projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: push rx status into skb->cb
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82 29
6042a3e3 30#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 31#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32#define IEEE80211_AUTH_MAX_TRIES 3
33#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34#define IEEE80211_ASSOC_MAX_TRIES 3
35#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
a971be22 36#define IEEE80211_PROBE_WAIT (HZ / 5)
15b7b062 37#define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
f0706e82 38#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
f0706e82 39
5bb644a0
JB		 40#define TMR_RUNNING_TIMER 0
41#define TMR_RUNNING_CHANSW 1
42
5484e237
JB		 43/* utils */
44static int ecw2cw(int ecw)
60f8b39c 45{
5484e237 46 return (1 << ecw) - 1;
60f8b39c
JB		 47}
48
c2b13452 49static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 50{
51 u8 *end, *pos;
52
00d3f14c 53 pos = bss->cbss.information_elements;
43ac2ca3
JM		 54 if (pos == NULL)
55 return NULL;
00d3f14c 56 end = pos + bss->cbss.len_information_elements;
43ac2ca3
JM		 57
58 while (pos + 1 < end) {
59 if (pos + 2 + pos[1] > end)
60 break;
61 if (pos[0] == ie)
62 return pos;
63 pos += 2 + pos[1];
64 }
65
66 return NULL;
67}
68
c2b13452 69static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 70 struct ieee80211_supported_band *sband,
881d948c 71 u32 *rates)
9ac19a90
JB		 72{
73 int i, j, count;
74 *rates = 0;
75 count = 0;
76 for (i = 0; i < bss->supp_rates_len; i++) {
77 int rate = (bss->supp_rates[i] & 0x7F) * 5;
78
79 for (j = 0; j < sband->n_bitrates; j++)
80 if (sband->bitrates[j].bitrate == rate) {
81 *rates |= BIT(j);
82 count++;
83 break;
84 }
85 }
86
87 return count;
88}
89
d5522e03
JB		 90/*
91 * ieee80211_enable_ht should be called only after the operating band
92 * has been determined as ht configuration depends on the hw's
93 * HT abilities for a specific band.
94 */
95static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
96 struct ieee80211_ht_info *hti,
97 u16 ap_ht_cap_flags)
98{
99 struct ieee80211_local *local = sdata->local;
100 struct ieee80211_supported_band *sband;
101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03
JB		 102 struct sta_info *sta;
103 u32 changed = 0;
9ed6bcce 104 u16 ht_opmode;
d5522e03
JB		 105 bool enable_ht = true, ht_changed;
106 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
107
108 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
109
d5522e03
JB		 110 /* HT is not supported */
111 if (!sband->ht_cap.ht_supported)
112 enable_ht = false;
113
114 /* check that channel matches the right operating channel */
115 if (local->hw.conf.channel->center_freq !=
116 ieee80211_channel_to_frequency(hti->control_chan))
117 enable_ht = false;
118
119 if (enable_ht) {
120 channel_type = NL80211_CHAN_HT20;
121
122 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
123 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
124 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
125 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 127 if (!(local->hw.conf.channel->flags &
128 IEEE80211_CHAN_NO_HT40PLUS))
129 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 130 break;
131 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 132 if (!(local->hw.conf.channel->flags &
133 IEEE80211_CHAN_NO_HT40MINUS))
134 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 135 break;
136 }
137 }
138 }
139
140 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
141 channel_type != local->hw.conf.channel_type;
142
143 local->oper_channel_type = channel_type;
144
145 if (ht_changed) {
146 /* channel_type change automatically detected */
147 ieee80211_hw_config(local, 0);
148
149 rcu_read_lock();
150
151 sta = sta_info_get(local, ifmgd->bssid);
152 if (sta)
153 rate_control_rate_update(local, sband, sta,
154 IEEE80211_RC_HT_CHANGED);
155
156 rcu_read_unlock();
d5522e03
JB		 157 }
158
159 /* disable HT */
160 if (!enable_ht)
161 return 0;
162
9ed6bcce 163 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 164
165 /* if bss configuration changed store the new one */
413ad50a
JB		 166 if (!sdata->ht_opmode_valid ||
167 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 168 changed |= BSS_CHANGED_HT;
9ed6bcce 169 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 170 sdata->ht_opmode_valid = true;
d5522e03
JB		 171 }
172
173 return changed;
174}
175
9c6bd790
JB		 176/* frame sending functions */
177
46900298 178static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
9ac19a90 179{
46900298 180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 181 struct ieee80211_local *local = sdata->local;
182 struct sk_buff *skb;
183 struct ieee80211_mgmt *mgmt;
65fc73ac 184 u8 *pos, *ies, *ht_ie;
9ac19a90
JB		 185 int i, len, count, rates_len, supp_rates_len;
186 u16 capab;
c2b13452 187 struct ieee80211_bss *bss;
9ac19a90
JB		 188 int wmm = 0;
189 struct ieee80211_supported_band *sband;
881d948c 190 u32 rates = 0;
9ac19a90
JB		 191
192 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
46900298 193 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
65fc73ac 194 ifmgd->ssid_len);
9ac19a90
JB		 195 if (!skb) {
196 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
197 "frame\n", sdata->dev->name);
198 return;
199 }
200 skb_reserve(skb, local->hw.extra_tx_headroom);
201
202 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
203
46900298 204 capab = ifmgd->capab;
9ac19a90
JB		 205
206 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
207 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
208 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
209 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
210 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
211 }
212
46900298 213 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
9ac19a90 214 local->hw.conf.channel->center_freq,
46900298 215 ifmgd->ssid, ifmgd->ssid_len);
9ac19a90 216 if (bss) {
00d3f14c 217 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
9ac19a90
JB		 218 capab |= WLAN_CAPABILITY_PRIVACY;
219 if (bss->wmm_used)
220 wmm = 1;
221
222 /* get all rates supported by the device and the AP as
223 * some APs don't like getting a superset of their rates
224 * in the association request (e.g. D-Link DAP 1353 in
225 * b-only mode) */
226 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
227
00d3f14c 228 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
9ac19a90
JB		 229 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
230 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
231
232 ieee80211_rx_bss_put(local, bss);
233 } else {
234 rates = ~0;
235 rates_len = sband->n_bitrates;
236 }
237
238 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
239 memset(mgmt, 0, 24);
46900298 240 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
9ac19a90 241 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 242 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
9ac19a90 243
46900298 244 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
9ac19a90
JB		 245 skb_put(skb, 10);
246 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
247 IEEE80211_STYPE_REASSOC_REQ);
248 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
249 mgmt->u.reassoc_req.listen_interval =
250 cpu_to_le16(local->hw.conf.listen_interval);
46900298 251 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
9ac19a90
JB		 252 ETH_ALEN);
253 } else {
254 skb_put(skb, 4);
255 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
256 IEEE80211_STYPE_ASSOC_REQ);
257 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 258 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 259 cpu_to_le16(local->hw.conf.listen_interval);
260 }
261
262 /* SSID */
46900298 263 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
9ac19a90 264 *pos++ = WLAN_EID_SSID;
46900298
JB		 265 *pos++ = ifmgd->ssid_len;
266 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
9ac19a90
JB		 267
268 /* add all rates which were marked to be used above */
269 supp_rates_len = rates_len;
270 if (supp_rates_len > 8)
271 supp_rates_len = 8;
272
273 len = sband->n_bitrates;
274 pos = skb_put(skb, supp_rates_len + 2);
275 *pos++ = WLAN_EID_SUPP_RATES;
276 *pos++ = supp_rates_len;
277
278 count = 0;
279 for (i = 0; i < sband->n_bitrates; i++) {
280 if (BIT(i) & rates) {
281 int rate = sband->bitrates[i].bitrate;
282 *pos++ = (u8) (rate / 5);
283 if (++count == 8)
284 break;
285 }
286 }
287
288 if (rates_len > count) {
289 pos = skb_put(skb, rates_len - count + 2);
290 *pos++ = WLAN_EID_EXT_SUPP_RATES;
291 *pos++ = rates_len - count;
292
293 for (i++; i < sband->n_bitrates; i++) {
294 if (BIT(i) & rates) {
295 int rate = sband->bitrates[i].bitrate;
296 *pos++ = (u8) (rate / 5);
297 }
298 }
299 }
300
301 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
302 /* 1. power capabilities */
303 pos = skb_put(skb, 4);
304 *pos++ = WLAN_EID_PWR_CAPABILITY;
305 *pos++ = 2;
306 *pos++ = 0; /* min tx power */
307 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
308
309 /* 2. supported channels */
310 /* TODO: get this in reg domain format */
311 pos = skb_put(skb, 2 * sband->n_channels + 2);
312 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
313 *pos++ = 2 * sband->n_channels;
314 for (i = 0; i < sband->n_channels; i++) {
315 *pos++ = ieee80211_frequency_to_channel(
316 sband->channels[i].center_freq);
317 *pos++ = 1; /* one channel in the subband*/
318 }
319 }
320
46900298
JB		 321 if (ifmgd->extra_ie) {
322 pos = skb_put(skb, ifmgd->extra_ie_len);
323 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
9ac19a90
JB		 324 }
325
46900298 326 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 327 pos = skb_put(skb, 9);
328 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
329 *pos++ = 7; /* len */
330 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
331 *pos++ = 0x50;
332 *pos++ = 0xf2;
333 *pos++ = 2; /* WME */
334 *pos++ = 0; /* WME info */
335 *pos++ = 1; /* WME ver */
336 *pos++ = 0;
337 }
338
339 /* wmm support is a must to HT */
eb46936b
VT		 340 /*
341 * IEEE802.11n does not allow TKIP/WEP as pairwise
342 * ciphers in HT mode. We still associate in non-ht
343 * mode (11a/b/g) if any one of these ciphers is
344 * configured as pairwise.
345 */
46900298 346 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB		 347 sband->ht_cap.ht_supported &&
348 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 349 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
46900298 350 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
d9fe60de
JB		 351 struct ieee80211_ht_info *ht_info =
352 (struct ieee80211_ht_info *)(ht_ie + 2);
353 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 354 __le16 tmp;
355 u32 flags = local->hw.conf.channel->flags;
356
d9fe60de
JB		 357 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
358 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 359 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 360 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 361 cap &= ~IEEE80211_HT_CAP_SGI_40;
362 }
363 break;
d9fe60de 364 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 365 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 366 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 367 cap &= ~IEEE80211_HT_CAP_SGI_40;
368 }
369 break;
370 }
371
372 tmp = cpu_to_le16(cap);
373 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
374 *pos++ = WLAN_EID_HT_CAPABILITY;
375 *pos++ = sizeof(struct ieee80211_ht_cap);
376 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
377 memcpy(pos, &tmp, sizeof(u16));
378 pos += sizeof(u16);
379 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 380 *pos++ = sband->ht_cap.ampdu_factor |
381 (sband->ht_cap.ampdu_density << 2);
382 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 383 }
384
46900298
JB		 385 kfree(ifmgd->assocreq_ies);
386 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
387 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
388 if (ifmgd->assocreq_ies)
389 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
9ac19a90 390
e50db65c 391 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 392}
393
394
ef422bc0
JB		 395static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
396 u16 stype, u16 reason)
9ac19a90
JB		 397{
398 struct ieee80211_local *local = sdata->local;
46900298 399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 400 struct sk_buff *skb;
401 struct ieee80211_mgmt *mgmt;
9aed3cc1 402
65fc73ac 403 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 404 if (!skb) {
ef422bc0
JB		 405 printk(KERN_DEBUG "%s: failed to allocate buffer for "
406 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 407 return;
408 }
409 skb_reserve(skb, local->hw.extra_tx_headroom);
410
411 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
412 memset(mgmt, 0, 24);
46900298 413 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
9ac19a90 414 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 415 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
ef422bc0 416 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 417 skb_put(skb, 2);
ef422bc0 418 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 419 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
420
53b46b84
JM		 421 if (stype == IEEE80211_STYPE_DEAUTH)
422 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len);
423 else
424 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 425 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 426}
427
572e0012
KV		 428void ieee80211_send_pspoll(struct ieee80211_local *local,
429 struct ieee80211_sub_if_data *sdata)
430{
46900298 431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 432 struct ieee80211_pspoll *pspoll;
433 struct sk_buff *skb;
434 u16 fc;
435
436 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
437 if (!skb) {
438 printk(KERN_DEBUG "%s: failed to allocate buffer for "
439 "pspoll frame\n", sdata->dev->name);
440 return;
441 }
442 skb_reserve(skb, local->hw.extra_tx_headroom);
443
444 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
445 memset(pspoll, 0, sizeof(*pspoll));
446 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
447 pspoll->frame_control = cpu_to_le16(fc);
46900298 448 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 449
450 /* aid in PS-Poll has its two MSBs each set to 1 */
451 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
452
46900298 453 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 454 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
455
456 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 457}
458
965bedad
JB		 459void ieee80211_send_nullfunc(struct ieee80211_local *local,
460 struct ieee80211_sub_if_data *sdata,
461 int powersave)
462{
463 struct sk_buff *skb;
464 struct ieee80211_hdr *nullfunc;
465 __le16 fc;
466
467 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
468 return;
469
470 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
471 if (!skb) {
472 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
473 "frame\n", sdata->dev->name);
474 return;
475 }
476 skb_reserve(skb, local->hw.extra_tx_headroom);
477
478 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
479 memset(nullfunc, 0, 24);
480 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
481 IEEE80211_FCTL_TODS);
482 if (powersave)
483 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
484 nullfunc->frame_control = fc;
485 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
486 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
487 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
488
489 ieee80211_tx_skb(sdata, skb, 0);
490}
491
cc32abd4
JB		 492/* spectrum management related things */
493static void ieee80211_chswitch_work(struct work_struct *work)
494{
495 struct ieee80211_sub_if_data *sdata =
496 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
497 struct ieee80211_bss *bss;
498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
499
500 if (!netif_running(sdata->dev))
501 return;
502
503 bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid,
504 sdata->local->hw.conf.channel->center_freq,
505 ifmgd->ssid, ifmgd->ssid_len);
506 if (!bss)
507 goto exit;
508
509 sdata->local->oper_channel = sdata->local->csa_channel;
510 /* XXX: shouldn't really modify cfg80211-owned data! */
511 if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
512 bss->cbss.channel = sdata->local->oper_channel;
513
514 ieee80211_rx_bss_put(sdata->local, bss);
515exit:
516 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
517 ieee80211_wake_queues_by_reason(&sdata->local->hw,
518 IEEE80211_QUEUE_STOP_REASON_CSA);
519}
520
521static void ieee80211_chswitch_timer(unsigned long data)
522{
523 struct ieee80211_sub_if_data *sdata =
524 (struct ieee80211_sub_if_data *) data;
525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
526
5bb644a0
JB		 527 if (sdata->local->quiescing) {
528 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
529 return;
530 }
531
cc32abd4
JB		 532 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
533}
534
535void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
536 struct ieee80211_channel_sw_ie *sw_elem,
537 struct ieee80211_bss *bss)
538{
539 struct ieee80211_channel *new_ch;
540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
541 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
542
543 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED)
544 return;
545
546 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
547 return;
548
549 /* Disregard subsequent beacons if we are already running a timer
550 processing a CSA */
551
552 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
553 return;
554
555 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
556 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
557 return;
558
559 sdata->local->csa_channel = new_ch;
560
561 if (sw_elem->count <= 1) {
562 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
563 } else {
564 ieee80211_stop_queues_by_reason(&sdata->local->hw,
565 IEEE80211_QUEUE_STOP_REASON_CSA);
566 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
567 mod_timer(&ifmgd->chswitch_timer,
568 jiffies +
569 msecs_to_jiffies(sw_elem->count *
570 bss->cbss.beacon_interval));
571 }
572}
573
574static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
575 u16 capab_info, u8 *pwr_constr_elem,
576 u8 pwr_constr_elem_len)
577{
578 struct ieee80211_conf *conf = &sdata->local->hw.conf;
579
580 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
581 return;
582
583 /* Power constraint IE length should be 1 octet */
584 if (pwr_constr_elem_len != 1)
585 return;
586
587 if ((*pwr_constr_elem <= conf->channel->max_power) &&
588 (*pwr_constr_elem != sdata->local->power_constr_level)) {
589 sdata->local->power_constr_level = *pwr_constr_elem;
590 ieee80211_hw_config(sdata->local, 0);
591 }
592}
593
965bedad
JB		 594/* powersave */
595static void ieee80211_enable_ps(struct ieee80211_local *local,
596 struct ieee80211_sub_if_data *sdata)
597{
598 struct ieee80211_conf *conf = &local->hw.conf;
599
d5edaedc
JB		 600 /*
601 * If we are scanning right now then the parameters will
602 * take effect when scan finishes.
603 */
604 if (local->hw_scanning || local->sw_scanning)
605 return;
606
965bedad
JB		 607 if (conf->dynamic_ps_timeout > 0 &&
608 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
609 mod_timer(&local->dynamic_ps_timer, jiffies +
610 msecs_to_jiffies(conf->dynamic_ps_timeout));
611 } else {
612 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
613 ieee80211_send_nullfunc(local, sdata, 1);
614 conf->flags |= IEEE80211_CONF_PS;
615 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
616 }
617}
618
619static void ieee80211_change_ps(struct ieee80211_local *local)
620{
621 struct ieee80211_conf *conf = &local->hw.conf;
622
623 if (local->ps_sdata) {
965bedad
JB		 624 ieee80211_enable_ps(local, local->ps_sdata);
625 } else if (conf->flags & IEEE80211_CONF_PS) {
626 conf->flags &= ~IEEE80211_CONF_PS;
627 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
628 del_timer_sync(&local->dynamic_ps_timer);
629 cancel_work_sync(&local->dynamic_ps_enable_work);
630 }
631}
632
633/* need to hold RTNL or interface lock */
10f644a4 634void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 635{
636 struct ieee80211_sub_if_data *sdata, *found = NULL;
637 int count = 0;
638
639 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
640 local->ps_sdata = NULL;
641 return;
642 }
643
644 list_for_each_entry(sdata, &local->interfaces, list) {
645 if (!netif_running(sdata->dev))
646 continue;
647 if (sdata->vif.type != NL80211_IFTYPE_STATION)
648 continue;
649 found = sdata;
650 count++;
651 }
652
43f78531 653 if (count == 1 && found->u.mgd.powersave &&
4e751843
JB		 654 (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED) &&
655 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
10f644a4
JB		 656 s32 beaconint_us;
657
658 if (latency < 0)
659 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
660
661 beaconint_us = ieee80211_tu_to_usec(
662 found->vif.bss_conf.beacon_int);
663
04fe2037 664 if (beaconint_us > latency) {
10f644a4 665 local->ps_sdata = NULL;
04fe2037
JB		 666 } else {
667 u8 dtimper = found->vif.bss_conf.dtim_period;
668 int maxslp = 1;
669
670 if (dtimper > 1)
671 maxslp = min_t(int, dtimper,
672 latency / beaconint_us);
673
9ccebe61 674 local->hw.conf.max_sleep_period = maxslp;
10f644a4 675 local->ps_sdata = found;
04fe2037 676 }
10f644a4 677 } else {
965bedad 678 local->ps_sdata = NULL;
10f644a4 679 }
965bedad
JB		 680
681 ieee80211_change_ps(local);
682}
683
684void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
685{
686 struct ieee80211_local *local =
687 container_of(work, struct ieee80211_local,
688 dynamic_ps_disable_work);
689
690 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
691 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
692 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
693 }
694
695 ieee80211_wake_queues_by_reason(&local->hw,
696 IEEE80211_QUEUE_STOP_REASON_PS);
697}
698
699void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
700{
701 struct ieee80211_local *local =
702 container_of(work, struct ieee80211_local,
703 dynamic_ps_enable_work);
704 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
705
706 /* can only happen when PS was just disabled anyway */
707 if (!sdata)
708 return;
709
710 if (local->hw.conf.flags & IEEE80211_CONF_PS)
711 return;
712
713 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
714 ieee80211_send_nullfunc(local, sdata, 1);
715
716 local->hw.conf.flags |= IEEE80211_CONF_PS;
717 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
718}
719
720void ieee80211_dynamic_ps_timer(unsigned long data)
721{
722 struct ieee80211_local *local = (void *) data;
723
5bb644a0
JB		 724 if (local->quiescing)
725 return;
726
965bedad
JB		 727 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
728}
729
60f8b39c 730/* MLME */
f698d856 731static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 732 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 733 u8 *wmm_param, size_t wmm_param_len)
734{
f0706e82
JB		 735 struct ieee80211_tx_queue_params params;
736 size_t left;
737 int count;
738 u8 *pos;
739
46900298 740 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 741 return;
742
743 if (!wmm_param)
744 return;
745
f0706e82
JB		 746 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
747 return;
748 count = wmm_param[6] & 0x0f;
46900298 749 if (count == ifmgd->wmm_last_param_set)
f0706e82 750 return;
46900298 751 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 752
753 pos = wmm_param + 8;
754 left = wmm_param_len - 8;
755
756 memset(&params, 0, sizeof(params));
757
f0706e82
JB		 758 local->wmm_acm = 0;
759 for (; left >= 4; left -= 4, pos += 4) {
760 int aci = (pos[0] >> 5) & 0x03;
761 int acm = (pos[0] >> 4) & 0x01;
762 int queue;
763
764 switch (aci) {
0eeb59fe 765 case 1: /* AC_BK */
e100bb64 766 queue = 3;
988c0f72 767 if (acm)
0eeb59fe 768 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 769 break;
0eeb59fe 770 case 2: /* AC_VI */
e100bb64 771 queue = 1;
988c0f72 772 if (acm)
0eeb59fe 773 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 774 break;
0eeb59fe 775 case 3: /* AC_VO */
e100bb64 776 queue = 0;
988c0f72 777 if (acm)
0eeb59fe 778 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 779 break;
0eeb59fe 780 case 0: /* AC_BE */
f0706e82 781 default:
e100bb64 782 queue = 2;
988c0f72 783 if (acm)
0eeb59fe 784 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 785 break;
786 }
787
788 params.aifs = pos[0] & 0x0f;
789 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
790 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 791 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 792#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 793 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 794 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 795 wiphy_name(local->hw.wiphy), queue, aci, acm,
796 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 797#endif
24487981 798 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 799 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 800 "parameters for queue %d\n",
801 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 802 }
803}
804
7a5158ef
JB		 805static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
806 u16 capab, bool erp_valid, u8 erp)
5628221c 807{
bda3933a 808 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 809#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
46900298 810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
ebd74487 811#endif
471b3efd 812 u32 changed = 0;
7a5158ef
JB		 813 bool use_protection;
814 bool use_short_preamble;
815 bool use_short_slot;
816
817 if (erp_valid) {
818 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
819 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
820 } else {
821 use_protection = false;
822 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
823 }
824
825 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 826
471b3efd 827 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 828#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 829 if (net_ratelimit()) {
0c68ae26 830 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 831 sdata->dev->name,
5628221c 832 use_protection ? "enabled" : "disabled",
46900298 833 ifmgd->bssid);
5628221c 834 }
f4ea83dd 835#endif
471b3efd
JB		 836 bss_conf->use_cts_prot = use_protection;
837 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 838 }
7e9ed188 839
d43c7b37 840 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 841#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 842 if (net_ratelimit()) {
843 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 844 " (BSSID=%pM)\n",
471b3efd 845 sdata->dev->name,
d43c7b37 846 use_short_preamble ? "short" : "long",
46900298 847 ifmgd->bssid);
7e9ed188 848 }
f4ea83dd 849#endif
d43c7b37 850 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 851 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 852 }
d9430a32 853
7a5158ef
JB		 854 if (use_short_slot != bss_conf->use_short_slot) {
855#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
856 if (net_ratelimit()) {
391429c1
CL		 857 printk(KERN_DEBUG "%s: switched to %s slot time"
858 " (BSSID=%pM)\n",
7a5158ef
JB		 859 sdata->dev->name,
860 use_short_slot ? "short" : "long",
46900298 861 ifmgd->bssid);
7a5158ef
JB		 862 }
863#endif
864 bss_conf->use_short_slot = use_short_slot;
865 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 866 }
867
868 return changed;
869}
870
46900298 871static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
f5e5bf25
TW		 872{
873 union iwreq_data wrqu;
46900298 874
f5e5bf25 875 memset(&wrqu, 0, sizeof(wrqu));
46900298
JB		 876 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
877 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
f5e5bf25
TW		 878 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
879 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
880}
881
46900298 882static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
f0706e82 883{
46900298 884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
74af0250
LT		 885 char *buf;
886 size_t len;
887 int i;
f0706e82
JB		 888 union iwreq_data wrqu;
889
46900298 890 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
74af0250
LT		 891 return;
892
46900298
JB		 893 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
894 ifmgd->assocresp_ies_len), GFP_KERNEL);
74af0250
LT		 895 if (!buf)
896 return;
897
898 len = sprintf(buf, "ASSOCINFO(");
46900298 899 if (ifmgd->assocreq_ies) {
74af0250 900 len += sprintf(buf + len, "ReqIEs=");
46900298 901 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
74af0250 902 len += sprintf(buf + len, "%02x",
46900298 903 ifmgd->assocreq_ies[i]);
74af0250 904 }
f0706e82 905 }
46900298
JB		 906 if (ifmgd->assocresp_ies) {
907 if (ifmgd->assocreq_ies)
74af0250
LT		 908 len += sprintf(buf + len, " ");
909 len += sprintf(buf + len, "RespIEs=");
46900298 910 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 911 len += sprintf(buf + len, "%02x",
46900298 912 ifmgd->assocresp_ies[i]);
74af0250 913 }
f0706e82 914 }
74af0250
LT		 915 len += sprintf(buf + len, ")");
916
917 if (len > IW_CUSTOM_MAX) {
918 len = sprintf(buf, "ASSOCRESPIE=");
46900298 919 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 920 len += sprintf(buf + len, "%02x",
46900298 921 ifmgd->assocresp_ies[i]);
74af0250
LT		 922 }
923 }
924
ad788b5e
JL		 925 if (len <= IW_CUSTOM_MAX) {
926 memset(&wrqu, 0, sizeof(wrqu));
927 wrqu.data.length = len;
928 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
929 }
74af0250
LT		 930
931 kfree(buf);
f0706e82
JB		 932}
933
934
f698d856 935static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026 936 u32 bss_info_changed)
f0706e82 937{
46900298 938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 939 struct ieee80211_local *local = sdata->local;
38668c05 940 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 941
c2b13452 942 struct ieee80211_bss *bss;
d6f2da5b 943
ae5eb026 944 bss_info_changed |= BSS_CHANGED_ASSOC;
46900298 945 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 946
46900298 947 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
f5e5bf25 948 conf->channel->center_freq,
46900298 949 ifmgd->ssid, ifmgd->ssid_len);
f5e5bf25
TW		 950 if (bss) {
951 /* set timing information */
00d3f14c
JB		 952 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
953 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
bda3933a 954 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 955
57c4d7b4 956 bss_info_changed |= BSS_CHANGED_BEACON_INT;
ae5eb026 957 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
00d3f14c 958 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
9ac19a90 959
04de8381
KV		 960 cfg80211_hold_bss(&bss->cbss);
961
9ac19a90 962 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 963 }
964
46900298
JB		 965 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
966 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
967 ieee80211_sta_send_associnfo(sdata);
9306102e 968
46900298 969 ifmgd->last_probe = jiffies;
9ac19a90 970 ieee80211_led_assoc(local, 1);
9306102e 971
bda3933a 972 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 973 /*
974 * For now just always ask the driver to update the basic rateset
975 * when we have associated, we aren't checking whether it actually
976 * changed or not.
977 */
ae5eb026 978 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 979
980 /* And the BSSID changed - we're associated now */
981 bss_info_changed |= BSS_CHANGED_BSSID;
982
ae5eb026 983 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 984
965bedad 985 /* will be same as sdata */
04fe2037
JB		 986 if (local->ps_sdata) {
987 mutex_lock(&local->iflist_mtx);
988 ieee80211_recalc_ps(local, -1);
989 mutex_unlock(&local->iflist_mtx);
990 }
e0cb686f 991
9ac19a90
JB		 992 netif_tx_start_all_queues(sdata->dev);
993 netif_carrier_on(sdata->dev);
f0706e82 994
46900298 995 ieee80211_sta_send_apinfo(sdata);
f0706e82
JB		 996}
997
46900298 998static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
f0706e82 999{
46900298 1000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1001 struct ieee80211_local *local = sdata->local;
46900298
JB		 1002
1003 ifmgd->direct_probe_tries++;
1004 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1005 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
46900298
JB		 1006 sdata->dev->name, ifmgd->bssid);
1007 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1008 ieee80211_recalc_idle(local);
e61f2340 1009 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
7a947080
VT		 1010
1011 /*
1012 * Most likely AP is not in the range so remove the
1013 * bss information associated to the AP
1014 */
46900298 1015 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1016 sdata->local->hw.conf.channel->center_freq,
46900298 1017 ifmgd->ssid, ifmgd->ssid_len);
11432379
HS		 1018
1019 /*
1020 * We might have a pending scan which had no chance to run yet
1021 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1022 * Hence, queue the STAs work again
1023 */
1024 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1025 return;
1026 }
f0706e82 1027
0c68ae26 1028 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
46900298
JB		 1029 sdata->dev->name, ifmgd->bssid,
1030 ifmgd->direct_probe_tries);
f0706e82 1031
46900298 1032 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 1033
9ac19a90
JB		 1034 /* Direct probe is sent to broadcast address as some APs
1035 * will not answer to direct packet in unassociated state.
1036 */
1037 ieee80211_send_probe_req(sdata, NULL,
70692ad2 1038 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
9ac19a90 1039
46900298 1040 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 1041}
f0706e82 1042
9ac19a90 1043
46900298 1044static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
f0706e82 1045{
46900298 1046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1047 struct ieee80211_local *local = sdata->local;
636a5d36
JM		 1048 u8 *ies;
1049 size_t ies_len;
46900298
JB		 1050
1051 ifmgd->auth_tries++;
1052 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1053 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 1054 " timed out\n",
46900298
JB		 1055 sdata->dev->name, ifmgd->bssid);
1056 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1057 ieee80211_recalc_idle(local);
1965c853 1058 cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid);
46900298 1059 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1060 sdata->local->hw.conf.channel->center_freq,
46900298 1061 ifmgd->ssid, ifmgd->ssid_len);
11432379
HS		 1062
1063 /*
1064 * We might have a pending scan which had no chance to run yet
1065 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1066 * Hence, queue the STAs work again
1067 */
1068 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1069 return;
1070 }
f0706e82 1071
46900298 1072 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26 1073 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
46900298 1074 sdata->dev->name, ifmgd->bssid);
f0706e82 1075
636a5d36
JM		 1076 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1077 ies = ifmgd->sme_auth_ie;
1078 ies_len = ifmgd->sme_auth_ie_len;
1079 } else {
1080 ies = NULL;
1081 ies_len = 0;
1082 }
1083 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len,
46900298
JB		 1084 ifmgd->bssid, 0);
1085 ifmgd->auth_transaction = 2;
9ac19a90 1086
46900298 1087 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 1088}
1089
5925d976
VN		 1090/*
1091 * The disassoc 'reason' argument can be either our own reason
1092 * if self disconnected or a reason code from the AP.
1093 */
aa458d17 1094static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
46900298
JB		 1095 bool deauth, bool self_disconnected,
1096 u16 reason)
aa458d17 1097{
46900298 1098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1099 struct ieee80211_local *local = sdata->local;
04de8381
KV		 1100 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
1101 struct ieee80211_bss *bss;
aa458d17 1102 struct sta_info *sta;
e0cb686f 1103 u32 changed = 0, config_changed = 0;
aa458d17 1104
aa458d17 1105 if (deauth) {
46900298
JB		 1106 ifmgd->direct_probe_tries = 0;
1107 ifmgd->auth_tries = 0;
aa458d17 1108 }
46900298
JB		 1109 ifmgd->assoc_scan_tries = 0;
1110 ifmgd->assoc_tries = 0;
aa458d17 1111
24e64622 1112 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1113 netif_carrier_off(sdata->dev);
1114
1fa6f4af
JB		 1115 rcu_read_lock();
1116 sta = sta_info_get(local, ifmgd->bssid);
1117 if (sta)
1118 ieee80211_sta_tear_down_BA_sessions(sta);
1119 rcu_read_unlock();
aa458d17 1120
04de8381
KV		 1121 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
1122 conf->channel->center_freq,
1123 ifmgd->ssid, ifmgd->ssid_len);
1124
1125 if (bss) {
1126 cfg80211_unhold_bss(&bss->cbss);
1127 ieee80211_rx_bss_put(local, bss);
1128 }
1129
aa458d17
TW		 1130 if (self_disconnected) {
1131 if (deauth)
ef422bc0
JB		 1132 ieee80211_send_deauth_disassoc(sdata,
1133 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 1134 else
ef422bc0
JB		 1135 ieee80211_send_deauth_disassoc(sdata,
1136 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 1137 }
1138
46900298 1139 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
f5e5bf25
TW		 1140 changed |= ieee80211_reset_erp_info(sdata);
1141
f5e5bf25 1142 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1143 changed |= BSS_CHANGED_ASSOC;
1144 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1145
46900298 1146 ieee80211_sta_send_apinfo(sdata);
aa458d17 1147
7a947080 1148 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
46900298
JB		 1149 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
1150 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1151 sdata->local->hw.conf.channel->center_freq,
46900298 1152 ifmgd->ssid, ifmgd->ssid_len);
7a947080 1153 }
aa458d17 1154
aa837e1d
JB		 1155 ieee80211_set_wmm_default(sdata);
1156
5cff20e6
JB		 1157 ieee80211_recalc_idle(local);
1158
4797938c 1159 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1160 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1161
413ad50a
JB		 1162 /* on the next assoc, re-program HT parameters */
1163 sdata->ht_opmode_valid = false;
1164
a8302de9
VT		 1165 local->power_constr_level = 0;
1166
520eb820
KV		 1167 del_timer_sync(&local->dynamic_ps_timer);
1168 cancel_work_sync(&local->dynamic_ps_enable_work);
1169
e0cb686f
KV		 1170 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1171 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1172 config_changed |= IEEE80211_CONF_CHANGE_PS;
1173 }
ae5eb026 1174
e0cb686f 1175 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1176
1177 /* And the BSSID changed -- not very interesting here */
1178 changed |= BSS_CHANGED_BSSID;
ae5eb026 1179 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1180
1181 rcu_read_lock();
1182
46900298 1183 sta = sta_info_get(local, ifmgd->bssid);
8e268e47
TW		 1184 if (!sta) {
1185 rcu_read_unlock();
1186 return;
1187 }
1188
1189 sta_info_unlink(&sta);
1190
1191 rcu_read_unlock();
1192
1193 sta_info_destroy(sta);
aa458d17 1194}
f0706e82 1195
9ac19a90
JB		 1196static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1197{
1198 if (!sdata || !sdata->default_key ||
1199 sdata->default_key->conf.alg != ALG_WEP)
1200 return 0;
1201 return 1;
1202}
1203
46900298 1204static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
f0706e82 1205{
46900298 1206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1207 struct ieee80211_local *local = sdata->local;
c2b13452 1208 struct ieee80211_bss *bss;
5b98b1f7
JB		 1209 int bss_privacy;
1210 int wep_privacy;
1211 int privacy_invoked;
f0706e82 1212
7986cf95 1213 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME))
f0706e82
JB		 1214 return 0;
1215
46900298 1216 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
8318d78a 1217 local->hw.conf.channel->center_freq,
46900298 1218 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 1219 if (!bss)
1220 return 0;
1221
00d3f14c 1222 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1223 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
46900298 1224 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1225
3e122be0 1226 ieee80211_rx_bss_put(local, bss);
f0706e82 1227
5b98b1f7
JB		 1228 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1229 return 0;
1230
1231 return 1;
f0706e82
JB		 1232}
1233
46900298 1234static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
f0706e82 1235{
46900298 1236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1237 struct ieee80211_local *local = sdata->local;
46900298
JB		 1238
1239 ifmgd->assoc_tries++;
1240 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1241 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1242 " timed out\n",
46900298
JB		 1243 sdata->dev->name, ifmgd->bssid);
1244 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1245 ieee80211_recalc_idle(local);
1965c853 1246 cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid);
46900298 1247 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 1248 sdata->local->hw.conf.channel->center_freq,
46900298 1249 ifmgd->ssid, ifmgd->ssid_len);
11432379
HS		 1250 /*
1251 * We might have a pending scan which had no chance to run yet
1252 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1253 * Hence, queue the STAs work again
1254 */
1255 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1256 return;
1257 }
1258
46900298 1259 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26 1260 printk(KERN_DEBUG "%s: associate with AP %pM\n",
46900298
JB		 1261 sdata->dev->name, ifmgd->bssid);
1262 if (ieee80211_privacy_mismatch(sdata)) {
f0706e82 1263 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1264 "mixed-cell disabled - abort association\n", sdata->dev->name);
46900298 1265 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1266 ieee80211_recalc_idle(local);
f0706e82
JB		 1267 return;
1268 }
1269
46900298 1270 ieee80211_send_assoc(sdata);
f0706e82 1271
46900298 1272 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
f0706e82
JB		 1273}
1274
3cf335d5
KV		 1275void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1276 struct ieee80211_hdr *hdr)
1277{
1278 /*
1279 * We can postpone the mgd.timer whenever receiving unicast frames
1280 * from AP because we know that the connection is working both ways
1281 * at that time. But multicast frames (and hence also beacons) must
1282 * be ignored here, because we need to trigger the timer during
1283 * data idle periods for sending the periodical probe request to
1284 * the AP.
1285 */
1286 if (!is_multicast_ether_addr(hdr->addr1))
1287 mod_timer(&sdata->u.mgd.timer,
1288 jiffies + IEEE80211_MONITORING_INTERVAL);
1289}
f0706e82 1290
04de8381
KV		 1291void ieee80211_beacon_loss_work(struct work_struct *work)
1292{
1293 struct ieee80211_sub_if_data *sdata =
1294 container_of(work, struct ieee80211_sub_if_data,
1295 u.mgd.beacon_loss_work);
1296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1297
34bfc411
JB		 1298 /*
1299 * The driver has already reported this event and we have
1300 * already sent a probe request. Maybe the AP died and the
1301 * driver keeps reporting until we disassociate... We have
1302 * to ignore that because otherwise we would continually
1303 * reset the timer and never check whether we received a
1304 * probe response!
1305 */
1306 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1307 return;
1308
a860402d
MB		 1309#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1310 if (net_ratelimit()) {
1311 printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
1312 "- sending probe request\n", sdata->dev->name,
1313 sdata->u.mgd.bssid);
1314 }
1315#endif
04de8381
KV		 1316
1317 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1318
1319 mutex_lock(&sdata->local->iflist_mtx);
1320 ieee80211_recalc_ps(sdata->local, -1);
1321 mutex_unlock(&sdata->local->iflist_mtx);
1322
04de8381
KV		 1323 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1324 ifmgd->ssid_len, NULL, 0);
1325
e0502de6 1326 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
04de8381
KV		 1327}
1328
1329void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1330{
1331 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1332
1333 queue_work(sdata->local->hw.workqueue,
1334 &sdata->u.mgd.beacon_loss_work);
1335}
1336EXPORT_SYMBOL(ieee80211_beacon_loss);
1337
46900298 1338static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
f0706e82 1339{
46900298 1340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1341 struct ieee80211_local *local = sdata->local;
f0706e82 1342 struct sta_info *sta;
4e751843 1343 unsigned long last_rx;
15b7b062 1344 bool disassoc = false;
f0706e82
JB		 1345
1346 /* TODO: start monitoring current AP signal quality and number of
1347 * missed beacons. Scan other channels every now and then and search
1348 * for better APs. */
1349 /* TODO: remove expired BSSes */
1350
46900298 1351 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1352
d0709a65
JB		 1353 rcu_read_lock();
1354
46900298 1355 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 1356 if (!sta) {
0c68ae26 1357 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
46900298 1358 sdata->dev->name, ifmgd->bssid);
15b7b062 1359 disassoc = true;
4e751843
JB		 1360 rcu_read_unlock();
1361 goto out;
15b7b062
KV		 1362 }
1363
4e751843
JB		 1364 last_rx = sta->last_rx;
1365 rcu_read_unlock();
1366
15b7b062 1367 if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
4e751843 1368 time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
15b7b062
KV		 1369 printk(KERN_DEBUG "%s: no probe response from AP %pM "
1370 "- disassociating\n",
1371 sdata->dev->name, ifmgd->bssid);
1372 disassoc = true;
1373 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843 1374 goto out;
15b7b062
KV		 1375 }
1376
04de8381
KV		 1377 /*
1378 * Beacon filtering is only enabled with power save and then the
1379 * stack should not check for beacon loss.
1380 */
1381 if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) &&
1382 (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
1383 time_after(jiffies,
15b7b062 1384 ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
a860402d
MB		 1385#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1386 if (net_ratelimit()) {
1387 printk(KERN_DEBUG "%s: beacon loss from AP %pM "
1388 "- sending probe request\n",
1389 sdata->dev->name, ifmgd->bssid);
1390 }
1391#endif
15b7b062 1392 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1393 mutex_lock(&local->iflist_mtx);
1394 ieee80211_recalc_ps(local, -1);
1395 mutex_unlock(&local->iflist_mtx);
15b7b062
KV		 1396 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1397 ifmgd->ssid_len, NULL, 0);
4ef699fb 1398 mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
4e751843 1399 goto out;
15b7b062
KV		 1400 }
1401
4e751843 1402 if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
15b7b062 1403 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1404 mutex_lock(&local->iflist_mtx);
1405 ieee80211_recalc_ps(local, -1);
1406 mutex_unlock(&local->iflist_mtx);
15b7b062
KV		 1407 ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
1408 ifmgd->ssid_len, NULL, 0);
f0706e82 1409 }
d0709a65 1410
4e751843 1411 out:
4ef699fb
JB		 1412 if (!disassoc)
1413 mod_timer(&ifmgd->timer,
1414 jiffies + IEEE80211_MONITORING_INTERVAL);
4e751843 1415 else
46900298 1416 ieee80211_set_disassoc(sdata, true, true,
60f8b39c 1417 WLAN_REASON_PREV_AUTH_NOT_VALID);
f0706e82
JB		 1418}
1419
1420
46900298 1421static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
f0706e82 1422{
46900298
JB		 1423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1424
f698d856 1425 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
46900298 1426 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
636a5d36
JM		 1427 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1428 /* Wait for SME to request association */
1429 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1430 ieee80211_recalc_idle(sdata->local);
636a5d36
JM		 1431 } else
1432 ieee80211_associate(sdata);
f0706e82
JB		 1433}
1434
1435
f698d856 1436static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1437 struct ieee80211_mgmt *mgmt,
1438 size_t len)
1439{
1440 u8 *pos;
1441 struct ieee802_11_elems elems;
1442
f0706e82 1443 pos = mgmt->u.auth.variable;
67a4cce4 1444 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1445 if (!elems.challenge)
f0706e82 1446 return;
46900298
JB		 1447 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
1448 elems.challenge - 2, elems.challenge_len + 2,
1449 sdata->u.mgd.bssid, 1);
1450 sdata->u.mgd.auth_transaction = 4;
fe3d2c3f
JB		 1451}
1452
f698d856 1453static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1454 struct ieee80211_mgmt *mgmt,
1455 size_t len)
1456{
46900298 1457 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1458 u16 auth_alg, auth_transaction, status_code;
1459
46900298 1460 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
f0706e82 1461 return;
f0706e82 1462
f4ea83dd 1463 if (len < 24 + 6)
f0706e82 1464 return;
f0706e82 1465
46900298 1466 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1467 return;
f0706e82 1468
46900298 1469 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1470 return;
f0706e82
JB		 1471
1472 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1473 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1474 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1475
46900298
JB		 1476 if (auth_alg != ifmgd->auth_alg ||
1477 auth_transaction != ifmgd->auth_transaction)
f0706e82 1478 return;
f0706e82
JB		 1479
1480 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1481 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1482 u8 algs[3];
1483 const int num_algs = ARRAY_SIZE(algs);
1484 int i, pos;
1485 algs[0] = algs[1] = algs[2] = 0xff;
46900298 1486 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
f0706e82 1487 algs[0] = WLAN_AUTH_OPEN;
46900298 1488 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
f0706e82 1489 algs[1] = WLAN_AUTH_SHARED_KEY;
46900298 1490 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
f0706e82 1491 algs[2] = WLAN_AUTH_LEAP;
46900298 1492 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
f0706e82 1493 pos = 0;
46900298 1494 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
f0706e82
JB		 1495 pos = 1;
1496 else
1497 pos = 2;
1498 for (i = 0; i < num_algs; i++) {
1499 pos++;
1500 if (pos >= num_algs)
1501 pos = 0;
46900298 1502 if (algs[pos] == ifmgd->auth_alg ||
f0706e82
JB		 1503 algs[pos] == 0xff)
1504 continue;
1505 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1506 !ieee80211_sta_wep_configured(sdata))
f0706e82 1507 continue;
46900298 1508 ifmgd->auth_alg = algs[pos];
f0706e82
JB		 1509 break;
1510 }
1511 }
1512 return;
1513 }
1514
46900298 1515 switch (ifmgd->auth_alg) {
f0706e82
JB		 1516 case WLAN_AUTH_OPEN:
1517 case WLAN_AUTH_LEAP:
636a5d36 1518 case WLAN_AUTH_FT:
46900298 1519 ieee80211_auth_completed(sdata);
6039f6d2 1520 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1521 break;
1522 case WLAN_AUTH_SHARED_KEY:
6039f6d2 1523 if (ifmgd->auth_transaction == 4) {
46900298 1524 ieee80211_auth_completed(sdata);
6039f6d2
JM		 1525 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len);
1526 } else
46900298 1527 ieee80211_auth_challenge(sdata, mgmt, len);
f0706e82
JB		 1528 break;
1529 }
1530}
1531
1532
f698d856 1533static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1534 struct ieee80211_mgmt *mgmt,
1535 size_t len)
1536{
46900298 1537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1538 u16 reason_code;
1539
f4ea83dd 1540 if (len < 24 + 2)
f0706e82 1541 return;
f0706e82 1542
46900298 1543 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1544 return;
f0706e82
JB		 1545
1546 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1547
46900298 1548 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1549 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1550 sdata->dev->name, reason_code);
f0706e82 1551
636a5d36
JM		 1552 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1553 (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1554 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1555 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) {
46900298
JB		 1556 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1557 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1558 IEEE80211_RETRY_AUTH_INTERVAL);
1559 }
1560
46900298
JB		 1561 ieee80211_set_disassoc(sdata, true, false, 0);
1562 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
53b46b84 1563 cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1564}
1565
1566
f698d856 1567static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1568 struct ieee80211_mgmt *mgmt,
1569 size_t len)
1570{
46900298 1571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1572 u16 reason_code;
1573
f4ea83dd 1574 if (len < 24 + 2)
f0706e82 1575 return;
f0706e82 1576
46900298 1577 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1578 return;
f0706e82
JB		 1579
1580 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1581
46900298 1582 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1583 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1584 sdata->dev->name, reason_code);
f0706e82 1585
636a5d36
JM		 1586 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
1587 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
46900298
JB		 1588 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1589 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1590 IEEE80211_RETRY_AUTH_INTERVAL);
1591 }
1592
46900298 1593 ieee80211_set_disassoc(sdata, false, false, reason_code);
53b46b84 1594 cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1595}
1596
1597
471b3efd 1598static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1599 struct ieee80211_mgmt *mgmt,
1600 size_t len,
1601 int reassoc)
1602{
46900298 1603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1604 struct ieee80211_local *local = sdata->local;
8318d78a 1605 struct ieee80211_supported_band *sband;
f0706e82 1606 struct sta_info *sta;
881d948c 1607 u32 rates, basic_rates;
f0706e82
JB		 1608 u16 capab_info, status_code, aid;
1609 struct ieee802_11_elems elems;
bda3933a 1610 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1611 u8 *pos;
ae5eb026 1612 u32 changed = 0;
f0706e82 1613 int i, j;
ddf4ac53 1614 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1615 u16 ap_ht_cap_flags;
f0706e82
JB		 1616
1617 /* AssocResp and ReassocResp have identical structure, so process both
1618 * of them in this function. */
1619
46900298 1620 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1621 return;
f0706e82 1622
f4ea83dd 1623 if (len < 24 + 6)
f0706e82 1624 return;
f0706e82 1625
46900298 1626 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1627 return;
f0706e82
JB		 1628
1629 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1630 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1631 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1632
0c68ae26 1633 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1634 "status=%d aid=%d)\n",
0c68ae26 1635 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1636 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1637
63a5ab82
JM		 1638 pos = mgmt->u.assoc_resp.variable;
1639 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1640
1641 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1642 elems.timeout_int && elems.timeout_int_len == 5 &&
1643 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1644 u32 tu, ms;
f797eb7e 1645 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1646 ms = tu * 1024 / 1000;
1647 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1648 "comeback duration %u TU (%u ms)\n",
1649 sdata->dev->name, tu, ms);
1650 if (ms > IEEE80211_ASSOC_TIMEOUT)
46900298 1651 mod_timer(&ifmgd->timer,
63a5ab82
JM		 1652 jiffies + msecs_to_jiffies(ms));
1653 return;
1654 }
1655
f0706e82
JB		 1656 if (status_code != WLAN_STATUS_SUCCESS) {
1657 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1658 sdata->dev->name, status_code);
8a69aa93
DD		 1659 /* if this was a reassociation, ensure we try a "full"
1660 * association next time. This works around some broken APs
1661 * which do not correctly reject reassociation requests. */
46900298 1662 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
66174bbe
JM		 1663 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
1664 if (ifmgd->flags & IEEE80211_STA_EXT_SME) {
1665 /* Wait for SME to decide what to do next */
1666 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 1667 ieee80211_recalc_idle(local);
66174bbe 1668 }
f0706e82
JB		 1669 return;
1670 }
1671
1dd84aa2
JB		 1672 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1673 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1674 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1675 aid &= ~(BIT(15) | BIT(14));
1676
f0706e82
JB		 1677 if (!elems.supp_rates) {
1678 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1679 sdata->dev->name);
f0706e82
JB		 1680 return;
1681 }
1682
f698d856 1683 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298
JB		 1684 ifmgd->aid = aid;
1685 ifmgd->ap_capab = capab_info;
f0706e82 1686
46900298
JB		 1687 kfree(ifmgd->assocresp_ies);
1688 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1689 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1690 if (ifmgd->assocresp_ies)
1691 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
f0706e82 1692
d0709a65
JB		 1693 rcu_read_lock();
1694
f0706e82 1695 /* Add STA entry for the AP */
46900298 1696 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 1697 if (!sta) {
ddf4ac53 1698 newsta = true;
d0709a65 1699
46900298 1700 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
73651ee6
JB		 1701 if (!sta) {
1702 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1703 " the AP\n", sdata->dev->name);
d0709a65 1704 rcu_read_unlock();
f0706e82
JB		 1705 return;
1706 }
f709fc69 1707
60f8b39c
JB		 1708 /* update new sta with its last rx activity */
1709 sta->last_rx = jiffies;
f709fc69 1710 }
f709fc69 1711
60f8b39c
JB		 1712 /*
1713 * FIXME: Do we really need to update the sta_info's information here?
1714 * We already know about the AP (we found it in our list) so it
1715 * should already be filled with the right info, no?
1716 * As is stands, all this is racy because typically we assume
1717 * the information that is filled in here (except flags) doesn't
1718 * change while a STA structure is alive. As such, it should move
1719 * to between the sta_info_alloc() and sta_info_insert() above.
1720 */
f709fc69 1721
3f77316c
JM		 1722 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP);
1723 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1724 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
05e5e883 1725
60f8b39c
JB		 1726 rates = 0;
1727 basic_rates = 0;
1728 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1729
60f8b39c
JB		 1730 for (i = 0; i < elems.supp_rates_len; i++) {
1731 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1732 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1733
60f8b39c
JB		 1734 if (rate > 110)
1735 have_higher_than_11mbit = true;
1736
1737 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1738 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1739 rates |= BIT(j);
d61272cb
TW		 1740 if (is_basic)
1741 basic_rates |= BIT(j);
1742 break;
1743 }
f709fc69 1744 }
f709fc69
LCC		 1745 }
1746
60f8b39c
JB		 1747 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1748 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1749 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1750
60f8b39c
JB		 1751 if (rate > 110)
1752 have_higher_than_11mbit = true;
f0706e82 1753
60f8b39c 1754 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1755 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1756 rates |= BIT(j);
d61272cb
TW		 1757 if (is_basic)
1758 basic_rates |= BIT(j);
1759 break;
1760 }
60f8b39c 1761 }
1ebebea8 1762 }
f0706e82 1763
323ce79a 1764 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1765 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1766
1767 /* cf. IEEE 802.11 9.2.12 */
1768 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1769 have_higher_than_11mbit)
1770 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1771 else
1772 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1773
e65c2263
S		 1774 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1775 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026 1776 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1777 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1778
1779 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1780
4b7679a5 1781 rate_control_rate_init(sta);
f0706e82 1782
46900298 1783 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1784 set_sta_flags(sta, WLAN_STA_MFP);
1785
ddf4ac53 1786 if (elems.wmm_param)
60f8b39c 1787 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1788
1789 if (newsta) {
1790 int err = sta_info_insert(sta);
1791 if (err) {
1792 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1793 " the AP (error %d)\n", sdata->dev->name, err);
1794 rcu_read_unlock();
1795 return;
1796 }
1797 }
1798
1799 rcu_read_unlock();
1800
1801 if (elems.wmm_param)
46900298 1802 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1803 elems.wmm_param_len);
aa837e1d
JB		 1804 else
1805 ieee80211_set_wmm_default(sdata);
f0706e82 1806
ae5eb026 1807 if (elems.ht_info_elem && elems.wmm_param &&
46900298
JB		 1808 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1809 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026
JB		 1810 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1811 ap_ht_cap_flags);
1812
60f8b39c
JB		 1813 /* set AID and assoc capability,
1814 * ieee80211_set_associated() will tell the driver */
1815 bss_conf->aid = aid;
1816 bss_conf->assoc_capability = capab_info;
46900298 1817 ieee80211_set_associated(sdata, changed);
f0706e82 1818
15b7b062
KV		 1819 /*
1820 * initialise the time of last beacon to be the association time,
1821 * otherwise beacon loss check will trigger immediately
1822 */
1823 ifmgd->last_beacon = jiffies;
1824
46900298 1825 ieee80211_associated(sdata);
6039f6d2 1826 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len);
f0706e82
JB		 1827}
1828
1829
98c8fccf
JB		 1830static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1831 struct ieee80211_mgmt *mgmt,
1832 size_t len,
1833 struct ieee80211_rx_status *rx_status,
1834 struct ieee802_11_elems *elems,
1835 bool beacon)
1836{
1837 struct ieee80211_local *local = sdata->local;
1838 int freq;
c2b13452 1839 struct ieee80211_bss *bss;
98c8fccf 1840 struct ieee80211_channel *channel;
98c8fccf
JB		 1841
1842 if (elems->ds_params && elems->ds_params_len == 1)
1843 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1844 else
1845 freq = rx_status->freq;
1846
1847 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1848
1849 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1850 return;
1851
98c8fccf 1852 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1853 channel, beacon);
98c8fccf
JB		 1854 if (!bss)
1855 return;
1856
c481ec97 1857 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
46900298 1858 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
c481ec97
S		 1859 struct ieee80211_channel_sw_ie *sw_elem =
1860 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1861 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97
S		 1862 }
1863
3e122be0 1864 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1865}
1866
1867
f698d856 1868static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1869 struct ieee80211_mgmt *mgmt,
1870 size_t len,
1871 struct ieee80211_rx_status *rx_status)
1872{
15b7b062 1873 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1874 size_t baselen;
1875 struct ieee802_11_elems elems;
1876
15b7b062
KV		 1877 ifmgd = &sdata->u.mgd;
1878
8e7cdbb6
TW		 1879 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1880 return; /* ignore ProbeResp to foreign address */
1881
ae6a44e3
EK		 1882 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1883 if (baselen > len)
1884 return;
1885
1886 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1887 &elems);
1888
98c8fccf 1889 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1890
1891 /* direct probe may be part of the association flow */
16cf438a 1892 if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) {
9859b81e
RR		 1893 printk(KERN_DEBUG "%s direct probe responded\n",
1894 sdata->dev->name);
46900298 1895 ieee80211_authenticate(sdata);
9859b81e 1896 }
15b7b062 1897
4e751843 1898 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
15b7b062 1899 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1900 mutex_lock(&sdata->local->iflist_mtx);
1901 ieee80211_recalc_ps(sdata->local, -1);
1902 mutex_unlock(&sdata->local->iflist_mtx);
1903 }
f0706e82
JB		 1904}
1905
d91f36db
JB		 1906/*
1907 * This is the canonical list of information elements we care about,
1908 * the filter code also gives us all changes to the Microsoft OUI
1909 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1910 *
1911 * We implement beacon filtering in software since that means we can
1912 * avoid processing the frame here and in cfg80211, and userspace
1913 * will not be able to tell whether the hardware supports it or not.
1914 *
1915 * XXX: This list needs to be dynamic -- userspace needs to be able to
1916 * add items it requires. It also needs to be able to tell us to
1917 * look out for other vendor IEs.
1918 */
1919static const u64 care_about_ies =
1d4df3a5
JB		 1920 (1ULL << WLAN_EID_COUNTRY) |
1921 (1ULL << WLAN_EID_ERP_INFO) |
1922 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1923 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1924 (1ULL << WLAN_EID_HT_CAPABILITY) |
1925 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1926
f698d856 1927static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1928 struct ieee80211_mgmt *mgmt,
1929 size_t len,
1930 struct ieee80211_rx_status *rx_status)
1931{
d91f36db 1932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1933 size_t baselen;
1934 struct ieee802_11_elems elems;
f698d856 1935 struct ieee80211_local *local = sdata->local;
471b3efd 1936 u32 changed = 0;
d91f36db 1937 bool erp_valid, directed_tim = false;
7a5158ef 1938 u8 erp_value = 0;
d91f36db 1939 u32 ncrc;
f0706e82 1940
ae6a44e3
EK		 1941 /* Process beacon from the current BSS */
1942 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1943 if (baselen > len)
1944 return;
1945
d91f36db 1946 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1947 return;
f0706e82 1948
46900298
JB		 1949 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1950 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1951 return;
1952
92778180
JM		 1953 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1954#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1955 if (net_ratelimit()) {
1956 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1957 "to a received beacon\n", sdata->dev->name);
1958 }
1959#endif
1960 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1961 mutex_lock(&local->iflist_mtx);
1962 ieee80211_recalc_ps(local, -1);
1963 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1964 }
1965
d91f36db
JB		 1966 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1967 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1968 len - baselen, &elems,
1969 care_about_ies, ncrc);
1970
1971 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1972 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1973 ifmgd->aid);
d91f36db 1974
30196673
JM		 1975 if (ncrc != ifmgd->beacon_crc) {
1976 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1977 true);
d91f36db 1978
30196673
JM		 1979 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1980 elems.wmm_param_len);
1981 }
fe3fa827 1982
25c9c875 1983 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1984 if (directed_tim) {
572e0012
KV		 1985 if (local->hw.conf.dynamic_ps_timeout > 0) {
1986 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1987 ieee80211_hw_config(local,
1988 IEEE80211_CONF_CHANGE_PS);
1989 ieee80211_send_nullfunc(local, sdata, 0);
1990 } else {
1991 local->pspolling = true;
1992
1993 /*
1994 * Here is assumed that the driver will be
1995 * able to send ps-poll frame and receive a
1996 * response even though power save mode is
1997 * enabled, but some drivers might require
1998 * to disable power save here. This needs
1999 * to be investigated.
2000 */
2001 ieee80211_send_pspoll(local, sdata);
2002 }
a97b77b9
VN		 2003 }
2004 }
7a5158ef 2005
30196673
JM		 2006 if (ncrc == ifmgd->beacon_crc)
2007 return;
2008 ifmgd->beacon_crc = ncrc;
2009
7a5158ef
JB		 2010 if (elems.erp_info && elems.erp_info_len >= 1) {
2011 erp_valid = true;
2012 erp_value = elems.erp_info[0];
2013 } else {
2014 erp_valid = false;
50c4afb9 2015 }
7a5158ef
JB		 2016 changed |= ieee80211_handle_bss_capability(sdata,
2017 le16_to_cpu(mgmt->u.beacon.capab_info),
2018 erp_valid, erp_value);
f0706e82 2019
d3c990fb 2020
53d6f81c 2021 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
46900298 2022 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
ae5eb026
JB		 2023 struct sta_info *sta;
2024 struct ieee80211_supported_band *sband;
2025 u16 ap_ht_cap_flags;
2026
2027 rcu_read_lock();
2028
46900298 2029 sta = sta_info_get(local, ifmgd->bssid);
ae5eb026
JB		 2030 if (!sta) {
2031 rcu_read_unlock();
2032 return;
2033 }
2034
2035 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2036
2037 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
2038 elems.ht_cap_elem, &sta->sta.ht_cap);
2039
2040 ap_ht_cap_flags = sta->sta.ht_cap.cap;
2041
2042 rcu_read_unlock();
2043
2044 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
2045 ap_ht_cap_flags);
d3c990fb
RR		 2046 }
2047
3f2355cb
LR		 2048 if (elems.country_elem) {
2049 /* Note we are only reviewing this on beacons
2050 * for the BSSID we are associated to */
2051 regulatory_hint_11d(local->hw.wiphy,
2052 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 2053
2054 /* TODO: IBSS also needs this */
2055 if (elems.pwr_constr_elem)
2056 ieee80211_handle_pwr_constr(sdata,
2057 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2058 elems.pwr_constr_elem,
2059 elems.pwr_constr_elem_len);
3f2355cb
LR		 2060 }
2061
471b3efd 2062 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2063}
2064
46900298 2065ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 2066 struct sk_buff *skb)
f0706e82 2067{
f698d856 2068 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2069 struct ieee80211_mgmt *mgmt;
2070 u16 fc;
2071
2072 if (skb->len < 24)
46900298 2073 return RX_DROP_MONITOR;
f0706e82
JB		 2074
2075 mgmt = (struct ieee80211_mgmt *) skb->data;
2076 fc = le16_to_cpu(mgmt->frame_control);
2077
2078 switch (fc & IEEE80211_FCTL_STYPE) {
2079 case IEEE80211_STYPE_PROBE_REQ:
2080 case IEEE80211_STYPE_PROBE_RESP:
2081 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 2082 case IEEE80211_STYPE_AUTH:
2083 case IEEE80211_STYPE_ASSOC_RESP:
2084 case IEEE80211_STYPE_REASSOC_RESP:
2085 case IEEE80211_STYPE_DEAUTH:
2086 case IEEE80211_STYPE_DISASSOC:
46900298
JB		 2087 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
2088 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
2089 return RX_QUEUED;
f0706e82
JB		 2090 }
2091
46900298 2092 return RX_DROP_MONITOR;
f0706e82
JB		 2093}
2094
f698d856 2095static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2096 struct sk_buff *skb)
2097{
2098 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2099 struct ieee80211_mgmt *mgmt;
2100 u16 fc;
2101
f0706e82
JB		 2102 rx_status = (struct ieee80211_rx_status *) skb->cb;
2103 mgmt = (struct ieee80211_mgmt *) skb->data;
2104 fc = le16_to_cpu(mgmt->frame_control);
2105
46900298
JB		 2106 switch (fc & IEEE80211_FCTL_STYPE) {
2107 case IEEE80211_STYPE_PROBE_RESP:
2108 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2109 rx_status);
2110 break;
2111 case IEEE80211_STYPE_BEACON:
2112 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2113 rx_status);
2114 break;
2115 case IEEE80211_STYPE_AUTH:
2116 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2117 break;
2118 case IEEE80211_STYPE_ASSOC_RESP:
2119 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
2120 break;
2121 case IEEE80211_STYPE_REASSOC_RESP:
2122 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
2123 break;
2124 case IEEE80211_STYPE_DEAUTH:
2125 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2126 break;
2127 case IEEE80211_STYPE_DISASSOC:
2128 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2129 break;
f0706e82
JB		 2130 }
2131
2132 kfree_skb(skb);
2133}
2134
9c6bd790 2135static void ieee80211_sta_timer(unsigned long data)
f0706e82 2136{
60f8b39c
JB		 2137 struct ieee80211_sub_if_data *sdata =
2138 (struct ieee80211_sub_if_data *) data;
46900298 2139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2140 struct ieee80211_local *local = sdata->local;
f0706e82 2141
5bb644a0
JB		 2142 if (local->quiescing) {
2143 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2144 return;
2145 }
2146
46900298
JB		 2147 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2148 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 2149}
2150
46900298 2151static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 2152{
46900298 2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 2154 struct ieee80211_local *local = sdata->local;
f0706e82 2155
24487981
JB		 2156 /* Reset own TSF to allow time synchronization work. */
2157 drv_reset_tsf(local);
f0706e82 2158
46900298 2159 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
f0706e82
JB		 2160
2161
46900298
JB		 2162 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2163 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2164 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2165 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
2166 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2167 ifmgd->auth_alg = WLAN_AUTH_LEAP;
636a5d36
JM		 2168 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT)
2169 ifmgd->auth_alg = WLAN_AUTH_FT;
f0706e82 2170 else
46900298
JB		 2171 ifmgd->auth_alg = WLAN_AUTH_OPEN;
2172 ifmgd->auth_transaction = -1;
2173 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
2174 ifmgd->assoc_scan_tries = 0;
2175 ifmgd->direct_probe_tries = 0;
2176 ifmgd->auth_tries = 0;
2177 ifmgd->assoc_tries = 0;
24e64622 2178 netif_tx_stop_all_queues(sdata->dev);
f698d856 2179 netif_carrier_off(sdata->dev);
f0706e82
JB		 2180}
2181
46900298 2182static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 2183{
46900298 2184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 2185 struct ieee80211_local *local = sdata->local;
c2b13452 2186 struct ieee80211_bss *bss;
46900298
JB		 2187 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
2188 u8 ssid_len = ifmgd->ssid_len;
00d3f14c
JB		 2189 u16 capa_mask = WLAN_CAPABILITY_ESS;
2190 u16 capa_val = WLAN_CAPABILITY_ESS;
2191 struct ieee80211_channel *chan = local->oper_channel;
2192
636a5d36
JM		 2193 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) &&
2194 ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
00d3f14c
JB		 2195 IEEE80211_STA_AUTO_BSSID_SEL |
2196 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2197 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2198 if (sdata->default_key)
2199 capa_val |= WLAN_CAPABILITY_PRIVACY;
f0706e82 2200 }
9d139c81 2201
46900298 2202 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
00d3f14c
JB		 2203 chan = NULL;
2204
46900298 2205 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
00d3f14c
JB		 2206 bssid = NULL;
2207
46900298 2208 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
00d3f14c
JB		 2209 ssid = NULL;
2210 ssid_len = 0;
2211 }
2212
2213 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2214 bssid, ssid, ssid_len,
2215 capa_mask, capa_val);
2216
2217 if (bss) {
7e9debe9
JB		 2218 local->oper_channel = bss->cbss.channel;
2219 local->oper_channel_type = NL80211_CHAN_NO_HT;
2220 ieee80211_hw_config(local, 0);
2221
46900298 2222 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
00d3f14c
JB		 2223 ieee80211_sta_set_ssid(sdata, bss->ssid,
2224 bss->ssid_len);
2225 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2226 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2227 bss->supp_rates);
46900298
JB		 2228 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
2229 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
fdfacf0a 2230 else
46900298 2231 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2232
9c6bd790
JB		 2233 /* Send out direct probe if no probe resp was received or
2234 * the one we have is outdated
2235 */
00d3f14c
JB		 2236 if (!bss->last_probe_resp ||
2237 time_after(jiffies, bss->last_probe_resp
9c6bd790 2238 + IEEE80211_SCAN_RESULT_EXPIRE))
46900298 2239 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
9c6bd790 2240 else
46900298 2241 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2242
00d3f14c 2243 ieee80211_rx_bss_put(local, bss);
46900298 2244 ieee80211_sta_reset_auth(sdata);
9c6bd790
JB		 2245 return 0;
2246 } else {
46900298 2247 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
f3b85252 2248
46900298 2249 ifmgd->assoc_scan_tries++;
af88b907 2250
f3b85252
JB		 2251 ieee80211_request_internal_scan(sdata, ifmgd->ssid,
2252 ssid_len);
af88b907 2253
46900298
JB		 2254 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
2255 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
e374055a 2256 } else {
46900298
JB		 2257 ifmgd->assoc_scan_tries = 0;
2258 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
5cff20e6 2259 ieee80211_recalc_idle(local);
e374055a 2260 }
9c6bd790
JB		 2261 }
2262 return -1;
2263}
2264
2265
2266static void ieee80211_sta_work(struct work_struct *work)
2267{
2268 struct ieee80211_sub_if_data *sdata =
46900298 2269 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2270 struct ieee80211_local *local = sdata->local;
46900298 2271 struct ieee80211_if_managed *ifmgd;
9c6bd790
JB		 2272 struct sk_buff *skb;
2273
2274 if (!netif_running(sdata->dev))
2275 return;
2276
c2b13452 2277 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2278 return;
2279
46900298 2280 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2281 return;
5bb644a0
JB		 2282
2283 /*
2284 * Nothing should have been stuffed into the workqueue during
2285 * the suspend->resume cycle. If this WARN is seen then there
2286 * is a bug with either the driver suspend or something in
2287 * mac80211 stuffing into the workqueue which we haven't yet
2288 * cleared during mac80211's suspend cycle.
2289 */
2290 if (WARN_ON(local->suspended))
2291 return;
2292
46900298 2293 ifmgd = &sdata->u.mgd;
f0706e82 2294
46900298 2295 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2296 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2297
46900298
JB		 2298 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2299 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2300 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
2301 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
f3b85252
JB		 2302 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2303 round_jiffies_relative(0));
9c6bd790 2304 return;
f0706e82
JB		 2305 }
2306
46900298
JB		 2307 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
2308 if (ieee80211_sta_config_auth(sdata))
9c6bd790 2309 return;
46900298
JB		 2310 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
2311 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
9c6bd790 2312 return;
d6f2da5b 2313
5cff20e6
JB		 2314 ieee80211_recalc_idle(local);
2315
46900298 2316 switch (ifmgd->state) {
9c6bd790
JB		 2317 case IEEE80211_STA_MLME_DISABLED:
2318 break;
2319 case IEEE80211_STA_MLME_DIRECT_PROBE:
46900298 2320 ieee80211_direct_probe(sdata);
9c6bd790
JB		 2321 break;
2322 case IEEE80211_STA_MLME_AUTHENTICATE:
46900298 2323 ieee80211_authenticate(sdata);
9c6bd790
JB		 2324 break;
2325 case IEEE80211_STA_MLME_ASSOCIATE:
46900298 2326 ieee80211_associate(sdata);
9c6bd790
JB		 2327 break;
2328 case IEEE80211_STA_MLME_ASSOCIATED:
46900298 2329 ieee80211_associated(sdata);
9c6bd790
JB		 2330 break;
2331 default:
2332 WARN_ON(1);
2333 break;
2334 }
2335
46900298 2336 if (ieee80211_privacy_mismatch(sdata)) {
9c6bd790
JB		 2337 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2338 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2339
46900298 2340 ieee80211_set_disassoc(sdata, false, true,
9c6bd790
JB		 2341 WLAN_REASON_UNSPECIFIED);
2342 }
f0706e82
JB		 2343}
2344
9c6bd790
JB		 2345static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2346{
ad935687
KV		 2347 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2348 /*
2349 * Need to update last_beacon to avoid beacon loss
2350 * test to trigger.
2351 */
2352 sdata->u.mgd.last_beacon = jiffies;
2353
2354
9c6bd790 2355 queue_work(sdata->local->hw.workqueue,
46900298 2356 &sdata->u.mgd.work);
ad935687 2357 }
9c6bd790 2358}
f0706e82 2359
5bb644a0
JB		 2360#ifdef CONFIG_PM
2361void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2362{
2363 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2364
2365 /*
2366 * we need to use atomic bitops for the running bits
2367 * only because both timers might fire at the same
2368 * time -- the code here is properly synchronised.
2369 */
2370
2371 cancel_work_sync(&ifmgd->work);
2372 cancel_work_sync(&ifmgd->beacon_loss_work);
2373 if (del_timer_sync(&ifmgd->timer))
2374 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2375
2376 cancel_work_sync(&ifmgd->chswitch_work);
2377 if (del_timer_sync(&ifmgd->chswitch_timer))
2378 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2379}
2380
2381void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2382{
2383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2384
2385 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2386 add_timer(&ifmgd->timer);
2387 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2388 add_timer(&ifmgd->chswitch_timer);
2389}
2390#endif
2391
9c6bd790
JB		 2392/* interface setup */
2393void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2394{
46900298 2395 struct ieee80211_if_managed *ifmgd;
bbbdff9e 2396 u32 hw_flags;
988c0f72 2397
46900298
JB		 2398 ifmgd = &sdata->u.mgd;
2399 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2400 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2401 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2402 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2403 (unsigned long) sdata);
46900298 2404 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2405 (unsigned long) sdata);
46900298 2406 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2407
46900298
JB		 2408 ifmgd->capab = WLAN_CAPABILITY_ESS;
2409 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
9c6bd790 2410 IEEE80211_AUTH_ALG_SHARED_KEY;
46900298 2411 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
9c6bd790
JB		 2412 IEEE80211_STA_AUTO_BSSID_SEL |
2413 IEEE80211_STA_AUTO_CHANNEL_SEL;
176be728 2414 if (sdata->local->hw.queues >= 4)
46900298 2415 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e
JB		 2416
2417 hw_flags = sdata->local->hw.flags;
2418
2419 if (hw_flags & IEEE80211_HW_SUPPORTS_PS) {
2420 ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE;
2421 sdata->local->hw.conf.dynamic_ps_timeout = 500;
2422 }
f0706e82
JB		 2423}
2424
9c6bd790 2425/* configuration hooks */
46900298 2426void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
60f8b39c 2427{
46900298 2428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2429 struct ieee80211_local *local = sdata->local;
60f8b39c 2430
46900298 2431 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2432 return;
60f8b39c 2433
46900298 2434 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
9c6bd790 2435 IEEE80211_STA_AUTO_BSSID_SEL)) &&
46900298 2436 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
9c6bd790 2437 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2438
46900298
JB		 2439 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2440 ieee80211_set_disassoc(sdata, true, true,
9c6bd790 2441 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2442
68f2d026
JM		 2443 if (ifmgd->ssid_len == 0) {
2444 /*
2445 * Only allow association to be started if a valid SSID
2446 * is configured.
2447 */
2448 return;
2449 }
2450
636a5d36
JM		 2451 if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) ||
2452 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
2453 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
2454 else if (ifmgd->flags & IEEE80211_STA_EXT_SME)
2455 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
46900298 2456 queue_work(local->hw.workqueue, &ifmgd->work);
9c6bd790
JB		 2457 }
2458}
60f8b39c 2459
79f6440c
AF		 2460int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
2461{
2462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2463
79f6440c
AF		 2464 if (ifmgd->ssid_len)
2465 ifmgd->flags |= IEEE80211_STA_SSID_SET;
2466 else
2467 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
2468
2469 return 0;
2470}
2471
9c6bd790
JB		 2472int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2473{
46900298 2474 struct ieee80211_if_managed *ifmgd;
60f8b39c 2475
9c6bd790
JB		 2476 if (len > IEEE80211_MAX_SSID_LEN)
2477 return -EINVAL;
2478
46900298 2479 ifmgd = &sdata->u.mgd;
9c6bd790 2480
46900298 2481 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1fa6f4af
JB		 2482 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2483 ieee80211_set_disassoc(sdata, true, true,
2484 WLAN_REASON_DEAUTH_LEAVING);
2485
a299542e
JM		 2486 /*
2487 * Do not use reassociation if SSID is changed (different ESS).
2488 */
2489 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
46900298
JB		 2490 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
2491 memcpy(ifmgd->ssid, ssid, len);
2492 ifmgd->ssid_len = len;
60f8b39c 2493 }
60f8b39c 2494
79f6440c 2495 return ieee80211_sta_commit(sdata);
9c6bd790
JB		 2496}
2497
2498int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2499{
46900298
JB		 2500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2501 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
2502 *len = ifmgd->ssid_len;
9c6bd790
JB		 2503 return 0;
2504}
2505
2506int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2507{
46900298 2508 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2509
1fa6f4af
JB		 2510 if (compare_ether_addr(bssid, ifmgd->bssid) != 0 &&
2511 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
2512 ieee80211_set_disassoc(sdata, true, true,
2513 WLAN_REASON_DEAUTH_LEAVING);
2514
dfe67012 2515 if (is_valid_ether_addr(bssid)) {
46900298
JB		 2516 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
2517 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
dfe67012 2518 } else {
46900298
JB		 2519 memset(ifmgd->bssid, 0, ETH_ALEN);
2520 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
dfe67012
AF		 2521 }
2522
79f6440c 2523 return ieee80211_sta_commit(sdata);
9c6bd790
JB		 2524}
2525
636a5d36
JM		 2526int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
2527 const char *ie, size_t len)
9c6bd790 2528{
46900298 2529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2530
175427ce
JB		 2531 if (len == 0 && ifmgd->extra_ie_len == 0)
2532 return -EALREADY;
2533
2534 if (len == ifmgd->extra_ie_len && ifmgd->extra_ie &&
2535 memcmp(ifmgd->extra_ie, ie, len) == 0)
2536 return -EALREADY;
2537
46900298 2538 kfree(ifmgd->extra_ie);
9c6bd790 2539 if (len == 0) {
46900298
JB		 2540 ifmgd->extra_ie = NULL;
2541 ifmgd->extra_ie_len = 0;
60f8b39c 2542 return 0;
60f8b39c 2543 }
46900298
JB		 2544 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
2545 if (!ifmgd->extra_ie) {
2546 ifmgd->extra_ie_len = 0;
9c6bd790
JB		 2547 return -ENOMEM;
2548 }
46900298
JB		 2549 memcpy(ifmgd->extra_ie, ie, len);
2550 ifmgd->extra_ie_len = len;
9c6bd790 2551 return 0;
60f8b39c
JB		 2552}
2553
f698d856 2554int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2555{
f4ea83dd 2556 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2557 sdata->dev->name, reason);
f0706e82 2558
46900298 2559 ieee80211_set_disassoc(sdata, true, true, reason);
f0706e82
JB		 2560 return 0;
2561}
2562
f698d856 2563int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2564{
46900298 2565 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2566
f4ea83dd 2567 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2568 sdata->dev->name, reason);
f0706e82 2569
46900298
JB		 2570 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
2571 return -ENOLINK;
f0706e82 2572
46900298 2573 ieee80211_set_disassoc(sdata, false, true, reason);
f0706e82
JB		 2574 return 0;
2575}
84363e6e 2576
9c6bd790
JB		 2577/* scan finished notification */
2578void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2579{
2580 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
9c6bd790
JB		 2581
2582 /* Restart STA timers */
2583 rcu_read_lock();
2584 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2585 ieee80211_restart_sta_timer(sdata);
2586 rcu_read_unlock();
2587}
10f644a4
JB		 2588
2589int ieee80211_max_network_latency(struct notifier_block *nb,
2590 unsigned long data, void *dummy)
2591{
2592 s32 latency_usec = (s32) data;
2593 struct ieee80211_local *local =
2594 container_of(nb, struct ieee80211_local,
2595 network_latency_notifier);
2596
2597 mutex_lock(&local->iflist_mtx);
2598 ieee80211_recalc_ps(local, latency_usec);
2599 mutex_unlock(&local->iflist_mtx);
2600
2601 return 0;
2602}
Linux kernel - Deliverables
This page took 0.53964 seconds and 5 git commands to generate.