projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
rfkill: Add constant for RFKILL_TYPE_FM radio devices
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82
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
a43abf29 34#define IEEE80211_MAX_PROBE_TRIES 5
b291ba11
JB		 35
36/*
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
39 */
40#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
41/*
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
44 */
d1c5091f 45#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 46/*
47 * Time we wait for a probe response after sending
48 * a probe request because of beacon loss or for
49 * checking the connection still works.
50 */
d1c5091f 51#define IEEE80211_PROBE_WAIT (HZ / 2)
f0706e82 52
5bb644a0
JB		 53#define TMR_RUNNING_TIMER 0
54#define TMR_RUNNING_CHANSW 1
55
77fdaa12
JB		 56/*
57 * All cfg80211 functions have to be called outside a locked
58 * section so that they can acquire a lock themselves... This
59 * is much simpler than queuing up things in cfg80211, but we
60 * do need some indirection for that here.
61 */
62enum rx_mgmt_action {
63 /* no action required */
64 RX_MGMT_NONE,
65
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH,
68
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC,
71
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH,
74
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC,
77
78 /* caller must call cfg80211_auth_timeout() & free work */
79 RX_MGMT_CFG80211_AUTH_TO,
80
81 /* caller must call cfg80211_assoc_timeout() & free work */
82 RX_MGMT_CFG80211_ASSOC_TO,
83};
84
5484e237 85/* utils */
77fdaa12
JB		 86static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
87{
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
89}
90
ca386f31
JB		 91/*
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
99 * do that.
100 */
101static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
103{
104 ASSERT_MGD_MTX(ifmgd);
105
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
109}
110
b291ba11
JB		 111static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
112{
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
114 return;
115
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
118}
119
5484e237 120static int ecw2cw(int ecw)
60f8b39c 121{
5484e237 122 return (1 << ecw) - 1;
60f8b39c
JB		 123}
124
c2b13452 125static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 126 struct ieee80211_supported_band *sband,
881d948c 127 u32 *rates)
9ac19a90
JB		 128{
129 int i, j, count;
130 *rates = 0;
131 count = 0;
132 for (i = 0; i < bss->supp_rates_len; i++) {
133 int rate = (bss->supp_rates[i] & 0x7F) * 5;
134
135 for (j = 0; j < sband->n_bitrates; j++)
136 if (sband->bitrates[j].bitrate == rate) {
137 *rates |= BIT(j);
138 count++;
139 break;
140 }
141 }
142
143 return count;
144}
145
d5522e03
JB		 146/*
147 * ieee80211_enable_ht should be called only after the operating band
148 * has been determined as ht configuration depends on the hw's
149 * HT abilities for a specific band.
150 */
151static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_ht_info *hti,
77fdaa12 153 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 154{
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_supported_band *sband;
d5522e03
JB		 157 struct sta_info *sta;
158 u32 changed = 0;
9ed6bcce 159 u16 ht_opmode;
d5522e03
JB		 160 bool enable_ht = true, ht_changed;
161 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
162
163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
164
d5522e03
JB		 165 /* HT is not supported */
166 if (!sband->ht_cap.ht_supported)
167 enable_ht = false;
168
169 /* check that channel matches the right operating channel */
170 if (local->hw.conf.channel->center_freq !=
171 ieee80211_channel_to_frequency(hti->control_chan))
172 enable_ht = false;
173
174 if (enable_ht) {
175 channel_type = NL80211_CHAN_HT20;
176
177 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
178 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
179 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
180 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
181 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 182 if (!(local->hw.conf.channel->flags &
183 IEEE80211_CHAN_NO_HT40PLUS))
184 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 185 break;
186 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 187 if (!(local->hw.conf.channel->flags &
188 IEEE80211_CHAN_NO_HT40MINUS))
189 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 190 break;
191 }
192 }
193 }
194
195 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
196 channel_type != local->hw.conf.channel_type;
197
198 local->oper_channel_type = channel_type;
199
200 if (ht_changed) {
201 /* channel_type change automatically detected */
202 ieee80211_hw_config(local, 0);
203
204 rcu_read_lock();
77fdaa12 205 sta = sta_info_get(local, bssid);
d5522e03
JB		 206 if (sta)
207 rate_control_rate_update(local, sband, sta,
208 IEEE80211_RC_HT_CHANGED);
d5522e03 209 rcu_read_unlock();
d5522e03
JB		 210 }
211
212 /* disable HT */
213 if (!enable_ht)
214 return 0;
215
9ed6bcce 216 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 217
218 /* if bss configuration changed store the new one */
413ad50a
JB		 219 if (!sdata->ht_opmode_valid ||
220 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 221 changed |= BSS_CHANGED_HT;
9ed6bcce 222 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 223 sdata->ht_opmode_valid = true;
d5522e03
JB		 224 }
225
226 return changed;
227}
228
9c6bd790
JB		 229/* frame sending functions */
230
77fdaa12
JB		 231static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
232 struct ieee80211_mgd_work *wk)
9ac19a90 233{
46900298 234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 235 struct ieee80211_local *local = sdata->local;
236 struct sk_buff *skb;
237 struct ieee80211_mgmt *mgmt;
517357c6
JB		 238 u8 *pos;
239 const u8 *ies, *ht_ie;
9ac19a90
JB		 240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
9ac19a90
JB		 242 int wmm = 0;
243 struct ieee80211_supported_band *sband;
881d948c 244 u32 rates = 0;
9ac19a90
JB		 245
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12
JB		 247 sizeof(*mgmt) + 200 + wk->ie_len +
248 wk->ssid_len);
9ac19a90
JB		 249 if (!skb) {
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
252 return;
253 }
254 skb_reserve(skb, local->hw.extra_tx_headroom);
255
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
257
46900298 258 capab = ifmgd->capab;
9ac19a90
JB		 259
260 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
261 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
262 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
263 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
264 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
265 }
266
77fdaa12
JB		 267 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
268 capab |= WLAN_CAPABILITY_PRIVACY;
269 if (wk->bss->wmm_used)
270 wmm = 1;
9ac19a90 271
77fdaa12
JB		 272 /* get all rates supported by the device and the AP as
273 * some APs don't like getting a superset of their rates
274 * in the association request (e.g. D-Link DAP 1353 in
275 * b-only mode) */
276 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
9ac19a90 277
77fdaa12
JB		 278 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
279 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
280 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 281
282 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
283 memset(mgmt, 0, 24);
77fdaa12 284 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 285 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 286 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 287
77fdaa12 288 if (!is_zero_ether_addr(wk->prev_bssid)) {
9ac19a90
JB		 289 skb_put(skb, 10);
290 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
291 IEEE80211_STYPE_REASSOC_REQ);
292 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
293 mgmt->u.reassoc_req.listen_interval =
294 cpu_to_le16(local->hw.conf.listen_interval);
77fdaa12 295 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
9ac19a90
JB		 296 ETH_ALEN);
297 } else {
298 skb_put(skb, 4);
299 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
300 IEEE80211_STYPE_ASSOC_REQ);
301 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 302 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 303 cpu_to_le16(local->hw.conf.listen_interval);
304 }
305
306 /* SSID */
77fdaa12 307 ies = pos = skb_put(skb, 2 + wk->ssid_len);
9ac19a90 308 *pos++ = WLAN_EID_SSID;
77fdaa12
JB		 309 *pos++ = wk->ssid_len;
310 memcpy(pos, wk->ssid, wk->ssid_len);
9ac19a90
JB		 311
312 /* add all rates which were marked to be used above */
313 supp_rates_len = rates_len;
314 if (supp_rates_len > 8)
315 supp_rates_len = 8;
316
317 len = sband->n_bitrates;
318 pos = skb_put(skb, supp_rates_len + 2);
319 *pos++ = WLAN_EID_SUPP_RATES;
320 *pos++ = supp_rates_len;
321
322 count = 0;
323 for (i = 0; i < sband->n_bitrates; i++) {
324 if (BIT(i) & rates) {
325 int rate = sband->bitrates[i].bitrate;
326 *pos++ = (u8) (rate / 5);
327 if (++count == 8)
328 break;
329 }
330 }
331
332 if (rates_len > count) {
333 pos = skb_put(skb, rates_len - count + 2);
334 *pos++ = WLAN_EID_EXT_SUPP_RATES;
335 *pos++ = rates_len - count;
336
337 for (i++; i < sband->n_bitrates; i++) {
338 if (BIT(i) & rates) {
339 int rate = sband->bitrates[i].bitrate;
340 *pos++ = (u8) (rate / 5);
341 }
342 }
343 }
344
345 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
346 /* 1. power capabilities */
347 pos = skb_put(skb, 4);
348 *pos++ = WLAN_EID_PWR_CAPABILITY;
349 *pos++ = 2;
350 *pos++ = 0; /* min tx power */
351 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
352
353 /* 2. supported channels */
354 /* TODO: get this in reg domain format */
355 pos = skb_put(skb, 2 * sband->n_channels + 2);
356 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
357 *pos++ = 2 * sband->n_channels;
358 for (i = 0; i < sband->n_channels; i++) {
359 *pos++ = ieee80211_frequency_to_channel(
360 sband->channels[i].center_freq);
361 *pos++ = 1; /* one channel in the subband*/
362 }
363 }
364
77fdaa12
JB		 365 if (wk->ie_len && wk->ie) {
366 pos = skb_put(skb, wk->ie_len);
367 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 368 }
369
46900298 370 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 371 pos = skb_put(skb, 9);
372 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
373 *pos++ = 7; /* len */
374 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
375 *pos++ = 0x50;
376 *pos++ = 0xf2;
377 *pos++ = 2; /* WME */
378 *pos++ = 0; /* WME info */
379 *pos++ = 1; /* WME ver */
380 *pos++ = 0;
381 }
382
383 /* wmm support is a must to HT */
eb46936b
VT		 384 /*
385 * IEEE802.11n does not allow TKIP/WEP as pairwise
386 * ciphers in HT mode. We still associate in non-ht
387 * mode (11a/b/g) if any one of these ciphers is
388 * configured as pairwise.
389 */
46900298 390 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 391 sband->ht_cap.ht_supported &&
77fdaa12 392 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 393 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 394 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 395 struct ieee80211_ht_info *ht_info =
396 (struct ieee80211_ht_info *)(ht_ie + 2);
397 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 398 __le16 tmp;
399 u32 flags = local->hw.conf.channel->flags;
400
d9fe60de
JB		 401 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
402 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 403 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 404 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 405 cap &= ~IEEE80211_HT_CAP_SGI_40;
406 }
407 break;
d9fe60de 408 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 409 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 410 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 411 cap &= ~IEEE80211_HT_CAP_SGI_40;
412 }
413 break;
414 }
415
416 tmp = cpu_to_le16(cap);
417 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
418 *pos++ = WLAN_EID_HT_CAPABILITY;
419 *pos++ = sizeof(struct ieee80211_ht_cap);
420 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
421 memcpy(pos, &tmp, sizeof(u16));
422 pos += sizeof(u16);
423 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 424 *pos++ = sband->ht_cap.ampdu_factor |
425 (sband->ht_cap.ampdu_density << 2);
426 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 427 }
428
e50db65c 429 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 430}
431
432
ef422bc0 433static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 434 const u8 *bssid, u16 stype, u16 reason,
435 void *cookie)
9ac19a90
JB		 436{
437 struct ieee80211_local *local = sdata->local;
46900298 438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 439 struct sk_buff *skb;
440 struct ieee80211_mgmt *mgmt;
9aed3cc1 441
65fc73ac 442 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 443 if (!skb) {
ef422bc0
JB		 444 printk(KERN_DEBUG "%s: failed to allocate buffer for "
445 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 446 return;
447 }
448 skb_reserve(skb, local->hw.extra_tx_headroom);
449
450 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
451 memset(mgmt, 0, 24);
77fdaa12 452 memcpy(mgmt->da, bssid, ETH_ALEN);
9ac19a90 453 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 454 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 455 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 456 skb_put(skb, 2);
ef422bc0 457 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 458 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
459
53b46b84 460 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 461 if (cookie)
462 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
463 else
464 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 465 else
ce470613
HS		 466 if (cookie)
467 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
468 else
469 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
46900298 470 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 471}
472
572e0012
KV		 473void ieee80211_send_pspoll(struct ieee80211_local *local,
474 struct ieee80211_sub_if_data *sdata)
475{
46900298 476 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 477 struct ieee80211_pspoll *pspoll;
478 struct sk_buff *skb;
479 u16 fc;
480
481 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
482 if (!skb) {
483 printk(KERN_DEBUG "%s: failed to allocate buffer for "
484 "pspoll frame\n", sdata->dev->name);
485 return;
486 }
487 skb_reserve(skb, local->hw.extra_tx_headroom);
488
489 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
490 memset(pspoll, 0, sizeof(*pspoll));
491 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
492 pspoll->frame_control = cpu_to_le16(fc);
46900298 493 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 494
495 /* aid in PS-Poll has its two MSBs each set to 1 */
496 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
497
46900298 498 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 499 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
500
501 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 502}
503
965bedad
JB		 504void ieee80211_send_nullfunc(struct ieee80211_local *local,
505 struct ieee80211_sub_if_data *sdata,
506 int powersave)
507{
508 struct sk_buff *skb;
509 struct ieee80211_hdr *nullfunc;
510 __le16 fc;
511
512 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
513 return;
514
515 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
516 if (!skb) {
517 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
518 "frame\n", sdata->dev->name);
519 return;
520 }
521 skb_reserve(skb, local->hw.extra_tx_headroom);
522
523 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
524 memset(nullfunc, 0, 24);
525 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
526 IEEE80211_FCTL_TODS);
527 if (powersave)
528 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
529 nullfunc->frame_control = fc;
530 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
531 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
532 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
533
534 ieee80211_tx_skb(sdata, skb, 0);
535}
536
cc32abd4
JB		 537/* spectrum management related things */
538static void ieee80211_chswitch_work(struct work_struct *work)
539{
540 struct ieee80211_sub_if_data *sdata =
541 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
543
544 if (!netif_running(sdata->dev))
545 return;
546
77fdaa12
JB		 547 mutex_lock(&ifmgd->mtx);
548 if (!ifmgd->associated)
549 goto out;
cc32abd4
JB		 550
551 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 552 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
553
cc32abd4 554 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 555 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 556
cc32abd4
JB		 557 ieee80211_wake_queues_by_reason(&sdata->local->hw,
558 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 559 out:
560 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
561 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 562}
563
564static void ieee80211_chswitch_timer(unsigned long data)
565{
566 struct ieee80211_sub_if_data *sdata =
567 (struct ieee80211_sub_if_data *) data;
568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
569
5bb644a0
JB		 570 if (sdata->local->quiescing) {
571 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
572 return;
573 }
574
42935eca 575 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 576}
577
578void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
579 struct ieee80211_channel_sw_ie *sw_elem,
580 struct ieee80211_bss *bss)
581{
582 struct ieee80211_channel *new_ch;
583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
584 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
585
77fdaa12
JB		 586 ASSERT_MGD_MTX(ifmgd);
587
588 if (!ifmgd->associated)
cc32abd4
JB		 589 return;
590
fbe9c429 591 if (sdata->local->scanning)
cc32abd4
JB		 592 return;
593
594 /* Disregard subsequent beacons if we are already running a timer
595 processing a CSA */
596
597 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
598 return;
599
600 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
601 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
602 return;
603
604 sdata->local->csa_channel = new_ch;
605
606 if (sw_elem->count <= 1) {
42935eca 607 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 608 } else {
609 ieee80211_stop_queues_by_reason(&sdata->local->hw,
610 IEEE80211_QUEUE_STOP_REASON_CSA);
611 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
612 mod_timer(&ifmgd->chswitch_timer,
613 jiffies +
614 msecs_to_jiffies(sw_elem->count *
615 bss->cbss.beacon_interval));
616 }
617}
618
619static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
620 u16 capab_info, u8 *pwr_constr_elem,
621 u8 pwr_constr_elem_len)
622{
623 struct ieee80211_conf *conf = &sdata->local->hw.conf;
624
625 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
626 return;
627
628 /* Power constraint IE length should be 1 octet */
629 if (pwr_constr_elem_len != 1)
630 return;
631
632 if ((*pwr_constr_elem <= conf->channel->max_power) &&
633 (*pwr_constr_elem != sdata->local->power_constr_level)) {
634 sdata->local->power_constr_level = *pwr_constr_elem;
635 ieee80211_hw_config(sdata->local, 0);
636 }
637}
638
965bedad
JB		 639/* powersave */
640static void ieee80211_enable_ps(struct ieee80211_local *local,
641 struct ieee80211_sub_if_data *sdata)
642{
643 struct ieee80211_conf *conf = &local->hw.conf;
644
d5edaedc
JB		 645 /*
646 * If we are scanning right now then the parameters will
647 * take effect when scan finishes.
648 */
fbe9c429 649 if (local->scanning)
d5edaedc
JB		 650 return;
651
965bedad
JB		 652 if (conf->dynamic_ps_timeout > 0 &&
653 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
654 mod_timer(&local->dynamic_ps_timer, jiffies +
655 msecs_to_jiffies(conf->dynamic_ps_timeout));
656 } else {
657 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
658 ieee80211_send_nullfunc(local, sdata, 1);
659 conf->flags |= IEEE80211_CONF_PS;
660 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
661 }
662}
663
664static void ieee80211_change_ps(struct ieee80211_local *local)
665{
666 struct ieee80211_conf *conf = &local->hw.conf;
667
668 if (local->ps_sdata) {
965bedad
JB		 669 ieee80211_enable_ps(local, local->ps_sdata);
670 } else if (conf->flags & IEEE80211_CONF_PS) {
671 conf->flags &= ~IEEE80211_CONF_PS;
672 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
673 del_timer_sync(&local->dynamic_ps_timer);
674 cancel_work_sync(&local->dynamic_ps_enable_work);
675 }
676}
677
678/* need to hold RTNL or interface lock */
10f644a4 679void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 680{
681 struct ieee80211_sub_if_data *sdata, *found = NULL;
682 int count = 0;
683
684 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
685 local->ps_sdata = NULL;
686 return;
687 }
688
689 list_for_each_entry(sdata, &local->interfaces, list) {
690 if (!netif_running(sdata->dev))
691 continue;
692 if (sdata->vif.type != NL80211_IFTYPE_STATION)
693 continue;
694 found = sdata;
695 count++;
696 }
697
43f78531 698 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 699 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
b291ba11
JB		 700 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
701 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 702 s32 beaconint_us;
703
704 if (latency < 0)
705 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
706
707 beaconint_us = ieee80211_tu_to_usec(
708 found->vif.bss_conf.beacon_int);
709
04fe2037 710 if (beaconint_us > latency) {
10f644a4 711 local->ps_sdata = NULL;
04fe2037
JB		 712 } else {
713 u8 dtimper = found->vif.bss_conf.dtim_period;
714 int maxslp = 1;
715
716 if (dtimper > 1)
717 maxslp = min_t(int, dtimper,
718 latency / beaconint_us);
719
9ccebe61 720 local->hw.conf.max_sleep_period = maxslp;
10f644a4 721 local->ps_sdata = found;
04fe2037 722 }
10f644a4 723 } else {
965bedad 724 local->ps_sdata = NULL;
10f644a4 725 }
965bedad
JB		 726
727 ieee80211_change_ps(local);
728}
729
730void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
731{
732 struct ieee80211_local *local =
733 container_of(work, struct ieee80211_local,
734 dynamic_ps_disable_work);
735
736 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
737 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
738 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
739 }
740
741 ieee80211_wake_queues_by_reason(&local->hw,
742 IEEE80211_QUEUE_STOP_REASON_PS);
743}
744
745void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
746{
747 struct ieee80211_local *local =
748 container_of(work, struct ieee80211_local,
749 dynamic_ps_enable_work);
750 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
751
752 /* can only happen when PS was just disabled anyway */
753 if (!sdata)
754 return;
755
756 if (local->hw.conf.flags & IEEE80211_CONF_PS)
757 return;
758
759 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
760 ieee80211_send_nullfunc(local, sdata, 1);
761
762 local->hw.conf.flags |= IEEE80211_CONF_PS;
763 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
764}
765
766void ieee80211_dynamic_ps_timer(unsigned long data)
767{
768 struct ieee80211_local *local = (void *) data;
769
78f1a8b7 770 if (local->quiescing || local->suspended)
5bb644a0
JB		 771 return;
772
42935eca 773 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 774}
775
60f8b39c 776/* MLME */
f698d856 777static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 778 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 779 u8 *wmm_param, size_t wmm_param_len)
780{
f0706e82
JB		 781 struct ieee80211_tx_queue_params params;
782 size_t left;
783 int count;
784 u8 *pos;
785
46900298 786 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 787 return;
788
789 if (!wmm_param)
790 return;
791
f0706e82
JB		 792 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
793 return;
794 count = wmm_param[6] & 0x0f;
46900298 795 if (count == ifmgd->wmm_last_param_set)
f0706e82 796 return;
46900298 797 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 798
799 pos = wmm_param + 8;
800 left = wmm_param_len - 8;
801
802 memset(&params, 0, sizeof(params));
803
f0706e82
JB		 804 local->wmm_acm = 0;
805 for (; left >= 4; left -= 4, pos += 4) {
806 int aci = (pos[0] >> 5) & 0x03;
807 int acm = (pos[0] >> 4) & 0x01;
808 int queue;
809
810 switch (aci) {
0eeb59fe 811 case 1: /* AC_BK */
e100bb64 812 queue = 3;
988c0f72 813 if (acm)
0eeb59fe 814 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 815 break;
0eeb59fe 816 case 2: /* AC_VI */
e100bb64 817 queue = 1;
988c0f72 818 if (acm)
0eeb59fe 819 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 820 break;
0eeb59fe 821 case 3: /* AC_VO */
e100bb64 822 queue = 0;
988c0f72 823 if (acm)
0eeb59fe 824 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 825 break;
0eeb59fe 826 case 0: /* AC_BE */
f0706e82 827 default:
e100bb64 828 queue = 2;
988c0f72 829 if (acm)
0eeb59fe 830 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 831 break;
832 }
833
834 params.aifs = pos[0] & 0x0f;
835 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
836 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 837 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 838#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 839 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 840 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 841 wiphy_name(local->hw.wiphy), queue, aci, acm,
842 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 843#endif
24487981 844 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 845 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 846 "parameters for queue %d\n",
847 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 848 }
849}
850
7a5158ef
JB		 851static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
852 u16 capab, bool erp_valid, u8 erp)
5628221c 853{
bda3933a 854 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 855 u32 changed = 0;
7a5158ef
JB		 856 bool use_protection;
857 bool use_short_preamble;
858 bool use_short_slot;
859
860 if (erp_valid) {
861 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
862 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
863 } else {
864 use_protection = false;
865 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
866 }
867
868 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 869
471b3efd 870 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 871 bss_conf->use_cts_prot = use_protection;
872 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 873 }
7e9ed188 874
d43c7b37 875 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 876 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 877 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 878 }
d9430a32 879
7a5158ef 880 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 881 bss_conf->use_short_slot = use_short_slot;
882 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 883 }
884
885 return changed;
886}
887
f698d856 888static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
e21546a2 889 struct ieee80211_mgd_work *wk,
ae5eb026 890 u32 bss_info_changed)
f0706e82 891{
471b3efd 892 struct ieee80211_local *local = sdata->local;
e21546a2 893 struct ieee80211_bss *bss = wk->bss;
d6f2da5b 894
ae5eb026 895 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 896 /* set timing information */
897 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
898 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
899 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 900
77fdaa12
JB		 901 bss_info_changed |= BSS_CHANGED_BEACON_INT;
902 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
903 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 904
77fdaa12 905 sdata->u.mgd.associated = bss;
e21546a2 906 sdata->u.mgd.old_associate_work = wk;
77fdaa12 907 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 908
b291ba11
JB		 909 /* just to be sure */
910 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
911 IEEE80211_STA_BEACON_POLL);
912
9ac19a90 913 ieee80211_led_assoc(local, 1);
9306102e 914
bda3933a 915 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 916 /*
917 * For now just always ask the driver to update the basic rateset
918 * when we have associated, we aren't checking whether it actually
919 * changed or not.
920 */
ae5eb026 921 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 922
923 /* And the BSSID changed - we're associated now */
924 bss_info_changed |= BSS_CHANGED_BSSID;
925
ae5eb026 926 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 927
056508dc
JB		 928 mutex_lock(&local->iflist_mtx);
929 ieee80211_recalc_ps(local, -1);
930 mutex_unlock(&local->iflist_mtx);
e0cb686f 931
53623f1a 932 netif_start_queue(sdata->dev);
9ac19a90 933 netif_carrier_on(sdata->dev);
f0706e82
JB		 934}
935
77fdaa12
JB		 936static enum rx_mgmt_action __must_check
937ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
938 struct ieee80211_mgd_work *wk)
f0706e82 939{
46900298 940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 941 struct ieee80211_local *local = sdata->local;
46900298 942
77fdaa12
JB		 943 wk->tries++;
944 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 945 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 946 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 947
948 /*
949 * Most likely AP is not in the range so remove the
77fdaa12 950 * bss struct for that AP.
7a947080 951 */
77fdaa12 952 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 953
954 /*
955 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 956 * due to work needing to be done. Hence, queue the STAs work
957 * again for that.
11432379 958 */
42935eca 959 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 960 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 961 }
f0706e82 962
77fdaa12
JB		 963 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
964 sdata->dev->name, wk->bss->cbss.bssid,
965 wk->tries);
f0706e82 966
77fdaa12
JB		 967 /*
968 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 969 * will not answer to direct packet in unassociated state.
970 */
77fdaa12
JB		 971 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
972
973 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 974 run_again(ifmgd, wk->timeout);
9ac19a90 975
77fdaa12 976 return RX_MGMT_NONE;
60f8b39c 977}
f0706e82 978
9ac19a90 979
77fdaa12
JB		 980static enum rx_mgmt_action __must_check
981ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
982 struct ieee80211_mgd_work *wk)
f0706e82 983{
46900298 984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 985 struct ieee80211_local *local = sdata->local;
46900298 986
77fdaa12
JB		 987 wk->tries++;
988 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 989 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 990 " timed out\n",
77fdaa12
JB		 991 sdata->dev->name, wk->bss->cbss.bssid);
992
993 /*
994 * Most likely AP is not in the range so remove the
995 * bss struct for that AP.
996 */
997 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 998
999 /*
1000 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1001 * due to work needing to be done. Hence, queue the STAs work
1002 * again for that.
11432379 1003 */
42935eca 1004 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1005 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1006 }
f0706e82 1007
77fdaa12
JB		 1008 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1009 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1010
1011 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1012 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1013 wk->auth_transaction = 2;
f0706e82 1014
77fdaa12 1015 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1016 run_again(ifmgd, wk->timeout);
9ac19a90 1017
77fdaa12 1018 return RX_MGMT_NONE;
f0706e82
JB		 1019}
1020
e21546a2
JB		 1021static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1022 bool deauth)
aa458d17 1023{
46900298 1024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1025 struct ieee80211_local *local = sdata->local;
1026 struct sta_info *sta;
e0cb686f 1027 u32 changed = 0, config_changed = 0;
b291ba11 1028 u8 bssid[ETH_ALEN];
aa458d17 1029
77fdaa12
JB		 1030 ASSERT_MGD_MTX(ifmgd);
1031
b291ba11
JB		 1032 if (WARN_ON(!ifmgd->associated))
1033 return;
1034
1035 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1036
77fdaa12
JB		 1037 ifmgd->associated = NULL;
1038 memset(ifmgd->bssid, 0, ETH_ALEN);
1039
e21546a2
JB		 1040 if (deauth) {
1041 kfree(ifmgd->old_associate_work);
1042 ifmgd->old_associate_work = NULL;
1043 } else {
1044 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1045
1046 wk->state = IEEE80211_MGD_STATE_IDLE;
1047 list_add(&wk->list, &ifmgd->work_list);
1048 }
1049
77fdaa12
JB		 1050 /*
1051 * we need to commit the associated = NULL change because the
1052 * scan code uses that to determine whether this iface should
1053 * go to/wake up from powersave or not -- and could otherwise
1054 * wake the queues erroneously.
1055 */
1056 smp_mb();
1057
1058 /*
1059 * Thus, we can only afterwards stop the queues -- to account
1060 * for the case where another CPU is finishing a scan at this
1061 * time -- we don't want the scan code to enable queues.
1062 */
aa458d17 1063
53623f1a 1064 netif_stop_queue(sdata->dev);
aa458d17
TW		 1065 netif_carrier_off(sdata->dev);
1066
1fa6f4af 1067 rcu_read_lock();
77fdaa12 1068 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1069 if (sta)
1070 ieee80211_sta_tear_down_BA_sessions(sta);
1071 rcu_read_unlock();
aa458d17 1072
f5e5bf25
TW		 1073 changed |= ieee80211_reset_erp_info(sdata);
1074
f5e5bf25 1075 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1076 changed |= BSS_CHANGED_ASSOC;
1077 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1078
aa837e1d
JB		 1079 ieee80211_set_wmm_default(sdata);
1080
5cff20e6
JB		 1081 ieee80211_recalc_idle(local);
1082
4797938c 1083 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1084 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1085
413ad50a
JB		 1086 /* on the next assoc, re-program HT parameters */
1087 sdata->ht_opmode_valid = false;
1088
a8302de9
VT		 1089 local->power_constr_level = 0;
1090
520eb820
KV		 1091 del_timer_sync(&local->dynamic_ps_timer);
1092 cancel_work_sync(&local->dynamic_ps_enable_work);
1093
e0cb686f
KV		 1094 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1095 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1096 config_changed |= IEEE80211_CONF_CHANGE_PS;
1097 }
ae5eb026 1098
e0cb686f 1099 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1100
1101 /* And the BSSID changed -- not very interesting here */
1102 changed |= BSS_CHANGED_BSSID;
ae5eb026 1103 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1104
1105 rcu_read_lock();
1106
77fdaa12 1107 sta = sta_info_get(local, bssid);
8e268e47
TW		 1108 if (!sta) {
1109 rcu_read_unlock();
1110 return;
1111 }
1112
1113 sta_info_unlink(&sta);
1114
1115 rcu_read_unlock();
1116
1117 sta_info_destroy(sta);
aa458d17 1118}
f0706e82 1119
77fdaa12
JB		 1120static enum rx_mgmt_action __must_check
1121ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1122 struct ieee80211_mgd_work *wk)
f0706e82 1123{
46900298 1124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1125 struct ieee80211_local *local = sdata->local;
46900298 1126
77fdaa12
JB		 1127 wk->tries++;
1128 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1129 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1130 " timed out\n",
77fdaa12
JB		 1131 sdata->dev->name, wk->bss->cbss.bssid);
1132
1133 /*
1134 * Most likely AP is not in the range so remove the
1135 * bss struct for that AP.
1136 */
1137 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1138
11432379
HS		 1139 /*
1140 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1141 * due to work needing to be done. Hence, queue the STAs work
1142 * again for that.
11432379 1143 */
42935eca 1144 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1145 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1146 }
1147
77fdaa12
JB		 1148 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1149 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1150 ieee80211_send_assoc(sdata, wk);
1151
1152 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1153 run_again(ifmgd, wk->timeout);
f0706e82 1154
77fdaa12 1155 return RX_MGMT_NONE;
f0706e82
JB		 1156}
1157
3cf335d5
KV		 1158void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1159 struct ieee80211_hdr *hdr)
1160{
1161 /*
1162 * We can postpone the mgd.timer whenever receiving unicast frames
1163 * from AP because we know that the connection is working both ways
1164 * at that time. But multicast frames (and hence also beacons) must
1165 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1166 * data idle periods for sending the periodic probe request to the
1167 * AP we're connected to.
3cf335d5 1168 */
b291ba11
JB		 1169 if (is_multicast_ether_addr(hdr->addr1))
1170 return;
1171
1172 mod_timer(&sdata->u.mgd.conn_mon_timer,
1173 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1174}
f0706e82 1175
a43abf29
ML		 1176static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1177{
1178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1179 const u8 *ssid;
1180
1181 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1182 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1183 ssid + 2, ssid[1], NULL, 0);
1184
1185 ifmgd->probe_send_count++;
1186 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1187 run_again(ifmgd, ifmgd->probe_timeout);
1188}
1189
b291ba11
JB		 1190static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1191 bool beacon)
04de8381 1192{
04de8381 1193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1194 bool already = false;
34bfc411 1195
0e2b6286
JB		 1196 if (!netif_running(sdata->dev))
1197 return;
1198
91a3bd76
LR		 1199 if (sdata->local->scanning)
1200 return;
1201
77fdaa12
JB		 1202 mutex_lock(&ifmgd->mtx);
1203
1204 if (!ifmgd->associated)
1205 goto out;
1206
a860402d 1207#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1208 if (beacon && net_ratelimit())
1209 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1210 "- sending probe request\n", sdata->dev->name);
a860402d 1211#endif
04de8381 1212
b291ba11
JB		 1213 /*
1214 * The driver/our work has already reported this event or the
1215 * connection monitoring has kicked in and we have already sent
1216 * a probe request. Or maybe the AP died and the driver keeps
1217 * reporting until we disassociate...
1218 *
1219 * In either case we have to ignore the current call to this
1220 * function (except for setting the correct probe reason bit)
1221 * because otherwise we would reset the timer every time and
1222 * never check whether we received a probe response!
1223 */
1224 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1225 IEEE80211_STA_CONNECTION_POLL))
1226 already = true;
1227
1228 if (beacon)
1229 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1230 else
1231 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1232
1233 if (already)
1234 goto out;
1235
4e751843
JB		 1236 mutex_lock(&sdata->local->iflist_mtx);
1237 ieee80211_recalc_ps(sdata->local, -1);
1238 mutex_unlock(&sdata->local->iflist_mtx);
1239
a43abf29
ML		 1240 ifmgd->probe_send_count = 0;
1241 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1242 out:
1243 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1244}
1245
b291ba11
JB		 1246void ieee80211_beacon_loss_work(struct work_struct *work)
1247{
1248 struct ieee80211_sub_if_data *sdata =
1249 container_of(work, struct ieee80211_sub_if_data,
1250 u.mgd.beacon_loss_work);
1251
1252 ieee80211_mgd_probe_ap(sdata, true);
1253}
1254
04de8381
KV		 1255void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1256{
1257 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1258
42935eca 1259 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1260}
1261EXPORT_SYMBOL(ieee80211_beacon_loss);
1262
77fdaa12
JB		 1263static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1264 struct ieee80211_mgd_work *wk)
f0706e82 1265{
77fdaa12 1266 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1267 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1268}
1269
1270
f698d856 1271static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1272 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1273 struct ieee80211_mgmt *mgmt,
1274 size_t len)
1275{
1276 u8 *pos;
1277 struct ieee802_11_elems elems;
1278
f0706e82 1279 pos = mgmt->u.auth.variable;
67a4cce4 1280 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1281 if (!elems.challenge)
f0706e82 1282 return;
77fdaa12 1283 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1284 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1285 wk->bss->cbss.bssid,
1286 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1287 wk->auth_transaction = 4;
fe3d2c3f
JB		 1288}
1289
77fdaa12
JB		 1290static enum rx_mgmt_action __must_check
1291ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1292 struct ieee80211_mgd_work *wk,
1293 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1294{
f0706e82
JB		 1295 u16 auth_alg, auth_transaction, status_code;
1296
77fdaa12
JB		 1297 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1298 return RX_MGMT_NONE;
f0706e82 1299
f4ea83dd 1300 if (len < 24 + 6)
77fdaa12 1301 return RX_MGMT_NONE;
f0706e82 1302
77fdaa12
JB		 1303 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1304 return RX_MGMT_NONE;
f0706e82 1305
77fdaa12
JB		 1306 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1307 return RX_MGMT_NONE;
f0706e82
JB		 1308
1309 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1310 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1311 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1312
77fdaa12
JB		 1313 if (auth_alg != wk->auth_alg ||
1314 auth_transaction != wk->auth_transaction)
1315 return RX_MGMT_NONE;
f0706e82
JB		 1316
1317 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1318 list_del(&wk->list);
1319 kfree(wk);
1320 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1321 }
1322
77fdaa12 1323 switch (wk->auth_alg) {
f0706e82
JB		 1324 case WLAN_AUTH_OPEN:
1325 case WLAN_AUTH_LEAP:
636a5d36 1326 case WLAN_AUTH_FT:
77fdaa12
JB		 1327 ieee80211_auth_completed(sdata, wk);
1328 return RX_MGMT_CFG80211_AUTH;
f0706e82 1329 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1330 if (wk->auth_transaction == 4) {
1331 ieee80211_auth_completed(sdata, wk);
1332 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1333 } else
77fdaa12 1334 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1335 break;
1336 }
77fdaa12
JB		 1337
1338 return RX_MGMT_NONE;
f0706e82
JB		 1339}
1340
1341
77fdaa12
JB		 1342static enum rx_mgmt_action __must_check
1343ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1344 struct ieee80211_mgd_work *wk,
1345 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1346{
46900298 1347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1348 const u8 *bssid = NULL;
f0706e82
JB		 1349 u16 reason_code;
1350
f4ea83dd 1351 if (len < 24 + 2)
77fdaa12 1352 return RX_MGMT_NONE;
f0706e82 1353
77fdaa12
JB		 1354 ASSERT_MGD_MTX(ifmgd);
1355
1356 if (wk)
1357 bssid = wk->bss->cbss.bssid;
1358 else
1359 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1360
1361 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1362
77fdaa12
JB		 1363 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1364 sdata->dev->name, bssid, reason_code);
1365
1366 if (!wk) {
e21546a2 1367 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 1368 } else {
1369 list_del(&wk->list);
1370 kfree(wk);
1371 }
f0706e82 1372
77fdaa12 1373 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1374}
1375
1376
77fdaa12
JB		 1377static enum rx_mgmt_action __must_check
1378ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1379 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1380{
46900298 1381 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1382 u16 reason_code;
1383
f4ea83dd 1384 if (len < 24 + 2)
77fdaa12 1385 return RX_MGMT_NONE;
f0706e82 1386
77fdaa12
JB		 1387 ASSERT_MGD_MTX(ifmgd);
1388
1389 if (WARN_ON(!ifmgd->associated))
1390 return RX_MGMT_NONE;
1391
1392 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1393 return RX_MGMT_NONE;
f0706e82
JB		 1394
1395 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1396
0ff71613
JB		 1397 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1398 sdata->dev->name, mgmt->sa, reason_code);
f0706e82 1399
e21546a2 1400 ieee80211_set_disassoc(sdata, false);
77fdaa12 1401 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1402}
1403
1404
77fdaa12
JB		 1405static enum rx_mgmt_action __must_check
1406ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1407 struct ieee80211_mgd_work *wk,
1408 struct ieee80211_mgmt *mgmt, size_t len,
1409 bool reassoc)
f0706e82 1410{
46900298 1411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1412 struct ieee80211_local *local = sdata->local;
8318d78a 1413 struct ieee80211_supported_band *sband;
f0706e82 1414 struct sta_info *sta;
881d948c 1415 u32 rates, basic_rates;
f0706e82
JB		 1416 u16 capab_info, status_code, aid;
1417 struct ieee802_11_elems elems;
bda3933a 1418 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1419 u8 *pos;
ae5eb026 1420 u32 changed = 0;
f0706e82 1421 int i, j;
ddf4ac53 1422 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1423 u16 ap_ht_cap_flags;
f0706e82 1424
77fdaa12
JB		 1425 /*
1426 * AssocResp and ReassocResp have identical structure, so process both
1427 * of them in this function.
1428 */
f0706e82 1429
f4ea83dd 1430 if (len < 24 + 6)
77fdaa12 1431 return RX_MGMT_NONE;
f0706e82 1432
77fdaa12
JB		 1433 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1434 return RX_MGMT_NONE;
f0706e82
JB		 1435
1436 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1437 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1438 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1439
0c68ae26 1440 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1441 "status=%d aid=%d)\n",
0c68ae26 1442 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1443 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1444
63a5ab82
JM		 1445 pos = mgmt->u.assoc_resp.variable;
1446 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1447
1448 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1449 elems.timeout_int && elems.timeout_int_len == 5 &&
1450 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1451 u32 tu, ms;
f797eb7e 1452 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1453 ms = tu * 1024 / 1000;
1454 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1455 "comeback duration %u TU (%u ms)\n",
1456 sdata->dev->name, tu, ms);
77fdaa12 1457 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1458 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1459 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1460 return RX_MGMT_NONE;
63a5ab82
JM		 1461 }
1462
f0706e82
JB		 1463 if (status_code != WLAN_STATUS_SUCCESS) {
1464 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1465 sdata->dev->name, status_code);
2ef6e444 1466 wk->state = IEEE80211_MGD_STATE_IDLE;
77fdaa12 1467 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1468 }
1469
1dd84aa2
JB		 1470 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1471 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1472 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1473 aid &= ~(BIT(15) | BIT(14));
1474
f0706e82
JB		 1475 if (!elems.supp_rates) {
1476 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1477 sdata->dev->name);
77fdaa12 1478 return RX_MGMT_NONE;
f0706e82
JB		 1479 }
1480
f698d856 1481 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1482 ifmgd->aid = aid;
f0706e82 1483
d0709a65
JB		 1484 rcu_read_lock();
1485
f0706e82 1486 /* Add STA entry for the AP */
77fdaa12 1487 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1488 if (!sta) {
ddf4ac53 1489 newsta = true;
d0709a65 1490
77fdaa12
JB		 1491 rcu_read_unlock();
1492
1493 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1494 if (!sta) {
1495 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1496 " the AP\n", sdata->dev->name);
77fdaa12 1497 return RX_MGMT_NONE;
f0706e82 1498 }
f709fc69 1499
77fdaa12
JB		 1500 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1501 WLAN_STA_ASSOC_AP);
1502 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1503 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1504
77fdaa12
JB		 1505 rcu_read_lock();
1506 }
05e5e883 1507
60f8b39c
JB		 1508 rates = 0;
1509 basic_rates = 0;
1510 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1511
60f8b39c
JB		 1512 for (i = 0; i < elems.supp_rates_len; i++) {
1513 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1514 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1515
60f8b39c
JB		 1516 if (rate > 110)
1517 have_higher_than_11mbit = true;
1518
1519 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1520 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1521 rates |= BIT(j);
d61272cb
TW		 1522 if (is_basic)
1523 basic_rates |= BIT(j);
1524 break;
1525 }
f709fc69 1526 }
f709fc69
LCC		 1527 }
1528
60f8b39c
JB		 1529 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1530 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1531 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1532
60f8b39c
JB		 1533 if (rate > 110)
1534 have_higher_than_11mbit = true;
f0706e82 1535
60f8b39c 1536 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1537 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1538 rates |= BIT(j);
d61272cb
TW		 1539 if (is_basic)
1540 basic_rates |= BIT(j);
1541 break;
1542 }
60f8b39c 1543 }
1ebebea8 1544 }
f0706e82 1545
323ce79a 1546 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1547 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1548
1549 /* cf. IEEE 802.11 9.2.12 */
1550 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1551 have_higher_than_11mbit)
1552 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1553 else
1554 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1555
ab1faead 1556 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1557 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1558 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1559
1560 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1561
4b7679a5 1562 rate_control_rate_init(sta);
f0706e82 1563
46900298 1564 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1565 set_sta_flags(sta, WLAN_STA_MFP);
1566
ddf4ac53 1567 if (elems.wmm_param)
60f8b39c 1568 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1569
1570 if (newsta) {
1571 int err = sta_info_insert(sta);
1572 if (err) {
1573 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1574 " the AP (error %d)\n", sdata->dev->name, err);
1575 rcu_read_unlock();
77fdaa12 1576 return RX_MGMT_NONE;
ddf4ac53
JB		 1577 }
1578 }
1579
1580 rcu_read_unlock();
1581
1582 if (elems.wmm_param)
46900298 1583 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1584 elems.wmm_param_len);
aa837e1d
JB		 1585 else
1586 ieee80211_set_wmm_default(sdata);
f0706e82 1587
ae5eb026 1588 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1589 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1590 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1591 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1592 wk->bss->cbss.bssid,
ae5eb026
JB		 1593 ap_ht_cap_flags);
1594
056508dc
JB		 1595 /* delete work item -- must be before set_associated for PS */
1596 list_del(&wk->list);
1597
60f8b39c
JB		 1598 /* set AID and assoc capability,
1599 * ieee80211_set_associated() will tell the driver */
1600 bss_conf->aid = aid;
1601 bss_conf->assoc_capability = capab_info;
e21546a2
JB		 1602 /* this will take ownership of wk */
1603 ieee80211_set_associated(sdata, wk, changed);
f0706e82 1604
15b7b062 1605 /*
b291ba11
JB		 1606 * Start timer to probe the connection to the AP now.
1607 * Also start the timer that will detect beacon loss.
15b7b062 1608 */
b291ba11
JB		 1609 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1610 mod_beacon_timer(sdata);
15b7b062 1611
77fdaa12 1612 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1613}
1614
1615
98c8fccf
JB		 1616static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1617 struct ieee80211_mgmt *mgmt,
1618 size_t len,
1619 struct ieee80211_rx_status *rx_status,
1620 struct ieee802_11_elems *elems,
1621 bool beacon)
1622{
1623 struct ieee80211_local *local = sdata->local;
1624 int freq;
c2b13452 1625 struct ieee80211_bss *bss;
98c8fccf 1626 struct ieee80211_channel *channel;
98c8fccf
JB		 1627
1628 if (elems->ds_params && elems->ds_params_len == 1)
1629 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1630 else
1631 freq = rx_status->freq;
1632
1633 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1634
1635 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1636 return;
1637
98c8fccf 1638 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1639 channel, beacon);
77fdaa12
JB		 1640 if (bss)
1641 ieee80211_rx_bss_put(local, bss);
1642
1643 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1644 return;
1645
c481ec97 1646 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1647 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1648 ETH_ALEN) == 0)) {
c481ec97
S		 1649 struct ieee80211_channel_sw_ie *sw_elem =
1650 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1651 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1652 }
f0706e82
JB		 1653}
1654
1655
f698d856 1656static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1657 struct ieee80211_mgd_work *wk,
1658 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1659 struct ieee80211_rx_status *rx_status)
1660{
15b7b062 1661 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1662 size_t baselen;
1663 struct ieee802_11_elems elems;
1664
15b7b062
KV		 1665 ifmgd = &sdata->u.mgd;
1666
77fdaa12
JB		 1667 ASSERT_MGD_MTX(ifmgd);
1668
8e7cdbb6
TW		 1669 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1670 return; /* ignore ProbeResp to foreign address */
1671
ae6a44e3
EK		 1672 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1673 if (baselen > len)
1674 return;
1675
1676 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1677 &elems);
1678
98c8fccf 1679 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1680
1681 /* direct probe may be part of the association flow */
77fdaa12 1682 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
0ff71613 1683 printk(KERN_DEBUG "%s: direct probe responded\n",
9859b81e 1684 sdata->dev->name);
77fdaa12
JB		 1685 wk->tries = 0;
1686 wk->state = IEEE80211_MGD_STATE_AUTH;
1687 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1688 }
15b7b062 1689
77fdaa12
JB		 1690 if (ifmgd->associated &&
1691 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1692 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1693 IEEE80211_STA_CONNECTION_POLL)) {
1694 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1695 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1696 mutex_lock(&sdata->local->iflist_mtx);
1697 ieee80211_recalc_ps(sdata->local, -1);
1698 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1699 /*
1700 * We've received a probe response, but are not sure whether
1701 * we have or will be receiving any beacons or data, so let's
1702 * schedule the timers again, just in case.
1703 */
1704 mod_beacon_timer(sdata);
1705 mod_timer(&ifmgd->conn_mon_timer,
1706 round_jiffies_up(jiffies +
1707 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1708 }
f0706e82
JB		 1709}
1710
d91f36db
JB		 1711/*
1712 * This is the canonical list of information elements we care about,
1713 * the filter code also gives us all changes to the Microsoft OUI
1714 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1715 *
1716 * We implement beacon filtering in software since that means we can
1717 * avoid processing the frame here and in cfg80211, and userspace
1718 * will not be able to tell whether the hardware supports it or not.
1719 *
1720 * XXX: This list needs to be dynamic -- userspace needs to be able to
1721 * add items it requires. It also needs to be able to tell us to
1722 * look out for other vendor IEs.
1723 */
1724static const u64 care_about_ies =
1d4df3a5
JB		 1725 (1ULL << WLAN_EID_COUNTRY) |
1726 (1ULL << WLAN_EID_ERP_INFO) |
1727 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1728 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1729 (1ULL << WLAN_EID_HT_CAPABILITY) |
1730 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1731
f698d856 1732static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1733 struct ieee80211_mgmt *mgmt,
1734 size_t len,
1735 struct ieee80211_rx_status *rx_status)
1736{
d91f36db 1737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1738 size_t baselen;
1739 struct ieee802_11_elems elems;
f698d856 1740 struct ieee80211_local *local = sdata->local;
471b3efd 1741 u32 changed = 0;
d91f36db 1742 bool erp_valid, directed_tim = false;
7a5158ef 1743 u8 erp_value = 0;
d91f36db 1744 u32 ncrc;
77fdaa12
JB		 1745 u8 *bssid;
1746
1747 ASSERT_MGD_MTX(ifmgd);
f0706e82 1748
ae6a44e3
EK		 1749 /* Process beacon from the current BSS */
1750 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1751 if (baselen > len)
1752 return;
1753
d91f36db 1754 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1755 return;
f0706e82 1756
b291ba11
JB		 1757 /*
1758 * We might have received a number of frames, among them a
1759 * disassoc frame and a beacon...
1760 */
1761 if (!ifmgd->associated)
77fdaa12
JB		 1762 return;
1763
1764 bssid = ifmgd->associated->cbss.bssid;
1765
b291ba11
JB		 1766 /*
1767 * And in theory even frames from a different AP we were just
1768 * associated to a split-second ago!
1769 */
1770 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1771 return;
1772
b291ba11 1773 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1774#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1775 if (net_ratelimit()) {
1776 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1777 "to a received beacon\n", sdata->dev->name);
1778 }
1779#endif
b291ba11 1780 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1781 mutex_lock(&local->iflist_mtx);
1782 ieee80211_recalc_ps(local, -1);
1783 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1784 }
1785
b291ba11
JB		 1786 /*
1787 * Push the beacon loss detection into the future since
1788 * we are processing a beacon from the AP just now.
1789 */
1790 mod_beacon_timer(sdata);
1791
d91f36db
JB		 1792 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1793 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1794 len - baselen, &elems,
1795 care_about_ies, ncrc);
1796
1797 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1798 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1799 ifmgd->aid);
d91f36db 1800
30196673
JM		 1801 if (ncrc != ifmgd->beacon_crc) {
1802 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1803 true);
d91f36db 1804
30196673
JM		 1805 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1806 elems.wmm_param_len);
1807 }
fe3fa827 1808
25c9c875 1809 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1810 if (directed_tim) {
572e0012
KV		 1811 if (local->hw.conf.dynamic_ps_timeout > 0) {
1812 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1813 ieee80211_hw_config(local,
1814 IEEE80211_CONF_CHANGE_PS);
1815 ieee80211_send_nullfunc(local, sdata, 0);
1816 } else {
1817 local->pspolling = true;
1818
1819 /*
1820 * Here is assumed that the driver will be
1821 * able to send ps-poll frame and receive a
1822 * response even though power save mode is
1823 * enabled, but some drivers might require
1824 * to disable power save here. This needs
1825 * to be investigated.
1826 */
1827 ieee80211_send_pspoll(local, sdata);
1828 }
a97b77b9
VN		 1829 }
1830 }
7a5158ef 1831
30196673
JM		 1832 if (ncrc == ifmgd->beacon_crc)
1833 return;
1834 ifmgd->beacon_crc = ncrc;
1835
7a5158ef
JB		 1836 if (elems.erp_info && elems.erp_info_len >= 1) {
1837 erp_valid = true;
1838 erp_value = elems.erp_info[0];
1839 } else {
1840 erp_valid = false;
50c4afb9 1841 }
7a5158ef
JB		 1842 changed |= ieee80211_handle_bss_capability(sdata,
1843 le16_to_cpu(mgmt->u.beacon.capab_info),
1844 erp_valid, erp_value);
f0706e82 1845
d3c990fb 1846
53d6f81c 1847 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1848 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1849 struct sta_info *sta;
1850 struct ieee80211_supported_band *sband;
1851 u16 ap_ht_cap_flags;
1852
1853 rcu_read_lock();
1854
77fdaa12
JB		 1855 sta = sta_info_get(local, bssid);
1856 if (WARN_ON(!sta)) {
ae5eb026
JB		 1857 rcu_read_unlock();
1858 return;
1859 }
1860
1861 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1862
1863 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1864 elems.ht_cap_elem, &sta->sta.ht_cap);
1865
1866 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1867
1868 rcu_read_unlock();
1869
1870 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1871 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1872 }
1873
8b19e6ca 1874 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1875 if (elems.country_elem) {
a8302de9
VT		 1876 /* TODO: IBSS also needs this */
1877 if (elems.pwr_constr_elem)
1878 ieee80211_handle_pwr_constr(sdata,
1879 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1880 elems.pwr_constr_elem,
1881 elems.pwr_constr_elem_len);
3f2355cb
LR		 1882 }
1883
471b3efd 1884 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1885}
1886
46900298 1887ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1888 struct sk_buff *skb)
f0706e82 1889{
f698d856 1890 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1891 struct ieee80211_mgmt *mgmt;
1892 u16 fc;
1893
1894 if (skb->len < 24)
46900298 1895 return RX_DROP_MONITOR;
f0706e82
JB		 1896
1897 mgmt = (struct ieee80211_mgmt *) skb->data;
1898 fc = le16_to_cpu(mgmt->frame_control);
1899
1900 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1901 case IEEE80211_STYPE_PROBE_RESP:
1902 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1903 case IEEE80211_STYPE_AUTH:
1904 case IEEE80211_STYPE_ASSOC_RESP:
1905 case IEEE80211_STYPE_REASSOC_RESP:
1906 case IEEE80211_STYPE_DEAUTH:
1907 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1908 case IEEE80211_STYPE_ACTION:
46900298 1909 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1910 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1911 return RX_QUEUED;
f0706e82
JB		 1912 }
1913
46900298 1914 return RX_DROP_MONITOR;
f0706e82
JB		 1915}
1916
f698d856 1917static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1918 struct sk_buff *skb)
1919{
77fdaa12 1920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1921 struct ieee80211_rx_status *rx_status;
f0706e82 1922 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1923 struct ieee80211_mgd_work *wk;
1924 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1925 u16 fc;
1926
f0706e82
JB		 1927 rx_status = (struct ieee80211_rx_status *) skb->cb;
1928 mgmt = (struct ieee80211_mgmt *) skb->data;
1929 fc = le16_to_cpu(mgmt->frame_control);
1930
77fdaa12
JB		 1931 mutex_lock(&ifmgd->mtx);
1932
1933 if (ifmgd->associated &&
1934 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1935 ETH_ALEN) == 0) {
1936 switch (fc & IEEE80211_FCTL_STYPE) {
1937 case IEEE80211_STYPE_BEACON:
1938 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1939 rx_status);
1940 break;
1941 case IEEE80211_STYPE_PROBE_RESP:
1942 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1943 skb->len, rx_status);
1944 break;
1945 case IEEE80211_STYPE_DEAUTH:
1946 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1947 mgmt, skb->len);
1948 break;
1949 case IEEE80211_STYPE_DISASSOC:
1950 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1951 break;
1952 case IEEE80211_STYPE_ACTION:
1953 /* XXX: differentiate, can only happen for CSA now! */
1954 ieee80211_sta_process_chanswitch(sdata,
1955 &mgmt->u.action.u.chan_switch.sw_elem,
1956 ifmgd->associated);
1957 break;
1958 }
1959 mutex_unlock(&ifmgd->mtx);
1960
1961 switch (rma) {
1962 case RX_MGMT_NONE:
1963 /* no action */
1964 break;
1965 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1966 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1967 break;
1968 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1969 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1970 break;
1971 default:
1972 WARN(1, "unexpected: %d", rma);
1973 }
1974 goto out;
1975 }
1976
1977 list_for_each_entry(wk, &ifmgd->work_list, list) {
1978 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1979 continue;
1980
1981 switch (fc & IEEE80211_FCTL_STYPE) {
1982 case IEEE80211_STYPE_PROBE_RESP:
1983 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1984 rx_status);
1985 break;
1986 case IEEE80211_STYPE_AUTH:
1987 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1988 break;
1989 case IEEE80211_STYPE_ASSOC_RESP:
1990 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1991 skb->len, false);
1992 break;
1993 case IEEE80211_STYPE_REASSOC_RESP:
1994 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1995 skb->len, true);
1996 break;
1997 case IEEE80211_STYPE_DEAUTH:
1998 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1999 skb->len);
2000 break;
2001 }
2002 /*
2003 * We've processed this frame for that work, so it can't
2004 * belong to another work struct.
2005 * NB: this is also required for correctness because the
2006 * called functions can free 'wk', and for 'rma'!
2007 */
46900298 2008 break;
77fdaa12
JB		 2009 }
2010
2011 mutex_unlock(&ifmgd->mtx);
2012
2013 switch (rma) {
2014 case RX_MGMT_NONE:
2015 /* no action */
46900298 2016 break;
77fdaa12 2017 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2018 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2019 break;
77fdaa12 2020 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2021 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2022 break;
8d8b261a 2023 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2024 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
8d8b261a 2025 break;
77fdaa12
JB		 2026 default:
2027 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2028 }
2029
77fdaa12 2030 out:
f0706e82
JB		 2031 kfree_skb(skb);
2032}
2033
9c6bd790 2034static void ieee80211_sta_timer(unsigned long data)
f0706e82 2035{
60f8b39c
JB		 2036 struct ieee80211_sub_if_data *sdata =
2037 (struct ieee80211_sub_if_data *) data;
46900298 2038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2039 struct ieee80211_local *local = sdata->local;
f0706e82 2040
5bb644a0
JB		 2041 if (local->quiescing) {
2042 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2043 return;
2044 }
2045
42935eca 2046 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2047}
2048
9c6bd790
JB		 2049static void ieee80211_sta_work(struct work_struct *work)
2050{
2051 struct ieee80211_sub_if_data *sdata =
46900298 2052 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2053 struct ieee80211_local *local = sdata->local;
46900298 2054 struct ieee80211_if_managed *ifmgd;
9c6bd790 2055 struct sk_buff *skb;
77fdaa12
JB		 2056 struct ieee80211_mgd_work *wk, *tmp;
2057 LIST_HEAD(free_work);
2058 enum rx_mgmt_action rma;
2059 bool anybusy = false;
9c6bd790
JB		 2060
2061 if (!netif_running(sdata->dev))
2062 return;
2063
fbe9c429 2064 if (local->scanning)
9c6bd790
JB		 2065 return;
2066
46900298 2067 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2068 return;
5bb644a0
JB		 2069
2070 /*
42935eca
LR		 2071 * ieee80211_queue_work() should have picked up most cases,
2072 * here we'll pick the the rest.
5bb644a0 2073 */
42935eca
LR		 2074 if (WARN(local->suspended, "STA MLME work scheduled while "
2075 "going to suspend\n"))
5bb644a0
JB		 2076 return;
2077
46900298 2078 ifmgd = &sdata->u.mgd;
f0706e82 2079
77fdaa12 2080 /* first process frames to avoid timing out while a frame is pending */
46900298 2081 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2082 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2083
77fdaa12
JB		 2084 /* then process the rest of the work */
2085 mutex_lock(&ifmgd->mtx);
2086
b291ba11
JB		 2087 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2088 IEEE80211_STA_CONNECTION_POLL) &&
2089 ifmgd->associated) {
a43abf29
ML		 2090 u8 bssid[ETH_ALEN];
2091
2092 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2093 if (time_is_after_jiffies(ifmgd->probe_timeout))
2094 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2095
2096 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2097#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2098 printk(KERN_DEBUG "No probe response from AP %pM"
2099 " after %dms, try %d\n", bssid,
2100 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2101 ifmgd->probe_send_count);
2102#endif
2103 ieee80211_mgd_probe_ap_send(sdata);
2104 } else {
b291ba11
JB		 2105 /*
2106 * We actually lost the connection ... or did we?
2107 * Let's make sure!
2108 */
2109 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2110 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2111 printk(KERN_DEBUG "No probe response from AP %pM"
2112 " after %dms, disconnecting.\n",
2113 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e21546a2 2114 ieee80211_set_disassoc(sdata, true);
b291ba11
JB		 2115 mutex_unlock(&ifmgd->mtx);
2116 /*
2117 * must be outside lock due to cfg80211,
2118 * but that's not a problem.
2119 */
2120 ieee80211_send_deauth_disassoc(sdata, bssid,
2121 IEEE80211_STYPE_DEAUTH,
2122 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2123 NULL);
2124 mutex_lock(&ifmgd->mtx);
2125 }
2126 }
2127
f0706e82 2128
77fdaa12
JB		 2129 ieee80211_recalc_idle(local);
2130
77fdaa12 2131 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2132 if (time_is_after_jiffies(wk->timeout)) {
2133 /*
2134 * This work item isn't supposed to be worked on
2135 * right now, but take care to adjust the timer
2136 * properly.
2137 */
2138 run_again(ifmgd, wk->timeout);
77fdaa12 2139 continue;
ca386f31 2140 }
5cff20e6 2141
77fdaa12
JB		 2142 switch (wk->state) {
2143 default:
2144 WARN_ON(1);
2145 /* fall through */
2146 case IEEE80211_MGD_STATE_IDLE:
2147 /* nothing */
2148 rma = RX_MGMT_NONE;
2149 break;
2150 case IEEE80211_MGD_STATE_PROBE:
2151 rma = ieee80211_direct_probe(sdata, wk);
2152 break;
2153 case IEEE80211_MGD_STATE_AUTH:
2154 rma = ieee80211_authenticate(sdata, wk);
2155 break;
2156 case IEEE80211_MGD_STATE_ASSOC:
2157 rma = ieee80211_associate(sdata, wk);
2158 break;
2159 }
2160
2161 switch (rma) {
2162 case RX_MGMT_NONE:
2163 /* no action required */
2164 break;
2165 case RX_MGMT_CFG80211_AUTH_TO:
2166 case RX_MGMT_CFG80211_ASSOC_TO:
2167 list_del(&wk->list);
2168 list_add(&wk->list, &free_work);
2169 wk->tries = rma; /* small abuse but only local */
2170 break;
2171 default:
2172 WARN(1, "unexpected: %d", rma);
2173 }
2174 }
2175
5bf6fcc2
JM		 2176 list_for_each_entry(wk, &ifmgd->work_list, list) {
2177 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2178 anybusy = true;
2179 break;
2180 }
2181 }
2182 if (!anybusy &&
2183 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2184 ieee80211_queue_delayed_work(&local->hw,
2185 &local->scan_work,
2186 round_jiffies_relative(0));
2187
77fdaa12
JB		 2188 mutex_unlock(&ifmgd->mtx);
2189
2190 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2191 switch (wk->tries) {
2192 case RX_MGMT_CFG80211_AUTH_TO:
2193 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2194 wk->bss->cbss.bssid);
77fdaa12
JB		 2195 break;
2196 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2197 cfg80211_send_assoc_timeout(sdata->dev,
2198 wk->bss->cbss.bssid);
77fdaa12
JB		 2199 break;
2200 default:
2201 WARN(1, "unexpected: %d", wk->tries);
2202 }
2203
2204 list_del(&wk->list);
2205 kfree(wk);
9c6bd790 2206 }
77fdaa12
JB		 2207
2208 ieee80211_recalc_idle(local);
f0706e82
JB		 2209}
2210
b291ba11
JB		 2211static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2212{
2213 struct ieee80211_sub_if_data *sdata =
2214 (struct ieee80211_sub_if_data *) data;
2215 struct ieee80211_local *local = sdata->local;
2216
2217 if (local->quiescing)
2218 return;
2219
42935eca 2220 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2221}
2222
2223static void ieee80211_sta_conn_mon_timer(unsigned long data)
2224{
2225 struct ieee80211_sub_if_data *sdata =
2226 (struct ieee80211_sub_if_data *) data;
2227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2228 struct ieee80211_local *local = sdata->local;
2229
2230 if (local->quiescing)
2231 return;
2232
42935eca 2233 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2234}
2235
2236static void ieee80211_sta_monitor_work(struct work_struct *work)
2237{
2238 struct ieee80211_sub_if_data *sdata =
2239 container_of(work, struct ieee80211_sub_if_data,
2240 u.mgd.monitor_work);
2241
2242 ieee80211_mgd_probe_ap(sdata, false);
2243}
2244
9c6bd790
JB		 2245static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2246{
ad935687 2247 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2248 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2249 IEEE80211_STA_CONNECTION_POLL);
ad935687 2250
b291ba11 2251 /* let's probe the connection once */
42935eca 2252 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2253 &sdata->u.mgd.monitor_work);
2254 /* and do all the other regular work too */
42935eca 2255 ieee80211_queue_work(&sdata->local->hw,
46900298 2256 &sdata->u.mgd.work);
ad935687 2257 }
9c6bd790 2258}
f0706e82 2259
5bb644a0
JB		 2260#ifdef CONFIG_PM
2261void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2262{
2263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2264
2265 /*
2266 * we need to use atomic bitops for the running bits
2267 * only because both timers might fire at the same
2268 * time -- the code here is properly synchronised.
2269 */
2270
2271 cancel_work_sync(&ifmgd->work);
2272 cancel_work_sync(&ifmgd->beacon_loss_work);
2273 if (del_timer_sync(&ifmgd->timer))
2274 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2275
2276 cancel_work_sync(&ifmgd->chswitch_work);
2277 if (del_timer_sync(&ifmgd->chswitch_timer))
2278 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2279
2280 cancel_work_sync(&ifmgd->monitor_work);
2281 /* these will just be re-established on connection */
2282 del_timer_sync(&ifmgd->conn_mon_timer);
2283 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2284}
2285
2286void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2287{
2288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289
2290 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2291 add_timer(&ifmgd->timer);
2292 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2293 add_timer(&ifmgd->chswitch_timer);
2294}
2295#endif
2296
9c6bd790
JB		 2297/* interface setup */
2298void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2299{
46900298 2300 struct ieee80211_if_managed *ifmgd;
988c0f72 2301
46900298
JB		 2302 ifmgd = &sdata->u.mgd;
2303 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2304 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2305 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2306 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2307 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2308 (unsigned long) sdata);
b291ba11
JB		 2309 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2310 (unsigned long) sdata);
2311 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2312 (unsigned long) sdata);
46900298 2313 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2314 (unsigned long) sdata);
46900298 2315 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2316
77fdaa12
JB		 2317 INIT_LIST_HEAD(&ifmgd->work_list);
2318
46900298 2319 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2320 ifmgd->flags = 0;
176be728 2321 if (sdata->local->hw.queues >= 4)
46900298 2322 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2323
77fdaa12 2324 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2325}
2326
77fdaa12
JB		 2327/* scan finished notification */
2328void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2329{
77fdaa12 2330 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2331
77fdaa12
JB		 2332 /* Restart STA timers */
2333 rcu_read_lock();
2334 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2335 ieee80211_restart_sta_timer(sdata);
2336 rcu_read_unlock();
2337}
60f8b39c 2338
77fdaa12
JB		 2339int ieee80211_max_network_latency(struct notifier_block *nb,
2340 unsigned long data, void *dummy)
2341{
2342 s32 latency_usec = (s32) data;
2343 struct ieee80211_local *local =
2344 container_of(nb, struct ieee80211_local,
2345 network_latency_notifier);
1fa6f4af 2346
77fdaa12
JB		 2347 mutex_lock(&local->iflist_mtx);
2348 ieee80211_recalc_ps(local, latency_usec);
2349 mutex_unlock(&local->iflist_mtx);
dfe67012 2350
77fdaa12 2351 return 0;
9c6bd790
JB		 2352}
2353
77fdaa12
JB		 2354/* config hooks */
2355int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2356 struct cfg80211_auth_request *req)
9c6bd790 2357{
46900298 2358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2359 const u8 *ssid;
2360 struct ieee80211_mgd_work *wk;
2361 u16 auth_alg;
9c6bd790 2362
77fdaa12
JB		 2363 switch (req->auth_type) {
2364 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2365 auth_alg = WLAN_AUTH_OPEN;
2366 break;
2367 case NL80211_AUTHTYPE_SHARED_KEY:
2368 auth_alg = WLAN_AUTH_SHARED_KEY;
2369 break;
2370 case NL80211_AUTHTYPE_FT:
2371 auth_alg = WLAN_AUTH_FT;
2372 break;
2373 case NL80211_AUTHTYPE_NETWORK_EAP:
2374 auth_alg = WLAN_AUTH_LEAP;
2375 break;
2376 default:
2377 return -EOPNOTSUPP;
60f8b39c 2378 }
77fdaa12
JB		 2379
2380 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2381 if (!wk)
9c6bd790 2382 return -ENOMEM;
77fdaa12
JB		 2383
2384 wk->bss = (void *)req->bss;
2385
2386 if (req->ie && req->ie_len) {
2387 memcpy(wk->ie, req->ie, req->ie_len);
2388 wk->ie_len = req->ie_len;
9c6bd790 2389 }
77fdaa12 2390
fffd0934
JB		 2391 if (req->key && req->key_len) {
2392 wk->key_len = req->key_len;
2393 wk->key_idx = req->key_idx;
2394 memcpy(wk->key, req->key, req->key_len);
2395 }
2396
77fdaa12
JB		 2397 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2398 memcpy(wk->ssid, ssid + 2, ssid[1]);
2399 wk->ssid_len = ssid[1];
2400
2401 wk->state = IEEE80211_MGD_STATE_PROBE;
2402 wk->auth_alg = auth_alg;
48531847 2403 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2404
2405 /*
2406 * XXX: if still associated need to tell AP that we're going
2407 * to sleep and then change channel etc.
2408 */
2409 sdata->local->oper_channel = req->bss->channel;
2410 ieee80211_hw_config(sdata->local, 0);
2411
2412 mutex_lock(&ifmgd->mtx);
2413 list_add(&wk->list, &sdata->u.mgd.work_list);
2414 mutex_unlock(&ifmgd->mtx);
2415
42935eca 2416 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2417 return 0;
60f8b39c
JB		 2418}
2419
77fdaa12
JB		 2420int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2421 struct cfg80211_assoc_request *req)
f0706e82 2422{
77fdaa12
JB		 2423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2424 struct ieee80211_mgd_work *wk, *found = NULL;
2425 int i, err;
f0706e82 2426
77fdaa12
JB		 2427 mutex_lock(&ifmgd->mtx);
2428
2429 list_for_each_entry(wk, &ifmgd->work_list, list) {
2430 if (&wk->bss->cbss == req->bss &&
2431 wk->state == IEEE80211_MGD_STATE_IDLE) {
2432 found = wk;
2433 break;
2434 }
2435 }
2436
2437 if (!found) {
2438 err = -ENOLINK;
2439 goto out;
2440 }
2441
2442 list_del(&found->list);
2443
2444 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2445 if (!wk) {
2446 list_add(&found->list, &ifmgd->work_list);
2447 err = -ENOMEM;
2448 goto out;
2449 }
2450
2451 list_add(&wk->list, &ifmgd->work_list);
2452
2453 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2454
2455 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2456 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2457 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2458 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2459 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2460
2461 sdata->local->oper_channel = req->bss->channel;
2462 ieee80211_hw_config(sdata->local, 0);
2463
2464 if (req->ie && req->ie_len) {
2465 memcpy(wk->ie, req->ie, req->ie_len);
2466 wk->ie_len = req->ie_len;
2467 } else
2468 wk->ie_len = 0;
2469
2470 if (req->prev_bssid)
2471 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2472
2473 wk->state = IEEE80211_MGD_STATE_ASSOC;
2474 wk->tries = 0;
48531847 2475 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2476
2477 if (req->use_mfp) {
2478 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2479 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2480 } else {
2481 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2482 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2483 }
2484
2485 if (req->crypto.control_port)
2486 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2487 else
2488 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2489
42935eca 2490 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2491
2492 err = 0;
2493
2494 out:
2495 mutex_unlock(&ifmgd->mtx);
2496 return err;
f0706e82
JB		 2497}
2498
77fdaa12 2499int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2500 struct cfg80211_deauth_request *req,
2501 void *cookie)
f0706e82 2502{
46900298 2503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2504 struct ieee80211_mgd_work *wk;
2505 const u8 *bssid = NULL;
f0706e82 2506
77fdaa12
JB		 2507 mutex_lock(&ifmgd->mtx);
2508
2509 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2510 bssid = req->bss->bssid;
e21546a2 2511 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 2512 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2513 if (&wk->bss->cbss == req->bss) {
2514 bssid = req->bss->bssid;
2515 list_del(&wk->list);
2516 kfree(wk);
2517 break;
2518 }
2519 }
f0706e82 2520
8d8b261a
JB		 2521 /*
2522 * cfg80211 should catch this ... but it's racy since
2523 * we can receive a deauth frame, process it, hand it
2524 * to cfg80211 while that's in a locked section already
2525 * trying to tell us that the user wants to disconnect.
2526 */
2527 if (!bssid) {
77fdaa12 2528 mutex_unlock(&ifmgd->mtx);
46900298 2529 return -ENOLINK;
77fdaa12
JB		 2530 }
2531
2532 mutex_unlock(&ifmgd->mtx);
2533
0ff71613
JB		 2534 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2535 sdata->dev->name, bssid, req->reason_code);
2536
77fdaa12 2537 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2538 IEEE80211_STYPE_DEAUTH, req->reason_code,
2539 cookie);
f0706e82 2540
f0706e82
JB		 2541 return 0;
2542}
84363e6e 2543
77fdaa12 2544int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2545 struct cfg80211_disassoc_request *req,
2546 void *cookie)
9c6bd790 2547{
77fdaa12 2548 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2549
77fdaa12 2550 mutex_lock(&ifmgd->mtx);
10f644a4 2551
8d8b261a
JB		 2552 /*
2553 * cfg80211 should catch this ... but it's racy since
2554 * we can receive a disassoc frame, process it, hand it
2555 * to cfg80211 while that's in a locked section already
2556 * trying to tell us that the user wants to disconnect.
2557 */
2558 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2559 mutex_unlock(&ifmgd->mtx);
2560 return -ENOLINK;
2561 }
2562
0ff71613
JB		 2563 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2564 sdata->dev->name, req->bss->bssid, req->reason_code);
2565
e21546a2 2566 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2567
2568 mutex_unlock(&ifmgd->mtx);
10f644a4 2569
77fdaa12 2570 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2571 IEEE80211_STYPE_DISASSOC, req->reason_code,
2572 cookie);
10f644a4
JB		 2573 return 0;
2574}
Linux kernel - Deliverables
This page took 0.522684 seconds and 5 git commands to generate.