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mac80211: rework MLME for multiple authentications
[mirror_ubuntu-artful-kernel.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
JB		 29
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
34#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
a971be22 35#define IEEE80211_PROBE_WAIT (HZ / 5)
f0706e82 36
5bb644a0
JB		 37#define TMR_RUNNING_TIMER 0
38#define TMR_RUNNING_CHANSW 1
39
77fdaa12
JB		 40/*
41 * All cfg80211 functions have to be called outside a locked
42 * section so that they can acquire a lock themselves... This
43 * is much simpler than queuing up things in cfg80211, but we
44 * do need some indirection for that here.
45 */
46enum rx_mgmt_action {
47 /* no action required */
48 RX_MGMT_NONE,
49
50 /* caller must call cfg80211_send_rx_auth() */
51 RX_MGMT_CFG80211_AUTH,
52
53 /* caller must call cfg80211_send_rx_assoc() */
54 RX_MGMT_CFG80211_ASSOC,
55
56 /* caller must call cfg80211_send_deauth() */
57 RX_MGMT_CFG80211_DEAUTH,
58
59 /* caller must call cfg80211_send_disassoc() */
60 RX_MGMT_CFG80211_DISASSOC,
61
62 /* caller must call cfg80211_auth_timeout() & free work */
63 RX_MGMT_CFG80211_AUTH_TO,
64
65 /* caller must call cfg80211_assoc_timeout() & free work */
66 RX_MGMT_CFG80211_ASSOC_TO,
67};
68
5484e237 69/* utils */
77fdaa12
JB		 70static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
71{
72 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
73}
74
5484e237 75static int ecw2cw(int ecw)
60f8b39c 76{
5484e237 77 return (1 << ecw) - 1;
60f8b39c
JB		 78}
79
c2b13452 80static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 81 struct ieee80211_supported_band *sband,
881d948c 82 u32 *rates)
9ac19a90
JB		 83{
84 int i, j, count;
85 *rates = 0;
86 count = 0;
87 for (i = 0; i < bss->supp_rates_len; i++) {
88 int rate = (bss->supp_rates[i] & 0x7F) * 5;
89
90 for (j = 0; j < sband->n_bitrates; j++)
91 if (sband->bitrates[j].bitrate == rate) {
92 *rates |= BIT(j);
93 count++;
94 break;
95 }
96 }
97
98 return count;
99}
100
d5522e03
JB		 101/*
102 * ieee80211_enable_ht should be called only after the operating band
103 * has been determined as ht configuration depends on the hw's
104 * HT abilities for a specific band.
105 */
106static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
107 struct ieee80211_ht_info *hti,
77fdaa12 108 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 109{
110 struct ieee80211_local *local = sdata->local;
111 struct ieee80211_supported_band *sband;
d5522e03
JB		 112 struct sta_info *sta;
113 u32 changed = 0;
9ed6bcce 114 u16 ht_opmode;
d5522e03
JB		 115 bool enable_ht = true, ht_changed;
116 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
117
118 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
119
d5522e03
JB		 120 /* HT is not supported */
121 if (!sband->ht_cap.ht_supported)
122 enable_ht = false;
123
124 /* check that channel matches the right operating channel */
125 if (local->hw.conf.channel->center_freq !=
126 ieee80211_channel_to_frequency(hti->control_chan))
127 enable_ht = false;
128
129 if (enable_ht) {
130 channel_type = NL80211_CHAN_HT20;
131
132 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
133 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
134 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
135 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
136 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 137 if (!(local->hw.conf.channel->flags &
138 IEEE80211_CHAN_NO_HT40PLUS))
139 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 140 break;
141 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 142 if (!(local->hw.conf.channel->flags &
143 IEEE80211_CHAN_NO_HT40MINUS))
144 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 145 break;
146 }
147 }
148 }
149
150 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
151 channel_type != local->hw.conf.channel_type;
152
153 local->oper_channel_type = channel_type;
154
155 if (ht_changed) {
156 /* channel_type change automatically detected */
157 ieee80211_hw_config(local, 0);
158
159 rcu_read_lock();
77fdaa12 160 sta = sta_info_get(local, bssid);
d5522e03
JB		 161 if (sta)
162 rate_control_rate_update(local, sband, sta,
163 IEEE80211_RC_HT_CHANGED);
d5522e03 164 rcu_read_unlock();
d5522e03
JB		 165 }
166
167 /* disable HT */
168 if (!enable_ht)
169 return 0;
170
9ed6bcce 171 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 172
173 /* if bss configuration changed store the new one */
413ad50a
JB		 174 if (!sdata->ht_opmode_valid ||
175 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 176 changed |= BSS_CHANGED_HT;
9ed6bcce 177 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 178 sdata->ht_opmode_valid = true;
d5522e03
JB		 179 }
180
181 return changed;
182}
183
9c6bd790
JB		 184/* frame sending functions */
185
77fdaa12
JB		 186static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
187 struct ieee80211_mgd_work *wk)
9ac19a90 188{
46900298 189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 190 struct ieee80211_local *local = sdata->local;
191 struct sk_buff *skb;
192 struct ieee80211_mgmt *mgmt;
517357c6
JB		 193 u8 *pos;
194 const u8 *ies, *ht_ie;
9ac19a90
JB		 195 int i, len, count, rates_len, supp_rates_len;
196 u16 capab;
9ac19a90
JB		 197 int wmm = 0;
198 struct ieee80211_supported_band *sband;
881d948c 199 u32 rates = 0;
9ac19a90
JB		 200
201 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12
JB		 202 sizeof(*mgmt) + 200 + wk->ie_len +
203 wk->ssid_len);
9ac19a90
JB		 204 if (!skb) {
205 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
206 "frame\n", sdata->dev->name);
207 return;
208 }
209 skb_reserve(skb, local->hw.extra_tx_headroom);
210
211 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
212
46900298 213 capab = ifmgd->capab;
9ac19a90
JB		 214
215 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
216 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
217 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
218 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
219 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
220 }
221
77fdaa12
JB		 222 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
223 capab |= WLAN_CAPABILITY_PRIVACY;
224 if (wk->bss->wmm_used)
225 wmm = 1;
9ac19a90 226
77fdaa12
JB		 227 /* get all rates supported by the device and the AP as
228 * some APs don't like getting a superset of their rates
229 * in the association request (e.g. D-Link DAP 1353 in
230 * b-only mode) */
231 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
9ac19a90 232
77fdaa12
JB		 233 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
234 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
235 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 236
237 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
238 memset(mgmt, 0, 24);
77fdaa12 239 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 240 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 241 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 242
77fdaa12 243 if (!is_zero_ether_addr(wk->prev_bssid)) {
9ac19a90
JB		 244 skb_put(skb, 10);
245 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
246 IEEE80211_STYPE_REASSOC_REQ);
247 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
248 mgmt->u.reassoc_req.listen_interval =
249 cpu_to_le16(local->hw.conf.listen_interval);
77fdaa12 250 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
9ac19a90
JB		 251 ETH_ALEN);
252 } else {
253 skb_put(skb, 4);
254 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
255 IEEE80211_STYPE_ASSOC_REQ);
256 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 257 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 258 cpu_to_le16(local->hw.conf.listen_interval);
259 }
260
261 /* SSID */
77fdaa12 262 ies = pos = skb_put(skb, 2 + wk->ssid_len);
9ac19a90 263 *pos++ = WLAN_EID_SSID;
77fdaa12
JB		 264 *pos++ = wk->ssid_len;
265 memcpy(pos, wk->ssid, wk->ssid_len);
9ac19a90
JB		 266
267 /* add all rates which were marked to be used above */
268 supp_rates_len = rates_len;
269 if (supp_rates_len > 8)
270 supp_rates_len = 8;
271
272 len = sband->n_bitrates;
273 pos = skb_put(skb, supp_rates_len + 2);
274 *pos++ = WLAN_EID_SUPP_RATES;
275 *pos++ = supp_rates_len;
276
277 count = 0;
278 for (i = 0; i < sband->n_bitrates; i++) {
279 if (BIT(i) & rates) {
280 int rate = sband->bitrates[i].bitrate;
281 *pos++ = (u8) (rate / 5);
282 if (++count == 8)
283 break;
284 }
285 }
286
287 if (rates_len > count) {
288 pos = skb_put(skb, rates_len - count + 2);
289 *pos++ = WLAN_EID_EXT_SUPP_RATES;
290 *pos++ = rates_len - count;
291
292 for (i++; i < sband->n_bitrates; i++) {
293 if (BIT(i) & rates) {
294 int rate = sband->bitrates[i].bitrate;
295 *pos++ = (u8) (rate / 5);
296 }
297 }
298 }
299
300 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
301 /* 1. power capabilities */
302 pos = skb_put(skb, 4);
303 *pos++ = WLAN_EID_PWR_CAPABILITY;
304 *pos++ = 2;
305 *pos++ = 0; /* min tx power */
306 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
307
308 /* 2. supported channels */
309 /* TODO: get this in reg domain format */
310 pos = skb_put(skb, 2 * sband->n_channels + 2);
311 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
312 *pos++ = 2 * sband->n_channels;
313 for (i = 0; i < sband->n_channels; i++) {
314 *pos++ = ieee80211_frequency_to_channel(
315 sband->channels[i].center_freq);
316 *pos++ = 1; /* one channel in the subband*/
317 }
318 }
319
77fdaa12
JB		 320 if (wk->ie_len && wk->ie) {
321 pos = skb_put(skb, wk->ie_len);
322 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 323 }
324
46900298 325 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 326 pos = skb_put(skb, 9);
327 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
328 *pos++ = 7; /* len */
329 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
330 *pos++ = 0x50;
331 *pos++ = 0xf2;
332 *pos++ = 2; /* WME */
333 *pos++ = 0; /* WME info */
334 *pos++ = 1; /* WME ver */
335 *pos++ = 0;
336 }
337
338 /* wmm support is a must to HT */
eb46936b
VT		 339 /*
340 * IEEE802.11n does not allow TKIP/WEP as pairwise
341 * ciphers in HT mode. We still associate in non-ht
342 * mode (11a/b/g) if any one of these ciphers is
343 * configured as pairwise.
344 */
46900298 345 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 346 sband->ht_cap.ht_supported &&
77fdaa12 347 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 348 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 349 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 350 struct ieee80211_ht_info *ht_info =
351 (struct ieee80211_ht_info *)(ht_ie + 2);
352 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 353 __le16 tmp;
354 u32 flags = local->hw.conf.channel->flags;
355
d9fe60de
JB		 356 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
357 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 358 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 359 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 360 cap &= ~IEEE80211_HT_CAP_SGI_40;
361 }
362 break;
d9fe60de 363 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 364 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 365 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 366 cap &= ~IEEE80211_HT_CAP_SGI_40;
367 }
368 break;
369 }
370
371 tmp = cpu_to_le16(cap);
372 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
373 *pos++ = WLAN_EID_HT_CAPABILITY;
374 *pos++ = sizeof(struct ieee80211_ht_cap);
375 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
376 memcpy(pos, &tmp, sizeof(u16));
377 pos += sizeof(u16);
378 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 379 *pos++ = sband->ht_cap.ampdu_factor |
380 (sband->ht_cap.ampdu_density << 2);
381 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 382 }
383
e50db65c 384 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 385}
386
387
ef422bc0 388static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
77fdaa12 389 const u8 *bssid, u16 stype, u16 reason)
9ac19a90
JB		 390{
391 struct ieee80211_local *local = sdata->local;
46900298 392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 393 struct sk_buff *skb;
394 struct ieee80211_mgmt *mgmt;
9aed3cc1 395
65fc73ac 396 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 397 if (!skb) {
ef422bc0
JB		 398 printk(KERN_DEBUG "%s: failed to allocate buffer for "
399 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 400 return;
401 }
402 skb_reserve(skb, local->hw.extra_tx_headroom);
403
404 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
405 memset(mgmt, 0, 24);
77fdaa12 406 memcpy(mgmt->da, bssid, ETH_ALEN);
9ac19a90 407 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 408 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 409 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 410 skb_put(skb, 2);
ef422bc0 411 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 412 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
413
53b46b84 414 if (stype == IEEE80211_STYPE_DEAUTH)
e6d6e342
JB		 415 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len,
416 GFP_KERNEL);
53b46b84 417 else
e6d6e342
JB		 418 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len,
419 GFP_KERNEL);
46900298 420 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 421}
422
572e0012
KV		 423void ieee80211_send_pspoll(struct ieee80211_local *local,
424 struct ieee80211_sub_if_data *sdata)
425{
46900298 426 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 427 struct ieee80211_pspoll *pspoll;
428 struct sk_buff *skb;
429 u16 fc;
430
431 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
432 if (!skb) {
433 printk(KERN_DEBUG "%s: failed to allocate buffer for "
434 "pspoll frame\n", sdata->dev->name);
435 return;
436 }
437 skb_reserve(skb, local->hw.extra_tx_headroom);
438
439 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
440 memset(pspoll, 0, sizeof(*pspoll));
441 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
442 pspoll->frame_control = cpu_to_le16(fc);
46900298 443 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 444
445 /* aid in PS-Poll has its two MSBs each set to 1 */
446 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
447
46900298 448 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 449 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
450
451 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 452}
453
965bedad
JB		 454void ieee80211_send_nullfunc(struct ieee80211_local *local,
455 struct ieee80211_sub_if_data *sdata,
456 int powersave)
457{
458 struct sk_buff *skb;
459 struct ieee80211_hdr *nullfunc;
460 __le16 fc;
461
462 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
463 return;
464
465 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
466 if (!skb) {
467 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
468 "frame\n", sdata->dev->name);
469 return;
470 }
471 skb_reserve(skb, local->hw.extra_tx_headroom);
472
473 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
474 memset(nullfunc, 0, 24);
475 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
476 IEEE80211_FCTL_TODS);
477 if (powersave)
478 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
479 nullfunc->frame_control = fc;
480 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
481 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
482 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
483
484 ieee80211_tx_skb(sdata, skb, 0);
485}
486
cc32abd4
JB		 487/* spectrum management related things */
488static void ieee80211_chswitch_work(struct work_struct *work)
489{
490 struct ieee80211_sub_if_data *sdata =
491 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
493
494 if (!netif_running(sdata->dev))
495 return;
496
77fdaa12
JB		 497 mutex_lock(&ifmgd->mtx);
498 if (!ifmgd->associated)
499 goto out;
cc32abd4
JB		 500
501 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 502 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
503
cc32abd4 504 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 505 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 506
cc32abd4
JB		 507 ieee80211_wake_queues_by_reason(&sdata->local->hw,
508 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 509 out:
510 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
511 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 512}
513
514static void ieee80211_chswitch_timer(unsigned long data)
515{
516 struct ieee80211_sub_if_data *sdata =
517 (struct ieee80211_sub_if_data *) data;
518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
519
5bb644a0
JB		 520 if (sdata->local->quiescing) {
521 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
522 return;
523 }
524
cc32abd4
JB		 525 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
526}
527
528void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
529 struct ieee80211_channel_sw_ie *sw_elem,
530 struct ieee80211_bss *bss)
531{
532 struct ieee80211_channel *new_ch;
533 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
534 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
535
77fdaa12
JB		 536 ASSERT_MGD_MTX(ifmgd);
537
538 if (!ifmgd->associated)
cc32abd4
JB		 539 return;
540
541 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
542 return;
543
544 /* Disregard subsequent beacons if we are already running a timer
545 processing a CSA */
546
547 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
548 return;
549
550 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
551 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
552 return;
553
554 sdata->local->csa_channel = new_ch;
555
556 if (sw_elem->count <= 1) {
557 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
558 } else {
559 ieee80211_stop_queues_by_reason(&sdata->local->hw,
560 IEEE80211_QUEUE_STOP_REASON_CSA);
561 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
562 mod_timer(&ifmgd->chswitch_timer,
563 jiffies +
564 msecs_to_jiffies(sw_elem->count *
565 bss->cbss.beacon_interval));
566 }
567}
568
569static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
570 u16 capab_info, u8 *pwr_constr_elem,
571 u8 pwr_constr_elem_len)
572{
573 struct ieee80211_conf *conf = &sdata->local->hw.conf;
574
575 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
576 return;
577
578 /* Power constraint IE length should be 1 octet */
579 if (pwr_constr_elem_len != 1)
580 return;
581
582 if ((*pwr_constr_elem <= conf->channel->max_power) &&
583 (*pwr_constr_elem != sdata->local->power_constr_level)) {
584 sdata->local->power_constr_level = *pwr_constr_elem;
585 ieee80211_hw_config(sdata->local, 0);
586 }
587}
588
965bedad
JB		 589/* powersave */
590static void ieee80211_enable_ps(struct ieee80211_local *local,
591 struct ieee80211_sub_if_data *sdata)
592{
593 struct ieee80211_conf *conf = &local->hw.conf;
594
d5edaedc
JB		 595 /*
596 * If we are scanning right now then the parameters will
597 * take effect when scan finishes.
598 */
599 if (local->hw_scanning || local->sw_scanning)
600 return;
601
965bedad
JB		 602 if (conf->dynamic_ps_timeout > 0 &&
603 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
604 mod_timer(&local->dynamic_ps_timer, jiffies +
605 msecs_to_jiffies(conf->dynamic_ps_timeout));
606 } else {
607 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
608 ieee80211_send_nullfunc(local, sdata, 1);
609 conf->flags |= IEEE80211_CONF_PS;
610 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
611 }
612}
613
614static void ieee80211_change_ps(struct ieee80211_local *local)
615{
616 struct ieee80211_conf *conf = &local->hw.conf;
617
618 if (local->ps_sdata) {
965bedad
JB		 619 ieee80211_enable_ps(local, local->ps_sdata);
620 } else if (conf->flags & IEEE80211_CONF_PS) {
621 conf->flags &= ~IEEE80211_CONF_PS;
622 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
623 del_timer_sync(&local->dynamic_ps_timer);
624 cancel_work_sync(&local->dynamic_ps_enable_work);
625 }
626}
627
628/* need to hold RTNL or interface lock */
10f644a4 629void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 630{
631 struct ieee80211_sub_if_data *sdata, *found = NULL;
632 int count = 0;
633
634 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
635 local->ps_sdata = NULL;
636 return;
637 }
638
639 list_for_each_entry(sdata, &local->interfaces, list) {
640 if (!netif_running(sdata->dev))
641 continue;
642 if (sdata->vif.type != NL80211_IFTYPE_STATION)
643 continue;
644 found = sdata;
645 count++;
646 }
647
43f78531 648 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 649 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
4e751843 650 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
10f644a4
JB		 651 s32 beaconint_us;
652
653 if (latency < 0)
654 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
655
656 beaconint_us = ieee80211_tu_to_usec(
657 found->vif.bss_conf.beacon_int);
658
04fe2037 659 if (beaconint_us > latency) {
10f644a4 660 local->ps_sdata = NULL;
04fe2037
JB		 661 } else {
662 u8 dtimper = found->vif.bss_conf.dtim_period;
663 int maxslp = 1;
664
665 if (dtimper > 1)
666 maxslp = min_t(int, dtimper,
667 latency / beaconint_us);
668
9ccebe61 669 local->hw.conf.max_sleep_period = maxslp;
10f644a4 670 local->ps_sdata = found;
04fe2037 671 }
10f644a4 672 } else {
965bedad 673 local->ps_sdata = NULL;
10f644a4 674 }
965bedad
JB		 675
676 ieee80211_change_ps(local);
677}
678
679void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
680{
681 struct ieee80211_local *local =
682 container_of(work, struct ieee80211_local,
683 dynamic_ps_disable_work);
684
685 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
686 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
687 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
688 }
689
690 ieee80211_wake_queues_by_reason(&local->hw,
691 IEEE80211_QUEUE_STOP_REASON_PS);
692}
693
694void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
695{
696 struct ieee80211_local *local =
697 container_of(work, struct ieee80211_local,
698 dynamic_ps_enable_work);
699 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
700
701 /* can only happen when PS was just disabled anyway */
702 if (!sdata)
703 return;
704
705 if (local->hw.conf.flags & IEEE80211_CONF_PS)
706 return;
707
708 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
709 ieee80211_send_nullfunc(local, sdata, 1);
710
711 local->hw.conf.flags |= IEEE80211_CONF_PS;
712 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
713}
714
715void ieee80211_dynamic_ps_timer(unsigned long data)
716{
717 struct ieee80211_local *local = (void *) data;
718
5bb644a0
JB		 719 if (local->quiescing)
720 return;
721
965bedad
JB		 722 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
723}
724
60f8b39c 725/* MLME */
f698d856 726static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 727 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 728 u8 *wmm_param, size_t wmm_param_len)
729{
f0706e82
JB		 730 struct ieee80211_tx_queue_params params;
731 size_t left;
732 int count;
733 u8 *pos;
734
46900298 735 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 736 return;
737
738 if (!wmm_param)
739 return;
740
f0706e82
JB		 741 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
742 return;
743 count = wmm_param[6] & 0x0f;
46900298 744 if (count == ifmgd->wmm_last_param_set)
f0706e82 745 return;
46900298 746 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 747
748 pos = wmm_param + 8;
749 left = wmm_param_len - 8;
750
751 memset(&params, 0, sizeof(params));
752
f0706e82
JB		 753 local->wmm_acm = 0;
754 for (; left >= 4; left -= 4, pos += 4) {
755 int aci = (pos[0] >> 5) & 0x03;
756 int acm = (pos[0] >> 4) & 0x01;
757 int queue;
758
759 switch (aci) {
0eeb59fe 760 case 1: /* AC_BK */
e100bb64 761 queue = 3;
988c0f72 762 if (acm)
0eeb59fe 763 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 764 break;
0eeb59fe 765 case 2: /* AC_VI */
e100bb64 766 queue = 1;
988c0f72 767 if (acm)
0eeb59fe 768 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 769 break;
0eeb59fe 770 case 3: /* AC_VO */
e100bb64 771 queue = 0;
988c0f72 772 if (acm)
0eeb59fe 773 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 774 break;
0eeb59fe 775 case 0: /* AC_BE */
f0706e82 776 default:
e100bb64 777 queue = 2;
988c0f72 778 if (acm)
0eeb59fe 779 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 780 break;
781 }
782
783 params.aifs = pos[0] & 0x0f;
784 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
785 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 786 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 787#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 788 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 789 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 790 wiphy_name(local->hw.wiphy), queue, aci, acm,
791 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 792#endif
24487981 793 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 794 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 795 "parameters for queue %d\n",
796 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 797 }
798}
799
7a5158ef
JB		 800static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
801 u16 capab, bool erp_valid, u8 erp)
5628221c 802{
bda3933a 803 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 804 u32 changed = 0;
7a5158ef
JB		 805 bool use_protection;
806 bool use_short_preamble;
807 bool use_short_slot;
808
809 if (erp_valid) {
810 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
811 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
812 } else {
813 use_protection = false;
814 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
815 }
816
817 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 818
471b3efd 819 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 820 bss_conf->use_cts_prot = use_protection;
821 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 822 }
7e9ed188 823
d43c7b37 824 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 825 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 826 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 827 }
d9430a32 828
7a5158ef 829 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 830 bss_conf->use_short_slot = use_short_slot;
831 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 832 }
833
834 return changed;
835}
836
f698d856 837static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
77fdaa12 838 struct ieee80211_bss *bss,
ae5eb026 839 u32 bss_info_changed)
f0706e82 840{
471b3efd 841 struct ieee80211_local *local = sdata->local;
d6f2da5b 842
ae5eb026 843 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 844 /* set timing information */
845 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
846 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
847 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 848
77fdaa12
JB		 849 bss_info_changed |= BSS_CHANGED_BEACON_INT;
850 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
851 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 852
77fdaa12
JB		 853 sdata->u.mgd.associated = bss;
854 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 855
9ac19a90 856 ieee80211_led_assoc(local, 1);
9306102e 857
bda3933a 858 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 859 /*
860 * For now just always ask the driver to update the basic rateset
861 * when we have associated, we aren't checking whether it actually
862 * changed or not.
863 */
ae5eb026 864 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 865
866 /* And the BSSID changed - we're associated now */
867 bss_info_changed |= BSS_CHANGED_BSSID;
868
ae5eb026 869 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 870
965bedad 871 /* will be same as sdata */
04fe2037
JB		 872 if (local->ps_sdata) {
873 mutex_lock(&local->iflist_mtx);
874 ieee80211_recalc_ps(local, -1);
875 mutex_unlock(&local->iflist_mtx);
876 }
e0cb686f 877
9ac19a90
JB		 878 netif_tx_start_all_queues(sdata->dev);
879 netif_carrier_on(sdata->dev);
f0706e82
JB		 880}
881
77fdaa12
JB		 882static enum rx_mgmt_action __must_check
883ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
884 struct ieee80211_mgd_work *wk)
f0706e82 885{
46900298 886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 887 struct ieee80211_local *local = sdata->local;
46900298 888
77fdaa12
JB		 889 wk->tries++;
890 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 891 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 892 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 893
894 /*
895 * Most likely AP is not in the range so remove the
77fdaa12 896 * bss struct for that AP.
7a947080 897 */
77fdaa12 898 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 899
900 /*
901 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 902 * due to work needing to be done. Hence, queue the STAs work
903 * again for that.
11432379
HS		 904 */
905 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 906 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 907 }
f0706e82 908
77fdaa12
JB		 909 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
910 sdata->dev->name, wk->bss->cbss.bssid,
911 wk->tries);
f0706e82 912
77fdaa12
JB		 913 /*
914 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 915 * will not answer to direct packet in unassociated state.
916 */
77fdaa12
JB		 917 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
918
919 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
920 mod_timer(&ifmgd->timer, wk->timeout);
9ac19a90 921
77fdaa12 922 return RX_MGMT_NONE;
60f8b39c 923}
f0706e82 924
9ac19a90 925
77fdaa12
JB		 926static enum rx_mgmt_action __must_check
927ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
928 struct ieee80211_mgd_work *wk)
f0706e82 929{
46900298 930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 931 struct ieee80211_local *local = sdata->local;
46900298 932
77fdaa12
JB		 933 wk->tries++;
934 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 935 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 936 " timed out\n",
77fdaa12
JB		 937 sdata->dev->name, wk->bss->cbss.bssid);
938
939 /*
940 * Most likely AP is not in the range so remove the
941 * bss struct for that AP.
942 */
943 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 944
945 /*
946 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 947 * due to work needing to be done. Hence, queue the STAs work
948 * again for that.
11432379
HS		 949 */
950 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 951 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 952 }
f0706e82 953
77fdaa12
JB		 954 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
955 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
956
957 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
958 wk->bss->cbss.bssid, 0);
959 wk->auth_transaction = 2;
f0706e82 960
77fdaa12
JB		 961 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
962 mod_timer(&ifmgd->timer, wk->timeout);
9ac19a90 963
77fdaa12 964 return RX_MGMT_NONE;
f0706e82
JB		 965}
966
aa458d17 967static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
77fdaa12 968 const u8 *bssid, bool deauth)
aa458d17 969{
46900298 970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 971 struct ieee80211_local *local = sdata->local;
972 struct sta_info *sta;
e0cb686f 973 u32 changed = 0, config_changed = 0;
aa458d17 974
77fdaa12
JB		 975 ASSERT_MGD_MTX(ifmgd);
976
977 ifmgd->associated = NULL;
978 memset(ifmgd->bssid, 0, ETH_ALEN);
979
980 /*
981 * we need to commit the associated = NULL change because the
982 * scan code uses that to determine whether this iface should
983 * go to/wake up from powersave or not -- and could otherwise
984 * wake the queues erroneously.
985 */
986 smp_mb();
987
988 /*
989 * Thus, we can only afterwards stop the queues -- to account
990 * for the case where another CPU is finishing a scan at this
991 * time -- we don't want the scan code to enable queues.
992 */
aa458d17 993
24e64622 994 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 995 netif_carrier_off(sdata->dev);
996
1fa6f4af 997 rcu_read_lock();
77fdaa12 998 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 999 if (sta)
1000 ieee80211_sta_tear_down_BA_sessions(sta);
1001 rcu_read_unlock();
aa458d17 1002
f5e5bf25
TW		 1003 changed |= ieee80211_reset_erp_info(sdata);
1004
f5e5bf25 1005 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1006 changed |= BSS_CHANGED_ASSOC;
1007 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1008
aa837e1d
JB		 1009 ieee80211_set_wmm_default(sdata);
1010
5cff20e6
JB		 1011 ieee80211_recalc_idle(local);
1012
4797938c 1013 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1014 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1015
413ad50a
JB		 1016 /* on the next assoc, re-program HT parameters */
1017 sdata->ht_opmode_valid = false;
1018
a8302de9
VT		 1019 local->power_constr_level = 0;
1020
520eb820
KV		 1021 del_timer_sync(&local->dynamic_ps_timer);
1022 cancel_work_sync(&local->dynamic_ps_enable_work);
1023
e0cb686f
KV		 1024 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1025 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1026 config_changed |= IEEE80211_CONF_CHANGE_PS;
1027 }
ae5eb026 1028
e0cb686f 1029 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1030
1031 /* And the BSSID changed -- not very interesting here */
1032 changed |= BSS_CHANGED_BSSID;
ae5eb026 1033 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1034
1035 rcu_read_lock();
1036
77fdaa12 1037 sta = sta_info_get(local, bssid);
8e268e47
TW		 1038 if (!sta) {
1039 rcu_read_unlock();
1040 return;
1041 }
1042
1043 sta_info_unlink(&sta);
1044
1045 rcu_read_unlock();
1046
1047 sta_info_destroy(sta);
aa458d17 1048}
f0706e82 1049
77fdaa12
JB		 1050static enum rx_mgmt_action __must_check
1051ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1052 struct ieee80211_mgd_work *wk)
f0706e82 1053{
46900298 1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1055 struct ieee80211_local *local = sdata->local;
46900298 1056
77fdaa12
JB		 1057 wk->tries++;
1058 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1059 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1060 " timed out\n",
77fdaa12
JB		 1061 sdata->dev->name, wk->bss->cbss.bssid);
1062
1063 /*
1064 * Most likely AP is not in the range so remove the
1065 * bss struct for that AP.
1066 */
1067 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1068
11432379
HS		 1069 /*
1070 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1071 * due to work needing to be done. Hence, queue the STAs work
1072 * again for that.
11432379
HS		 1073 */
1074 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 1075 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1076 }
1077
77fdaa12
JB		 1078 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1079 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1080 ieee80211_send_assoc(sdata, wk);
1081
1082 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1083 mod_timer(&ifmgd->timer, wk->timeout);
f0706e82 1084
77fdaa12 1085 return RX_MGMT_NONE;
f0706e82
JB		 1086}
1087
3cf335d5
KV		 1088void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1089 struct ieee80211_hdr *hdr)
1090{
1091 /*
1092 * We can postpone the mgd.timer whenever receiving unicast frames
1093 * from AP because we know that the connection is working both ways
1094 * at that time. But multicast frames (and hence also beacons) must
1095 * be ignored here, because we need to trigger the timer during
1096 * data idle periods for sending the periodical probe request to
1097 * the AP.
1098 */
1099 if (!is_multicast_ether_addr(hdr->addr1))
1100 mod_timer(&sdata->u.mgd.timer,
1101 jiffies + IEEE80211_MONITORING_INTERVAL);
1102}
f0706e82 1103
04de8381
KV		 1104void ieee80211_beacon_loss_work(struct work_struct *work)
1105{
1106 struct ieee80211_sub_if_data *sdata =
1107 container_of(work, struct ieee80211_sub_if_data,
1108 u.mgd.beacon_loss_work);
1109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1110 const u8 *ssid;
04de8381 1111
34bfc411
JB		 1112 /*
1113 * The driver has already reported this event and we have
1114 * already sent a probe request. Maybe the AP died and the
1115 * driver keeps reporting until we disassociate... We have
1116 * to ignore that because otherwise we would continually
1117 * reset the timer and never check whether we received a
1118 * probe response!
1119 */
1120 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1121 return;
1122
77fdaa12
JB		 1123 mutex_lock(&ifmgd->mtx);
1124
1125 if (!ifmgd->associated)
1126 goto out;
1127
a860402d 1128#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
77fdaa12
JB		 1129 if (net_ratelimit())
1130 printk(KERN_DEBUG "%s: driver reports beacon loss from AP "
1131 "- sending probe request\n", sdata->dev->name);
a860402d 1132#endif
04de8381
KV		 1133
1134 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1135
1136 mutex_lock(&sdata->local->iflist_mtx);
1137 ieee80211_recalc_ps(sdata->local, -1);
1138 mutex_unlock(&sdata->local->iflist_mtx);
1139
77fdaa12
JB		 1140 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1141 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1142 ssid + 2, ssid[1], NULL, 0);
04de8381 1143
e0502de6 1144 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
77fdaa12
JB		 1145 out:
1146 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1147}
1148
1149void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1150{
1151 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1152
1153 queue_work(sdata->local->hw.workqueue,
1154 &sdata->u.mgd.beacon_loss_work);
1155}
1156EXPORT_SYMBOL(ieee80211_beacon_loss);
1157
77fdaa12
JB		 1158static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1159 struct ieee80211_mgd_work *wk)
f0706e82 1160{
77fdaa12 1161 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1162 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1163}
1164
1165
f698d856 1166static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1167 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1168 struct ieee80211_mgmt *mgmt,
1169 size_t len)
1170{
1171 u8 *pos;
1172 struct ieee802_11_elems elems;
1173
f0706e82 1174 pos = mgmt->u.auth.variable;
67a4cce4 1175 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1176 if (!elems.challenge)
f0706e82 1177 return;
77fdaa12 1178 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1179 elems.challenge - 2, elems.challenge_len + 2,
77fdaa12
JB		 1180 wk->bss->cbss.bssid, 1);
1181 wk->auth_transaction = 4;
fe3d2c3f
JB		 1182}
1183
77fdaa12
JB		 1184static enum rx_mgmt_action __must_check
1185ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1186 struct ieee80211_mgd_work *wk,
1187 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1188{
f0706e82
JB		 1189 u16 auth_alg, auth_transaction, status_code;
1190
77fdaa12
JB		 1191 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1192 return RX_MGMT_NONE;
f0706e82 1193
f4ea83dd 1194 if (len < 24 + 6)
77fdaa12 1195 return RX_MGMT_NONE;
f0706e82 1196
77fdaa12
JB		 1197 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1198 return RX_MGMT_NONE;
f0706e82 1199
77fdaa12
JB		 1200 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1201 return RX_MGMT_NONE;
f0706e82
JB		 1202
1203 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1204 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1205 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1206
77fdaa12
JB		 1207 if (auth_alg != wk->auth_alg ||
1208 auth_transaction != wk->auth_transaction)
1209 return RX_MGMT_NONE;
f0706e82
JB		 1210
1211 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1212 list_del(&wk->list);
1213 kfree(wk);
1214 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1215 }
1216
77fdaa12 1217 switch (wk->auth_alg) {
f0706e82
JB		 1218 case WLAN_AUTH_OPEN:
1219 case WLAN_AUTH_LEAP:
636a5d36 1220 case WLAN_AUTH_FT:
77fdaa12
JB		 1221 ieee80211_auth_completed(sdata, wk);
1222 return RX_MGMT_CFG80211_AUTH;
f0706e82 1223 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1224 if (wk->auth_transaction == 4) {
1225 ieee80211_auth_completed(sdata, wk);
1226 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1227 } else
77fdaa12 1228 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1229 break;
1230 }
77fdaa12
JB		 1231
1232 return RX_MGMT_NONE;
f0706e82
JB		 1233}
1234
1235
77fdaa12
JB		 1236static enum rx_mgmt_action __must_check
1237ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1238 struct ieee80211_mgd_work *wk,
1239 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1240{
46900298 1241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1242 const u8 *bssid = NULL;
f0706e82
JB		 1243 u16 reason_code;
1244
f4ea83dd 1245 if (len < 24 + 2)
77fdaa12 1246 return RX_MGMT_NONE;
f0706e82 1247
77fdaa12
JB		 1248 ASSERT_MGD_MTX(ifmgd);
1249
1250 if (wk)
1251 bssid = wk->bss->cbss.bssid;
1252 else
1253 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1254
1255 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1256
77fdaa12
JB		 1257 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1258 sdata->dev->name, bssid, reason_code);
1259
1260 if (!wk) {
1261 ieee80211_set_disassoc(sdata, bssid, true);
1262 } else {
1263 list_del(&wk->list);
1264 kfree(wk);
1265 }
f0706e82 1266
77fdaa12 1267 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1268}
1269
1270
77fdaa12
JB		 1271static enum rx_mgmt_action __must_check
1272ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1273 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1274{
46900298 1275 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1276 u16 reason_code;
1277
f4ea83dd 1278 if (len < 24 + 2)
77fdaa12 1279 return RX_MGMT_NONE;
f0706e82 1280
77fdaa12
JB		 1281 ASSERT_MGD_MTX(ifmgd);
1282
1283 if (WARN_ON(!ifmgd->associated))
1284 return RX_MGMT_NONE;
1285
1286 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1287 return RX_MGMT_NONE;
f0706e82
JB		 1288
1289 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1290
77fdaa12
JB		 1291 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1292 sdata->dev->name, reason_code);
f0706e82 1293
77fdaa12
JB		 1294 ieee80211_set_disassoc(sdata, ifmgd->associated->cbss.bssid, false);
1295 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1296}
1297
1298
77fdaa12
JB		 1299static enum rx_mgmt_action __must_check
1300ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1301 struct ieee80211_mgd_work *wk,
1302 struct ieee80211_mgmt *mgmt, size_t len,
1303 bool reassoc)
f0706e82 1304{
46900298 1305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1306 struct ieee80211_local *local = sdata->local;
8318d78a 1307 struct ieee80211_supported_band *sband;
f0706e82 1308 struct sta_info *sta;
881d948c 1309 u32 rates, basic_rates;
f0706e82
JB		 1310 u16 capab_info, status_code, aid;
1311 struct ieee802_11_elems elems;
bda3933a 1312 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1313 u8 *pos;
ae5eb026 1314 u32 changed = 0;
f0706e82 1315 int i, j;
ddf4ac53 1316 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1317 u16 ap_ht_cap_flags;
f0706e82 1318
77fdaa12
JB		 1319 /*
1320 * AssocResp and ReassocResp have identical structure, so process both
1321 * of them in this function.
1322 */
f0706e82 1323
f4ea83dd 1324 if (len < 24 + 6)
77fdaa12 1325 return RX_MGMT_NONE;
f0706e82 1326
77fdaa12
JB		 1327 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1328 return RX_MGMT_NONE;
f0706e82
JB		 1329
1330 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1331 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1332 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1333
0c68ae26 1334 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1335 "status=%d aid=%d)\n",
0c68ae26 1336 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1337 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1338
63a5ab82
JM		 1339 pos = mgmt->u.assoc_resp.variable;
1340 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1341
1342 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1343 elems.timeout_int && elems.timeout_int_len == 5 &&
1344 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1345 u32 tu, ms;
f797eb7e 1346 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1347 ms = tu * 1024 / 1000;
1348 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1349 "comeback duration %u TU (%u ms)\n",
1350 sdata->dev->name, tu, ms);
77fdaa12 1351 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1352 if (ms > IEEE80211_ASSOC_TIMEOUT)
46900298 1353 mod_timer(&ifmgd->timer,
63a5ab82 1354 jiffies + msecs_to_jiffies(ms));
77fdaa12 1355 return RX_MGMT_NONE;
63a5ab82
JM		 1356 }
1357
f0706e82
JB		 1358 if (status_code != WLAN_STATUS_SUCCESS) {
1359 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1360 sdata->dev->name, status_code);
77fdaa12
JB		 1361 list_del(&wk->list);
1362 kfree(wk);
1363 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1364 }
1365
1dd84aa2
JB		 1366 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1367 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1368 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1369 aid &= ~(BIT(15) | BIT(14));
1370
f0706e82
JB		 1371 if (!elems.supp_rates) {
1372 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1373 sdata->dev->name);
77fdaa12 1374 return RX_MGMT_NONE;
f0706e82
JB		 1375 }
1376
f698d856 1377 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1378 ifmgd->aid = aid;
f0706e82 1379
d0709a65
JB		 1380 rcu_read_lock();
1381
f0706e82 1382 /* Add STA entry for the AP */
77fdaa12 1383 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1384 if (!sta) {
ddf4ac53 1385 newsta = true;
d0709a65 1386
77fdaa12
JB		 1387 rcu_read_unlock();
1388
1389 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1390 if (!sta) {
1391 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1392 " the AP\n", sdata->dev->name);
77fdaa12 1393 return RX_MGMT_NONE;
f0706e82 1394 }
f709fc69 1395
60f8b39c
JB		 1396 /* update new sta with its last rx activity */
1397 sta->last_rx = jiffies;
f709fc69 1398
77fdaa12
JB		 1399 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1400 WLAN_STA_ASSOC_AP);
1401 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1402 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1403
77fdaa12
JB		 1404 rcu_read_lock();
1405 }
05e5e883 1406
60f8b39c
JB		 1407 rates = 0;
1408 basic_rates = 0;
1409 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1410
60f8b39c
JB		 1411 for (i = 0; i < elems.supp_rates_len; i++) {
1412 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1413 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1414
60f8b39c
JB		 1415 if (rate > 110)
1416 have_higher_than_11mbit = true;
1417
1418 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1419 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1420 rates |= BIT(j);
d61272cb
TW		 1421 if (is_basic)
1422 basic_rates |= BIT(j);
1423 break;
1424 }
f709fc69 1425 }
f709fc69
LCC		 1426 }
1427
60f8b39c
JB		 1428 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1429 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1430 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1431
60f8b39c
JB		 1432 if (rate > 110)
1433 have_higher_than_11mbit = true;
f0706e82 1434
60f8b39c 1435 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1436 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1437 rates |= BIT(j);
d61272cb
TW		 1438 if (is_basic)
1439 basic_rates |= BIT(j);
1440 break;
1441 }
60f8b39c 1442 }
1ebebea8 1443 }
f0706e82 1444
323ce79a 1445 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1446 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1447
1448 /* cf. IEEE 802.11 9.2.12 */
1449 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1450 have_higher_than_11mbit)
1451 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1452 else
1453 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1454
ab1faead 1455 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1456 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1457 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1458
1459 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1460
4b7679a5 1461 rate_control_rate_init(sta);
f0706e82 1462
46900298 1463 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1464 set_sta_flags(sta, WLAN_STA_MFP);
1465
ddf4ac53 1466 if (elems.wmm_param)
60f8b39c 1467 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1468
1469 if (newsta) {
1470 int err = sta_info_insert(sta);
1471 if (err) {
1472 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1473 " the AP (error %d)\n", sdata->dev->name, err);
1474 rcu_read_unlock();
77fdaa12 1475 return RX_MGMT_NONE;
ddf4ac53
JB		 1476 }
1477 }
1478
1479 rcu_read_unlock();
1480
1481 if (elems.wmm_param)
46900298 1482 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1483 elems.wmm_param_len);
aa837e1d
JB		 1484 else
1485 ieee80211_set_wmm_default(sdata);
f0706e82 1486
ae5eb026 1487 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1488 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1489 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1490 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1491 wk->bss->cbss.bssid,
ae5eb026
JB		 1492 ap_ht_cap_flags);
1493
60f8b39c
JB		 1494 /* set AID and assoc capability,
1495 * ieee80211_set_associated() will tell the driver */
1496 bss_conf->aid = aid;
1497 bss_conf->assoc_capability = capab_info;
77fdaa12 1498 ieee80211_set_associated(sdata, wk->bss, changed);
f0706e82 1499
15b7b062
KV		 1500 /*
1501 * initialise the time of last beacon to be the association time,
1502 * otherwise beacon loss check will trigger immediately
1503 */
1504 ifmgd->last_beacon = jiffies;
1505
77fdaa12
JB		 1506 list_del(&wk->list);
1507 kfree(wk);
1508 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1509}
1510
1511
98c8fccf
JB		 1512static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1513 struct ieee80211_mgmt *mgmt,
1514 size_t len,
1515 struct ieee80211_rx_status *rx_status,
1516 struct ieee802_11_elems *elems,
1517 bool beacon)
1518{
1519 struct ieee80211_local *local = sdata->local;
1520 int freq;
c2b13452 1521 struct ieee80211_bss *bss;
98c8fccf 1522 struct ieee80211_channel *channel;
98c8fccf
JB		 1523
1524 if (elems->ds_params && elems->ds_params_len == 1)
1525 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1526 else
1527 freq = rx_status->freq;
1528
1529 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1530
1531 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1532 return;
1533
98c8fccf 1534 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1535 channel, beacon);
77fdaa12
JB		 1536 if (bss)
1537 ieee80211_rx_bss_put(local, bss);
1538
1539 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1540 return;
1541
c481ec97 1542 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1543 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1544 ETH_ALEN) == 0)) {
c481ec97
S		 1545 struct ieee80211_channel_sw_ie *sw_elem =
1546 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1547 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1548 }
f0706e82
JB		 1549}
1550
1551
f698d856 1552static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1553 struct ieee80211_mgd_work *wk,
1554 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1555 struct ieee80211_rx_status *rx_status)
1556{
15b7b062 1557 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1558 size_t baselen;
1559 struct ieee802_11_elems elems;
1560
15b7b062
KV		 1561 ifmgd = &sdata->u.mgd;
1562
77fdaa12
JB		 1563 ASSERT_MGD_MTX(ifmgd);
1564
8e7cdbb6
TW		 1565 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1566 return; /* ignore ProbeResp to foreign address */
1567
ae6a44e3
EK		 1568 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1569 if (baselen > len)
1570 return;
1571
1572 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1573 &elems);
1574
98c8fccf 1575 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1576
1577 /* direct probe may be part of the association flow */
77fdaa12 1578 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1579 printk(KERN_DEBUG "%s direct probe responded\n",
1580 sdata->dev->name);
77fdaa12
JB		 1581 wk->tries = 0;
1582 wk->state = IEEE80211_MGD_STATE_AUTH;
1583 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1584 }
15b7b062 1585
77fdaa12
JB		 1586 if (ifmgd->associated &&
1587 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1588 ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
15b7b062 1589 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1590 mutex_lock(&sdata->local->iflist_mtx);
1591 ieee80211_recalc_ps(sdata->local, -1);
1592 mutex_unlock(&sdata->local->iflist_mtx);
1593 }
f0706e82
JB		 1594}
1595
d91f36db
JB		 1596/*
1597 * This is the canonical list of information elements we care about,
1598 * the filter code also gives us all changes to the Microsoft OUI
1599 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1600 *
1601 * We implement beacon filtering in software since that means we can
1602 * avoid processing the frame here and in cfg80211, and userspace
1603 * will not be able to tell whether the hardware supports it or not.
1604 *
1605 * XXX: This list needs to be dynamic -- userspace needs to be able to
1606 * add items it requires. It also needs to be able to tell us to
1607 * look out for other vendor IEs.
1608 */
1609static const u64 care_about_ies =
1d4df3a5
JB		 1610 (1ULL << WLAN_EID_COUNTRY) |
1611 (1ULL << WLAN_EID_ERP_INFO) |
1612 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1613 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1614 (1ULL << WLAN_EID_HT_CAPABILITY) |
1615 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1616
f698d856 1617static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1618 struct ieee80211_mgmt *mgmt,
1619 size_t len,
1620 struct ieee80211_rx_status *rx_status)
1621{
d91f36db 1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1623 size_t baselen;
1624 struct ieee802_11_elems elems;
f698d856 1625 struct ieee80211_local *local = sdata->local;
471b3efd 1626 u32 changed = 0;
d91f36db 1627 bool erp_valid, directed_tim = false;
7a5158ef 1628 u8 erp_value = 0;
d91f36db 1629 u32 ncrc;
77fdaa12
JB		 1630 u8 *bssid;
1631
1632 ASSERT_MGD_MTX(ifmgd);
f0706e82 1633
ae6a44e3
EK		 1634 /* Process beacon from the current BSS */
1635 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1636 if (baselen > len)
1637 return;
1638
d91f36db 1639 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1640 return;
f0706e82 1641
77fdaa12
JB		 1642 if (WARN_ON(!ifmgd->associated))
1643 return;
1644
1645 bssid = ifmgd->associated->cbss.bssid;
1646
1647 if (WARN_ON(memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0))
f0706e82
JB		 1648 return;
1649
92778180
JM		 1650 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1651#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1652 if (net_ratelimit()) {
1653 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1654 "to a received beacon\n", sdata->dev->name);
1655 }
1656#endif
1657 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1658 mutex_lock(&local->iflist_mtx);
1659 ieee80211_recalc_ps(local, -1);
1660 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1661 }
1662
d91f36db
JB		 1663 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1664 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1665 len - baselen, &elems,
1666 care_about_ies, ncrc);
1667
1668 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1669 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1670 ifmgd->aid);
d91f36db 1671
30196673
JM		 1672 if (ncrc != ifmgd->beacon_crc) {
1673 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1674 true);
d91f36db 1675
30196673
JM		 1676 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1677 elems.wmm_param_len);
1678 }
fe3fa827 1679
25c9c875 1680 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1681 if (directed_tim) {
572e0012
KV		 1682 if (local->hw.conf.dynamic_ps_timeout > 0) {
1683 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1684 ieee80211_hw_config(local,
1685 IEEE80211_CONF_CHANGE_PS);
1686 ieee80211_send_nullfunc(local, sdata, 0);
1687 } else {
1688 local->pspolling = true;
1689
1690 /*
1691 * Here is assumed that the driver will be
1692 * able to send ps-poll frame and receive a
1693 * response even though power save mode is
1694 * enabled, but some drivers might require
1695 * to disable power save here. This needs
1696 * to be investigated.
1697 */
1698 ieee80211_send_pspoll(local, sdata);
1699 }
a97b77b9
VN		 1700 }
1701 }
7a5158ef 1702
30196673
JM		 1703 if (ncrc == ifmgd->beacon_crc)
1704 return;
1705 ifmgd->beacon_crc = ncrc;
1706
7a5158ef
JB		 1707 if (elems.erp_info && elems.erp_info_len >= 1) {
1708 erp_valid = true;
1709 erp_value = elems.erp_info[0];
1710 } else {
1711 erp_valid = false;
50c4afb9 1712 }
7a5158ef
JB		 1713 changed |= ieee80211_handle_bss_capability(sdata,
1714 le16_to_cpu(mgmt->u.beacon.capab_info),
1715 erp_valid, erp_value);
f0706e82 1716
d3c990fb 1717
53d6f81c 1718 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1719 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1720 struct sta_info *sta;
1721 struct ieee80211_supported_band *sband;
1722 u16 ap_ht_cap_flags;
1723
1724 rcu_read_lock();
1725
77fdaa12
JB		 1726 sta = sta_info_get(local, bssid);
1727 if (WARN_ON(!sta)) {
ae5eb026
JB		 1728 rcu_read_unlock();
1729 return;
1730 }
1731
1732 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1733
1734 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1735 elems.ht_cap_elem, &sta->sta.ht_cap);
1736
1737 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1738
1739 rcu_read_unlock();
1740
1741 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1742 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1743 }
1744
3f2355cb
LR		 1745 if (elems.country_elem) {
1746 /* Note we are only reviewing this on beacons
1747 * for the BSSID we are associated to */
1748 regulatory_hint_11d(local->hw.wiphy,
1749 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1750
1751 /* TODO: IBSS also needs this */
1752 if (elems.pwr_constr_elem)
1753 ieee80211_handle_pwr_constr(sdata,
1754 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1755 elems.pwr_constr_elem,
1756 elems.pwr_constr_elem_len);
3f2355cb
LR		 1757 }
1758
471b3efd 1759 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1760}
1761
46900298 1762ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1763 struct sk_buff *skb)
f0706e82 1764{
f698d856 1765 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1766 struct ieee80211_mgmt *mgmt;
1767 u16 fc;
1768
1769 if (skb->len < 24)
46900298 1770 return RX_DROP_MONITOR;
f0706e82
JB		 1771
1772 mgmt = (struct ieee80211_mgmt *) skb->data;
1773 fc = le16_to_cpu(mgmt->frame_control);
1774
1775 switch (fc & IEEE80211_FCTL_STYPE) {
1776 case IEEE80211_STYPE_PROBE_REQ:
1777 case IEEE80211_STYPE_PROBE_RESP:
1778 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1779 case IEEE80211_STYPE_AUTH:
1780 case IEEE80211_STYPE_ASSOC_RESP:
1781 case IEEE80211_STYPE_REASSOC_RESP:
1782 case IEEE80211_STYPE_DEAUTH:
1783 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1784 case IEEE80211_STYPE_ACTION:
46900298
JB		 1785 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1786 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1787 return RX_QUEUED;
f0706e82
JB		 1788 }
1789
46900298 1790 return RX_DROP_MONITOR;
f0706e82
JB		 1791}
1792
f698d856 1793static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1794 struct sk_buff *skb)
1795{
77fdaa12 1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1797 struct ieee80211_rx_status *rx_status;
f0706e82 1798 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1799 struct ieee80211_mgd_work *wk;
1800 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1801 u16 fc;
1802
f0706e82
JB		 1803 rx_status = (struct ieee80211_rx_status *) skb->cb;
1804 mgmt = (struct ieee80211_mgmt *) skb->data;
1805 fc = le16_to_cpu(mgmt->frame_control);
1806
77fdaa12
JB		 1807 mutex_lock(&ifmgd->mtx);
1808
1809 if (ifmgd->associated &&
1810 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1811 ETH_ALEN) == 0) {
1812 switch (fc & IEEE80211_FCTL_STYPE) {
1813 case IEEE80211_STYPE_BEACON:
1814 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1815 rx_status);
1816 break;
1817 case IEEE80211_STYPE_PROBE_RESP:
1818 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1819 skb->len, rx_status);
1820 break;
1821 case IEEE80211_STYPE_DEAUTH:
1822 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1823 mgmt, skb->len);
1824 break;
1825 case IEEE80211_STYPE_DISASSOC:
1826 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1827 break;
1828 case IEEE80211_STYPE_ACTION:
1829 /* XXX: differentiate, can only happen for CSA now! */
1830 ieee80211_sta_process_chanswitch(sdata,
1831 &mgmt->u.action.u.chan_switch.sw_elem,
1832 ifmgd->associated);
1833 break;
1834 }
1835 mutex_unlock(&ifmgd->mtx);
1836
1837 switch (rma) {
1838 case RX_MGMT_NONE:
1839 /* no action */
1840 break;
1841 case RX_MGMT_CFG80211_DEAUTH:
1842 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt,
1843 skb->len, GFP_KERNEL);
1844 break;
1845 case RX_MGMT_CFG80211_DISASSOC:
1846 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt,
1847 skb->len, GFP_KERNEL);
1848 break;
1849 default:
1850 WARN(1, "unexpected: %d", rma);
1851 }
1852 goto out;
1853 }
1854
1855 list_for_each_entry(wk, &ifmgd->work_list, list) {
1856 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1857 continue;
1858
1859 switch (fc & IEEE80211_FCTL_STYPE) {
1860 case IEEE80211_STYPE_PROBE_RESP:
1861 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1862 rx_status);
1863 break;
1864 case IEEE80211_STYPE_AUTH:
1865 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1866 break;
1867 case IEEE80211_STYPE_ASSOC_RESP:
1868 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1869 skb->len, false);
1870 break;
1871 case IEEE80211_STYPE_REASSOC_RESP:
1872 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1873 skb->len, true);
1874 break;
1875 case IEEE80211_STYPE_DEAUTH:
1876 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1877 skb->len);
1878 break;
1879 }
1880 /*
1881 * We've processed this frame for that work, so it can't
1882 * belong to another work struct.
1883 * NB: this is also required for correctness because the
1884 * called functions can free 'wk', and for 'rma'!
1885 */
46900298 1886 break;
77fdaa12
JB		 1887 }
1888
1889 mutex_unlock(&ifmgd->mtx);
1890
1891 switch (rma) {
1892 case RX_MGMT_NONE:
1893 /* no action */
46900298 1894 break;
77fdaa12
JB		 1895 case RX_MGMT_CFG80211_AUTH:
1896 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len,
1897 GFP_KERNEL);
46900298 1898 break;
77fdaa12
JB		 1899 case RX_MGMT_CFG80211_ASSOC:
1900 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len,
1901 GFP_KERNEL);
46900298 1902 break;
77fdaa12
JB		 1903 default:
1904 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 1905 }
1906
77fdaa12 1907 out:
f0706e82
JB		 1908 kfree_skb(skb);
1909}
1910
9c6bd790 1911static void ieee80211_sta_timer(unsigned long data)
f0706e82 1912{
60f8b39c
JB		 1913 struct ieee80211_sub_if_data *sdata =
1914 (struct ieee80211_sub_if_data *) data;
46900298 1915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1916 struct ieee80211_local *local = sdata->local;
f0706e82 1917
5bb644a0
JB		 1918 if (local->quiescing) {
1919 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1920 return;
1921 }
1922
46900298 1923 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1924}
1925
9c6bd790
JB		 1926static void ieee80211_sta_work(struct work_struct *work)
1927{
1928 struct ieee80211_sub_if_data *sdata =
46900298 1929 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1930 struct ieee80211_local *local = sdata->local;
46900298 1931 struct ieee80211_if_managed *ifmgd;
9c6bd790 1932 struct sk_buff *skb;
77fdaa12
JB		 1933 struct ieee80211_mgd_work *wk, *tmp;
1934 LIST_HEAD(free_work);
1935 enum rx_mgmt_action rma;
1936 bool anybusy = false;
9c6bd790
JB		 1937
1938 if (!netif_running(sdata->dev))
1939 return;
1940
c2b13452 1941 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 1942 return;
1943
46900298 1944 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1945 return;
5bb644a0
JB		 1946
1947 /*
1948 * Nothing should have been stuffed into the workqueue during
1949 * the suspend->resume cycle. If this WARN is seen then there
1950 * is a bug with either the driver suspend or something in
1951 * mac80211 stuffing into the workqueue which we haven't yet
1952 * cleared during mac80211's suspend cycle.
1953 */
1954 if (WARN_ON(local->suspended))
1955 return;
1956
46900298 1957 ifmgd = &sdata->u.mgd;
f0706e82 1958
77fdaa12 1959 /* first process frames to avoid timing out while a frame is pending */
46900298 1960 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 1961 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1962
77fdaa12
JB		 1963 /* then process the rest of the work */
1964 mutex_lock(&ifmgd->mtx);
1965
1966 list_for_each_entry(wk, &ifmgd->work_list, list) {
1967 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
1968 anybusy = true;
1969 break;
1970 }
f0706e82
JB		 1971 }
1972
77fdaa12
JB		 1973 ieee80211_recalc_idle(local);
1974
1975 if (!anybusy) {
1976 mutex_unlock(&ifmgd->mtx);
1977
1978 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
1979 queue_delayed_work(local->hw.workqueue,
1980 &local->scan_work,
1981 round_jiffies_relative(0));
9c6bd790 1982 return;
77fdaa12 1983 }
d6f2da5b 1984
77fdaa12
JB		 1985 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
1986 if (time_before(jiffies, wk->timeout))
1987 continue;
5cff20e6 1988
77fdaa12
JB		 1989 switch (wk->state) {
1990 default:
1991 WARN_ON(1);
1992 /* fall through */
1993 case IEEE80211_MGD_STATE_IDLE:
1994 /* nothing */
1995 rma = RX_MGMT_NONE;
1996 break;
1997 case IEEE80211_MGD_STATE_PROBE:
1998 rma = ieee80211_direct_probe(sdata, wk);
1999 break;
2000 case IEEE80211_MGD_STATE_AUTH:
2001 rma = ieee80211_authenticate(sdata, wk);
2002 break;
2003 case IEEE80211_MGD_STATE_ASSOC:
2004 rma = ieee80211_associate(sdata, wk);
2005 break;
2006 }
2007
2008 switch (rma) {
2009 case RX_MGMT_NONE:
2010 /* no action required */
2011 break;
2012 case RX_MGMT_CFG80211_AUTH_TO:
2013 case RX_MGMT_CFG80211_ASSOC_TO:
2014 list_del(&wk->list);
2015 list_add(&wk->list, &free_work);
2016 wk->tries = rma; /* small abuse but only local */
2017 break;
2018 default:
2019 WARN(1, "unexpected: %d", rma);
2020 }
2021 }
2022
2023 mutex_unlock(&ifmgd->mtx);
2024
2025 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2026 switch (wk->tries) {
2027 case RX_MGMT_CFG80211_AUTH_TO:
2028 cfg80211_send_auth_timeout(sdata->dev,
2029 wk->bss->cbss.bssid,
2030 GFP_KERNEL);
2031 break;
2032 case RX_MGMT_CFG80211_ASSOC_TO:
2033 cfg80211_send_auth_timeout(sdata->dev,
2034 wk->bss->cbss.bssid,
2035 GFP_KERNEL);
2036 break;
2037 default:
2038 WARN(1, "unexpected: %d", wk->tries);
2039 }
2040
2041 list_del(&wk->list);
2042 kfree(wk);
9c6bd790 2043 }
77fdaa12
JB		 2044
2045 ieee80211_recalc_idle(local);
f0706e82
JB		 2046}
2047
9c6bd790
JB		 2048static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2049{
ad935687
KV		 2050 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2051 /*
2052 * Need to update last_beacon to avoid beacon loss
2053 * test to trigger.
2054 */
2055 sdata->u.mgd.last_beacon = jiffies;
2056
9c6bd790 2057 queue_work(sdata->local->hw.workqueue,
46900298 2058 &sdata->u.mgd.work);
ad935687 2059 }
9c6bd790 2060}
f0706e82 2061
5bb644a0
JB		 2062#ifdef CONFIG_PM
2063void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2064{
2065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2066
2067 /*
2068 * we need to use atomic bitops for the running bits
2069 * only because both timers might fire at the same
2070 * time -- the code here is properly synchronised.
2071 */
2072
2073 cancel_work_sync(&ifmgd->work);
2074 cancel_work_sync(&ifmgd->beacon_loss_work);
2075 if (del_timer_sync(&ifmgd->timer))
2076 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2077
2078 cancel_work_sync(&ifmgd->chswitch_work);
2079 if (del_timer_sync(&ifmgd->chswitch_timer))
2080 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2081}
2082
2083void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2084{
2085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2086
2087 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2088 add_timer(&ifmgd->timer);
2089 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2090 add_timer(&ifmgd->chswitch_timer);
2091}
2092#endif
2093
9c6bd790
JB		 2094/* interface setup */
2095void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2096{
46900298 2097 struct ieee80211_if_managed *ifmgd;
988c0f72 2098
46900298
JB		 2099 ifmgd = &sdata->u.mgd;
2100 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2101 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2102 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2103 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2104 (unsigned long) sdata);
46900298 2105 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2106 (unsigned long) sdata);
46900298 2107 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2108
77fdaa12
JB		 2109 INIT_LIST_HEAD(&ifmgd->work_list);
2110
46900298 2111 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2112 ifmgd->flags = 0;
176be728 2113 if (sdata->local->hw.queues >= 4)
46900298 2114 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2115
77fdaa12 2116 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2117}
2118
77fdaa12
JB		 2119/* scan finished notification */
2120void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2121{
77fdaa12 2122 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2123
77fdaa12
JB		 2124 /* Restart STA timers */
2125 rcu_read_lock();
2126 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2127 ieee80211_restart_sta_timer(sdata);
2128 rcu_read_unlock();
2129}
60f8b39c 2130
77fdaa12
JB		 2131int ieee80211_max_network_latency(struct notifier_block *nb,
2132 unsigned long data, void *dummy)
2133{
2134 s32 latency_usec = (s32) data;
2135 struct ieee80211_local *local =
2136 container_of(nb, struct ieee80211_local,
2137 network_latency_notifier);
1fa6f4af 2138
77fdaa12
JB		 2139 mutex_lock(&local->iflist_mtx);
2140 ieee80211_recalc_ps(local, latency_usec);
2141 mutex_unlock(&local->iflist_mtx);
dfe67012 2142
77fdaa12 2143 return 0;
9c6bd790
JB		 2144}
2145
77fdaa12
JB		 2146/* config hooks */
2147int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2148 struct cfg80211_auth_request *req)
9c6bd790 2149{
46900298 2150 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2151 const u8 *ssid;
2152 struct ieee80211_mgd_work *wk;
2153 u16 auth_alg;
9c6bd790 2154
77fdaa12
JB		 2155 switch (req->auth_type) {
2156 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2157 auth_alg = WLAN_AUTH_OPEN;
2158 break;
2159 case NL80211_AUTHTYPE_SHARED_KEY:
2160 auth_alg = WLAN_AUTH_SHARED_KEY;
2161 break;
2162 case NL80211_AUTHTYPE_FT:
2163 auth_alg = WLAN_AUTH_FT;
2164 break;
2165 case NL80211_AUTHTYPE_NETWORK_EAP:
2166 auth_alg = WLAN_AUTH_LEAP;
2167 break;
2168 default:
2169 return -EOPNOTSUPP;
60f8b39c 2170 }
77fdaa12
JB		 2171
2172 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2173 if (!wk)
9c6bd790 2174 return -ENOMEM;
77fdaa12
JB		 2175
2176 wk->bss = (void *)req->bss;
2177
2178 if (req->ie && req->ie_len) {
2179 memcpy(wk->ie, req->ie, req->ie_len);
2180 wk->ie_len = req->ie_len;
9c6bd790 2181 }
77fdaa12
JB		 2182
2183 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2184 memcpy(wk->ssid, ssid + 2, ssid[1]);
2185 wk->ssid_len = ssid[1];
2186
2187 wk->state = IEEE80211_MGD_STATE_PROBE;
2188 wk->auth_alg = auth_alg;
2189
2190 /*
2191 * XXX: if still associated need to tell AP that we're going
2192 * to sleep and then change channel etc.
2193 */
2194 sdata->local->oper_channel = req->bss->channel;
2195 ieee80211_hw_config(sdata->local, 0);
2196
2197 mutex_lock(&ifmgd->mtx);
2198 list_add(&wk->list, &sdata->u.mgd.work_list);
2199 mutex_unlock(&ifmgd->mtx);
2200
2201 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
9c6bd790 2202 return 0;
60f8b39c
JB		 2203}
2204
77fdaa12
JB		 2205int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2206 struct cfg80211_assoc_request *req)
f0706e82 2207{
77fdaa12
JB		 2208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2209 struct ieee80211_mgd_work *wk, *found = NULL;
2210 int i, err;
f0706e82 2211
77fdaa12
JB		 2212 mutex_lock(&ifmgd->mtx);
2213
2214 list_for_each_entry(wk, &ifmgd->work_list, list) {
2215 if (&wk->bss->cbss == req->bss &&
2216 wk->state == IEEE80211_MGD_STATE_IDLE) {
2217 found = wk;
2218 break;
2219 }
2220 }
2221
2222 if (!found) {
2223 err = -ENOLINK;
2224 goto out;
2225 }
2226
2227 list_del(&found->list);
2228
2229 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2230 if (!wk) {
2231 list_add(&found->list, &ifmgd->work_list);
2232 err = -ENOMEM;
2233 goto out;
2234 }
2235
2236 list_add(&wk->list, &ifmgd->work_list);
2237
2238 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2239
2240 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2241 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2242 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2243 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2244 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2245
2246 sdata->local->oper_channel = req->bss->channel;
2247 ieee80211_hw_config(sdata->local, 0);
2248
2249 if (req->ie && req->ie_len) {
2250 memcpy(wk->ie, req->ie, req->ie_len);
2251 wk->ie_len = req->ie_len;
2252 } else
2253 wk->ie_len = 0;
2254
2255 if (req->prev_bssid)
2256 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2257
2258 wk->state = IEEE80211_MGD_STATE_ASSOC;
2259 wk->tries = 0;
2260
2261 if (req->use_mfp) {
2262 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2263 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2264 } else {
2265 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2266 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2267 }
2268
2269 if (req->crypto.control_port)
2270 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2271 else
2272 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2273
2274 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2275
2276 err = 0;
2277
2278 out:
2279 mutex_unlock(&ifmgd->mtx);
2280 return err;
f0706e82
JB		 2281}
2282
77fdaa12
JB		 2283int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
2284 struct cfg80211_deauth_request *req)
f0706e82 2285{
46900298 2286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2287 struct ieee80211_mgd_work *wk;
2288 const u8 *bssid = NULL;
f0706e82 2289
77fdaa12
JB		 2290 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2291 sdata->dev->name, req->reason_code);
2292
2293 mutex_lock(&ifmgd->mtx);
2294
2295 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2296 bssid = req->bss->bssid;
2297 ieee80211_set_disassoc(sdata, bssid, true);
2298 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2299 if (&wk->bss->cbss == req->bss) {
2300 bssid = req->bss->bssid;
2301 list_del(&wk->list);
2302 kfree(wk);
2303 break;
2304 }
2305 }
f0706e82 2306
77fdaa12
JB		 2307 /* cfg80211 should catch this... */
2308 if (WARN_ON(!bssid)) {
2309 mutex_unlock(&ifmgd->mtx);
46900298 2310 return -ENOLINK;
77fdaa12
JB		 2311 }
2312
2313 mutex_unlock(&ifmgd->mtx);
2314
2315 ieee80211_send_deauth_disassoc(sdata, bssid,
2316 IEEE80211_STYPE_DEAUTH, req->reason_code);
f0706e82 2317
f0706e82
JB		 2318 return 0;
2319}
84363e6e 2320
77fdaa12
JB		 2321int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
2322 struct cfg80211_disassoc_request *req)
9c6bd790 2323{
77fdaa12 2324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2325
77fdaa12
JB		 2326 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2327 sdata->dev->name, req->reason_code);
10f644a4 2328
77fdaa12 2329 mutex_lock(&ifmgd->mtx);
10f644a4 2330
77fdaa12
JB		 2331 /* cfg80211 should catch that */
2332 if (WARN_ON(&ifmgd->associated->cbss != req->bss)) {
2333 mutex_unlock(&ifmgd->mtx);
2334 return -ENOLINK;
2335 }
2336
2337 ieee80211_set_disassoc(sdata, req->bss->bssid, false);
2338
2339 mutex_unlock(&ifmgd->mtx);
10f644a4 2340
77fdaa12
JB		 2341 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
2342 IEEE80211_STYPE_DISASSOC, req->reason_code);
10f644a4
JB		 2343 return 0;
2344}
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