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mac80211: further cleanups to stopping BA sessions
[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
JB		 17#include <linux/if_arp.h>
18#include <linux/wireless.h>
19#include <linux/random.h>
20#include <linux/etherdevice.h>
d0709a65 21#include <linux/rtnetlink.h>
f0706e82 22#include <net/iw_handler.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82 29
6042a3e3 30#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 31#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32#define IEEE80211_AUTH_MAX_TRIES 3
33#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34#define IEEE80211_ASSOC_MAX_TRIES 3
35#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36#define IEEE80211_PROBE_INTERVAL (60 * HZ)
37#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38#define IEEE80211_SCAN_INTERVAL (2 * HZ)
39#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 40#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 41
f0706e82
JB		 42#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
44
45#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
46
47
5484e237
JB		 48/* utils */
49static int ecw2cw(int ecw)
60f8b39c 50{
5484e237 51 return (1 << ecw) - 1;
60f8b39c
JB		 52}
53
c2b13452 54static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 55{
56 u8 *end, *pos;
57
58 pos = bss->ies;
59 if (pos == NULL)
60 return NULL;
61 end = pos + bss->ies_len;
62
63 while (pos + 1 < end) {
64 if (pos + 2 + pos[1] > end)
65 break;
66 if (pos[0] == ie)
67 return pos;
68 pos += 2 + pos[1];
69 }
70
71 return NULL;
72}
73
c2b13452 74static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 75 struct ieee80211_supported_band *sband,
881d948c 76 u32 *rates)
9ac19a90
JB		 77{
78 int i, j, count;
79 *rates = 0;
80 count = 0;
81 for (i = 0; i < bss->supp_rates_len; i++) {
82 int rate = (bss->supp_rates[i] & 0x7F) * 5;
83
84 for (j = 0; j < sband->n_bitrates; j++)
85 if (sband->bitrates[j].bitrate == rate) {
86 *rates |= BIT(j);
87 count++;
88 break;
89 }
90 }
91
92 return count;
93}
94
9c6bd790 95/* also used by mesh code */
881d948c 96u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
9c6bd790
JB		 97 struct ieee802_11_elems *elems,
98 enum ieee80211_band band)
60f8b39c 99{
9c6bd790
JB		 100 struct ieee80211_supported_band *sband;
101 struct ieee80211_rate *bitrates;
102 size_t num_rates;
881d948c 103 u32 supp_rates;
9c6bd790
JB		 104 int i, j;
105 sband = local->hw.wiphy->bands[band];
60f8b39c 106
9c6bd790
JB		 107 if (!sband) {
108 WARN_ON(1);
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
60f8b39c 110 }
60f8b39c 111
9c6bd790
JB		 112 bitrates = sband->bitrates;
113 num_rates = sband->n_bitrates;
114 supp_rates = 0;
115 for (i = 0; i < elems->supp_rates_len +
116 elems->ext_supp_rates_len; i++) {
117 u8 rate = 0;
118 int own_rate;
119 if (i < elems->supp_rates_len)
120 rate = elems->supp_rates[i];
121 else if (elems->ext_supp_rates)
122 rate = elems->ext_supp_rates
123 [i - elems->supp_rates_len];
124 own_rate = 5 * (rate & 0x7f);
125 for (j = 0; j < num_rates; j++)
126 if (bitrates[j].bitrate == own_rate)
127 supp_rates |= BIT(j);
128 }
129 return supp_rates;
60f8b39c
JB		 130}
131
9c6bd790
JB		 132/* frame sending functions */
133
9aed3cc1
JM		 134static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
135{
136 if (ies)
137 memcpy(skb_put(skb, ies_len), ies, ies_len);
138}
139
9c6bd790 140/* also used by scanning code */
0a51b27e
JB		 141void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
142 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 143{
144 struct ieee80211_local *local = sdata->local;
145 struct ieee80211_supported_band *sband;
146 struct sk_buff *skb;
147 struct ieee80211_mgmt *mgmt;
148 u8 *pos, *supp_rates, *esupp_rates = NULL;
149 int i;
150
9aed3cc1
JM		 151 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
152 sdata->u.sta.ie_probereq_len);
60f8b39c
JB		 153 if (!skb) {
154 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
155 "request\n", sdata->dev->name);
156 return;
157 }
158 skb_reserve(skb, local->hw.extra_tx_headroom);
159
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
161 memset(mgmt, 0, 24);
162 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163 IEEE80211_STYPE_PROBE_REQ);
164 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
165 if (dst) {
166 memcpy(mgmt->da, dst, ETH_ALEN);
167 memcpy(mgmt->bssid, dst, ETH_ALEN);
168 } else {
169 memset(mgmt->da, 0xff, ETH_ALEN);
170 memset(mgmt->bssid, 0xff, ETH_ALEN);
171 }
172 pos = skb_put(skb, 2 + ssid_len);
173 *pos++ = WLAN_EID_SSID;
174 *pos++ = ssid_len;
175 memcpy(pos, ssid, ssid_len);
176
177 supp_rates = skb_put(skb, 2);
178 supp_rates[0] = WLAN_EID_SUPP_RATES;
179 supp_rates[1] = 0;
180 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
181
182 for (i = 0; i < sband->n_bitrates; i++) {
183 struct ieee80211_rate *rate = &sband->bitrates[i];
184 if (esupp_rates) {
185 pos = skb_put(skb, 1);
186 esupp_rates[1]++;
187 } else if (supp_rates[1] == 8) {
188 esupp_rates = skb_put(skb, 3);
189 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
190 esupp_rates[1] = 1;
191 pos = &esupp_rates[2];
192 } else {
193 pos = skb_put(skb, 1);
194 supp_rates[1]++;
195 }
196 *pos = rate->bitrate / 5;
197 }
198
9aed3cc1
JM		 199 add_extra_ies(skb, sdata->u.sta.ie_probereq,
200 sdata->u.sta.ie_probereq_len);
201
e50db65c 202 ieee80211_tx_skb(sdata, skb, 0);
60f8b39c
JB		 203}
204
9c6bd790
JB		 205static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
206 struct ieee80211_if_sta *ifsta,
207 int transaction, u8 *extra, size_t extra_len,
208 int encrypt)
209{
210 struct ieee80211_local *local = sdata->local;
211 struct sk_buff *skb;
212 struct ieee80211_mgmt *mgmt;
213
214 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
9aed3cc1
JM		 215 sizeof(*mgmt) + 6 + extra_len +
216 sdata->u.sta.ie_auth_len);
9c6bd790
JB		 217 if (!skb) {
218 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
219 "frame\n", sdata->dev->name);
220 return;
221 }
222 skb_reserve(skb, local->hw.extra_tx_headroom);
223
224 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
225 memset(mgmt, 0, 24 + 6);
226 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
227 IEEE80211_STYPE_AUTH);
228 if (encrypt)
229 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
230 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
232 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
233 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
234 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
235 ifsta->auth_transaction = transaction + 1;
236 mgmt->u.auth.status_code = cpu_to_le16(0);
237 if (extra)
238 memcpy(skb_put(skb, extra_len), extra, extra_len);
9aed3cc1 239 add_extra_ies(skb, sdata->u.sta.ie_auth, sdata->u.sta.ie_auth_len);
9c6bd790
JB		 240
241 ieee80211_tx_skb(sdata, skb, encrypt);
242}
243
9ac19a90
JB		 244static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
245 struct ieee80211_if_sta *ifsta)
246{
247 struct ieee80211_local *local = sdata->local;
248 struct sk_buff *skb;
249 struct ieee80211_mgmt *mgmt;
9aed3cc1 250 u8 *pos, *ies, *ht_ie, *e_ies;
9ac19a90
JB		 251 int i, len, count, rates_len, supp_rates_len;
252 u16 capab;
c2b13452 253 struct ieee80211_bss *bss;
9ac19a90
JB		 254 int wmm = 0;
255 struct ieee80211_supported_band *sband;
881d948c 256 u32 rates = 0;
9aed3cc1
JM		 257 size_t e_ies_len;
258
259 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
260 e_ies = sdata->u.sta.ie_reassocreq;
261 e_ies_len = sdata->u.sta.ie_reassocreq_len;
262 } else {
263 e_ies = sdata->u.sta.ie_assocreq;
264 e_ies_len = sdata->u.sta.ie_assocreq_len;
265 }
9ac19a90
JB		 266
267 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
268 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
9aed3cc1 269 ifsta->ssid_len + e_ies_len);
9ac19a90
JB		 270 if (!skb) {
271 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
272 "frame\n", sdata->dev->name);
273 return;
274 }
275 skb_reserve(skb, local->hw.extra_tx_headroom);
276
277 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
278
279 capab = ifsta->capab;
280
281 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
282 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
283 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
284 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
285 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
286 }
287
288 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
289 local->hw.conf.channel->center_freq,
290 ifsta->ssid, ifsta->ssid_len);
291 if (bss) {
292 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
293 capab |= WLAN_CAPABILITY_PRIVACY;
294 if (bss->wmm_used)
295 wmm = 1;
296
297 /* get all rates supported by the device and the AP as
298 * some APs don't like getting a superset of their rates
299 * in the association request (e.g. D-Link DAP 1353 in
300 * b-only mode) */
301 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
302
303 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
304 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
305 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
306
307 ieee80211_rx_bss_put(local, bss);
308 } else {
309 rates = ~0;
310 rates_len = sband->n_bitrates;
311 }
312
313 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
314 memset(mgmt, 0, 24);
315 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
316 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
317 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
318
319 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
320 skb_put(skb, 10);
321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_REASSOC_REQ);
323 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
324 mgmt->u.reassoc_req.listen_interval =
325 cpu_to_le16(local->hw.conf.listen_interval);
326 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
327 ETH_ALEN);
328 } else {
329 skb_put(skb, 4);
330 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
331 IEEE80211_STYPE_ASSOC_REQ);
332 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 333 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 334 cpu_to_le16(local->hw.conf.listen_interval);
335 }
336
337 /* SSID */
338 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
339 *pos++ = WLAN_EID_SSID;
340 *pos++ = ifsta->ssid_len;
341 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
342
343 /* add all rates which were marked to be used above */
344 supp_rates_len = rates_len;
345 if (supp_rates_len > 8)
346 supp_rates_len = 8;
347
348 len = sband->n_bitrates;
349 pos = skb_put(skb, supp_rates_len + 2);
350 *pos++ = WLAN_EID_SUPP_RATES;
351 *pos++ = supp_rates_len;
352
353 count = 0;
354 for (i = 0; i < sband->n_bitrates; i++) {
355 if (BIT(i) & rates) {
356 int rate = sband->bitrates[i].bitrate;
357 *pos++ = (u8) (rate / 5);
358 if (++count == 8)
359 break;
360 }
361 }
362
363 if (rates_len > count) {
364 pos = skb_put(skb, rates_len - count + 2);
365 *pos++ = WLAN_EID_EXT_SUPP_RATES;
366 *pos++ = rates_len - count;
367
368 for (i++; i < sband->n_bitrates; i++) {
369 if (BIT(i) & rates) {
370 int rate = sband->bitrates[i].bitrate;
371 *pos++ = (u8) (rate / 5);
372 }
373 }
374 }
375
376 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
377 /* 1. power capabilities */
378 pos = skb_put(skb, 4);
379 *pos++ = WLAN_EID_PWR_CAPABILITY;
380 *pos++ = 2;
381 *pos++ = 0; /* min tx power */
382 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
383
384 /* 2. supported channels */
385 /* TODO: get this in reg domain format */
386 pos = skb_put(skb, 2 * sband->n_channels + 2);
387 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
388 *pos++ = 2 * sband->n_channels;
389 for (i = 0; i < sband->n_channels; i++) {
390 *pos++ = ieee80211_frequency_to_channel(
391 sband->channels[i].center_freq);
392 *pos++ = 1; /* one channel in the subband*/
393 }
394 }
395
396 if (ifsta->extra_ie) {
397 pos = skb_put(skb, ifsta->extra_ie_len);
398 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
399 }
400
401 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
402 pos = skb_put(skb, 9);
403 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
404 *pos++ = 7; /* len */
405 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
406 *pos++ = 0x50;
407 *pos++ = 0xf2;
408 *pos++ = 2; /* WME */
409 *pos++ = 0; /* WME info */
410 *pos++ = 1; /* WME ver */
411 *pos++ = 0;
412 }
413
414 /* wmm support is a must to HT */
eb46936b
VT		 415 /*
416 * IEEE802.11n does not allow TKIP/WEP as pairwise
417 * ciphers in HT mode. We still associate in non-ht
418 * mode (11a/b/g) if any one of these ciphers is
419 * configured as pairwise.
420 */
9ac19a90 421 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB		 422 sband->ht_cap.ht_supported &&
423 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
eb46936b
VT		 424 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
425 (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
d9fe60de
JB		 426 struct ieee80211_ht_info *ht_info =
427 (struct ieee80211_ht_info *)(ht_ie + 2);
428 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 429 __le16 tmp;
430 u32 flags = local->hw.conf.channel->flags;
431
d9fe60de
JB		 432 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
433 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
9ac19a90 434 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
d9fe60de 435 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 436 cap &= ~IEEE80211_HT_CAP_SGI_40;
437 }
438 break;
d9fe60de 439 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
9ac19a90 440 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
d9fe60de 441 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 442 cap &= ~IEEE80211_HT_CAP_SGI_40;
443 }
444 break;
445 }
446
447 tmp = cpu_to_le16(cap);
448 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
449 *pos++ = WLAN_EID_HT_CAPABILITY;
450 *pos++ = sizeof(struct ieee80211_ht_cap);
451 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
452 memcpy(pos, &tmp, sizeof(u16));
453 pos += sizeof(u16);
454 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 455 *pos++ = sband->ht_cap.ampdu_factor |
456 (sband->ht_cap.ampdu_density << 2);
457 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 458 }
459
9aed3cc1
JM		 460 add_extra_ies(skb, e_ies, e_ies_len);
461
9ac19a90
JB		 462 kfree(ifsta->assocreq_ies);
463 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
464 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
465 if (ifsta->assocreq_ies)
466 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
467
e50db65c 468 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 469}
470
471
ef422bc0
JB		 472static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
473 u16 stype, u16 reason)
9ac19a90
JB		 474{
475 struct ieee80211_local *local = sdata->local;
ef422bc0 476 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
9ac19a90
JB		 477 struct sk_buff *skb;
478 struct ieee80211_mgmt *mgmt;
9aed3cc1
JM		 479 u8 *ies;
480 size_t ies_len;
9ac19a90 481
9aed3cc1
JM		 482 if (stype == IEEE80211_STYPE_DEAUTH) {
483 ies = sdata->u.sta.ie_deauth;
484 ies_len = sdata->u.sta.ie_deauth_len;
485 } else {
486 ies = sdata->u.sta.ie_disassoc;
487 ies_len = sdata->u.sta.ie_disassoc_len;
488 }
489
490 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
491 ies_len);
9ac19a90 492 if (!skb) {
ef422bc0
JB		 493 printk(KERN_DEBUG "%s: failed to allocate buffer for "
494 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 495 return;
496 }
497 skb_reserve(skb, local->hw.extra_tx_headroom);
498
499 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
500 memset(mgmt, 0, 24);
501 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
502 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
503 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
ef422bc0 504 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 505 skb_put(skb, 2);
ef422bc0 506 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 507 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
508
9aed3cc1
JM		 509 add_extra_ies(skb, ies, ies_len);
510
5394af4d 511 ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 512}
513
572e0012
KV		 514void ieee80211_send_pspoll(struct ieee80211_local *local,
515 struct ieee80211_sub_if_data *sdata)
516{
517 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
518 struct ieee80211_pspoll *pspoll;
519 struct sk_buff *skb;
520 u16 fc;
521
522 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
523 if (!skb) {
524 printk(KERN_DEBUG "%s: failed to allocate buffer for "
525 "pspoll frame\n", sdata->dev->name);
526 return;
527 }
528 skb_reserve(skb, local->hw.extra_tx_headroom);
529
530 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
531 memset(pspoll, 0, sizeof(*pspoll));
532 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
533 pspoll->frame_control = cpu_to_le16(fc);
534 pspoll->aid = cpu_to_le16(ifsta->aid);
535
536 /* aid in PS-Poll has its two MSBs each set to 1 */
537 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
538
539 memcpy(pspoll->bssid, ifsta->bssid, ETH_ALEN);
540 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
541
542 ieee80211_tx_skb(sdata, skb, 0);
543
544 return;
545}
546
60f8b39c 547/* MLME */
f698d856 548static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
c2b13452 549 struct ieee80211_bss *bss)
e2839d8f 550{
e2839d8f
VK		 551 struct ieee80211_local *local = sdata->local;
552 int i, have_higher_than_11mbit = 0;
553
e2839d8f
VK		 554 /* cf. IEEE 802.11 9.2.12 */
555 for (i = 0; i < bss->supp_rates_len; i++)
556 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
557 have_higher_than_11mbit = 1;
558
559 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
560 have_higher_than_11mbit)
561 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
562 else
563 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
564
3d35f7c6 565 ieee80211_set_wmm_default(sdata);
e2839d8f
VK		 566}
567
f698d856 568static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 569 struct ieee80211_if_sta *ifsta,
570 u8 *wmm_param, size_t wmm_param_len)
571{
f0706e82
JB		 572 struct ieee80211_tx_queue_params params;
573 size_t left;
574 int count;
575 u8 *pos;
576
3434fbd3
JB		 577 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
578 return;
579
580 if (!wmm_param)
581 return;
582
f0706e82
JB		 583 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
584 return;
585 count = wmm_param[6] & 0x0f;
586 if (count == ifsta->wmm_last_param_set)
587 return;
588 ifsta->wmm_last_param_set = count;
589
590 pos = wmm_param + 8;
591 left = wmm_param_len - 8;
592
593 memset(&params, 0, sizeof(params));
594
595 if (!local->ops->conf_tx)
596 return;
597
598 local->wmm_acm = 0;
599 for (; left >= 4; left -= 4, pos += 4) {
600 int aci = (pos[0] >> 5) & 0x03;
601 int acm = (pos[0] >> 4) & 0x01;
602 int queue;
603
604 switch (aci) {
605 case 1:
e100bb64 606 queue = 3;
988c0f72 607 if (acm)
f0706e82 608 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 609 break;
610 case 2:
e100bb64 611 queue = 1;
988c0f72 612 if (acm)
f0706e82 613 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 614 break;
615 case 3:
e100bb64 616 queue = 0;
988c0f72 617 if (acm)
f0706e82 618 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 619 break;
620 case 0:
621 default:
e100bb64 622 queue = 2;
988c0f72 623 if (acm)
f0706e82 624 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 625 break;
626 }
627
628 params.aifs = pos[0] & 0x0f;
629 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
630 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 631 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 632#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 633 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 634 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 635 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 636 params.cw_max, params.txop);
637#endif
f0706e82
JB		 638 /* TODO: handle ACM (block TX, fallback to next lowest allowed
639 * AC for now) */
640 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
641 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 642 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 643 }
644 }
645}
646
1fb3606b 647static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
a97b77b9
VN		 648{
649 u8 mask;
650 u8 index, indexn1, indexn2;
651 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
652
653 aid &= 0x3fff;
654 index = aid / 8;
655 mask = 1 << (aid & 7);
656
a97b77b9
VN		 657 indexn1 = tim->bitmap_ctrl & 0xfe;
658 indexn2 = elems->tim_len + indexn1 - 4;
659
660 if (index < indexn1 || index > indexn2)
661 return false;
662
663 index -= indexn1;
664
665 return !!(tim->virtual_map[index] & mask);
666}
667
7a5158ef
JB		 668static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
669 u16 capab, bool erp_valid, u8 erp)
5628221c 670{
bda3933a 671 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 672#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 673 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ebd74487 674#endif
471b3efd 675 u32 changed = 0;
7a5158ef
JB		 676 bool use_protection;
677 bool use_short_preamble;
678 bool use_short_slot;
679
680 if (erp_valid) {
681 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
682 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
683 } else {
684 use_protection = false;
685 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
686 }
687
688 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 689
471b3efd 690 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 691#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 692 if (net_ratelimit()) {
0c68ae26 693 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 694 sdata->dev->name,
5628221c 695 use_protection ? "enabled" : "disabled",
0c68ae26 696 ifsta->bssid);
5628221c 697 }
f4ea83dd 698#endif
471b3efd
JB		 699 bss_conf->use_cts_prot = use_protection;
700 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 701 }
7e9ed188 702
d43c7b37 703 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 704#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 705 if (net_ratelimit()) {
706 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 707 " (BSSID=%pM)\n",
471b3efd 708 sdata->dev->name,
d43c7b37 709 use_short_preamble ? "short" : "long",
0c68ae26 710 ifsta->bssid);
7e9ed188 711 }
f4ea83dd 712#endif
d43c7b37 713 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 714 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 715 }
d9430a32 716
7a5158ef
JB		 717 if (use_short_slot != bss_conf->use_short_slot) {
718#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
719 if (net_ratelimit()) {
391429c1
CL		 720 printk(KERN_DEBUG "%s: switched to %s slot time"
721 " (BSSID=%pM)\n",
7a5158ef
JB		 722 sdata->dev->name,
723 use_short_slot ? "short" : "long",
724 ifsta->bssid);
725 }
726#endif
727 bss_conf->use_short_slot = use_short_slot;
728 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 729 }
730
731 return changed;
732}
733
f5e5bf25
TW		 734static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
735 struct ieee80211_if_sta *ifsta)
736{
737 union iwreq_data wrqu;
738 memset(&wrqu, 0, sizeof(wrqu));
739 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
740 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
741 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
742 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
743}
744
f698d856 745static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 746 struct ieee80211_if_sta *ifsta)
747{
74af0250
LT		 748 char *buf;
749 size_t len;
750 int i;
f0706e82
JB		 751 union iwreq_data wrqu;
752
74af0250
LT		 753 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
754 return;
755
756 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
757 ifsta->assocresp_ies_len), GFP_KERNEL);
758 if (!buf)
759 return;
760
761 len = sprintf(buf, "ASSOCINFO(");
f0706e82 762 if (ifsta->assocreq_ies) {
74af0250
LT		 763 len += sprintf(buf + len, "ReqIEs=");
764 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
765 len += sprintf(buf + len, "%02x",
766 ifsta->assocreq_ies[i]);
767 }
f0706e82 768 }
087d833e 769 if (ifsta->assocresp_ies) {
74af0250
LT		 770 if (ifsta->assocreq_ies)
771 len += sprintf(buf + len, " ");
772 len += sprintf(buf + len, "RespIEs=");
773 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
774 len += sprintf(buf + len, "%02x",
775 ifsta->assocresp_ies[i]);
776 }
f0706e82 777 }
74af0250
LT		 778 len += sprintf(buf + len, ")");
779
780 if (len > IW_CUSTOM_MAX) {
781 len = sprintf(buf, "ASSOCRESPIE=");
782 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
783 len += sprintf(buf + len, "%02x",
784 ifsta->assocresp_ies[i]);
785 }
786 }
787
ad788b5e
JL		 788 if (len <= IW_CUSTOM_MAX) {
789 memset(&wrqu, 0, sizeof(wrqu));
790 wrqu.data.length = len;
791 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
792 }
74af0250
LT		 793
794 kfree(buf);
f0706e82
JB		 795}
796
797
f698d856 798static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026
JB		 799 struct ieee80211_if_sta *ifsta,
800 u32 bss_info_changed)
f0706e82 801{
471b3efd 802 struct ieee80211_local *local = sdata->local;
38668c05 803 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 804
c2b13452 805 struct ieee80211_bss *bss;
d6f2da5b 806
ae5eb026 807 bss_info_changed |= BSS_CHANGED_ASSOC;
f5e5bf25 808 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 809
05c914fe 810 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f5e5bf25 811 return;
21c0cbe7 812
f5e5bf25
TW		 813 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
814 conf->channel->center_freq,
815 ifsta->ssid, ifsta->ssid_len);
816 if (bss) {
817 /* set timing information */
bda3933a
JB		 818 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
819 sdata->vif.bss_conf.timestamp = bss->timestamp;
820 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 821
ae5eb026 822 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
7a5158ef 823 bss->capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 824
825 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 826 }
827
9ac19a90
JB		 828 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
829 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
830 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 831
9ac19a90
JB		 832 ifsta->last_probe = jiffies;
833 ieee80211_led_assoc(local, 1);
9306102e 834
bda3933a 835 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 836 /*
837 * For now just always ask the driver to update the basic rateset
838 * when we have associated, we aren't checking whether it actually
839 * changed or not.
840 */
ae5eb026
JB		 841 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
842 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 843
4be8c387
JB		 844 if (local->powersave) {
845 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
846 local->hw.conf.dynamic_ps_timeout > 0) {
520eb820 847 mod_timer(&local->dynamic_ps_timer, jiffies +
46f2c4bd
JB		 848 msecs_to_jiffies(
849 local->hw.conf.dynamic_ps_timeout));
4be8c387
JB		 850 } else {
851 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
852 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 853 conf->flags |= IEEE80211_CONF_PS;
4be8c387 854 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
520eb820 855 }
e0cb686f
KV		 856 }
857
9ac19a90
JB		 858 netif_tx_start_all_queues(sdata->dev);
859 netif_carrier_on(sdata->dev);
f0706e82 860
9ac19a90 861 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 862}
863
9ac19a90
JB		 864static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
865 struct ieee80211_if_sta *ifsta)
f0706e82 866{
9ac19a90
JB		 867 ifsta->direct_probe_tries++;
868 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB		 869 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
870 sdata->dev->name, ifsta->bssid);
9ac19a90 871 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 872 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 873
874 /*
875 * Most likely AP is not in the range so remove the
876 * bss information associated to the AP
877 */
878 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
879 sdata->local->hw.conf.channel->center_freq,
880 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 881 return;
882 }
f0706e82 883
0c68ae26
JB		 884 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
885 sdata->dev->name, ifsta->bssid,
9ac19a90 886 ifsta->direct_probe_tries);
f0706e82 887
9ac19a90 888 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 889
9ac19a90
JB		 890 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
891
892 /* Direct probe is sent to broadcast address as some APs
893 * will not answer to direct packet in unassociated state.
894 */
895 ieee80211_send_probe_req(sdata, NULL,
896 ifsta->ssid, ifsta->ssid_len);
897
898 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 899}
f0706e82 900
9ac19a90
JB		 901
902static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
903 struct ieee80211_if_sta *ifsta)
f0706e82 904{
9ac19a90
JB		 905 ifsta->auth_tries++;
906 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 907 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 908 " timed out\n",
0c68ae26 909 sdata->dev->name, ifsta->bssid);
9ac19a90 910 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 911 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 912 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
913 sdata->local->hw.conf.channel->center_freq,
914 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 915 return;
916 }
f0706e82 917
9ac19a90 918 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB		 919 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
920 sdata->dev->name, ifsta->bssid);
f0706e82 921
9ac19a90
JB		 922 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
923
924 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 925}
926
5925d976
VN		 927/*
928 * The disassoc 'reason' argument can be either our own reason
929 * if self disconnected or a reason code from the AP.
930 */
aa458d17
TW		 931static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
932 struct ieee80211_if_sta *ifsta, bool deauth,
933 bool self_disconnected, u16 reason)
934{
935 struct ieee80211_local *local = sdata->local;
936 struct sta_info *sta;
e0cb686f 937 u32 changed = 0, config_changed = 0;
aa458d17
TW		 938
939 rcu_read_lock();
940
941 sta = sta_info_get(local, ifsta->bssid);
942 if (!sta) {
943 rcu_read_unlock();
944 return;
945 }
946
947 if (deauth) {
948 ifsta->direct_probe_tries = 0;
949 ifsta->auth_tries = 0;
950 }
951 ifsta->assoc_scan_tries = 0;
952 ifsta->assoc_tries = 0;
953
24e64622 954 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 955 netif_carrier_off(sdata->dev);
956
2dace10e 957 ieee80211_sta_tear_down_BA_sessions(sta);
aa458d17
TW		 958
959 if (self_disconnected) {
960 if (deauth)
ef422bc0
JB		 961 ieee80211_send_deauth_disassoc(sdata,
962 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 963 else
ef422bc0
JB		 964 ieee80211_send_deauth_disassoc(sdata,
965 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 966 }
967
f5e5bf25
TW		 968 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
969 changed |= ieee80211_reset_erp_info(sdata);
970
f5e5bf25 971 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 972 changed |= BSS_CHANGED_ASSOC;
973 sdata->vif.bss_conf.assoc = false;
f5e5bf25
TW		 974
975 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17 976
7a947080 977 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
aa458d17 978 ifsta->state = IEEE80211_STA_MLME_DISABLED;
7a947080
VT		 979 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
980 sdata->local->hw.conf.channel->center_freq,
981 ifsta->ssid, ifsta->ssid_len);
982 }
aa458d17 983
aa458d17
TW		 984 rcu_read_unlock();
985
4797938c 986 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 987 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 988
a8302de9
VT		 989 local->power_constr_level = 0;
990
520eb820
KV		 991 del_timer_sync(&local->dynamic_ps_timer);
992 cancel_work_sync(&local->dynamic_ps_enable_work);
993
e0cb686f
KV		 994 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
995 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
996 config_changed |= IEEE80211_CONF_CHANGE_PS;
997 }
ae5eb026 998
e0cb686f 999 ieee80211_hw_config(local, config_changed);
ae5eb026 1000 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1001
1002 rcu_read_lock();
1003
1004 sta = sta_info_get(local, ifsta->bssid);
1005 if (!sta) {
1006 rcu_read_unlock();
1007 return;
1008 }
1009
1010 sta_info_unlink(&sta);
1011
1012 rcu_read_unlock();
1013
1014 sta_info_destroy(sta);
aa458d17 1015}
f0706e82 1016
9ac19a90
JB		 1017static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1018{
1019 if (!sdata || !sdata->default_key ||
1020 sdata->default_key->conf.alg != ALG_WEP)
1021 return 0;
1022 return 1;
1023}
1024
f698d856 1025static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1026 struct ieee80211_if_sta *ifsta)
1027{
f698d856 1028 struct ieee80211_local *local = sdata->local;
c2b13452 1029 struct ieee80211_bss *bss;
5b98b1f7
JB		 1030 int bss_privacy;
1031 int wep_privacy;
1032 int privacy_invoked;
f0706e82 1033
5b98b1f7 1034 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 1035 return 0;
1036
f698d856 1037 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 1038 local->hw.conf.channel->center_freq,
cffdd30d 1039 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1040 if (!bss)
1041 return 0;
1042
5b98b1f7 1043 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1044 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1045 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1046
3e122be0 1047 ieee80211_rx_bss_put(local, bss);
f0706e82 1048
5b98b1f7
JB		 1049 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1050 return 0;
1051
1052 return 1;
f0706e82
JB		 1053}
1054
f698d856 1055static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1056 struct ieee80211_if_sta *ifsta)
1057{
1058 ifsta->assoc_tries++;
1059 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1060 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1061 " timed out\n",
0c68ae26 1062 sdata->dev->name, ifsta->bssid);
48c2fc59 1063 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 1064 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 1065 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
1066 sdata->local->hw.conf.channel->center_freq,
1067 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1068 return;
1069 }
1070
48c2fc59 1071 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB		 1072 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1073 sdata->dev->name, ifsta->bssid);
f698d856 1074 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1075 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1076 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1077 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1078 return;
1079 }
1080
f698d856 1081 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1082
1083 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1084}
1085
1086
f698d856 1087static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1088 struct ieee80211_if_sta *ifsta)
1089{
f698d856 1090 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1091 struct sta_info *sta;
1092 int disassoc;
1093
1094 /* TODO: start monitoring current AP signal quality and number of
1095 * missed beacons. Scan other channels every now and then and search
1096 * for better APs. */
1097 /* TODO: remove expired BSSes */
1098
48c2fc59 1099 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1100
d0709a65
JB		 1101 rcu_read_lock();
1102
f0706e82
JB		 1103 sta = sta_info_get(local, ifsta->bssid);
1104 if (!sta) {
0c68ae26
JB		 1105 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1106 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 1107 disassoc = 1;
1108 } else {
1109 disassoc = 0;
1110 if (time_after(jiffies,
1111 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1112 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1113 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 1114 "current AP %pM - assume out of "
f0706e82 1115 "range\n",
0c68ae26 1116 sdata->dev->name, ifsta->bssid);
f0706e82 1117 disassoc = 1;
d6f2da5b 1118 } else
f698d856 1119 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 1120 ifsta->ssid,
1121 ifsta->ssid_len);
d6f2da5b 1122 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1123 } else {
d6f2da5b 1124 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1125 if (time_after(jiffies, ifsta->last_probe +
1126 IEEE80211_PROBE_INTERVAL)) {
1127 ifsta->last_probe = jiffies;
f698d856 1128 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1129 ifsta->ssid,
1130 ifsta->ssid_len);
1131 }
1132 }
f0706e82 1133 }
d0709a65
JB		 1134
1135 rcu_read_unlock();
1136
7a947080 1137 if (disassoc)
60f8b39c
JB		 1138 ieee80211_set_disassoc(sdata, ifsta, true, true,
1139 WLAN_REASON_PREV_AUTH_NOT_VALID);
7a947080 1140 else
60f8b39c
JB		 1141 mod_timer(&ifsta->timer, jiffies +
1142 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1143}
1144
1145
f698d856 1146static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1147 struct ieee80211_if_sta *ifsta)
1148{
f698d856 1149 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1150 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1151 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1152}
1153
1154
f698d856 1155static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1156 struct ieee80211_if_sta *ifsta,
1157 struct ieee80211_mgmt *mgmt,
1158 size_t len)
1159{
1160 u8 *pos;
1161 struct ieee802_11_elems elems;
1162
f0706e82 1163 pos = mgmt->u.auth.variable;
67a4cce4 1164 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1165 if (!elems.challenge)
f0706e82 1166 return;
f698d856 1167 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1168 elems.challenge_len + 2, 1);
1169}
1170
f698d856 1171static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1172 struct ieee80211_if_sta *ifsta,
1173 struct ieee80211_mgmt *mgmt,
1174 size_t len)
1175{
f0706e82
JB		 1176 u16 auth_alg, auth_transaction, status_code;
1177
48c2fc59 1178 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1179 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1180 return;
f0706e82 1181
f4ea83dd 1182 if (len < 24 + 6)
f0706e82 1183 return;
f0706e82 1184
05c914fe 1185 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1186 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1187 return;
f0706e82 1188
05c914fe 1189 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1190 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1191 return;
f0706e82
JB		 1192
1193 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1194 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1195 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1196
05c914fe 1197 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1198 /*
1199 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1200 * networks and most implementations do not seem to use it.
1201 * However, try to reply to authentication attempts if someone
1202 * has actually implemented this.
135a2110 1203 */
f4ea83dd 1204 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1205 return;
f698d856 1206 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1207 }
1208
1209 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1210 auth_transaction != ifsta->auth_transaction)
f0706e82 1211 return;
f0706e82
JB		 1212
1213 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1214 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1215 u8 algs[3];
1216 const int num_algs = ARRAY_SIZE(algs);
1217 int i, pos;
1218 algs[0] = algs[1] = algs[2] = 0xff;
1219 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1220 algs[0] = WLAN_AUTH_OPEN;
1221 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1222 algs[1] = WLAN_AUTH_SHARED_KEY;
1223 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1224 algs[2] = WLAN_AUTH_LEAP;
1225 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1226 pos = 0;
1227 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1228 pos = 1;
1229 else
1230 pos = 2;
1231 for (i = 0; i < num_algs; i++) {
1232 pos++;
1233 if (pos >= num_algs)
1234 pos = 0;
1235 if (algs[pos] == ifsta->auth_alg ||
1236 algs[pos] == 0xff)
1237 continue;
1238 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1239 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1240 continue;
1241 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1242 break;
1243 }
1244 }
1245 return;
1246 }
1247
1248 switch (ifsta->auth_alg) {
1249 case WLAN_AUTH_OPEN:
1250 case WLAN_AUTH_LEAP:
f698d856 1251 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1252 break;
1253 case WLAN_AUTH_SHARED_KEY:
1254 if (ifsta->auth_transaction == 4)
f698d856 1255 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1256 else
f698d856 1257 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1258 break;
1259 }
1260}
1261
1262
f698d856 1263static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1264 struct ieee80211_if_sta *ifsta,
1265 struct ieee80211_mgmt *mgmt,
1266 size_t len)
1267{
1268 u16 reason_code;
1269
f4ea83dd 1270 if (len < 24 + 2)
f0706e82 1271 return;
f0706e82 1272
f4ea83dd 1273 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1274 return;
f0706e82
JB		 1275
1276 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1277
988c0f72 1278 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1279 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1280 sdata->dev->name, reason_code);
f0706e82 1281
48c2fc59
TW		 1282 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1283 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1284 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1285 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1286 mod_timer(&ifsta->timer, jiffies +
1287 IEEE80211_RETRY_AUTH_INTERVAL);
1288 }
1289
aa458d17 1290 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1291 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1292}
1293
1294
f698d856 1295static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1296 struct ieee80211_if_sta *ifsta,
1297 struct ieee80211_mgmt *mgmt,
1298 size_t len)
1299{
1300 u16 reason_code;
1301
f4ea83dd 1302 if (len < 24 + 2)
f0706e82 1303 return;
f0706e82 1304
f4ea83dd 1305 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1306 return;
f0706e82
JB		 1307
1308 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1309
d6f2da5b 1310 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1311 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1312 sdata->dev->name, reason_code);
f0706e82 1313
48c2fc59
TW		 1314 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1315 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1316 mod_timer(&ifsta->timer, jiffies +
1317 IEEE80211_RETRY_AUTH_INTERVAL);
1318 }
1319
5925d976 1320 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB		 1321}
1322
1323
471b3efd 1324static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1325 struct ieee80211_if_sta *ifsta,
1326 struct ieee80211_mgmt *mgmt,
1327 size_t len,
1328 int reassoc)
1329{
471b3efd 1330 struct ieee80211_local *local = sdata->local;
8318d78a 1331 struct ieee80211_supported_band *sband;
f0706e82 1332 struct sta_info *sta;
881d948c 1333 u32 rates, basic_rates;
f0706e82
JB		 1334 u16 capab_info, status_code, aid;
1335 struct ieee802_11_elems elems;
bda3933a 1336 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1337 u8 *pos;
ae5eb026 1338 u32 changed = 0;
f0706e82 1339 int i, j;
ddf4ac53 1340 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1341 u16 ap_ht_cap_flags;
f0706e82
JB		 1342
1343 /* AssocResp and ReassocResp have identical structure, so process both
1344 * of them in this function. */
1345
48c2fc59 1346 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1347 return;
f0706e82 1348
f4ea83dd 1349 if (len < 24 + 6)
f0706e82 1350 return;
f0706e82 1351
f4ea83dd 1352 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1353 return;
f0706e82
JB		 1354
1355 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1356 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1357 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1358
0c68ae26 1359 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1360 "status=%d aid=%d)\n",
0c68ae26 1361 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1362 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1363
63a5ab82
JM		 1364 pos = mgmt->u.assoc_resp.variable;
1365 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1366
1367 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1368 elems.timeout_int && elems.timeout_int_len == 5 &&
1369 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1370 u32 tu, ms;
f797eb7e 1371 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1372 ms = tu * 1024 / 1000;
1373 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1374 "comeback duration %u TU (%u ms)\n",
1375 sdata->dev->name, tu, ms);
1376 if (ms > IEEE80211_ASSOC_TIMEOUT)
1377 mod_timer(&ifsta->timer,
1378 jiffies + msecs_to_jiffies(ms));
1379 return;
1380 }
1381
f0706e82
JB		 1382 if (status_code != WLAN_STATUS_SUCCESS) {
1383 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1384 sdata->dev->name, status_code);
8a69aa93
DD		 1385 /* if this was a reassociation, ensure we try a "full"
1386 * association next time. This works around some broken APs
1387 * which do not correctly reject reassociation requests. */
d6f2da5b 1388 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1389 return;
1390 }
1391
1dd84aa2
JB		 1392 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1393 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1394 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1395 aid &= ~(BIT(15) | BIT(14));
1396
f0706e82
JB		 1397 if (!elems.supp_rates) {
1398 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1399 sdata->dev->name);
f0706e82
JB		 1400 return;
1401 }
1402
f698d856 1403 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1404 ifsta->aid = aid;
1405 ifsta->ap_capab = capab_info;
1406
1407 kfree(ifsta->assocresp_ies);
1408 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1409 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1410 if (ifsta->assocresp_ies)
1411 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1412
d0709a65
JB		 1413 rcu_read_lock();
1414
f0706e82
JB		 1415 /* Add STA entry for the AP */
1416 sta = sta_info_get(local, ifsta->bssid);
1417 if (!sta) {
c2b13452 1418 struct ieee80211_bss *bss;
ddf4ac53
JB		 1419
1420 newsta = true;
d0709a65 1421
73651ee6
JB		 1422 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1423 if (!sta) {
1424 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1425 " the AP\n", sdata->dev->name);
d0709a65 1426 rcu_read_unlock();
f0706e82
JB		 1427 return;
1428 }
60f8b39c
JB		 1429 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1430 local->hw.conf.channel->center_freq,
1431 ifsta->ssid, ifsta->ssid_len);
1432 if (bss) {
1433 sta->last_signal = bss->signal;
1434 sta->last_qual = bss->qual;
1435 sta->last_noise = bss->noise;
1436 ieee80211_rx_bss_put(local, bss);
1437 }
f709fc69 1438
60f8b39c
JB		 1439 /* update new sta with its last rx activity */
1440 sta->last_rx = jiffies;
f709fc69 1441 }
f709fc69 1442
60f8b39c
JB		 1443 /*
1444 * FIXME: Do we really need to update the sta_info's information here?
1445 * We already know about the AP (we found it in our list) so it
1446 * should already be filled with the right info, no?
1447 * As is stands, all this is racy because typically we assume
1448 * the information that is filled in here (except flags) doesn't
1449 * change while a STA structure is alive. As such, it should move
1450 * to between the sta_info_alloc() and sta_info_insert() above.
1451 */
f709fc69 1452
60f8b39c
JB		 1453 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1454 WLAN_STA_AUTHORIZED);
05e5e883 1455
60f8b39c
JB		 1456 rates = 0;
1457 basic_rates = 0;
1458 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1459
60f8b39c
JB		 1460 for (i = 0; i < elems.supp_rates_len; i++) {
1461 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1462 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1463
60f8b39c
JB		 1464 if (rate > 110)
1465 have_higher_than_11mbit = true;
1466
1467 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1468 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1469 rates |= BIT(j);
d61272cb
TW		 1470 if (is_basic)
1471 basic_rates |= BIT(j);
1472 break;
1473 }
f709fc69 1474 }
f709fc69
LCC		 1475 }
1476
60f8b39c
JB		 1477 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1478 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1479 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1480
60f8b39c
JB		 1481 if (rate > 110)
1482 have_higher_than_11mbit = true;
f0706e82 1483
60f8b39c 1484 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1485 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1486 rates |= BIT(j);
d61272cb
TW		 1487 if (is_basic)
1488 basic_rates |= BIT(j);
1489 break;
1490 }
60f8b39c 1491 }
1ebebea8 1492 }
f0706e82 1493
323ce79a 1494 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1495 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1496
1497 /* cf. IEEE 802.11 9.2.12 */
1498 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1499 have_higher_than_11mbit)
1500 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1501 else
1502 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1503
ae5eb026
JB		 1504 if (elems.ht_cap_elem)
1505 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1506 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1507
1508 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1509
4b7679a5 1510 rate_control_rate_init(sta);
f0706e82 1511
5394af4d
JM		 1512 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1513 set_sta_flags(sta, WLAN_STA_MFP);
1514
ddf4ac53 1515 if (elems.wmm_param)
60f8b39c 1516 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1517
1518 if (newsta) {
1519 int err = sta_info_insert(sta);
1520 if (err) {
1521 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1522 " the AP (error %d)\n", sdata->dev->name, err);
1523 rcu_read_unlock();
1524 return;
1525 }
1526 }
1527
1528 rcu_read_unlock();
1529
1530 if (elems.wmm_param)
60f8b39c
JB		 1531 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1532 elems.wmm_param_len);
f0706e82 1533
ae5eb026
JB		 1534 if (elems.ht_info_elem && elems.wmm_param &&
1535 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1536 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1537 ap_ht_cap_flags);
1538
60f8b39c
JB		 1539 /* set AID and assoc capability,
1540 * ieee80211_set_associated() will tell the driver */
1541 bss_conf->aid = aid;
1542 bss_conf->assoc_capability = capab_info;
ae5eb026 1543 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1544
60f8b39c 1545 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1546}
1547
1548
f698d856 1549static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1550 struct ieee80211_if_sta *ifsta,
c2b13452 1551 struct ieee80211_bss *bss)
a607268a 1552{
f698d856 1553 struct ieee80211_local *local = sdata->local;
c4e3a584 1554 int res = 0, rates, i, j;
a607268a
BR		 1555 struct sk_buff *skb;
1556 struct ieee80211_mgmt *mgmt;
a607268a 1557 u8 *pos;
a607268a 1558 struct ieee80211_supported_band *sband;
507b06d0 1559 union iwreq_data wrqu;
a607268a 1560
c4e3a584
AF		 1561 if (local->ops->reset_tsf) {
1562 /* Reset own TSF to allow time synchronization work. */
1563 local->ops->reset_tsf(local_to_hw(local));
1564 }
1565
1566 if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
1567 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) == 0)
1568 return res;
1569
9aed3cc1
JM		 1570 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1571 sdata->u.sta.ie_proberesp_len);
e2ef12d3
RR		 1572 if (!skb) {
1573 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1574 "response\n", sdata->dev->name);
1575 return -ENOMEM;
1576 }
1577
a607268a
BR		 1578 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1579
c4e3a584
AF		 1580 if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
1581 /* Remove possible STA entries from other IBSS networks. */
1582 sta_info_flush_delayed(sdata);
a607268a 1583 }
c4e3a584 1584
a607268a 1585 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1586 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1587 if (res)
1588 return res;
1589
1590 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1591
a607268a
BR		 1592 sdata->drop_unencrypted = bss->capability &
1593 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1594
f698d856 1595 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1596
be038b37
AK		 1597 if (res)
1598 return res;
a607268a 1599
9d139c81 1600 /* Build IBSS probe response */
a607268a 1601
e2ef12d3 1602 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1603
e2ef12d3
RR		 1604 mgmt = (struct ieee80211_mgmt *)
1605 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1606 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1607 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1608 IEEE80211_STYPE_PROBE_RESP);
1609 memset(mgmt->da, 0xff, ETH_ALEN);
1610 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1611 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1612 mgmt->u.beacon.beacon_int =
1613 cpu_to_le16(local->hw.conf.beacon_int);
1614 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1615 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
a607268a 1616
e2ef12d3
RR		 1617 pos = skb_put(skb, 2 + ifsta->ssid_len);
1618 *pos++ = WLAN_EID_SSID;
1619 *pos++ = ifsta->ssid_len;
1620 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1621
e2ef12d3
RR		 1622 rates = bss->supp_rates_len;
1623 if (rates > 8)
1624 rates = 8;
1625 pos = skb_put(skb, 2 + rates);
1626 *pos++ = WLAN_EID_SUPP_RATES;
1627 *pos++ = rates;
1628 memcpy(pos, bss->supp_rates, rates);
1629
1630 if (bss->band == IEEE80211_BAND_2GHZ) {
1631 pos = skb_put(skb, 2 + 1);
1632 *pos++ = WLAN_EID_DS_PARAMS;
1633 *pos++ = 1;
1634 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1635 }
a607268a 1636
e2ef12d3
RR		 1637 pos = skb_put(skb, 2 + 2);
1638 *pos++ = WLAN_EID_IBSS_PARAMS;
1639 *pos++ = 2;
1640 /* FIX: set ATIM window based on scan results */
1641 *pos++ = 0;
1642 *pos++ = 0;
e039fa4a 1643
e2ef12d3
RR		 1644 if (bss->supp_rates_len > 8) {
1645 rates = bss->supp_rates_len - 8;
1646 pos = skb_put(skb, 2 + rates);
1647 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1648 *pos++ = rates;
1649 memcpy(pos, &bss->supp_rates[8], rates);
9d139c81 1650 }
a607268a 1651
9aed3cc1
JM		 1652 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1653 sdata->u.sta.ie_proberesp_len);
1654
e2ef12d3
RR		 1655 ifsta->probe_resp = skb;
1656
078e1e60
JB		 1657 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1658 IEEE80211_IFCC_BEACON_ENABLED);
e2ef12d3
RR		 1659
1660
9d139c81
JB		 1661 rates = 0;
1662 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1663 for (i = 0; i < bss->supp_rates_len; i++) {
1664 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1665 for (j = 0; j < sband->n_bitrates; j++)
1666 if (sband->bitrates[j].bitrate == bitrate)
1667 rates |= BIT(j);
a607268a 1668 }
9d139c81
JB		 1669 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1670
b079ada7 1671 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1672
dfe67012 1673 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
48c2fc59 1674 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1675 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1676
4492bea6
EG		 1677 ieee80211_led_assoc(local, true);
1678
507b06d0
DW		 1679 memset(&wrqu, 0, sizeof(wrqu));
1680 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1681 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1682
1683 return res;
1684}
1685
98c8fccf
JB		 1686static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1687 struct ieee80211_mgmt *mgmt,
1688 size_t len,
1689 struct ieee80211_rx_status *rx_status,
1690 struct ieee802_11_elems *elems,
1691 bool beacon)
1692{
1693 struct ieee80211_local *local = sdata->local;
1694 int freq;
c2b13452 1695 struct ieee80211_bss *bss;
98c8fccf
JB		 1696 struct sta_info *sta;
1697 struct ieee80211_channel *channel;
1698 u64 beacon_timestamp, rx_timestamp;
881d948c 1699 u32 supp_rates = 0;
98c8fccf 1700 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 1701
1702 if (elems->ds_params && elems->ds_params_len == 1)
1703 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1704 else
1705 freq = rx_status->freq;
1706
1707 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1708
1709 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1710 return;
1711
05c914fe 1712 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1713 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1714 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1715
1716 rcu_read_lock();
1717
1718 sta = sta_info_get(local, mgmt->sa);
1719 if (sta) {
881d948c 1720 u32 prev_rates;
98c8fccf 1721
323ce79a 1722 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1723 /* make sure mandatory rates are always added */
323ce79a 1724 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1725 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1726
1727#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1728 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1729 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1730 "for %pM based on beacon info (0x%llx | "
98c8fccf 1731 "0x%llx -> 0x%llx)\n",
17741cdc 1732 sdata->dev->name,
0c68ae26 1733 sta->sta.addr,
98c8fccf
JB		 1734 (unsigned long long) prev_rates,
1735 (unsigned long long) supp_rates,
323ce79a 1736 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1737#endif
1738 } else {
ab1f5c0b 1739 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB		 1740 }
1741
1742 rcu_read_unlock();
1743 }
1744
1745 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1746 freq, beacon);
1747 if (!bss)
1748 return;
1749
c481ec97
S		 1750 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1751 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1752 struct ieee80211_channel_sw_ie *sw_elem =
1753 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1754 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1755 }
1756
98c8fccf
JB		 1757 /* was just updated in ieee80211_bss_info_update */
1758 beacon_timestamp = bss->timestamp;
1759
30b89b0f
JB		 1760 /*
1761 * In STA mode, the remaining parameters should not be overridden
1762 * by beacons because they're not necessarily accurate there.
1763 */
05c914fe 1764 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1765 bss->last_probe_resp && beacon) {
3e122be0 1766 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1767 return;
1768 }
1769
9d9bf77d 1770 /* check if we need to merge IBSS */
05c914fe 1771 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
65f0e6a3 1772 (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
fba4a1e6 1773 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1774 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1775 elems->ssid_len == sdata->u.sta.ssid_len &&
1776 memcmp(elems->ssid, sdata->u.sta.ssid,
1777 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1778 if (rx_status->flag & RX_FLAG_TSFT) {
1779 /* in order for correct IBSS merging we need mactime
1780 *
1781 * since mactime is defined as the time the first data
1782 * symbol of the frame hits the PHY, and the timestamp
1783 * of the beacon is defined as "the time that the data
1784 * symbol containing the first bit of the timestamp is
1785 * transmitted to the PHY plus the transmitting STA’s
1786 * delays through its local PHY from the MAC-PHY
1787 * interface to its interface with the WM"
1788 * (802.11 11.1.2) - equals the time this bit arrives at
1789 * the receiver - we have to take into account the
1790 * offset between the two.
1791 * e.g: at 1 MBit that means mactime is 192 usec earlier
1792 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1793 */
0fb8ca45
JM		 1794 int rate;
1795 if (rx_status->flag & RX_FLAG_HT) {
1796 rate = 65; /* TODO: HT rates */
1797 } else {
1798 rate = local->hw.wiphy->bands[band]->
9d9bf77d 1799 bitrates[rx_status->rate_idx].bitrate;
0fb8ca45 1800 }
9d9bf77d
BR		 1801 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1802 } else if (local && local->ops && local->ops->get_tsf)
1803 /* second best option: get current TSF */
1804 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1805 else
1806 /* can't merge without knowing the TSF */
1807 rx_timestamp = -1LLU;
1808#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1809 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1810 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1811 mgmt->sa, mgmt->bssid,
9d9bf77d
BR		 1812 (unsigned long long)rx_timestamp,
1813 (unsigned long long)beacon_timestamp,
1814 (unsigned long long)(rx_timestamp - beacon_timestamp),
1815 jiffies);
1816#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1817 if (beacon_timestamp > rx_timestamp) {
576fdeae 1818#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd 1819 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB		 1820 "local TSF - IBSS merge with BSSID %pM\n",
1821 sdata->dev->name, mgmt->bssid);
fba4a1e6 1822#endif
f698d856 1823 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
ab1f5c0b 1824 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR		 1825 }
1826 }
1827
3e122be0 1828 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1829}
1830
1831
f698d856 1832static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1833 struct ieee80211_mgmt *mgmt,
1834 size_t len,
1835 struct ieee80211_rx_status *rx_status)
1836{
ae6a44e3
EK		 1837 size_t baselen;
1838 struct ieee802_11_elems elems;
9859b81e 1839 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1840
8e7cdbb6
TW		 1841 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1842 return; /* ignore ProbeResp to foreign address */
1843
ae6a44e3
EK		 1844 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1845 if (baselen > len)
1846 return;
1847
1848 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1849 &elems);
1850
98c8fccf 1851 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1852
1853 /* direct probe may be part of the association flow */
1854 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1855 &ifsta->request)) {
1856 printk(KERN_DEBUG "%s direct probe responded\n",
1857 sdata->dev->name);
1858 ieee80211_authenticate(sdata, ifsta);
1859 }
f0706e82
JB		 1860}
1861
1862
f698d856 1863static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1864 struct ieee80211_mgmt *mgmt,
1865 size_t len,
1866 struct ieee80211_rx_status *rx_status)
1867{
f0706e82 1868 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1869 size_t baselen;
1870 struct ieee802_11_elems elems;
f698d856 1871 struct ieee80211_local *local = sdata->local;
471b3efd 1872 u32 changed = 0;
1fb3606b 1873 bool erp_valid, directed_tim;
7a5158ef 1874 u8 erp_value = 0;
f0706e82 1875
ae6a44e3
EK		 1876 /* Process beacon from the current BSS */
1877 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1878 if (baselen > len)
1879 return;
1880
1881 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1882
98c8fccf 1883 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1884
05c914fe 1885 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1886 return;
1887 ifsta = &sdata->u.sta;
1888
d6f2da5b 1889 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1890 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1891 return;
1892
c481ec97
S		 1893 if (rx_status->freq != local->hw.conf.channel->center_freq)
1894 return;
1895
fe3fa827
JB		 1896 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1897 elems.wmm_param_len);
1898
4be8c387
JB		 1899 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1900 local->hw.conf.flags & IEEE80211_CONF_PS) {
1fb3606b 1901 directed_tim = ieee80211_check_tim(&elems, ifsta->aid);
a97b77b9 1902
1fb3606b 1903 if (directed_tim) {
572e0012
KV		 1904 if (local->hw.conf.dynamic_ps_timeout > 0) {
1905 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1906 ieee80211_hw_config(local,
1907 IEEE80211_CONF_CHANGE_PS);
1908 ieee80211_send_nullfunc(local, sdata, 0);
1909 } else {
1910 local->pspolling = true;
1911
1912 /*
1913 * Here is assumed that the driver will be
1914 * able to send ps-poll frame and receive a
1915 * response even though power save mode is
1916 * enabled, but some drivers might require
1917 * to disable power save here. This needs
1918 * to be investigated.
1919 */
1920 ieee80211_send_pspoll(local, sdata);
1921 }
a97b77b9
VN		 1922 }
1923 }
7a5158ef
JB		 1924
1925 if (elems.erp_info && elems.erp_info_len >= 1) {
1926 erp_valid = true;
1927 erp_value = elems.erp_info[0];
1928 } else {
1929 erp_valid = false;
50c4afb9 1930 }
7a5158ef
JB		 1931 changed |= ieee80211_handle_bss_capability(sdata,
1932 le16_to_cpu(mgmt->u.beacon.capab_info),
1933 erp_valid, erp_value);
f0706e82 1934
d3c990fb 1935
ae5eb026
JB		 1936 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1937 struct sta_info *sta;
1938 struct ieee80211_supported_band *sband;
1939 u16 ap_ht_cap_flags;
1940
1941 rcu_read_lock();
1942
1943 sta = sta_info_get(local, ifsta->bssid);
1944 if (!sta) {
1945 rcu_read_unlock();
1946 return;
1947 }
1948
1949 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1950
1951 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1952 elems.ht_cap_elem, &sta->sta.ht_cap);
1953
1954 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1955
1956 rcu_read_unlock();
1957
1958 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1959 ap_ht_cap_flags);
d3c990fb
RR		 1960 }
1961
3f2355cb
LR		 1962 if (elems.country_elem) {
1963 /* Note we are only reviewing this on beacons
1964 * for the BSSID we are associated to */
1965 regulatory_hint_11d(local->hw.wiphy,
1966 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1967
1968 /* TODO: IBSS also needs this */
1969 if (elems.pwr_constr_elem)
1970 ieee80211_handle_pwr_constr(sdata,
1971 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1972 elems.pwr_constr_elem,
1973 elems.pwr_constr_elem_len);
3f2355cb
LR		 1974 }
1975
471b3efd 1976 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1977}
1978
1979
f698d856 1980static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1981 struct ieee80211_if_sta *ifsta,
1982 struct ieee80211_mgmt *mgmt,
504a71e4 1983 size_t len)
f0706e82 1984{
f698d856 1985 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1986 int tx_last_beacon;
1987 struct sk_buff *skb;
1988 struct ieee80211_mgmt *resp;
1989 u8 *pos, *end;
1990
05c914fe 1991 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1992 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1993 len < 24 + 2 || !ifsta->probe_resp)
1994 return;
1995
1996 if (local->ops->tx_last_beacon)
1997 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1998 else
1999 tx_last_beacon = 1;
2000
2001#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 2002 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
2003 " (tx_last_beacon=%d)\n",
2004 sdata->dev->name, mgmt->sa, mgmt->da,
2005 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 2006#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2007
2008 if (!tx_last_beacon)
2009 return;
2010
2011 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2012 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2013 return;
2014
2015 end = ((u8 *) mgmt) + len;
2016 pos = mgmt->u.probe_req.variable;
2017 if (pos[0] != WLAN_EID_SSID ||
2018 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2019#ifdef CONFIG_MAC80211_IBSS_DEBUG
2020 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 2021 "from %pM\n",
2022 sdata->dev->name, mgmt->sa);
f4ea83dd 2023#endif
f0706e82
JB		 2024 return;
2025 }
2026 if (pos[1] != 0 &&
2027 (pos[1] != ifsta->ssid_len ||
2028 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2029 /* Ignore ProbeReq for foreign SSID */
2030 return;
2031 }
2032
2033 /* Reply with ProbeResp */
0ec0b7ac 2034 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2035 if (!skb)
2036 return;
2037
2038 resp = (struct ieee80211_mgmt *) skb->data;
2039 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2040#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 2041 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
2042 sdata->dev->name, resp->da);
f0706e82 2043#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 2044 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 2045}
2046
f698d856 2047void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2048 struct ieee80211_rx_status *rx_status)
2049{
f698d856 2050 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2051 struct ieee80211_if_sta *ifsta;
2052 struct ieee80211_mgmt *mgmt;
2053 u16 fc;
2054
2055 if (skb->len < 24)
2056 goto fail;
2057
f0706e82
JB		 2058 ifsta = &sdata->u.sta;
2059
2060 mgmt = (struct ieee80211_mgmt *) skb->data;
2061 fc = le16_to_cpu(mgmt->frame_control);
2062
2063 switch (fc & IEEE80211_FCTL_STYPE) {
2064 case IEEE80211_STYPE_PROBE_REQ:
2065 case IEEE80211_STYPE_PROBE_RESP:
2066 case IEEE80211_STYPE_BEACON:
2067 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2068 case IEEE80211_STYPE_AUTH:
2069 case IEEE80211_STYPE_ASSOC_RESP:
2070 case IEEE80211_STYPE_REASSOC_RESP:
2071 case IEEE80211_STYPE_DEAUTH:
2072 case IEEE80211_STYPE_DISASSOC:
2073 skb_queue_tail(&ifsta->skb_queue, skb);
2074 queue_work(local->hw.workqueue, &ifsta->work);
2075 return;
f0706e82
JB		 2076 }
2077
2078 fail:
2079 kfree_skb(skb);
2080}
2081
f698d856 2082static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2083 struct sk_buff *skb)
2084{
2085 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2086 struct ieee80211_if_sta *ifsta;
2087 struct ieee80211_mgmt *mgmt;
2088 u16 fc;
2089
f0706e82
JB		 2090 ifsta = &sdata->u.sta;
2091
2092 rx_status = (struct ieee80211_rx_status *) skb->cb;
2093 mgmt = (struct ieee80211_mgmt *) skb->data;
2094 fc = le16_to_cpu(mgmt->frame_control);
2095
2096 switch (fc & IEEE80211_FCTL_STYPE) {
2097 case IEEE80211_STYPE_PROBE_REQ:
504a71e4 2098 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2099 break;
2100 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2101 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2102 break;
2103 case IEEE80211_STYPE_BEACON:
f698d856 2104 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2105 break;
2106 case IEEE80211_STYPE_AUTH:
f698d856 2107 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2108 break;
2109 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2110 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2111 break;
2112 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2113 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2114 break;
2115 case IEEE80211_STYPE_DEAUTH:
f698d856 2116 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2117 break;
2118 case IEEE80211_STYPE_DISASSOC:
f698d856 2119 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2120 break;
2121 }
2122
2123 kfree_skb(skb);
2124}
2125
2126
f698d856 2127static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2128{
f698d856 2129 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2130 int active = 0;
2131 struct sta_info *sta;
2132
d0709a65
JB		 2133 rcu_read_lock();
2134
2135 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2136 if (sta->sdata == sdata &&
f0706e82
JB		 2137 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2138 jiffies)) {
2139 active++;
2140 break;
2141 }
2142 }
d0709a65
JB		 2143
2144 rcu_read_unlock();
f0706e82
JB		 2145
2146 return active;
2147}
2148
2149
f698d856 2150static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2151 struct ieee80211_if_sta *ifsta)
2152{
2153 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2154
f698d856
JBG		 2155 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2156 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2157 return;
2158
137f9f46
AF		 2159 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2160 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2161 return;
2162
f0706e82 2163 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 2164 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 2165 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 2166}
2167
2168
9c6bd790 2169static void ieee80211_sta_timer(unsigned long data)
f0706e82 2170{
60f8b39c
JB		 2171 struct ieee80211_sub_if_data *sdata =
2172 (struct ieee80211_sub_if_data *) data;
2173 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2174 struct ieee80211_local *local = sdata->local;
f0706e82 2175
60f8b39c
JB		 2176 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2177 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2178}
2179
f698d856 2180static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2181 struct ieee80211_if_sta *ifsta)
2182{
f698d856 2183 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2184
2185 if (local->ops->reset_tsf) {
2186 /* Reset own TSF to allow time synchronization work. */
2187 local->ops->reset_tsf(local_to_hw(local));
2188 }
2189
2190 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2191
2192
2193 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2194 ifsta->auth_alg = WLAN_AUTH_OPEN;
2195 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2196 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2197 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2198 ifsta->auth_alg = WLAN_AUTH_LEAP;
2199 else
2200 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2201 ifsta->auth_transaction = -1;
d6f2da5b 2202 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2203 ifsta->assoc_scan_tries = 0;
9859b81e 2204 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2205 ifsta->auth_tries = 0;
2206 ifsta->assoc_tries = 0;
24e64622 2207 netif_tx_stop_all_queues(sdata->dev);
f698d856 2208 netif_carrier_off(sdata->dev);
f0706e82
JB		 2209}
2210
2211
f0706e82
JB		 2212static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2213 const char *ssid, int ssid_len)
2214{
2215 int tmp, hidden_ssid;
2216
48225709
MW		 2217 if (ssid_len == ifsta->ssid_len &&
2218 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2219 return 1;
2220
d6f2da5b 2221 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2222 return 0;
2223
2224 hidden_ssid = 1;
2225 tmp = ssid_len;
2226 while (tmp--) {
2227 if (ssid[tmp] != '\0') {
2228 hidden_ssid = 0;
2229 break;
2230 }
2231 }
2232
cb3da8cc 2233 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
f0706e82
JB		 2234 return 1;
2235
2236 if (ssid_len == 1 && ssid[0] == ' ')
2237 return 1;
2238
2239 return 0;
2240}
2241
f698d856 2242static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2243 struct ieee80211_if_sta *ifsta)
2244{
f698d856 2245 struct ieee80211_local *local = sdata->local;
c2b13452 2246 struct ieee80211_bss *bss;
8318d78a 2247 struct ieee80211_supported_band *sband;
f0706e82
JB		 2248 u8 bssid[ETH_ALEN], *pos;
2249 int i;
167ad6f7 2250 int ret;
f0706e82 2251
dfe67012
AF		 2252 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2253 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2254 } else {
2255 /* Generate random, not broadcast, locally administered BSSID. Mix in
2256 * own MAC address to make sure that devices that do not have proper
2257 * random number generator get different BSSID. */
2258 get_random_bytes(bssid, ETH_ALEN);
2259 for (i = 0; i < ETH_ALEN; i++)
2260 bssid[i] ^= sdata->dev->dev_addr[i];
2261 bssid[0] &= ~0x01;
2262 bssid[0] |= 0x02;
2263 }
f0706e82 2264
0c68ae26
JB		 2265 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2266 sdata->dev->name, bssid);
f0706e82 2267
98c8fccf 2268 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2269 local->hw.conf.channel->center_freq,
cffdd30d 2270 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2271 if (!bss)
2272 return -ENOMEM;
2273
8318d78a
JB		 2274 bss->band = local->hw.conf.channel->band;
2275 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2276
2277 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2278 local->hw.conf.beacon_int = 100;
f0706e82 2279 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2280 bss->last_update = jiffies;
2281 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2282
2283 if (sdata->default_key)
f0706e82 2284 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2285 else
f0706e82 2286 sdata->drop_unencrypted = 0;
988c0f72 2287
8318d78a 2288 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2289 pos = bss->supp_rates;
8318d78a
JB		 2290 for (i = 0; i < sband->n_bitrates; i++) {
2291 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2292 *pos++ = (u8) (rate / 5);
2293 }
2294
f698d856 2295 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2296 ieee80211_rx_bss_put(local, bss);
167ad6f7 2297 return ret;
f0706e82
JB		 2298}
2299
2300
f698d856 2301static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2302 struct ieee80211_if_sta *ifsta)
2303{
f698d856 2304 struct ieee80211_local *local = sdata->local;
c2b13452 2305 struct ieee80211_bss *bss;
f0706e82
JB		 2306 int found = 0;
2307 u8 bssid[ETH_ALEN];
2308 int active_ibss;
2309
2310 if (ifsta->ssid_len == 0)
2311 return -EINVAL;
2312
f698d856 2313 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2314#ifdef CONFIG_MAC80211_IBSS_DEBUG
2315 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2316 sdata->dev->name, active_ibss);
f0706e82 2317#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2318 spin_lock_bh(&local->bss_lock);
2319 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2320 if (ifsta->ssid_len != bss->ssid_len ||
2321 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2322 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2323 continue;
dfe67012
AF		 2324 if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
2325 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
2326 continue;
f0706e82 2327#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2328 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB		 2329#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2330 memcpy(bssid, bss->bssid, ETH_ALEN);
2331 found = 1;
2332 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2333 break;
2334 }
c2b13452 2335 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2336
2337#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2338 if (found)
0c68ae26
JB		 2339 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2340 "%pM\n", bssid, ifsta->bssid);
f0706e82 2341#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb 2342
dfe67012
AF		 2343 if (found &&
2344 ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2345 memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
167ad6f7 2346 int ret;
80693ceb
DD		 2347 int search_freq;
2348
2349 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2350 search_freq = bss->freq;
2351 else
2352 search_freq = local->hw.conf.channel->center_freq;
2353
f698d856 2354 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2355 ifsta->ssid, ifsta->ssid_len);
2356 if (!bss)
2357 goto dont_join;
2358
0c68ae26 2359 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2360 " based on configured SSID\n",
0c68ae26 2361 sdata->dev->name, bssid);
f698d856 2362 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2363 ieee80211_rx_bss_put(local, bss);
167ad6f7 2364 return ret;
f0706e82 2365 }
80693ceb
DD		 2366
2367dont_join:
f0706e82
JB		 2368#ifdef CONFIG_MAC80211_IBSS_DEBUG
2369 printk(KERN_DEBUG " did not try to join ibss\n");
2370#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2371
2372 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2373 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2374 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2375 mod_timer(&ifsta->timer, jiffies +
2376 IEEE80211_IBSS_MERGE_INTERVAL);
2377 } else if (time_after(jiffies, local->last_scan_completed +
2378 IEEE80211_SCAN_INTERVAL)) {
2379 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2380 "join\n", sdata->dev->name);
c2b13452 2381 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2382 ifsta->ssid_len);
48c2fc59 2383 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2384 int interval = IEEE80211_SCAN_INTERVAL;
2385
2386 if (time_after(jiffies, ifsta->ibss_join_req +
2387 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2388 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2389 (!(local->oper_channel->flags &
2390 IEEE80211_CHAN_NO_IBSS)))
f698d856 2391 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2392 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2393 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2394 " %d MHz\n", sdata->dev->name,
8318d78a 2395 local->hw.conf.channel->center_freq);
f0706e82
JB		 2396 }
2397
2398 /* No IBSS found - decrease scan interval and continue
2399 * scanning. */
2400 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2401 }
2402
48c2fc59 2403 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2404 mod_timer(&ifsta->timer, jiffies + interval);
2405 return 0;
2406 }
2407
2408 return 0;
2409}
2410
2411
9c6bd790
JB		 2412static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2413 struct ieee80211_if_sta *ifsta)
f0706e82 2414{
9c6bd790 2415 struct ieee80211_local *local = sdata->local;
c2b13452 2416 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2417 int top_rssi = 0, freq;
f0706e82 2418
c2b13452 2419 spin_lock_bh(&local->bss_lock);
9c6bd790 2420 freq = local->oper_channel->center_freq;
c2b13452 2421 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2422 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2423 continue;
f0706e82 2424
9c6bd790
JB		 2425 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2426 IEEE80211_STA_AUTO_BSSID_SEL |
2427 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2428 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2429 !!sdata->default_key))
2430 continue;
f0706e82 2431
9c6bd790
JB		 2432 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2433 bss->freq != freq)
2434 continue;
9d139c81 2435
9c6bd790
JB		 2436 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2437 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2438 continue;
f0706e82 2439
9c6bd790
JB		 2440 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2441 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2442 continue;
9d139c81 2443
9c6bd790
JB		 2444 if (!selected || top_rssi < bss->signal) {
2445 selected = bss;
2446 top_rssi = bss->signal;
2447 }
f0706e82 2448 }
9c6bd790
JB		 2449 if (selected)
2450 atomic_inc(&selected->users);
c2b13452 2451 spin_unlock_bh(&local->bss_lock);
9d139c81 2452
9c6bd790
JB		 2453 if (selected) {
2454 ieee80211_set_freq(sdata, selected->freq);
2455 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2456 ieee80211_sta_set_ssid(sdata, selected->ssid,
2457 selected->ssid_len);
2458 ieee80211_sta_set_bssid(sdata, selected->bssid);
2459 ieee80211_sta_def_wmm_params(sdata, selected);
fdfacf0a
JM		 2460 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2461 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2462 else
2463 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2464
9c6bd790
JB		 2465 /* Send out direct probe if no probe resp was received or
2466 * the one we have is outdated
2467 */
2468 if (!selected->last_probe_resp ||
2469 time_after(jiffies, selected->last_probe_resp
2470 + IEEE80211_SCAN_RESULT_EXPIRE))
2471 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2472 else
2473 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2474
9c6bd790
JB		 2475 ieee80211_rx_bss_put(local, selected);
2476 ieee80211_sta_reset_auth(sdata, ifsta);
2477 return 0;
2478 } else {
2479 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2480 ifsta->assoc_scan_tries++;
2481 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2482 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2483 else
c2b13452 2484 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2485 ifsta->ssid_len);
2486 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2487 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
e374055a
S		 2488 } else {
2489 ifsta->assoc_scan_tries = 0;
9c6bd790 2490 ifsta->state = IEEE80211_STA_MLME_DISABLED;
e374055a 2491 }
9c6bd790
JB		 2492 }
2493 return -1;
2494}
2495
2496
2497static void ieee80211_sta_work(struct work_struct *work)
2498{
2499 struct ieee80211_sub_if_data *sdata =
2500 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2501 struct ieee80211_local *local = sdata->local;
2502 struct ieee80211_if_sta *ifsta;
2503 struct sk_buff *skb;
2504
2505 if (!netif_running(sdata->dev))
2506 return;
2507
c2b13452 2508 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2509 return;
2510
05c914fe
JB		 2511 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2512 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2513 return;
f0706e82
JB		 2514 ifsta = &sdata->u.sta;
2515
9c6bd790
JB		 2516 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2517 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2518
2519 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2520 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2521 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2522 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2523 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2524 ifsta->scan_ssid_len);
9c6bd790 2525 return;
f0706e82
JB		 2526 }
2527
9c6bd790
JB		 2528 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2529 if (ieee80211_sta_config_auth(sdata, ifsta))
2530 return;
2531 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2532 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2533 return;
d6f2da5b 2534
9c6bd790
JB		 2535 switch (ifsta->state) {
2536 case IEEE80211_STA_MLME_DISABLED:
2537 break;
2538 case IEEE80211_STA_MLME_DIRECT_PROBE:
2539 ieee80211_direct_probe(sdata, ifsta);
2540 break;
2541 case IEEE80211_STA_MLME_AUTHENTICATE:
2542 ieee80211_authenticate(sdata, ifsta);
2543 break;
2544 case IEEE80211_STA_MLME_ASSOCIATE:
2545 ieee80211_associate(sdata, ifsta);
2546 break;
2547 case IEEE80211_STA_MLME_ASSOCIATED:
2548 ieee80211_associated(sdata, ifsta);
2549 break;
2550 case IEEE80211_STA_MLME_IBSS_SEARCH:
2551 ieee80211_sta_find_ibss(sdata, ifsta);
2552 break;
2553 case IEEE80211_STA_MLME_IBSS_JOINED:
2554 ieee80211_sta_merge_ibss(sdata, ifsta);
2555 break;
2556 default:
2557 WARN_ON(1);
2558 break;
2559 }
2560
2561 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2562 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2563 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2564
2565 ieee80211_set_disassoc(sdata, ifsta, false, true,
2566 WLAN_REASON_UNSPECIFIED);
2567 }
f0706e82
JB		 2568}
2569
9c6bd790
JB		 2570static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2571{
05c914fe 2572 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2573 queue_work(sdata->local->hw.workqueue,
2574 &sdata->u.sta.work);
2575}
f0706e82 2576
9c6bd790
JB		 2577/* interface setup */
2578void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2579{
9c6bd790 2580 struct ieee80211_if_sta *ifsta;
988c0f72 2581
9c6bd790
JB		 2582 ifsta = &sdata->u.sta;
2583 INIT_WORK(&ifsta->work, ieee80211_sta_work);
c481ec97 2584 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
9c6bd790 2585 setup_timer(&ifsta->timer, ieee80211_sta_timer,
c481ec97
S		 2586 (unsigned long) sdata);
2587 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790
JB		 2588 (unsigned long) sdata);
2589 skb_queue_head_init(&ifsta->skb_queue);
2590
2591 ifsta->capab = WLAN_CAPABILITY_ESS;
2592 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2593 IEEE80211_AUTH_ALG_SHARED_KEY;
2594 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2595 IEEE80211_STA_AUTO_BSSID_SEL |
2596 IEEE80211_STA_AUTO_CHANNEL_SEL;
2597 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2598 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2599}
2600
9c6bd790
JB		 2601/*
2602 * Add a new IBSS station, will also be called by the RX code when,
2603 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2604 * must be callable in atomic context.
2605 */
f698d856 2606struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
881d948c 2607 u8 *bssid,u8 *addr, u32 supp_rates)
f0706e82 2608{
f698d856 2609 struct ieee80211_local *local = sdata->local;
f0706e82 2610 struct sta_info *sta;
87291c02 2611 int band = local->hw.conf.channel->band;
f0706e82
JB		 2612
2613 /* TODO: Could consider removing the least recently used entry and
2614 * allow new one to be added. */
2615 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2616 if (net_ratelimit()) {
2617 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2618 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2619 }
2620 return NULL;
2621 }
2622
1e188637 2623 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2624 return NULL;
2625
f4ea83dd 2626#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2627 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2628 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2629#endif
f0706e82 2630
73651ee6
JB		 2631 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2632 if (!sta)
f0706e82
JB		 2633 return NULL;
2634
07346f81 2635 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2636
8e1535d5 2637 /* make sure mandatory rates are always added */
323ce79a 2638 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2639 ieee80211_mandatory_rates(local, band);
f0706e82 2640
4b7679a5 2641 rate_control_rate_init(sta);
f0706e82 2642
93e5deb1 2643 if (sta_info_insert(sta))
73651ee6 2644 return NULL;
73651ee6 2645
d0709a65 2646 return sta;
f0706e82
JB		 2647}
2648
9c6bd790
JB		 2649/* configuration hooks */
2650void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2651 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2652{
2653 struct ieee80211_local *local = sdata->local;
60f8b39c 2654
05c914fe 2655 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2656 return;
60f8b39c 2657
9c6bd790
JB		 2658 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2659 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2660 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2661 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2662
9c6bd790
JB		 2663 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2664 ieee80211_set_disassoc(sdata, ifsta, true, true,
2665 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2666
9c6bd790
JB		 2667 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2668 queue_work(local->hw.workqueue, &ifsta->work);
2669 }
2670}
60f8b39c 2671
9c6bd790
JB		 2672int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2673{
2674 struct ieee80211_if_sta *ifsta;
60f8b39c 2675
9c6bd790
JB		 2676 if (len > IEEE80211_MAX_SSID_LEN)
2677 return -EINVAL;
2678
2679 ifsta = &sdata->u.sta;
2680
2681 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2682 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2683 memcpy(ifsta->ssid, ssid, len);
2684 ifsta->ssid_len = len;
60f8b39c 2685 }
60f8b39c 2686
dfe67012
AF		 2687 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2688
9c6bd790
JB		 2689 if (len)
2690 ifsta->flags |= IEEE80211_STA_SSID_SET;
2691 else
2692 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2693
dfe67012 2694 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2695 ifsta->ibss_join_req = jiffies;
2696 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2697 return ieee80211_sta_find_ibss(sdata, ifsta);
2698 }
2699
2700 return 0;
2701}
2702
2703int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2704{
2705 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2706 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2707 *len = ifsta->ssid_len;
2708 return 0;
2709}
2710
2711int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2712{
2713 struct ieee80211_if_sta *ifsta;
9c6bd790
JB		 2714
2715 ifsta = &sdata->u.sta;
2716
dfe67012
AF		 2717 if (is_valid_ether_addr(bssid)) {
2718 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2719 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2720 } else {
2721 memset(ifsta->bssid, 0, ETH_ALEN);
2722 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2723 }
2724
2725 if (netif_running(sdata->dev)) {
2726 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 2727 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2728 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 2729 }
2730 }
60f8b39c 2731
dfe67012 2732 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
9c6bd790
JB		 2733}
2734
2735int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2736{
2737 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2738
2739 kfree(ifsta->extra_ie);
2740 if (len == 0) {
2741 ifsta->extra_ie = NULL;
2742 ifsta->extra_ie_len = 0;
60f8b39c 2743 return 0;
60f8b39c 2744 }
9c6bd790
JB		 2745 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2746 if (!ifsta->extra_ie) {
2747 ifsta->extra_ie_len = 0;
2748 return -ENOMEM;
2749 }
2750 memcpy(ifsta->extra_ie, ie, len);
2751 ifsta->extra_ie_len = len;
2752 return 0;
60f8b39c
JB		 2753}
2754
f698d856 2755int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2756{
f0706e82
JB		 2757 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2758
f4ea83dd 2759 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2760 sdata->dev->name, reason);
f0706e82 2761
05c914fe
JB		 2762 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2763 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2764 return -EINVAL;
2765
aa458d17 2766 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2767 return 0;
2768}
2769
f698d856 2770int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2771{
f0706e82
JB		 2772 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2773
f4ea83dd 2774 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2775 sdata->dev->name, reason);
f0706e82 2776
05c914fe 2777 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2778 return -EINVAL;
2779
d6f2da5b 2780 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2781 return -1;
2782
aa458d17 2783 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2784 return 0;
2785}
84363e6e 2786
9c6bd790
JB		 2787/* scan finished notification */
2788void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2789{
2790 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2791 struct ieee80211_if_sta *ifsta;
2792
05c914fe 2793 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790 2794 ifsta = &sdata->u.sta;
c0415b54
AF		 2795 if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2796 !ieee80211_sta_active_ibss(sdata))
9c6bd790
JB		 2797 ieee80211_sta_find_ibss(sdata, ifsta);
2798 }
2799
2800 /* Restart STA timers */
2801 rcu_read_lock();
2802 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2803 ieee80211_restart_sta_timer(sdata);
2804 rcu_read_unlock();
2805}
520eb820
KV		 2806
2807void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2808{
2809 struct ieee80211_local *local =
2810 container_of(work, struct ieee80211_local,
2811 dynamic_ps_disable_work);
2812
2813 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2814 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2815 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2816 }
2817
2818 ieee80211_wake_queues_by_reason(&local->hw,
2819 IEEE80211_QUEUE_STOP_REASON_PS);
2820}
2821
2822void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2823{
2824 struct ieee80211_local *local =
2825 container_of(work, struct ieee80211_local,
2826 dynamic_ps_enable_work);
a97b77b9 2827 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 2828
2829 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2830 return;
2831
4be8c387
JB		 2832 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2833 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2834
4be8c387 2835 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2836 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2837}
2838
2839void ieee80211_dynamic_ps_timer(unsigned long data)
2840{
2841 struct ieee80211_local *local = (void *) data;
2842
2843 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2844}
Linux kernel - Deliverables
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