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nl80211: introduce new key attributes
[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,
667503dd
JB		 389 const u8 *bssid, u16 stype, u16 reason,
390 void *cookie)
9ac19a90
JB		 391{
392 struct ieee80211_local *local = sdata->local;
46900298 393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 394 struct sk_buff *skb;
395 struct ieee80211_mgmt *mgmt;
9aed3cc1 396
65fc73ac 397 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 398 if (!skb) {
ef422bc0
JB		 399 printk(KERN_DEBUG "%s: failed to allocate buffer for "
400 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 401 return;
402 }
403 skb_reserve(skb, local->hw.extra_tx_headroom);
404
405 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
406 memset(mgmt, 0, 24);
77fdaa12 407 memcpy(mgmt->da, bssid, ETH_ALEN);
9ac19a90 408 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 409 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 410 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 411 skb_put(skb, 2);
ef422bc0 412 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 413 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
414
53b46b84 415 if (stype == IEEE80211_STYPE_DEAUTH)
667503dd 416 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
53b46b84 417 else
667503dd 418 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
46900298 419 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 420}
421
572e0012
KV		 422void ieee80211_send_pspoll(struct ieee80211_local *local,
423 struct ieee80211_sub_if_data *sdata)
424{
46900298 425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 426 struct ieee80211_pspoll *pspoll;
427 struct sk_buff *skb;
428 u16 fc;
429
430 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
431 if (!skb) {
432 printk(KERN_DEBUG "%s: failed to allocate buffer for "
433 "pspoll frame\n", sdata->dev->name);
434 return;
435 }
436 skb_reserve(skb, local->hw.extra_tx_headroom);
437
438 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
439 memset(pspoll, 0, sizeof(*pspoll));
440 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
441 pspoll->frame_control = cpu_to_le16(fc);
46900298 442 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 443
444 /* aid in PS-Poll has its two MSBs each set to 1 */
445 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
446
46900298 447 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 448 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
449
450 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 451}
452
965bedad
JB		 453void ieee80211_send_nullfunc(struct ieee80211_local *local,
454 struct ieee80211_sub_if_data *sdata,
455 int powersave)
456{
457 struct sk_buff *skb;
458 struct ieee80211_hdr *nullfunc;
459 __le16 fc;
460
461 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
462 return;
463
464 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
465 if (!skb) {
466 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
467 "frame\n", sdata->dev->name);
468 return;
469 }
470 skb_reserve(skb, local->hw.extra_tx_headroom);
471
472 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
473 memset(nullfunc, 0, 24);
474 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
475 IEEE80211_FCTL_TODS);
476 if (powersave)
477 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
478 nullfunc->frame_control = fc;
479 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
480 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
481 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
482
483 ieee80211_tx_skb(sdata, skb, 0);
484}
485
cc32abd4
JB		 486/* spectrum management related things */
487static void ieee80211_chswitch_work(struct work_struct *work)
488{
489 struct ieee80211_sub_if_data *sdata =
490 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
492
493 if (!netif_running(sdata->dev))
494 return;
495
77fdaa12
JB		 496 mutex_lock(&ifmgd->mtx);
497 if (!ifmgd->associated)
498 goto out;
cc32abd4
JB		 499
500 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 501 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
502
cc32abd4 503 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 504 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 505
cc32abd4
JB		 506 ieee80211_wake_queues_by_reason(&sdata->local->hw,
507 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 508 out:
509 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
510 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 511}
512
513static void ieee80211_chswitch_timer(unsigned long data)
514{
515 struct ieee80211_sub_if_data *sdata =
516 (struct ieee80211_sub_if_data *) data;
517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
518
5bb644a0
JB		 519 if (sdata->local->quiescing) {
520 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
521 return;
522 }
523
cc32abd4
JB		 524 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
525}
526
527void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
528 struct ieee80211_channel_sw_ie *sw_elem,
529 struct ieee80211_bss *bss)
530{
531 struct ieee80211_channel *new_ch;
532 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
533 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
534
77fdaa12
JB		 535 ASSERT_MGD_MTX(ifmgd);
536
537 if (!ifmgd->associated)
cc32abd4
JB		 538 return;
539
540 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
541 return;
542
543 /* Disregard subsequent beacons if we are already running a timer
544 processing a CSA */
545
546 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
547 return;
548
549 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
550 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
551 return;
552
553 sdata->local->csa_channel = new_ch;
554
555 if (sw_elem->count <= 1) {
556 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
557 } else {
558 ieee80211_stop_queues_by_reason(&sdata->local->hw,
559 IEEE80211_QUEUE_STOP_REASON_CSA);
560 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
561 mod_timer(&ifmgd->chswitch_timer,
562 jiffies +
563 msecs_to_jiffies(sw_elem->count *
564 bss->cbss.beacon_interval));
565 }
566}
567
568static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
569 u16 capab_info, u8 *pwr_constr_elem,
570 u8 pwr_constr_elem_len)
571{
572 struct ieee80211_conf *conf = &sdata->local->hw.conf;
573
574 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
575 return;
576
577 /* Power constraint IE length should be 1 octet */
578 if (pwr_constr_elem_len != 1)
579 return;
580
581 if ((*pwr_constr_elem <= conf->channel->max_power) &&
582 (*pwr_constr_elem != sdata->local->power_constr_level)) {
583 sdata->local->power_constr_level = *pwr_constr_elem;
584 ieee80211_hw_config(sdata->local, 0);
585 }
586}
587
965bedad
JB		 588/* powersave */
589static void ieee80211_enable_ps(struct ieee80211_local *local,
590 struct ieee80211_sub_if_data *sdata)
591{
592 struct ieee80211_conf *conf = &local->hw.conf;
593
d5edaedc
JB		 594 /*
595 * If we are scanning right now then the parameters will
596 * take effect when scan finishes.
597 */
598 if (local->hw_scanning || local->sw_scanning)
599 return;
600
965bedad
JB		 601 if (conf->dynamic_ps_timeout > 0 &&
602 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
603 mod_timer(&local->dynamic_ps_timer, jiffies +
604 msecs_to_jiffies(conf->dynamic_ps_timeout));
605 } else {
606 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
607 ieee80211_send_nullfunc(local, sdata, 1);
608 conf->flags |= IEEE80211_CONF_PS;
609 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
610 }
611}
612
613static void ieee80211_change_ps(struct ieee80211_local *local)
614{
615 struct ieee80211_conf *conf = &local->hw.conf;
616
617 if (local->ps_sdata) {
965bedad
JB		 618 ieee80211_enable_ps(local, local->ps_sdata);
619 } else if (conf->flags & IEEE80211_CONF_PS) {
620 conf->flags &= ~IEEE80211_CONF_PS;
621 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
622 del_timer_sync(&local->dynamic_ps_timer);
623 cancel_work_sync(&local->dynamic_ps_enable_work);
624 }
625}
626
627/* need to hold RTNL or interface lock */
10f644a4 628void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 629{
630 struct ieee80211_sub_if_data *sdata, *found = NULL;
631 int count = 0;
632
633 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
634 local->ps_sdata = NULL;
635 return;
636 }
637
638 list_for_each_entry(sdata, &local->interfaces, list) {
639 if (!netif_running(sdata->dev))
640 continue;
641 if (sdata->vif.type != NL80211_IFTYPE_STATION)
642 continue;
643 found = sdata;
644 count++;
645 }
646
43f78531 647 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 648 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
4e751843 649 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
10f644a4
JB		 650 s32 beaconint_us;
651
652 if (latency < 0)
653 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
654
655 beaconint_us = ieee80211_tu_to_usec(
656 found->vif.bss_conf.beacon_int);
657
04fe2037 658 if (beaconint_us > latency) {
10f644a4 659 local->ps_sdata = NULL;
04fe2037
JB		 660 } else {
661 u8 dtimper = found->vif.bss_conf.dtim_period;
662 int maxslp = 1;
663
664 if (dtimper > 1)
665 maxslp = min_t(int, dtimper,
666 latency / beaconint_us);
667
9ccebe61 668 local->hw.conf.max_sleep_period = maxslp;
10f644a4 669 local->ps_sdata = found;
04fe2037 670 }
10f644a4 671 } else {
965bedad 672 local->ps_sdata = NULL;
10f644a4 673 }
965bedad
JB		 674
675 ieee80211_change_ps(local);
676}
677
678void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
679{
680 struct ieee80211_local *local =
681 container_of(work, struct ieee80211_local,
682 dynamic_ps_disable_work);
683
684 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
685 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
686 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
687 }
688
689 ieee80211_wake_queues_by_reason(&local->hw,
690 IEEE80211_QUEUE_STOP_REASON_PS);
691}
692
693void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
694{
695 struct ieee80211_local *local =
696 container_of(work, struct ieee80211_local,
697 dynamic_ps_enable_work);
698 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
699
700 /* can only happen when PS was just disabled anyway */
701 if (!sdata)
702 return;
703
704 if (local->hw.conf.flags & IEEE80211_CONF_PS)
705 return;
706
707 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
708 ieee80211_send_nullfunc(local, sdata, 1);
709
710 local->hw.conf.flags |= IEEE80211_CONF_PS;
711 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
712}
713
714void ieee80211_dynamic_ps_timer(unsigned long data)
715{
716 struct ieee80211_local *local = (void *) data;
717
5bb644a0
JB		 718 if (local->quiescing)
719 return;
720
965bedad
JB		 721 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
722}
723
60f8b39c 724/* MLME */
f698d856 725static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 726 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 727 u8 *wmm_param, size_t wmm_param_len)
728{
f0706e82
JB		 729 struct ieee80211_tx_queue_params params;
730 size_t left;
731 int count;
732 u8 *pos;
733
46900298 734 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 735 return;
736
737 if (!wmm_param)
738 return;
739
f0706e82
JB		 740 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
741 return;
742 count = wmm_param[6] & 0x0f;
46900298 743 if (count == ifmgd->wmm_last_param_set)
f0706e82 744 return;
46900298 745 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 746
747 pos = wmm_param + 8;
748 left = wmm_param_len - 8;
749
750 memset(&params, 0, sizeof(params));
751
f0706e82
JB		 752 local->wmm_acm = 0;
753 for (; left >= 4; left -= 4, pos += 4) {
754 int aci = (pos[0] >> 5) & 0x03;
755 int acm = (pos[0] >> 4) & 0x01;
756 int queue;
757
758 switch (aci) {
0eeb59fe 759 case 1: /* AC_BK */
e100bb64 760 queue = 3;
988c0f72 761 if (acm)
0eeb59fe 762 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 763 break;
0eeb59fe 764 case 2: /* AC_VI */
e100bb64 765 queue = 1;
988c0f72 766 if (acm)
0eeb59fe 767 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 768 break;
0eeb59fe 769 case 3: /* AC_VO */
e100bb64 770 queue = 0;
988c0f72 771 if (acm)
0eeb59fe 772 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 773 break;
0eeb59fe 774 case 0: /* AC_BE */
f0706e82 775 default:
e100bb64 776 queue = 2;
988c0f72 777 if (acm)
0eeb59fe 778 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 779 break;
780 }
781
782 params.aifs = pos[0] & 0x0f;
783 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
784 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 785 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 786#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 787 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 788 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 789 wiphy_name(local->hw.wiphy), queue, aci, acm,
790 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 791#endif
24487981 792 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 793 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 794 "parameters for queue %d\n",
795 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 796 }
797}
798
7a5158ef
JB		 799static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
800 u16 capab, bool erp_valid, u8 erp)
5628221c 801{
bda3933a 802 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 803 u32 changed = 0;
7a5158ef
JB		 804 bool use_protection;
805 bool use_short_preamble;
806 bool use_short_slot;
807
808 if (erp_valid) {
809 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
810 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
811 } else {
812 use_protection = false;
813 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
814 }
815
816 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 817
471b3efd 818 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 819 bss_conf->use_cts_prot = use_protection;
820 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 821 }
7e9ed188 822
d43c7b37 823 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 824 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 825 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 826 }
d9430a32 827
7a5158ef 828 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 829 bss_conf->use_short_slot = use_short_slot;
830 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 831 }
832
833 return changed;
834}
835
f698d856 836static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
77fdaa12 837 struct ieee80211_bss *bss,
ae5eb026 838 u32 bss_info_changed)
f0706e82 839{
471b3efd 840 struct ieee80211_local *local = sdata->local;
d6f2da5b 841
ae5eb026 842 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 843 /* set timing information */
844 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
845 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
846 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 847
77fdaa12
JB		 848 bss_info_changed |= BSS_CHANGED_BEACON_INT;
849 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
850 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 851
77fdaa12
JB		 852 sdata->u.mgd.associated = bss;
853 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 854
9ac19a90 855 ieee80211_led_assoc(local, 1);
9306102e 856
bda3933a 857 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 858 /*
859 * For now just always ask the driver to update the basic rateset
860 * when we have associated, we aren't checking whether it actually
861 * changed or not.
862 */
ae5eb026 863 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 864
865 /* And the BSSID changed - we're associated now */
866 bss_info_changed |= BSS_CHANGED_BSSID;
867
ae5eb026 868 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 869
965bedad 870 /* will be same as sdata */
04fe2037
JB		 871 if (local->ps_sdata) {
872 mutex_lock(&local->iflist_mtx);
873 ieee80211_recalc_ps(local, -1);
874 mutex_unlock(&local->iflist_mtx);
875 }
e0cb686f 876
9ac19a90
JB		 877 netif_tx_start_all_queues(sdata->dev);
878 netif_carrier_on(sdata->dev);
f0706e82
JB		 879}
880
77fdaa12
JB		 881static enum rx_mgmt_action __must_check
882ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
883 struct ieee80211_mgd_work *wk)
f0706e82 884{
46900298 885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 886 struct ieee80211_local *local = sdata->local;
46900298 887
77fdaa12
JB		 888 wk->tries++;
889 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 890 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 891 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 892
893 /*
894 * Most likely AP is not in the range so remove the
77fdaa12 895 * bss struct for that AP.
7a947080 896 */
77fdaa12 897 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 898
899 /*
900 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 901 * due to work needing to be done. Hence, queue the STAs work
902 * again for that.
11432379
HS		 903 */
904 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 905 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 906 }
f0706e82 907
77fdaa12
JB		 908 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
909 sdata->dev->name, wk->bss->cbss.bssid,
910 wk->tries);
f0706e82 911
77fdaa12
JB		 912 /*
913 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 914 * will not answer to direct packet in unassociated state.
915 */
77fdaa12
JB		 916 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
917
918 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
919 mod_timer(&ifmgd->timer, wk->timeout);
9ac19a90 920
77fdaa12 921 return RX_MGMT_NONE;
60f8b39c 922}
f0706e82 923
9ac19a90 924
77fdaa12
JB		 925static enum rx_mgmt_action __must_check
926ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
927 struct ieee80211_mgd_work *wk)
f0706e82 928{
46900298 929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 930 struct ieee80211_local *local = sdata->local;
46900298 931
77fdaa12
JB		 932 wk->tries++;
933 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 934 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 935 " timed out\n",
77fdaa12
JB		 936 sdata->dev->name, wk->bss->cbss.bssid);
937
938 /*
939 * Most likely AP is not in the range so remove the
940 * bss struct for that AP.
941 */
942 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 943
944 /*
945 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 946 * due to work needing to be done. Hence, queue the STAs work
947 * again for that.
11432379
HS		 948 */
949 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 950 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 951 }
f0706e82 952
77fdaa12
JB		 953 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
954 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
955
956 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
957 wk->bss->cbss.bssid, 0);
958 wk->auth_transaction = 2;
f0706e82 959
77fdaa12
JB		 960 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
961 mod_timer(&ifmgd->timer, wk->timeout);
9ac19a90 962
77fdaa12 963 return RX_MGMT_NONE;
f0706e82
JB		 964}
965
aa458d17 966static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
77fdaa12 967 const u8 *bssid, bool deauth)
aa458d17 968{
46900298 969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 970 struct ieee80211_local *local = sdata->local;
971 struct sta_info *sta;
e0cb686f 972 u32 changed = 0, config_changed = 0;
aa458d17 973
77fdaa12
JB		 974 ASSERT_MGD_MTX(ifmgd);
975
976 ifmgd->associated = NULL;
977 memset(ifmgd->bssid, 0, ETH_ALEN);
978
979 /*
980 * we need to commit the associated = NULL change because the
981 * scan code uses that to determine whether this iface should
982 * go to/wake up from powersave or not -- and could otherwise
983 * wake the queues erroneously.
984 */
985 smp_mb();
986
987 /*
988 * Thus, we can only afterwards stop the queues -- to account
989 * for the case where another CPU is finishing a scan at this
990 * time -- we don't want the scan code to enable queues.
991 */
aa458d17 992
24e64622 993 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 994 netif_carrier_off(sdata->dev);
995
1fa6f4af 996 rcu_read_lock();
77fdaa12 997 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 998 if (sta)
999 ieee80211_sta_tear_down_BA_sessions(sta);
1000 rcu_read_unlock();
aa458d17 1001
f5e5bf25
TW		 1002 changed |= ieee80211_reset_erp_info(sdata);
1003
f5e5bf25 1004 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1005 changed |= BSS_CHANGED_ASSOC;
1006 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1007
aa837e1d
JB		 1008 ieee80211_set_wmm_default(sdata);
1009
5cff20e6
JB		 1010 ieee80211_recalc_idle(local);
1011
4797938c 1012 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1013 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1014
413ad50a
JB		 1015 /* on the next assoc, re-program HT parameters */
1016 sdata->ht_opmode_valid = false;
1017
a8302de9
VT		 1018 local->power_constr_level = 0;
1019
520eb820
KV		 1020 del_timer_sync(&local->dynamic_ps_timer);
1021 cancel_work_sync(&local->dynamic_ps_enable_work);
1022
e0cb686f
KV		 1023 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1024 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1025 config_changed |= IEEE80211_CONF_CHANGE_PS;
1026 }
ae5eb026 1027
e0cb686f 1028 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1029
1030 /* And the BSSID changed -- not very interesting here */
1031 changed |= BSS_CHANGED_BSSID;
ae5eb026 1032 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1033
1034 rcu_read_lock();
1035
77fdaa12 1036 sta = sta_info_get(local, bssid);
8e268e47
TW		 1037 if (!sta) {
1038 rcu_read_unlock();
1039 return;
1040 }
1041
1042 sta_info_unlink(&sta);
1043
1044 rcu_read_unlock();
1045
1046 sta_info_destroy(sta);
aa458d17 1047}
f0706e82 1048
77fdaa12
JB		 1049static enum rx_mgmt_action __must_check
1050ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1051 struct ieee80211_mgd_work *wk)
f0706e82 1052{
46900298 1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1054 struct ieee80211_local *local = sdata->local;
46900298 1055
77fdaa12
JB		 1056 wk->tries++;
1057 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1058 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1059 " timed out\n",
77fdaa12
JB		 1060 sdata->dev->name, wk->bss->cbss.bssid);
1061
1062 /*
1063 * Most likely AP is not in the range so remove the
1064 * bss struct for that AP.
1065 */
1066 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1067
11432379
HS		 1068 /*
1069 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1070 * due to work needing to be done. Hence, queue the STAs work
1071 * again for that.
11432379
HS		 1072 */
1073 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 1074 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1075 }
1076
77fdaa12
JB		 1077 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1078 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1079 ieee80211_send_assoc(sdata, wk);
1080
1081 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
1082 mod_timer(&ifmgd->timer, wk->timeout);
f0706e82 1083
77fdaa12 1084 return RX_MGMT_NONE;
f0706e82
JB		 1085}
1086
3cf335d5
KV		 1087void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1088 struct ieee80211_hdr *hdr)
1089{
1090 /*
1091 * We can postpone the mgd.timer whenever receiving unicast frames
1092 * from AP because we know that the connection is working both ways
1093 * at that time. But multicast frames (and hence also beacons) must
1094 * be ignored here, because we need to trigger the timer during
1095 * data idle periods for sending the periodical probe request to
1096 * the AP.
1097 */
1098 if (!is_multicast_ether_addr(hdr->addr1))
1099 mod_timer(&sdata->u.mgd.timer,
1100 jiffies + IEEE80211_MONITORING_INTERVAL);
1101}
f0706e82 1102
04de8381
KV		 1103void ieee80211_beacon_loss_work(struct work_struct *work)
1104{
1105 struct ieee80211_sub_if_data *sdata =
1106 container_of(work, struct ieee80211_sub_if_data,
1107 u.mgd.beacon_loss_work);
1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1109 const u8 *ssid;
04de8381 1110
34bfc411
JB		 1111 /*
1112 * The driver has already reported this event and we have
1113 * already sent a probe request. Maybe the AP died and the
1114 * driver keeps reporting until we disassociate... We have
1115 * to ignore that because otherwise we would continually
1116 * reset the timer and never check whether we received a
1117 * probe response!
1118 */
1119 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1120 return;
1121
77fdaa12
JB		 1122 mutex_lock(&ifmgd->mtx);
1123
1124 if (!ifmgd->associated)
1125 goto out;
1126
a860402d 1127#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
77fdaa12
JB		 1128 if (net_ratelimit())
1129 printk(KERN_DEBUG "%s: driver reports beacon loss from AP "
1130 "- sending probe request\n", sdata->dev->name);
a860402d 1131#endif
04de8381
KV		 1132
1133 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1134
1135 mutex_lock(&sdata->local->iflist_mtx);
1136 ieee80211_recalc_ps(sdata->local, -1);
1137 mutex_unlock(&sdata->local->iflist_mtx);
1138
77fdaa12
JB		 1139 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1140 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1141 ssid + 2, ssid[1], NULL, 0);
04de8381 1142
e0502de6 1143 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
77fdaa12
JB		 1144 out:
1145 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1146}
1147
1148void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1149{
1150 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1151
1152 queue_work(sdata->local->hw.workqueue,
1153 &sdata->u.mgd.beacon_loss_work);
1154}
1155EXPORT_SYMBOL(ieee80211_beacon_loss);
1156
77fdaa12
JB		 1157static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1158 struct ieee80211_mgd_work *wk)
f0706e82 1159{
77fdaa12 1160 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1161 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1162}
1163
1164
f698d856 1165static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1166 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1167 struct ieee80211_mgmt *mgmt,
1168 size_t len)
1169{
1170 u8 *pos;
1171 struct ieee802_11_elems elems;
1172
f0706e82 1173 pos = mgmt->u.auth.variable;
67a4cce4 1174 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1175 if (!elems.challenge)
f0706e82 1176 return;
77fdaa12 1177 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1178 elems.challenge - 2, elems.challenge_len + 2,
77fdaa12
JB		 1179 wk->bss->cbss.bssid, 1);
1180 wk->auth_transaction = 4;
fe3d2c3f
JB		 1181}
1182
77fdaa12
JB		 1183static enum rx_mgmt_action __must_check
1184ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1185 struct ieee80211_mgd_work *wk,
1186 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1187{
f0706e82
JB		 1188 u16 auth_alg, auth_transaction, status_code;
1189
77fdaa12
JB		 1190 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1191 return RX_MGMT_NONE;
f0706e82 1192
f4ea83dd 1193 if (len < 24 + 6)
77fdaa12 1194 return RX_MGMT_NONE;
f0706e82 1195
77fdaa12
JB		 1196 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1197 return RX_MGMT_NONE;
f0706e82 1198
77fdaa12
JB		 1199 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1200 return RX_MGMT_NONE;
f0706e82
JB		 1201
1202 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1203 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1204 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1205
77fdaa12
JB		 1206 if (auth_alg != wk->auth_alg ||
1207 auth_transaction != wk->auth_transaction)
1208 return RX_MGMT_NONE;
f0706e82
JB		 1209
1210 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1211 list_del(&wk->list);
1212 kfree(wk);
1213 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1214 }
1215
77fdaa12 1216 switch (wk->auth_alg) {
f0706e82
JB		 1217 case WLAN_AUTH_OPEN:
1218 case WLAN_AUTH_LEAP:
636a5d36 1219 case WLAN_AUTH_FT:
77fdaa12
JB		 1220 ieee80211_auth_completed(sdata, wk);
1221 return RX_MGMT_CFG80211_AUTH;
f0706e82 1222 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1223 if (wk->auth_transaction == 4) {
1224 ieee80211_auth_completed(sdata, wk);
1225 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1226 } else
77fdaa12 1227 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1228 break;
1229 }
77fdaa12
JB		 1230
1231 return RX_MGMT_NONE;
f0706e82
JB		 1232}
1233
1234
77fdaa12
JB		 1235static enum rx_mgmt_action __must_check
1236ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1237 struct ieee80211_mgd_work *wk,
1238 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1239{
46900298 1240 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1241 const u8 *bssid = NULL;
f0706e82
JB		 1242 u16 reason_code;
1243
f4ea83dd 1244 if (len < 24 + 2)
77fdaa12 1245 return RX_MGMT_NONE;
f0706e82 1246
77fdaa12
JB		 1247 ASSERT_MGD_MTX(ifmgd);
1248
1249 if (wk)
1250 bssid = wk->bss->cbss.bssid;
1251 else
1252 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1253
1254 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1255
77fdaa12
JB		 1256 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1257 sdata->dev->name, bssid, reason_code);
1258
1259 if (!wk) {
1260 ieee80211_set_disassoc(sdata, bssid, true);
1261 } else {
1262 list_del(&wk->list);
1263 kfree(wk);
1264 }
f0706e82 1265
77fdaa12 1266 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1267}
1268
1269
77fdaa12
JB		 1270static enum rx_mgmt_action __must_check
1271ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1272 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1273{
46900298 1274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1275 u16 reason_code;
1276
f4ea83dd 1277 if (len < 24 + 2)
77fdaa12 1278 return RX_MGMT_NONE;
f0706e82 1279
77fdaa12
JB		 1280 ASSERT_MGD_MTX(ifmgd);
1281
1282 if (WARN_ON(!ifmgd->associated))
1283 return RX_MGMT_NONE;
1284
1285 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1286 return RX_MGMT_NONE;
f0706e82
JB		 1287
1288 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1289
77fdaa12
JB		 1290 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1291 sdata->dev->name, reason_code);
f0706e82 1292
77fdaa12
JB		 1293 ieee80211_set_disassoc(sdata, ifmgd->associated->cbss.bssid, false);
1294 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1295}
1296
1297
77fdaa12
JB		 1298static enum rx_mgmt_action __must_check
1299ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_mgd_work *wk,
1301 struct ieee80211_mgmt *mgmt, size_t len,
1302 bool reassoc)
f0706e82 1303{
46900298 1304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1305 struct ieee80211_local *local = sdata->local;
8318d78a 1306 struct ieee80211_supported_band *sband;
f0706e82 1307 struct sta_info *sta;
881d948c 1308 u32 rates, basic_rates;
f0706e82
JB		 1309 u16 capab_info, status_code, aid;
1310 struct ieee802_11_elems elems;
bda3933a 1311 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1312 u8 *pos;
ae5eb026 1313 u32 changed = 0;
f0706e82 1314 int i, j;
ddf4ac53 1315 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1316 u16 ap_ht_cap_flags;
f0706e82 1317
77fdaa12
JB		 1318 /*
1319 * AssocResp and ReassocResp have identical structure, so process both
1320 * of them in this function.
1321 */
f0706e82 1322
f4ea83dd 1323 if (len < 24 + 6)
77fdaa12 1324 return RX_MGMT_NONE;
f0706e82 1325
77fdaa12
JB		 1326 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1327 return RX_MGMT_NONE;
f0706e82
JB		 1328
1329 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1330 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1331 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1332
0c68ae26 1333 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1334 "status=%d aid=%d)\n",
0c68ae26 1335 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1336 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1337
63a5ab82
JM		 1338 pos = mgmt->u.assoc_resp.variable;
1339 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1340
1341 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1342 elems.timeout_int && elems.timeout_int_len == 5 &&
1343 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1344 u32 tu, ms;
f797eb7e 1345 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1346 ms = tu * 1024 / 1000;
1347 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1348 "comeback duration %u TU (%u ms)\n",
1349 sdata->dev->name, tu, ms);
77fdaa12 1350 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1351 if (ms > IEEE80211_ASSOC_TIMEOUT)
46900298 1352 mod_timer(&ifmgd->timer,
63a5ab82 1353 jiffies + msecs_to_jiffies(ms));
77fdaa12 1354 return RX_MGMT_NONE;
63a5ab82
JM		 1355 }
1356
f0706e82
JB		 1357 if (status_code != WLAN_STATUS_SUCCESS) {
1358 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1359 sdata->dev->name, status_code);
77fdaa12
JB		 1360 list_del(&wk->list);
1361 kfree(wk);
1362 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1363 }
1364
1dd84aa2
JB		 1365 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1366 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1367 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1368 aid &= ~(BIT(15) | BIT(14));
1369
f0706e82
JB		 1370 if (!elems.supp_rates) {
1371 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1372 sdata->dev->name);
77fdaa12 1373 return RX_MGMT_NONE;
f0706e82
JB		 1374 }
1375
f698d856 1376 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1377 ifmgd->aid = aid;
f0706e82 1378
d0709a65
JB		 1379 rcu_read_lock();
1380
f0706e82 1381 /* Add STA entry for the AP */
77fdaa12 1382 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1383 if (!sta) {
ddf4ac53 1384 newsta = true;
d0709a65 1385
77fdaa12
JB		 1386 rcu_read_unlock();
1387
1388 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1389 if (!sta) {
1390 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1391 " the AP\n", sdata->dev->name);
77fdaa12 1392 return RX_MGMT_NONE;
f0706e82 1393 }
f709fc69 1394
60f8b39c
JB		 1395 /* update new sta with its last rx activity */
1396 sta->last_rx = jiffies;
f709fc69 1397
77fdaa12
JB		 1398 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1399 WLAN_STA_ASSOC_AP);
1400 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1401 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1402
77fdaa12
JB		 1403 rcu_read_lock();
1404 }
05e5e883 1405
60f8b39c
JB		 1406 rates = 0;
1407 basic_rates = 0;
1408 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1409
60f8b39c
JB		 1410 for (i = 0; i < elems.supp_rates_len; i++) {
1411 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1412 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1413
60f8b39c
JB		 1414 if (rate > 110)
1415 have_higher_than_11mbit = true;
1416
1417 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1418 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1419 rates |= BIT(j);
d61272cb
TW		 1420 if (is_basic)
1421 basic_rates |= BIT(j);
1422 break;
1423 }
f709fc69 1424 }
f709fc69
LCC		 1425 }
1426
60f8b39c
JB		 1427 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1428 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1429 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1430
60f8b39c
JB		 1431 if (rate > 110)
1432 have_higher_than_11mbit = true;
f0706e82 1433
60f8b39c 1434 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1435 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1436 rates |= BIT(j);
d61272cb
TW		 1437 if (is_basic)
1438 basic_rates |= BIT(j);
1439 break;
1440 }
60f8b39c 1441 }
1ebebea8 1442 }
f0706e82 1443
323ce79a 1444 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1445 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1446
1447 /* cf. IEEE 802.11 9.2.12 */
1448 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1449 have_higher_than_11mbit)
1450 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1451 else
1452 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1453
ab1faead 1454 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1455 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1456 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1457
1458 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1459
4b7679a5 1460 rate_control_rate_init(sta);
f0706e82 1461
46900298 1462 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1463 set_sta_flags(sta, WLAN_STA_MFP);
1464
ddf4ac53 1465 if (elems.wmm_param)
60f8b39c 1466 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1467
1468 if (newsta) {
1469 int err = sta_info_insert(sta);
1470 if (err) {
1471 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1472 " the AP (error %d)\n", sdata->dev->name, err);
1473 rcu_read_unlock();
77fdaa12 1474 return RX_MGMT_NONE;
ddf4ac53
JB		 1475 }
1476 }
1477
1478 rcu_read_unlock();
1479
1480 if (elems.wmm_param)
46900298 1481 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1482 elems.wmm_param_len);
aa837e1d
JB		 1483 else
1484 ieee80211_set_wmm_default(sdata);
f0706e82 1485
ae5eb026 1486 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1487 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1488 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1489 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1490 wk->bss->cbss.bssid,
ae5eb026
JB		 1491 ap_ht_cap_flags);
1492
60f8b39c
JB		 1493 /* set AID and assoc capability,
1494 * ieee80211_set_associated() will tell the driver */
1495 bss_conf->aid = aid;
1496 bss_conf->assoc_capability = capab_info;
77fdaa12 1497 ieee80211_set_associated(sdata, wk->bss, changed);
f0706e82 1498
15b7b062
KV		 1499 /*
1500 * initialise the time of last beacon to be the association time,
1501 * otherwise beacon loss check will trigger immediately
1502 */
1503 ifmgd->last_beacon = jiffies;
1504
77fdaa12
JB		 1505 list_del(&wk->list);
1506 kfree(wk);
1507 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1508}
1509
1510
98c8fccf
JB		 1511static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1512 struct ieee80211_mgmt *mgmt,
1513 size_t len,
1514 struct ieee80211_rx_status *rx_status,
1515 struct ieee802_11_elems *elems,
1516 bool beacon)
1517{
1518 struct ieee80211_local *local = sdata->local;
1519 int freq;
c2b13452 1520 struct ieee80211_bss *bss;
98c8fccf 1521 struct ieee80211_channel *channel;
98c8fccf
JB		 1522
1523 if (elems->ds_params && elems->ds_params_len == 1)
1524 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1525 else
1526 freq = rx_status->freq;
1527
1528 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1529
1530 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1531 return;
1532
98c8fccf 1533 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1534 channel, beacon);
77fdaa12
JB		 1535 if (bss)
1536 ieee80211_rx_bss_put(local, bss);
1537
1538 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1539 return;
1540
c481ec97 1541 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1542 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1543 ETH_ALEN) == 0)) {
c481ec97
S		 1544 struct ieee80211_channel_sw_ie *sw_elem =
1545 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1546 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1547 }
f0706e82
JB		 1548}
1549
1550
f698d856 1551static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1552 struct ieee80211_mgd_work *wk,
1553 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1554 struct ieee80211_rx_status *rx_status)
1555{
15b7b062 1556 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1557 size_t baselen;
1558 struct ieee802_11_elems elems;
1559
15b7b062
KV		 1560 ifmgd = &sdata->u.mgd;
1561
77fdaa12
JB		 1562 ASSERT_MGD_MTX(ifmgd);
1563
8e7cdbb6
TW		 1564 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1565 return; /* ignore ProbeResp to foreign address */
1566
ae6a44e3
EK		 1567 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1568 if (baselen > len)
1569 return;
1570
1571 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1572 &elems);
1573
98c8fccf 1574 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1575
1576 /* direct probe may be part of the association flow */
77fdaa12 1577 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1578 printk(KERN_DEBUG "%s direct probe responded\n",
1579 sdata->dev->name);
77fdaa12
JB		 1580 wk->tries = 0;
1581 wk->state = IEEE80211_MGD_STATE_AUTH;
1582 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1583 }
15b7b062 1584
77fdaa12
JB		 1585 if (ifmgd->associated &&
1586 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1587 ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
15b7b062 1588 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1589 mutex_lock(&sdata->local->iflist_mtx);
1590 ieee80211_recalc_ps(sdata->local, -1);
1591 mutex_unlock(&sdata->local->iflist_mtx);
1592 }
f0706e82
JB		 1593}
1594
d91f36db
JB		 1595/*
1596 * This is the canonical list of information elements we care about,
1597 * the filter code also gives us all changes to the Microsoft OUI
1598 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1599 *
1600 * We implement beacon filtering in software since that means we can
1601 * avoid processing the frame here and in cfg80211, and userspace
1602 * will not be able to tell whether the hardware supports it or not.
1603 *
1604 * XXX: This list needs to be dynamic -- userspace needs to be able to
1605 * add items it requires. It also needs to be able to tell us to
1606 * look out for other vendor IEs.
1607 */
1608static const u64 care_about_ies =
1d4df3a5
JB		 1609 (1ULL << WLAN_EID_COUNTRY) |
1610 (1ULL << WLAN_EID_ERP_INFO) |
1611 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1612 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1613 (1ULL << WLAN_EID_HT_CAPABILITY) |
1614 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1615
f698d856 1616static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1617 struct ieee80211_mgmt *mgmt,
1618 size_t len,
1619 struct ieee80211_rx_status *rx_status)
1620{
d91f36db 1621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1622 size_t baselen;
1623 struct ieee802_11_elems elems;
f698d856 1624 struct ieee80211_local *local = sdata->local;
471b3efd 1625 u32 changed = 0;
d91f36db 1626 bool erp_valid, directed_tim = false;
7a5158ef 1627 u8 erp_value = 0;
d91f36db 1628 u32 ncrc;
77fdaa12
JB		 1629 u8 *bssid;
1630
1631 ASSERT_MGD_MTX(ifmgd);
f0706e82 1632
ae6a44e3
EK		 1633 /* Process beacon from the current BSS */
1634 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1635 if (baselen > len)
1636 return;
1637
d91f36db 1638 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1639 return;
f0706e82 1640
77fdaa12
JB		 1641 if (WARN_ON(!ifmgd->associated))
1642 return;
1643
1644 bssid = ifmgd->associated->cbss.bssid;
1645
1646 if (WARN_ON(memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0))
f0706e82
JB		 1647 return;
1648
92778180
JM		 1649 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1650#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1651 if (net_ratelimit()) {
1652 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1653 "to a received beacon\n", sdata->dev->name);
1654 }
1655#endif
1656 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1657 mutex_lock(&local->iflist_mtx);
1658 ieee80211_recalc_ps(local, -1);
1659 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1660 }
1661
d91f36db
JB		 1662 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1663 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1664 len - baselen, &elems,
1665 care_about_ies, ncrc);
1666
1667 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1668 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1669 ifmgd->aid);
d91f36db 1670
30196673
JM		 1671 if (ncrc != ifmgd->beacon_crc) {
1672 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1673 true);
d91f36db 1674
30196673
JM		 1675 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1676 elems.wmm_param_len);
1677 }
fe3fa827 1678
25c9c875 1679 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1680 if (directed_tim) {
572e0012
KV		 1681 if (local->hw.conf.dynamic_ps_timeout > 0) {
1682 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1683 ieee80211_hw_config(local,
1684 IEEE80211_CONF_CHANGE_PS);
1685 ieee80211_send_nullfunc(local, sdata, 0);
1686 } else {
1687 local->pspolling = true;
1688
1689 /*
1690 * Here is assumed that the driver will be
1691 * able to send ps-poll frame and receive a
1692 * response even though power save mode is
1693 * enabled, but some drivers might require
1694 * to disable power save here. This needs
1695 * to be investigated.
1696 */
1697 ieee80211_send_pspoll(local, sdata);
1698 }
a97b77b9
VN		 1699 }
1700 }
7a5158ef 1701
30196673
JM		 1702 if (ncrc == ifmgd->beacon_crc)
1703 return;
1704 ifmgd->beacon_crc = ncrc;
1705
7a5158ef
JB		 1706 if (elems.erp_info && elems.erp_info_len >= 1) {
1707 erp_valid = true;
1708 erp_value = elems.erp_info[0];
1709 } else {
1710 erp_valid = false;
50c4afb9 1711 }
7a5158ef
JB		 1712 changed |= ieee80211_handle_bss_capability(sdata,
1713 le16_to_cpu(mgmt->u.beacon.capab_info),
1714 erp_valid, erp_value);
f0706e82 1715
d3c990fb 1716
53d6f81c 1717 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1718 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1719 struct sta_info *sta;
1720 struct ieee80211_supported_band *sband;
1721 u16 ap_ht_cap_flags;
1722
1723 rcu_read_lock();
1724
77fdaa12
JB		 1725 sta = sta_info_get(local, bssid);
1726 if (WARN_ON(!sta)) {
ae5eb026
JB		 1727 rcu_read_unlock();
1728 return;
1729 }
1730
1731 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1732
1733 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1734 elems.ht_cap_elem, &sta->sta.ht_cap);
1735
1736 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1737
1738 rcu_read_unlock();
1739
1740 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1741 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1742 }
1743
3f2355cb
LR		 1744 if (elems.country_elem) {
1745 /* Note we are only reviewing this on beacons
1746 * for the BSSID we are associated to */
1747 regulatory_hint_11d(local->hw.wiphy,
1748 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1749
1750 /* TODO: IBSS also needs this */
1751 if (elems.pwr_constr_elem)
1752 ieee80211_handle_pwr_constr(sdata,
1753 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1754 elems.pwr_constr_elem,
1755 elems.pwr_constr_elem_len);
3f2355cb
LR		 1756 }
1757
471b3efd 1758 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1759}
1760
46900298 1761ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1762 struct sk_buff *skb)
f0706e82 1763{
f698d856 1764 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1765 struct ieee80211_mgmt *mgmt;
1766 u16 fc;
1767
1768 if (skb->len < 24)
46900298 1769 return RX_DROP_MONITOR;
f0706e82
JB		 1770
1771 mgmt = (struct ieee80211_mgmt *) skb->data;
1772 fc = le16_to_cpu(mgmt->frame_control);
1773
1774 switch (fc & IEEE80211_FCTL_STYPE) {
1775 case IEEE80211_STYPE_PROBE_REQ:
1776 case IEEE80211_STYPE_PROBE_RESP:
1777 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1778 case IEEE80211_STYPE_AUTH:
1779 case IEEE80211_STYPE_ASSOC_RESP:
1780 case IEEE80211_STYPE_REASSOC_RESP:
1781 case IEEE80211_STYPE_DEAUTH:
1782 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1783 case IEEE80211_STYPE_ACTION:
46900298
JB		 1784 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1785 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1786 return RX_QUEUED;
f0706e82
JB		 1787 }
1788
46900298 1789 return RX_DROP_MONITOR;
f0706e82
JB		 1790}
1791
f698d856 1792static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1793 struct sk_buff *skb)
1794{
77fdaa12 1795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1796 struct ieee80211_rx_status *rx_status;
f0706e82 1797 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1798 struct ieee80211_mgd_work *wk;
1799 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1800 u16 fc;
1801
f0706e82
JB		 1802 rx_status = (struct ieee80211_rx_status *) skb->cb;
1803 mgmt = (struct ieee80211_mgmt *) skb->data;
1804 fc = le16_to_cpu(mgmt->frame_control);
1805
77fdaa12
JB		 1806 mutex_lock(&ifmgd->mtx);
1807
1808 if (ifmgd->associated &&
1809 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1810 ETH_ALEN) == 0) {
1811 switch (fc & IEEE80211_FCTL_STYPE) {
1812 case IEEE80211_STYPE_BEACON:
1813 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1814 rx_status);
1815 break;
1816 case IEEE80211_STYPE_PROBE_RESP:
1817 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1818 skb->len, rx_status);
1819 break;
1820 case IEEE80211_STYPE_DEAUTH:
1821 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1822 mgmt, skb->len);
1823 break;
1824 case IEEE80211_STYPE_DISASSOC:
1825 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1826 break;
1827 case IEEE80211_STYPE_ACTION:
1828 /* XXX: differentiate, can only happen for CSA now! */
1829 ieee80211_sta_process_chanswitch(sdata,
1830 &mgmt->u.action.u.chan_switch.sw_elem,
1831 ifmgd->associated);
1832 break;
1833 }
1834 mutex_unlock(&ifmgd->mtx);
1835
1836 switch (rma) {
1837 case RX_MGMT_NONE:
1838 /* no action */
1839 break;
1840 case RX_MGMT_CFG80211_DEAUTH:
667503dd
JB		 1841 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1842 NULL);
77fdaa12
JB		 1843 break;
1844 case RX_MGMT_CFG80211_DISASSOC:
667503dd
JB		 1845 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1846 NULL);
77fdaa12
JB		 1847 break;
1848 default:
1849 WARN(1, "unexpected: %d", rma);
1850 }
1851 goto out;
1852 }
1853
1854 list_for_each_entry(wk, &ifmgd->work_list, list) {
1855 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1856 continue;
1857
1858 switch (fc & IEEE80211_FCTL_STYPE) {
1859 case IEEE80211_STYPE_PROBE_RESP:
1860 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1861 rx_status);
1862 break;
1863 case IEEE80211_STYPE_AUTH:
1864 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1865 break;
1866 case IEEE80211_STYPE_ASSOC_RESP:
1867 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1868 skb->len, false);
1869 break;
1870 case IEEE80211_STYPE_REASSOC_RESP:
1871 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1872 skb->len, true);
1873 break;
1874 case IEEE80211_STYPE_DEAUTH:
1875 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1876 skb->len);
1877 break;
1878 }
1879 /*
1880 * We've processed this frame for that work, so it can't
1881 * belong to another work struct.
1882 * NB: this is also required for correctness because the
1883 * called functions can free 'wk', and for 'rma'!
1884 */
46900298 1885 break;
77fdaa12
JB		 1886 }
1887
1888 mutex_unlock(&ifmgd->mtx);
1889
1890 switch (rma) {
1891 case RX_MGMT_NONE:
1892 /* no action */
46900298 1893 break;
77fdaa12 1894 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 1895 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 1896 break;
77fdaa12 1897 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 1898 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 1899 break;
77fdaa12
JB		 1900 default:
1901 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 1902 }
1903
77fdaa12 1904 out:
f0706e82
JB		 1905 kfree_skb(skb);
1906}
1907
9c6bd790 1908static void ieee80211_sta_timer(unsigned long data)
f0706e82 1909{
60f8b39c
JB		 1910 struct ieee80211_sub_if_data *sdata =
1911 (struct ieee80211_sub_if_data *) data;
46900298 1912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1913 struct ieee80211_local *local = sdata->local;
f0706e82 1914
5bb644a0
JB		 1915 if (local->quiescing) {
1916 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1917 return;
1918 }
1919
46900298 1920 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1921}
1922
9c6bd790
JB		 1923static void ieee80211_sta_work(struct work_struct *work)
1924{
1925 struct ieee80211_sub_if_data *sdata =
46900298 1926 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1927 struct ieee80211_local *local = sdata->local;
46900298 1928 struct ieee80211_if_managed *ifmgd;
9c6bd790 1929 struct sk_buff *skb;
77fdaa12
JB		 1930 struct ieee80211_mgd_work *wk, *tmp;
1931 LIST_HEAD(free_work);
1932 enum rx_mgmt_action rma;
1933 bool anybusy = false;
9c6bd790
JB		 1934
1935 if (!netif_running(sdata->dev))
1936 return;
1937
c2b13452 1938 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 1939 return;
1940
46900298 1941 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1942 return;
5bb644a0
JB		 1943
1944 /*
1945 * Nothing should have been stuffed into the workqueue during
1946 * the suspend->resume cycle. If this WARN is seen then there
1947 * is a bug with either the driver suspend or something in
1948 * mac80211 stuffing into the workqueue which we haven't yet
1949 * cleared during mac80211's suspend cycle.
1950 */
1951 if (WARN_ON(local->suspended))
1952 return;
1953
46900298 1954 ifmgd = &sdata->u.mgd;
f0706e82 1955
77fdaa12 1956 /* first process frames to avoid timing out while a frame is pending */
46900298 1957 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 1958 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1959
77fdaa12
JB		 1960 /* then process the rest of the work */
1961 mutex_lock(&ifmgd->mtx);
1962
1963 list_for_each_entry(wk, &ifmgd->work_list, list) {
1964 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
1965 anybusy = true;
1966 break;
1967 }
f0706e82
JB		 1968 }
1969
77fdaa12
JB		 1970 ieee80211_recalc_idle(local);
1971
1972 if (!anybusy) {
1973 mutex_unlock(&ifmgd->mtx);
1974
1975 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
1976 queue_delayed_work(local->hw.workqueue,
1977 &local->scan_work,
1978 round_jiffies_relative(0));
9c6bd790 1979 return;
77fdaa12 1980 }
d6f2da5b 1981
77fdaa12
JB		 1982 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
1983 if (time_before(jiffies, wk->timeout))
1984 continue;
5cff20e6 1985
77fdaa12
JB		 1986 switch (wk->state) {
1987 default:
1988 WARN_ON(1);
1989 /* fall through */
1990 case IEEE80211_MGD_STATE_IDLE:
1991 /* nothing */
1992 rma = RX_MGMT_NONE;
1993 break;
1994 case IEEE80211_MGD_STATE_PROBE:
1995 rma = ieee80211_direct_probe(sdata, wk);
1996 break;
1997 case IEEE80211_MGD_STATE_AUTH:
1998 rma = ieee80211_authenticate(sdata, wk);
1999 break;
2000 case IEEE80211_MGD_STATE_ASSOC:
2001 rma = ieee80211_associate(sdata, wk);
2002 break;
2003 }
2004
2005 switch (rma) {
2006 case RX_MGMT_NONE:
2007 /* no action required */
2008 break;
2009 case RX_MGMT_CFG80211_AUTH_TO:
2010 case RX_MGMT_CFG80211_ASSOC_TO:
2011 list_del(&wk->list);
2012 list_add(&wk->list, &free_work);
2013 wk->tries = rma; /* small abuse but only local */
2014 break;
2015 default:
2016 WARN(1, "unexpected: %d", rma);
2017 }
2018 }
2019
2020 mutex_unlock(&ifmgd->mtx);
2021
2022 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2023 switch (wk->tries) {
2024 case RX_MGMT_CFG80211_AUTH_TO:
2025 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2026 wk->bss->cbss.bssid);
77fdaa12
JB		 2027 break;
2028 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2029 cfg80211_send_assoc_timeout(sdata->dev,
2030 wk->bss->cbss.bssid);
77fdaa12
JB		 2031 break;
2032 default:
2033 WARN(1, "unexpected: %d", wk->tries);
2034 }
2035
2036 list_del(&wk->list);
2037 kfree(wk);
9c6bd790 2038 }
77fdaa12
JB		 2039
2040 ieee80211_recalc_idle(local);
f0706e82
JB		 2041}
2042
9c6bd790
JB		 2043static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2044{
ad935687
KV		 2045 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2046 /*
2047 * Need to update last_beacon to avoid beacon loss
2048 * test to trigger.
2049 */
2050 sdata->u.mgd.last_beacon = jiffies;
2051
9c6bd790 2052 queue_work(sdata->local->hw.workqueue,
46900298 2053 &sdata->u.mgd.work);
ad935687 2054 }
9c6bd790 2055}
f0706e82 2056
5bb644a0
JB		 2057#ifdef CONFIG_PM
2058void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2059{
2060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2061
2062 /*
2063 * we need to use atomic bitops for the running bits
2064 * only because both timers might fire at the same
2065 * time -- the code here is properly synchronised.
2066 */
2067
2068 cancel_work_sync(&ifmgd->work);
2069 cancel_work_sync(&ifmgd->beacon_loss_work);
2070 if (del_timer_sync(&ifmgd->timer))
2071 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2072
2073 cancel_work_sync(&ifmgd->chswitch_work);
2074 if (del_timer_sync(&ifmgd->chswitch_timer))
2075 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2076}
2077
2078void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2079{
2080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2081
2082 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2083 add_timer(&ifmgd->timer);
2084 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2085 add_timer(&ifmgd->chswitch_timer);
2086}
2087#endif
2088
9c6bd790
JB		 2089/* interface setup */
2090void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2091{
46900298 2092 struct ieee80211_if_managed *ifmgd;
988c0f72 2093
46900298
JB		 2094 ifmgd = &sdata->u.mgd;
2095 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2096 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2097 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2098 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2099 (unsigned long) sdata);
46900298 2100 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2101 (unsigned long) sdata);
46900298 2102 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2103
77fdaa12
JB		 2104 INIT_LIST_HEAD(&ifmgd->work_list);
2105
46900298 2106 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2107 ifmgd->flags = 0;
176be728 2108 if (sdata->local->hw.queues >= 4)
46900298 2109 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2110
77fdaa12 2111 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2112}
2113
77fdaa12
JB		 2114/* scan finished notification */
2115void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2116{
77fdaa12 2117 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2118
77fdaa12
JB		 2119 /* Restart STA timers */
2120 rcu_read_lock();
2121 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2122 ieee80211_restart_sta_timer(sdata);
2123 rcu_read_unlock();
2124}
60f8b39c 2125
77fdaa12
JB		 2126int ieee80211_max_network_latency(struct notifier_block *nb,
2127 unsigned long data, void *dummy)
2128{
2129 s32 latency_usec = (s32) data;
2130 struct ieee80211_local *local =
2131 container_of(nb, struct ieee80211_local,
2132 network_latency_notifier);
1fa6f4af 2133
77fdaa12
JB		 2134 mutex_lock(&local->iflist_mtx);
2135 ieee80211_recalc_ps(local, latency_usec);
2136 mutex_unlock(&local->iflist_mtx);
dfe67012 2137
77fdaa12 2138 return 0;
9c6bd790
JB		 2139}
2140
77fdaa12
JB		 2141/* config hooks */
2142int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2143 struct cfg80211_auth_request *req)
9c6bd790 2144{
46900298 2145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2146 const u8 *ssid;
2147 struct ieee80211_mgd_work *wk;
2148 u16 auth_alg;
9c6bd790 2149
77fdaa12
JB		 2150 switch (req->auth_type) {
2151 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2152 auth_alg = WLAN_AUTH_OPEN;
2153 break;
2154 case NL80211_AUTHTYPE_SHARED_KEY:
2155 auth_alg = WLAN_AUTH_SHARED_KEY;
2156 break;
2157 case NL80211_AUTHTYPE_FT:
2158 auth_alg = WLAN_AUTH_FT;
2159 break;
2160 case NL80211_AUTHTYPE_NETWORK_EAP:
2161 auth_alg = WLAN_AUTH_LEAP;
2162 break;
2163 default:
2164 return -EOPNOTSUPP;
60f8b39c 2165 }
77fdaa12
JB		 2166
2167 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2168 if (!wk)
9c6bd790 2169 return -ENOMEM;
77fdaa12
JB		 2170
2171 wk->bss = (void *)req->bss;
2172
2173 if (req->ie && req->ie_len) {
2174 memcpy(wk->ie, req->ie, req->ie_len);
2175 wk->ie_len = req->ie_len;
9c6bd790 2176 }
77fdaa12
JB		 2177
2178 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2179 memcpy(wk->ssid, ssid + 2, ssid[1]);
2180 wk->ssid_len = ssid[1];
2181
2182 wk->state = IEEE80211_MGD_STATE_PROBE;
2183 wk->auth_alg = auth_alg;
2184
2185 /*
2186 * XXX: if still associated need to tell AP that we're going
2187 * to sleep and then change channel etc.
2188 */
2189 sdata->local->oper_channel = req->bss->channel;
2190 ieee80211_hw_config(sdata->local, 0);
2191
2192 mutex_lock(&ifmgd->mtx);
2193 list_add(&wk->list, &sdata->u.mgd.work_list);
2194 mutex_unlock(&ifmgd->mtx);
2195
2196 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
9c6bd790 2197 return 0;
60f8b39c
JB		 2198}
2199
77fdaa12
JB		 2200int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2201 struct cfg80211_assoc_request *req)
f0706e82 2202{
77fdaa12
JB		 2203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2204 struct ieee80211_mgd_work *wk, *found = NULL;
2205 int i, err;
f0706e82 2206
77fdaa12
JB		 2207 mutex_lock(&ifmgd->mtx);
2208
2209 list_for_each_entry(wk, &ifmgd->work_list, list) {
2210 if (&wk->bss->cbss == req->bss &&
2211 wk->state == IEEE80211_MGD_STATE_IDLE) {
2212 found = wk;
2213 break;
2214 }
2215 }
2216
2217 if (!found) {
2218 err = -ENOLINK;
2219 goto out;
2220 }
2221
2222 list_del(&found->list);
2223
2224 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2225 if (!wk) {
2226 list_add(&found->list, &ifmgd->work_list);
2227 err = -ENOMEM;
2228 goto out;
2229 }
2230
2231 list_add(&wk->list, &ifmgd->work_list);
2232
2233 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2234
2235 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2236 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2237 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2238 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2239 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2240
2241 sdata->local->oper_channel = req->bss->channel;
2242 ieee80211_hw_config(sdata->local, 0);
2243
2244 if (req->ie && req->ie_len) {
2245 memcpy(wk->ie, req->ie, req->ie_len);
2246 wk->ie_len = req->ie_len;
2247 } else
2248 wk->ie_len = 0;
2249
2250 if (req->prev_bssid)
2251 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2252
2253 wk->state = IEEE80211_MGD_STATE_ASSOC;
2254 wk->tries = 0;
2255
2256 if (req->use_mfp) {
2257 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2258 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2259 } else {
2260 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2261 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2262 }
2263
2264 if (req->crypto.control_port)
2265 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2266 else
2267 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2268
2269 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2270
2271 err = 0;
2272
2273 out:
2274 mutex_unlock(&ifmgd->mtx);
2275 return err;
f0706e82
JB		 2276}
2277
77fdaa12 2278int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2279 struct cfg80211_deauth_request *req,
2280 void *cookie)
f0706e82 2281{
46900298 2282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2283 struct ieee80211_mgd_work *wk;
2284 const u8 *bssid = NULL;
f0706e82 2285
77fdaa12
JB		 2286 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2287 sdata->dev->name, req->reason_code);
2288
2289 mutex_lock(&ifmgd->mtx);
2290
2291 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2292 bssid = req->bss->bssid;
2293 ieee80211_set_disassoc(sdata, bssid, true);
2294 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2295 if (&wk->bss->cbss == req->bss) {
2296 bssid = req->bss->bssid;
2297 list_del(&wk->list);
2298 kfree(wk);
2299 break;
2300 }
2301 }
f0706e82 2302
77fdaa12
JB		 2303 /* cfg80211 should catch this... */
2304 if (WARN_ON(!bssid)) {
2305 mutex_unlock(&ifmgd->mtx);
46900298 2306 return -ENOLINK;
77fdaa12
JB		 2307 }
2308
2309 mutex_unlock(&ifmgd->mtx);
2310
2311 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2312 IEEE80211_STYPE_DEAUTH, req->reason_code,
2313 cookie);
f0706e82 2314
f0706e82
JB		 2315 return 0;
2316}
84363e6e 2317
77fdaa12 2318int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2319 struct cfg80211_disassoc_request *req,
2320 void *cookie)
9c6bd790 2321{
77fdaa12 2322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2323
77fdaa12
JB		 2324 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2325 sdata->dev->name, req->reason_code);
10f644a4 2326
77fdaa12 2327 mutex_lock(&ifmgd->mtx);
10f644a4 2328
77fdaa12
JB		 2329 /* cfg80211 should catch that */
2330 if (WARN_ON(&ifmgd->associated->cbss != req->bss)) {
2331 mutex_unlock(&ifmgd->mtx);
2332 return -ENOLINK;
2333 }
2334
2335 ieee80211_set_disassoc(sdata, req->bss->bssid, false);
2336
2337 mutex_unlock(&ifmgd->mtx);
10f644a4 2338
77fdaa12 2339 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2340 IEEE80211_STYPE_DISASSOC, req->reason_code,
2341 cookie);
10f644a4
JB		 2342 return 0;
2343}
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