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2062 case IEEE80211_STYPE_AUTH:
2063 case IEEE80211_STYPE_ASSOC_RESP:
2064 case IEEE80211_STYPE_REASSOC_RESP:
2065 case IEEE80211_STYPE_DEAUTH:
2066 case IEEE80211_STYPE_DISASSOC:
46900298
JB		 2067 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2068 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2069 return RX_QUEUED;
f0706e82
JB		 2070 }
2071
46900298 2072 return RX_DROP_MONITOR;
f0706e82
JB		 2073}
2074
f698d856 2075static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2076 struct sk_buff *skb)
2077{
2078 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2079 struct ieee80211_mgmt *mgmt;
2080 u16 fc;
2081
f0706e82
JB		 2082 rx_status = (struct ieee80211_rx_status *) skb->cb;
2083 mgmt = (struct ieee80211_mgmt *) skb->data;
2084 fc = le16_to_cpu(mgmt->frame_control);
2085
46900298
JB		 2086 switch (fc & IEEE80211_FCTL_STYPE) {
2087 case IEEE80211_STYPE_PROBE_RESP:
2088 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2089 rx_status);
2090 break;
2091 case IEEE80211_STYPE_BEACON:
2092 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2093 rx_status);
2094 break;
2095 case IEEE80211_STYPE_AUTH:
2096 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2097 break;
2098 case IEEE80211_STYPE_ASSOC_RESP:
2099 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2100 break;
2101 case IEEE80211_STYPE_REASSOC_RESP:
2102 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2103 break;
2104 case IEEE80211_STYPE_DEAUTH:
2105 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2106 break;
2107 case IEEE80211_STYPE_DISASSOC:
2108 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2109 break;
f0706e82
JB		 2110 }
2111
2112 kfree_skb(skb);
2113}
2114
9c6bd790 2115static void ieee80211_sta_timer(unsigned long data)
f0706e82 2116{
60f8b39c
JB		 2117 struct ieee80211_sub_if_data *sdata =
2118 (struct ieee80211_sub_if_data *) data;
46900298 2119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2120 struct ieee80211_local *local = sdata->local;
f0706e82 2121
5bb644a0
JB		 2122 if (local->quiescing) {
2123 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2124 return;
2125 }
2126
46900298
JB		 2127 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2128 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 2129}
2130
46900298 2131static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 2132{
46900298 2133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 2134 struct ieee80211_local *local = sdata->local;
f0706e82 2135
24487981
JB		 2136 /* Reset own TSF to allow time synchronization work. */
2137 drv_reset_tsf(local);
f0706e82 2138
46900298 2139 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
f0706e82
JB		 2140
2141
46900298
JB		 2142 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2143 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2144 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2145 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2146 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2147 ifmgd->auth_alg = WLAN_AUTH_LEAP;
636a5d36
JM		 2148 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2149 ifmgd->auth_alg = WLAN_AUTH_FT;
f0706e82 2150 else
46900298
JB		 2151 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2152 ifmgd->auth_transaction = -1;
2153 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2154 ifmgd->assoc_scan_tries = 0;
2155 ifmgd->direct_probe_tries = 0;
2156 ifmgd->auth_tries = 0;
2157 ifmgd->assoc_tries = 0;
24e64622 2158 netif_tx_stop_all_queues(sdata->dev);
f698d856 2159 netif_carrier_off(sdata->dev);
f0706e82
JB		 2160}
2161
46900298 2162static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 2163{
46900298 2164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 2165 struct ieee80211_local *local = sdata->local;
c2b13452 2166 struct ieee80211_bss *bss;
46900298
JB		 2167 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2168 u8 ssid_len = ifmgd->ssid_len;
00d3f14c
JB		 2169 u16 capa_mask = WLAN_CAPABILITY_ESS;
2170 u16 capa_val = WLAN_CAPABILITY_ESS;
2171 struct ieee80211_channel *chan = local->oper_channel;
2172
636a5d36
JM		 2173 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2174 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
00d3f14c
JB		 2175 IEEE80211_STA_AUTO_BSSID_SEL |
2176 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2177 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2178 if (sdata->default_key)
2179 capa_val |= WLAN_CAPABILITY_PRIVACY;
f0706e82 2180 }
9d139c81 2181
46900298 2182 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
00d3f14c
JB		 2183 chan = NULL;
2184
46900298 2185 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
00d3f14c
JB		 2186 bssid = NULL;
2187
46900298 2188 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
00d3f14c
JB		 2189 ssid = NULL;
2190 ssid_len = 0;
2191 }
2192
2193 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2194 bssid, ssid, ssid_len,
2195 capa_mask, capa_val);
2196
2197 if (bss) {
2198 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
46900298 2199 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
00d3f14c
JB		 2200 ieee80211_sta_set_ssid(sdata, bss->ssid,
2201 bss->ssid_len);
2202 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2203 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2204 bss->supp_rates);
46900298
JB		 2205 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2206 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
fdfacf0a 2207 else
46900298 2208 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2209
9c6bd790
JB		 2210 /* Send out direct probe if no probe resp was received or
2211 * the one we have is outdated
2212 */
00d3f14c
JB		 2213 if (!bss->last_probe_resp ||
2214 time_after(jiffies, bss->last_probe_resp
9c6bd790 2215 + IEEE80211_SCAN_RESULT_EXPIRE))
46900298 2216 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
9c6bd790 2217 else
46900298 2218 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2219
00d3f14c 2220 ieee80211_rx_bss_put(local, bss);
46900298 2221 ieee80211_sta_reset_auth(sdata);
9c6bd790
JB		 2222 return 0;
2223 } else {
46900298 2224 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
f3b85252 2225
46900298 2226 ifmgd->assoc_scan_tries++;
af88b907 2227
f3b85252
JB		 2228 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2229 ssid_len);
af88b907 2230
46900298
JB		 2231 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2232 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
e374055a 2233 } else {
46900298
JB		 2234 ifmgd->assoc_scan_tries = 0;
2235 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 2236 ieee80211_recalc_idle(local);
e374055a 2237 }
9c6bd790
JB		 2238 }
2239 return -1;
2240}
2241
2242
2243static void ieee80211_sta_work(struct work_struct *work)
2244{
2245 struct ieee80211_sub_if_data *sdata =
46900298 2246 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2247 struct ieee80211_local *local = sdata->local;
46900298 2248 struct ieee80211_if_managed *ifmgd;
9c6bd790
JB		 2249 struct sk_buff *skb;
2250
2251 if (!netif_running(sdata->dev))
2252 return;
2253
c2b13452 2254 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2255 return;
2256
46900298 2257 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2258 return;
5bb644a0
JB		 2259
2260 /*
2261 * Nothing should have been stuffed into the workqueue during
2262 * the suspend->resume cycle. If this WARN is seen then there
2263 * is a bug with either the driver suspend or something in
2264 * mac80211 stuffing into the workqueue which we haven't yet
2265 * cleared during mac80211's suspend cycle.
2266 */
2267 if (WARN_ON(local->suspended))
2268 return;
2269
46900298 2270 ifmgd = &sdata->u.mgd;
f0706e82 2271
46900298 2272 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2273 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2274
46900298
JB		 2275 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2276 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2277 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2278 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
f3b85252
JB		 2279 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2280 round_jiffies_relative(0));
9c6bd790 2281 return;
f0706e82
JB		 2282 }
2283
46900298
JB		 2284 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2285 if (ieee80211_sta_config_auth(sdata))
9c6bd790 2286 return;
46900298
JB		 2287 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2288 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
9c6bd790 2289 return;
d6f2da5b 2290
5cff20e6
JB		 2291 ieee80211_recalc_idle(local);
2292
46900298 2293 switch (ifmgd->state) {
9c6bd790
JB		 2294 case IEEE80211_STA_MLME_DISABLED:
2295 break;
2296 case IEEE80211_STA_MLME_DIRECT_PROBE:
46900298 2297 ieee80211_direct_probe(sdata);
9c6bd790
JB		 2298 break;
2299 case IEEE80211_STA_MLME_AUTHENTICATE:
46900298 2300 ieee80211_authenticate(sdata);
9c6bd790
JB		 2301 break;
2302 case IEEE80211_STA_MLME_ASSOCIATE:
46900298 2303 ieee80211_associate(sdata);
9c6bd790
JB		 2304 break;
2305 case IEEE80211_STA_MLME_ASSOCIATED:
46900298 2306 ieee80211_associated(sdata);
9c6bd790
JB		 2307 break;
2308 default:
2309 WARN_ON(1);
2310 break;
2311 }
2312
46900298 2313 if (ieee80211_privacy_mismatch(sdata)) {
9c6bd790
JB		 2314 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2315 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2316
46900298 2317 ieee80211_set_disassoc(sdata, false, true,
9c6bd790
JB		 2318 WLAN_REASON_UNSPECIFIED);
2319 }
f0706e82
JB		 2320}
2321
9c6bd790
JB		 2322static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2323{
ad935687
KV		 2324 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2325 /*
2326 * Need to update last_beacon to avoid beacon loss
2327 * test to trigger.
2328 */
2329 sdata->u.mgd.last_beacon = jiffies;
2330
2331
9c6bd790 2332 queue_work(sdata->local->hw.workqueue,
46900298 2333 &sdata->u.mgd.work);
ad935687 2334 }
9c6bd790 2335}
f0706e82 2336
5bb644a0
JB		 2337#ifdef CONFIG_PM
2338void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2339{
2340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2341
2342 /*
2343 * we need to use atomic bitops for the running bits
2344 * only because both timers might fire at the same
2345 * time -- the code here is properly synchronised.
2346 */
2347
2348 cancel_work_sync(&ifmgd->work);
2349 cancel_work_sync(&ifmgd->beacon_loss_work);
2350 if (del_timer_sync(&ifmgd->timer))
2351 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2352
2353 cancel_work_sync(&ifmgd->chswitch_work);
2354 if (del_timer_sync(&ifmgd->chswitch_timer))
2355 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2356}
2357
2358void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2359{
2360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2361
2362 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2363 add_timer(&ifmgd->timer);
2364 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2365 add_timer(&ifmgd->chswitch_timer);
2366}
2367#endif
2368
9c6bd790
JB		 2369/* interface setup */
2370void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2371{
46900298 2372 struct ieee80211_if_managed *ifmgd;
bbbdff9e 2373 u32 hw_flags;
988c0f72 2374
46900298
JB		 2375 ifmgd = &sdata->u.mgd;
2376 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2377 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2378 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2379 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2380 (unsigned long) sdata);
46900298 2381 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2382 (unsigned long) sdata);
46900298 2383 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2384
46900298
JB		 2385 ifmgd->capab = WLAN_CAPABILITY_ESS;
2386 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
9c6bd790 2387 IEEE80211_AUTH_ALG_SHARED_KEY;
46900298 2388 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
9c6bd790
JB		 2389 IEEE80211_STA_AUTO_BSSID_SEL |
2390 IEEE80211_STA_AUTO_CHANNEL_SEL;
176be728 2391 if (sdata->local->hw.queues >= 4)
46900298 2392 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e
JB		 2393
2394 hw_flags = sdata->local->hw.flags;
2395
2396 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2397 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2398 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2399 }
f0706e82
JB		 2400}
2401
9c6bd790 2402/* configuration hooks */
46900298 2403void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
60f8b39c 2404{
46900298 2405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2406 struct ieee80211_local *local = sdata->local;
60f8b39c 2407
46900298 2408 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2409 return;
60f8b39c 2410
46900298 2411 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
9c6bd790 2412 IEEE80211_STA_AUTO_BSSID_SEL)) &&
46900298 2413 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
9c6bd790 2414 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2415
46900298
JB		 2416 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2417 ieee80211_set_disassoc(sdata, true, true,
9c6bd790 2418 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2419
636a5d36
JM		 2420 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2421 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2422 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2423 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2424 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
46900298 2425 queue_work(local->hw.workqueue, &ifmgd->work);
9c6bd790
JB		 2426 }
2427}
60f8b39c 2428
79f6440c
AF		 2429int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2430{
2431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2432
79f6440c
AF		 2433 if (ifmgd->ssid_len)
2434 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2435 else
2436 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2437
2438 return 0;
2439}
2440
9c6bd790
JB		 2441int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2442{
46900298 2443 struct ieee80211_if_managed *ifmgd;
60f8b39c 2444
9c6bd790
JB		 2445 if (len > IEEE80211_MAX_SSID_LEN)
2446 return -EINVAL;
2447
46900298 2448 ifmgd = &sdata->u.mgd;
9c6bd790 2449
46900298 2450 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
a299542e
JM		 2451 /*
2452 * Do not use reassociation if SSID is changed (different ESS).
2453 */
2454 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
46900298
JB		 2455 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2456 memcpy(ifmgd->ssid, ssid, len);
2457 ifmgd->ssid_len = len;
60f8b39c 2458 }
60f8b39c 2459
79f6440c 2460 return ieee80211_sta_commit(sdata);
9c6bd790
JB		 2461}
2462
2463int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2464{
46900298
JB		 2465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2466 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2467 *len = ifmgd->ssid_len;
9c6bd790
JB		 2468 return 0;
2469}
2470
2471int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2472{
46900298 2473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2474
dfe67012 2475 if (is_valid_ether_addr(bssid)) {
46900298
JB		 2476 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2477 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
dfe67012 2478 } else {
46900298
JB		 2479 memset(ifmgd->bssid, 0, ETH_ALEN);
2480 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
dfe67012
AF		 2481 }
2482
2d0ddec5
JB		 2483 if (netif_running(sdata->dev))
2484 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
60f8b39c 2485
79f6440c 2486 return ieee80211_sta_commit(sdata);
9c6bd790
JB		 2487}
2488
636a5d36
JM		 2489int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2490 const char *ie, size_t len)
9c6bd790 2491{
46900298 2492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2493
46900298 2494 kfree(ifmgd->extra_ie);
9c6bd790 2495 if (len == 0) {
46900298
JB		 2496 ifmgd->extra_ie = NULL;
2497 ifmgd->extra_ie_len = 0;
60f8b39c 2498 return 0;
60f8b39c 2499 }
46900298
JB		 2500 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2501 if (!ifmgd->extra_ie) {
2502 ifmgd->extra_ie_len = 0;
9c6bd790
JB		 2503 return -ENOMEM;
2504 }
46900298
JB		 2505 memcpy(ifmgd->extra_ie, ie, len);
2506 ifmgd->extra_ie_len = len;
9c6bd790 2507 return 0;
60f8b39c
JB		 2508}
2509
f698d856 2510int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2511{
f4ea83dd 2512 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2513 sdata->dev->name, reason);
f0706e82 2514
46900298 2515 ieee80211_set_disassoc(sdata, true, true, reason);
f0706e82
JB		 2516 return 0;
2517}
2518
f698d856 2519int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2520{
46900298 2521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2522
f4ea83dd 2523 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2524 sdata->dev->name, reason);
f0706e82 2525
46900298
JB		 2526 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2527 return -ENOLINK;
f0706e82 2528
46900298 2529 ieee80211_set_disassoc(sdata, false, true, reason);
f0706e82
JB		 2530 return 0;
2531}
84363e6e 2532
9c6bd790
JB		 2533/* scan finished notification */
2534void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2535{
2536 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
9c6bd790
JB		 2537
2538 /* Restart STA timers */
2539 rcu_read_lock();
2540 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2541 ieee80211_restart_sta_timer(sdata);
2542 rcu_read_unlock();
2543}
10f644a4
JB		 2544
2545int ieee80211_max_network_latency(struct notifier_block *nb,
2546 unsigned long data, void *dummy)
2547{
2548 s32 latency_usec = (s32) data;
2549 struct ieee80211_local *local =
2550 container_of(nb, struct ieee80211_local,
2551 network_latency_notifier);
2552
2553 mutex_lock(&local->iflist_mtx);
2554 ieee80211_recalc_ps(local, latency_usec);
2555 mutex_unlock(&local->iflist_mtx);
2556
2557 return 0;
2558}
Linux kernel - Deliverables
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