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mac80211: fix scan cancel on ifdown
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82
JB		 29
30#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31#define IEEE80211_AUTH_MAX_TRIES 3
32#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33#define IEEE80211_ASSOC_MAX_TRIES 3
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)
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,
e21546a2 883 struct ieee80211_mgd_work *wk,
ae5eb026 884 u32 bss_info_changed)
f0706e82 885{
471b3efd 886 struct ieee80211_local *local = sdata->local;
e21546a2 887 struct ieee80211_bss *bss = wk->bss;
d6f2da5b 888
ae5eb026 889 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 890 /* set timing information */
891 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
892 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
893 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 894
77fdaa12
JB		 895 bss_info_changed |= BSS_CHANGED_BEACON_INT;
896 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
897 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 898
77fdaa12 899 sdata->u.mgd.associated = bss;
e21546a2 900 sdata->u.mgd.old_associate_work = wk;
77fdaa12 901 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 902
b291ba11
JB		 903 /* just to be sure */
904 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
905 IEEE80211_STA_BEACON_POLL);
906
9ac19a90 907 ieee80211_led_assoc(local, 1);
9306102e 908
bda3933a 909 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 910 /*
911 * For now just always ask the driver to update the basic rateset
912 * when we have associated, we aren't checking whether it actually
913 * changed or not.
914 */
ae5eb026 915 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 916
917 /* And the BSSID changed - we're associated now */
918 bss_info_changed |= BSS_CHANGED_BSSID;
919
ae5eb026 920 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 921
056508dc
JB		 922 mutex_lock(&local->iflist_mtx);
923 ieee80211_recalc_ps(local, -1);
924 mutex_unlock(&local->iflist_mtx);
e0cb686f 925
9ac19a90
JB		 926 netif_tx_start_all_queues(sdata->dev);
927 netif_carrier_on(sdata->dev);
f0706e82
JB		 928}
929
77fdaa12
JB		 930static enum rx_mgmt_action __must_check
931ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
932 struct ieee80211_mgd_work *wk)
f0706e82 933{
46900298 934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 935 struct ieee80211_local *local = sdata->local;
46900298 936
77fdaa12
JB		 937 wk->tries++;
938 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 939 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 940 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 941
942 /*
943 * Most likely AP is not in the range so remove the
77fdaa12 944 * bss struct for that AP.
7a947080 945 */
77fdaa12 946 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 947
948 /*
949 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 950 * due to work needing to be done. Hence, queue the STAs work
951 * again for that.
11432379 952 */
42935eca 953 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 954 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 955 }
f0706e82 956
77fdaa12
JB		 957 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
958 sdata->dev->name, wk->bss->cbss.bssid,
959 wk->tries);
f0706e82 960
77fdaa12
JB		 961 /*
962 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 963 * will not answer to direct packet in unassociated state.
964 */
77fdaa12
JB		 965 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
966
967 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 968 run_again(ifmgd, wk->timeout);
9ac19a90 969
77fdaa12 970 return RX_MGMT_NONE;
60f8b39c 971}
f0706e82 972
9ac19a90 973
77fdaa12
JB		 974static enum rx_mgmt_action __must_check
975ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_mgd_work *wk)
f0706e82 977{
46900298 978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 979 struct ieee80211_local *local = sdata->local;
46900298 980
77fdaa12
JB		 981 wk->tries++;
982 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 983 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 984 " timed out\n",
77fdaa12
JB		 985 sdata->dev->name, wk->bss->cbss.bssid);
986
987 /*
988 * Most likely AP is not in the range so remove the
989 * bss struct for that AP.
990 */
991 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 992
993 /*
994 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 995 * due to work needing to be done. Hence, queue the STAs work
996 * again for that.
11432379 997 */
42935eca 998 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 999 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1000 }
f0706e82 1001
77fdaa12
JB		 1002 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1003 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1004
1005 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1006 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1007 wk->auth_transaction = 2;
f0706e82 1008
77fdaa12 1009 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1010 run_again(ifmgd, wk->timeout);
9ac19a90 1011
77fdaa12 1012 return RX_MGMT_NONE;
f0706e82
JB		 1013}
1014
e21546a2
JB		 1015static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1016 bool deauth)
aa458d17 1017{
46900298 1018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1019 struct ieee80211_local *local = sdata->local;
1020 struct sta_info *sta;
e0cb686f 1021 u32 changed = 0, config_changed = 0;
b291ba11 1022 u8 bssid[ETH_ALEN];
aa458d17 1023
77fdaa12
JB		 1024 ASSERT_MGD_MTX(ifmgd);
1025
b291ba11
JB		 1026 if (WARN_ON(!ifmgd->associated))
1027 return;
1028
1029 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1030
77fdaa12
JB		 1031 ifmgd->associated = NULL;
1032 memset(ifmgd->bssid, 0, ETH_ALEN);
1033
e21546a2
JB		 1034 if (deauth) {
1035 kfree(ifmgd->old_associate_work);
1036 ifmgd->old_associate_work = NULL;
1037 } else {
1038 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1039
1040 wk->state = IEEE80211_MGD_STATE_IDLE;
1041 list_add(&wk->list, &ifmgd->work_list);
1042 }
1043
77fdaa12
JB		 1044 /*
1045 * we need to commit the associated = NULL change because the
1046 * scan code uses that to determine whether this iface should
1047 * go to/wake up from powersave or not -- and could otherwise
1048 * wake the queues erroneously.
1049 */
1050 smp_mb();
1051
1052 /*
1053 * Thus, we can only afterwards stop the queues -- to account
1054 * for the case where another CPU is finishing a scan at this
1055 * time -- we don't want the scan code to enable queues.
1056 */
aa458d17 1057
24e64622 1058 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1059 netif_carrier_off(sdata->dev);
1060
1fa6f4af 1061 rcu_read_lock();
77fdaa12 1062 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1063 if (sta)
1064 ieee80211_sta_tear_down_BA_sessions(sta);
1065 rcu_read_unlock();
aa458d17 1066
f5e5bf25
TW		 1067 changed |= ieee80211_reset_erp_info(sdata);
1068
f5e5bf25 1069 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1070 changed |= BSS_CHANGED_ASSOC;
1071 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1072
aa837e1d
JB		 1073 ieee80211_set_wmm_default(sdata);
1074
5cff20e6
JB		 1075 ieee80211_recalc_idle(local);
1076
4797938c 1077 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1078 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1079
413ad50a
JB		 1080 /* on the next assoc, re-program HT parameters */
1081 sdata->ht_opmode_valid = false;
1082
a8302de9
VT		 1083 local->power_constr_level = 0;
1084
520eb820
KV		 1085 del_timer_sync(&local->dynamic_ps_timer);
1086 cancel_work_sync(&local->dynamic_ps_enable_work);
1087
e0cb686f
KV		 1088 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1089 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1090 config_changed |= IEEE80211_CONF_CHANGE_PS;
1091 }
ae5eb026 1092
e0cb686f 1093 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1094
1095 /* And the BSSID changed -- not very interesting here */
1096 changed |= BSS_CHANGED_BSSID;
ae5eb026 1097 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1098
1099 rcu_read_lock();
1100
77fdaa12 1101 sta = sta_info_get(local, bssid);
8e268e47
TW		 1102 if (!sta) {
1103 rcu_read_unlock();
1104 return;
1105 }
1106
1107 sta_info_unlink(&sta);
1108
1109 rcu_read_unlock();
1110
1111 sta_info_destroy(sta);
aa458d17 1112}
f0706e82 1113
77fdaa12
JB		 1114static enum rx_mgmt_action __must_check
1115ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1116 struct ieee80211_mgd_work *wk)
f0706e82 1117{
46900298 1118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1119 struct ieee80211_local *local = sdata->local;
46900298 1120
77fdaa12
JB		 1121 wk->tries++;
1122 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1123 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1124 " timed out\n",
77fdaa12
JB		 1125 sdata->dev->name, wk->bss->cbss.bssid);
1126
1127 /*
1128 * Most likely AP is not in the range so remove the
1129 * bss struct for that AP.
1130 */
1131 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1132
11432379
HS		 1133 /*
1134 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1135 * due to work needing to be done. Hence, queue the STAs work
1136 * again for that.
11432379 1137 */
42935eca 1138 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1139 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1140 }
1141
77fdaa12
JB		 1142 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1143 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1144 ieee80211_send_assoc(sdata, wk);
1145
1146 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1147 run_again(ifmgd, wk->timeout);
f0706e82 1148
77fdaa12 1149 return RX_MGMT_NONE;
f0706e82
JB		 1150}
1151
3cf335d5
KV		 1152void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_hdr *hdr)
1154{
1155 /*
1156 * We can postpone the mgd.timer whenever receiving unicast frames
1157 * from AP because we know that the connection is working both ways
1158 * at that time. But multicast frames (and hence also beacons) must
1159 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1160 * data idle periods for sending the periodic probe request to the
1161 * AP we're connected to.
3cf335d5 1162 */
b291ba11
JB		 1163 if (is_multicast_ether_addr(hdr->addr1))
1164 return;
1165
1166 mod_timer(&sdata->u.mgd.conn_mon_timer,
1167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1168}
f0706e82 1169
a43abf29
ML		 1170static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1171{
1172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1173 const u8 *ssid;
1174
1175 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1176 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1177 ssid + 2, ssid[1], NULL, 0);
1178
1179 ifmgd->probe_send_count++;
1180 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1181 run_again(ifmgd, ifmgd->probe_timeout);
1182}
1183
b291ba11
JB		 1184static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1185 bool beacon)
04de8381 1186{
04de8381 1187 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1188 bool already = false;
34bfc411 1189
0e2b6286
JB		 1190 if (!netif_running(sdata->dev))
1191 return;
1192
91a3bd76
LR		 1193 if (sdata->local->scanning)
1194 return;
1195
77fdaa12
JB		 1196 mutex_lock(&ifmgd->mtx);
1197
1198 if (!ifmgd->associated)
1199 goto out;
1200
a860402d 1201#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1202 if (beacon && net_ratelimit())
1203 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1204 "- sending probe request\n", sdata->dev->name);
a860402d 1205#endif
04de8381 1206
b291ba11
JB		 1207 /*
1208 * The driver/our work has already reported this event or the
1209 * connection monitoring has kicked in and we have already sent
1210 * a probe request. Or maybe the AP died and the driver keeps
1211 * reporting until we disassociate...
1212 *
1213 * In either case we have to ignore the current call to this
1214 * function (except for setting the correct probe reason bit)
1215 * because otherwise we would reset the timer every time and
1216 * never check whether we received a probe response!
1217 */
1218 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1219 IEEE80211_STA_CONNECTION_POLL))
1220 already = true;
1221
1222 if (beacon)
1223 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1224 else
1225 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1226
1227 if (already)
1228 goto out;
1229
4e751843
JB		 1230 mutex_lock(&sdata->local->iflist_mtx);
1231 ieee80211_recalc_ps(sdata->local, -1);
1232 mutex_unlock(&sdata->local->iflist_mtx);
1233
a43abf29
ML		 1234 ifmgd->probe_send_count = 0;
1235 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1236 out:
1237 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1238}
1239
b291ba11
JB		 1240void ieee80211_beacon_loss_work(struct work_struct *work)
1241{
1242 struct ieee80211_sub_if_data *sdata =
1243 container_of(work, struct ieee80211_sub_if_data,
1244 u.mgd.beacon_loss_work);
1245
1246 ieee80211_mgd_probe_ap(sdata, true);
1247}
1248
04de8381
KV		 1249void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1250{
1251 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1252
42935eca 1253 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1254}
1255EXPORT_SYMBOL(ieee80211_beacon_loss);
1256
77fdaa12
JB		 1257static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1258 struct ieee80211_mgd_work *wk)
f0706e82 1259{
77fdaa12 1260 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1261 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1262}
1263
1264
f698d856 1265static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1266 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1267 struct ieee80211_mgmt *mgmt,
1268 size_t len)
1269{
1270 u8 *pos;
1271 struct ieee802_11_elems elems;
1272
f0706e82 1273 pos = mgmt->u.auth.variable;
67a4cce4 1274 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1275 if (!elems.challenge)
f0706e82 1276 return;
77fdaa12 1277 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1278 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1279 wk->bss->cbss.bssid,
1280 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1281 wk->auth_transaction = 4;
fe3d2c3f
JB		 1282}
1283
77fdaa12
JB		 1284static enum rx_mgmt_action __must_check
1285ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1286 struct ieee80211_mgd_work *wk,
1287 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1288{
f0706e82
JB		 1289 u16 auth_alg, auth_transaction, status_code;
1290
77fdaa12
JB		 1291 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1292 return RX_MGMT_NONE;
f0706e82 1293
f4ea83dd 1294 if (len < 24 + 6)
77fdaa12 1295 return RX_MGMT_NONE;
f0706e82 1296
77fdaa12
JB		 1297 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1298 return RX_MGMT_NONE;
f0706e82 1299
77fdaa12
JB		 1300 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1301 return RX_MGMT_NONE;
f0706e82
JB		 1302
1303 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1304 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1305 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1306
77fdaa12
JB		 1307 if (auth_alg != wk->auth_alg ||
1308 auth_transaction != wk->auth_transaction)
1309 return RX_MGMT_NONE;
f0706e82
JB		 1310
1311 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1312 list_del(&wk->list);
1313 kfree(wk);
1314 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1315 }
1316
77fdaa12 1317 switch (wk->auth_alg) {
f0706e82
JB		 1318 case WLAN_AUTH_OPEN:
1319 case WLAN_AUTH_LEAP:
636a5d36 1320 case WLAN_AUTH_FT:
77fdaa12
JB		 1321 ieee80211_auth_completed(sdata, wk);
1322 return RX_MGMT_CFG80211_AUTH;
f0706e82 1323 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1324 if (wk->auth_transaction == 4) {
1325 ieee80211_auth_completed(sdata, wk);
1326 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1327 } else
77fdaa12 1328 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1329 break;
1330 }
77fdaa12
JB		 1331
1332 return RX_MGMT_NONE;
f0706e82
JB		 1333}
1334
1335
77fdaa12
JB		 1336static enum rx_mgmt_action __must_check
1337ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1338 struct ieee80211_mgd_work *wk,
1339 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1340{
46900298 1341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1342 const u8 *bssid = NULL;
f0706e82
JB		 1343 u16 reason_code;
1344
f4ea83dd 1345 if (len < 24 + 2)
77fdaa12 1346 return RX_MGMT_NONE;
f0706e82 1347
77fdaa12
JB		 1348 ASSERT_MGD_MTX(ifmgd);
1349
1350 if (wk)
1351 bssid = wk->bss->cbss.bssid;
1352 else
1353 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1354
1355 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1356
77fdaa12
JB		 1357 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1358 sdata->dev->name, bssid, reason_code);
1359
1360 if (!wk) {
e21546a2 1361 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 1362 } else {
1363 list_del(&wk->list);
1364 kfree(wk);
1365 }
f0706e82 1366
77fdaa12 1367 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1368}
1369
1370
77fdaa12
JB		 1371static enum rx_mgmt_action __must_check
1372ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1373 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1374{
46900298 1375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1376 u16 reason_code;
1377
f4ea83dd 1378 if (len < 24 + 2)
77fdaa12 1379 return RX_MGMT_NONE;
f0706e82 1380
77fdaa12
JB		 1381 ASSERT_MGD_MTX(ifmgd);
1382
1383 if (WARN_ON(!ifmgd->associated))
1384 return RX_MGMT_NONE;
1385
1386 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1387 return RX_MGMT_NONE;
f0706e82
JB		 1388
1389 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1390
77fdaa12
JB		 1391 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1392 sdata->dev->name, reason_code);
f0706e82 1393
e21546a2 1394 ieee80211_set_disassoc(sdata, false);
77fdaa12 1395 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1396}
1397
1398
77fdaa12
JB		 1399static enum rx_mgmt_action __must_check
1400ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1401 struct ieee80211_mgd_work *wk,
1402 struct ieee80211_mgmt *mgmt, size_t len,
1403 bool reassoc)
f0706e82 1404{
46900298 1405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1406 struct ieee80211_local *local = sdata->local;
8318d78a 1407 struct ieee80211_supported_band *sband;
f0706e82 1408 struct sta_info *sta;
881d948c 1409 u32 rates, basic_rates;
f0706e82
JB		 1410 u16 capab_info, status_code, aid;
1411 struct ieee802_11_elems elems;
bda3933a 1412 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1413 u8 *pos;
ae5eb026 1414 u32 changed = 0;
f0706e82 1415 int i, j;
ddf4ac53 1416 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1417 u16 ap_ht_cap_flags;
f0706e82 1418
77fdaa12
JB		 1419 /*
1420 * AssocResp and ReassocResp have identical structure, so process both
1421 * of them in this function.
1422 */
f0706e82 1423
f4ea83dd 1424 if (len < 24 + 6)
77fdaa12 1425 return RX_MGMT_NONE;
f0706e82 1426
77fdaa12
JB		 1427 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1428 return RX_MGMT_NONE;
f0706e82
JB		 1429
1430 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1431 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1432 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1433
0c68ae26 1434 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1435 "status=%d aid=%d)\n",
0c68ae26 1436 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1437 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1438
63a5ab82
JM		 1439 pos = mgmt->u.assoc_resp.variable;
1440 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1441
1442 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1443 elems.timeout_int && elems.timeout_int_len == 5 &&
1444 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1445 u32 tu, ms;
f797eb7e 1446 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1447 ms = tu * 1024 / 1000;
1448 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1449 "comeback duration %u TU (%u ms)\n",
1450 sdata->dev->name, tu, ms);
77fdaa12 1451 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1452 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1453 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1454 return RX_MGMT_NONE;
63a5ab82
JM		 1455 }
1456
f0706e82
JB		 1457 if (status_code != WLAN_STATUS_SUCCESS) {
1458 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1459 sdata->dev->name, status_code);
77fdaa12
JB		 1460 list_del(&wk->list);
1461 kfree(wk);
1462 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1463 }
1464
1dd84aa2
JB		 1465 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1466 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1467 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1468 aid &= ~(BIT(15) | BIT(14));
1469
f0706e82
JB		 1470 if (!elems.supp_rates) {
1471 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1472 sdata->dev->name);
77fdaa12 1473 return RX_MGMT_NONE;
f0706e82
JB		 1474 }
1475
f698d856 1476 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1477 ifmgd->aid = aid;
f0706e82 1478
d0709a65
JB		 1479 rcu_read_lock();
1480
f0706e82 1481 /* Add STA entry for the AP */
77fdaa12 1482 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1483 if (!sta) {
ddf4ac53 1484 newsta = true;
d0709a65 1485
77fdaa12
JB		 1486 rcu_read_unlock();
1487
1488 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1489 if (!sta) {
1490 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1491 " the AP\n", sdata->dev->name);
77fdaa12 1492 return RX_MGMT_NONE;
f0706e82 1493 }
f709fc69 1494
77fdaa12
JB		 1495 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1496 WLAN_STA_ASSOC_AP);
1497 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1498 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1499
77fdaa12
JB		 1500 rcu_read_lock();
1501 }
05e5e883 1502
60f8b39c
JB		 1503 rates = 0;
1504 basic_rates = 0;
1505 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1506
60f8b39c
JB		 1507 for (i = 0; i < elems.supp_rates_len; i++) {
1508 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1509 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1510
60f8b39c
JB		 1511 if (rate > 110)
1512 have_higher_than_11mbit = true;
1513
1514 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1515 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1516 rates |= BIT(j);
d61272cb
TW		 1517 if (is_basic)
1518 basic_rates |= BIT(j);
1519 break;
1520 }
f709fc69 1521 }
f709fc69
LCC		 1522 }
1523
60f8b39c
JB		 1524 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1525 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1526 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1527
60f8b39c
JB		 1528 if (rate > 110)
1529 have_higher_than_11mbit = true;
f0706e82 1530
60f8b39c 1531 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1532 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1533 rates |= BIT(j);
d61272cb
TW		 1534 if (is_basic)
1535 basic_rates |= BIT(j);
1536 break;
1537 }
60f8b39c 1538 }
1ebebea8 1539 }
f0706e82 1540
323ce79a 1541 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1542 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1543
1544 /* cf. IEEE 802.11 9.2.12 */
1545 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1546 have_higher_than_11mbit)
1547 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1548 else
1549 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1550
ab1faead 1551 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1552 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1553 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1554
1555 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1556
4b7679a5 1557 rate_control_rate_init(sta);
f0706e82 1558
46900298 1559 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1560 set_sta_flags(sta, WLAN_STA_MFP);
1561
ddf4ac53 1562 if (elems.wmm_param)
60f8b39c 1563 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1564
1565 if (newsta) {
1566 int err = sta_info_insert(sta);
1567 if (err) {
1568 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1569 " the AP (error %d)\n", sdata->dev->name, err);
1570 rcu_read_unlock();
77fdaa12 1571 return RX_MGMT_NONE;
ddf4ac53
JB		 1572 }
1573 }
1574
1575 rcu_read_unlock();
1576
1577 if (elems.wmm_param)
46900298 1578 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1579 elems.wmm_param_len);
aa837e1d
JB		 1580 else
1581 ieee80211_set_wmm_default(sdata);
f0706e82 1582
ae5eb026 1583 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1584 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1585 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1586 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1587 wk->bss->cbss.bssid,
ae5eb026
JB		 1588 ap_ht_cap_flags);
1589
056508dc
JB		 1590 /* delete work item -- must be before set_associated for PS */
1591 list_del(&wk->list);
1592
60f8b39c
JB		 1593 /* set AID and assoc capability,
1594 * ieee80211_set_associated() will tell the driver */
1595 bss_conf->aid = aid;
1596 bss_conf->assoc_capability = capab_info;
e21546a2
JB		 1597 /* this will take ownership of wk */
1598 ieee80211_set_associated(sdata, wk, changed);
f0706e82 1599
15b7b062 1600 /*
b291ba11
JB		 1601 * Start timer to probe the connection to the AP now.
1602 * Also start the timer that will detect beacon loss.
15b7b062 1603 */
b291ba11
JB		 1604 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1605 mod_beacon_timer(sdata);
15b7b062 1606
77fdaa12 1607 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1608}
1609
1610
98c8fccf
JB		 1611static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1612 struct ieee80211_mgmt *mgmt,
1613 size_t len,
1614 struct ieee80211_rx_status *rx_status,
1615 struct ieee802_11_elems *elems,
1616 bool beacon)
1617{
1618 struct ieee80211_local *local = sdata->local;
1619 int freq;
c2b13452 1620 struct ieee80211_bss *bss;
98c8fccf 1621 struct ieee80211_channel *channel;
98c8fccf
JB		 1622
1623 if (elems->ds_params && elems->ds_params_len == 1)
1624 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1625 else
1626 freq = rx_status->freq;
1627
1628 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1629
1630 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1631 return;
1632
98c8fccf 1633 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1634 channel, beacon);
77fdaa12
JB		 1635 if (bss)
1636 ieee80211_rx_bss_put(local, bss);
1637
1638 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1639 return;
1640
c481ec97 1641 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1642 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1643 ETH_ALEN) == 0)) {
c481ec97
S		 1644 struct ieee80211_channel_sw_ie *sw_elem =
1645 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1646 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1647 }
f0706e82
JB		 1648}
1649
1650
f698d856 1651static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1652 struct ieee80211_mgd_work *wk,
1653 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1654 struct ieee80211_rx_status *rx_status)
1655{
15b7b062 1656 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1657 size_t baselen;
1658 struct ieee802_11_elems elems;
1659
15b7b062
KV		 1660 ifmgd = &sdata->u.mgd;
1661
77fdaa12
JB		 1662 ASSERT_MGD_MTX(ifmgd);
1663
8e7cdbb6
TW		 1664 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1665 return; /* ignore ProbeResp to foreign address */
1666
ae6a44e3
EK		 1667 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1668 if (baselen > len)
1669 return;
1670
1671 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1672 &elems);
1673
98c8fccf 1674 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1675
1676 /* direct probe may be part of the association flow */
77fdaa12 1677 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1678 printk(KERN_DEBUG "%s direct probe responded\n",
1679 sdata->dev->name);
77fdaa12
JB		 1680 wk->tries = 0;
1681 wk->state = IEEE80211_MGD_STATE_AUTH;
1682 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1683 }
15b7b062 1684
77fdaa12
JB		 1685 if (ifmgd->associated &&
1686 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1687 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1688 IEEE80211_STA_CONNECTION_POLL)) {
1689 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1690 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1691 mutex_lock(&sdata->local->iflist_mtx);
1692 ieee80211_recalc_ps(sdata->local, -1);
1693 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1694 /*
1695 * We've received a probe response, but are not sure whether
1696 * we have or will be receiving any beacons or data, so let's
1697 * schedule the timers again, just in case.
1698 */
1699 mod_beacon_timer(sdata);
1700 mod_timer(&ifmgd->conn_mon_timer,
1701 round_jiffies_up(jiffies +
1702 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1703 }
f0706e82
JB		 1704}
1705
d91f36db
JB		 1706/*
1707 * This is the canonical list of information elements we care about,
1708 * the filter code also gives us all changes to the Microsoft OUI
1709 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1710 *
1711 * We implement beacon filtering in software since that means we can
1712 * avoid processing the frame here and in cfg80211, and userspace
1713 * will not be able to tell whether the hardware supports it or not.
1714 *
1715 * XXX: This list needs to be dynamic -- userspace needs to be able to
1716 * add items it requires. It also needs to be able to tell us to
1717 * look out for other vendor IEs.
1718 */
1719static const u64 care_about_ies =
1d4df3a5
JB		 1720 (1ULL << WLAN_EID_COUNTRY) |
1721 (1ULL << WLAN_EID_ERP_INFO) |
1722 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1723 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1724 (1ULL << WLAN_EID_HT_CAPABILITY) |
1725 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1726
f698d856 1727static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1728 struct ieee80211_mgmt *mgmt,
1729 size_t len,
1730 struct ieee80211_rx_status *rx_status)
1731{
d91f36db 1732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1733 size_t baselen;
1734 struct ieee802_11_elems elems;
f698d856 1735 struct ieee80211_local *local = sdata->local;
471b3efd 1736 u32 changed = 0;
d91f36db 1737 bool erp_valid, directed_tim = false;
7a5158ef 1738 u8 erp_value = 0;
d91f36db 1739 u32 ncrc;
77fdaa12
JB		 1740 u8 *bssid;
1741
1742 ASSERT_MGD_MTX(ifmgd);
f0706e82 1743
ae6a44e3
EK		 1744 /* Process beacon from the current BSS */
1745 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1746 if (baselen > len)
1747 return;
1748
d91f36db 1749 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1750 return;
f0706e82 1751
b291ba11
JB		 1752 /*
1753 * We might have received a number of frames, among them a
1754 * disassoc frame and a beacon...
1755 */
1756 if (!ifmgd->associated)
77fdaa12
JB		 1757 return;
1758
1759 bssid = ifmgd->associated->cbss.bssid;
1760
b291ba11
JB		 1761 /*
1762 * And in theory even frames from a different AP we were just
1763 * associated to a split-second ago!
1764 */
1765 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1766 return;
1767
b291ba11 1768 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1769#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1770 if (net_ratelimit()) {
1771 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1772 "to a received beacon\n", sdata->dev->name);
1773 }
1774#endif
b291ba11 1775 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1776 mutex_lock(&local->iflist_mtx);
1777 ieee80211_recalc_ps(local, -1);
1778 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1779 }
1780
b291ba11
JB		 1781 /*
1782 * Push the beacon loss detection into the future since
1783 * we are processing a beacon from the AP just now.
1784 */
1785 mod_beacon_timer(sdata);
1786
d91f36db
JB		 1787 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1788 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1789 len - baselen, &elems,
1790 care_about_ies, ncrc);
1791
1792 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1793 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1794 ifmgd->aid);
d91f36db 1795
30196673
JM		 1796 if (ncrc != ifmgd->beacon_crc) {
1797 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1798 true);
d91f36db 1799
30196673
JM		 1800 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1801 elems.wmm_param_len);
1802 }
fe3fa827 1803
25c9c875 1804 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1805 if (directed_tim) {
572e0012
KV		 1806 if (local->hw.conf.dynamic_ps_timeout > 0) {
1807 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1808 ieee80211_hw_config(local,
1809 IEEE80211_CONF_CHANGE_PS);
1810 ieee80211_send_nullfunc(local, sdata, 0);
1811 } else {
1812 local->pspolling = true;
1813
1814 /*
1815 * Here is assumed that the driver will be
1816 * able to send ps-poll frame and receive a
1817 * response even though power save mode is
1818 * enabled, but some drivers might require
1819 * to disable power save here. This needs
1820 * to be investigated.
1821 */
1822 ieee80211_send_pspoll(local, sdata);
1823 }
a97b77b9
VN		 1824 }
1825 }
7a5158ef 1826
30196673
JM		 1827 if (ncrc == ifmgd->beacon_crc)
1828 return;
1829 ifmgd->beacon_crc = ncrc;
1830
7a5158ef
JB		 1831 if (elems.erp_info && elems.erp_info_len >= 1) {
1832 erp_valid = true;
1833 erp_value = elems.erp_info[0];
1834 } else {
1835 erp_valid = false;
50c4afb9 1836 }
7a5158ef
JB		 1837 changed |= ieee80211_handle_bss_capability(sdata,
1838 le16_to_cpu(mgmt->u.beacon.capab_info),
1839 erp_valid, erp_value);
f0706e82 1840
d3c990fb 1841
53d6f81c 1842 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1843 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1844 struct sta_info *sta;
1845 struct ieee80211_supported_band *sband;
1846 u16 ap_ht_cap_flags;
1847
1848 rcu_read_lock();
1849
77fdaa12
JB		 1850 sta = sta_info_get(local, bssid);
1851 if (WARN_ON(!sta)) {
ae5eb026
JB		 1852 rcu_read_unlock();
1853 return;
1854 }
1855
1856 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1857
1858 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1859 elems.ht_cap_elem, &sta->sta.ht_cap);
1860
1861 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1862
1863 rcu_read_unlock();
1864
1865 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1866 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1867 }
1868
8b19e6ca 1869 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1870 if (elems.country_elem) {
a8302de9
VT		 1871 /* TODO: IBSS also needs this */
1872 if (elems.pwr_constr_elem)
1873 ieee80211_handle_pwr_constr(sdata,
1874 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1875 elems.pwr_constr_elem,
1876 elems.pwr_constr_elem_len);
3f2355cb
LR		 1877 }
1878
471b3efd 1879 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1880}
1881
46900298 1882ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1883 struct sk_buff *skb)
f0706e82 1884{
f698d856 1885 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1886 struct ieee80211_mgmt *mgmt;
1887 u16 fc;
1888
1889 if (skb->len < 24)
46900298 1890 return RX_DROP_MONITOR;
f0706e82
JB		 1891
1892 mgmt = (struct ieee80211_mgmt *) skb->data;
1893 fc = le16_to_cpu(mgmt->frame_control);
1894
1895 switch (fc & IEEE80211_FCTL_STYPE) {
1896 case IEEE80211_STYPE_PROBE_REQ:
1897 case IEEE80211_STYPE_PROBE_RESP:
1898 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1899 case IEEE80211_STYPE_AUTH:
1900 case IEEE80211_STYPE_ASSOC_RESP:
1901 case IEEE80211_STYPE_REASSOC_RESP:
1902 case IEEE80211_STYPE_DEAUTH:
1903 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1904 case IEEE80211_STYPE_ACTION:
46900298 1905 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1906 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1907 return RX_QUEUED;
f0706e82
JB		 1908 }
1909
46900298 1910 return RX_DROP_MONITOR;
f0706e82
JB		 1911}
1912
f698d856 1913static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1914 struct sk_buff *skb)
1915{
77fdaa12 1916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1917 struct ieee80211_rx_status *rx_status;
f0706e82 1918 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1919 struct ieee80211_mgd_work *wk;
1920 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1921 u16 fc;
1922
f0706e82
JB		 1923 rx_status = (struct ieee80211_rx_status *) skb->cb;
1924 mgmt = (struct ieee80211_mgmt *) skb->data;
1925 fc = le16_to_cpu(mgmt->frame_control);
1926
77fdaa12
JB		 1927 mutex_lock(&ifmgd->mtx);
1928
1929 if (ifmgd->associated &&
1930 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1931 ETH_ALEN) == 0) {
1932 switch (fc & IEEE80211_FCTL_STYPE) {
1933 case IEEE80211_STYPE_BEACON:
1934 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1935 rx_status);
1936 break;
1937 case IEEE80211_STYPE_PROBE_RESP:
1938 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1939 skb->len, rx_status);
1940 break;
1941 case IEEE80211_STYPE_DEAUTH:
1942 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1943 mgmt, skb->len);
1944 break;
1945 case IEEE80211_STYPE_DISASSOC:
1946 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1947 break;
1948 case IEEE80211_STYPE_ACTION:
1949 /* XXX: differentiate, can only happen for CSA now! */
1950 ieee80211_sta_process_chanswitch(sdata,
1951 &mgmt->u.action.u.chan_switch.sw_elem,
1952 ifmgd->associated);
1953 break;
1954 }
1955 mutex_unlock(&ifmgd->mtx);
1956
1957 switch (rma) {
1958 case RX_MGMT_NONE:
1959 /* no action */
1960 break;
1961 case RX_MGMT_CFG80211_DEAUTH:
667503dd
JB		 1962 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1963 NULL);
77fdaa12
JB		 1964 break;
1965 case RX_MGMT_CFG80211_DISASSOC:
667503dd
JB		 1966 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1967 NULL);
77fdaa12
JB		 1968 break;
1969 default:
1970 WARN(1, "unexpected: %d", rma);
1971 }
1972 goto out;
1973 }
1974
1975 list_for_each_entry(wk, &ifmgd->work_list, list) {
1976 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1977 continue;
1978
1979 switch (fc & IEEE80211_FCTL_STYPE) {
1980 case IEEE80211_STYPE_PROBE_RESP:
1981 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1982 rx_status);
1983 break;
1984 case IEEE80211_STYPE_AUTH:
1985 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1986 break;
1987 case IEEE80211_STYPE_ASSOC_RESP:
1988 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1989 skb->len, false);
1990 break;
1991 case IEEE80211_STYPE_REASSOC_RESP:
1992 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1993 skb->len, true);
1994 break;
1995 case IEEE80211_STYPE_DEAUTH:
1996 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1997 skb->len);
1998 break;
1999 }
2000 /*
2001 * We've processed this frame for that work, so it can't
2002 * belong to another work struct.
2003 * NB: this is also required for correctness because the
2004 * called functions can free 'wk', and for 'rma'!
2005 */
46900298 2006 break;
77fdaa12
JB		 2007 }
2008
2009 mutex_unlock(&ifmgd->mtx);
2010
2011 switch (rma) {
2012 case RX_MGMT_NONE:
2013 /* no action */
46900298 2014 break;
77fdaa12 2015 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2016 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2017 break;
77fdaa12 2018 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2019 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2020 break;
8d8b261a
JB		 2021 case RX_MGMT_CFG80211_DEAUTH:
2022 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
2023 break;
77fdaa12
JB		 2024 default:
2025 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2026 }
2027
77fdaa12 2028 out:
f0706e82
JB		 2029 kfree_skb(skb);
2030}
2031
9c6bd790 2032static void ieee80211_sta_timer(unsigned long data)
f0706e82 2033{
60f8b39c
JB		 2034 struct ieee80211_sub_if_data *sdata =
2035 (struct ieee80211_sub_if_data *) data;
46900298 2036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2037 struct ieee80211_local *local = sdata->local;
f0706e82 2038
5bb644a0
JB		 2039 if (local->quiescing) {
2040 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2041 return;
2042 }
2043
42935eca 2044 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2045}
2046
9c6bd790
JB		 2047static void ieee80211_sta_work(struct work_struct *work)
2048{
2049 struct ieee80211_sub_if_data *sdata =
46900298 2050 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2051 struct ieee80211_local *local = sdata->local;
46900298 2052 struct ieee80211_if_managed *ifmgd;
9c6bd790 2053 struct sk_buff *skb;
77fdaa12
JB		 2054 struct ieee80211_mgd_work *wk, *tmp;
2055 LIST_HEAD(free_work);
2056 enum rx_mgmt_action rma;
2057 bool anybusy = false;
9c6bd790
JB		 2058
2059 if (!netif_running(sdata->dev))
2060 return;
2061
fbe9c429 2062 if (local->scanning)
9c6bd790
JB		 2063 return;
2064
46900298 2065 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2066 return;
5bb644a0
JB		 2067
2068 /*
42935eca
LR		 2069 * ieee80211_queue_work() should have picked up most cases,
2070 * here we'll pick the the rest.
5bb644a0 2071 */
42935eca
LR		 2072 if (WARN(local->suspended, "STA MLME work scheduled while "
2073 "going to suspend\n"))
5bb644a0
JB		 2074 return;
2075
46900298 2076 ifmgd = &sdata->u.mgd;
f0706e82 2077
77fdaa12 2078 /* first process frames to avoid timing out while a frame is pending */
46900298 2079 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2080 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2081
77fdaa12
JB		 2082 /* then process the rest of the work */
2083 mutex_lock(&ifmgd->mtx);
2084
b291ba11
JB		 2085 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2086 IEEE80211_STA_CONNECTION_POLL) &&
2087 ifmgd->associated) {
a43abf29
ML		 2088 u8 bssid[ETH_ALEN];
2089
2090 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2091 if (time_is_after_jiffies(ifmgd->probe_timeout))
2092 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2093
2094 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2095#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2096 printk(KERN_DEBUG "No probe response from AP %pM"
2097 " after %dms, try %d\n", bssid,
2098 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2099 ifmgd->probe_send_count);
2100#endif
2101 ieee80211_mgd_probe_ap_send(sdata);
2102 } else {
b291ba11
JB		 2103 /*
2104 * We actually lost the connection ... or did we?
2105 * Let's make sure!
2106 */
2107 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2108 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2109 printk(KERN_DEBUG "No probe response from AP %pM"
2110 " after %dms, disconnecting.\n",
2111 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e21546a2 2112 ieee80211_set_disassoc(sdata, true);
b291ba11
JB		 2113 mutex_unlock(&ifmgd->mtx);
2114 /*
2115 * must be outside lock due to cfg80211,
2116 * but that's not a problem.
2117 */
2118 ieee80211_send_deauth_disassoc(sdata, bssid,
2119 IEEE80211_STYPE_DEAUTH,
2120 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2121 NULL);
2122 mutex_lock(&ifmgd->mtx);
2123 }
2124 }
2125
77fdaa12
JB		 2126 list_for_each_entry(wk, &ifmgd->work_list, list) {
2127 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2128 anybusy = true;
2129 break;
2130 }
f0706e82
JB		 2131 }
2132
77fdaa12
JB		 2133 ieee80211_recalc_idle(local);
2134
2135 if (!anybusy) {
2136 mutex_unlock(&ifmgd->mtx);
2137
2138 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
42935eca
LR		 2139 ieee80211_queue_delayed_work(&local->hw,
2140 &local->scan_work,
2141 round_jiffies_relative(0));
9c6bd790 2142 return;
77fdaa12 2143 }
d6f2da5b 2144
77fdaa12 2145 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2146 if (time_is_after_jiffies(wk->timeout)) {
2147 /*
2148 * This work item isn't supposed to be worked on
2149 * right now, but take care to adjust the timer
2150 * properly.
2151 */
2152 run_again(ifmgd, wk->timeout);
77fdaa12 2153 continue;
ca386f31 2154 }
5cff20e6 2155
77fdaa12
JB		 2156 switch (wk->state) {
2157 default:
2158 WARN_ON(1);
2159 /* fall through */
2160 case IEEE80211_MGD_STATE_IDLE:
2161 /* nothing */
2162 rma = RX_MGMT_NONE;
2163 break;
2164 case IEEE80211_MGD_STATE_PROBE:
2165 rma = ieee80211_direct_probe(sdata, wk);
2166 break;
2167 case IEEE80211_MGD_STATE_AUTH:
2168 rma = ieee80211_authenticate(sdata, wk);
2169 break;
2170 case IEEE80211_MGD_STATE_ASSOC:
2171 rma = ieee80211_associate(sdata, wk);
2172 break;
2173 }
2174
2175 switch (rma) {
2176 case RX_MGMT_NONE:
2177 /* no action required */
2178 break;
2179 case RX_MGMT_CFG80211_AUTH_TO:
2180 case RX_MGMT_CFG80211_ASSOC_TO:
2181 list_del(&wk->list);
2182 list_add(&wk->list, &free_work);
2183 wk->tries = rma; /* small abuse but only local */
2184 break;
2185 default:
2186 WARN(1, "unexpected: %d", rma);
2187 }
2188 }
2189
2190 mutex_unlock(&ifmgd->mtx);
2191
2192 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2193 switch (wk->tries) {
2194 case RX_MGMT_CFG80211_AUTH_TO:
2195 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2196 wk->bss->cbss.bssid);
77fdaa12
JB		 2197 break;
2198 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2199 cfg80211_send_assoc_timeout(sdata->dev,
2200 wk->bss->cbss.bssid);
77fdaa12
JB		 2201 break;
2202 default:
2203 WARN(1, "unexpected: %d", wk->tries);
2204 }
2205
2206 list_del(&wk->list);
2207 kfree(wk);
9c6bd790 2208 }
77fdaa12
JB		 2209
2210 ieee80211_recalc_idle(local);
f0706e82
JB		 2211}
2212
b291ba11
JB		 2213static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2214{
2215 struct ieee80211_sub_if_data *sdata =
2216 (struct ieee80211_sub_if_data *) data;
2217 struct ieee80211_local *local = sdata->local;
2218
2219 if (local->quiescing)
2220 return;
2221
42935eca 2222 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2223}
2224
2225static void ieee80211_sta_conn_mon_timer(unsigned long data)
2226{
2227 struct ieee80211_sub_if_data *sdata =
2228 (struct ieee80211_sub_if_data *) data;
2229 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2230 struct ieee80211_local *local = sdata->local;
2231
2232 if (local->quiescing)
2233 return;
2234
42935eca 2235 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2236}
2237
2238static void ieee80211_sta_monitor_work(struct work_struct *work)
2239{
2240 struct ieee80211_sub_if_data *sdata =
2241 container_of(work, struct ieee80211_sub_if_data,
2242 u.mgd.monitor_work);
2243
2244 ieee80211_mgd_probe_ap(sdata, false);
2245}
2246
9c6bd790
JB		 2247static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2248{
ad935687 2249 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2250 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2251 IEEE80211_STA_CONNECTION_POLL);
ad935687 2252
b291ba11 2253 /* let's probe the connection once */
42935eca 2254 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2255 &sdata->u.mgd.monitor_work);
2256 /* and do all the other regular work too */
42935eca 2257 ieee80211_queue_work(&sdata->local->hw,
46900298 2258 &sdata->u.mgd.work);
ad935687 2259 }
9c6bd790 2260}
f0706e82 2261
5bb644a0
JB		 2262#ifdef CONFIG_PM
2263void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2264{
2265 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2266
2267 /*
2268 * we need to use atomic bitops for the running bits
2269 * only because both timers might fire at the same
2270 * time -- the code here is properly synchronised.
2271 */
2272
2273 cancel_work_sync(&ifmgd->work);
2274 cancel_work_sync(&ifmgd->beacon_loss_work);
2275 if (del_timer_sync(&ifmgd->timer))
2276 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2277
2278 cancel_work_sync(&ifmgd->chswitch_work);
2279 if (del_timer_sync(&ifmgd->chswitch_timer))
2280 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2281
2282 cancel_work_sync(&ifmgd->monitor_work);
2283 /* these will just be re-established on connection */
2284 del_timer_sync(&ifmgd->conn_mon_timer);
2285 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2286}
2287
2288void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2289{
2290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2291
2292 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2293 add_timer(&ifmgd->timer);
2294 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2295 add_timer(&ifmgd->chswitch_timer);
2296}
2297#endif
2298
9c6bd790
JB		 2299/* interface setup */
2300void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2301{
46900298 2302 struct ieee80211_if_managed *ifmgd;
988c0f72 2303
46900298
JB		 2304 ifmgd = &sdata->u.mgd;
2305 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2306 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2307 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2308 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2309 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2310 (unsigned long) sdata);
b291ba11
JB		 2311 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2312 (unsigned long) sdata);
2313 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2314 (unsigned long) sdata);
46900298 2315 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2316 (unsigned long) sdata);
46900298 2317 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2318
77fdaa12
JB		 2319 INIT_LIST_HEAD(&ifmgd->work_list);
2320
46900298 2321 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2322 ifmgd->flags = 0;
176be728 2323 if (sdata->local->hw.queues >= 4)
46900298 2324 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2325
77fdaa12 2326 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2327}
2328
77fdaa12
JB		 2329/* scan finished notification */
2330void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2331{
77fdaa12 2332 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2333
77fdaa12
JB		 2334 /* Restart STA timers */
2335 rcu_read_lock();
2336 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2337 ieee80211_restart_sta_timer(sdata);
2338 rcu_read_unlock();
2339}
60f8b39c 2340
77fdaa12
JB		 2341int ieee80211_max_network_latency(struct notifier_block *nb,
2342 unsigned long data, void *dummy)
2343{
2344 s32 latency_usec = (s32) data;
2345 struct ieee80211_local *local =
2346 container_of(nb, struct ieee80211_local,
2347 network_latency_notifier);
1fa6f4af 2348
77fdaa12
JB		 2349 mutex_lock(&local->iflist_mtx);
2350 ieee80211_recalc_ps(local, latency_usec);
2351 mutex_unlock(&local->iflist_mtx);
dfe67012 2352
77fdaa12 2353 return 0;
9c6bd790
JB		 2354}
2355
77fdaa12
JB		 2356/* config hooks */
2357int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2358 struct cfg80211_auth_request *req)
9c6bd790 2359{
46900298 2360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2361 const u8 *ssid;
2362 struct ieee80211_mgd_work *wk;
2363 u16 auth_alg;
9c6bd790 2364
77fdaa12
JB		 2365 switch (req->auth_type) {
2366 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2367 auth_alg = WLAN_AUTH_OPEN;
2368 break;
2369 case NL80211_AUTHTYPE_SHARED_KEY:
2370 auth_alg = WLAN_AUTH_SHARED_KEY;
2371 break;
2372 case NL80211_AUTHTYPE_FT:
2373 auth_alg = WLAN_AUTH_FT;
2374 break;
2375 case NL80211_AUTHTYPE_NETWORK_EAP:
2376 auth_alg = WLAN_AUTH_LEAP;
2377 break;
2378 default:
2379 return -EOPNOTSUPP;
60f8b39c 2380 }
77fdaa12
JB		 2381
2382 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2383 if (!wk)
9c6bd790 2384 return -ENOMEM;
77fdaa12
JB		 2385
2386 wk->bss = (void *)req->bss;
2387
2388 if (req->ie && req->ie_len) {
2389 memcpy(wk->ie, req->ie, req->ie_len);
2390 wk->ie_len = req->ie_len;
9c6bd790 2391 }
77fdaa12 2392
fffd0934
JB		 2393 if (req->key && req->key_len) {
2394 wk->key_len = req->key_len;
2395 wk->key_idx = req->key_idx;
2396 memcpy(wk->key, req->key, req->key_len);
2397 }
2398
77fdaa12
JB		 2399 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2400 memcpy(wk->ssid, ssid + 2, ssid[1]);
2401 wk->ssid_len = ssid[1];
2402
2403 wk->state = IEEE80211_MGD_STATE_PROBE;
2404 wk->auth_alg = auth_alg;
48531847 2405 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2406
2407 /*
2408 * XXX: if still associated need to tell AP that we're going
2409 * to sleep and then change channel etc.
2410 */
2411 sdata->local->oper_channel = req->bss->channel;
2412 ieee80211_hw_config(sdata->local, 0);
2413
2414 mutex_lock(&ifmgd->mtx);
2415 list_add(&wk->list, &sdata->u.mgd.work_list);
2416 mutex_unlock(&ifmgd->mtx);
2417
42935eca 2418 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2419 return 0;
60f8b39c
JB		 2420}
2421
77fdaa12
JB		 2422int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2423 struct cfg80211_assoc_request *req)
f0706e82 2424{
77fdaa12
JB		 2425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2426 struct ieee80211_mgd_work *wk, *found = NULL;
2427 int i, err;
f0706e82 2428
77fdaa12
JB		 2429 mutex_lock(&ifmgd->mtx);
2430
2431 list_for_each_entry(wk, &ifmgd->work_list, list) {
2432 if (&wk->bss->cbss == req->bss &&
2433 wk->state == IEEE80211_MGD_STATE_IDLE) {
2434 found = wk;
2435 break;
2436 }
2437 }
2438
2439 if (!found) {
2440 err = -ENOLINK;
2441 goto out;
2442 }
2443
2444 list_del(&found->list);
2445
2446 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2447 if (!wk) {
2448 list_add(&found->list, &ifmgd->work_list);
2449 err = -ENOMEM;
2450 goto out;
2451 }
2452
2453 list_add(&wk->list, &ifmgd->work_list);
2454
2455 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2456
2457 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2458 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2459 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2460 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2461 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2462
2463 sdata->local->oper_channel = req->bss->channel;
2464 ieee80211_hw_config(sdata->local, 0);
2465
2466 if (req->ie && req->ie_len) {
2467 memcpy(wk->ie, req->ie, req->ie_len);
2468 wk->ie_len = req->ie_len;
2469 } else
2470 wk->ie_len = 0;
2471
2472 if (req->prev_bssid)
2473 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2474
2475 wk->state = IEEE80211_MGD_STATE_ASSOC;
2476 wk->tries = 0;
48531847 2477 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2478
2479 if (req->use_mfp) {
2480 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2481 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2482 } else {
2483 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2484 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2485 }
2486
2487 if (req->crypto.control_port)
2488 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2489 else
2490 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2491
42935eca 2492 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2493
2494 err = 0;
2495
2496 out:
2497 mutex_unlock(&ifmgd->mtx);
2498 return err;
f0706e82
JB		 2499}
2500
77fdaa12 2501int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2502 struct cfg80211_deauth_request *req,
2503 void *cookie)
f0706e82 2504{
46900298 2505 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2506 struct ieee80211_mgd_work *wk;
2507 const u8 *bssid = NULL;
f0706e82 2508
77fdaa12
JB		 2509 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2510 sdata->dev->name, req->reason_code);
2511
2512 mutex_lock(&ifmgd->mtx);
2513
2514 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2515 bssid = req->bss->bssid;
e21546a2 2516 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 2517 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2518 if (&wk->bss->cbss == req->bss) {
2519 bssid = req->bss->bssid;
2520 list_del(&wk->list);
2521 kfree(wk);
2522 break;
2523 }
2524 }
f0706e82 2525
8d8b261a
JB		 2526 /*
2527 * cfg80211 should catch this ... but it's racy since
2528 * we can receive a deauth frame, process it, hand it
2529 * to cfg80211 while that's in a locked section already
2530 * trying to tell us that the user wants to disconnect.
2531 */
2532 if (!bssid) {
77fdaa12 2533 mutex_unlock(&ifmgd->mtx);
46900298 2534 return -ENOLINK;
77fdaa12
JB		 2535 }
2536
2537 mutex_unlock(&ifmgd->mtx);
2538
2539 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2540 IEEE80211_STYPE_DEAUTH, req->reason_code,
2541 cookie);
f0706e82 2542
f0706e82
JB		 2543 return 0;
2544}
84363e6e 2545
77fdaa12 2546int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2547 struct cfg80211_disassoc_request *req,
2548 void *cookie)
9c6bd790 2549{
77fdaa12 2550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2551
77fdaa12
JB		 2552 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2553 sdata->dev->name, req->reason_code);
10f644a4 2554
77fdaa12 2555 mutex_lock(&ifmgd->mtx);
10f644a4 2556
8d8b261a
JB		 2557 /*
2558 * cfg80211 should catch this ... but it's racy since
2559 * we can receive a disassoc frame, process it, hand it
2560 * to cfg80211 while that's in a locked section already
2561 * trying to tell us that the user wants to disconnect.
2562 */
2563 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2564 mutex_unlock(&ifmgd->mtx);
2565 return -ENOLINK;
2566 }
2567
e21546a2 2568 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2569
2570 mutex_unlock(&ifmgd->mtx);
10f644a4 2571
77fdaa12 2572 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2573 IEEE80211_STYPE_DISASSOC, req->reason_code,
2574 cookie);
10f644a4
JB		 2575 return 0;
2576}
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