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ath9k: remove passive scan on 5 GHz if country IE knows better
[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
60f8b39c 514/* MLME */
f698d856 515static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
c2b13452 516 struct ieee80211_bss *bss)
e2839d8f 517{
e2839d8f
VK		 518 struct ieee80211_local *local = sdata->local;
519 int i, have_higher_than_11mbit = 0;
520
e2839d8f
VK		 521 /* cf. IEEE 802.11 9.2.12 */
522 for (i = 0; i < bss->supp_rates_len; i++)
523 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
524 have_higher_than_11mbit = 1;
525
526 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
527 have_higher_than_11mbit)
528 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
529 else
530 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
531
3d35f7c6 532 ieee80211_set_wmm_default(sdata);
e2839d8f
VK		 533}
534
f698d856 535static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 536 struct ieee80211_if_sta *ifsta,
537 u8 *wmm_param, size_t wmm_param_len)
538{
f0706e82
JB		 539 struct ieee80211_tx_queue_params params;
540 size_t left;
541 int count;
542 u8 *pos;
543
3434fbd3
JB		 544 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
545 return;
546
547 if (!wmm_param)
548 return;
549
f0706e82
JB		 550 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
551 return;
552 count = wmm_param[6] & 0x0f;
553 if (count == ifsta->wmm_last_param_set)
554 return;
555 ifsta->wmm_last_param_set = count;
556
557 pos = wmm_param + 8;
558 left = wmm_param_len - 8;
559
560 memset(&params, 0, sizeof(params));
561
562 if (!local->ops->conf_tx)
563 return;
564
565 local->wmm_acm = 0;
566 for (; left >= 4; left -= 4, pos += 4) {
567 int aci = (pos[0] >> 5) & 0x03;
568 int acm = (pos[0] >> 4) & 0x01;
569 int queue;
570
571 switch (aci) {
572 case 1:
e100bb64 573 queue = 3;
988c0f72 574 if (acm)
f0706e82 575 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 576 break;
577 case 2:
e100bb64 578 queue = 1;
988c0f72 579 if (acm)
f0706e82 580 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 581 break;
582 case 3:
e100bb64 583 queue = 0;
988c0f72 584 if (acm)
f0706e82 585 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 586 break;
587 case 0:
588 default:
e100bb64 589 queue = 2;
988c0f72 590 if (acm)
f0706e82 591 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 592 break;
593 }
594
595 params.aifs = pos[0] & 0x0f;
596 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
597 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 598 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 599#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 600 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 601 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 602 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 603 params.cw_max, params.txop);
604#endif
f0706e82
JB		 605 /* TODO: handle ACM (block TX, fallback to next lowest allowed
606 * AC for now) */
607 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
608 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 609 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 610 }
611 }
612}
613
a97b77b9
VN		 614static bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc)
615{
616 u8 mask;
617 u8 index, indexn1, indexn2;
618 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
619
620 aid &= 0x3fff;
621 index = aid / 8;
622 mask = 1 << (aid & 7);
623
624 if (tim->bitmap_ctrl & 0x01)
625 *is_mc = true;
626
627 indexn1 = tim->bitmap_ctrl & 0xfe;
628 indexn2 = elems->tim_len + indexn1 - 4;
629
630 if (index < indexn1 || index > indexn2)
631 return false;
632
633 index -= indexn1;
634
635 return !!(tim->virtual_map[index] & mask);
636}
637
7a5158ef
JB		 638static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
639 u16 capab, bool erp_valid, u8 erp)
5628221c 640{
bda3933a 641 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 642#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 643 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ebd74487 644#endif
471b3efd 645 u32 changed = 0;
7a5158ef
JB		 646 bool use_protection;
647 bool use_short_preamble;
648 bool use_short_slot;
649
650 if (erp_valid) {
651 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
652 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
653 } else {
654 use_protection = false;
655 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
656 }
657
658 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 659
471b3efd 660 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 661#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 662 if (net_ratelimit()) {
0c68ae26 663 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 664 sdata->dev->name,
5628221c 665 use_protection ? "enabled" : "disabled",
0c68ae26 666 ifsta->bssid);
5628221c 667 }
f4ea83dd 668#endif
471b3efd
JB		 669 bss_conf->use_cts_prot = use_protection;
670 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 671 }
7e9ed188 672
d43c7b37 673 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 674#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 675 if (net_ratelimit()) {
676 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 677 " (BSSID=%pM)\n",
471b3efd 678 sdata->dev->name,
d43c7b37 679 use_short_preamble ? "short" : "long",
0c68ae26 680 ifsta->bssid);
7e9ed188 681 }
f4ea83dd 682#endif
d43c7b37 683 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 684 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 685 }
d9430a32 686
7a5158ef
JB		 687 if (use_short_slot != bss_conf->use_short_slot) {
688#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
689 if (net_ratelimit()) {
391429c1
CL		 690 printk(KERN_DEBUG "%s: switched to %s slot time"
691 " (BSSID=%pM)\n",
7a5158ef
JB		 692 sdata->dev->name,
693 use_short_slot ? "short" : "long",
694 ifsta->bssid);
695 }
696#endif
697 bss_conf->use_short_slot = use_short_slot;
698 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 699 }
700
701 return changed;
702}
703
f5e5bf25
TW		 704static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
705 struct ieee80211_if_sta *ifsta)
706{
707 union iwreq_data wrqu;
708 memset(&wrqu, 0, sizeof(wrqu));
709 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
710 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
711 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
712 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
713}
714
f698d856 715static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 716 struct ieee80211_if_sta *ifsta)
717{
74af0250
LT		 718 char *buf;
719 size_t len;
720 int i;
f0706e82
JB		 721 union iwreq_data wrqu;
722
74af0250
LT		 723 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
724 return;
725
726 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
727 ifsta->assocresp_ies_len), GFP_KERNEL);
728 if (!buf)
729 return;
730
731 len = sprintf(buf, "ASSOCINFO(");
f0706e82 732 if (ifsta->assocreq_ies) {
74af0250
LT		 733 len += sprintf(buf + len, "ReqIEs=");
734 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
735 len += sprintf(buf + len, "%02x",
736 ifsta->assocreq_ies[i]);
737 }
f0706e82 738 }
087d833e 739 if (ifsta->assocresp_ies) {
74af0250
LT		 740 if (ifsta->assocreq_ies)
741 len += sprintf(buf + len, " ");
742 len += sprintf(buf + len, "RespIEs=");
743 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
744 len += sprintf(buf + len, "%02x",
745 ifsta->assocresp_ies[i]);
746 }
f0706e82 747 }
74af0250
LT		 748 len += sprintf(buf + len, ")");
749
750 if (len > IW_CUSTOM_MAX) {
751 len = sprintf(buf, "ASSOCRESPIE=");
752 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
753 len += sprintf(buf + len, "%02x",
754 ifsta->assocresp_ies[i]);
755 }
756 }
757
ad788b5e
JL		 758 if (len <= IW_CUSTOM_MAX) {
759 memset(&wrqu, 0, sizeof(wrqu));
760 wrqu.data.length = len;
761 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
762 }
74af0250
LT		 763
764 kfree(buf);
f0706e82
JB		 765}
766
767
f698d856 768static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026
JB		 769 struct ieee80211_if_sta *ifsta,
770 u32 bss_info_changed)
f0706e82 771{
471b3efd 772 struct ieee80211_local *local = sdata->local;
38668c05 773 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 774
c2b13452 775 struct ieee80211_bss *bss;
d6f2da5b 776
ae5eb026 777 bss_info_changed |= BSS_CHANGED_ASSOC;
f5e5bf25 778 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 779
05c914fe 780 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f5e5bf25 781 return;
21c0cbe7 782
f5e5bf25
TW		 783 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
784 conf->channel->center_freq,
785 ifsta->ssid, ifsta->ssid_len);
786 if (bss) {
787 /* set timing information */
bda3933a
JB		 788 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
789 sdata->vif.bss_conf.timestamp = bss->timestamp;
790 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 791
ae5eb026 792 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
7a5158ef 793 bss->capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 794
795 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 796 }
797
9ac19a90
JB		 798 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
799 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
800 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 801
9ac19a90
JB		 802 ifsta->last_probe = jiffies;
803 ieee80211_led_assoc(local, 1);
9306102e 804
bda3933a 805 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 806 /*
807 * For now just always ask the driver to update the basic rateset
808 * when we have associated, we aren't checking whether it actually
809 * changed or not.
810 */
ae5eb026
JB		 811 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
812 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 813
4be8c387
JB		 814 if (local->powersave) {
815 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
816 local->hw.conf.dynamic_ps_timeout > 0) {
520eb820 817 mod_timer(&local->dynamic_ps_timer, jiffies +
46f2c4bd
JB		 818 msecs_to_jiffies(
819 local->hw.conf.dynamic_ps_timeout));
4be8c387
JB		 820 } else {
821 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
822 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 823 conf->flags |= IEEE80211_CONF_PS;
4be8c387 824 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
520eb820 825 }
e0cb686f
KV		 826 }
827
9ac19a90
JB		 828 netif_tx_start_all_queues(sdata->dev);
829 netif_carrier_on(sdata->dev);
f0706e82 830
9ac19a90 831 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 832}
833
9ac19a90
JB		 834static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
835 struct ieee80211_if_sta *ifsta)
f0706e82 836{
9ac19a90
JB		 837 ifsta->direct_probe_tries++;
838 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB		 839 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
840 sdata->dev->name, ifsta->bssid);
9ac19a90 841 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 842 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 843 return;
844 }
f0706e82 845
0c68ae26
JB		 846 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
847 sdata->dev->name, ifsta->bssid,
9ac19a90 848 ifsta->direct_probe_tries);
f0706e82 849
9ac19a90 850 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 851
9ac19a90
JB		 852 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
853
854 /* Direct probe is sent to broadcast address as some APs
855 * will not answer to direct packet in unassociated state.
856 */
857 ieee80211_send_probe_req(sdata, NULL,
858 ifsta->ssid, ifsta->ssid_len);
859
860 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 861}
f0706e82 862
9ac19a90
JB		 863
864static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
865 struct ieee80211_if_sta *ifsta)
f0706e82 866{
9ac19a90
JB		 867 ifsta->auth_tries++;
868 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 869 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 870 " timed out\n",
0c68ae26 871 sdata->dev->name, ifsta->bssid);
9ac19a90 872 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 873 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 874 return;
875 }
f0706e82 876
9ac19a90 877 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB		 878 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
879 sdata->dev->name, ifsta->bssid);
f0706e82 880
9ac19a90
JB		 881 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
882
883 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 884}
885
5925d976
VN		 886/*
887 * The disassoc 'reason' argument can be either our own reason
888 * if self disconnected or a reason code from the AP.
889 */
aa458d17
TW		 890static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
891 struct ieee80211_if_sta *ifsta, bool deauth,
892 bool self_disconnected, u16 reason)
893{
894 struct ieee80211_local *local = sdata->local;
895 struct sta_info *sta;
e0cb686f 896 u32 changed = 0, config_changed = 0;
aa458d17
TW		 897
898 rcu_read_lock();
899
900 sta = sta_info_get(local, ifsta->bssid);
901 if (!sta) {
902 rcu_read_unlock();
903 return;
904 }
905
906 if (deauth) {
907 ifsta->direct_probe_tries = 0;
908 ifsta->auth_tries = 0;
909 }
910 ifsta->assoc_scan_tries = 0;
911 ifsta->assoc_tries = 0;
912
24e64622 913 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 914 netif_carrier_off(sdata->dev);
915
17741cdc 916 ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
aa458d17
TW		 917
918 if (self_disconnected) {
919 if (deauth)
ef422bc0
JB		 920 ieee80211_send_deauth_disassoc(sdata,
921 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 922 else
ef422bc0
JB		 923 ieee80211_send_deauth_disassoc(sdata,
924 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 925 }
926
f5e5bf25
TW		 927 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
928 changed |= ieee80211_reset_erp_info(sdata);
929
f5e5bf25 930 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 931 changed |= BSS_CHANGED_ASSOC;
932 sdata->vif.bss_conf.assoc = false;
f5e5bf25
TW		 933
934 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17 935
5925d976 936 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT)
aa458d17
TW		 937 ifsta->state = IEEE80211_STA_MLME_DISABLED;
938
aa458d17
TW		 939 rcu_read_unlock();
940
4797938c 941 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 942 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 943
a8302de9
VT		 944 local->power_constr_level = 0;
945
520eb820
KV		 946 del_timer_sync(&local->dynamic_ps_timer);
947 cancel_work_sync(&local->dynamic_ps_enable_work);
948
e0cb686f
KV		 949 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
950 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
951 config_changed |= IEEE80211_CONF_CHANGE_PS;
952 }
ae5eb026 953
e0cb686f 954 ieee80211_hw_config(local, config_changed);
ae5eb026 955 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 956
957 rcu_read_lock();
958
959 sta = sta_info_get(local, ifsta->bssid);
960 if (!sta) {
961 rcu_read_unlock();
962 return;
963 }
964
965 sta_info_unlink(&sta);
966
967 rcu_read_unlock();
968
969 sta_info_destroy(sta);
aa458d17 970}
f0706e82 971
9ac19a90
JB		 972static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
973{
974 if (!sdata || !sdata->default_key ||
975 sdata->default_key->conf.alg != ALG_WEP)
976 return 0;
977 return 1;
978}
979
f698d856 980static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 981 struct ieee80211_if_sta *ifsta)
982{
f698d856 983 struct ieee80211_local *local = sdata->local;
c2b13452 984 struct ieee80211_bss *bss;
5b98b1f7
JB		 985 int bss_privacy;
986 int wep_privacy;
987 int privacy_invoked;
f0706e82 988
5b98b1f7 989 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 990 return 0;
991
f698d856 992 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 993 local->hw.conf.channel->center_freq,
cffdd30d 994 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 995 if (!bss)
996 return 0;
997
5b98b1f7 998 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 999 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1000 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1001
3e122be0 1002 ieee80211_rx_bss_put(local, bss);
f0706e82 1003
5b98b1f7
JB		 1004 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1005 return 0;
1006
1007 return 1;
f0706e82
JB		 1008}
1009
f698d856 1010static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1011 struct ieee80211_if_sta *ifsta)
1012{
1013 ifsta->assoc_tries++;
1014 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1015 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1016 " timed out\n",
0c68ae26 1017 sdata->dev->name, ifsta->bssid);
48c2fc59 1018 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 1019 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 1020 return;
1021 }
1022
48c2fc59 1023 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB		 1024 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1025 sdata->dev->name, ifsta->bssid);
f698d856 1026 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1027 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1028 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1029 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1030 return;
1031 }
1032
f698d856 1033 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1034
1035 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1036}
1037
1038
f698d856 1039static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1040 struct ieee80211_if_sta *ifsta)
1041{
f698d856 1042 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1043 struct sta_info *sta;
1044 int disassoc;
1045
1046 /* TODO: start monitoring current AP signal quality and number of
1047 * missed beacons. Scan other channels every now and then and search
1048 * for better APs. */
1049 /* TODO: remove expired BSSes */
1050
48c2fc59 1051 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1052
d0709a65
JB		 1053 rcu_read_lock();
1054
f0706e82
JB		 1055 sta = sta_info_get(local, ifsta->bssid);
1056 if (!sta) {
0c68ae26
JB		 1057 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1058 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 1059 disassoc = 1;
1060 } else {
1061 disassoc = 0;
1062 if (time_after(jiffies,
1063 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1064 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1065 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 1066 "current AP %pM - assume out of "
f0706e82 1067 "range\n",
0c68ae26 1068 sdata->dev->name, ifsta->bssid);
f0706e82 1069 disassoc = 1;
d6f2da5b 1070 } else
f698d856 1071 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 1072 ifsta->ssid,
1073 ifsta->ssid_len);
d6f2da5b 1074 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1075 } else {
d6f2da5b 1076 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1077 if (time_after(jiffies, ifsta->last_probe +
1078 IEEE80211_PROBE_INTERVAL)) {
1079 ifsta->last_probe = jiffies;
f698d856 1080 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1081 ifsta->ssid,
1082 ifsta->ssid_len);
1083 }
1084 }
f0706e82 1085 }
d0709a65
JB		 1086
1087 rcu_read_unlock();
1088
60f8b39c
JB		 1089 if (disassoc)
1090 ieee80211_set_disassoc(sdata, ifsta, true, true,
1091 WLAN_REASON_PREV_AUTH_NOT_VALID);
1092 else
1093 mod_timer(&ifsta->timer, jiffies +
1094 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1095}
1096
1097
f698d856 1098static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1099 struct ieee80211_if_sta *ifsta)
1100{
f698d856 1101 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1102 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1103 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1104}
1105
1106
f698d856 1107static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1108 struct ieee80211_if_sta *ifsta,
1109 struct ieee80211_mgmt *mgmt,
1110 size_t len)
1111{
1112 u8 *pos;
1113 struct ieee802_11_elems elems;
1114
f0706e82 1115 pos = mgmt->u.auth.variable;
67a4cce4 1116 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1117 if (!elems.challenge)
f0706e82 1118 return;
f698d856 1119 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1120 elems.challenge_len + 2, 1);
1121}
1122
f698d856 1123static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1124 struct ieee80211_if_sta *ifsta,
1125 struct ieee80211_mgmt *mgmt,
1126 size_t len)
1127{
f0706e82
JB		 1128 u16 auth_alg, auth_transaction, status_code;
1129
48c2fc59 1130 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1131 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1132 return;
f0706e82 1133
f4ea83dd 1134 if (len < 24 + 6)
f0706e82 1135 return;
f0706e82 1136
05c914fe 1137 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1138 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1139 return;
f0706e82 1140
05c914fe 1141 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1142 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1143 return;
f0706e82
JB		 1144
1145 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1146 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1147 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1148
05c914fe 1149 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1150 /*
1151 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1152 * networks and most implementations do not seem to use it.
1153 * However, try to reply to authentication attempts if someone
1154 * has actually implemented this.
135a2110 1155 */
f4ea83dd 1156 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1157 return;
f698d856 1158 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1159 }
1160
1161 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1162 auth_transaction != ifsta->auth_transaction)
f0706e82 1163 return;
f0706e82
JB		 1164
1165 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1166 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1167 u8 algs[3];
1168 const int num_algs = ARRAY_SIZE(algs);
1169 int i, pos;
1170 algs[0] = algs[1] = algs[2] = 0xff;
1171 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1172 algs[0] = WLAN_AUTH_OPEN;
1173 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1174 algs[1] = WLAN_AUTH_SHARED_KEY;
1175 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1176 algs[2] = WLAN_AUTH_LEAP;
1177 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1178 pos = 0;
1179 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1180 pos = 1;
1181 else
1182 pos = 2;
1183 for (i = 0; i < num_algs; i++) {
1184 pos++;
1185 if (pos >= num_algs)
1186 pos = 0;
1187 if (algs[pos] == ifsta->auth_alg ||
1188 algs[pos] == 0xff)
1189 continue;
1190 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1191 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1192 continue;
1193 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1194 break;
1195 }
1196 }
1197 return;
1198 }
1199
1200 switch (ifsta->auth_alg) {
1201 case WLAN_AUTH_OPEN:
1202 case WLAN_AUTH_LEAP:
f698d856 1203 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1204 break;
1205 case WLAN_AUTH_SHARED_KEY:
1206 if (ifsta->auth_transaction == 4)
f698d856 1207 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1208 else
f698d856 1209 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1210 break;
1211 }
1212}
1213
1214
f698d856 1215static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1216 struct ieee80211_if_sta *ifsta,
1217 struct ieee80211_mgmt *mgmt,
1218 size_t len)
1219{
1220 u16 reason_code;
1221
f4ea83dd 1222 if (len < 24 + 2)
f0706e82 1223 return;
f0706e82 1224
f4ea83dd 1225 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1226 return;
f0706e82
JB		 1227
1228 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1229
988c0f72 1230 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1231 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1232 sdata->dev->name, reason_code);
f0706e82 1233
48c2fc59
TW		 1234 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1235 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1236 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1237 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1238 mod_timer(&ifsta->timer, jiffies +
1239 IEEE80211_RETRY_AUTH_INTERVAL);
1240 }
1241
aa458d17 1242 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1243 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1244}
1245
1246
f698d856 1247static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1248 struct ieee80211_if_sta *ifsta,
1249 struct ieee80211_mgmt *mgmt,
1250 size_t len)
1251{
1252 u16 reason_code;
1253
f4ea83dd 1254 if (len < 24 + 2)
f0706e82 1255 return;
f0706e82 1256
f4ea83dd 1257 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1258 return;
f0706e82
JB		 1259
1260 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1261
d6f2da5b 1262 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1263 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1264 sdata->dev->name, reason_code);
f0706e82 1265
48c2fc59
TW		 1266 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1267 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1268 mod_timer(&ifsta->timer, jiffies +
1269 IEEE80211_RETRY_AUTH_INTERVAL);
1270 }
1271
5925d976 1272 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB		 1273}
1274
1275
471b3efd 1276static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1277 struct ieee80211_if_sta *ifsta,
1278 struct ieee80211_mgmt *mgmt,
1279 size_t len,
1280 int reassoc)
1281{
471b3efd 1282 struct ieee80211_local *local = sdata->local;
8318d78a 1283 struct ieee80211_supported_band *sband;
f0706e82 1284 struct sta_info *sta;
881d948c 1285 u32 rates, basic_rates;
f0706e82
JB		 1286 u16 capab_info, status_code, aid;
1287 struct ieee802_11_elems elems;
bda3933a 1288 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1289 u8 *pos;
ae5eb026 1290 u32 changed = 0;
f0706e82 1291 int i, j;
ddf4ac53 1292 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1293 u16 ap_ht_cap_flags;
f0706e82
JB		 1294
1295 /* AssocResp and ReassocResp have identical structure, so process both
1296 * of them in this function. */
1297
48c2fc59 1298 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1299 return;
f0706e82 1300
f4ea83dd 1301 if (len < 24 + 6)
f0706e82 1302 return;
f0706e82 1303
f4ea83dd 1304 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1305 return;
f0706e82
JB		 1306
1307 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1308 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1309 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1310
0c68ae26 1311 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1312 "status=%d aid=%d)\n",
0c68ae26 1313 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1314 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1315
63a5ab82
JM		 1316 pos = mgmt->u.assoc_resp.variable;
1317 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1318
1319 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1320 elems.timeout_int && elems.timeout_int_len == 5 &&
1321 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1322 u32 tu, ms;
f797eb7e 1323 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1324 ms = tu * 1024 / 1000;
1325 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1326 "comeback duration %u TU (%u ms)\n",
1327 sdata->dev->name, tu, ms);
1328 if (ms > IEEE80211_ASSOC_TIMEOUT)
1329 mod_timer(&ifsta->timer,
1330 jiffies + msecs_to_jiffies(ms));
1331 return;
1332 }
1333
f0706e82
JB		 1334 if (status_code != WLAN_STATUS_SUCCESS) {
1335 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1336 sdata->dev->name, status_code);
8a69aa93
DD		 1337 /* if this was a reassociation, ensure we try a "full"
1338 * association next time. This works around some broken APs
1339 * which do not correctly reject reassociation requests. */
d6f2da5b 1340 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1341 return;
1342 }
1343
1dd84aa2
JB		 1344 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1345 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1346 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1347 aid &= ~(BIT(15) | BIT(14));
1348
f0706e82
JB		 1349 if (!elems.supp_rates) {
1350 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1351 sdata->dev->name);
f0706e82
JB		 1352 return;
1353 }
1354
f698d856 1355 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1356 ifsta->aid = aid;
1357 ifsta->ap_capab = capab_info;
1358
1359 kfree(ifsta->assocresp_ies);
1360 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1361 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1362 if (ifsta->assocresp_ies)
1363 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1364
d0709a65
JB		 1365 rcu_read_lock();
1366
f0706e82
JB		 1367 /* Add STA entry for the AP */
1368 sta = sta_info_get(local, ifsta->bssid);
1369 if (!sta) {
c2b13452 1370 struct ieee80211_bss *bss;
ddf4ac53
JB		 1371
1372 newsta = true;
d0709a65 1373
73651ee6
JB		 1374 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1375 if (!sta) {
1376 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1377 " the AP\n", sdata->dev->name);
d0709a65 1378 rcu_read_unlock();
f0706e82
JB		 1379 return;
1380 }
60f8b39c
JB		 1381 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1382 local->hw.conf.channel->center_freq,
1383 ifsta->ssid, ifsta->ssid_len);
1384 if (bss) {
1385 sta->last_signal = bss->signal;
1386 sta->last_qual = bss->qual;
1387 sta->last_noise = bss->noise;
1388 ieee80211_rx_bss_put(local, bss);
1389 }
f709fc69 1390
60f8b39c
JB		 1391 /* update new sta with its last rx activity */
1392 sta->last_rx = jiffies;
f709fc69 1393 }
f709fc69 1394
60f8b39c
JB		 1395 /*
1396 * FIXME: Do we really need to update the sta_info's information here?
1397 * We already know about the AP (we found it in our list) so it
1398 * should already be filled with the right info, no?
1399 * As is stands, all this is racy because typically we assume
1400 * the information that is filled in here (except flags) doesn't
1401 * change while a STA structure is alive. As such, it should move
1402 * to between the sta_info_alloc() and sta_info_insert() above.
1403 */
f709fc69 1404
60f8b39c
JB		 1405 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1406 WLAN_STA_AUTHORIZED);
05e5e883 1407
60f8b39c
JB		 1408 rates = 0;
1409 basic_rates = 0;
1410 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1411
60f8b39c
JB		 1412 for (i = 0; i < elems.supp_rates_len; i++) {
1413 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1414 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1415
60f8b39c
JB		 1416 if (rate > 110)
1417 have_higher_than_11mbit = true;
1418
1419 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1420 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1421 rates |= BIT(j);
d61272cb
TW		 1422 if (is_basic)
1423 basic_rates |= BIT(j);
1424 break;
1425 }
f709fc69 1426 }
f709fc69
LCC		 1427 }
1428
60f8b39c
JB		 1429 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1430 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1431 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1432
60f8b39c
JB		 1433 if (rate > 110)
1434 have_higher_than_11mbit = true;
f0706e82 1435
60f8b39c 1436 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1437 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1438 rates |= BIT(j);
d61272cb
TW		 1439 if (is_basic)
1440 basic_rates |= BIT(j);
1441 break;
1442 }
60f8b39c 1443 }
1ebebea8 1444 }
f0706e82 1445
323ce79a 1446 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1447 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1448
1449 /* cf. IEEE 802.11 9.2.12 */
1450 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1451 have_higher_than_11mbit)
1452 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1453 else
1454 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1455
ae5eb026
JB		 1456 if (elems.ht_cap_elem)
1457 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1458 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1459
1460 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1461
4b7679a5 1462 rate_control_rate_init(sta);
f0706e82 1463
5394af4d
JM		 1464 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1465 set_sta_flags(sta, WLAN_STA_MFP);
1466
ddf4ac53 1467 if (elems.wmm_param)
60f8b39c 1468 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1469
1470 if (newsta) {
1471 int err = sta_info_insert(sta);
1472 if (err) {
1473 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1474 " the AP (error %d)\n", sdata->dev->name, err);
1475 rcu_read_unlock();
1476 return;
1477 }
1478 }
1479
1480 rcu_read_unlock();
1481
1482 if (elems.wmm_param)
60f8b39c
JB		 1483 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1484 elems.wmm_param_len);
f0706e82 1485
ae5eb026
JB		 1486 if (elems.ht_info_elem && elems.wmm_param &&
1487 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1488 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1489 ap_ht_cap_flags);
1490
60f8b39c
JB		 1491 /* set AID and assoc capability,
1492 * ieee80211_set_associated() will tell the driver */
1493 bss_conf->aid = aid;
1494 bss_conf->assoc_capability = capab_info;
ae5eb026 1495 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1496
60f8b39c 1497 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1498}
1499
1500
f698d856 1501static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1502 struct ieee80211_if_sta *ifsta,
c2b13452 1503 struct ieee80211_bss *bss)
a607268a 1504{
f698d856 1505 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1506 int res, rates, i, j;
1507 struct sk_buff *skb;
1508 struct ieee80211_mgmt *mgmt;
a607268a 1509 u8 *pos;
a607268a 1510 struct ieee80211_supported_band *sband;
507b06d0 1511 union iwreq_data wrqu;
a607268a 1512
9aed3cc1
JM		 1513 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1514 sdata->u.sta.ie_proberesp_len);
e2ef12d3
RR		 1515 if (!skb) {
1516 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1517 "response\n", sdata->dev->name);
1518 return -ENOMEM;
1519 }
1520
a607268a
BR		 1521 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1522
1523 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1524 sta_info_flush_delayed(sdata);
a607268a
BR		 1525
1526 if (local->ops->reset_tsf) {
1527 /* Reset own TSF to allow time synchronization work. */
1528 local->ops->reset_tsf(local_to_hw(local));
1529 }
1530 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1531 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1532 if (res)
1533 return res;
1534
1535 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1536
a607268a
BR		 1537 sdata->drop_unencrypted = bss->capability &
1538 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1539
f698d856 1540 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1541
be038b37
AK		 1542 if (res)
1543 return res;
a607268a 1544
9d139c81 1545 /* Build IBSS probe response */
a607268a 1546
e2ef12d3 1547 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1548
e2ef12d3
RR		 1549 mgmt = (struct ieee80211_mgmt *)
1550 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1551 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1552 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1553 IEEE80211_STYPE_PROBE_RESP);
1554 memset(mgmt->da, 0xff, ETH_ALEN);
1555 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1556 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1557 mgmt->u.beacon.beacon_int =
1558 cpu_to_le16(local->hw.conf.beacon_int);
1559 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1560 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
a607268a 1561
e2ef12d3
RR		 1562 pos = skb_put(skb, 2 + ifsta->ssid_len);
1563 *pos++ = WLAN_EID_SSID;
1564 *pos++ = ifsta->ssid_len;
1565 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1566
e2ef12d3
RR		 1567 rates = bss->supp_rates_len;
1568 if (rates > 8)
1569 rates = 8;
1570 pos = skb_put(skb, 2 + rates);
1571 *pos++ = WLAN_EID_SUPP_RATES;
1572 *pos++ = rates;
1573 memcpy(pos, bss->supp_rates, rates);
1574
1575 if (bss->band == IEEE80211_BAND_2GHZ) {
1576 pos = skb_put(skb, 2 + 1);
1577 *pos++ = WLAN_EID_DS_PARAMS;
1578 *pos++ = 1;
1579 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1580 }
a607268a 1581
e2ef12d3
RR		 1582 pos = skb_put(skb, 2 + 2);
1583 *pos++ = WLAN_EID_IBSS_PARAMS;
1584 *pos++ = 2;
1585 /* FIX: set ATIM window based on scan results */
1586 *pos++ = 0;
1587 *pos++ = 0;
e039fa4a 1588
e2ef12d3
RR		 1589 if (bss->supp_rates_len > 8) {
1590 rates = bss->supp_rates_len - 8;
1591 pos = skb_put(skb, 2 + rates);
1592 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1593 *pos++ = rates;
1594 memcpy(pos, &bss->supp_rates[8], rates);
9d139c81 1595 }
a607268a 1596
9aed3cc1
JM		 1597 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1598 sdata->u.sta.ie_proberesp_len);
1599
e2ef12d3
RR		 1600 ifsta->probe_resp = skb;
1601
078e1e60
JB		 1602 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1603 IEEE80211_IFCC_BEACON_ENABLED);
e2ef12d3
RR		 1604
1605
9d139c81
JB		 1606 rates = 0;
1607 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1608 for (i = 0; i < bss->supp_rates_len; i++) {
1609 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1610 for (j = 0; j < sband->n_bitrates; j++)
1611 if (sband->bitrates[j].bitrate == bitrate)
1612 rates |= BIT(j);
a607268a 1613 }
9d139c81
JB		 1614 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1615
b079ada7 1616 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1617
dfe67012 1618 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
48c2fc59 1619 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1620 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1621
4492bea6
EG		 1622 ieee80211_led_assoc(local, true);
1623
507b06d0
DW		 1624 memset(&wrqu, 0, sizeof(wrqu));
1625 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1626 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1627
1628 return res;
1629}
1630
98c8fccf
JB		 1631static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1632 struct ieee80211_mgmt *mgmt,
1633 size_t len,
1634 struct ieee80211_rx_status *rx_status,
1635 struct ieee802_11_elems *elems,
1636 bool beacon)
1637{
1638 struct ieee80211_local *local = sdata->local;
1639 int freq;
c2b13452 1640 struct ieee80211_bss *bss;
98c8fccf
JB		 1641 struct sta_info *sta;
1642 struct ieee80211_channel *channel;
1643 u64 beacon_timestamp, rx_timestamp;
881d948c 1644 u32 supp_rates = 0;
98c8fccf 1645 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 1646
1647 if (elems->ds_params && elems->ds_params_len == 1)
1648 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1649 else
1650 freq = rx_status->freq;
1651
1652 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1653
1654 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1655 return;
1656
05c914fe 1657 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1658 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1659 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1660
1661 rcu_read_lock();
1662
1663 sta = sta_info_get(local, mgmt->sa);
1664 if (sta) {
881d948c 1665 u32 prev_rates;
98c8fccf 1666
323ce79a 1667 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1668 /* make sure mandatory rates are always added */
323ce79a 1669 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1670 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1671
1672#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1673 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1674 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1675 "for %pM based on beacon info (0x%llx | "
98c8fccf 1676 "0x%llx -> 0x%llx)\n",
17741cdc 1677 sdata->dev->name,
0c68ae26 1678 sta->sta.addr,
98c8fccf
JB		 1679 (unsigned long long) prev_rates,
1680 (unsigned long long) supp_rates,
323ce79a 1681 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1682#endif
1683 } else {
ab1f5c0b 1684 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB		 1685 }
1686
1687 rcu_read_unlock();
1688 }
1689
1690 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1691 freq, beacon);
1692 if (!bss)
1693 return;
1694
c481ec97
S		 1695 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1696 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1697 struct ieee80211_channel_sw_ie *sw_elem =
1698 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1699 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1700 }
1701
98c8fccf
JB		 1702 /* was just updated in ieee80211_bss_info_update */
1703 beacon_timestamp = bss->timestamp;
1704
30b89b0f
JB		 1705 /*
1706 * In STA mode, the remaining parameters should not be overridden
1707 * by beacons because they're not necessarily accurate there.
1708 */
05c914fe 1709 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1710 bss->last_probe_resp && beacon) {
3e122be0 1711 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1712 return;
1713 }
1714
9d9bf77d 1715 /* check if we need to merge IBSS */
05c914fe 1716 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
65f0e6a3 1717 (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
fba4a1e6 1718 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1719 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1720 elems->ssid_len == sdata->u.sta.ssid_len &&
1721 memcmp(elems->ssid, sdata->u.sta.ssid,
1722 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1723 if (rx_status->flag & RX_FLAG_TSFT) {
1724 /* in order for correct IBSS merging we need mactime
1725 *
1726 * since mactime is defined as the time the first data
1727 * symbol of the frame hits the PHY, and the timestamp
1728 * of the beacon is defined as "the time that the data
1729 * symbol containing the first bit of the timestamp is
1730 * transmitted to the PHY plus the transmitting STA’s
1731 * delays through its local PHY from the MAC-PHY
1732 * interface to its interface with the WM"
1733 * (802.11 11.1.2) - equals the time this bit arrives at
1734 * the receiver - we have to take into account the
1735 * offset between the two.
1736 * e.g: at 1 MBit that means mactime is 192 usec earlier
1737 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1738 */
0fb8ca45
JM		 1739 int rate;
1740 if (rx_status->flag & RX_FLAG_HT) {
1741 rate = 65; /* TODO: HT rates */
1742 } else {
1743 rate = local->hw.wiphy->bands[band]->
9d9bf77d 1744 bitrates[rx_status->rate_idx].bitrate;
0fb8ca45 1745 }
9d9bf77d
BR		 1746 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1747 } else if (local && local->ops && local->ops->get_tsf)
1748 /* second best option: get current TSF */
1749 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1750 else
1751 /* can't merge without knowing the TSF */
1752 rx_timestamp = -1LLU;
1753#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1754 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1755 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1756 mgmt->sa, mgmt->bssid,
9d9bf77d
BR		 1757 (unsigned long long)rx_timestamp,
1758 (unsigned long long)beacon_timestamp,
1759 (unsigned long long)(rx_timestamp - beacon_timestamp),
1760 jiffies);
1761#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1762 if (beacon_timestamp > rx_timestamp) {
576fdeae 1763#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd 1764 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB		 1765 "local TSF - IBSS merge with BSSID %pM\n",
1766 sdata->dev->name, mgmt->bssid);
fba4a1e6 1767#endif
f698d856 1768 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
ab1f5c0b 1769 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR		 1770 }
1771 }
1772
3e122be0 1773 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1774}
1775
1776
f698d856 1777static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1778 struct ieee80211_mgmt *mgmt,
1779 size_t len,
1780 struct ieee80211_rx_status *rx_status)
1781{
ae6a44e3
EK		 1782 size_t baselen;
1783 struct ieee802_11_elems elems;
9859b81e 1784 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1785
8e7cdbb6
TW		 1786 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1787 return; /* ignore ProbeResp to foreign address */
1788
ae6a44e3
EK		 1789 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1790 if (baselen > len)
1791 return;
1792
1793 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1794 &elems);
1795
98c8fccf 1796 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1797
1798 /* direct probe may be part of the association flow */
1799 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1800 &ifsta->request)) {
1801 printk(KERN_DEBUG "%s direct probe responded\n",
1802 sdata->dev->name);
1803 ieee80211_authenticate(sdata, ifsta);
1804 }
f0706e82
JB		 1805}
1806
1807
f698d856 1808static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1809 struct ieee80211_mgmt *mgmt,
1810 size_t len,
1811 struct ieee80211_rx_status *rx_status)
1812{
f0706e82 1813 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1814 size_t baselen;
1815 struct ieee802_11_elems elems;
f698d856 1816 struct ieee80211_local *local = sdata->local;
471b3efd 1817 u32 changed = 0;
a97b77b9 1818 bool erp_valid, directed_tim, is_mc = false;
7a5158ef 1819 u8 erp_value = 0;
f0706e82 1820
ae6a44e3
EK		 1821 /* Process beacon from the current BSS */
1822 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1823 if (baselen > len)
1824 return;
1825
1826 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1827
98c8fccf 1828 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1829
05c914fe 1830 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1831 return;
1832 ifsta = &sdata->u.sta;
1833
d6f2da5b 1834 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1835 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1836 return;
1837
c481ec97
S		 1838 if (rx_status->freq != local->hw.conf.channel->center_freq)
1839 return;
1840
fe3fa827
JB		 1841 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1842 elems.wmm_param_len);
1843
4be8c387
JB		 1844 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1845 local->hw.conf.flags & IEEE80211_CONF_PS) {
a97b77b9
VN		 1846 directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
1847
1848 if (directed_tim || is_mc) {
4be8c387
JB		 1849 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1850 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1851 ieee80211_send_nullfunc(local, sdata, 0);
a97b77b9
VN		 1852 }
1853 }
7a5158ef
JB		 1854
1855 if (elems.erp_info && elems.erp_info_len >= 1) {
1856 erp_valid = true;
1857 erp_value = elems.erp_info[0];
1858 } else {
1859 erp_valid = false;
50c4afb9 1860 }
7a5158ef
JB		 1861 changed |= ieee80211_handle_bss_capability(sdata,
1862 le16_to_cpu(mgmt->u.beacon.capab_info),
1863 erp_valid, erp_value);
f0706e82 1864
d3c990fb 1865
ae5eb026
JB		 1866 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1867 struct sta_info *sta;
1868 struct ieee80211_supported_band *sband;
1869 u16 ap_ht_cap_flags;
1870
1871 rcu_read_lock();
1872
1873 sta = sta_info_get(local, ifsta->bssid);
1874 if (!sta) {
1875 rcu_read_unlock();
1876 return;
1877 }
1878
1879 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1880
1881 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1882 elems.ht_cap_elem, &sta->sta.ht_cap);
1883
1884 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1885
1886 rcu_read_unlock();
1887
1888 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1889 ap_ht_cap_flags);
d3c990fb
RR		 1890 }
1891
3f2355cb
LR		 1892 if (elems.country_elem) {
1893 /* Note we are only reviewing this on beacons
1894 * for the BSSID we are associated to */
1895 regulatory_hint_11d(local->hw.wiphy,
1896 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1897
1898 /* TODO: IBSS also needs this */
1899 if (elems.pwr_constr_elem)
1900 ieee80211_handle_pwr_constr(sdata,
1901 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1902 elems.pwr_constr_elem,
1903 elems.pwr_constr_elem_len);
3f2355cb
LR		 1904 }
1905
471b3efd 1906 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1907}
1908
1909
f698d856 1910static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1911 struct ieee80211_if_sta *ifsta,
1912 struct ieee80211_mgmt *mgmt,
504a71e4 1913 size_t len)
f0706e82 1914{
f698d856 1915 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1916 int tx_last_beacon;
1917 struct sk_buff *skb;
1918 struct ieee80211_mgmt *resp;
1919 u8 *pos, *end;
1920
05c914fe 1921 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1922 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1923 len < 24 + 2 || !ifsta->probe_resp)
1924 return;
1925
1926 if (local->ops->tx_last_beacon)
1927 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1928 else
1929 tx_last_beacon = 1;
1930
1931#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1932 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1933 " (tx_last_beacon=%d)\n",
1934 sdata->dev->name, mgmt->sa, mgmt->da,
1935 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 1936#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1937
1938 if (!tx_last_beacon)
1939 return;
1940
1941 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1942 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1943 return;
1944
1945 end = ((u8 *) mgmt) + len;
1946 pos = mgmt->u.probe_req.variable;
1947 if (pos[0] != WLAN_EID_SSID ||
1948 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1949#ifdef CONFIG_MAC80211_IBSS_DEBUG
1950 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 1951 "from %pM\n",
1952 sdata->dev->name, mgmt->sa);
f4ea83dd 1953#endif
f0706e82
JB		 1954 return;
1955 }
1956 if (pos[1] != 0 &&
1957 (pos[1] != ifsta->ssid_len ||
1958 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1959 /* Ignore ProbeReq for foreign SSID */
1960 return;
1961 }
1962
1963 /* Reply with ProbeResp */
0ec0b7ac 1964 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1965 if (!skb)
1966 return;
1967
1968 resp = (struct ieee80211_mgmt *) skb->data;
1969 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1970#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1971 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1972 sdata->dev->name, resp->da);
f0706e82 1973#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1974 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1975}
1976
f698d856 1977void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1978 struct ieee80211_rx_status *rx_status)
1979{
f698d856 1980 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1981 struct ieee80211_if_sta *ifsta;
1982 struct ieee80211_mgmt *mgmt;
1983 u16 fc;
1984
1985 if (skb->len < 24)
1986 goto fail;
1987
f0706e82
JB		 1988 ifsta = &sdata->u.sta;
1989
1990 mgmt = (struct ieee80211_mgmt *) skb->data;
1991 fc = le16_to_cpu(mgmt->frame_control);
1992
1993 switch (fc & IEEE80211_FCTL_STYPE) {
1994 case IEEE80211_STYPE_PROBE_REQ:
1995 case IEEE80211_STYPE_PROBE_RESP:
1996 case IEEE80211_STYPE_BEACON:
1997 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1998 case IEEE80211_STYPE_AUTH:
1999 case IEEE80211_STYPE_ASSOC_RESP:
2000 case IEEE80211_STYPE_REASSOC_RESP:
2001 case IEEE80211_STYPE_DEAUTH:
2002 case IEEE80211_STYPE_DISASSOC:
2003 skb_queue_tail(&ifsta->skb_queue, skb);
2004 queue_work(local->hw.workqueue, &ifsta->work);
2005 return;
f0706e82
JB		 2006 }
2007
2008 fail:
2009 kfree_skb(skb);
2010}
2011
f698d856 2012static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2013 struct sk_buff *skb)
2014{
2015 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2016 struct ieee80211_if_sta *ifsta;
2017 struct ieee80211_mgmt *mgmt;
2018 u16 fc;
2019
f0706e82
JB		 2020 ifsta = &sdata->u.sta;
2021
2022 rx_status = (struct ieee80211_rx_status *) skb->cb;
2023 mgmt = (struct ieee80211_mgmt *) skb->data;
2024 fc = le16_to_cpu(mgmt->frame_control);
2025
2026 switch (fc & IEEE80211_FCTL_STYPE) {
2027 case IEEE80211_STYPE_PROBE_REQ:
504a71e4 2028 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2029 break;
2030 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2031 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2032 break;
2033 case IEEE80211_STYPE_BEACON:
f698d856 2034 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2035 break;
2036 case IEEE80211_STYPE_AUTH:
f698d856 2037 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2038 break;
2039 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2040 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2041 break;
2042 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2043 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2044 break;
2045 case IEEE80211_STYPE_DEAUTH:
f698d856 2046 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2047 break;
2048 case IEEE80211_STYPE_DISASSOC:
f698d856 2049 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2050 break;
2051 }
2052
2053 kfree_skb(skb);
2054}
2055
2056
f698d856 2057static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2058{
f698d856 2059 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2060 int active = 0;
2061 struct sta_info *sta;
2062
d0709a65
JB		 2063 rcu_read_lock();
2064
2065 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2066 if (sta->sdata == sdata &&
f0706e82
JB		 2067 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2068 jiffies)) {
2069 active++;
2070 break;
2071 }
2072 }
d0709a65
JB		 2073
2074 rcu_read_unlock();
f0706e82
JB		 2075
2076 return active;
2077}
2078
2079
f698d856 2080static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2081 struct ieee80211_if_sta *ifsta)
2082{
2083 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2084
f698d856
JBG		 2085 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2086 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2087 return;
2088
137f9f46
AF		 2089 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2090 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2091 return;
2092
f0706e82 2093 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 2094 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 2095 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 2096}
2097
2098
9c6bd790 2099static void ieee80211_sta_timer(unsigned long data)
f0706e82 2100{
60f8b39c
JB		 2101 struct ieee80211_sub_if_data *sdata =
2102 (struct ieee80211_sub_if_data *) data;
2103 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2104 struct ieee80211_local *local = sdata->local;
f0706e82 2105
60f8b39c
JB		 2106 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2107 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2108}
2109
f698d856 2110static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2111 struct ieee80211_if_sta *ifsta)
2112{
f698d856 2113 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2114
2115 if (local->ops->reset_tsf) {
2116 /* Reset own TSF to allow time synchronization work. */
2117 local->ops->reset_tsf(local_to_hw(local));
2118 }
2119
2120 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2121
2122
2123 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2124 ifsta->auth_alg = WLAN_AUTH_OPEN;
2125 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2126 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2127 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2128 ifsta->auth_alg = WLAN_AUTH_LEAP;
2129 else
2130 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2131 ifsta->auth_transaction = -1;
d6f2da5b 2132 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2133 ifsta->assoc_scan_tries = 0;
9859b81e 2134 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2135 ifsta->auth_tries = 0;
2136 ifsta->assoc_tries = 0;
24e64622 2137 netif_tx_stop_all_queues(sdata->dev);
f698d856 2138 netif_carrier_off(sdata->dev);
f0706e82
JB		 2139}
2140
2141
f0706e82
JB		 2142static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2143 const char *ssid, int ssid_len)
2144{
2145 int tmp, hidden_ssid;
2146
48225709
MW		 2147 if (ssid_len == ifsta->ssid_len &&
2148 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2149 return 1;
2150
d6f2da5b 2151 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2152 return 0;
2153
2154 hidden_ssid = 1;
2155 tmp = ssid_len;
2156 while (tmp--) {
2157 if (ssid[tmp] != '\0') {
2158 hidden_ssid = 0;
2159 break;
2160 }
2161 }
2162
cb3da8cc 2163 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
f0706e82
JB		 2164 return 1;
2165
2166 if (ssid_len == 1 && ssid[0] == ' ')
2167 return 1;
2168
2169 return 0;
2170}
2171
f698d856 2172static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2173 struct ieee80211_if_sta *ifsta)
2174{
f698d856 2175 struct ieee80211_local *local = sdata->local;
c2b13452 2176 struct ieee80211_bss *bss;
8318d78a 2177 struct ieee80211_supported_band *sband;
f0706e82
JB		 2178 u8 bssid[ETH_ALEN], *pos;
2179 int i;
167ad6f7 2180 int ret;
f0706e82 2181
dfe67012
AF		 2182 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2183 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2184 } else {
2185 /* Generate random, not broadcast, locally administered BSSID. Mix in
2186 * own MAC address to make sure that devices that do not have proper
2187 * random number generator get different BSSID. */
2188 get_random_bytes(bssid, ETH_ALEN);
2189 for (i = 0; i < ETH_ALEN; i++)
2190 bssid[i] ^= sdata->dev->dev_addr[i];
2191 bssid[0] &= ~0x01;
2192 bssid[0] |= 0x02;
2193 }
f0706e82 2194
0c68ae26
JB		 2195 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2196 sdata->dev->name, bssid);
f0706e82 2197
98c8fccf 2198 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2199 local->hw.conf.channel->center_freq,
cffdd30d 2200 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2201 if (!bss)
2202 return -ENOMEM;
2203
8318d78a
JB		 2204 bss->band = local->hw.conf.channel->band;
2205 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2206
2207 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2208 local->hw.conf.beacon_int = 100;
f0706e82 2209 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2210 bss->last_update = jiffies;
2211 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2212
2213 if (sdata->default_key)
f0706e82 2214 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2215 else
f0706e82 2216 sdata->drop_unencrypted = 0;
988c0f72 2217
8318d78a 2218 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2219 pos = bss->supp_rates;
8318d78a
JB		 2220 for (i = 0; i < sband->n_bitrates; i++) {
2221 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2222 *pos++ = (u8) (rate / 5);
2223 }
2224
f698d856 2225 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2226 ieee80211_rx_bss_put(local, bss);
167ad6f7 2227 return ret;
f0706e82
JB		 2228}
2229
2230
f698d856 2231static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2232 struct ieee80211_if_sta *ifsta)
2233{
f698d856 2234 struct ieee80211_local *local = sdata->local;
c2b13452 2235 struct ieee80211_bss *bss;
f0706e82
JB		 2236 int found = 0;
2237 u8 bssid[ETH_ALEN];
2238 int active_ibss;
2239
2240 if (ifsta->ssid_len == 0)
2241 return -EINVAL;
2242
f698d856 2243 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2244#ifdef CONFIG_MAC80211_IBSS_DEBUG
2245 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2246 sdata->dev->name, active_ibss);
f0706e82 2247#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2248 spin_lock_bh(&local->bss_lock);
2249 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2250 if (ifsta->ssid_len != bss->ssid_len ||
2251 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2252 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2253 continue;
dfe67012
AF		 2254 if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
2255 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
2256 continue;
f0706e82 2257#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2258 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB		 2259#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2260 memcpy(bssid, bss->bssid, ETH_ALEN);
2261 found = 1;
2262 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2263 break;
2264 }
c2b13452 2265 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2266
2267#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2268 if (found)
0c68ae26
JB		 2269 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2270 "%pM\n", bssid, ifsta->bssid);
f0706e82 2271#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb 2272
dfe67012
AF		 2273 if (found &&
2274 ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2275 memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
167ad6f7 2276 int ret;
80693ceb
DD		 2277 int search_freq;
2278
2279 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2280 search_freq = bss->freq;
2281 else
2282 search_freq = local->hw.conf.channel->center_freq;
2283
f698d856 2284 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2285 ifsta->ssid, ifsta->ssid_len);
2286 if (!bss)
2287 goto dont_join;
2288
0c68ae26 2289 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2290 " based on configured SSID\n",
0c68ae26 2291 sdata->dev->name, bssid);
f698d856 2292 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2293 ieee80211_rx_bss_put(local, bss);
167ad6f7 2294 return ret;
f0706e82 2295 }
80693ceb
DD		 2296
2297dont_join:
f0706e82
JB		 2298#ifdef CONFIG_MAC80211_IBSS_DEBUG
2299 printk(KERN_DEBUG " did not try to join ibss\n");
2300#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2301
2302 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2303 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2304 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2305 mod_timer(&ifsta->timer, jiffies +
2306 IEEE80211_IBSS_MERGE_INTERVAL);
2307 } else if (time_after(jiffies, local->last_scan_completed +
2308 IEEE80211_SCAN_INTERVAL)) {
2309 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2310 "join\n", sdata->dev->name);
c2b13452 2311 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2312 ifsta->ssid_len);
48c2fc59 2313 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2314 int interval = IEEE80211_SCAN_INTERVAL;
2315
2316 if (time_after(jiffies, ifsta->ibss_join_req +
2317 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2318 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2319 (!(local->oper_channel->flags &
2320 IEEE80211_CHAN_NO_IBSS)))
f698d856 2321 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2322 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2323 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2324 " %d MHz\n", sdata->dev->name,
8318d78a 2325 local->hw.conf.channel->center_freq);
f0706e82
JB		 2326 }
2327
2328 /* No IBSS found - decrease scan interval and continue
2329 * scanning. */
2330 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2331 }
2332
48c2fc59 2333 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2334 mod_timer(&ifsta->timer, jiffies + interval);
2335 return 0;
2336 }
2337
2338 return 0;
2339}
2340
2341
9c6bd790
JB		 2342static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2343 struct ieee80211_if_sta *ifsta)
f0706e82 2344{
9c6bd790 2345 struct ieee80211_local *local = sdata->local;
c2b13452 2346 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2347 int top_rssi = 0, freq;
f0706e82 2348
c2b13452 2349 spin_lock_bh(&local->bss_lock);
9c6bd790 2350 freq = local->oper_channel->center_freq;
c2b13452 2351 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2352 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2353 continue;
f0706e82 2354
9c6bd790
JB		 2355 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2356 IEEE80211_STA_AUTO_BSSID_SEL |
2357 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2358 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2359 !!sdata->default_key))
2360 continue;
f0706e82 2361
9c6bd790
JB		 2362 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2363 bss->freq != freq)
2364 continue;
9d139c81 2365
9c6bd790
JB		 2366 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2367 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2368 continue;
f0706e82 2369
9c6bd790
JB		 2370 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2371 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2372 continue;
9d139c81 2373
9c6bd790
JB		 2374 if (!selected || top_rssi < bss->signal) {
2375 selected = bss;
2376 top_rssi = bss->signal;
2377 }
f0706e82 2378 }
9c6bd790
JB		 2379 if (selected)
2380 atomic_inc(&selected->users);
c2b13452 2381 spin_unlock_bh(&local->bss_lock);
9d139c81 2382
9c6bd790
JB		 2383 if (selected) {
2384 ieee80211_set_freq(sdata, selected->freq);
2385 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2386 ieee80211_sta_set_ssid(sdata, selected->ssid,
2387 selected->ssid_len);
2388 ieee80211_sta_set_bssid(sdata, selected->bssid);
2389 ieee80211_sta_def_wmm_params(sdata, selected);
fdfacf0a
JM		 2390 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2391 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2392 else
2393 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2394
9c6bd790
JB		 2395 /* Send out direct probe if no probe resp was received or
2396 * the one we have is outdated
2397 */
2398 if (!selected->last_probe_resp ||
2399 time_after(jiffies, selected->last_probe_resp
2400 + IEEE80211_SCAN_RESULT_EXPIRE))
2401 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2402 else
2403 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2404
9c6bd790
JB		 2405 ieee80211_rx_bss_put(local, selected);
2406 ieee80211_sta_reset_auth(sdata, ifsta);
2407 return 0;
2408 } else {
2409 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2410 ifsta->assoc_scan_tries++;
2411 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2412 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2413 else
c2b13452 2414 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2415 ifsta->ssid_len);
2416 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2417 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2418 } else
2419 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2420 }
2421 return -1;
2422}
2423
2424
2425static void ieee80211_sta_work(struct work_struct *work)
2426{
2427 struct ieee80211_sub_if_data *sdata =
2428 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2429 struct ieee80211_local *local = sdata->local;
2430 struct ieee80211_if_sta *ifsta;
2431 struct sk_buff *skb;
2432
2433 if (!netif_running(sdata->dev))
2434 return;
2435
c2b13452 2436 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2437 return;
2438
05c914fe
JB		 2439 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2440 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2441 return;
f0706e82
JB		 2442 ifsta = &sdata->u.sta;
2443
9c6bd790
JB		 2444 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2445 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2446
2447 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2448 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2449 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2450 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2451 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2452 ifsta->scan_ssid_len);
9c6bd790 2453 return;
f0706e82
JB		 2454 }
2455
9c6bd790
JB		 2456 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2457 if (ieee80211_sta_config_auth(sdata, ifsta))
2458 return;
2459 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2460 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2461 return;
d6f2da5b 2462
9c6bd790
JB		 2463 switch (ifsta->state) {
2464 case IEEE80211_STA_MLME_DISABLED:
2465 break;
2466 case IEEE80211_STA_MLME_DIRECT_PROBE:
2467 ieee80211_direct_probe(sdata, ifsta);
2468 break;
2469 case IEEE80211_STA_MLME_AUTHENTICATE:
2470 ieee80211_authenticate(sdata, ifsta);
2471 break;
2472 case IEEE80211_STA_MLME_ASSOCIATE:
2473 ieee80211_associate(sdata, ifsta);
2474 break;
2475 case IEEE80211_STA_MLME_ASSOCIATED:
2476 ieee80211_associated(sdata, ifsta);
2477 break;
2478 case IEEE80211_STA_MLME_IBSS_SEARCH:
2479 ieee80211_sta_find_ibss(sdata, ifsta);
2480 break;
2481 case IEEE80211_STA_MLME_IBSS_JOINED:
2482 ieee80211_sta_merge_ibss(sdata, ifsta);
2483 break;
2484 default:
2485 WARN_ON(1);
2486 break;
2487 }
2488
2489 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2490 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2491 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2492
2493 ieee80211_set_disassoc(sdata, ifsta, false, true,
2494 WLAN_REASON_UNSPECIFIED);
2495 }
f0706e82
JB		 2496}
2497
9c6bd790
JB		 2498static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2499{
05c914fe 2500 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2501 queue_work(sdata->local->hw.workqueue,
2502 &sdata->u.sta.work);
2503}
f0706e82 2504
9c6bd790
JB		 2505/* interface setup */
2506void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2507{
9c6bd790 2508 struct ieee80211_if_sta *ifsta;
988c0f72 2509
9c6bd790
JB		 2510 ifsta = &sdata->u.sta;
2511 INIT_WORK(&ifsta->work, ieee80211_sta_work);
c481ec97 2512 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
9c6bd790 2513 setup_timer(&ifsta->timer, ieee80211_sta_timer,
c481ec97
S		 2514 (unsigned long) sdata);
2515 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790
JB		 2516 (unsigned long) sdata);
2517 skb_queue_head_init(&ifsta->skb_queue);
2518
2519 ifsta->capab = WLAN_CAPABILITY_ESS;
2520 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2521 IEEE80211_AUTH_ALG_SHARED_KEY;
2522 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2523 IEEE80211_STA_AUTO_BSSID_SEL |
2524 IEEE80211_STA_AUTO_CHANNEL_SEL;
2525 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2526 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2527}
2528
9c6bd790
JB		 2529/*
2530 * Add a new IBSS station, will also be called by the RX code when,
2531 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2532 * must be callable in atomic context.
2533 */
f698d856 2534struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
881d948c 2535 u8 *bssid,u8 *addr, u32 supp_rates)
f0706e82 2536{
f698d856 2537 struct ieee80211_local *local = sdata->local;
f0706e82 2538 struct sta_info *sta;
87291c02 2539 int band = local->hw.conf.channel->band;
f0706e82
JB		 2540
2541 /* TODO: Could consider removing the least recently used entry and
2542 * allow new one to be added. */
2543 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2544 if (net_ratelimit()) {
2545 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2546 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2547 }
2548 return NULL;
2549 }
2550
1e188637 2551 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2552 return NULL;
2553
f4ea83dd 2554#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2555 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2556 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2557#endif
f0706e82 2558
73651ee6
JB		 2559 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2560 if (!sta)
f0706e82
JB		 2561 return NULL;
2562
07346f81 2563 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2564
8e1535d5 2565 /* make sure mandatory rates are always added */
323ce79a 2566 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2567 ieee80211_mandatory_rates(local, band);
f0706e82 2568
4b7679a5 2569 rate_control_rate_init(sta);
f0706e82 2570
93e5deb1 2571 if (sta_info_insert(sta))
73651ee6 2572 return NULL;
73651ee6 2573
d0709a65 2574 return sta;
f0706e82
JB		 2575}
2576
9c6bd790
JB		 2577/* configuration hooks */
2578void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2579 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2580{
2581 struct ieee80211_local *local = sdata->local;
60f8b39c 2582
05c914fe 2583 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2584 return;
60f8b39c 2585
9c6bd790
JB		 2586 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2587 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2588 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2589 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2590
9c6bd790
JB		 2591 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2592 ieee80211_set_disassoc(sdata, ifsta, true, true,
2593 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2594
9c6bd790
JB		 2595 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2596 queue_work(local->hw.workqueue, &ifsta->work);
2597 }
2598}
60f8b39c 2599
9c6bd790
JB		 2600int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2601{
2602 struct ieee80211_if_sta *ifsta;
60f8b39c 2603
9c6bd790
JB		 2604 if (len > IEEE80211_MAX_SSID_LEN)
2605 return -EINVAL;
2606
2607 ifsta = &sdata->u.sta;
2608
2609 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2610 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2611 memcpy(ifsta->ssid, ssid, len);
2612 ifsta->ssid_len = len;
60f8b39c 2613 }
60f8b39c 2614
dfe67012
AF		 2615 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2616
9c6bd790
JB		 2617 if (len)
2618 ifsta->flags |= IEEE80211_STA_SSID_SET;
2619 else
2620 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2621
dfe67012 2622 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2623 ifsta->ibss_join_req = jiffies;
2624 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2625 return ieee80211_sta_find_ibss(sdata, ifsta);
2626 }
2627
2628 return 0;
2629}
2630
2631int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2632{
2633 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2634 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2635 *len = ifsta->ssid_len;
2636 return 0;
2637}
2638
2639int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2640{
2641 struct ieee80211_if_sta *ifsta;
9c6bd790
JB		 2642
2643 ifsta = &sdata->u.sta;
2644
dfe67012
AF		 2645 if (is_valid_ether_addr(bssid)) {
2646 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2647 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2648 } else {
2649 memset(ifsta->bssid, 0, ETH_ALEN);
2650 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2651 }
2652
2653 if (netif_running(sdata->dev)) {
2654 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 2655 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2656 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 2657 }
2658 }
60f8b39c 2659
dfe67012 2660 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
9c6bd790
JB		 2661}
2662
2663int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2664{
2665 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2666
2667 kfree(ifsta->extra_ie);
2668 if (len == 0) {
2669 ifsta->extra_ie = NULL;
2670 ifsta->extra_ie_len = 0;
60f8b39c 2671 return 0;
60f8b39c 2672 }
9c6bd790
JB		 2673 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2674 if (!ifsta->extra_ie) {
2675 ifsta->extra_ie_len = 0;
2676 return -ENOMEM;
2677 }
2678 memcpy(ifsta->extra_ie, ie, len);
2679 ifsta->extra_ie_len = len;
2680 return 0;
60f8b39c
JB		 2681}
2682
f698d856 2683int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2684{
f0706e82
JB		 2685 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2686
f4ea83dd 2687 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2688 sdata->dev->name, reason);
f0706e82 2689
05c914fe
JB		 2690 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2691 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2692 return -EINVAL;
2693
aa458d17 2694 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2695 return 0;
2696}
2697
f698d856 2698int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2699{
f0706e82
JB		 2700 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2701
f4ea83dd 2702 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2703 sdata->dev->name, reason);
f0706e82 2704
05c914fe 2705 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2706 return -EINVAL;
2707
d6f2da5b 2708 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2709 return -1;
2710
aa458d17 2711 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2712 return 0;
2713}
84363e6e 2714
9c6bd790
JB		 2715/* scan finished notification */
2716void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2717{
2718 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2719 struct ieee80211_if_sta *ifsta;
2720
05c914fe 2721 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2722 ifsta = &sdata->u.sta;
2723 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2724 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
2725 !ieee80211_sta_active_ibss(sdata)))
2726 ieee80211_sta_find_ibss(sdata, ifsta);
2727 }
2728
2729 /* Restart STA timers */
2730 rcu_read_lock();
2731 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2732 ieee80211_restart_sta_timer(sdata);
2733 rcu_read_unlock();
2734}
520eb820
KV		 2735
2736void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2737{
2738 struct ieee80211_local *local =
2739 container_of(work, struct ieee80211_local,
2740 dynamic_ps_disable_work);
2741
2742 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2743 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2744 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2745 }
2746
2747 ieee80211_wake_queues_by_reason(&local->hw,
2748 IEEE80211_QUEUE_STOP_REASON_PS);
2749}
2750
2751void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2752{
2753 struct ieee80211_local *local =
2754 container_of(work, struct ieee80211_local,
2755 dynamic_ps_enable_work);
a97b77b9 2756 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 2757
2758 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2759 return;
2760
4be8c387
JB		 2761 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2762 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2763
4be8c387 2764 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2765 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2766}
2767
2768void ieee80211_dynamic_ps_timer(unsigned long data)
2769{
2770 struct ieee80211_local *local = (void *) data;
2771
2772 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2773}
Linux kernel - Deliverables
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