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mac80211: Retry probe request few times
[mirror_ubuntu-zesty-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
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 */
45#define IEEE80211_CONNECTION_IDLE_TIME (2 * HZ)
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 */
51#define IEEE80211_PROBE_WAIT (HZ / 5)
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)
667503dd 461 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
53b46b84 462 else
667503dd 463 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
46900298 464 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 465}
466
572e0012
KV		 467void ieee80211_send_pspoll(struct ieee80211_local *local,
468 struct ieee80211_sub_if_data *sdata)
469{
46900298 470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 471 struct ieee80211_pspoll *pspoll;
472 struct sk_buff *skb;
473 u16 fc;
474
475 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
476 if (!skb) {
477 printk(KERN_DEBUG "%s: failed to allocate buffer for "
478 "pspoll frame\n", sdata->dev->name);
479 return;
480 }
481 skb_reserve(skb, local->hw.extra_tx_headroom);
482
483 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
484 memset(pspoll, 0, sizeof(*pspoll));
485 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
486 pspoll->frame_control = cpu_to_le16(fc);
46900298 487 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 488
489 /* aid in PS-Poll has its two MSBs each set to 1 */
490 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
491
46900298 492 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 493 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
494
495 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 496}
497
965bedad
JB		 498void ieee80211_send_nullfunc(struct ieee80211_local *local,
499 struct ieee80211_sub_if_data *sdata,
500 int powersave)
501{
502 struct sk_buff *skb;
503 struct ieee80211_hdr *nullfunc;
504 __le16 fc;
505
506 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
507 return;
508
509 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
510 if (!skb) {
511 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
512 "frame\n", sdata->dev->name);
513 return;
514 }
515 skb_reserve(skb, local->hw.extra_tx_headroom);
516
517 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
518 memset(nullfunc, 0, 24);
519 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
520 IEEE80211_FCTL_TODS);
521 if (powersave)
522 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
523 nullfunc->frame_control = fc;
524 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
525 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
526 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
527
528 ieee80211_tx_skb(sdata, skb, 0);
529}
530
cc32abd4
JB		 531/* spectrum management related things */
532static void ieee80211_chswitch_work(struct work_struct *work)
533{
534 struct ieee80211_sub_if_data *sdata =
535 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
537
538 if (!netif_running(sdata->dev))
539 return;
540
77fdaa12
JB		 541 mutex_lock(&ifmgd->mtx);
542 if (!ifmgd->associated)
543 goto out;
cc32abd4
JB		 544
545 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 546 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
547
cc32abd4 548 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 549 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 550
cc32abd4
JB		 551 ieee80211_wake_queues_by_reason(&sdata->local->hw,
552 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 553 out:
554 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
555 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 556}
557
558static void ieee80211_chswitch_timer(unsigned long data)
559{
560 struct ieee80211_sub_if_data *sdata =
561 (struct ieee80211_sub_if_data *) data;
562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
563
5bb644a0
JB		 564 if (sdata->local->quiescing) {
565 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
566 return;
567 }
568
42935eca 569 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 570}
571
572void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
573 struct ieee80211_channel_sw_ie *sw_elem,
574 struct ieee80211_bss *bss)
575{
576 struct ieee80211_channel *new_ch;
577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
578 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
579
77fdaa12
JB		 580 ASSERT_MGD_MTX(ifmgd);
581
582 if (!ifmgd->associated)
cc32abd4
JB		 583 return;
584
fbe9c429 585 if (sdata->local->scanning)
cc32abd4
JB		 586 return;
587
588 /* Disregard subsequent beacons if we are already running a timer
589 processing a CSA */
590
591 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
592 return;
593
594 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
595 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
596 return;
597
598 sdata->local->csa_channel = new_ch;
599
600 if (sw_elem->count <= 1) {
42935eca 601 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 602 } else {
603 ieee80211_stop_queues_by_reason(&sdata->local->hw,
604 IEEE80211_QUEUE_STOP_REASON_CSA);
605 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
606 mod_timer(&ifmgd->chswitch_timer,
607 jiffies +
608 msecs_to_jiffies(sw_elem->count *
609 bss->cbss.beacon_interval));
610 }
611}
612
613static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
614 u16 capab_info, u8 *pwr_constr_elem,
615 u8 pwr_constr_elem_len)
616{
617 struct ieee80211_conf *conf = &sdata->local->hw.conf;
618
619 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
620 return;
621
622 /* Power constraint IE length should be 1 octet */
623 if (pwr_constr_elem_len != 1)
624 return;
625
626 if ((*pwr_constr_elem <= conf->channel->max_power) &&
627 (*pwr_constr_elem != sdata->local->power_constr_level)) {
628 sdata->local->power_constr_level = *pwr_constr_elem;
629 ieee80211_hw_config(sdata->local, 0);
630 }
631}
632
965bedad
JB		 633/* powersave */
634static void ieee80211_enable_ps(struct ieee80211_local *local,
635 struct ieee80211_sub_if_data *sdata)
636{
637 struct ieee80211_conf *conf = &local->hw.conf;
638
d5edaedc
JB		 639 /*
640 * If we are scanning right now then the parameters will
641 * take effect when scan finishes.
642 */
fbe9c429 643 if (local->scanning)
d5edaedc
JB		 644 return;
645
965bedad
JB		 646 if (conf->dynamic_ps_timeout > 0 &&
647 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
648 mod_timer(&local->dynamic_ps_timer, jiffies +
649 msecs_to_jiffies(conf->dynamic_ps_timeout));
650 } else {
651 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
652 ieee80211_send_nullfunc(local, sdata, 1);
653 conf->flags |= IEEE80211_CONF_PS;
654 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
655 }
656}
657
658static void ieee80211_change_ps(struct ieee80211_local *local)
659{
660 struct ieee80211_conf *conf = &local->hw.conf;
661
662 if (local->ps_sdata) {
965bedad
JB		 663 ieee80211_enable_ps(local, local->ps_sdata);
664 } else if (conf->flags & IEEE80211_CONF_PS) {
665 conf->flags &= ~IEEE80211_CONF_PS;
666 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
667 del_timer_sync(&local->dynamic_ps_timer);
668 cancel_work_sync(&local->dynamic_ps_enable_work);
669 }
670}
671
672/* need to hold RTNL or interface lock */
10f644a4 673void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 674{
675 struct ieee80211_sub_if_data *sdata, *found = NULL;
676 int count = 0;
677
678 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
679 local->ps_sdata = NULL;
680 return;
681 }
682
683 list_for_each_entry(sdata, &local->interfaces, list) {
684 if (!netif_running(sdata->dev))
685 continue;
686 if (sdata->vif.type != NL80211_IFTYPE_STATION)
687 continue;
688 found = sdata;
689 count++;
690 }
691
43f78531 692 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 693 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
b291ba11
JB		 694 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
695 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 696 s32 beaconint_us;
697
698 if (latency < 0)
699 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
700
701 beaconint_us = ieee80211_tu_to_usec(
702 found->vif.bss_conf.beacon_int);
703
04fe2037 704 if (beaconint_us > latency) {
10f644a4 705 local->ps_sdata = NULL;
04fe2037
JB		 706 } else {
707 u8 dtimper = found->vif.bss_conf.dtim_period;
708 int maxslp = 1;
709
710 if (dtimper > 1)
711 maxslp = min_t(int, dtimper,
712 latency / beaconint_us);
713
9ccebe61 714 local->hw.conf.max_sleep_period = maxslp;
10f644a4 715 local->ps_sdata = found;
04fe2037 716 }
10f644a4 717 } else {
965bedad 718 local->ps_sdata = NULL;
10f644a4 719 }
965bedad
JB		 720
721 ieee80211_change_ps(local);
722}
723
724void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
725{
726 struct ieee80211_local *local =
727 container_of(work, struct ieee80211_local,
728 dynamic_ps_disable_work);
729
730 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
731 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
732 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
733 }
734
735 ieee80211_wake_queues_by_reason(&local->hw,
736 IEEE80211_QUEUE_STOP_REASON_PS);
737}
738
739void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
740{
741 struct ieee80211_local *local =
742 container_of(work, struct ieee80211_local,
743 dynamic_ps_enable_work);
744 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
745
746 /* can only happen when PS was just disabled anyway */
747 if (!sdata)
748 return;
749
750 if (local->hw.conf.flags & IEEE80211_CONF_PS)
751 return;
752
753 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
754 ieee80211_send_nullfunc(local, sdata, 1);
755
756 local->hw.conf.flags |= IEEE80211_CONF_PS;
757 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
758}
759
760void ieee80211_dynamic_ps_timer(unsigned long data)
761{
762 struct ieee80211_local *local = (void *) data;
763
78f1a8b7 764 if (local->quiescing || local->suspended)
5bb644a0
JB		 765 return;
766
42935eca 767 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 768}
769
60f8b39c 770/* MLME */
f698d856 771static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 772 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 773 u8 *wmm_param, size_t wmm_param_len)
774{
f0706e82
JB		 775 struct ieee80211_tx_queue_params params;
776 size_t left;
777 int count;
778 u8 *pos;
779
46900298 780 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 781 return;
782
783 if (!wmm_param)
784 return;
785
f0706e82
JB		 786 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
787 return;
788 count = wmm_param[6] & 0x0f;
46900298 789 if (count == ifmgd->wmm_last_param_set)
f0706e82 790 return;
46900298 791 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 792
793 pos = wmm_param + 8;
794 left = wmm_param_len - 8;
795
796 memset(&params, 0, sizeof(params));
797
f0706e82
JB		 798 local->wmm_acm = 0;
799 for (; left >= 4; left -= 4, pos += 4) {
800 int aci = (pos[0] >> 5) & 0x03;
801 int acm = (pos[0] >> 4) & 0x01;
802 int queue;
803
804 switch (aci) {
0eeb59fe 805 case 1: /* AC_BK */
e100bb64 806 queue = 3;
988c0f72 807 if (acm)
0eeb59fe 808 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 809 break;
0eeb59fe 810 case 2: /* AC_VI */
e100bb64 811 queue = 1;
988c0f72 812 if (acm)
0eeb59fe 813 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 814 break;
0eeb59fe 815 case 3: /* AC_VO */
e100bb64 816 queue = 0;
988c0f72 817 if (acm)
0eeb59fe 818 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 819 break;
0eeb59fe 820 case 0: /* AC_BE */
f0706e82 821 default:
e100bb64 822 queue = 2;
988c0f72 823 if (acm)
0eeb59fe 824 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 825 break;
826 }
827
828 params.aifs = pos[0] & 0x0f;
829 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
830 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 831 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 832#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 833 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 834 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 835 wiphy_name(local->hw.wiphy), queue, aci, acm,
836 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 837#endif
24487981 838 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 839 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 840 "parameters for queue %d\n",
841 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 842 }
843}
844
7a5158ef
JB		 845static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
846 u16 capab, bool erp_valid, u8 erp)
5628221c 847{
bda3933a 848 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 849 u32 changed = 0;
7a5158ef
JB		 850 bool use_protection;
851 bool use_short_preamble;
852 bool use_short_slot;
853
854 if (erp_valid) {
855 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
856 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
857 } else {
858 use_protection = false;
859 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
860 }
861
862 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 863
471b3efd 864 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 865 bss_conf->use_cts_prot = use_protection;
866 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 867 }
7e9ed188 868
d43c7b37 869 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 870 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 871 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 872 }
d9430a32 873
7a5158ef 874 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 875 bss_conf->use_short_slot = use_short_slot;
876 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 877 }
878
879 return changed;
880}
881
f698d856 882static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
77fdaa12 883 struct ieee80211_bss *bss,
ae5eb026 884 u32 bss_info_changed)
f0706e82 885{
471b3efd 886 struct ieee80211_local *local = sdata->local;
d6f2da5b 887
ae5eb026 888 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 889 /* set timing information */
890 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
891 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
892 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 893
77fdaa12
JB		 894 bss_info_changed |= BSS_CHANGED_BEACON_INT;
895 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
896 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 897
77fdaa12
JB		 898 sdata->u.mgd.associated = bss;
899 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 900
b291ba11
JB		 901 /* just to be sure */
902 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
903 IEEE80211_STA_BEACON_POLL);
904
9ac19a90 905 ieee80211_led_assoc(local, 1);
9306102e 906
bda3933a 907 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 908 /*
909 * For now just always ask the driver to update the basic rateset
910 * when we have associated, we aren't checking whether it actually
911 * changed or not.
912 */
ae5eb026 913 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 914
915 /* And the BSSID changed - we're associated now */
916 bss_info_changed |= BSS_CHANGED_BSSID;
917
ae5eb026 918 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 919
056508dc
JB		 920 mutex_lock(&local->iflist_mtx);
921 ieee80211_recalc_ps(local, -1);
922 mutex_unlock(&local->iflist_mtx);
e0cb686f 923
9ac19a90
JB		 924 netif_tx_start_all_queues(sdata->dev);
925 netif_carrier_on(sdata->dev);
f0706e82
JB		 926}
927
77fdaa12
JB		 928static enum rx_mgmt_action __must_check
929ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
930 struct ieee80211_mgd_work *wk)
f0706e82 931{
46900298 932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 933 struct ieee80211_local *local = sdata->local;
46900298 934
77fdaa12
JB		 935 wk->tries++;
936 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 937 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 938 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 939
940 /*
941 * Most likely AP is not in the range so remove the
77fdaa12 942 * bss struct for that AP.
7a947080 943 */
77fdaa12 944 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 945
946 /*
947 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 948 * due to work needing to be done. Hence, queue the STAs work
949 * again for that.
11432379 950 */
42935eca 951 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 952 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 953 }
f0706e82 954
77fdaa12
JB		 955 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
956 sdata->dev->name, wk->bss->cbss.bssid,
957 wk->tries);
f0706e82 958
77fdaa12
JB		 959 /*
960 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 961 * will not answer to direct packet in unassociated state.
962 */
77fdaa12
JB		 963 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
964
965 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 966 run_again(ifmgd, wk->timeout);
9ac19a90 967
77fdaa12 968 return RX_MGMT_NONE;
60f8b39c 969}
f0706e82 970
9ac19a90 971
77fdaa12
JB		 972static enum rx_mgmt_action __must_check
973ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
974 struct ieee80211_mgd_work *wk)
f0706e82 975{
46900298 976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 977 struct ieee80211_local *local = sdata->local;
46900298 978
77fdaa12
JB		 979 wk->tries++;
980 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 981 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 982 " timed out\n",
77fdaa12
JB		 983 sdata->dev->name, wk->bss->cbss.bssid);
984
985 /*
986 * Most likely AP is not in the range so remove the
987 * bss struct for that AP.
988 */
989 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 990
991 /*
992 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 993 * due to work needing to be done. Hence, queue the STAs work
994 * again for that.
11432379 995 */
42935eca 996 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 997 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 998 }
f0706e82 999
77fdaa12
JB		 1000 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1001 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1002
1003 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1004 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1005 wk->auth_transaction = 2;
f0706e82 1006
77fdaa12 1007 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1008 run_again(ifmgd, wk->timeout);
9ac19a90 1009
77fdaa12 1010 return RX_MGMT_NONE;
f0706e82
JB		 1011}
1012
b291ba11 1013static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
aa458d17 1014{
46900298 1015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1016 struct ieee80211_local *local = sdata->local;
1017 struct sta_info *sta;
e0cb686f 1018 u32 changed = 0, config_changed = 0;
b291ba11 1019 u8 bssid[ETH_ALEN];
aa458d17 1020
77fdaa12
JB		 1021 ASSERT_MGD_MTX(ifmgd);
1022
b291ba11
JB		 1023 if (WARN_ON(!ifmgd->associated))
1024 return;
1025
1026 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1027
77fdaa12
JB		 1028 ifmgd->associated = NULL;
1029 memset(ifmgd->bssid, 0, ETH_ALEN);
1030
1031 /*
1032 * we need to commit the associated = NULL change because the
1033 * scan code uses that to determine whether this iface should
1034 * go to/wake up from powersave or not -- and could otherwise
1035 * wake the queues erroneously.
1036 */
1037 smp_mb();
1038
1039 /*
1040 * Thus, we can only afterwards stop the queues -- to account
1041 * for the case where another CPU is finishing a scan at this
1042 * time -- we don't want the scan code to enable queues.
1043 */
aa458d17 1044
24e64622 1045 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1046 netif_carrier_off(sdata->dev);
1047
1fa6f4af 1048 rcu_read_lock();
77fdaa12 1049 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1050 if (sta)
1051 ieee80211_sta_tear_down_BA_sessions(sta);
1052 rcu_read_unlock();
aa458d17 1053
f5e5bf25
TW		 1054 changed |= ieee80211_reset_erp_info(sdata);
1055
f5e5bf25 1056 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1057 changed |= BSS_CHANGED_ASSOC;
1058 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1059
aa837e1d
JB		 1060 ieee80211_set_wmm_default(sdata);
1061
5cff20e6
JB		 1062 ieee80211_recalc_idle(local);
1063
4797938c 1064 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1065 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1066
413ad50a
JB		 1067 /* on the next assoc, re-program HT parameters */
1068 sdata->ht_opmode_valid = false;
1069
a8302de9
VT		 1070 local->power_constr_level = 0;
1071
520eb820
KV		 1072 del_timer_sync(&local->dynamic_ps_timer);
1073 cancel_work_sync(&local->dynamic_ps_enable_work);
1074
e0cb686f
KV		 1075 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1076 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1077 config_changed |= IEEE80211_CONF_CHANGE_PS;
1078 }
ae5eb026 1079
e0cb686f 1080 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1081
1082 /* And the BSSID changed -- not very interesting here */
1083 changed |= BSS_CHANGED_BSSID;
ae5eb026 1084 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1085
1086 rcu_read_lock();
1087
77fdaa12 1088 sta = sta_info_get(local, bssid);
8e268e47
TW		 1089 if (!sta) {
1090 rcu_read_unlock();
1091 return;
1092 }
1093
1094 sta_info_unlink(&sta);
1095
1096 rcu_read_unlock();
1097
1098 sta_info_destroy(sta);
aa458d17 1099}
f0706e82 1100
77fdaa12
JB		 1101static enum rx_mgmt_action __must_check
1102ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1103 struct ieee80211_mgd_work *wk)
f0706e82 1104{
46900298 1105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1106 struct ieee80211_local *local = sdata->local;
46900298 1107
77fdaa12
JB		 1108 wk->tries++;
1109 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1110 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1111 " timed out\n",
77fdaa12
JB		 1112 sdata->dev->name, wk->bss->cbss.bssid);
1113
1114 /*
1115 * Most likely AP is not in the range so remove the
1116 * bss struct for that AP.
1117 */
1118 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1119
11432379
HS		 1120 /*
1121 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1122 * due to work needing to be done. Hence, queue the STAs work
1123 * again for that.
11432379 1124 */
42935eca 1125 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1126 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1127 }
1128
77fdaa12
JB		 1129 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1130 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1131 ieee80211_send_assoc(sdata, wk);
1132
1133 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1134 run_again(ifmgd, wk->timeout);
f0706e82 1135
77fdaa12 1136 return RX_MGMT_NONE;
f0706e82
JB		 1137}
1138
3cf335d5
KV		 1139void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1140 struct ieee80211_hdr *hdr)
1141{
1142 /*
1143 * We can postpone the mgd.timer whenever receiving unicast frames
1144 * from AP because we know that the connection is working both ways
1145 * at that time. But multicast frames (and hence also beacons) must
1146 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1147 * data idle periods for sending the periodic probe request to the
1148 * AP we're connected to.
3cf335d5 1149 */
b291ba11
JB		 1150 if (is_multicast_ether_addr(hdr->addr1))
1151 return;
1152
1153 mod_timer(&sdata->u.mgd.conn_mon_timer,
1154 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1155}
f0706e82 1156
a43abf29
ML		 1157static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1158{
1159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1160 const u8 *ssid;
1161
1162 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1163 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1164 ssid + 2, ssid[1], NULL, 0);
1165
1166 ifmgd->probe_send_count++;
1167 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1168 run_again(ifmgd, ifmgd->probe_timeout);
1169}
1170
b291ba11
JB		 1171static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1172 bool beacon)
04de8381 1173{
04de8381 1174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1175 bool already = false;
34bfc411 1176
0e2b6286
JB		 1177 if (!netif_running(sdata->dev))
1178 return;
1179
91a3bd76
LR		 1180 if (sdata->local->scanning)
1181 return;
1182
77fdaa12
JB		 1183 mutex_lock(&ifmgd->mtx);
1184
1185 if (!ifmgd->associated)
1186 goto out;
1187
a860402d 1188#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1189 if (beacon && net_ratelimit())
1190 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1191 "- sending probe request\n", sdata->dev->name);
a860402d 1192#endif
04de8381 1193
b291ba11
JB		 1194 /*
1195 * The driver/our work has already reported this event or the
1196 * connection monitoring has kicked in and we have already sent
1197 * a probe request. Or maybe the AP died and the driver keeps
1198 * reporting until we disassociate...
1199 *
1200 * In either case we have to ignore the current call to this
1201 * function (except for setting the correct probe reason bit)
1202 * because otherwise we would reset the timer every time and
1203 * never check whether we received a probe response!
1204 */
1205 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1206 IEEE80211_STA_CONNECTION_POLL))
1207 already = true;
1208
1209 if (beacon)
1210 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1211 else
1212 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1213
1214 if (already)
1215 goto out;
1216
4e751843
JB		 1217 mutex_lock(&sdata->local->iflist_mtx);
1218 ieee80211_recalc_ps(sdata->local, -1);
1219 mutex_unlock(&sdata->local->iflist_mtx);
1220
a43abf29
ML		 1221 ifmgd->probe_send_count = 0;
1222 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1223 out:
1224 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1225}
1226
b291ba11
JB		 1227void ieee80211_beacon_loss_work(struct work_struct *work)
1228{
1229 struct ieee80211_sub_if_data *sdata =
1230 container_of(work, struct ieee80211_sub_if_data,
1231 u.mgd.beacon_loss_work);
1232
1233 ieee80211_mgd_probe_ap(sdata, true);
1234}
1235
04de8381
KV		 1236void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1237{
1238 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1239
42935eca 1240 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1241}
1242EXPORT_SYMBOL(ieee80211_beacon_loss);
1243
77fdaa12
JB		 1244static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1245 struct ieee80211_mgd_work *wk)
f0706e82 1246{
77fdaa12 1247 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1248 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1249}
1250
1251
f698d856 1252static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1253 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1254 struct ieee80211_mgmt *mgmt,
1255 size_t len)
1256{
1257 u8 *pos;
1258 struct ieee802_11_elems elems;
1259
f0706e82 1260 pos = mgmt->u.auth.variable;
67a4cce4 1261 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1262 if (!elems.challenge)
f0706e82 1263 return;
77fdaa12 1264 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1265 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1266 wk->bss->cbss.bssid,
1267 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1268 wk->auth_transaction = 4;
fe3d2c3f
JB		 1269}
1270
77fdaa12
JB		 1271static enum rx_mgmt_action __must_check
1272ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1273 struct ieee80211_mgd_work *wk,
1274 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1275{
f0706e82
JB		 1276 u16 auth_alg, auth_transaction, status_code;
1277
77fdaa12
JB		 1278 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1279 return RX_MGMT_NONE;
f0706e82 1280
f4ea83dd 1281 if (len < 24 + 6)
77fdaa12 1282 return RX_MGMT_NONE;
f0706e82 1283
77fdaa12
JB		 1284 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1285 return RX_MGMT_NONE;
f0706e82 1286
77fdaa12
JB		 1287 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1288 return RX_MGMT_NONE;
f0706e82
JB		 1289
1290 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1291 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1292 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1293
77fdaa12
JB		 1294 if (auth_alg != wk->auth_alg ||
1295 auth_transaction != wk->auth_transaction)
1296 return RX_MGMT_NONE;
f0706e82
JB		 1297
1298 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1299 list_del(&wk->list);
1300 kfree(wk);
1301 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1302 }
1303
77fdaa12 1304 switch (wk->auth_alg) {
f0706e82
JB		 1305 case WLAN_AUTH_OPEN:
1306 case WLAN_AUTH_LEAP:
636a5d36 1307 case WLAN_AUTH_FT:
77fdaa12
JB		 1308 ieee80211_auth_completed(sdata, wk);
1309 return RX_MGMT_CFG80211_AUTH;
f0706e82 1310 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1311 if (wk->auth_transaction == 4) {
1312 ieee80211_auth_completed(sdata, wk);
1313 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1314 } else
77fdaa12 1315 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1316 break;
1317 }
77fdaa12
JB		 1318
1319 return RX_MGMT_NONE;
f0706e82
JB		 1320}
1321
1322
77fdaa12
JB		 1323static enum rx_mgmt_action __must_check
1324ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1325 struct ieee80211_mgd_work *wk,
1326 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1327{
46900298 1328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1329 const u8 *bssid = NULL;
f0706e82
JB		 1330 u16 reason_code;
1331
f4ea83dd 1332 if (len < 24 + 2)
77fdaa12 1333 return RX_MGMT_NONE;
f0706e82 1334
77fdaa12
JB		 1335 ASSERT_MGD_MTX(ifmgd);
1336
1337 if (wk)
1338 bssid = wk->bss->cbss.bssid;
1339 else
1340 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1341
1342 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1343
77fdaa12
JB		 1344 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1345 sdata->dev->name, bssid, reason_code);
1346
1347 if (!wk) {
b291ba11 1348 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 1349 } else {
1350 list_del(&wk->list);
1351 kfree(wk);
1352 }
f0706e82 1353
77fdaa12 1354 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1355}
1356
1357
77fdaa12
JB		 1358static enum rx_mgmt_action __must_check
1359ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1360 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1361{
46900298 1362 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1363 u16 reason_code;
1364
f4ea83dd 1365 if (len < 24 + 2)
77fdaa12 1366 return RX_MGMT_NONE;
f0706e82 1367
77fdaa12
JB		 1368 ASSERT_MGD_MTX(ifmgd);
1369
1370 if (WARN_ON(!ifmgd->associated))
1371 return RX_MGMT_NONE;
1372
1373 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1374 return RX_MGMT_NONE;
f0706e82
JB		 1375
1376 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1377
77fdaa12
JB		 1378 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1379 sdata->dev->name, reason_code);
f0706e82 1380
b291ba11 1381 ieee80211_set_disassoc(sdata);
77fdaa12 1382 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1383}
1384
1385
77fdaa12
JB		 1386static enum rx_mgmt_action __must_check
1387ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1388 struct ieee80211_mgd_work *wk,
1389 struct ieee80211_mgmt *mgmt, size_t len,
1390 bool reassoc)
f0706e82 1391{
46900298 1392 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1393 struct ieee80211_local *local = sdata->local;
8318d78a 1394 struct ieee80211_supported_band *sband;
f0706e82 1395 struct sta_info *sta;
881d948c 1396 u32 rates, basic_rates;
f0706e82
JB		 1397 u16 capab_info, status_code, aid;
1398 struct ieee802_11_elems elems;
bda3933a 1399 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1400 u8 *pos;
ae5eb026 1401 u32 changed = 0;
f0706e82 1402 int i, j;
ddf4ac53 1403 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1404 u16 ap_ht_cap_flags;
f0706e82 1405
77fdaa12
JB		 1406 /*
1407 * AssocResp and ReassocResp have identical structure, so process both
1408 * of them in this function.
1409 */
f0706e82 1410
f4ea83dd 1411 if (len < 24 + 6)
77fdaa12 1412 return RX_MGMT_NONE;
f0706e82 1413
77fdaa12
JB		 1414 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1415 return RX_MGMT_NONE;
f0706e82
JB		 1416
1417 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1418 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1419 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1420
0c68ae26 1421 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1422 "status=%d aid=%d)\n",
0c68ae26 1423 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1424 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1425
63a5ab82
JM		 1426 pos = mgmt->u.assoc_resp.variable;
1427 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1428
1429 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1430 elems.timeout_int && elems.timeout_int_len == 5 &&
1431 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1432 u32 tu, ms;
f797eb7e 1433 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1434 ms = tu * 1024 / 1000;
1435 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1436 "comeback duration %u TU (%u ms)\n",
1437 sdata->dev->name, tu, ms);
77fdaa12 1438 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1439 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1440 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1441 return RX_MGMT_NONE;
63a5ab82
JM		 1442 }
1443
f0706e82
JB		 1444 if (status_code != WLAN_STATUS_SUCCESS) {
1445 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1446 sdata->dev->name, status_code);
77fdaa12
JB		 1447 list_del(&wk->list);
1448 kfree(wk);
1449 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1450 }
1451
1dd84aa2
JB		 1452 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1453 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1454 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1455 aid &= ~(BIT(15) | BIT(14));
1456
f0706e82
JB		 1457 if (!elems.supp_rates) {
1458 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1459 sdata->dev->name);
77fdaa12 1460 return RX_MGMT_NONE;
f0706e82
JB		 1461 }
1462
f698d856 1463 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1464 ifmgd->aid = aid;
f0706e82 1465
d0709a65
JB		 1466 rcu_read_lock();
1467
f0706e82 1468 /* Add STA entry for the AP */
77fdaa12 1469 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1470 if (!sta) {
ddf4ac53 1471 newsta = true;
d0709a65 1472
77fdaa12
JB		 1473 rcu_read_unlock();
1474
1475 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1476 if (!sta) {
1477 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1478 " the AP\n", sdata->dev->name);
77fdaa12 1479 return RX_MGMT_NONE;
f0706e82 1480 }
f709fc69 1481
77fdaa12
JB		 1482 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1483 WLAN_STA_ASSOC_AP);
1484 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1485 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1486
77fdaa12
JB		 1487 rcu_read_lock();
1488 }
05e5e883 1489
60f8b39c
JB		 1490 rates = 0;
1491 basic_rates = 0;
1492 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1493
60f8b39c
JB		 1494 for (i = 0; i < elems.supp_rates_len; i++) {
1495 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1496 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1497
60f8b39c
JB		 1498 if (rate > 110)
1499 have_higher_than_11mbit = true;
1500
1501 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1502 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1503 rates |= BIT(j);
d61272cb
TW		 1504 if (is_basic)
1505 basic_rates |= BIT(j);
1506 break;
1507 }
f709fc69 1508 }
f709fc69
LCC		 1509 }
1510
60f8b39c
JB		 1511 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1512 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1513 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1514
60f8b39c
JB		 1515 if (rate > 110)
1516 have_higher_than_11mbit = true;
f0706e82 1517
60f8b39c 1518 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1519 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1520 rates |= BIT(j);
d61272cb
TW		 1521 if (is_basic)
1522 basic_rates |= BIT(j);
1523 break;
1524 }
60f8b39c 1525 }
1ebebea8 1526 }
f0706e82 1527
323ce79a 1528 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1529 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1530
1531 /* cf. IEEE 802.11 9.2.12 */
1532 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1533 have_higher_than_11mbit)
1534 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1535 else
1536 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1537
ab1faead 1538 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1539 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1540 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1541
1542 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1543
4b7679a5 1544 rate_control_rate_init(sta);
f0706e82 1545
46900298 1546 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1547 set_sta_flags(sta, WLAN_STA_MFP);
1548
ddf4ac53 1549 if (elems.wmm_param)
60f8b39c 1550 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1551
1552 if (newsta) {
1553 int err = sta_info_insert(sta);
1554 if (err) {
1555 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1556 " the AP (error %d)\n", sdata->dev->name, err);
1557 rcu_read_unlock();
77fdaa12 1558 return RX_MGMT_NONE;
ddf4ac53
JB		 1559 }
1560 }
1561
1562 rcu_read_unlock();
1563
1564 if (elems.wmm_param)
46900298 1565 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1566 elems.wmm_param_len);
aa837e1d
JB		 1567 else
1568 ieee80211_set_wmm_default(sdata);
f0706e82 1569
ae5eb026 1570 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1571 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1572 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1573 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1574 wk->bss->cbss.bssid,
ae5eb026
JB		 1575 ap_ht_cap_flags);
1576
056508dc
JB		 1577 /* delete work item -- must be before set_associated for PS */
1578 list_del(&wk->list);
1579
60f8b39c
JB		 1580 /* set AID and assoc capability,
1581 * ieee80211_set_associated() will tell the driver */
1582 bss_conf->aid = aid;
1583 bss_conf->assoc_capability = capab_info;
77fdaa12 1584 ieee80211_set_associated(sdata, wk->bss, changed);
f0706e82 1585
15b7b062 1586 /*
b291ba11
JB		 1587 * Start timer to probe the connection to the AP now.
1588 * Also start the timer that will detect beacon loss.
15b7b062 1589 */
b291ba11
JB		 1590 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1591 mod_beacon_timer(sdata);
15b7b062 1592
77fdaa12
JB		 1593 kfree(wk);
1594 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1595}
1596
1597
98c8fccf
JB		 1598static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1599 struct ieee80211_mgmt *mgmt,
1600 size_t len,
1601 struct ieee80211_rx_status *rx_status,
1602 struct ieee802_11_elems *elems,
1603 bool beacon)
1604{
1605 struct ieee80211_local *local = sdata->local;
1606 int freq;
c2b13452 1607 struct ieee80211_bss *bss;
98c8fccf 1608 struct ieee80211_channel *channel;
98c8fccf
JB		 1609
1610 if (elems->ds_params && elems->ds_params_len == 1)
1611 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1612 else
1613 freq = rx_status->freq;
1614
1615 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1616
1617 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1618 return;
1619
98c8fccf 1620 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1621 channel, beacon);
77fdaa12
JB		 1622 if (bss)
1623 ieee80211_rx_bss_put(local, bss);
1624
1625 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1626 return;
1627
c481ec97 1628 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1629 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1630 ETH_ALEN) == 0)) {
c481ec97
S		 1631 struct ieee80211_channel_sw_ie *sw_elem =
1632 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1633 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1634 }
f0706e82
JB		 1635}
1636
1637
f698d856 1638static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1639 struct ieee80211_mgd_work *wk,
1640 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1641 struct ieee80211_rx_status *rx_status)
1642{
15b7b062 1643 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1644 size_t baselen;
1645 struct ieee802_11_elems elems;
1646
15b7b062
KV		 1647 ifmgd = &sdata->u.mgd;
1648
77fdaa12
JB		 1649 ASSERT_MGD_MTX(ifmgd);
1650
8e7cdbb6
TW		 1651 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1652 return; /* ignore ProbeResp to foreign address */
1653
ae6a44e3
EK		 1654 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1655 if (baselen > len)
1656 return;
1657
1658 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1659 &elems);
1660
98c8fccf 1661 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1662
1663 /* direct probe may be part of the association flow */
77fdaa12 1664 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1665 printk(KERN_DEBUG "%s direct probe responded\n",
1666 sdata->dev->name);
77fdaa12
JB		 1667 wk->tries = 0;
1668 wk->state = IEEE80211_MGD_STATE_AUTH;
1669 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1670 }
15b7b062 1671
77fdaa12
JB		 1672 if (ifmgd->associated &&
1673 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1674 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1675 IEEE80211_STA_CONNECTION_POLL)) {
1676 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1677 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1678 mutex_lock(&sdata->local->iflist_mtx);
1679 ieee80211_recalc_ps(sdata->local, -1);
1680 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1681 /*
1682 * We've received a probe response, but are not sure whether
1683 * we have or will be receiving any beacons or data, so let's
1684 * schedule the timers again, just in case.
1685 */
1686 mod_beacon_timer(sdata);
1687 mod_timer(&ifmgd->conn_mon_timer,
1688 round_jiffies_up(jiffies +
1689 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1690 }
f0706e82
JB		 1691}
1692
d91f36db
JB		 1693/*
1694 * This is the canonical list of information elements we care about,
1695 * the filter code also gives us all changes to the Microsoft OUI
1696 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1697 *
1698 * We implement beacon filtering in software since that means we can
1699 * avoid processing the frame here and in cfg80211, and userspace
1700 * will not be able to tell whether the hardware supports it or not.
1701 *
1702 * XXX: This list needs to be dynamic -- userspace needs to be able to
1703 * add items it requires. It also needs to be able to tell us to
1704 * look out for other vendor IEs.
1705 */
1706static const u64 care_about_ies =
1d4df3a5
JB		 1707 (1ULL << WLAN_EID_COUNTRY) |
1708 (1ULL << WLAN_EID_ERP_INFO) |
1709 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1710 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1711 (1ULL << WLAN_EID_HT_CAPABILITY) |
1712 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1713
f698d856 1714static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1715 struct ieee80211_mgmt *mgmt,
1716 size_t len,
1717 struct ieee80211_rx_status *rx_status)
1718{
d91f36db 1719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1720 size_t baselen;
1721 struct ieee802_11_elems elems;
f698d856 1722 struct ieee80211_local *local = sdata->local;
471b3efd 1723 u32 changed = 0;
d91f36db 1724 bool erp_valid, directed_tim = false;
7a5158ef 1725 u8 erp_value = 0;
d91f36db 1726 u32 ncrc;
77fdaa12
JB		 1727 u8 *bssid;
1728
1729 ASSERT_MGD_MTX(ifmgd);
f0706e82 1730
ae6a44e3
EK		 1731 /* Process beacon from the current BSS */
1732 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1733 if (baselen > len)
1734 return;
1735
d91f36db 1736 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1737 return;
f0706e82 1738
b291ba11
JB		 1739 /*
1740 * We might have received a number of frames, among them a
1741 * disassoc frame and a beacon...
1742 */
1743 if (!ifmgd->associated)
77fdaa12
JB		 1744 return;
1745
1746 bssid = ifmgd->associated->cbss.bssid;
1747
b291ba11
JB		 1748 /*
1749 * And in theory even frames from a different AP we were just
1750 * associated to a split-second ago!
1751 */
1752 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1753 return;
1754
b291ba11 1755 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1756#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1757 if (net_ratelimit()) {
1758 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1759 "to a received beacon\n", sdata->dev->name);
1760 }
1761#endif
b291ba11 1762 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1763 mutex_lock(&local->iflist_mtx);
1764 ieee80211_recalc_ps(local, -1);
1765 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1766 }
1767
b291ba11
JB		 1768 /*
1769 * Push the beacon loss detection into the future since
1770 * we are processing a beacon from the AP just now.
1771 */
1772 mod_beacon_timer(sdata);
1773
d91f36db
JB		 1774 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1775 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1776 len - baselen, &elems,
1777 care_about_ies, ncrc);
1778
1779 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1780 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1781 ifmgd->aid);
d91f36db 1782
30196673
JM		 1783 if (ncrc != ifmgd->beacon_crc) {
1784 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1785 true);
d91f36db 1786
30196673
JM		 1787 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1788 elems.wmm_param_len);
1789 }
fe3fa827 1790
25c9c875 1791 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1792 if (directed_tim) {
572e0012
KV		 1793 if (local->hw.conf.dynamic_ps_timeout > 0) {
1794 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1795 ieee80211_hw_config(local,
1796 IEEE80211_CONF_CHANGE_PS);
1797 ieee80211_send_nullfunc(local, sdata, 0);
1798 } else {
1799 local->pspolling = true;
1800
1801 /*
1802 * Here is assumed that the driver will be
1803 * able to send ps-poll frame and receive a
1804 * response even though power save mode is
1805 * enabled, but some drivers might require
1806 * to disable power save here. This needs
1807 * to be investigated.
1808 */
1809 ieee80211_send_pspoll(local, sdata);
1810 }
a97b77b9
VN		 1811 }
1812 }
7a5158ef 1813
30196673
JM		 1814 if (ncrc == ifmgd->beacon_crc)
1815 return;
1816 ifmgd->beacon_crc = ncrc;
1817
7a5158ef
JB		 1818 if (elems.erp_info && elems.erp_info_len >= 1) {
1819 erp_valid = true;
1820 erp_value = elems.erp_info[0];
1821 } else {
1822 erp_valid = false;
50c4afb9 1823 }
7a5158ef
JB		 1824 changed |= ieee80211_handle_bss_capability(sdata,
1825 le16_to_cpu(mgmt->u.beacon.capab_info),
1826 erp_valid, erp_value);
f0706e82 1827
d3c990fb 1828
53d6f81c 1829 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1830 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1831 struct sta_info *sta;
1832 struct ieee80211_supported_band *sband;
1833 u16 ap_ht_cap_flags;
1834
1835 rcu_read_lock();
1836
77fdaa12
JB		 1837 sta = sta_info_get(local, bssid);
1838 if (WARN_ON(!sta)) {
ae5eb026
JB		 1839 rcu_read_unlock();
1840 return;
1841 }
1842
1843 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1844
1845 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1846 elems.ht_cap_elem, &sta->sta.ht_cap);
1847
1848 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1849
1850 rcu_read_unlock();
1851
1852 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1853 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1854 }
1855
8b19e6ca 1856 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1857 if (elems.country_elem) {
a8302de9
VT		 1858 /* TODO: IBSS also needs this */
1859 if (elems.pwr_constr_elem)
1860 ieee80211_handle_pwr_constr(sdata,
1861 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1862 elems.pwr_constr_elem,
1863 elems.pwr_constr_elem_len);
3f2355cb
LR		 1864 }
1865
471b3efd 1866 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1867}
1868
46900298 1869ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1870 struct sk_buff *skb)
f0706e82 1871{
f698d856 1872 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1873 struct ieee80211_mgmt *mgmt;
1874 u16 fc;
1875
1876 if (skb->len < 24)
46900298 1877 return RX_DROP_MONITOR;
f0706e82
JB		 1878
1879 mgmt = (struct ieee80211_mgmt *) skb->data;
1880 fc = le16_to_cpu(mgmt->frame_control);
1881
1882 switch (fc & IEEE80211_FCTL_STYPE) {
1883 case IEEE80211_STYPE_PROBE_REQ:
1884 case IEEE80211_STYPE_PROBE_RESP:
1885 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1886 case IEEE80211_STYPE_AUTH:
1887 case IEEE80211_STYPE_ASSOC_RESP:
1888 case IEEE80211_STYPE_REASSOC_RESP:
1889 case IEEE80211_STYPE_DEAUTH:
1890 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1891 case IEEE80211_STYPE_ACTION:
46900298 1892 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1893 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1894 return RX_QUEUED;
f0706e82
JB		 1895 }
1896
46900298 1897 return RX_DROP_MONITOR;
f0706e82
JB		 1898}
1899
f698d856 1900static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1901 struct sk_buff *skb)
1902{
77fdaa12 1903 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1904 struct ieee80211_rx_status *rx_status;
f0706e82 1905 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1906 struct ieee80211_mgd_work *wk;
1907 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1908 u16 fc;
1909
f0706e82
JB		 1910 rx_status = (struct ieee80211_rx_status *) skb->cb;
1911 mgmt = (struct ieee80211_mgmt *) skb->data;
1912 fc = le16_to_cpu(mgmt->frame_control);
1913
77fdaa12
JB		 1914 mutex_lock(&ifmgd->mtx);
1915
1916 if (ifmgd->associated &&
1917 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1918 ETH_ALEN) == 0) {
1919 switch (fc & IEEE80211_FCTL_STYPE) {
1920 case IEEE80211_STYPE_BEACON:
1921 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1922 rx_status);
1923 break;
1924 case IEEE80211_STYPE_PROBE_RESP:
1925 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1926 skb->len, rx_status);
1927 break;
1928 case IEEE80211_STYPE_DEAUTH:
1929 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1930 mgmt, skb->len);
1931 break;
1932 case IEEE80211_STYPE_DISASSOC:
1933 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1934 break;
1935 case IEEE80211_STYPE_ACTION:
1936 /* XXX: differentiate, can only happen for CSA now! */
1937 ieee80211_sta_process_chanswitch(sdata,
1938 &mgmt->u.action.u.chan_switch.sw_elem,
1939 ifmgd->associated);
1940 break;
1941 }
1942 mutex_unlock(&ifmgd->mtx);
1943
1944 switch (rma) {
1945 case RX_MGMT_NONE:
1946 /* no action */
1947 break;
1948 case RX_MGMT_CFG80211_DEAUTH:
667503dd
JB		 1949 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1950 NULL);
77fdaa12
JB		 1951 break;
1952 case RX_MGMT_CFG80211_DISASSOC:
667503dd
JB		 1953 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1954 NULL);
77fdaa12
JB		 1955 break;
1956 default:
1957 WARN(1, "unexpected: %d", rma);
1958 }
1959 goto out;
1960 }
1961
1962 list_for_each_entry(wk, &ifmgd->work_list, list) {
1963 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1964 continue;
1965
1966 switch (fc & IEEE80211_FCTL_STYPE) {
1967 case IEEE80211_STYPE_PROBE_RESP:
1968 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1969 rx_status);
1970 break;
1971 case IEEE80211_STYPE_AUTH:
1972 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1973 break;
1974 case IEEE80211_STYPE_ASSOC_RESP:
1975 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1976 skb->len, false);
1977 break;
1978 case IEEE80211_STYPE_REASSOC_RESP:
1979 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1980 skb->len, true);
1981 break;
1982 case IEEE80211_STYPE_DEAUTH:
1983 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1984 skb->len);
1985 break;
1986 }
1987 /*
1988 * We've processed this frame for that work, so it can't
1989 * belong to another work struct.
1990 * NB: this is also required for correctness because the
1991 * called functions can free 'wk', and for 'rma'!
1992 */
46900298 1993 break;
77fdaa12
JB		 1994 }
1995
1996 mutex_unlock(&ifmgd->mtx);
1997
1998 switch (rma) {
1999 case RX_MGMT_NONE:
2000 /* no action */
46900298 2001 break;
77fdaa12 2002 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2003 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2004 break;
77fdaa12 2005 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2006 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2007 break;
8d8b261a
JB		 2008 case RX_MGMT_CFG80211_DEAUTH:
2009 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
2010 break;
77fdaa12
JB		 2011 default:
2012 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2013 }
2014
77fdaa12 2015 out:
f0706e82
JB		 2016 kfree_skb(skb);
2017}
2018
9c6bd790 2019static void ieee80211_sta_timer(unsigned long data)
f0706e82 2020{
60f8b39c
JB		 2021 struct ieee80211_sub_if_data *sdata =
2022 (struct ieee80211_sub_if_data *) data;
46900298 2023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2024 struct ieee80211_local *local = sdata->local;
f0706e82 2025
5bb644a0
JB		 2026 if (local->quiescing) {
2027 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2028 return;
2029 }
2030
42935eca 2031 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2032}
2033
9c6bd790
JB		 2034static void ieee80211_sta_work(struct work_struct *work)
2035{
2036 struct ieee80211_sub_if_data *sdata =
46900298 2037 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2038 struct ieee80211_local *local = sdata->local;
46900298 2039 struct ieee80211_if_managed *ifmgd;
9c6bd790 2040 struct sk_buff *skb;
77fdaa12
JB		 2041 struct ieee80211_mgd_work *wk, *tmp;
2042 LIST_HEAD(free_work);
2043 enum rx_mgmt_action rma;
2044 bool anybusy = false;
9c6bd790
JB		 2045
2046 if (!netif_running(sdata->dev))
2047 return;
2048
fbe9c429 2049 if (local->scanning)
9c6bd790
JB		 2050 return;
2051
46900298 2052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2053 return;
5bb644a0
JB		 2054
2055 /*
42935eca
LR		 2056 * ieee80211_queue_work() should have picked up most cases,
2057 * here we'll pick the the rest.
5bb644a0 2058 */
42935eca
LR		 2059 if (WARN(local->suspended, "STA MLME work scheduled while "
2060 "going to suspend\n"))
5bb644a0
JB		 2061 return;
2062
46900298 2063 ifmgd = &sdata->u.mgd;
f0706e82 2064
77fdaa12 2065 /* first process frames to avoid timing out while a frame is pending */
46900298 2066 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2067 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2068
77fdaa12
JB		 2069 /* then process the rest of the work */
2070 mutex_lock(&ifmgd->mtx);
2071
b291ba11
JB		 2072 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2073 IEEE80211_STA_CONNECTION_POLL) &&
2074 ifmgd->associated) {
a43abf29
ML		 2075 u8 bssid[ETH_ALEN];
2076
2077 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2078 if (time_is_after_jiffies(ifmgd->probe_timeout))
2079 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2080
2081 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2082#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2083 printk(KERN_DEBUG "No probe response from AP %pM"
2084 " after %dms, try %d\n", bssid,
2085 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2086 ifmgd->probe_send_count);
2087#endif
2088 ieee80211_mgd_probe_ap_send(sdata);
2089 } else {
b291ba11
JB		 2090 /*
2091 * We actually lost the connection ... or did we?
2092 * Let's make sure!
2093 */
2094 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2095 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2096 printk(KERN_DEBUG "No probe response from AP %pM"
2097 " after %dms, disconnecting.\n",
2098 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2099 ieee80211_set_disassoc(sdata);
2100 mutex_unlock(&ifmgd->mtx);
2101 /*
2102 * must be outside lock due to cfg80211,
2103 * but that's not a problem.
2104 */
2105 ieee80211_send_deauth_disassoc(sdata, bssid,
2106 IEEE80211_STYPE_DEAUTH,
2107 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2108 NULL);
2109 mutex_lock(&ifmgd->mtx);
2110 }
2111 }
2112
77fdaa12
JB		 2113 list_for_each_entry(wk, &ifmgd->work_list, list) {
2114 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2115 anybusy = true;
2116 break;
2117 }
f0706e82
JB		 2118 }
2119
77fdaa12
JB		 2120 ieee80211_recalc_idle(local);
2121
2122 if (!anybusy) {
2123 mutex_unlock(&ifmgd->mtx);
2124
2125 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
42935eca
LR		 2126 ieee80211_queue_delayed_work(&local->hw,
2127 &local->scan_work,
2128 round_jiffies_relative(0));
9c6bd790 2129 return;
77fdaa12 2130 }
d6f2da5b 2131
77fdaa12 2132 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2133 if (time_is_after_jiffies(wk->timeout)) {
2134 /*
2135 * This work item isn't supposed to be worked on
2136 * right now, but take care to adjust the timer
2137 * properly.
2138 */
2139 run_again(ifmgd, wk->timeout);
77fdaa12 2140 continue;
ca386f31 2141 }
5cff20e6 2142
77fdaa12
JB		 2143 switch (wk->state) {
2144 default:
2145 WARN_ON(1);
2146 /* fall through */
2147 case IEEE80211_MGD_STATE_IDLE:
2148 /* nothing */
2149 rma = RX_MGMT_NONE;
2150 break;
2151 case IEEE80211_MGD_STATE_PROBE:
2152 rma = ieee80211_direct_probe(sdata, wk);
2153 break;
2154 case IEEE80211_MGD_STATE_AUTH:
2155 rma = ieee80211_authenticate(sdata, wk);
2156 break;
2157 case IEEE80211_MGD_STATE_ASSOC:
2158 rma = ieee80211_associate(sdata, wk);
2159 break;
2160 }
2161
2162 switch (rma) {
2163 case RX_MGMT_NONE:
2164 /* no action required */
2165 break;
2166 case RX_MGMT_CFG80211_AUTH_TO:
2167 case RX_MGMT_CFG80211_ASSOC_TO:
2168 list_del(&wk->list);
2169 list_add(&wk->list, &free_work);
2170 wk->tries = rma; /* small abuse but only local */
2171 break;
2172 default:
2173 WARN(1, "unexpected: %d", rma);
2174 }
2175 }
2176
2177 mutex_unlock(&ifmgd->mtx);
2178
2179 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2180 switch (wk->tries) {
2181 case RX_MGMT_CFG80211_AUTH_TO:
2182 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2183 wk->bss->cbss.bssid);
77fdaa12
JB		 2184 break;
2185 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2186 cfg80211_send_assoc_timeout(sdata->dev,
2187 wk->bss->cbss.bssid);
77fdaa12
JB		 2188 break;
2189 default:
2190 WARN(1, "unexpected: %d", wk->tries);
2191 }
2192
2193 list_del(&wk->list);
2194 kfree(wk);
9c6bd790 2195 }
77fdaa12
JB		 2196
2197 ieee80211_recalc_idle(local);
f0706e82
JB		 2198}
2199
b291ba11
JB		 2200static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2201{
2202 struct ieee80211_sub_if_data *sdata =
2203 (struct ieee80211_sub_if_data *) data;
2204 struct ieee80211_local *local = sdata->local;
2205
2206 if (local->quiescing)
2207 return;
2208
42935eca 2209 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2210}
2211
2212static void ieee80211_sta_conn_mon_timer(unsigned long data)
2213{
2214 struct ieee80211_sub_if_data *sdata =
2215 (struct ieee80211_sub_if_data *) data;
2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2217 struct ieee80211_local *local = sdata->local;
2218
2219 if (local->quiescing)
2220 return;
2221
42935eca 2222 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2223}
2224
2225static void ieee80211_sta_monitor_work(struct work_struct *work)
2226{
2227 struct ieee80211_sub_if_data *sdata =
2228 container_of(work, struct ieee80211_sub_if_data,
2229 u.mgd.monitor_work);
2230
2231 ieee80211_mgd_probe_ap(sdata, false);
2232}
2233
9c6bd790
JB		 2234static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2235{
ad935687 2236 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2237 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2238 IEEE80211_STA_CONNECTION_POLL);
ad935687 2239
b291ba11 2240 /* let's probe the connection once */
42935eca 2241 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2242 &sdata->u.mgd.monitor_work);
2243 /* and do all the other regular work too */
42935eca 2244 ieee80211_queue_work(&sdata->local->hw,
46900298 2245 &sdata->u.mgd.work);
ad935687 2246 }
9c6bd790 2247}
f0706e82 2248
5bb644a0
JB		 2249#ifdef CONFIG_PM
2250void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2251{
2252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2253
2254 /*
2255 * we need to use atomic bitops for the running bits
2256 * only because both timers might fire at the same
2257 * time -- the code here is properly synchronised.
2258 */
2259
2260 cancel_work_sync(&ifmgd->work);
2261 cancel_work_sync(&ifmgd->beacon_loss_work);
2262 if (del_timer_sync(&ifmgd->timer))
2263 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2264
2265 cancel_work_sync(&ifmgd->chswitch_work);
2266 if (del_timer_sync(&ifmgd->chswitch_timer))
2267 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2268
2269 cancel_work_sync(&ifmgd->monitor_work);
2270 /* these will just be re-established on connection */
2271 del_timer_sync(&ifmgd->conn_mon_timer);
2272 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2273}
2274
2275void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2276{
2277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2278
2279 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2280 add_timer(&ifmgd->timer);
2281 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2282 add_timer(&ifmgd->chswitch_timer);
2283}
2284#endif
2285
9c6bd790
JB		 2286/* interface setup */
2287void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2288{
46900298 2289 struct ieee80211_if_managed *ifmgd;
988c0f72 2290
46900298
JB		 2291 ifmgd = &sdata->u.mgd;
2292 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2293 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2294 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2295 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2296 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2297 (unsigned long) sdata);
b291ba11
JB		 2298 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2299 (unsigned long) sdata);
2300 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2301 (unsigned long) sdata);
46900298 2302 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2303 (unsigned long) sdata);
46900298 2304 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2305
77fdaa12
JB		 2306 INIT_LIST_HEAD(&ifmgd->work_list);
2307
46900298 2308 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2309 ifmgd->flags = 0;
176be728 2310 if (sdata->local->hw.queues >= 4)
46900298 2311 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2312
77fdaa12 2313 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2314}
2315
77fdaa12
JB		 2316/* scan finished notification */
2317void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2318{
77fdaa12 2319 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2320
77fdaa12
JB		 2321 /* Restart STA timers */
2322 rcu_read_lock();
2323 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2324 ieee80211_restart_sta_timer(sdata);
2325 rcu_read_unlock();
2326}
60f8b39c 2327
77fdaa12
JB		 2328int ieee80211_max_network_latency(struct notifier_block *nb,
2329 unsigned long data, void *dummy)
2330{
2331 s32 latency_usec = (s32) data;
2332 struct ieee80211_local *local =
2333 container_of(nb, struct ieee80211_local,
2334 network_latency_notifier);
1fa6f4af 2335
77fdaa12
JB		 2336 mutex_lock(&local->iflist_mtx);
2337 ieee80211_recalc_ps(local, latency_usec);
2338 mutex_unlock(&local->iflist_mtx);
dfe67012 2339
77fdaa12 2340 return 0;
9c6bd790
JB		 2341}
2342
77fdaa12
JB		 2343/* config hooks */
2344int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2345 struct cfg80211_auth_request *req)
9c6bd790 2346{
46900298 2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2348 const u8 *ssid;
2349 struct ieee80211_mgd_work *wk;
2350 u16 auth_alg;
9c6bd790 2351
77fdaa12
JB		 2352 switch (req->auth_type) {
2353 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2354 auth_alg = WLAN_AUTH_OPEN;
2355 break;
2356 case NL80211_AUTHTYPE_SHARED_KEY:
2357 auth_alg = WLAN_AUTH_SHARED_KEY;
2358 break;
2359 case NL80211_AUTHTYPE_FT:
2360 auth_alg = WLAN_AUTH_FT;
2361 break;
2362 case NL80211_AUTHTYPE_NETWORK_EAP:
2363 auth_alg = WLAN_AUTH_LEAP;
2364 break;
2365 default:
2366 return -EOPNOTSUPP;
60f8b39c 2367 }
77fdaa12
JB		 2368
2369 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2370 if (!wk)
9c6bd790 2371 return -ENOMEM;
77fdaa12
JB		 2372
2373 wk->bss = (void *)req->bss;
2374
2375 if (req->ie && req->ie_len) {
2376 memcpy(wk->ie, req->ie, req->ie_len);
2377 wk->ie_len = req->ie_len;
9c6bd790 2378 }
77fdaa12 2379
fffd0934
JB		 2380 if (req->key && req->key_len) {
2381 wk->key_len = req->key_len;
2382 wk->key_idx = req->key_idx;
2383 memcpy(wk->key, req->key, req->key_len);
2384 }
2385
77fdaa12
JB		 2386 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2387 memcpy(wk->ssid, ssid + 2, ssid[1]);
2388 wk->ssid_len = ssid[1];
2389
2390 wk->state = IEEE80211_MGD_STATE_PROBE;
2391 wk->auth_alg = auth_alg;
48531847 2392 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2393
2394 /*
2395 * XXX: if still associated need to tell AP that we're going
2396 * to sleep and then change channel etc.
2397 */
2398 sdata->local->oper_channel = req->bss->channel;
2399 ieee80211_hw_config(sdata->local, 0);
2400
2401 mutex_lock(&ifmgd->mtx);
2402 list_add(&wk->list, &sdata->u.mgd.work_list);
2403 mutex_unlock(&ifmgd->mtx);
2404
42935eca 2405 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2406 return 0;
60f8b39c
JB		 2407}
2408
77fdaa12
JB		 2409int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2410 struct cfg80211_assoc_request *req)
f0706e82 2411{
77fdaa12
JB		 2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2413 struct ieee80211_mgd_work *wk, *found = NULL;
2414 int i, err;
f0706e82 2415
77fdaa12
JB		 2416 mutex_lock(&ifmgd->mtx);
2417
2418 list_for_each_entry(wk, &ifmgd->work_list, list) {
2419 if (&wk->bss->cbss == req->bss &&
2420 wk->state == IEEE80211_MGD_STATE_IDLE) {
2421 found = wk;
2422 break;
2423 }
2424 }
2425
2426 if (!found) {
2427 err = -ENOLINK;
2428 goto out;
2429 }
2430
2431 list_del(&found->list);
2432
2433 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2434 if (!wk) {
2435 list_add(&found->list, &ifmgd->work_list);
2436 err = -ENOMEM;
2437 goto out;
2438 }
2439
2440 list_add(&wk->list, &ifmgd->work_list);
2441
2442 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2443
2444 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2445 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2446 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2447 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2448 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2449
2450 sdata->local->oper_channel = req->bss->channel;
2451 ieee80211_hw_config(sdata->local, 0);
2452
2453 if (req->ie && req->ie_len) {
2454 memcpy(wk->ie, req->ie, req->ie_len);
2455 wk->ie_len = req->ie_len;
2456 } else
2457 wk->ie_len = 0;
2458
2459 if (req->prev_bssid)
2460 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2461
2462 wk->state = IEEE80211_MGD_STATE_ASSOC;
2463 wk->tries = 0;
48531847 2464 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2465
2466 if (req->use_mfp) {
2467 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2468 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2469 } else {
2470 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2471 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2472 }
2473
2474 if (req->crypto.control_port)
2475 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2476 else
2477 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2478
42935eca 2479 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2480
2481 err = 0;
2482
2483 out:
2484 mutex_unlock(&ifmgd->mtx);
2485 return err;
f0706e82
JB		 2486}
2487
77fdaa12 2488int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2489 struct cfg80211_deauth_request *req,
2490 void *cookie)
f0706e82 2491{
46900298 2492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2493 struct ieee80211_mgd_work *wk;
2494 const u8 *bssid = NULL;
f0706e82 2495
77fdaa12
JB		 2496 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2497 sdata->dev->name, req->reason_code);
2498
2499 mutex_lock(&ifmgd->mtx);
2500
2501 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2502 bssid = req->bss->bssid;
b291ba11 2503 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2504 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2505 if (&wk->bss->cbss == req->bss) {
2506 bssid = req->bss->bssid;
2507 list_del(&wk->list);
2508 kfree(wk);
2509 break;
2510 }
2511 }
f0706e82 2512
8d8b261a
JB		 2513 /*
2514 * cfg80211 should catch this ... but it's racy since
2515 * we can receive a deauth frame, process it, hand it
2516 * to cfg80211 while that's in a locked section already
2517 * trying to tell us that the user wants to disconnect.
2518 */
2519 if (!bssid) {
77fdaa12 2520 mutex_unlock(&ifmgd->mtx);
46900298 2521 return -ENOLINK;
77fdaa12
JB		 2522 }
2523
2524 mutex_unlock(&ifmgd->mtx);
2525
2526 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2527 IEEE80211_STYPE_DEAUTH, req->reason_code,
2528 cookie);
f0706e82 2529
f0706e82
JB		 2530 return 0;
2531}
84363e6e 2532
77fdaa12 2533int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2534 struct cfg80211_disassoc_request *req,
2535 void *cookie)
9c6bd790 2536{
77fdaa12 2537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2538
77fdaa12
JB		 2539 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2540 sdata->dev->name, req->reason_code);
10f644a4 2541
77fdaa12 2542 mutex_lock(&ifmgd->mtx);
10f644a4 2543
8d8b261a
JB		 2544 /*
2545 * cfg80211 should catch this ... but it's racy since
2546 * we can receive a disassoc frame, process it, hand it
2547 * to cfg80211 while that's in a locked section already
2548 * trying to tell us that the user wants to disconnect.
2549 */
2550 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2551 mutex_unlock(&ifmgd->mtx);
2552 return -ENOLINK;
2553 }
2554
b291ba11 2555 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2556
2557 mutex_unlock(&ifmgd->mtx);
10f644a4 2558
77fdaa12 2559 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2560 IEEE80211_STYPE_DISASSOC, req->reason_code,
2561 cookie);
10f644a4
JB		 2562 return 0;
2563}
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