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atmel: checkpatch.pl cleanups
[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
f0706e82
JB		 420 local->wmm_acm = 0;
421 for (; left >= 4; left -= 4, pos += 4) {
422 int aci = (pos[0] >> 5) & 0x03;
423 int acm = (pos[0] >> 4) & 0x01;
424 int queue;
425
426 switch (aci) {
0eeb59fe 427 case 1: /* AC_BK */
e100bb64 428 queue = 3;
988c0f72 429 if (acm)
0eeb59fe 430 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 431 break;
0eeb59fe 432 case 2: /* AC_VI */
e100bb64 433 queue = 1;
988c0f72 434 if (acm)
0eeb59fe 435 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 436 break;
0eeb59fe 437 case 3: /* AC_VO */
e100bb64 438 queue = 0;
988c0f72 439 if (acm)
0eeb59fe 440 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 441 break;
0eeb59fe 442 case 0: /* AC_BE */
f0706e82 443 default:
e100bb64 444 queue = 2;
988c0f72 445 if (acm)
0eeb59fe 446 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 447 break;
448 }
449
450 params.aifs = pos[0] & 0x0f;
451 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
452 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 453 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 454#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 455 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 456 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 457 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 458 params.cw_max, params.txop);
459#endif
0eeb59fe
JM		 460 if (local->ops->conf_tx &&
461 local->ops->conf_tx(local_to_hw(local), queue, &params)) {
f0706e82 462 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 463 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 464 }
465 }
466}
467
1fb3606b 468static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
a97b77b9
VN		 469{
470 u8 mask;
471 u8 index, indexn1, indexn2;
472 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
473
474 aid &= 0x3fff;
475 index = aid / 8;
476 mask = 1 << (aid & 7);
477
a97b77b9
VN		 478 indexn1 = tim->bitmap_ctrl & 0xfe;
479 indexn2 = elems->tim_len + indexn1 - 4;
480
481 if (index < indexn1 || index > indexn2)
482 return false;
483
484 index -= indexn1;
485
486 return !!(tim->virtual_map[index] & mask);
487}
488
7a5158ef
JB		 489static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
490 u16 capab, bool erp_valid, u8 erp)
5628221c 491{
bda3933a 492 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 493#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
46900298 494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
ebd74487 495#endif
471b3efd 496 u32 changed = 0;
7a5158ef
JB		 497 bool use_protection;
498 bool use_short_preamble;
499 bool use_short_slot;
500
501 if (erp_valid) {
502 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
503 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
504 } else {
505 use_protection = false;
506 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
507 }
508
509 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 510
471b3efd 511 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 512#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 513 if (net_ratelimit()) {
0c68ae26 514 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 515 sdata->dev->name,
5628221c 516 use_protection ? "enabled" : "disabled",
46900298 517 ifmgd->bssid);
5628221c 518 }
f4ea83dd 519#endif
471b3efd
JB		 520 bss_conf->use_cts_prot = use_protection;
521 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 522 }
7e9ed188 523
d43c7b37 524 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 525#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 526 if (net_ratelimit()) {
527 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 528 " (BSSID=%pM)\n",
471b3efd 529 sdata->dev->name,
d43c7b37 530 use_short_preamble ? "short" : "long",
46900298 531 ifmgd->bssid);
7e9ed188 532 }
f4ea83dd 533#endif
d43c7b37 534 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 535 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 536 }
d9430a32 537
7a5158ef
JB		 538 if (use_short_slot != bss_conf->use_short_slot) {
539#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
540 if (net_ratelimit()) {
391429c1
CL		 541 printk(KERN_DEBUG "%s: switched to %s slot time"
542 " (BSSID=%pM)\n",
7a5158ef
JB		 543 sdata->dev->name,
544 use_short_slot ? "short" : "long",
46900298 545 ifmgd->bssid);
7a5158ef
JB		 546 }
547#endif
548 bss_conf->use_short_slot = use_short_slot;
549 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 550 }
551
552 return changed;
553}
554
46900298 555static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata)
f5e5bf25
TW		 556{
557 union iwreq_data wrqu;
46900298 558
f5e5bf25 559 memset(&wrqu, 0, sizeof(wrqu));
46900298
JB		 560 if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)
561 memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN);
f5e5bf25
TW		 562 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
563 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
564}
565
46900298 566static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata)
f0706e82 567{
46900298 568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
74af0250
LT		 569 char *buf;
570 size_t len;
571 int i;
f0706e82
JB		 572 union iwreq_data wrqu;
573
46900298 574 if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies)
74af0250
LT		 575 return;
576
46900298
JB		 577 buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len +
578 ifmgd->assocresp_ies_len), GFP_KERNEL);
74af0250
LT		 579 if (!buf)
580 return;
581
582 len = sprintf(buf, "ASSOCINFO(");
46900298 583 if (ifmgd->assocreq_ies) {
74af0250 584 len += sprintf(buf + len, "ReqIEs=");
46900298 585 for (i = 0; i < ifmgd->assocreq_ies_len; i++) {
74af0250 586 len += sprintf(buf + len, "%02x",
46900298 587 ifmgd->assocreq_ies[i]);
74af0250 588 }
f0706e82 589 }
46900298
JB		 590 if (ifmgd->assocresp_ies) {
591 if (ifmgd->assocreq_ies)
74af0250
LT		 592 len += sprintf(buf + len, " ");
593 len += sprintf(buf + len, "RespIEs=");
46900298 594 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 595 len += sprintf(buf + len, "%02x",
46900298 596 ifmgd->assocresp_ies[i]);
74af0250 597 }
f0706e82 598 }
74af0250
LT		 599 len += sprintf(buf + len, ")");
600
601 if (len > IW_CUSTOM_MAX) {
602 len = sprintf(buf, "ASSOCRESPIE=");
46900298 603 for (i = 0; i < ifmgd->assocresp_ies_len; i++) {
74af0250 604 len += sprintf(buf + len, "%02x",
46900298 605 ifmgd->assocresp_ies[i]);
74af0250
LT		 606 }
607 }
608
ad788b5e
JL		 609 if (len <= IW_CUSTOM_MAX) {
610 memset(&wrqu, 0, sizeof(wrqu));
611 wrqu.data.length = len;
612 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
613 }
74af0250
LT		 614
615 kfree(buf);
f0706e82
JB		 616}
617
618
f698d856 619static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026 620 u32 bss_info_changed)
f0706e82 621{
46900298 622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 623 struct ieee80211_local *local = sdata->local;
38668c05 624 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 625
c2b13452 626 struct ieee80211_bss *bss;
d6f2da5b 627
ae5eb026 628 bss_info_changed |= BSS_CHANGED_ASSOC;
46900298 629 ifmgd->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 630
46900298 631 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
f5e5bf25 632 conf->channel->center_freq,
46900298 633 ifmgd->ssid, ifmgd->ssid_len);
f5e5bf25
TW		 634 if (bss) {
635 /* set timing information */
00d3f14c
JB		 636 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
637 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
bda3933a 638 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 639
ae5eb026 640 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
00d3f14c 641 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 642
643 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 644 }
645
46900298
JB		 646 ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET;
647 memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN);
648 ieee80211_sta_send_associnfo(sdata);
9306102e 649
46900298 650 ifmgd->last_probe = jiffies;
9ac19a90 651 ieee80211_led_assoc(local, 1);
9306102e 652
bda3933a 653 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 654 /*
655 * For now just always ask the driver to update the basic rateset
656 * when we have associated, we aren't checking whether it actually
657 * changed or not.
658 */
ae5eb026
JB		 659 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
660 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 661
4be8c387
JB		 662 if (local->powersave) {
663 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
664 local->hw.conf.dynamic_ps_timeout > 0) {
520eb820 665 mod_timer(&local->dynamic_ps_timer, jiffies +
46f2c4bd
JB		 666 msecs_to_jiffies(
667 local->hw.conf.dynamic_ps_timeout));
4be8c387
JB		 668 } else {
669 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
670 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 671 conf->flags |= IEEE80211_CONF_PS;
4be8c387 672 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
520eb820 673 }
e0cb686f
KV		 674 }
675
9ac19a90
JB		 676 netif_tx_start_all_queues(sdata->dev);
677 netif_carrier_on(sdata->dev);
f0706e82 678
46900298 679 ieee80211_sta_send_apinfo(sdata);
f0706e82
JB		 680}
681
46900298 682static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata)
f0706e82 683{
46900298
JB		 684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
685
686 ifmgd->direct_probe_tries++;
687 if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 688 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
46900298
JB		 689 sdata->dev->name, ifmgd->bssid);
690 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
691 ieee80211_sta_send_apinfo(sdata);
7a947080
VT		 692
693 /*
694 * Most likely AP is not in the range so remove the
695 * bss information associated to the AP
696 */
46900298 697 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 698 sdata->local->hw.conf.channel->center_freq,
46900298 699 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 700 return;
701 }
f0706e82 702
0c68ae26 703 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
46900298
JB		 704 sdata->dev->name, ifmgd->bssid,
705 ifmgd->direct_probe_tries);
f0706e82 706
46900298 707 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 708
46900298 709 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request);
9ac19a90
JB		 710
711 /* Direct probe is sent to broadcast address as some APs
712 * will not answer to direct packet in unassociated state.
713 */
714 ieee80211_send_probe_req(sdata, NULL,
70692ad2 715 ifmgd->ssid, ifmgd->ssid_len, NULL, 0);
9ac19a90 716
46900298 717 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 718}
f0706e82 719
9ac19a90 720
46900298 721static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata)
f0706e82 722{
46900298
JB		 723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
724
725 ifmgd->auth_tries++;
726 if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 727 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 728 " timed out\n",
46900298
JB		 729 sdata->dev->name, ifmgd->bssid);
730 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
731 ieee80211_sta_send_apinfo(sdata);
732 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 733 sdata->local->hw.conf.channel->center_freq,
46900298 734 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 735 return;
736 }
f0706e82 737
46900298 738 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26 739 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
46900298 740 sdata->dev->name, ifmgd->bssid);
f0706e82 741
46900298
JB		 742 ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0,
743 ifmgd->bssid, 0);
744 ifmgd->auth_transaction = 2;
9ac19a90 745
46900298 746 mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 747}
748
5925d976
VN		 749/*
750 * The disassoc 'reason' argument can be either our own reason
751 * if self disconnected or a reason code from the AP.
752 */
aa458d17 753static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
46900298
JB		 754 bool deauth, bool self_disconnected,
755 u16 reason)
aa458d17 756{
46900298 757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 758 struct ieee80211_local *local = sdata->local;
759 struct sta_info *sta;
e0cb686f 760 u32 changed = 0, config_changed = 0;
aa458d17
TW		 761
762 rcu_read_lock();
763
46900298 764 sta = sta_info_get(local, ifmgd->bssid);
aa458d17
TW		 765 if (!sta) {
766 rcu_read_unlock();
767 return;
768 }
769
770 if (deauth) {
46900298
JB		 771 ifmgd->direct_probe_tries = 0;
772 ifmgd->auth_tries = 0;
aa458d17 773 }
46900298
JB		 774 ifmgd->assoc_scan_tries = 0;
775 ifmgd->assoc_tries = 0;
aa458d17 776
24e64622 777 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 778 netif_carrier_off(sdata->dev);
779
2dace10e 780 ieee80211_sta_tear_down_BA_sessions(sta);
aa458d17
TW		 781
782 if (self_disconnected) {
783 if (deauth)
ef422bc0
JB		 784 ieee80211_send_deauth_disassoc(sdata,
785 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 786 else
ef422bc0
JB		 787 ieee80211_send_deauth_disassoc(sdata,
788 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 789 }
790
46900298 791 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
f5e5bf25
TW		 792 changed |= ieee80211_reset_erp_info(sdata);
793
f5e5bf25 794 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 795 changed |= BSS_CHANGED_ASSOC;
796 sdata->vif.bss_conf.assoc = false;
f5e5bf25 797
46900298 798 ieee80211_sta_send_apinfo(sdata);
aa458d17 799
7a947080 800 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
46900298
JB		 801 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
802 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 803 sdata->local->hw.conf.channel->center_freq,
46900298 804 ifmgd->ssid, ifmgd->ssid_len);
7a947080 805 }
aa458d17 806
aa458d17
TW		 807 rcu_read_unlock();
808
4797938c 809 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 810 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 811
a8302de9
VT		 812 local->power_constr_level = 0;
813
520eb820
KV		 814 del_timer_sync(&local->dynamic_ps_timer);
815 cancel_work_sync(&local->dynamic_ps_enable_work);
816
e0cb686f
KV		 817 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
818 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
819 config_changed |= IEEE80211_CONF_CHANGE_PS;
820 }
ae5eb026 821
e0cb686f 822 ieee80211_hw_config(local, config_changed);
ae5eb026 823 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 824
825 rcu_read_lock();
826
46900298 827 sta = sta_info_get(local, ifmgd->bssid);
8e268e47
TW		 828 if (!sta) {
829 rcu_read_unlock();
830 return;
831 }
832
833 sta_info_unlink(&sta);
834
835 rcu_read_unlock();
836
837 sta_info_destroy(sta);
aa458d17 838}
f0706e82 839
9ac19a90
JB		 840static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
841{
842 if (!sdata || !sdata->default_key ||
843 sdata->default_key->conf.alg != ALG_WEP)
844 return 0;
845 return 1;
846}
847
46900298 848static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata)
f0706e82 849{
46900298 850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 851 struct ieee80211_local *local = sdata->local;
c2b13452 852 struct ieee80211_bss *bss;
5b98b1f7
JB		 853 int bss_privacy;
854 int wep_privacy;
855 int privacy_invoked;
f0706e82 856
46900298 857 if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 858 return 0;
859
46900298 860 bss = ieee80211_rx_bss_get(local, ifmgd->bssid,
8318d78a 861 local->hw.conf.channel->center_freq,
46900298 862 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 863 if (!bss)
864 return 0;
865
00d3f14c 866 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
f698d856 867 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
46900298 868 privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 869
3e122be0 870 ieee80211_rx_bss_put(local, bss);
f0706e82 871
5b98b1f7
JB		 872 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
873 return 0;
874
875 return 1;
f0706e82
JB		 876}
877
46900298 878static void ieee80211_associate(struct ieee80211_sub_if_data *sdata)
f0706e82 879{
46900298
JB		 880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
881
882 ifmgd->assoc_tries++;
883 if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 884 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 885 " timed out\n",
46900298
JB		 886 sdata->dev->name, ifmgd->bssid);
887 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
888 ieee80211_sta_send_apinfo(sdata);
889 ieee80211_rx_bss_remove(sdata, ifmgd->bssid,
7a947080 890 sdata->local->hw.conf.channel->center_freq,
46900298 891 ifmgd->ssid, ifmgd->ssid_len);
f0706e82
JB		 892 return;
893 }
894
46900298 895 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26 896 printk(KERN_DEBUG "%s: associate with AP %pM\n",
46900298
JB		 897 sdata->dev->name, ifmgd->bssid);
898 if (ieee80211_privacy_mismatch(sdata)) {
f0706e82 899 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 900 "mixed-cell disabled - abort association\n", sdata->dev->name);
46900298 901 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 902 return;
903 }
904
46900298 905 ieee80211_send_assoc(sdata);
f0706e82 906
46900298 907 mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
f0706e82
JB		 908}
909
910
46900298 911static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
f0706e82 912{
46900298 913 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 914 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 915 struct sta_info *sta;
916 int disassoc;
917
918 /* TODO: start monitoring current AP signal quality and number of
919 * missed beacons. Scan other channels every now and then and search
920 * for better APs. */
921 /* TODO: remove expired BSSes */
922
46900298 923 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 924
d0709a65
JB		 925 rcu_read_lock();
926
46900298 927 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 928 if (!sta) {
0c68ae26 929 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
46900298 930 sdata->dev->name, ifmgd->bssid);
f0706e82
JB		 931 disassoc = 1;
932 } else {
933 disassoc = 0;
934 if (time_after(jiffies,
935 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
46900298 936 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 937 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 938 "current AP %pM - assume out of "
f0706e82 939 "range\n",
46900298 940 sdata->dev->name, ifmgd->bssid);
f0706e82 941 disassoc = 1;
d6f2da5b 942 } else
46900298
JB		 943 ieee80211_send_probe_req(sdata, ifmgd->bssid,
944 ifmgd->ssid,
70692ad2
JM		 945 ifmgd->ssid_len,
946 NULL, 0);
46900298 947 ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 948 } else {
46900298
JB		 949 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
950 if (time_after(jiffies, ifmgd->last_probe +
f0706e82 951 IEEE80211_PROBE_INTERVAL)) {
46900298
JB		 952 ifmgd->last_probe = jiffies;
953 ieee80211_send_probe_req(sdata, ifmgd->bssid,
954 ifmgd->ssid,
70692ad2
JM		 955 ifmgd->ssid_len,
956 NULL, 0);
f0706e82
JB		 957 }
958 }
f0706e82 959 }
d0709a65
JB		 960
961 rcu_read_unlock();
962
7a947080 963 if (disassoc)
46900298 964 ieee80211_set_disassoc(sdata, true, true,
60f8b39c 965 WLAN_REASON_PREV_AUTH_NOT_VALID);
7a947080 966 else
46900298 967 mod_timer(&ifmgd->timer, jiffies +
60f8b39c 968 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 969}
970
971
46900298 972static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata)
f0706e82 973{
46900298
JB		 974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
975
f698d856 976 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
46900298
JB		 977 ifmgd->flags |= IEEE80211_STA_AUTHENTICATED;
978 ieee80211_associate(sdata);
f0706e82
JB		 979}
980
981
f698d856 982static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 983 struct ieee80211_mgmt *mgmt,
984 size_t len)
985{
986 u8 *pos;
987 struct ieee802_11_elems elems;
988
f0706e82 989 pos = mgmt->u.auth.variable;
67a4cce4 990 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 991 if (!elems.challenge)
f0706e82 992 return;
46900298
JB		 993 ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg,
994 elems.challenge - 2, elems.challenge_len + 2,
995 sdata->u.mgd.bssid, 1);
996 sdata->u.mgd.auth_transaction = 4;
fe3d2c3f
JB		 997}
998
f698d856 999static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1000 struct ieee80211_mgmt *mgmt,
1001 size_t len)
1002{
46900298 1003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1004 u16 auth_alg, auth_transaction, status_code;
1005
46900298 1006 if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE)
f0706e82 1007 return;
f0706e82 1008
f4ea83dd 1009 if (len < 24 + 6)
f0706e82 1010 return;
f0706e82 1011
46900298 1012 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1013 return;
f0706e82 1014
46900298 1015 if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1016 return;
f0706e82
JB		 1017
1018 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1019 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1020 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1021
46900298
JB		 1022 if (auth_alg != ifmgd->auth_alg ||
1023 auth_transaction != ifmgd->auth_transaction)
f0706e82 1024 return;
f0706e82
JB		 1025
1026 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1027 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1028 u8 algs[3];
1029 const int num_algs = ARRAY_SIZE(algs);
1030 int i, pos;
1031 algs[0] = algs[1] = algs[2] = 0xff;
46900298 1032 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
f0706e82 1033 algs[0] = WLAN_AUTH_OPEN;
46900298 1034 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
f0706e82 1035 algs[1] = WLAN_AUTH_SHARED_KEY;
46900298 1036 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
f0706e82 1037 algs[2] = WLAN_AUTH_LEAP;
46900298 1038 if (ifmgd->auth_alg == WLAN_AUTH_OPEN)
f0706e82 1039 pos = 0;
46900298 1040 else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY)
f0706e82
JB		 1041 pos = 1;
1042 else
1043 pos = 2;
1044 for (i = 0; i < num_algs; i++) {
1045 pos++;
1046 if (pos >= num_algs)
1047 pos = 0;
46900298 1048 if (algs[pos] == ifmgd->auth_alg ||
f0706e82
JB		 1049 algs[pos] == 0xff)
1050 continue;
1051 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1052 !ieee80211_sta_wep_configured(sdata))
f0706e82 1053 continue;
46900298 1054 ifmgd->auth_alg = algs[pos];
f0706e82
JB		 1055 break;
1056 }
1057 }
1058 return;
1059 }
1060
46900298 1061 switch (ifmgd->auth_alg) {
f0706e82
JB		 1062 case WLAN_AUTH_OPEN:
1063 case WLAN_AUTH_LEAP:
46900298 1064 ieee80211_auth_completed(sdata);
f0706e82
JB		 1065 break;
1066 case WLAN_AUTH_SHARED_KEY:
46900298
JB		 1067 if (ifmgd->auth_transaction == 4)
1068 ieee80211_auth_completed(sdata);
f0706e82 1069 else
46900298 1070 ieee80211_auth_challenge(sdata, mgmt, len);
f0706e82
JB		 1071 break;
1072 }
1073}
1074
1075
f698d856 1076static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1077 struct ieee80211_mgmt *mgmt,
1078 size_t len)
1079{
46900298 1080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1081 u16 reason_code;
1082
f4ea83dd 1083 if (len < 24 + 2)
f0706e82 1084 return;
f0706e82 1085
46900298 1086 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1087 return;
f0706e82
JB		 1088
1089 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1090
46900298 1091 if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1092 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1093 sdata->dev->name, reason_code);
f0706e82 1094
46900298
JB		 1095 if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1096 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE ||
1097 ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1098 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1099 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1100 IEEE80211_RETRY_AUTH_INTERVAL);
1101 }
1102
46900298
JB		 1103 ieee80211_set_disassoc(sdata, true, false, 0);
1104 ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1105}
1106
1107
f698d856 1108static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1109 struct ieee80211_mgmt *mgmt,
1110 size_t len)
1111{
46900298 1112 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1113 u16 reason_code;
1114
f4ea83dd 1115 if (len < 24 + 2)
f0706e82 1116 return;
f0706e82 1117
46900298 1118 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1119 return;
f0706e82
JB		 1120
1121 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1122
46900298 1123 if (ifmgd->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1124 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1125 sdata->dev->name, reason_code);
f0706e82 1126
46900298
JB		 1127 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) {
1128 ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE;
1129 mod_timer(&ifmgd->timer, jiffies +
f0706e82
JB		 1130 IEEE80211_RETRY_AUTH_INTERVAL);
1131 }
1132
46900298 1133 ieee80211_set_disassoc(sdata, false, false, reason_code);
f0706e82
JB		 1134}
1135
1136
471b3efd 1137static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1138 struct ieee80211_mgmt *mgmt,
1139 size_t len,
1140 int reassoc)
1141{
46900298 1142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1143 struct ieee80211_local *local = sdata->local;
8318d78a 1144 struct ieee80211_supported_band *sband;
f0706e82 1145 struct sta_info *sta;
881d948c 1146 u32 rates, basic_rates;
f0706e82
JB		 1147 u16 capab_info, status_code, aid;
1148 struct ieee802_11_elems elems;
bda3933a 1149 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1150 u8 *pos;
ae5eb026 1151 u32 changed = 0;
f0706e82 1152 int i, j;
ddf4ac53 1153 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1154 u16 ap_ht_cap_flags;
f0706e82
JB		 1155
1156 /* AssocResp and ReassocResp have identical structure, so process both
1157 * of them in this function. */
1158
46900298 1159 if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1160 return;
f0706e82 1161
f4ea83dd 1162 if (len < 24 + 6)
f0706e82 1163 return;
f0706e82 1164
46900298 1165 if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1166 return;
f0706e82
JB		 1167
1168 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1169 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1170 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1171
0c68ae26 1172 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1173 "status=%d aid=%d)\n",
0c68ae26 1174 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1175 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1176
63a5ab82
JM		 1177 pos = mgmt->u.assoc_resp.variable;
1178 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1179
1180 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1181 elems.timeout_int && elems.timeout_int_len == 5 &&
1182 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1183 u32 tu, ms;
f797eb7e 1184 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1185 ms = tu * 1024 / 1000;
1186 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1187 "comeback duration %u TU (%u ms)\n",
1188 sdata->dev->name, tu, ms);
1189 if (ms > IEEE80211_ASSOC_TIMEOUT)
46900298 1190 mod_timer(&ifmgd->timer,
63a5ab82
JM		 1191 jiffies + msecs_to_jiffies(ms));
1192 return;
1193 }
1194
f0706e82
JB		 1195 if (status_code != WLAN_STATUS_SUCCESS) {
1196 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1197 sdata->dev->name, status_code);
8a69aa93
DD		 1198 /* if this was a reassociation, ensure we try a "full"
1199 * association next time. This works around some broken APs
1200 * which do not correctly reject reassociation requests. */
46900298 1201 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1202 return;
1203 }
1204
1dd84aa2
JB		 1205 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1206 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1207 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1208 aid &= ~(BIT(15) | BIT(14));
1209
f0706e82
JB		 1210 if (!elems.supp_rates) {
1211 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1212 sdata->dev->name);
f0706e82
JB		 1213 return;
1214 }
1215
f698d856 1216 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298
JB		 1217 ifmgd->aid = aid;
1218 ifmgd->ap_capab = capab_info;
f0706e82 1219
46900298
JB		 1220 kfree(ifmgd->assocresp_ies);
1221 ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1222 ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL);
1223 if (ifmgd->assocresp_ies)
1224 memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len);
f0706e82 1225
d0709a65
JB		 1226 rcu_read_lock();
1227
f0706e82 1228 /* Add STA entry for the AP */
46900298 1229 sta = sta_info_get(local, ifmgd->bssid);
f0706e82 1230 if (!sta) {
ddf4ac53 1231 newsta = true;
d0709a65 1232
46900298 1233 sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC);
73651ee6
JB		 1234 if (!sta) {
1235 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1236 " the AP\n", sdata->dev->name);
d0709a65 1237 rcu_read_unlock();
f0706e82
JB		 1238 return;
1239 }
f709fc69 1240
60f8b39c
JB		 1241 /* update new sta with its last rx activity */
1242 sta->last_rx = jiffies;
f709fc69 1243 }
f709fc69 1244
60f8b39c
JB		 1245 /*
1246 * FIXME: Do we really need to update the sta_info's information here?
1247 * We already know about the AP (we found it in our list) so it
1248 * should already be filled with the right info, no?
1249 * As is stands, all this is racy because typically we assume
1250 * the information that is filled in here (except flags) doesn't
1251 * change while a STA structure is alive. As such, it should move
1252 * to between the sta_info_alloc() and sta_info_insert() above.
1253 */
f709fc69 1254
60f8b39c
JB		 1255 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1256 WLAN_STA_AUTHORIZED);
05e5e883 1257
60f8b39c
JB		 1258 rates = 0;
1259 basic_rates = 0;
1260 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1261
60f8b39c
JB		 1262 for (i = 0; i < elems.supp_rates_len; i++) {
1263 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1264 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1265
60f8b39c
JB		 1266 if (rate > 110)
1267 have_higher_than_11mbit = true;
1268
1269 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1270 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1271 rates |= BIT(j);
d61272cb
TW		 1272 if (is_basic)
1273 basic_rates |= BIT(j);
1274 break;
1275 }
f709fc69 1276 }
f709fc69
LCC		 1277 }
1278
60f8b39c
JB		 1279 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1280 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1281 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1282
60f8b39c
JB		 1283 if (rate > 110)
1284 have_higher_than_11mbit = true;
f0706e82 1285
60f8b39c 1286 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1287 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1288 rates |= BIT(j);
d61272cb
TW		 1289 if (is_basic)
1290 basic_rates |= BIT(j);
1291 break;
1292 }
60f8b39c 1293 }
1ebebea8 1294 }
f0706e82 1295
323ce79a 1296 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1297 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1298
1299 /* cf. IEEE 802.11 9.2.12 */
1300 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1301 have_higher_than_11mbit)
1302 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1303 else
1304 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1305
e65c2263
S		 1306 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1307 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026 1308 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1309 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1310
1311 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1312
4b7679a5 1313 rate_control_rate_init(sta);
f0706e82 1314
46900298 1315 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1316 set_sta_flags(sta, WLAN_STA_MFP);
1317
ddf4ac53 1318 if (elems.wmm_param)
60f8b39c 1319 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1320
1321 if (newsta) {
1322 int err = sta_info_insert(sta);
1323 if (err) {
1324 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1325 " the AP (error %d)\n", sdata->dev->name, err);
1326 rcu_read_unlock();
1327 return;
1328 }
1329 }
1330
1331 rcu_read_unlock();
1332
1333 if (elems.wmm_param)
46900298 1334 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1335 elems.wmm_param_len);
f0706e82 1336
ae5eb026 1337 if (elems.ht_info_elem && elems.wmm_param &&
46900298
JB		 1338 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
1339 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))
ae5eb026
JB		 1340 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1341 ap_ht_cap_flags);
1342
60f8b39c
JB		 1343 /* set AID and assoc capability,
1344 * ieee80211_set_associated() will tell the driver */
1345 bss_conf->aid = aid;
1346 bss_conf->assoc_capability = capab_info;
46900298 1347 ieee80211_set_associated(sdata, changed);
f0706e82 1348
46900298 1349 ieee80211_associated(sdata);
f0706e82
JB		 1350}
1351
1352
98c8fccf
JB		 1353static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1354 struct ieee80211_mgmt *mgmt,
1355 size_t len,
1356 struct ieee80211_rx_status *rx_status,
1357 struct ieee802_11_elems *elems,
1358 bool beacon)
1359{
1360 struct ieee80211_local *local = sdata->local;
1361 int freq;
c2b13452 1362 struct ieee80211_bss *bss;
98c8fccf 1363 struct ieee80211_channel *channel;
98c8fccf
JB		 1364
1365 if (elems->ds_params && elems->ds_params_len == 1)
1366 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1367 else
1368 freq = rx_status->freq;
1369
1370 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1371
1372 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1373 return;
1374
98c8fccf 1375 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1376 channel, beacon);
98c8fccf
JB		 1377 if (!bss)
1378 return;
1379
c481ec97 1380 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
46900298 1381 (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) {
c481ec97
S		 1382 struct ieee80211_channel_sw_ie *sw_elem =
1383 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1384 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1385 }
1386
3e122be0 1387 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1388}
1389
1390
f698d856 1391static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1392 struct ieee80211_mgmt *mgmt,
1393 size_t len,
1394 struct ieee80211_rx_status *rx_status)
1395{
ae6a44e3
EK		 1396 size_t baselen;
1397 struct ieee802_11_elems elems;
1398
8e7cdbb6
TW		 1399 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1400 return; /* ignore ProbeResp to foreign address */
1401
ae6a44e3
EK		 1402 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1403 if (baselen > len)
1404 return;
1405
1406 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1407 &elems);
1408
98c8fccf 1409 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1410
1411 /* direct probe may be part of the association flow */
1412 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
46900298 1413 &sdata->u.mgd.request)) {
9859b81e
RR		 1414 printk(KERN_DEBUG "%s direct probe responded\n",
1415 sdata->dev->name);
46900298 1416 ieee80211_authenticate(sdata);
9859b81e 1417 }
f0706e82
JB		 1418}
1419
f698d856 1420static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1421 struct ieee80211_mgmt *mgmt,
1422 size_t len,
1423 struct ieee80211_rx_status *rx_status)
1424{
46900298 1425 struct ieee80211_if_managed *ifmgd;
f0706e82
JB		 1426 size_t baselen;
1427 struct ieee802_11_elems elems;
f698d856 1428 struct ieee80211_local *local = sdata->local;
471b3efd 1429 u32 changed = 0;
1fb3606b 1430 bool erp_valid, directed_tim;
7a5158ef 1431 u8 erp_value = 0;
f0706e82 1432
ae6a44e3
EK		 1433 /* Process beacon from the current BSS */
1434 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1435 if (baselen > len)
1436 return;
1437
1438 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1439
98c8fccf 1440 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1441
05c914fe 1442 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82 1443 return;
f0706e82 1444
46900298
JB		 1445 ifmgd = &sdata->u.mgd;
1446
1447 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) ||
1448 memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1449 return;
1450
c481ec97
S		 1451 if (rx_status->freq != local->hw.conf.channel->center_freq)
1452 return;
1453
46900298 1454 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
fe3fa827
JB		 1455 elems.wmm_param_len);
1456
25c9c875 1457 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
46900298 1458 directed_tim = ieee80211_check_tim(&elems, ifmgd->aid);
a97b77b9 1459
1fb3606b 1460 if (directed_tim) {
572e0012
KV		 1461 if (local->hw.conf.dynamic_ps_timeout > 0) {
1462 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1463 ieee80211_hw_config(local,
1464 IEEE80211_CONF_CHANGE_PS);
1465 ieee80211_send_nullfunc(local, sdata, 0);
1466 } else {
1467 local->pspolling = true;
1468
1469 /*
1470 * Here is assumed that the driver will be
1471 * able to send ps-poll frame and receive a
1472 * response even though power save mode is
1473 * enabled, but some drivers might require
1474 * to disable power save here. This needs
1475 * to be investigated.
1476 */
1477 ieee80211_send_pspoll(local, sdata);
1478 }
a97b77b9
VN		 1479 }
1480 }
7a5158ef
JB		 1481
1482 if (elems.erp_info && elems.erp_info_len >= 1) {
1483 erp_valid = true;
1484 erp_value = elems.erp_info[0];
1485 } else {
1486 erp_valid = false;
50c4afb9 1487 }
7a5158ef
JB		 1488 changed |= ieee80211_handle_bss_capability(sdata,
1489 le16_to_cpu(mgmt->u.beacon.capab_info),
1490 erp_valid, erp_value);
f0706e82 1491
d3c990fb 1492
53d6f81c 1493 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
46900298 1494 !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) {
ae5eb026
JB		 1495 struct sta_info *sta;
1496 struct ieee80211_supported_band *sband;
1497 u16 ap_ht_cap_flags;
1498
1499 rcu_read_lock();
1500
46900298 1501 sta = sta_info_get(local, ifmgd->bssid);
ae5eb026
JB		 1502 if (!sta) {
1503 rcu_read_unlock();
1504 return;
1505 }
1506
1507 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1508
1509 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1510 elems.ht_cap_elem, &sta->sta.ht_cap);
1511
1512 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1513
1514 rcu_read_unlock();
1515
1516 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1517 ap_ht_cap_flags);
d3c990fb
RR		 1518 }
1519
3f2355cb
LR		 1520 if (elems.country_elem) {
1521 /* Note we are only reviewing this on beacons
1522 * for the BSSID we are associated to */
1523 regulatory_hint_11d(local->hw.wiphy,
1524 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1525
1526 /* TODO: IBSS also needs this */
1527 if (elems.pwr_constr_elem)
1528 ieee80211_handle_pwr_constr(sdata,
1529 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1530 elems.pwr_constr_elem,
1531 elems.pwr_constr_elem_len);
3f2355cb
LR		 1532 }
1533
471b3efd 1534 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1535}
1536
46900298
JB		 1537ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1538 struct sk_buff *skb,
1539 struct ieee80211_rx_status *rx_status)
f0706e82 1540{
f698d856 1541 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1542 struct ieee80211_mgmt *mgmt;
1543 u16 fc;
1544
1545 if (skb->len < 24)
46900298 1546 return RX_DROP_MONITOR;
f0706e82
JB		 1547
1548 mgmt = (struct ieee80211_mgmt *) skb->data;
1549 fc = le16_to_cpu(mgmt->frame_control);
1550
1551 switch (fc & IEEE80211_FCTL_STYPE) {
1552 case IEEE80211_STYPE_PROBE_REQ:
1553 case IEEE80211_STYPE_PROBE_RESP:
1554 case IEEE80211_STYPE_BEACON:
1555 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1556 case IEEE80211_STYPE_AUTH:
1557 case IEEE80211_STYPE_ASSOC_RESP:
1558 case IEEE80211_STYPE_REASSOC_RESP:
1559 case IEEE80211_STYPE_DEAUTH:
1560 case IEEE80211_STYPE_DISASSOC:
46900298
JB		 1561 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1562 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1563 return RX_QUEUED;
f0706e82
JB		 1564 }
1565
46900298 1566 return RX_DROP_MONITOR;
f0706e82
JB		 1567}
1568
f698d856 1569static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1570 struct sk_buff *skb)
1571{
1572 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 1573 struct ieee80211_mgmt *mgmt;
1574 u16 fc;
1575
f0706e82
JB		 1576 rx_status = (struct ieee80211_rx_status *) skb->cb;
1577 mgmt = (struct ieee80211_mgmt *) skb->data;
1578 fc = le16_to_cpu(mgmt->frame_control);
1579
46900298
JB		 1580 switch (fc & IEEE80211_FCTL_STYPE) {
1581 case IEEE80211_STYPE_PROBE_RESP:
1582 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
1583 rx_status);
1584 break;
1585 case IEEE80211_STYPE_BEACON:
1586 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1587 rx_status);
1588 break;
1589 case IEEE80211_STYPE_AUTH:
1590 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
1591 break;
1592 case IEEE80211_STYPE_ASSOC_RESP:
1593 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0);
1594 break;
1595 case IEEE80211_STYPE_REASSOC_RESP:
1596 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1);
1597 break;
1598 case IEEE80211_STYPE_DEAUTH:
1599 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
1600 break;
1601 case IEEE80211_STYPE_DISASSOC:
1602 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1603 break;
f0706e82
JB		 1604 }
1605
1606 kfree_skb(skb);
1607}
1608
9c6bd790 1609static void ieee80211_sta_timer(unsigned long data)
f0706e82 1610{
60f8b39c
JB		 1611 struct ieee80211_sub_if_data *sdata =
1612 (struct ieee80211_sub_if_data *) data;
46900298 1613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1614 struct ieee80211_local *local = sdata->local;
f0706e82 1615
46900298
JB		 1616 set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1617 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1618}
1619
46900298 1620static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 1621{
46900298 1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1623 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1624
1625 if (local->ops->reset_tsf) {
1626 /* Reset own TSF to allow time synchronization work. */
1627 local->ops->reset_tsf(local_to_hw(local));
1628 }
1629
46900298 1630 ifmgd->wmm_last_param_set = -1; /* allow any WMM update */
f0706e82
JB		 1631
1632
46900298
JB		 1633 if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1634 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1635 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1636 ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY;
1637 else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1638 ifmgd->auth_alg = WLAN_AUTH_LEAP;
f0706e82 1639 else
46900298
JB		 1640 ifmgd->auth_alg = WLAN_AUTH_OPEN;
1641 ifmgd->auth_transaction = -1;
1642 ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED;
1643 ifmgd->assoc_scan_tries = 0;
1644 ifmgd->direct_probe_tries = 0;
1645 ifmgd->auth_tries = 0;
1646 ifmgd->assoc_tries = 0;
24e64622 1647 netif_tx_stop_all_queues(sdata->dev);
f698d856 1648 netif_carrier_off(sdata->dev);
f0706e82
JB		 1649}
1650
46900298 1651static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata)
f0706e82 1652{
46900298 1653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f698d856 1654 struct ieee80211_local *local = sdata->local;
c2b13452 1655 struct ieee80211_bss *bss;
46900298
JB		 1656 u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid;
1657 u8 ssid_len = ifmgd->ssid_len;
00d3f14c
JB		 1658 u16 capa_mask = WLAN_CAPABILITY_ESS;
1659 u16 capa_val = WLAN_CAPABILITY_ESS;
1660 struct ieee80211_channel *chan = local->oper_channel;
1661
46900298 1662 if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL |
00d3f14c
JB		 1663 IEEE80211_STA_AUTO_BSSID_SEL |
1664 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
1665 capa_mask |= WLAN_CAPABILITY_PRIVACY;
1666 if (sdata->default_key)
1667 capa_val |= WLAN_CAPABILITY_PRIVACY;
f0706e82 1668 }
9d139c81 1669
46900298 1670 if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
00d3f14c
JB		 1671 chan = NULL;
1672
46900298 1673 if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL)
00d3f14c
JB		 1674 bssid = NULL;
1675
46900298 1676 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) {
00d3f14c
JB		 1677 ssid = NULL;
1678 ssid_len = 0;
1679 }
1680
1681 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
1682 bssid, ssid, ssid_len,
1683 capa_mask, capa_val);
1684
1685 if (bss) {
1686 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
46900298 1687 if (!(ifmgd->flags & IEEE80211_STA_SSID_SET))
00d3f14c
JB		 1688 ieee80211_sta_set_ssid(sdata, bss->ssid,
1689 bss->ssid_len);
1690 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
1691 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
1692 bss->supp_rates);
46900298
JB		 1693 if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED)
1694 sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED;
fdfacf0a 1695 else
46900298 1696 sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 1697
9c6bd790
JB		 1698 /* Send out direct probe if no probe resp was received or
1699 * the one we have is outdated
1700 */
00d3f14c
JB		 1701 if (!bss->last_probe_resp ||
1702 time_after(jiffies, bss->last_probe_resp
9c6bd790 1703 + IEEE80211_SCAN_RESULT_EXPIRE))
46900298 1704 ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE;
9c6bd790 1705 else
46900298 1706 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 1707
00d3f14c 1708 ieee80211_rx_bss_put(local, bss);
46900298 1709 ieee80211_sta_reset_auth(sdata);
9c6bd790
JB		 1710 return 0;
1711 } else {
46900298
JB		 1712 if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
1713 ifmgd->assoc_scan_tries++;
2a519311
JB		 1714 /* XXX maybe racy? */
1715 if (local->scan_req)
1716 return -1;
1717 memcpy(local->int_scan_req.ssids[0].ssid,
46900298
JB		 1718 ifmgd->ssid, IEEE80211_MAX_SSID_LEN);
1719 if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)
2a519311 1720 local->int_scan_req.ssids[0].ssid_len = 0;
9c6bd790 1721 else
46900298 1722 local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len;
2a519311 1723 ieee80211_start_scan(sdata, &local->int_scan_req);
46900298
JB		 1724 ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE;
1725 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
e374055a 1726 } else {
46900298
JB		 1727 ifmgd->assoc_scan_tries = 0;
1728 ifmgd->state = IEEE80211_STA_MLME_DISABLED;
e374055a 1729 }
9c6bd790
JB		 1730 }
1731 return -1;
1732}
1733
1734
1735static void ieee80211_sta_work(struct work_struct *work)
1736{
1737 struct ieee80211_sub_if_data *sdata =
46900298 1738 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1739 struct ieee80211_local *local = sdata->local;
46900298 1740 struct ieee80211_if_managed *ifmgd;
9c6bd790
JB		 1741 struct sk_buff *skb;
1742
1743 if (!netif_running(sdata->dev))
1744 return;
1745
c2b13452 1746 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 1747 return;
1748
46900298 1749 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1750 return;
46900298 1751 ifmgd = &sdata->u.mgd;
f0706e82 1752
46900298 1753 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 1754 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1755
46900298
JB		 1756 if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
1757 ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1758 ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE &&
1759 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) {
2a519311 1760 ieee80211_start_scan(sdata, local->scan_req);
9c6bd790 1761 return;
f0706e82
JB		 1762 }
1763
46900298
JB		 1764 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) {
1765 if (ieee80211_sta_config_auth(sdata))
9c6bd790 1766 return;
46900298
JB		 1767 clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request);
1768 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request))
9c6bd790 1769 return;
d6f2da5b 1770
46900298 1771 switch (ifmgd->state) {
9c6bd790
JB		 1772 case IEEE80211_STA_MLME_DISABLED:
1773 break;
1774 case IEEE80211_STA_MLME_DIRECT_PROBE:
46900298 1775 ieee80211_direct_probe(sdata);
9c6bd790
JB		 1776 break;
1777 case IEEE80211_STA_MLME_AUTHENTICATE:
46900298 1778 ieee80211_authenticate(sdata);
9c6bd790
JB		 1779 break;
1780 case IEEE80211_STA_MLME_ASSOCIATE:
46900298 1781 ieee80211_associate(sdata);
9c6bd790
JB		 1782 break;
1783 case IEEE80211_STA_MLME_ASSOCIATED:
46900298 1784 ieee80211_associated(sdata);
9c6bd790
JB		 1785 break;
1786 default:
1787 WARN_ON(1);
1788 break;
1789 }
1790
46900298 1791 if (ieee80211_privacy_mismatch(sdata)) {
9c6bd790
JB		 1792 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1793 "mixed-cell disabled - disassociate\n", sdata->dev->name);
1794
46900298 1795 ieee80211_set_disassoc(sdata, false, true,
9c6bd790
JB		 1796 WLAN_REASON_UNSPECIFIED);
1797 }
f0706e82
JB		 1798}
1799
9c6bd790
JB		 1800static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1801{
05c914fe 1802 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790 1803 queue_work(sdata->local->hw.workqueue,
46900298 1804 &sdata->u.mgd.work);
9c6bd790 1805}
f0706e82 1806
9c6bd790
JB		 1807/* interface setup */
1808void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1809{
46900298 1810 struct ieee80211_if_managed *ifmgd;
988c0f72 1811
46900298
JB		 1812 ifmgd = &sdata->u.mgd;
1813 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
1814 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1815 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 1816 (unsigned long) sdata);
46900298 1817 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 1818 (unsigned long) sdata);
46900298 1819 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 1820
46900298
JB		 1821 ifmgd->capab = WLAN_CAPABILITY_ESS;
1822 ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN |
9c6bd790 1823 IEEE80211_AUTH_ALG_SHARED_KEY;
46900298 1824 ifmgd->flags |= IEEE80211_STA_CREATE_IBSS |
9c6bd790
JB		 1825 IEEE80211_STA_AUTO_BSSID_SEL |
1826 IEEE80211_STA_AUTO_CHANNEL_SEL;
1827 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
46900298 1828 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 1829}
1830
9c6bd790 1831/* configuration hooks */
46900298 1832void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata)
60f8b39c 1833{
46900298 1834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1835 struct ieee80211_local *local = sdata->local;
60f8b39c 1836
46900298 1837 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1838 return;
60f8b39c 1839
46900298 1840 if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET |
9c6bd790 1841 IEEE80211_STA_AUTO_BSSID_SEL)) &&
46900298 1842 (ifmgd->flags & (IEEE80211_STA_SSID_SET |
9c6bd790 1843 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 1844
46900298
JB		 1845 if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)
1846 ieee80211_set_disassoc(sdata, true, true,
9c6bd790 1847 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 1848
46900298
JB		 1849 set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request);
1850 queue_work(local->hw.workqueue, &ifmgd->work);
9c6bd790
JB		 1851 }
1852}
60f8b39c 1853
79f6440c
AF		 1854int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata)
1855{
1856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1857
1858 ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1859
1860 if (ifmgd->ssid_len)
1861 ifmgd->flags |= IEEE80211_STA_SSID_SET;
1862 else
1863 ifmgd->flags &= ~IEEE80211_STA_SSID_SET;
1864
1865 return 0;
1866}
1867
9c6bd790
JB		 1868int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
1869{
46900298 1870 struct ieee80211_if_managed *ifmgd;
60f8b39c 1871
9c6bd790
JB		 1872 if (len > IEEE80211_MAX_SSID_LEN)
1873 return -EINVAL;
1874
46900298 1875 ifmgd = &sdata->u.mgd;
9c6bd790 1876
46900298
JB		 1877 if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) {
1878 memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid));
1879 memcpy(ifmgd->ssid, ssid, len);
1880 ifmgd->ssid_len = len;
60f8b39c 1881 }
60f8b39c 1882
79f6440c 1883 return ieee80211_sta_commit(sdata);
9c6bd790
JB		 1884}
1885
1886int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
1887{
46900298
JB		 1888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1889 memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len);
1890 *len = ifmgd->ssid_len;
9c6bd790
JB		 1891 return 0;
1892}
1893
1894int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
1895{
46900298 1896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1897
dfe67012 1898 if (is_valid_ether_addr(bssid)) {
46900298
JB		 1899 memcpy(ifmgd->bssid, bssid, ETH_ALEN);
1900 ifmgd->flags |= IEEE80211_STA_BSSID_SET;
dfe67012 1901 } else {
46900298
JB		 1902 memset(ifmgd->bssid, 0, ETH_ALEN);
1903 ifmgd->flags &= ~IEEE80211_STA_BSSID_SET;
dfe67012
AF		 1904 }
1905
1906 if (netif_running(sdata->dev)) {
1907 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 1908 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
1909 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 1910 }
1911 }
60f8b39c 1912
79f6440c 1913 return ieee80211_sta_commit(sdata);
9c6bd790
JB		 1914}
1915
1916int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
1917{
46900298 1918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 1919
46900298 1920 kfree(ifmgd->extra_ie);
9c6bd790 1921 if (len == 0) {
46900298
JB		 1922 ifmgd->extra_ie = NULL;
1923 ifmgd->extra_ie_len = 0;
60f8b39c 1924 return 0;
60f8b39c 1925 }
46900298
JB		 1926 ifmgd->extra_ie = kmalloc(len, GFP_KERNEL);
1927 if (!ifmgd->extra_ie) {
1928 ifmgd->extra_ie_len = 0;
9c6bd790
JB		 1929 return -ENOMEM;
1930 }
46900298
JB		 1931 memcpy(ifmgd->extra_ie, ie, len);
1932 ifmgd->extra_ie_len = len;
9c6bd790 1933 return 0;
60f8b39c
JB		 1934}
1935
f698d856 1936int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 1937{
f4ea83dd 1938 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 1939 sdata->dev->name, reason);
f0706e82 1940
46900298 1941 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1942 return -EINVAL;
1943
46900298 1944 ieee80211_set_disassoc(sdata, true, true, reason);
f0706e82
JB		 1945 return 0;
1946}
1947
f698d856 1948int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 1949{
46900298 1950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1951
f4ea83dd 1952 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 1953 sdata->dev->name, reason);
f0706e82 1954
05c914fe 1955 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1956 return -EINVAL;
1957
46900298
JB		 1958 if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED))
1959 return -ENOLINK;
f0706e82 1960
46900298 1961 ieee80211_set_disassoc(sdata, false, true, reason);
f0706e82
JB		 1962 return 0;
1963}
84363e6e 1964
9c6bd790
JB		 1965/* scan finished notification */
1966void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1967{
1968 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
9c6bd790
JB		 1969
1970 /* Restart STA timers */
1971 rcu_read_lock();
1972 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1973 ieee80211_restart_sta_timer(sdata);
1974 rcu_read_unlock();
1975}
520eb820
KV		 1976
1977void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1978{
1979 struct ieee80211_local *local =
1980 container_of(work, struct ieee80211_local,
1981 dynamic_ps_disable_work);
1982
1983 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1984 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1985 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1986 }
1987
1988 ieee80211_wake_queues_by_reason(&local->hw,
1989 IEEE80211_QUEUE_STOP_REASON_PS);
1990}
1991
1992void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1993{
1994 struct ieee80211_local *local =
1995 container_of(work, struct ieee80211_local,
1996 dynamic_ps_enable_work);
a97b77b9 1997 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 1998
1999 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2000 return;
2001
4be8c387
JB		 2002 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2003 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2004
4be8c387 2005 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2006 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2007}
2008
2009void ieee80211_dynamic_ps_timer(unsigned long data)
2010{
2011 struct ieee80211_local *local = (void *) data;
2012
2013 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2014}
46900298
JB		 2015
2016void ieee80211_send_nullfunc(struct ieee80211_local *local,
2017 struct ieee80211_sub_if_data *sdata,
2018 int powersave)
2019{
2020 struct sk_buff *skb;
2021 struct ieee80211_hdr *nullfunc;
2022 __le16 fc;
2023
2024 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2025 return;
2026
2027 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2028 if (!skb) {
2029 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2030 "frame\n", sdata->dev->name);
2031 return;
2032 }
2033 skb_reserve(skb, local->hw.extra_tx_headroom);
2034
2035 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2036 memset(nullfunc, 0, 24);
2037 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2038 IEEE80211_FCTL_TODS);
2039 if (powersave)
2040 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
2041 nullfunc->frame_control = fc;
2042 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2043 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2044 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2045
2046 ieee80211_tx_skb(sdata, skb, 0);
2047}
Linux kernel - Deliverables
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