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b43: Convert usage of b43_radio_maskset()
[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>
f0706e82 20#include <net/mac80211.h>
472dbc45 21#include <asm/unaligned.h>
60f8b39c 22
f0706e82 23#include "ieee80211_i.h"
2c8dccc7
JB		 24#include "rate.h"
25#include "led.h"
f0706e82 26
6042a3e3 27#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 28#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29#define IEEE80211_AUTH_MAX_TRIES 3
30#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31#define IEEE80211_ASSOC_MAX_TRIES 3
32#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33#define IEEE80211_PROBE_INTERVAL (60 * HZ)
34#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
f0706e82 35
5484e237
JB		 36/* utils */
37static int ecw2cw(int ecw)
60f8b39c 38{
5484e237 39 return (1 << ecw) - 1;
60f8b39c
JB		 40}
41
c2b13452 42static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 43{
44 u8 *end, *pos;
45
00d3f14c 46 pos = bss->cbss.information_elements;
43ac2ca3
JM		 47 if (pos == NULL)
48 return NULL;
00d3f14c 49 end = pos + bss->cbss.len_information_elements;
43ac2ca3
JM		 50
51 while (pos + 1 < end) {
52 if (pos + 2 + pos[1] > end)
53 break;
54 if (pos[0] == ie)
55 return pos;
56 pos += 2 + pos[1];
57 }
58
59 return NULL;
60}
61
c2b13452 62static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 63 struct ieee80211_supported_band *sband,
881d948c 64 u32 *rates)
9ac19a90
JB		 65{
66 int i, j, count;
67 *rates = 0;
68 count = 0;
69 for (i = 0; i < bss->supp_rates_len; i++) {
70 int rate = (bss->supp_rates[i] & 0x7F) * 5;
71
72 for (j = 0; j < sband->n_bitrates; j++)
73 if (sband->bitrates[j].bitrate == rate) {
74 *rates |= BIT(j);
75 count++;
76 break;
77 }
78 }
79
80 return count;
81}
82
9c6bd790
JB		 83/* frame sending functions */
84
9aed3cc1
JM		 85static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
86{
87 if (ies)
88 memcpy(skb_put(skb, ies_len), ies, ies_len);
89}
90
46900298 91static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
9ac19a90 92{
46900298 93 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 94 struct ieee80211_local *local = sdata->local;
95 struct sk_buff *skb;
96 struct ieee80211_mgmt *mgmt;
9aed3cc1 97 u8 *pos, *ies, *ht_ie, *e_ies;
9ac19a90
JB		 98 int i, len, count, rates_len, supp_rates_len;
99 u16 capab;
c2b13452 100 struct ieee80211_bss *bss;
9ac19a90
JB		 101 int wmm = 0;
102 struct ieee80211_supported_band *sband;
881d948c 103 u32 rates = 0;
9aed3cc1
JM		 104 size_t e_ies_len;
105
46900298
JB		 106 if (ifmgd->flags & IEEE80211_IBSS_PREV_BSSID_SET) {
107 e_ies = sdata->u.mgd.ie_reassocreq;
108 e_ies_len = sdata->u.mgd.ie_reassocreq_len;
9aed3cc1 109 } else {
46900298
JB		 110 e_ies = sdata->u.mgd.ie_assocreq;
111 e_ies_len = sdata->u.mgd.ie_assocreq_len;
9aed3cc1 112 }
9ac19a90
JB		 113
114 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
46900298
JB		 115 sizeof(*mgmt) + 200 + ifmgd->extra_ie_len +
116 ifmgd->ssid_len + e_ies_len);
9ac19a90
JB		 117 if (!skb) {
118 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
119 "frame\n", sdata->dev->name);
120 return;
121 }
122 skb_reserve(skb, local->hw.extra_tx_headroom);
123
124 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
125
46900298 126 capab = ifmgd->capab;
9ac19a90
JB		 127
128 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
129 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
130 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
131 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
132 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
133 }
134
46900298 135 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
9ac19a90 136 local->hw.conf.channel->center_freq,
46900298 137 ifmgd->ssid, ifmgd->ssid_len);
9ac19a90 138 if (bss) {
00d3f14c 139 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
9ac19a90
JB		 140 capab |= WLAN_CAPABILITY_PRIVACY;
141 if (bss->wmm_used)
142 wmm = 1;
143
144 /* get all rates supported by the device and the AP as
145 * some APs don't like getting a superset of their rates
146 * in the association request (e.g. D-Link DAP 1353 in
147 * b-only mode) */
148 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
149
00d3f14c 150 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
9ac19a90
JB		 151 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
152 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
153
154 ieee80211_rx_bss_put(local, bss);
155 } else {
156 rates = ~0;
157 rates_len = sband->n_bitrates;
158 }
159
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
161 memset(mgmt, 0, 24);
46900298 162 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
9ac19a90 163 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 164 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
9ac19a90 165
46900298 166 if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) {
9ac19a90
JB		 167 skb_put(skb, 10);
168 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
169 IEEE80211_STYPE_REASSOC_REQ);
170 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
171 mgmt->u.reassoc_req.listen_interval =
172 cpu_to_le16(local->hw.conf.listen_interval);
46900298 173 memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid,
9ac19a90
JB		 174 ETH_ALEN);
175 } else {
176 skb_put(skb, 4);
177 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
178 IEEE80211_STYPE_ASSOC_REQ);
179 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 180 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 181 cpu_to_le16(local->hw.conf.listen_interval);
182 }
183
184 /* SSID */
46900298 185 ies = pos = skb_put(skb, 2 + ifmgd->ssid_len);
9ac19a90 186 *pos++ = WLAN_EID_SSID;
46900298
JB		 187 *pos++ = ifmgd->ssid_len;
188 memcpy(pos, ifmgd->ssid, ifmgd->ssid_len);
9ac19a90
JB		 189
190 /* add all rates which were marked to be used above */
191 supp_rates_len = rates_len;
192 if (supp_rates_len > 8)
193 supp_rates_len = 8;
194
195 len = sband->n_bitrates;
196 pos = skb_put(skb, supp_rates_len + 2);
197 *pos++ = WLAN_EID_SUPP_RATES;
198 *pos++ = supp_rates_len;
199
200 count = 0;
201 for (i = 0; i < sband->n_bitrates; i++) {
202 if (BIT(i) & rates) {
203 int rate = sband->bitrates[i].bitrate;
204 *pos++ = (u8) (rate / 5);
205 if (++count == 8)
206 break;
207 }
208 }
209
210 if (rates_len > count) {
211 pos = skb_put(skb, rates_len - count + 2);
212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
213 *pos++ = rates_len - count;
214
215 for (i++; i < sband->n_bitrates; i++) {
216 if (BIT(i) & rates) {
217 int rate = sband->bitrates[i].bitrate;
218 *pos++ = (u8) (rate / 5);
219 }
220 }
221 }
222
223 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
224 /* 1. power capabilities */
225 pos = skb_put(skb, 4);
226 *pos++ = WLAN_EID_PWR_CAPABILITY;
227 *pos++ = 2;
228 *pos++ = 0; /* min tx power */
229 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
230
231 /* 2. supported channels */
232 /* TODO: get this in reg domain format */
233 pos = skb_put(skb, 2 * sband->n_channels + 2);
234 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
235 *pos++ = 2 * sband->n_channels;
236 for (i = 0; i < sband->n_channels; i++) {
237 *pos++ = ieee80211_frequency_to_channel(
238 sband->channels[i].center_freq);
239 *pos++ = 1; /* one channel in the subband*/
240 }
241 }
242
46900298
JB		 243 if (ifmgd->extra_ie) {
244 pos = skb_put(skb, ifmgd->extra_ie_len);
245 memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len);
9ac19a90
JB		 246 }
247
46900298 248 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 249 pos = skb_put(skb, 9);
250 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
251 *pos++ = 7; /* len */
252 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
253 *pos++ = 0x50;
254 *pos++ = 0xf2;
255 *pos++ = 2; /* WME */
256 *pos++ = 0; /* WME info */
257 *pos++ = 1; /* WME ver */
258 *pos++ = 0;
259 }
260
261 /* wmm support is a must to HT */
eb46936b
VT		 262 /*
263 * IEEE802.11n does not allow TKIP/WEP as pairwise
264 * ciphers in HT mode. We still associate in non-ht
265 * mode (11a/b/g) if any one of these ciphers is
266 * configured as pairwise.
267 */
46900298 268 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB		 269 sband->ht_cap.ht_supported &&
270 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 271 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
46900298 272 (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) {
d9fe60de
JB		 273 struct ieee80211_ht_info *ht_info =
274 (struct ieee80211_ht_info *)(ht_ie + 2);
275 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 276 __le16 tmp;
277 u32 flags = local->hw.conf.channel->flags;
278
d9fe60de
JB		 279 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
9ac19a90 281 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
d9fe60de 282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 283 cap &= ~IEEE80211_HT_CAP_SGI_40;
284 }
285 break;
d9fe60de 286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
9ac19a90 287 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
d9fe60de 288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 289 cap &= ~IEEE80211_HT_CAP_SGI_40;
290 }
291 break;
292 }
293
294 tmp = cpu_to_le16(cap);
295 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
296 *pos++ = WLAN_EID_HT_CAPABILITY;
297 *pos++ = sizeof(struct ieee80211_ht_cap);
298 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
299 memcpy(pos, &tmp, sizeof(u16));
300 pos += sizeof(u16);
301 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 302 *pos++ = sband->ht_cap.ampdu_factor |
303 (sband->ht_cap.ampdu_density << 2);
304 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 305 }
306
9aed3cc1
JM		 307 add_extra_ies(skb, e_ies, e_ies_len);
308
46900298
JB		 309 kfree(ifmgd->assocreq_ies);
310 ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies;
311 ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL);
312 if (ifmgd->assocreq_ies)
313 memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len);
9ac19a90 314
e50db65c 315 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 316}
317
318
ef422bc0
JB		 319static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
320 u16 stype, u16 reason)
9ac19a90
JB		 321{
322 struct ieee80211_local *local = sdata->local;
46900298 323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 324 struct sk_buff *skb;
325 struct ieee80211_mgmt *mgmt;
9aed3cc1
JM		 326 u8 *ies;
327 size_t ies_len;
9ac19a90 328
9aed3cc1 329 if (stype == IEEE80211_STYPE_DEAUTH) {
46900298
JB		 330 ies = sdata->u.mgd.ie_deauth;
331 ies_len = sdata->u.mgd.ie_deauth_len;
9aed3cc1 332 } else {
46900298
JB		 333 ies = sdata->u.mgd.ie_disassoc;
334 ies_len = sdata->u.mgd.ie_disassoc_len;
9aed3cc1
JM		 335 }
336
337 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
338 ies_len);
9ac19a90 339 if (!skb) {
ef422bc0
JB		 340 printk(KERN_DEBUG "%s: failed to allocate buffer for "
341 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 342 return;
343 }
344 skb_reserve(skb, local->hw.extra_tx_headroom);
345
346 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
347 memset(mgmt, 0, 24);
46900298 348 memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN);
9ac19a90 349 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
46900298 350 memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN);
ef422bc0 351 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 352 skb_put(skb, 2);
ef422bc0 353 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 354 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
355
9aed3cc1
JM		 356 add_extra_ies(skb, ies, ies_len);
357
46900298 358 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 359}
360
572e0012
KV		 361void ieee80211_send_pspoll(struct ieee80211_local *local,
362 struct ieee80211_sub_if_data *sdata)
363{
46900298 364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 365 struct ieee80211_pspoll *pspoll;
366 struct sk_buff *skb;
367 u16 fc;
368
369 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
370 if (!skb) {
371 printk(KERN_DEBUG "%s: failed to allocate buffer for "
372 "pspoll frame\n", sdata->dev->name);
373 return;
374 }
375 skb_reserve(skb, local->hw.extra_tx_headroom);
376
377 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
378 memset(pspoll, 0, sizeof(*pspoll));
379 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
380 pspoll->frame_control = cpu_to_le16(fc);
46900298 381 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 382
383 /* aid in PS-Poll has its two MSBs each set to 1 */
384 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
385
46900298 386 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 387 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
388
389 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 390}
391
60f8b39c 392/* MLME */
f698d856 393static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 394 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 395 u8 *wmm_param, size_t wmm_param_len)
396{
f0706e82
JB		 397 struct ieee80211_tx_queue_params params;
398 size_t left;
399 int count;
400 u8 *pos;
401
46900298 402 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 403 return;
404
405 if (!wmm_param)
406 return;
407
f0706e82
JB		 408 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
409 return;
410 count = wmm_param[6] & 0x0f;
46900298 411 if (count == ifmgd->wmm_last_param_set)
f0706e82 412 return;
46900298 413 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 414
415 pos = wmm_param + 8;
416 left = wmm_param_len - 8;
417
418 memset(&params, 0, sizeof(params));
419
420 if (!local->ops->conf_tx)
421 return;
422
423 local->wmm_acm = 0;
424 for (; left >= 4; left -= 4, pos += 4) {
425 int aci = (pos[0] >> 5) & 0x03;
426 int acm = (pos[0] >> 4) & 0x01;
427 int queue;
428
429 switch (aci) {
430 case 1:
e100bb64 431 queue = 3;
988c0f72 432 if (acm)
f0706e82 433 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 434 break;
435 case 2:
e100bb64 436 queue = 1;
988c0f72 437 if (acm)
f0706e82 438 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 439 break;
440 case 3:
e100bb64 441 queue = 0;
988c0f72 442 if (acm)
f0706e82 443 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 444 break;
445 case 0:
446 default:
e100bb64 447 queue = 2;
988c0f72 448 if (acm)
f0706e82 449 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 450 break;
451 }
452
453 params.aifs = pos[0] & 0x0f;
454 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
455 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 456 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 457#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 458 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 459 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 460 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 461 params.cw_max, params.txop);
462#endif
f0706e82
JB		 463 /* TODO: handle ACM (block TX, fallback to next lowest allowed
464 * AC for now) */
465 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
466 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 467 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 468 }
469 }
470}
471
1fb3606b 472static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
a97b77b9
VN		 473{
474 u8 mask;
475 u8 index, indexn1, indexn2;
476 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
477
478 aid &= 0x3fff;
479 index = aid / 8;
480 mask = 1 << (aid & 7);
481
a97b77b9
VN		 482 indexn1 = tim->bitmap_ctrl & 0xfe;
483 indexn2 = elems->tim_len + indexn1 - 4;
484
485 if (index < indexn1 || index > indexn2)
486 return false;
487
488 index -= indexn1;
489
490 return !!(tim->virtual_map[index] & mask);
491}
492
7a5158ef
JB		 493static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
494 u16 capab, bool erp_valid, u8 erp)
5628221c 495{
bda3933a 496 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 497#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
46900298 498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
ebd74487 499#endif
471b3efd 500 u32 changed = 0;
7a5158ef
JB		 501 bool use_protection;
502 bool use_short_preamble;
503 bool use_short_slot;
504
505 if (erp_valid) {
506 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
507 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
508 } else {
509 use_protection = false;
510 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
511 }
512
513 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 514
471b3efd 515 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 516#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 517 if (net_ratelimit()) {
0c68ae26 518 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 519 sdata->dev->name,
5628221c 520 use_protection ? "enabled" : "disabled",
46900298 521 ifmgd->bssid);
5628221c 522 }
f4ea83dd 523#endif
471b3efd
JB		 524 bss_conf->use_cts_prot = use_protection;
525 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 526 }
7e9ed188 527
d43c7b37 528 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 529#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 530 if (net_ratelimit()) {
531 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 532 " (BSSID=%pM)\n",
471b3efd 533 sdata->dev->name,
d43c7b37 534 use_short_preamble ? "short" : "long",
46900298 535 ifmgd->bssid);
7e9ed188 536 }
f4ea83dd 537#endif
d43c7b37 538 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 539 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 540 }
d9430a32 541
7a5158ef
JB		 542 if (use_short_slot != bss_conf->use_short_slot) {
543#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
544 if (net_ratelimit()) {
391429c1
CL		 545 printk(KERN_DEBUG "%s: switched to %s slot time"
546 " (BSSID=%pM)\n",
7a5158ef
JB		 547 sdata->dev->name,
548 use_short_slot ? "short" : "long",
46900298 549 ifmgd->bssid);
7a5158ef
JB		 550 }
551#endif
552 bss_conf->use_short_slot = use_short_slot;
553 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 554 }
555
556 return changed;
557}
558
46900298 559static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
f5e5bf25
TW		 560{
561 union iwreq_data wrqu;
46900298 562
f5e5bf25 563 memset(&wrqu, 0, sizeof(wrqu));
46900298
JB		 564 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
565 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
f5e5bf25
TW		 566 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
567 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
568}
569
46900298 570static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
f0706e82 571{
46900298 572 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
74af0250
LT		 573 char *buf;
574 size_t len;
575 int i;
f0706e82
JB		 576 union iwreq_data wrqu;
577
46900298 578 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
74af0250
LT		 579 return;
580
46900298
JB		 581 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
582 ifmgd->assocresp_ies_len), GFP_KERNEL);
74af0250
LT		 583 if (!buf)
584 return;
585
586 len = sprintf(buf, "ASSOCINFO(");
46900298 587 if (ifmgd->assocreq_ies) {
74af0250 588 len += sprintf(buf + len, "ReqIEs=");
46900298 589 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
74af0250 590 len += sprintf(buf + len, "%02x",
46900298 591 ifmgd->assocreq_ies[i]);
74af0250 592 }
f0706e82 593 }
46900298
JB		 594 if (ifmgd->assocresp_ies) {
595 if (ifmgd->assocreq_ies)
74af0250
LT		 596 len += sprintf(buf + len, " ");
597 len += sprintf(buf + len, "RespIEs=");
46900298 598 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 599 len += sprintf(buf + len, "%02x",
46900298 600 ifmgd->assocresp_ies[i]);
74af0250 601 }
f0706e82 602 }
74af0250
LT		 603 len += sprintf(buf + len, ")");
604
605 if (len > IW_CUSTOM_MAX) {
606 len = sprintf(buf, "ASSOCRESPIE=");
46900298 607 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 608 len += sprintf(buf + len, "%02x",
46900298 609 ifmgd->assocresp_ies[i]);
74af0250
LT		 610 }
611 }
612
ad788b5e
JL		 613 if (len <= IW_CUSTOM_MAX) {
614 memset(&wrqu, 0, sizeof(wrqu));
615 wrqu.data.length = len;
616 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
617 }
74af0250
LT		 618
619 kfree(buf);
f0706e82
JB		 620}
621
622
f698d856 623static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026 624 u32 bss_info_changed)
f0706e82 625{
46900298 626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 627 struct ieee80211_local *local = sdata->local;
38668c05 628 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 629
c2b13452 630 struct ieee80211_bss *bss;
d6f2da5b 631
ae5eb026 632 bss_info_changed |= BSS_CHANGED_ASSOC;
46900298 633 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 634
46900298 635 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
f5e5bf25 636 conf->channel->center_freq,
46900298 637 ifmgd->ssid, ifmgd->ssid_len);
f5e5bf25
TW		 638 if (bss) {
639 /* set timing information */
00d3f14c
JB		 640 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
641 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
bda3933a 642 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 643
ae5eb026 644 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
00d3f14c 645 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 646
647 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 648 }
649
46900298
JB		 650 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
651 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
652 ieee80211_sta_send_associnfo(sdata);
9306102e 653
46900298 654 ifmgd->last_probe = jiffies;
9ac19a90 655 ieee80211_led_assoc(local, 1);
9306102e 656
bda3933a 657 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 658 /*
659 * For now just always ask the driver to update the basic rateset
660 * when we have associated, we aren't checking whether it actually
661 * changed or not.
662 */
ae5eb026
JB		 663 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
664 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 665
4be8c387
JB		 666 if (local->powersave) {
667 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
668 local->hw.conf.dynamic_ps_timeout > 0) {
520eb820 669 mod_timer(&local->dynamic_ps_timer, jiffies +
46f2c4bd
JB		 670 msecs_to_jiffies(
671 local->hw.conf.dynamic_ps_timeout));
4be8c387
JB		 672 } else {
673 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
674 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 675 conf->flags |= IEEE80211_CONF_PS;
4be8c387 676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
520eb820 677 }
e0cb686f
KV		 678 }
679
9ac19a90
JB		 680 netif_tx_start_all_queues(sdata->dev);
681 netif_carrier_on(sdata->dev);
f0706e82 682
46900298 683 ieee80211_sta_send_apinfo(sdata);
f0706e82
JB		 684}
685
46900298 686static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
f0706e82 687{
46900298
JB		 688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
689
690 ifmgd->direct_probe_tries++;
691 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 692 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
46900298
JB		 693 sdata->dev->name, ifmgd->bssid);
694 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
695 ieee80211_sta_send_apinfo(sdata);
7a947080
VT		 696
697 /*
698 * Most likely AP is not in the range so remove the
699 * bss information associated to the AP
700 */
46900298 701 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 702 sdata->local->hw.conf.channel->center_freq,
46900298 703 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 704 return;
705 }
f0706e82 706
0c68ae26 707 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
46900298
JB		 708 sdata->dev->name, ifmgd->bssid,
709 ifmgd->direct_probe_tries);
f0706e82 710
46900298 711 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 712
46900298 713 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
9ac19a90
JB		 714
715 /* Direct probe is sent to broadcast address as some APs
716 * will not answer to direct packet in unassociated state.
717 */
718 ieee80211_send_probe_req(sdata, NULL,
70692ad2 719 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
9ac19a90 720
46900298 721 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 722}
f0706e82 723
9ac19a90 724
46900298 725static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
f0706e82 726{
46900298
JB		 727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
728
729 ifmgd->auth_tries++;
730 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 731 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 732 " timed out\n",
46900298
JB		 733 sdata->dev->name, ifmgd->bssid);
734 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
735 ieee80211_sta_send_apinfo(sdata);
736 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 737 sdata->local->hw.conf.channel->center_freq,
46900298 738 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 739 return;
740 }
f0706e82 741
46900298 742 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26 743 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
46900298 744 sdata->dev->name, ifmgd->bssid);
f0706e82 745
46900298
JB		 746 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0,
747 ifmgd->bssid, 0);
748 ifmgd->auth_transaction = 2;
9ac19a90 749
46900298 750 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 751}
752
5925d976
VN		 753/*
754 * The disassoc 'reason' argument can be either our own reason
755 * if self disconnected or a reason code from the AP.
756 */
aa458d17 757static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
46900298
JB		 758 bool deauth, bool self_disconnected,
759 u16 reason)
aa458d17 760{
46900298 761 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 762 struct ieee80211_local *local = sdata->local;
763 struct sta_info *sta;
e0cb686f 764 u32 changed = 0, config_changed = 0;
aa458d17
TW		 765
766 rcu_read_lock();
767
46900298 768 sta = sta_info_get(local, ifmgd->bssid);
aa458d17
TW		 769 if (!sta) {
770 rcu_read_unlock();
771 return;
772 }
773
774 if (deauth) {
46900298
JB		 775 ifmgd->direct_probe_tries = 0;
776 ifmgd->auth_tries = 0;
aa458d17 777 }
46900298
JB		 778 ifmgd->assoc_scan_tries = 0;
779 ifmgd->assoc_tries = 0;
aa458d17 780
24e64622 781 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 782 netif_carrier_off(sdata->dev);
783
2dace10e 784 ieee80211_sta_tear_down_BA_sessions(sta);
aa458d17
TW		 785
786 if (self_disconnected) {
787 if (deauth)
ef422bc0
JB		 788 ieee80211_send_deauth_disassoc(sdata,
789 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 790 else
ef422bc0
JB		 791 ieee80211_send_deauth_disassoc(sdata,
792 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 793 }
794
46900298 795 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
f5e5bf25
TW		 796 changed |= ieee80211_reset_erp_info(sdata);
797
f5e5bf25 798 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 799 changed |= BSS_CHANGED_ASSOC;
800 sdata->vif.bss_conf.assoc = false;
f5e5bf25 801
46900298 802 ieee80211_sta_send_apinfo(sdata);
aa458d17 803
7a947080 804 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
46900298
JB		 805 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
806 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 807 sdata->local->hw.conf.channel->center_freq,
46900298 808 ifmgd->ssid, ifmgd->ssid_len);
7a947080 809 }
aa458d17 810
aa458d17
TW		 811 rcu_read_unlock();
812
4797938c 813 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 814 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 815
a8302de9
VT		 816 local->power_constr_level = 0;
817
520eb820
KV		 818 del_timer_sync(&local->dynamic_ps_timer);
819 cancel_work_sync(&local->dynamic_ps_enable_work);
820
e0cb686f
KV		 821 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
822 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
823 config_changed |= IEEE80211_CONF_CHANGE_PS;
824 }
ae5eb026 825
e0cb686f 826 ieee80211_hw_config(local, config_changed);
ae5eb026 827 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 828
829 rcu_read_lock();
830
46900298 831 sta = sta_info_get(local, ifmgd->bssid);
8e268e47
TW		 832 if (!sta) {
833 rcu_read_unlock();
834 return;
835 }
836
837 sta_info_unlink(&sta);
838
839 rcu_read_unlock();
840
841 sta_info_destroy(sta);
aa458d17 842}
f0706e82 843
9ac19a90
JB		 844static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
845{
846 if (!sdata || !sdata->default_key ||
847 sdata->default_key->conf.alg != ALG_WEP)
848 return 0;
849 return 1;
850}
851
46900298 852static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
f0706e82 853{
46900298 854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 855 struct ieee80211_local *local = sdata->local;
c2b13452 856 struct ieee80211_bss *bss;
5b98b1f7
JB		 857 int bss_privacy;
858 int wep_privacy;
859 int privacy_invoked;
f0706e82 860
46900298 861 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 862 return 0;
863
46900298 864 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
8318d78a 865 local->hw.conf.channel->center_freq,
46900298 866 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 867 if (!bss)
868 return 0;
869
00d3f14c 870 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
f698d856 871 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
46900298 872 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 873
3e122be0 874 ieee80211_rx_bss_put(local, bss);
f0706e82 875
5b98b1f7
JB		 876 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
877 return 0;
878
879 return 1;
f0706e82
JB		 880}
881
46900298 882static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
f0706e82 883{
46900298
JB		 884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
885
886 ifmgd->assoc_tries++;
887 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 888 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 889 " timed out\n",
46900298
JB		 890 sdata->dev->name, ifmgd->bssid);
891 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
892 ieee80211_sta_send_apinfo(sdata);
893 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 894 sdata->local->hw.conf.channel->center_freq,
46900298 895 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 896 return;
897 }
898
46900298 899 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26 900 printk(KERN_DEBUG "%s: associate with AP %pM\n",
46900298
JB		 901 sdata->dev->name, ifmgd->bssid);
902 if (ieee80211_privacy_mismatch(sdata)) {
f0706e82 903 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 904 "mixed-cell disabled - abort association\n", sdata->dev->name);
46900298 905 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 906 return;
907 }
908
46900298 909 ieee80211_send_assoc(sdata);
f0706e82 910
46900298 911 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
f0706e82
JB		 912}
913
914
46900298 915static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
f0706e82 916{
46900298 917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 918 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 919 struct sta_info *sta;
920 int disassoc;
921
922 /* TODO: start monitoring current AP signal quality and number of
923 * missed beacons. Scan other channels every now and then and search
924 * for better APs. */
925 /* TODO: remove expired BSSes */
926
46900298 927 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 928
d0709a65
JB		 929 rcu_read_lock();
930
46900298 931 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 932 if (!sta) {
0c68ae26 933 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
46900298 934 sdata->dev->name, ifmgd->bssid);
f0706e82
JB		 935 disassoc = 1;
936 } else {
937 disassoc = 0;
938 if (time_after(jiffies,
939 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
46900298 940 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 941 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 942 "current AP %pM - assume out of "
f0706e82 943 "range\n",
46900298 944 sdata->dev->name, ifmgd->bssid);
f0706e82 945 disassoc = 1;
d6f2da5b 946 } else
46900298
JB		 947 ieee80211_send_probe_req(sdata, ifmgd->bssid,
948 ifmgd->ssid,
70692ad2
JM		 949 ifmgd->ssid_len,
950 NULL, 0);
46900298 951 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 952 } else {
46900298
JB		 953 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
954 if (time_after(jiffies, ifmgd->last_probe +
f0706e82 955 IEEE80211_PROBE_INTERVAL)) {
46900298
JB		 956 ifmgd->last_probe = jiffies;
957 ieee80211_send_probe_req(sdata, ifmgd->bssid,
958 ifmgd->ssid,
70692ad2
JM		 959 ifmgd->ssid_len,
960 NULL, 0);
f0706e82
JB		 961 }
962 }
f0706e82 963 }
d0709a65
JB		 964
965 rcu_read_unlock();
966
7a947080 967 if (disassoc)
46900298 968 ieee80211_set_disassoc(sdata, true, true,
60f8b39c 969 WLAN_REASON_PREV_AUTH_NOT_VALID);
7a947080 970 else
46900298 971 mod_timer(&ifmgd->timer, jiffies +
60f8b39c 972 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 973}
974
975
46900298 976static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
f0706e82 977{
46900298
JB		 978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
979
f698d856 980 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
46900298
JB		 981 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
982 ieee80211_associate(sdata);
f0706e82
JB		 983}
984
985
f698d856 986static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 987 struct ieee80211_mgmt *mgmt,
988 size_t len)
989{
990 u8 *pos;
991 struct ieee802_11_elems elems;
992
f0706e82 993 pos = mgmt->u.auth.variable;
67a4cce4 994 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 995 if (!elems.challenge)
f0706e82 996 return;
46900298
JB		 997 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
998 elems.challenge - 2, elems.challenge_len + 2,
999 sdata->u.mgd.bssid, 1);
1000 sdata->u.mgd.auth_transaction = 4;
fe3d2c3f
JB		 1001}
1002
f698d856 1003static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1004 struct ieee80211_mgmt *mgmt,
1005 size_t len)
1006{
46900298 1007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1008 u16 auth_alg, auth_transaction, status_code;
1009
46900298 1010 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
f0706e82 1011 return;
f0706e82 1012
f4ea83dd 1013 if (len < 24 + 6)
f0706e82 1014 return;
f0706e82 1015
46900298 1016 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1017 return;
f0706e82 1018
46900298 1019 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1020 return;
f0706e82
JB		 1021
1022 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1023 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1024 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1025
46900298
JB		 1026 if (auth_alg != ifmgd->auth_alg ||
1027 auth_transaction != ifmgd->auth_transaction)
f0706e82 1028 return;
f0706e82
JB		 1029
1030 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1031 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1032 u8 algs[3];
1033 const int num_algs = ARRAY_SIZE(algs);
1034 int i, pos;
1035 algs[0] = algs[1] = algs[2] = 0xff;
46900298 1036 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
f0706e82 1037 algs[0] = WLAN_AUTH_OPEN;
46900298 1038 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
f0706e82 1039 algs[1] = WLAN_AUTH_SHARED_KEY;
46900298 1040 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
f0706e82 1041 algs[2] = WLAN_AUTH_LEAP;
46900298 1042 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
f0706e82 1043 pos = 0;
46900298 1044 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
f0706e82
JB		 1045 pos = 1;
1046 else
1047 pos = 2;
1048 for (i = 0; i < num_algs; i++) {
1049 pos++;
1050 if (pos >= num_algs)
1051 pos = 0;
46900298 1052 if (algs[pos] == ifmgd->auth_alg ||
f0706e82
JB		 1053 algs[pos] == 0xff)
1054 continue;
1055 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1056 !ieee80211_sta_wep_configured(sdata))
f0706e82 1057 continue;
46900298 1058 ifmgd->auth_alg = algs[pos];
f0706e82
JB		 1059 break;
1060 }
1061 }
1062 return;
1063 }
1064
46900298 1065 switch (ifmgd->auth_alg) {
f0706e82
JB		 1066 case WLAN_AUTH_OPEN:
1067 case WLAN_AUTH_LEAP:
46900298 1068 ieee80211_auth_completed(sdata);
f0706e82
JB		 1069 break;
1070 case WLAN_AUTH_SHARED_KEY:
46900298
JB		 1071 if (ifmgd->auth_transaction == 4)
1072 ieee80211_auth_completed(sdata);
f0706e82 1073 else
46900298 1074 ieee80211_auth_challenge(sdata, mgmt, len);
f0706e82
JB		 1075 break;
1076 }
1077}
1078
1079
f698d856 1080static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1081 struct ieee80211_mgmt *mgmt,
1082 size_t len)
1083{
46900298 1084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1085 u16 reason_code;
1086
f4ea83dd 1087 if (len < 24 + 2)
f0706e82 1088 return;
f0706e82 1089
46900298 1090 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1091 return;
f0706e82
JB		 1092
1093 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1094
46900298 1095 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1096 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1097 sdata->dev->name, reason_code);
f0706e82 1098
46900298
JB		 1099 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1100 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1101 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1102 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1103 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1104 IEEE80211_RETRY_AUTH_INTERVAL);
1105 }
1106
46900298
JB		 1107 ieee80211_set_disassoc(sdata, true, false, 0);
1108 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1109}
1110
1111
f698d856 1112static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1113 struct ieee80211_mgmt *mgmt,
1114 size_t len)
1115{
46900298 1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1117 u16 reason_code;
1118
f4ea83dd 1119 if (len < 24 + 2)
f0706e82 1120 return;
f0706e82 1121
46900298 1122 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1123 return;
f0706e82
JB		 1124
1125 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1126
46900298 1127 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1128 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1129 sdata->dev->name, reason_code);
f0706e82 1130
46900298
JB		 1131 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1132 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1133 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1134 IEEE80211_RETRY_AUTH_INTERVAL);
1135 }
1136
46900298 1137 ieee80211_set_disassoc(sdata, false, false, reason_code);
f0706e82
JB		 1138}
1139
1140
471b3efd 1141static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1142 struct ieee80211_mgmt *mgmt,
1143 size_t len,
1144 int reassoc)
1145{
46900298 1146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1147 struct ieee80211_local *local = sdata->local;
8318d78a 1148 struct ieee80211_supported_band *sband;
f0706e82 1149 struct sta_info *sta;
881d948c 1150 u32 rates, basic_rates;
f0706e82
JB		 1151 u16 capab_info, status_code, aid;
1152 struct ieee802_11_elems elems;
bda3933a 1153 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1154 u8 *pos;
ae5eb026 1155 u32 changed = 0;
f0706e82 1156 int i, j;
ddf4ac53 1157 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1158 u16 ap_ht_cap_flags;
f0706e82
JB		 1159
1160 /* AssocResp and ReassocResp have identical structure, so process both
1161 * of them in this function. */
1162
46900298 1163 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1164 return;
f0706e82 1165
f4ea83dd 1166 if (len < 24 + 6)
f0706e82 1167 return;
f0706e82 1168
46900298 1169 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1170 return;
f0706e82
JB		 1171
1172 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1173 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1174 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1175
0c68ae26 1176 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1177 "status=%d aid=%d)\n",
0c68ae26 1178 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1179 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1180
63a5ab82
JM		 1181 pos = mgmt->u.assoc_resp.variable;
1182 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1183
1184 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1185 elems.timeout_int && elems.timeout_int_len == 5 &&
1186 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1187 u32 tu, ms;
f797eb7e 1188 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1189 ms = tu * 1024 / 1000;
1190 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1191 "comeback duration %u TU (%u ms)\n",
1192 sdata->dev->name, tu, ms);
1193 if (ms > IEEE80211_ASSOC_TIMEOUT)
46900298 1194 mod_timer(&ifmgd->timer,
63a5ab82
JM		 1195 jiffies + msecs_to_jiffies(ms));
1196 return;
1197 }
1198
f0706e82
JB		 1199 if (status_code != WLAN_STATUS_SUCCESS) {
1200 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1201 sdata->dev->name, status_code);
8a69aa93
DD		 1202 /* if this was a reassociation, ensure we try a "full"
1203 * association next time. This works around some broken APs
1204 * which do not correctly reject reassociation requests. */
46900298 1205 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1206 return;
1207 }
1208
1dd84aa2
JB		 1209 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1210 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1211 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1212 aid &= ~(BIT(15) | BIT(14));
1213
f0706e82
JB		 1214 if (!elems.supp_rates) {
1215 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1216 sdata->dev->name);
f0706e82
JB		 1217 return;
1218 }
1219
f698d856 1220 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298
JB		 1221 ifmgd->aid = aid;
1222 ifmgd->ap_capab = capab_info;
f0706e82 1223
46900298
JB		 1224 kfree(ifmgd->assocresp_ies);
1225 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1226 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1227 if (ifmgd->assocresp_ies)
1228 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
f0706e82 1229
d0709a65
JB		 1230 rcu_read_lock();
1231
f0706e82 1232 /* Add STA entry for the AP */
46900298 1233 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 1234 if (!sta) {
ddf4ac53 1235 newsta = true;
d0709a65 1236
46900298 1237 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
73651ee6
JB		 1238 if (!sta) {
1239 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1240 " the AP\n", sdata->dev->name);
d0709a65 1241 rcu_read_unlock();
f0706e82
JB		 1242 return;
1243 }
f709fc69 1244
60f8b39c
JB		 1245 /* update new sta with its last rx activity */
1246 sta->last_rx = jiffies;
f709fc69 1247 }
f709fc69 1248
60f8b39c
JB		 1249 /*
1250 * FIXME: Do we really need to update the sta_info's information here?
1251 * We already know about the AP (we found it in our list) so it
1252 * should already be filled with the right info, no?
1253 * As is stands, all this is racy because typically we assume
1254 * the information that is filled in here (except flags) doesn't
1255 * change while a STA structure is alive. As such, it should move
1256 * to between the sta_info_alloc() and sta_info_insert() above.
1257 */
f709fc69 1258
60f8b39c
JB		 1259 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1260 WLAN_STA_AUTHORIZED);
05e5e883 1261
60f8b39c
JB		 1262 rates = 0;
1263 basic_rates = 0;
1264 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1265
60f8b39c
JB		 1266 for (i = 0; i < elems.supp_rates_len; i++) {
1267 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1268 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1269
60f8b39c
JB		 1270 if (rate > 110)
1271 have_higher_than_11mbit = true;
1272
1273 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1274 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1275 rates |= BIT(j);
d61272cb
TW		 1276 if (is_basic)
1277 basic_rates |= BIT(j);
1278 break;
1279 }
f709fc69 1280 }
f709fc69
LCC		 1281 }
1282
60f8b39c
JB		 1283 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1284 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1285 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1286
60f8b39c
JB		 1287 if (rate > 110)
1288 have_higher_than_11mbit = true;
f0706e82 1289
60f8b39c 1290 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1291 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1292 rates |= BIT(j);
d61272cb
TW		 1293 if (is_basic)
1294 basic_rates |= BIT(j);
1295 break;
1296 }
60f8b39c 1297 }
1ebebea8 1298 }
f0706e82 1299
323ce79a 1300 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1301 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1302
1303 /* cf. IEEE 802.11 9.2.12 */
1304 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1305 have_higher_than_11mbit)
1306 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1307 else
1308 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1309
ae5eb026
JB		 1310 if (elems.ht_cap_elem)
1311 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1312 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1313
1314 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1315
4b7679a5 1316 rate_control_rate_init(sta);
f0706e82 1317
46900298 1318 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1319 set_sta_flags(sta, WLAN_STA_MFP);
1320
ddf4ac53 1321 if (elems.wmm_param)
60f8b39c 1322 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1323
1324 if (newsta) {
1325 int err = sta_info_insert(sta);
1326 if (err) {
1327 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1328 " the AP (error %d)\n", sdata->dev->name, err);
1329 rcu_read_unlock();
1330 return;
1331 }
1332 }
1333
1334 rcu_read_unlock();
1335
1336 if (elems.wmm_param)
46900298 1337 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1338 elems.wmm_param_len);
f0706e82 1339
ae5eb026 1340 if (elems.ht_info_elem && elems.wmm_param &&
46900298
JB		 1341 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1342 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026
JB		 1343 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1344 ap_ht_cap_flags);
1345
60f8b39c
JB		 1346 /* set AID and assoc capability,
1347 * ieee80211_set_associated() will tell the driver */
1348 bss_conf->aid = aid;
1349 bss_conf->assoc_capability = capab_info;
46900298 1350 ieee80211_set_associated(sdata, changed);
f0706e82 1351
46900298 1352 ieee80211_associated(sdata);
f0706e82
JB		 1353}
1354
1355
98c8fccf
JB		 1356static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1357 struct ieee80211_mgmt *mgmt,
1358 size_t len,
1359 struct ieee80211_rx_status *rx_status,
1360 struct ieee802_11_elems *elems,
1361 bool beacon)
1362{
1363 struct ieee80211_local *local = sdata->local;
1364 int freq;
c2b13452 1365 struct ieee80211_bss *bss;
98c8fccf 1366 struct ieee80211_channel *channel;
98c8fccf
JB		 1367
1368 if (elems->ds_params && elems->ds_params_len == 1)
1369 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1370 else
1371 freq = rx_status->freq;
1372
1373 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1374
1375 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1376 return;
1377
98c8fccf 1378 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1379 channel, beacon);
98c8fccf
JB		 1380 if (!bss)
1381 return;
1382
c481ec97 1383 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
46900298 1384 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
c481ec97
S		 1385 struct ieee80211_channel_sw_ie *sw_elem =
1386 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1387 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1388 }
1389
3e122be0 1390 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1391}
1392
1393
f698d856 1394static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1395 struct ieee80211_mgmt *mgmt,
1396 size_t len,
1397 struct ieee80211_rx_status *rx_status)
1398{
ae6a44e3
EK		 1399 size_t baselen;
1400 struct ieee802_11_elems elems;
1401
8e7cdbb6
TW		 1402 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1403 return; /* ignore ProbeResp to foreign address */
1404
ae6a44e3
EK		 1405 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1406 if (baselen > len)
1407 return;
1408
1409 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1410 &elems);
1411
98c8fccf 1412 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1413
1414 /* direct probe may be part of the association flow */
1415 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
46900298 1416 &sdata->u.mgd.request)) {
9859b81e
RR		 1417 printk(KERN_DEBUG "%s direct probe responded\n",
1418 sdata->dev->name);
46900298 1419 ieee80211_authenticate(sdata);
9859b81e 1420 }
f0706e82
JB		 1421}
1422
f698d856 1423static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1424 struct ieee80211_mgmt *mgmt,
1425 size_t len,
1426 struct ieee80211_rx_status *rx_status)
1427{
46900298 1428 struct ieee80211_if_managed *ifmgd;
f0706e82
JB		 1429 size_t baselen;
1430 struct ieee802_11_elems elems;
f698d856 1431 struct ieee80211_local *local = sdata->local;
471b3efd 1432 u32 changed = 0;
1fb3606b 1433 bool erp_valid, directed_tim;
7a5158ef 1434 u8 erp_value = 0;
f0706e82 1435
ae6a44e3
EK		 1436 /* Process beacon from the current BSS */
1437 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1438 if (baselen > len)
1439 return;
1440
1441 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1442
98c8fccf 1443 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1444
05c914fe 1445 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82 1446 return;
f0706e82 1447
46900298
JB		 1448 ifmgd = &sdata->u.mgd;
1449
1450 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1451 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1452 return;
1453
c481ec97
S		 1454 if (rx_status->freq != local->hw.conf.channel->center_freq)
1455 return;
1456
46900298 1457 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
fe3fa827
JB		 1458 elems.wmm_param_len);
1459
4be8c387
JB		 1460 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1461 local->hw.conf.flags & IEEE80211_CONF_PS) {
46900298 1462 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
a97b77b9 1463
1fb3606b 1464 if (directed_tim) {
572e0012
KV		 1465 if (local->hw.conf.dynamic_ps_timeout > 0) {
1466 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1467 ieee80211_hw_config(local,
1468 IEEE80211_CONF_CHANGE_PS);
1469 ieee80211_send_nullfunc(local, sdata, 0);
1470 } else {
1471 local->pspolling = true;
1472
1473 /*
1474 * Here is assumed that the driver will be
1475 * able to send ps-poll frame and receive a
1476 * response even though power save mode is
1477 * enabled, but some drivers might require
1478 * to disable power save here. This needs
1479 * to be investigated.
1480 */
1481 ieee80211_send_pspoll(local, sdata);
1482 }
a97b77b9
VN		 1483 }
1484 }
7a5158ef
JB		 1485
1486 if (elems.erp_info && elems.erp_info_len >= 1) {
1487 erp_valid = true;
1488 erp_value = elems.erp_info[0];
1489 } else {
1490 erp_valid = false;
50c4afb9 1491 }
7a5158ef
JB		 1492 changed |= ieee80211_handle_bss_capability(sdata,
1493 le16_to_cpu(mgmt->u.beacon.capab_info),
1494 erp_valid, erp_value);
f0706e82 1495
d3c990fb 1496
53d6f81c 1497 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
46900298 1498 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
ae5eb026
JB		 1499 struct sta_info *sta;
1500 struct ieee80211_supported_band *sband;
1501 u16 ap_ht_cap_flags;
1502
1503 rcu_read_lock();
1504
46900298 1505 sta = sta_info_get(local, ifmgd->bssid);
ae5eb026
JB		 1506 if (!sta) {
1507 rcu_read_unlock();
1508 return;
1509 }
1510
1511 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1512
1513 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1514 elems.ht_cap_elem, &sta->sta.ht_cap);
1515
1516 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1517
1518 rcu_read_unlock();
1519
1520 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1521 ap_ht_cap_flags);
d3c990fb
RR		 1522 }
1523
3f2355cb
LR		 1524 if (elems.country_elem) {
1525 /* Note we are only reviewing this on beacons
1526 * for the BSSID we are associated to */
1527 regulatory_hint_11d(local->hw.wiphy,
1528 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1529
1530 /* TODO: IBSS also needs this */
1531 if (elems.pwr_constr_elem)
1532 ieee80211_handle_pwr_constr(sdata,
1533 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1534 elems.pwr_constr_elem,
1535 elems.pwr_constr_elem_len);
3f2355cb
LR		 1536 }
1537
471b3efd 1538 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1539}
1540
46900298
JB		 1541ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1542 struct sk_buff *skb,
1543 struct ieee80211_rx_status *rx_status)
f0706e82 1544{
f698d856 1545 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1546 struct ieee80211_mgmt *mgmt;
1547 u16 fc;
1548
1549 if (skb->len < 24)
46900298 1550 return RX_DROP_MONITOR;
f0706e82
JB		 1551
1552 mgmt = (struct ieee80211_mgmt *) skb->data;
1553 fc = le16_to_cpu(mgmt->frame_control);
1554
1555 switch (fc & IEEE80211_FCTL_STYPE) {
1556 case IEEE80211_STYPE_PROBE_REQ:
1557 case IEEE80211_STYPE_PROBE_RESP:
1558 case IEEE80211_STYPE_BEACON:
1559 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1560 case IEEE80211_STYPE_AUTH:
1561 case IEEE80211_STYPE_ASSOC_RESP:
1562 case IEEE80211_STYPE_REASSOC_RESP:
1563 case IEEE80211_STYPE_DEAUTH:
1564 case IEEE80211_STYPE_DISASSOC:
46900298
JB		 1565 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1566 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1567 return RX_QUEUED;
f0706e82
JB		 1568 }
1569
46900298 1570 return RX_DROP_MONITOR;
f0706e82
JB		 1571}
1572
f698d856 1573static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1574 struct sk_buff *skb)
1575{
1576 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1577 struct ieee80211_mgmt *mgmt;
1578 u16 fc;
1579
f0706e82
JB		 1580 rx_status = (struct ieee80211_rx_status *) skb->cb;
1581 mgmt = (struct ieee80211_mgmt *) skb->data;
1582 fc = le16_to_cpu(mgmt->frame_control);
1583
46900298
JB		 1584 switch (fc & IEEE80211_FCTL_STYPE) {
1585 case IEEE80211_STYPE_PROBE_RESP:
1586 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1587 rx_status);
1588 break;
1589 case IEEE80211_STYPE_BEACON:
1590 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1591 rx_status);
1592 break;
1593 case IEEE80211_STYPE_AUTH:
1594 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1595 break;
1596 case IEEE80211_STYPE_ASSOC_RESP:
1597 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1598 break;
1599 case IEEE80211_STYPE_REASSOC_RESP:
1600 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1601 break;
1602 case IEEE80211_STYPE_DEAUTH:
1603 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1604 break;
1605 case IEEE80211_STYPE_DISASSOC:
1606 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1607 break;
f0706e82
JB		 1608 }
1609
1610 kfree_skb(skb);
1611}
1612
9c6bd790 1613static void ieee80211_sta_timer(unsigned long data)
f0706e82 1614{
60f8b39c
JB		 1615 struct ieee80211_sub_if_data *sdata =
1616 (struct ieee80211_sub_if_data *) data;
46900298 1617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1618 struct ieee80211_local *local = sdata->local;
f0706e82 1619
46900298
JB		 1620 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1621 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1622}
1623
46900298 1624static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 1625{
46900298 1626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1627 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1628
1629 if (local->ops->reset_tsf) {
1630 /* Reset own TSF to allow time synchronization work. */
1631 local->ops->reset_tsf(local_to_hw(local));
1632 }
1633
46900298 1634 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
f0706e82
JB		 1635
1636
46900298
JB		 1637 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1638 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1639 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1640 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1641 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1642 ifmgd->auth_alg = WLAN_AUTH_LEAP;
f0706e82 1643 else
46900298
JB		 1644 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1645 ifmgd->auth_transaction = -1;
1646 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1647 ifmgd->assoc_scan_tries = 0;
1648 ifmgd->direct_probe_tries = 0;
1649 ifmgd->auth_tries = 0;
1650 ifmgd->assoc_tries = 0;
24e64622 1651 netif_tx_stop_all_queues(sdata->dev);
f698d856 1652 netif_carrier_off(sdata->dev);
f0706e82
JB		 1653}
1654
46900298 1655static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 1656{
46900298 1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1658 struct ieee80211_local *local = sdata->local;
c2b13452 1659 struct ieee80211_bss *bss;
46900298
JB		 1660 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1661 u8 ssid_len = ifmgd->ssid_len;
00d3f14c
JB		 1662 u16 capa_mask = WLAN_CAPABILITY_ESS;
1663 u16 capa_val = WLAN_CAPABILITY_ESS;
1664 struct ieee80211_channel *chan = local->oper_channel;
1665
46900298 1666 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
00d3f14c
JB		 1667 IEEE80211_STA_AUTO_BSSID_SEL |
1668 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1669 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1670 if (sdata->default_key)
1671 capa_val |= WLAN_CAPABILITY_PRIVACY;
f0706e82 1672 }
9d139c81 1673
46900298 1674 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
00d3f14c
JB		 1675 chan = NULL;
1676
46900298 1677 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
00d3f14c
JB		 1678 bssid = NULL;
1679
46900298 1680 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
00d3f14c
JB		 1681 ssid = NULL;
1682 ssid_len = 0;
1683 }
1684
1685 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1686 bssid, ssid, ssid_len,
1687 capa_mask, capa_val);
1688
1689 if (bss) {
1690 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
46900298 1691 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
00d3f14c
JB		 1692 ieee80211_sta_set_ssid(sdata, bss->ssid,
1693 bss->ssid_len);
1694 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1695 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1696 bss->supp_rates);
46900298
JB		 1697 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1698 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
fdfacf0a 1699 else
46900298 1700 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 1701
9c6bd790
JB		 1702 /* Send out direct probe if no probe resp was received or
1703 * the one we have is outdated
1704 */
00d3f14c
JB		 1705 if (!bss->last_probe_resp ||
1706 time_after(jiffies, bss->last_probe_resp
9c6bd790 1707 + IEEE80211_SCAN_RESULT_EXPIRE))
46900298 1708 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
9c6bd790 1709 else
46900298 1710 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 1711
00d3f14c 1712 ieee80211_rx_bss_put(local, bss);
46900298 1713 ieee80211_sta_reset_auth(sdata);
9c6bd790
JB		 1714 return 0;
1715 } else {
46900298
JB		 1716 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1717 ifmgd->assoc_scan_tries++;
2a519311
JB		 1718 /* XXX maybe racy? */
1719 if (local->scan_req)
1720 return -1;
1721 memcpy(local->int_scan_req.ssids[0].ssid,
46900298
JB		 1722 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1723 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
2a519311 1724 local->int_scan_req.ssids[0].ssid_len = 0;
9c6bd790 1725 else
46900298 1726 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
2a519311 1727 ieee80211_start_scan(sdata, &local->int_scan_req);
46900298
JB		 1728 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1729 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
e374055a 1730 } else {
46900298
JB		 1731 ifmgd->assoc_scan_tries = 0;
1732 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
e374055a 1733 }
9c6bd790
JB		 1734 }
1735 return -1;
1736}
1737
1738
1739static void ieee80211_sta_work(struct work_struct *work)
1740{
1741 struct ieee80211_sub_if_data *sdata =
46900298 1742 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1743 struct ieee80211_local *local = sdata->local;
46900298 1744 struct ieee80211_if_managed *ifmgd;
9c6bd790
JB		 1745 struct sk_buff *skb;
1746
1747 if (!netif_running(sdata->dev))
1748 return;
1749
c2b13452 1750 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 1751 return;
1752
46900298 1753 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1754 return;
46900298 1755 ifmgd = &sdata->u.mgd;
f0706e82 1756
46900298 1757 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 1758 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1759
46900298
JB		 1760 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1761 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1762 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1763 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2a519311 1764 ieee80211_start_scan(sdata, local->scan_req);
9c6bd790 1765 return;
f0706e82
JB		 1766 }
1767
46900298
JB		 1768 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1769 if (ieee80211_sta_config_auth(sdata))
9c6bd790 1770 return;
46900298
JB		 1771 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1772 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
9c6bd790 1773 return;
d6f2da5b 1774
46900298 1775 switch (ifmgd->state) {
9c6bd790
JB		 1776 case IEEE80211_STA_MLME_DISABLED:
1777 break;
1778 case IEEE80211_STA_MLME_DIRECT_PROBE:
46900298 1779 ieee80211_direct_probe(sdata);
9c6bd790
JB		 1780 break;
1781 case IEEE80211_STA_MLME_AUTHENTICATE:
46900298 1782 ieee80211_authenticate(sdata);
9c6bd790
JB		 1783 break;
1784 case IEEE80211_STA_MLME_ASSOCIATE:
46900298 1785 ieee80211_associate(sdata);
9c6bd790
JB		 1786 break;
1787 case IEEE80211_STA_MLME_ASSOCIATED:
46900298 1788 ieee80211_associated(sdata);
9c6bd790
JB		 1789 break;
1790 default:
1791 WARN_ON(1);
1792 break;
1793 }
1794
46900298 1795 if (ieee80211_privacy_mismatch(sdata)) {
9c6bd790
JB		 1796 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1797 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1798
46900298 1799 ieee80211_set_disassoc(sdata, false, true,
9c6bd790
JB		 1800 WLAN_REASON_UNSPECIFIED);
1801 }
f0706e82
JB		 1802}
1803
9c6bd790
JB		 1804static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1805{
05c914fe 1806 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790 1807 queue_work(sdata->local->hw.workqueue,
46900298 1808 &sdata->u.mgd.work);
9c6bd790 1809}
f0706e82 1810
9c6bd790
JB		 1811/* interface setup */
1812void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1813{
46900298 1814 struct ieee80211_if_managed *ifmgd;
988c0f72 1815
46900298
JB		 1816 ifmgd = &sdata->u.mgd;
1817 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1818 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1819 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 1820 (unsigned long) sdata);
46900298 1821 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 1822 (unsigned long) sdata);
46900298 1823 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 1824
46900298
JB		 1825 ifmgd->capab = WLAN_CAPABILITY_ESS;
1826 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
9c6bd790 1827 IEEE80211_AUTH_ALG_SHARED_KEY;
46900298 1828 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
9c6bd790
JB		 1829 IEEE80211_STA_AUTO_BSSID_SEL |
1830 IEEE80211_STA_AUTO_CHANNEL_SEL;
1831 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
46900298 1832 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 1833}
1834
9c6bd790 1835/* configuration hooks */
46900298 1836void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
60f8b39c 1837{
46900298 1838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1839 struct ieee80211_local *local = sdata->local;
60f8b39c 1840
46900298 1841 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1842 return;
60f8b39c 1843
46900298 1844 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
9c6bd790 1845 IEEE80211_STA_AUTO_BSSID_SEL)) &&
46900298 1846 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
9c6bd790 1847 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 1848
46900298
JB		 1849 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1850 ieee80211_set_disassoc(sdata, true, true,
9c6bd790 1851 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 1852
46900298
JB		 1853 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1854 queue_work(local->hw.workqueue, &ifmgd->work);
9c6bd790
JB		 1855 }
1856}
60f8b39c 1857
9c6bd790
JB		 1858int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1859{
46900298 1860 struct ieee80211_if_managed *ifmgd;
60f8b39c 1861
9c6bd790
JB		 1862 if (len > IEEE80211_MAX_SSID_LEN)
1863 return -EINVAL;
1864
46900298 1865 ifmgd = &sdata->u.mgd;
9c6bd790 1866
46900298
JB		 1867 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1868 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1869 memcpy(ifmgd->ssid, ssid, len);
1870 ifmgd->ssid_len = len;
60f8b39c 1871 }
60f8b39c 1872
46900298 1873 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
dfe67012 1874
9c6bd790 1875 if (len)
46900298 1876 ifmgd->flags |= IEEE80211_STA_SSID_SET;
9c6bd790 1877 else
46900298 1878 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
9c6bd790
JB		 1879
1880 return 0;
1881}
1882
1883int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1884{
46900298
JB		 1885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1886 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1887 *len = ifmgd->ssid_len;
9c6bd790
JB		 1888 return 0;
1889}
1890
1891int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1892{
46900298 1893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1894
dfe67012 1895 if (is_valid_ether_addr(bssid)) {
46900298
JB		 1896 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1897 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
dfe67012 1898 } else {
46900298
JB		 1899 memset(ifmgd->bssid, 0, ETH_ALEN);
1900 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
dfe67012
AF		 1901 }
1902
1903 if (netif_running(sdata->dev)) {
1904 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 1905 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1906 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 1907 }
1908 }
60f8b39c 1909
46900298 1910 return ieee80211_sta_set_ssid(sdata, ifmgd->ssid, ifmgd->ssid_len);
9c6bd790
JB		 1911}
1912
1913int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1914{
46900298 1915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1916
46900298 1917 kfree(ifmgd->extra_ie);
9c6bd790 1918 if (len == 0) {
46900298
JB		 1919 ifmgd->extra_ie = NULL;
1920 ifmgd->extra_ie_len = 0;
60f8b39c 1921 return 0;
60f8b39c 1922 }
46900298
JB		 1923 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1924 if (!ifmgd->extra_ie) {
1925 ifmgd->extra_ie_len = 0;
9c6bd790
JB		 1926 return -ENOMEM;
1927 }
46900298
JB		 1928 memcpy(ifmgd->extra_ie, ie, len);
1929 ifmgd->extra_ie_len = len;
9c6bd790 1930 return 0;
60f8b39c
JB		 1931}
1932
f698d856 1933int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 1934{
f4ea83dd 1935 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 1936 sdata->dev->name, reason);
f0706e82 1937
46900298 1938 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1939 return -EINVAL;
1940
46900298 1941 ieee80211_set_disassoc(sdata, true, true, reason);
f0706e82
JB		 1942 return 0;
1943}
1944
f698d856 1945int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 1946{
46900298 1947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1948
f4ea83dd 1949 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 1950 sdata->dev->name, reason);
f0706e82 1951
05c914fe 1952 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1953 return -EINVAL;
1954
46900298
JB		 1955 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
1956 return -ENOLINK;
f0706e82 1957
46900298 1958 ieee80211_set_disassoc(sdata, false, true, reason);
f0706e82
JB		 1959 return 0;
1960}
84363e6e 1961
9c6bd790
JB		 1962/* scan finished notification */
1963void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1964{
1965 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
9c6bd790
JB		 1966
1967 /* Restart STA timers */
1968 rcu_read_lock();
1969 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1970 ieee80211_restart_sta_timer(sdata);
1971 rcu_read_unlock();
1972}
520eb820
KV		 1973
1974void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1975{
1976 struct ieee80211_local *local =
1977 container_of(work, struct ieee80211_local,
1978 dynamic_ps_disable_work);
1979
1980 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1981 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1982 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1983 }
1984
1985 ieee80211_wake_queues_by_reason(&local->hw,
1986 IEEE80211_QUEUE_STOP_REASON_PS);
1987}
1988
1989void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1990{
1991 struct ieee80211_local *local =
1992 container_of(work, struct ieee80211_local,
1993 dynamic_ps_enable_work);
a97b77b9 1994 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 1995
1996 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1997 return;
1998
4be8c387
JB		 1999 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2000 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2001
4be8c387 2002 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2003 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2004}
2005
2006void ieee80211_dynamic_ps_timer(unsigned long data)
2007{
2008 struct ieee80211_local *local = (void *) data;
2009
2010 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2011}
46900298
JB		 2012
2013void ieee80211_send_nullfunc(struct ieee80211_local *local,
2014 struct ieee80211_sub_if_data *sdata,
2015 int powersave)
2016{
2017 struct sk_buff *skb;
2018 struct ieee80211_hdr *nullfunc;
2019 __le16 fc;
2020
2021 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2022 return;
2023
2024 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2025 if (!skb) {
2026 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2027 "frame\n", sdata->dev->name);
2028 return;
2029 }
2030 skb_reserve(skb, local->hw.extra_tx_headroom);
2031
2032 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2033 memset(nullfunc, 0, 24);
2034 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2035 IEEE80211_FCTL_TODS);
2036 if (powersave)
2037 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2038 nullfunc->frame_control = fc;
2039 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2040 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2041 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2042
2043 ieee80211_tx_skb(sdata, skb, 0);
2044}
Linux kernel - Deliverables
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