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ath9k: Add retry counters to rate control debug file
[mirror_ubuntu-jammy-kernel.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;
d43e8786 1045 bool remove_bss = false;
f0706e82
JB		 1046
1047 /* TODO: start monitoring current AP signal quality and number of
1048 * missed beacons. Scan other channels every now and then and search
1049 * for better APs. */
1050 /* TODO: remove expired BSSes */
1051
48c2fc59 1052 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1053
d0709a65
JB		 1054 rcu_read_lock();
1055
f0706e82
JB		 1056 sta = sta_info_get(local, ifsta->bssid);
1057 if (!sta) {
0c68ae26
JB		 1058 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1059 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 1060 disassoc = 1;
1061 } else {
1062 disassoc = 0;
1063 if (time_after(jiffies,
1064 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1065 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1066 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 1067 "current AP %pM - assume out of "
f0706e82 1068 "range\n",
0c68ae26 1069 sdata->dev->name, ifsta->bssid);
f0706e82 1070 disassoc = 1;
d43e8786 1071 remove_bss = true;
d6f2da5b 1072 } else
f698d856 1073 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 1074 ifsta->ssid,
1075 ifsta->ssid_len);
d6f2da5b 1076 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1077 } else {
d6f2da5b 1078 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1079 if (time_after(jiffies, ifsta->last_probe +
1080 IEEE80211_PROBE_INTERVAL)) {
1081 ifsta->last_probe = jiffies;
f698d856 1082 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1083 ifsta->ssid,
1084 ifsta->ssid_len);
1085 }
1086 }
f0706e82 1087 }
d0709a65
JB		 1088
1089 rcu_read_unlock();
1090
d43e8786 1091 if (disassoc) {
60f8b39c
JB		 1092 ieee80211_set_disassoc(sdata, ifsta, true, true,
1093 WLAN_REASON_PREV_AUTH_NOT_VALID);
d43e8786
VT		 1094 if (remove_bss) {
1095 struct ieee80211_bss *bss;
1096
1097 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1098 local->hw.conf.channel->center_freq,
1099 ifsta->ssid, ifsta->ssid_len);
1100 if (bss) {
1101 atomic_dec(&bss->users);
1102 ieee80211_rx_bss_put(local, bss);
1103 }
1104 }
1105 } else {
60f8b39c
JB		 1106 mod_timer(&ifsta->timer, jiffies +
1107 IEEE80211_MONITORING_INTERVAL);
d43e8786 1108 }
f0706e82
JB		 1109}
1110
1111
f698d856 1112static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1113 struct ieee80211_if_sta *ifsta)
1114{
f698d856 1115 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1116 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1117 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1118}
1119
1120
f698d856 1121static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1122 struct ieee80211_if_sta *ifsta,
1123 struct ieee80211_mgmt *mgmt,
1124 size_t len)
1125{
1126 u8 *pos;
1127 struct ieee802_11_elems elems;
1128
f0706e82 1129 pos = mgmt->u.auth.variable;
67a4cce4 1130 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1131 if (!elems.challenge)
f0706e82 1132 return;
f698d856 1133 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1134 elems.challenge_len + 2, 1);
1135}
1136
f698d856 1137static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1138 struct ieee80211_if_sta *ifsta,
1139 struct ieee80211_mgmt *mgmt,
1140 size_t len)
1141{
f0706e82
JB		 1142 u16 auth_alg, auth_transaction, status_code;
1143
48c2fc59 1144 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1145 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1146 return;
f0706e82 1147
f4ea83dd 1148 if (len < 24 + 6)
f0706e82 1149 return;
f0706e82 1150
05c914fe 1151 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1152 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1153 return;
f0706e82 1154
05c914fe 1155 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1156 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1157 return;
f0706e82
JB		 1158
1159 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1160 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1161 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1162
05c914fe 1163 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1164 /*
1165 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1166 * networks and most implementations do not seem to use it.
1167 * However, try to reply to authentication attempts if someone
1168 * has actually implemented this.
135a2110 1169 */
f4ea83dd 1170 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1171 return;
f698d856 1172 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1173 }
1174
1175 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1176 auth_transaction != ifsta->auth_transaction)
f0706e82 1177 return;
f0706e82
JB		 1178
1179 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1180 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1181 u8 algs[3];
1182 const int num_algs = ARRAY_SIZE(algs);
1183 int i, pos;
1184 algs[0] = algs[1] = algs[2] = 0xff;
1185 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1186 algs[0] = WLAN_AUTH_OPEN;
1187 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1188 algs[1] = WLAN_AUTH_SHARED_KEY;
1189 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1190 algs[2] = WLAN_AUTH_LEAP;
1191 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1192 pos = 0;
1193 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1194 pos = 1;
1195 else
1196 pos = 2;
1197 for (i = 0; i < num_algs; i++) {
1198 pos++;
1199 if (pos >= num_algs)
1200 pos = 0;
1201 if (algs[pos] == ifsta->auth_alg ||
1202 algs[pos] == 0xff)
1203 continue;
1204 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1205 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1206 continue;
1207 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1208 break;
1209 }
1210 }
1211 return;
1212 }
1213
1214 switch (ifsta->auth_alg) {
1215 case WLAN_AUTH_OPEN:
1216 case WLAN_AUTH_LEAP:
f698d856 1217 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1218 break;
1219 case WLAN_AUTH_SHARED_KEY:
1220 if (ifsta->auth_transaction == 4)
f698d856 1221 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1222 else
f698d856 1223 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1224 break;
1225 }
1226}
1227
1228
f698d856 1229static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1230 struct ieee80211_if_sta *ifsta,
1231 struct ieee80211_mgmt *mgmt,
1232 size_t len)
1233{
1234 u16 reason_code;
1235
f4ea83dd 1236 if (len < 24 + 2)
f0706e82 1237 return;
f0706e82 1238
f4ea83dd 1239 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1240 return;
f0706e82
JB		 1241
1242 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1243
988c0f72 1244 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1245 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1246 sdata->dev->name, reason_code);
f0706e82 1247
48c2fc59
TW		 1248 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1249 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1250 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1251 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1252 mod_timer(&ifsta->timer, jiffies +
1253 IEEE80211_RETRY_AUTH_INTERVAL);
1254 }
1255
aa458d17 1256 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1257 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1258}
1259
1260
f698d856 1261static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1262 struct ieee80211_if_sta *ifsta,
1263 struct ieee80211_mgmt *mgmt,
1264 size_t len)
1265{
1266 u16 reason_code;
1267
f4ea83dd 1268 if (len < 24 + 2)
f0706e82 1269 return;
f0706e82 1270
f4ea83dd 1271 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1272 return;
f0706e82
JB		 1273
1274 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1275
d6f2da5b 1276 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1277 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1278 sdata->dev->name, reason_code);
f0706e82 1279
48c2fc59
TW		 1280 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1281 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1282 mod_timer(&ifsta->timer, jiffies +
1283 IEEE80211_RETRY_AUTH_INTERVAL);
1284 }
1285
5925d976 1286 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB		 1287}
1288
1289
471b3efd 1290static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1291 struct ieee80211_if_sta *ifsta,
1292 struct ieee80211_mgmt *mgmt,
1293 size_t len,
1294 int reassoc)
1295{
471b3efd 1296 struct ieee80211_local *local = sdata->local;
8318d78a 1297 struct ieee80211_supported_band *sband;
f0706e82 1298 struct sta_info *sta;
881d948c 1299 u32 rates, basic_rates;
f0706e82
JB		 1300 u16 capab_info, status_code, aid;
1301 struct ieee802_11_elems elems;
bda3933a 1302 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1303 u8 *pos;
ae5eb026 1304 u32 changed = 0;
f0706e82 1305 int i, j;
ddf4ac53 1306 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1307 u16 ap_ht_cap_flags;
f0706e82
JB		 1308
1309 /* AssocResp and ReassocResp have identical structure, so process both
1310 * of them in this function. */
1311
48c2fc59 1312 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1313 return;
f0706e82 1314
f4ea83dd 1315 if (len < 24 + 6)
f0706e82 1316 return;
f0706e82 1317
f4ea83dd 1318 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1319 return;
f0706e82
JB		 1320
1321 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1322 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1323 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1324
0c68ae26 1325 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1326 "status=%d aid=%d)\n",
0c68ae26 1327 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1328 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1329
63a5ab82
JM		 1330 pos = mgmt->u.assoc_resp.variable;
1331 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1332
1333 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1334 elems.timeout_int && elems.timeout_int_len == 5 &&
1335 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1336 u32 tu, ms;
f797eb7e 1337 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1338 ms = tu * 1024 / 1000;
1339 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1340 "comeback duration %u TU (%u ms)\n",
1341 sdata->dev->name, tu, ms);
1342 if (ms > IEEE80211_ASSOC_TIMEOUT)
1343 mod_timer(&ifsta->timer,
1344 jiffies + msecs_to_jiffies(ms));
1345 return;
1346 }
1347
f0706e82
JB		 1348 if (status_code != WLAN_STATUS_SUCCESS) {
1349 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1350 sdata->dev->name, status_code);
8a69aa93
DD		 1351 /* if this was a reassociation, ensure we try a "full"
1352 * association next time. This works around some broken APs
1353 * which do not correctly reject reassociation requests. */
d6f2da5b 1354 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1355 return;
1356 }
1357
1dd84aa2
JB		 1358 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1359 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1360 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1361 aid &= ~(BIT(15) | BIT(14));
1362
f0706e82
JB		 1363 if (!elems.supp_rates) {
1364 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1365 sdata->dev->name);
f0706e82
JB		 1366 return;
1367 }
1368
f698d856 1369 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1370 ifsta->aid = aid;
1371 ifsta->ap_capab = capab_info;
1372
1373 kfree(ifsta->assocresp_ies);
1374 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1375 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1376 if (ifsta->assocresp_ies)
1377 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1378
d0709a65
JB		 1379 rcu_read_lock();
1380
f0706e82
JB		 1381 /* Add STA entry for the AP */
1382 sta = sta_info_get(local, ifsta->bssid);
1383 if (!sta) {
c2b13452 1384 struct ieee80211_bss *bss;
ddf4ac53
JB		 1385
1386 newsta = true;
d0709a65 1387
73651ee6
JB		 1388 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1389 if (!sta) {
1390 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1391 " the AP\n", sdata->dev->name);
d0709a65 1392 rcu_read_unlock();
f0706e82
JB		 1393 return;
1394 }
60f8b39c
JB		 1395 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1396 local->hw.conf.channel->center_freq,
1397 ifsta->ssid, ifsta->ssid_len);
1398 if (bss) {
1399 sta->last_signal = bss->signal;
1400 sta->last_qual = bss->qual;
1401 sta->last_noise = bss->noise;
1402 ieee80211_rx_bss_put(local, bss);
1403 }
f709fc69 1404
60f8b39c
JB		 1405 /* update new sta with its last rx activity */
1406 sta->last_rx = jiffies;
f709fc69 1407 }
f709fc69 1408
60f8b39c
JB		 1409 /*
1410 * FIXME: Do we really need to update the sta_info's information here?
1411 * We already know about the AP (we found it in our list) so it
1412 * should already be filled with the right info, no?
1413 * As is stands, all this is racy because typically we assume
1414 * the information that is filled in here (except flags) doesn't
1415 * change while a STA structure is alive. As such, it should move
1416 * to between the sta_info_alloc() and sta_info_insert() above.
1417 */
f709fc69 1418
60f8b39c
JB		 1419 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1420 WLAN_STA_AUTHORIZED);
05e5e883 1421
60f8b39c
JB		 1422 rates = 0;
1423 basic_rates = 0;
1424 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1425
60f8b39c
JB		 1426 for (i = 0; i < elems.supp_rates_len; i++) {
1427 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1428 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1429
60f8b39c
JB		 1430 if (rate > 110)
1431 have_higher_than_11mbit = true;
1432
1433 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1434 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1435 rates |= BIT(j);
d61272cb
TW		 1436 if (is_basic)
1437 basic_rates |= BIT(j);
1438 break;
1439 }
f709fc69 1440 }
f709fc69
LCC		 1441 }
1442
60f8b39c
JB		 1443 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1444 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1445 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1446
60f8b39c
JB		 1447 if (rate > 110)
1448 have_higher_than_11mbit = true;
f0706e82 1449
60f8b39c 1450 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1451 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1452 rates |= BIT(j);
d61272cb
TW		 1453 if (is_basic)
1454 basic_rates |= BIT(j);
1455 break;
1456 }
60f8b39c 1457 }
1ebebea8 1458 }
f0706e82 1459
323ce79a 1460 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1461 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1462
1463 /* cf. IEEE 802.11 9.2.12 */
1464 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1465 have_higher_than_11mbit)
1466 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1467 else
1468 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1469
ae5eb026
JB		 1470 if (elems.ht_cap_elem)
1471 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1472 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1473
1474 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1475
4b7679a5 1476 rate_control_rate_init(sta);
f0706e82 1477
5394af4d
JM		 1478 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1479 set_sta_flags(sta, WLAN_STA_MFP);
1480
ddf4ac53 1481 if (elems.wmm_param)
60f8b39c 1482 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1483
1484 if (newsta) {
1485 int err = sta_info_insert(sta);
1486 if (err) {
1487 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1488 " the AP (error %d)\n", sdata->dev->name, err);
1489 rcu_read_unlock();
1490 return;
1491 }
1492 }
1493
1494 rcu_read_unlock();
1495
1496 if (elems.wmm_param)
60f8b39c
JB		 1497 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1498 elems.wmm_param_len);
f0706e82 1499
ae5eb026
JB		 1500 if (elems.ht_info_elem && elems.wmm_param &&
1501 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1502 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1503 ap_ht_cap_flags);
1504
60f8b39c
JB		 1505 /* set AID and assoc capability,
1506 * ieee80211_set_associated() will tell the driver */
1507 bss_conf->aid = aid;
1508 bss_conf->assoc_capability = capab_info;
ae5eb026 1509 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1510
60f8b39c 1511 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1512}
1513
1514
f698d856 1515static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a 1516 struct ieee80211_if_sta *ifsta,
c2b13452 1517 struct ieee80211_bss *bss)
a607268a 1518{
f698d856 1519 struct ieee80211_local *local = sdata->local;
c4e3a584 1520 int res = 0, rates, i, j;
a607268a
BR		 1521 struct sk_buff *skb;
1522 struct ieee80211_mgmt *mgmt;
a607268a 1523 u8 *pos;
a607268a 1524 struct ieee80211_supported_band *sband;
507b06d0 1525 union iwreq_data wrqu;
a607268a 1526
c4e3a584
AF		 1527 if (local->ops->reset_tsf) {
1528 /* Reset own TSF to allow time synchronization work. */
1529 local->ops->reset_tsf(local_to_hw(local));
1530 }
1531
1532 if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
1533 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) == 0)
1534 return res;
1535
9aed3cc1
JM		 1536 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1537 sdata->u.sta.ie_proberesp_len);
e2ef12d3
RR		 1538 if (!skb) {
1539 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1540 "response\n", sdata->dev->name);
1541 return -ENOMEM;
1542 }
1543
a607268a
BR		 1544 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1545
c4e3a584
AF		 1546 if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
1547 /* Remove possible STA entries from other IBSS networks. */
1548 sta_info_flush_delayed(sdata);
a607268a 1549 }
c4e3a584 1550
a607268a 1551 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1552 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1553 if (res)
1554 return res;
1555
1556 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1557
a607268a
BR		 1558 sdata->drop_unencrypted = bss->capability &
1559 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1560
f698d856 1561 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1562
be038b37
AK		 1563 if (res)
1564 return res;
a607268a 1565
9d139c81 1566 /* Build IBSS probe response */
a607268a 1567
e2ef12d3 1568 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1569
e2ef12d3
RR		 1570 mgmt = (struct ieee80211_mgmt *)
1571 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1572 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1573 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1574 IEEE80211_STYPE_PROBE_RESP);
1575 memset(mgmt->da, 0xff, ETH_ALEN);
1576 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1577 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1578 mgmt->u.beacon.beacon_int =
1579 cpu_to_le16(local->hw.conf.beacon_int);
1580 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
1581 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
a607268a 1582
e2ef12d3
RR		 1583 pos = skb_put(skb, 2 + ifsta->ssid_len);
1584 *pos++ = WLAN_EID_SSID;
1585 *pos++ = ifsta->ssid_len;
1586 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1587
e2ef12d3
RR		 1588 rates = bss->supp_rates_len;
1589 if (rates > 8)
1590 rates = 8;
1591 pos = skb_put(skb, 2 + rates);
1592 *pos++ = WLAN_EID_SUPP_RATES;
1593 *pos++ = rates;
1594 memcpy(pos, bss->supp_rates, rates);
1595
1596 if (bss->band == IEEE80211_BAND_2GHZ) {
1597 pos = skb_put(skb, 2 + 1);
1598 *pos++ = WLAN_EID_DS_PARAMS;
1599 *pos++ = 1;
1600 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1601 }
a607268a 1602
e2ef12d3
RR		 1603 pos = skb_put(skb, 2 + 2);
1604 *pos++ = WLAN_EID_IBSS_PARAMS;
1605 *pos++ = 2;
1606 /* FIX: set ATIM window based on scan results */
1607 *pos++ = 0;
1608 *pos++ = 0;
e039fa4a 1609
e2ef12d3
RR		 1610 if (bss->supp_rates_len > 8) {
1611 rates = bss->supp_rates_len - 8;
1612 pos = skb_put(skb, 2 + rates);
1613 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1614 *pos++ = rates;
1615 memcpy(pos, &bss->supp_rates[8], rates);
9d139c81 1616 }
a607268a 1617
9aed3cc1
JM		 1618 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1619 sdata->u.sta.ie_proberesp_len);
1620
e2ef12d3
RR		 1621 ifsta->probe_resp = skb;
1622
078e1e60
JB		 1623 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1624 IEEE80211_IFCC_BEACON_ENABLED);
e2ef12d3
RR		 1625
1626
9d139c81
JB		 1627 rates = 0;
1628 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1629 for (i = 0; i < bss->supp_rates_len; i++) {
1630 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1631 for (j = 0; j < sband->n_bitrates; j++)
1632 if (sband->bitrates[j].bitrate == bitrate)
1633 rates |= BIT(j);
a607268a 1634 }
9d139c81
JB		 1635 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1636
b079ada7 1637 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1638
dfe67012 1639 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
48c2fc59 1640 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1641 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1642
4492bea6
EG		 1643 ieee80211_led_assoc(local, true);
1644
507b06d0
DW		 1645 memset(&wrqu, 0, sizeof(wrqu));
1646 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1647 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1648
1649 return res;
1650}
1651
98c8fccf
JB		 1652static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1653 struct ieee80211_mgmt *mgmt,
1654 size_t len,
1655 struct ieee80211_rx_status *rx_status,
1656 struct ieee802_11_elems *elems,
1657 bool beacon)
1658{
1659 struct ieee80211_local *local = sdata->local;
1660 int freq;
c2b13452 1661 struct ieee80211_bss *bss;
98c8fccf
JB		 1662 struct sta_info *sta;
1663 struct ieee80211_channel *channel;
1664 u64 beacon_timestamp, rx_timestamp;
881d948c 1665 u32 supp_rates = 0;
98c8fccf 1666 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 1667
1668 if (elems->ds_params && elems->ds_params_len == 1)
1669 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1670 else
1671 freq = rx_status->freq;
1672
1673 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1674
1675 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1676 return;
1677
05c914fe 1678 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1679 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1680 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1681
1682 rcu_read_lock();
1683
1684 sta = sta_info_get(local, mgmt->sa);
1685 if (sta) {
881d948c 1686 u32 prev_rates;
98c8fccf 1687
323ce79a 1688 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1689 /* make sure mandatory rates are always added */
323ce79a 1690 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1691 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1692
1693#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1694 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1695 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1696 "for %pM based on beacon info (0x%llx | "
98c8fccf 1697 "0x%llx -> 0x%llx)\n",
17741cdc 1698 sdata->dev->name,
0c68ae26 1699 sta->sta.addr,
98c8fccf
JB		 1700 (unsigned long long) prev_rates,
1701 (unsigned long long) supp_rates,
323ce79a 1702 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1703#endif
1704 } else {
ab1f5c0b 1705 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB		 1706 }
1707
1708 rcu_read_unlock();
1709 }
1710
1711 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1712 freq, beacon);
1713 if (!bss)
1714 return;
1715
c481ec97
S		 1716 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1717 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1718 struct ieee80211_channel_sw_ie *sw_elem =
1719 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1720 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1721 }
1722
98c8fccf
JB		 1723 /* was just updated in ieee80211_bss_info_update */
1724 beacon_timestamp = bss->timestamp;
1725
30b89b0f
JB		 1726 /*
1727 * In STA mode, the remaining parameters should not be overridden
1728 * by beacons because they're not necessarily accurate there.
1729 */
05c914fe 1730 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1731 bss->last_probe_resp && beacon) {
3e122be0 1732 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1733 return;
1734 }
1735
9d9bf77d 1736 /* check if we need to merge IBSS */
05c914fe 1737 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
65f0e6a3 1738 (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
fba4a1e6 1739 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1740 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1741 elems->ssid_len == sdata->u.sta.ssid_len &&
1742 memcmp(elems->ssid, sdata->u.sta.ssid,
1743 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1744 if (rx_status->flag & RX_FLAG_TSFT) {
1745 /* in order for correct IBSS merging we need mactime
1746 *
1747 * since mactime is defined as the time the first data
1748 * symbol of the frame hits the PHY, and the timestamp
1749 * of the beacon is defined as "the time that the data
1750 * symbol containing the first bit of the timestamp is
1751 * transmitted to the PHY plus the transmitting STA’s
1752 * delays through its local PHY from the MAC-PHY
1753 * interface to its interface with the WM"
1754 * (802.11 11.1.2) - equals the time this bit arrives at
1755 * the receiver - we have to take into account the
1756 * offset between the two.
1757 * e.g: at 1 MBit that means mactime is 192 usec earlier
1758 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1759 */
0fb8ca45
JM		 1760 int rate;
1761 if (rx_status->flag & RX_FLAG_HT) {
1762 rate = 65; /* TODO: HT rates */
1763 } else {
1764 rate = local->hw.wiphy->bands[band]->
9d9bf77d 1765 bitrates[rx_status->rate_idx].bitrate;
0fb8ca45 1766 }
9d9bf77d
BR		 1767 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1768 } else if (local && local->ops && local->ops->get_tsf)
1769 /* second best option: get current TSF */
1770 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1771 else
1772 /* can't merge without knowing the TSF */
1773 rx_timestamp = -1LLU;
1774#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1775 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1776 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1777 mgmt->sa, mgmt->bssid,
9d9bf77d
BR		 1778 (unsigned long long)rx_timestamp,
1779 (unsigned long long)beacon_timestamp,
1780 (unsigned long long)(rx_timestamp - beacon_timestamp),
1781 jiffies);
1782#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1783 if (beacon_timestamp > rx_timestamp) {
576fdeae 1784#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd 1785 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB		 1786 "local TSF - IBSS merge with BSSID %pM\n",
1787 sdata->dev->name, mgmt->bssid);
fba4a1e6 1788#endif
f698d856 1789 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
ab1f5c0b 1790 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR		 1791 }
1792 }
1793
3e122be0 1794 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1795}
1796
1797
f698d856 1798static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1799 struct ieee80211_mgmt *mgmt,
1800 size_t len,
1801 struct ieee80211_rx_status *rx_status)
1802{
ae6a44e3
EK		 1803 size_t baselen;
1804 struct ieee802_11_elems elems;
9859b81e 1805 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1806
8e7cdbb6
TW		 1807 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1808 return; /* ignore ProbeResp to foreign address */
1809
ae6a44e3
EK		 1810 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1811 if (baselen > len)
1812 return;
1813
1814 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1815 &elems);
1816
98c8fccf 1817 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1818
1819 /* direct probe may be part of the association flow */
1820 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1821 &ifsta->request)) {
1822 printk(KERN_DEBUG "%s direct probe responded\n",
1823 sdata->dev->name);
1824 ieee80211_authenticate(sdata, ifsta);
1825 }
f0706e82
JB		 1826}
1827
1828
f698d856 1829static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1830 struct ieee80211_mgmt *mgmt,
1831 size_t len,
1832 struct ieee80211_rx_status *rx_status)
1833{
f0706e82 1834 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1835 size_t baselen;
1836 struct ieee802_11_elems elems;
f698d856 1837 struct ieee80211_local *local = sdata->local;
471b3efd 1838 u32 changed = 0;
a97b77b9 1839 bool erp_valid, directed_tim, is_mc = false;
7a5158ef 1840 u8 erp_value = 0;
f0706e82 1841
ae6a44e3
EK		 1842 /* Process beacon from the current BSS */
1843 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1844 if (baselen > len)
1845 return;
1846
1847 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1848
98c8fccf 1849 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1850
05c914fe 1851 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1852 return;
1853 ifsta = &sdata->u.sta;
1854
d6f2da5b 1855 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1856 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1857 return;
1858
c481ec97
S		 1859 if (rx_status->freq != local->hw.conf.channel->center_freq)
1860 return;
1861
fe3fa827
JB		 1862 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1863 elems.wmm_param_len);
1864
4be8c387
JB		 1865 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1866 local->hw.conf.flags & IEEE80211_CONF_PS) {
a97b77b9
VN		 1867 directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
1868
1869 if (directed_tim || is_mc) {
4be8c387
JB		 1870 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1871 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1872 ieee80211_send_nullfunc(local, sdata, 0);
a97b77b9
VN		 1873 }
1874 }
7a5158ef
JB		 1875
1876 if (elems.erp_info && elems.erp_info_len >= 1) {
1877 erp_valid = true;
1878 erp_value = elems.erp_info[0];
1879 } else {
1880 erp_valid = false;
50c4afb9 1881 }
7a5158ef
JB		 1882 changed |= ieee80211_handle_bss_capability(sdata,
1883 le16_to_cpu(mgmt->u.beacon.capab_info),
1884 erp_valid, erp_value);
f0706e82 1885
d3c990fb 1886
ae5eb026
JB		 1887 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1888 struct sta_info *sta;
1889 struct ieee80211_supported_band *sband;
1890 u16 ap_ht_cap_flags;
1891
1892 rcu_read_lock();
1893
1894 sta = sta_info_get(local, ifsta->bssid);
1895 if (!sta) {
1896 rcu_read_unlock();
1897 return;
1898 }
1899
1900 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1901
1902 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1903 elems.ht_cap_elem, &sta->sta.ht_cap);
1904
1905 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1906
1907 rcu_read_unlock();
1908
1909 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1910 ap_ht_cap_flags);
d3c990fb
RR		 1911 }
1912
3f2355cb
LR		 1913 if (elems.country_elem) {
1914 /* Note we are only reviewing this on beacons
1915 * for the BSSID we are associated to */
1916 regulatory_hint_11d(local->hw.wiphy,
1917 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1918
1919 /* TODO: IBSS also needs this */
1920 if (elems.pwr_constr_elem)
1921 ieee80211_handle_pwr_constr(sdata,
1922 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1923 elems.pwr_constr_elem,
1924 elems.pwr_constr_elem_len);
3f2355cb
LR		 1925 }
1926
471b3efd 1927 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1928}
1929
1930
f698d856 1931static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1932 struct ieee80211_if_sta *ifsta,
1933 struct ieee80211_mgmt *mgmt,
504a71e4 1934 size_t len)
f0706e82 1935{
f698d856 1936 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1937 int tx_last_beacon;
1938 struct sk_buff *skb;
1939 struct ieee80211_mgmt *resp;
1940 u8 *pos, *end;
1941
05c914fe 1942 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 1943 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 1944 len < 24 + 2 || !ifsta->probe_resp)
1945 return;
1946
1947 if (local->ops->tx_last_beacon)
1948 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1949 else
1950 tx_last_beacon = 1;
1951
1952#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1953 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
1954 " (tx_last_beacon=%d)\n",
1955 sdata->dev->name, mgmt->sa, mgmt->da,
1956 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 1957#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1958
1959 if (!tx_last_beacon)
1960 return;
1961
1962 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1963 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1964 return;
1965
1966 end = ((u8 *) mgmt) + len;
1967 pos = mgmt->u.probe_req.variable;
1968 if (pos[0] != WLAN_EID_SSID ||
1969 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 1970#ifdef CONFIG_MAC80211_IBSS_DEBUG
1971 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 1972 "from %pM\n",
1973 sdata->dev->name, mgmt->sa);
f4ea83dd 1974#endif
f0706e82
JB		 1975 return;
1976 }
1977 if (pos[1] != 0 &&
1978 (pos[1] != ifsta->ssid_len ||
1979 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1980 /* Ignore ProbeReq for foreign SSID */
1981 return;
1982 }
1983
1984 /* Reply with ProbeResp */
0ec0b7ac 1985 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1986 if (!skb)
1987 return;
1988
1989 resp = (struct ieee80211_mgmt *) skb->data;
1990 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1991#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1992 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
1993 sdata->dev->name, resp->da);
f0706e82 1994#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 1995 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 1996}
1997
f698d856 1998void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 1999 struct ieee80211_rx_status *rx_status)
2000{
f698d856 2001 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2002 struct ieee80211_if_sta *ifsta;
2003 struct ieee80211_mgmt *mgmt;
2004 u16 fc;
2005
2006 if (skb->len < 24)
2007 goto fail;
2008
f0706e82
JB		 2009 ifsta = &sdata->u.sta;
2010
2011 mgmt = (struct ieee80211_mgmt *) skb->data;
2012 fc = le16_to_cpu(mgmt->frame_control);
2013
2014 switch (fc & IEEE80211_FCTL_STYPE) {
2015 case IEEE80211_STYPE_PROBE_REQ:
2016 case IEEE80211_STYPE_PROBE_RESP:
2017 case IEEE80211_STYPE_BEACON:
2018 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2019 case IEEE80211_STYPE_AUTH:
2020 case IEEE80211_STYPE_ASSOC_RESP:
2021 case IEEE80211_STYPE_REASSOC_RESP:
2022 case IEEE80211_STYPE_DEAUTH:
2023 case IEEE80211_STYPE_DISASSOC:
2024 skb_queue_tail(&ifsta->skb_queue, skb);
2025 queue_work(local->hw.workqueue, &ifsta->work);
2026 return;
f0706e82
JB		 2027 }
2028
2029 fail:
2030 kfree_skb(skb);
2031}
2032
f698d856 2033static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2034 struct sk_buff *skb)
2035{
2036 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2037 struct ieee80211_if_sta *ifsta;
2038 struct ieee80211_mgmt *mgmt;
2039 u16 fc;
2040
f0706e82
JB		 2041 ifsta = &sdata->u.sta;
2042
2043 rx_status = (struct ieee80211_rx_status *) skb->cb;
2044 mgmt = (struct ieee80211_mgmt *) skb->data;
2045 fc = le16_to_cpu(mgmt->frame_control);
2046
2047 switch (fc & IEEE80211_FCTL_STYPE) {
2048 case IEEE80211_STYPE_PROBE_REQ:
504a71e4 2049 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2050 break;
2051 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2052 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2053 break;
2054 case IEEE80211_STYPE_BEACON:
f698d856 2055 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2056 break;
2057 case IEEE80211_STYPE_AUTH:
f698d856 2058 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2059 break;
2060 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2061 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2062 break;
2063 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2064 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2065 break;
2066 case IEEE80211_STYPE_DEAUTH:
f698d856 2067 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2068 break;
2069 case IEEE80211_STYPE_DISASSOC:
f698d856 2070 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2071 break;
2072 }
2073
2074 kfree_skb(skb);
2075}
2076
2077
f698d856 2078static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2079{
f698d856 2080 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2081 int active = 0;
2082 struct sta_info *sta;
2083
d0709a65
JB		 2084 rcu_read_lock();
2085
2086 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2087 if (sta->sdata == sdata &&
f0706e82
JB		 2088 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2089 jiffies)) {
2090 active++;
2091 break;
2092 }
2093 }
d0709a65
JB		 2094
2095 rcu_read_unlock();
f0706e82
JB		 2096
2097 return active;
2098}
2099
2100
f698d856 2101static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2102 struct ieee80211_if_sta *ifsta)
2103{
2104 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2105
f698d856
JBG		 2106 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2107 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2108 return;
2109
137f9f46
AF		 2110 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2111 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2112 return;
2113
f0706e82 2114 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 2115 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
c2b13452 2116 ieee80211_request_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 2117}
2118
2119
9c6bd790 2120static void ieee80211_sta_timer(unsigned long data)
f0706e82 2121{
60f8b39c
JB		 2122 struct ieee80211_sub_if_data *sdata =
2123 (struct ieee80211_sub_if_data *) data;
2124 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2125 struct ieee80211_local *local = sdata->local;
f0706e82 2126
60f8b39c
JB		 2127 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2128 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2129}
2130
f698d856 2131static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2132 struct ieee80211_if_sta *ifsta)
2133{
f698d856 2134 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2135
2136 if (local->ops->reset_tsf) {
2137 /* Reset own TSF to allow time synchronization work. */
2138 local->ops->reset_tsf(local_to_hw(local));
2139 }
2140
2141 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2142
2143
2144 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2145 ifsta->auth_alg = WLAN_AUTH_OPEN;
2146 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2147 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2148 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2149 ifsta->auth_alg = WLAN_AUTH_LEAP;
2150 else
2151 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2152 ifsta->auth_transaction = -1;
d6f2da5b 2153 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2154 ifsta->assoc_scan_tries = 0;
9859b81e 2155 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2156 ifsta->auth_tries = 0;
2157 ifsta->assoc_tries = 0;
24e64622 2158 netif_tx_stop_all_queues(sdata->dev);
f698d856 2159 netif_carrier_off(sdata->dev);
f0706e82
JB		 2160}
2161
2162
f0706e82
JB		 2163static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2164 const char *ssid, int ssid_len)
2165{
2166 int tmp, hidden_ssid;
2167
48225709
MW		 2168 if (ssid_len == ifsta->ssid_len &&
2169 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2170 return 1;
2171
d6f2da5b 2172 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2173 return 0;
2174
2175 hidden_ssid = 1;
2176 tmp = ssid_len;
2177 while (tmp--) {
2178 if (ssid[tmp] != '\0') {
2179 hidden_ssid = 0;
2180 break;
2181 }
2182 }
2183
cb3da8cc 2184 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
f0706e82
JB		 2185 return 1;
2186
2187 if (ssid_len == 1 && ssid[0] == ' ')
2188 return 1;
2189
2190 return 0;
2191}
2192
f698d856 2193static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2194 struct ieee80211_if_sta *ifsta)
2195{
f698d856 2196 struct ieee80211_local *local = sdata->local;
c2b13452 2197 struct ieee80211_bss *bss;
8318d78a 2198 struct ieee80211_supported_band *sband;
f0706e82
JB		 2199 u8 bssid[ETH_ALEN], *pos;
2200 int i;
167ad6f7 2201 int ret;
f0706e82 2202
dfe67012
AF		 2203 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2204 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2205 } else {
2206 /* Generate random, not broadcast, locally administered BSSID. Mix in
2207 * own MAC address to make sure that devices that do not have proper
2208 * random number generator get different BSSID. */
2209 get_random_bytes(bssid, ETH_ALEN);
2210 for (i = 0; i < ETH_ALEN; i++)
2211 bssid[i] ^= sdata->dev->dev_addr[i];
2212 bssid[0] &= ~0x01;
2213 bssid[0] |= 0x02;
2214 }
f0706e82 2215
0c68ae26
JB		 2216 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2217 sdata->dev->name, bssid);
f0706e82 2218
98c8fccf 2219 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2220 local->hw.conf.channel->center_freq,
cffdd30d 2221 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2222 if (!bss)
2223 return -ENOMEM;
2224
8318d78a
JB		 2225 bss->band = local->hw.conf.channel->band;
2226 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2227
2228 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2229 local->hw.conf.beacon_int = 100;
f0706e82 2230 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2231 bss->last_update = jiffies;
2232 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2233
2234 if (sdata->default_key)
f0706e82 2235 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2236 else
f0706e82 2237 sdata->drop_unencrypted = 0;
988c0f72 2238
8318d78a 2239 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2240 pos = bss->supp_rates;
8318d78a
JB		 2241 for (i = 0; i < sband->n_bitrates; i++) {
2242 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2243 *pos++ = (u8) (rate / 5);
2244 }
2245
f698d856 2246 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2247 ieee80211_rx_bss_put(local, bss);
167ad6f7 2248 return ret;
f0706e82
JB		 2249}
2250
2251
f698d856 2252static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2253 struct ieee80211_if_sta *ifsta)
2254{
f698d856 2255 struct ieee80211_local *local = sdata->local;
c2b13452 2256 struct ieee80211_bss *bss;
f0706e82
JB		 2257 int found = 0;
2258 u8 bssid[ETH_ALEN];
2259 int active_ibss;
2260
2261 if (ifsta->ssid_len == 0)
2262 return -EINVAL;
2263
f698d856 2264 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2265#ifdef CONFIG_MAC80211_IBSS_DEBUG
2266 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2267 sdata->dev->name, active_ibss);
f0706e82 2268#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2269 spin_lock_bh(&local->bss_lock);
2270 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2271 if (ifsta->ssid_len != bss->ssid_len ||
2272 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2273 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2274 continue;
dfe67012
AF		 2275 if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
2276 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
2277 continue;
f0706e82 2278#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2279 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB		 2280#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2281 memcpy(bssid, bss->bssid, ETH_ALEN);
2282 found = 1;
2283 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2284 break;
2285 }
c2b13452 2286 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2287
2288#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2289 if (found)
0c68ae26
JB		 2290 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2291 "%pM\n", bssid, ifsta->bssid);
f0706e82 2292#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb 2293
dfe67012
AF		 2294 if (found &&
2295 ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2296 memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
167ad6f7 2297 int ret;
80693ceb
DD		 2298 int search_freq;
2299
2300 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2301 search_freq = bss->freq;
2302 else
2303 search_freq = local->hw.conf.channel->center_freq;
2304
f698d856 2305 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2306 ifsta->ssid, ifsta->ssid_len);
2307 if (!bss)
2308 goto dont_join;
2309
0c68ae26 2310 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2311 " based on configured SSID\n",
0c68ae26 2312 sdata->dev->name, bssid);
f698d856 2313 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2314 ieee80211_rx_bss_put(local, bss);
167ad6f7 2315 return ret;
f0706e82 2316 }
80693ceb
DD		 2317
2318dont_join:
f0706e82
JB		 2319#ifdef CONFIG_MAC80211_IBSS_DEBUG
2320 printk(KERN_DEBUG " did not try to join ibss\n");
2321#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2322
2323 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2324 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2325 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2326 mod_timer(&ifsta->timer, jiffies +
2327 IEEE80211_IBSS_MERGE_INTERVAL);
2328 } else if (time_after(jiffies, local->last_scan_completed +
2329 IEEE80211_SCAN_INTERVAL)) {
2330 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2331 "join\n", sdata->dev->name);
c2b13452 2332 return ieee80211_request_scan(sdata, ifsta->ssid,
f0706e82 2333 ifsta->ssid_len);
48c2fc59 2334 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2335 int interval = IEEE80211_SCAN_INTERVAL;
2336
2337 if (time_after(jiffies, ifsta->ibss_join_req +
2338 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2339 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2340 (!(local->oper_channel->flags &
2341 IEEE80211_CHAN_NO_IBSS)))
f698d856 2342 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2343 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2344 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2345 " %d MHz\n", sdata->dev->name,
8318d78a 2346 local->hw.conf.channel->center_freq);
f0706e82
JB		 2347 }
2348
2349 /* No IBSS found - decrease scan interval and continue
2350 * scanning. */
2351 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2352 }
2353
48c2fc59 2354 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2355 mod_timer(&ifsta->timer, jiffies + interval);
2356 return 0;
2357 }
2358
2359 return 0;
2360}
2361
2362
9c6bd790
JB		 2363static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2364 struct ieee80211_if_sta *ifsta)
f0706e82 2365{
9c6bd790 2366 struct ieee80211_local *local = sdata->local;
c2b13452 2367 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2368 int top_rssi = 0, freq;
f0706e82 2369
c2b13452 2370 spin_lock_bh(&local->bss_lock);
9c6bd790 2371 freq = local->oper_channel->center_freq;
c2b13452 2372 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2373 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2374 continue;
f0706e82 2375
9c6bd790
JB		 2376 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2377 IEEE80211_STA_AUTO_BSSID_SEL |
2378 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2379 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2380 !!sdata->default_key))
2381 continue;
f0706e82 2382
9c6bd790
JB		 2383 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2384 bss->freq != freq)
2385 continue;
9d139c81 2386
9c6bd790
JB		 2387 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2388 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2389 continue;
f0706e82 2390
9c6bd790
JB		 2391 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2392 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2393 continue;
9d139c81 2394
9c6bd790
JB		 2395 if (!selected || top_rssi < bss->signal) {
2396 selected = bss;
2397 top_rssi = bss->signal;
2398 }
f0706e82 2399 }
9c6bd790
JB		 2400 if (selected)
2401 atomic_inc(&selected->users);
c2b13452 2402 spin_unlock_bh(&local->bss_lock);
9d139c81 2403
9c6bd790
JB		 2404 if (selected) {
2405 ieee80211_set_freq(sdata, selected->freq);
2406 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2407 ieee80211_sta_set_ssid(sdata, selected->ssid,
2408 selected->ssid_len);
2409 ieee80211_sta_set_bssid(sdata, selected->bssid);
2410 ieee80211_sta_def_wmm_params(sdata, selected);
fdfacf0a
JM		 2411 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2412 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2413 else
2414 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2415
9c6bd790
JB		 2416 /* Send out direct probe if no probe resp was received or
2417 * the one we have is outdated
2418 */
2419 if (!selected->last_probe_resp ||
2420 time_after(jiffies, selected->last_probe_resp
2421 + IEEE80211_SCAN_RESULT_EXPIRE))
2422 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2423 else
2424 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2425
9c6bd790
JB		 2426 ieee80211_rx_bss_put(local, selected);
2427 ieee80211_sta_reset_auth(sdata, ifsta);
2428 return 0;
2429 } else {
2430 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2431 ifsta->assoc_scan_tries++;
2432 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
c2b13452 2433 ieee80211_start_scan(sdata, NULL, 0);
9c6bd790 2434 else
c2b13452 2435 ieee80211_start_scan(sdata, ifsta->ssid,
9c6bd790
JB		 2436 ifsta->ssid_len);
2437 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2438 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
e374055a
S		 2439 } else {
2440 ifsta->assoc_scan_tries = 0;
9c6bd790 2441 ifsta->state = IEEE80211_STA_MLME_DISABLED;
e374055a 2442 }
9c6bd790
JB		 2443 }
2444 return -1;
2445}
2446
2447
2448static void ieee80211_sta_work(struct work_struct *work)
2449{
2450 struct ieee80211_sub_if_data *sdata =
2451 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2452 struct ieee80211_local *local = sdata->local;
2453 struct ieee80211_if_sta *ifsta;
2454 struct sk_buff *skb;
2455
2456 if (!netif_running(sdata->dev))
2457 return;
2458
c2b13452 2459 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2460 return;
2461
05c914fe
JB		 2462 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2463 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2464 return;
f0706e82
JB		 2465 ifsta = &sdata->u.sta;
2466
9c6bd790
JB		 2467 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2468 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2469
2470 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2471 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2472 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2473 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
c2b13452
JB		 2474 ieee80211_start_scan(sdata, ifsta->scan_ssid,
2475 ifsta->scan_ssid_len);
9c6bd790 2476 return;
f0706e82
JB		 2477 }
2478
9c6bd790
JB		 2479 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2480 if (ieee80211_sta_config_auth(sdata, ifsta))
2481 return;
2482 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2483 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2484 return;
d6f2da5b 2485
9c6bd790
JB		 2486 switch (ifsta->state) {
2487 case IEEE80211_STA_MLME_DISABLED:
2488 break;
2489 case IEEE80211_STA_MLME_DIRECT_PROBE:
2490 ieee80211_direct_probe(sdata, ifsta);
2491 break;
2492 case IEEE80211_STA_MLME_AUTHENTICATE:
2493 ieee80211_authenticate(sdata, ifsta);
2494 break;
2495 case IEEE80211_STA_MLME_ASSOCIATE:
2496 ieee80211_associate(sdata, ifsta);
2497 break;
2498 case IEEE80211_STA_MLME_ASSOCIATED:
2499 ieee80211_associated(sdata, ifsta);
2500 break;
2501 case IEEE80211_STA_MLME_IBSS_SEARCH:
2502 ieee80211_sta_find_ibss(sdata, ifsta);
2503 break;
2504 case IEEE80211_STA_MLME_IBSS_JOINED:
2505 ieee80211_sta_merge_ibss(sdata, ifsta);
2506 break;
2507 default:
2508 WARN_ON(1);
2509 break;
2510 }
2511
2512 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2513 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2514 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2515
2516 ieee80211_set_disassoc(sdata, ifsta, false, true,
2517 WLAN_REASON_UNSPECIFIED);
2518 }
f0706e82
JB		 2519}
2520
9c6bd790
JB		 2521static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2522{
05c914fe 2523 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2524 queue_work(sdata->local->hw.workqueue,
2525 &sdata->u.sta.work);
2526}
f0706e82 2527
9c6bd790
JB		 2528/* interface setup */
2529void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2530{
9c6bd790 2531 struct ieee80211_if_sta *ifsta;
988c0f72 2532
9c6bd790
JB		 2533 ifsta = &sdata->u.sta;
2534 INIT_WORK(&ifsta->work, ieee80211_sta_work);
c481ec97 2535 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
9c6bd790 2536 setup_timer(&ifsta->timer, ieee80211_sta_timer,
c481ec97
S		 2537 (unsigned long) sdata);
2538 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790
JB		 2539 (unsigned long) sdata);
2540 skb_queue_head_init(&ifsta->skb_queue);
2541
2542 ifsta->capab = WLAN_CAPABILITY_ESS;
2543 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2544 IEEE80211_AUTH_ALG_SHARED_KEY;
2545 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2546 IEEE80211_STA_AUTO_BSSID_SEL |
2547 IEEE80211_STA_AUTO_CHANNEL_SEL;
2548 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2549 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2550}
2551
9c6bd790
JB		 2552/*
2553 * Add a new IBSS station, will also be called by the RX code when,
2554 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2555 * must be callable in atomic context.
2556 */
f698d856 2557struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
881d948c 2558 u8 *bssid,u8 *addr, u32 supp_rates)
f0706e82 2559{
f698d856 2560 struct ieee80211_local *local = sdata->local;
f0706e82 2561 struct sta_info *sta;
87291c02 2562 int band = local->hw.conf.channel->band;
f0706e82
JB		 2563
2564 /* TODO: Could consider removing the least recently used entry and
2565 * allow new one to be added. */
2566 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2567 if (net_ratelimit()) {
2568 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2569 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2570 }
2571 return NULL;
2572 }
2573
1e188637 2574 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2575 return NULL;
2576
f4ea83dd 2577#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2578 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2579 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2580#endif
f0706e82 2581
73651ee6
JB		 2582 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2583 if (!sta)
f0706e82
JB		 2584 return NULL;
2585
07346f81 2586 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2587
8e1535d5 2588 /* make sure mandatory rates are always added */
323ce79a 2589 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2590 ieee80211_mandatory_rates(local, band);
f0706e82 2591
4b7679a5 2592 rate_control_rate_init(sta);
f0706e82 2593
93e5deb1 2594 if (sta_info_insert(sta))
73651ee6 2595 return NULL;
73651ee6 2596
d0709a65 2597 return sta;
f0706e82
JB		 2598}
2599
9c6bd790
JB		 2600/* configuration hooks */
2601void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2602 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2603{
2604 struct ieee80211_local *local = sdata->local;
60f8b39c 2605
05c914fe 2606 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2607 return;
60f8b39c 2608
9c6bd790
JB		 2609 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2610 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2611 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2612 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2613
9c6bd790
JB		 2614 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2615 ieee80211_set_disassoc(sdata, ifsta, true, true,
2616 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2617
9c6bd790
JB		 2618 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2619 queue_work(local->hw.workqueue, &ifsta->work);
2620 }
2621}
60f8b39c 2622
9c6bd790
JB		 2623int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2624{
2625 struct ieee80211_if_sta *ifsta;
60f8b39c 2626
9c6bd790
JB		 2627 if (len > IEEE80211_MAX_SSID_LEN)
2628 return -EINVAL;
2629
2630 ifsta = &sdata->u.sta;
2631
2632 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2633 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2634 memcpy(ifsta->ssid, ssid, len);
2635 ifsta->ssid_len = len;
60f8b39c 2636 }
60f8b39c 2637
dfe67012
AF		 2638 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2639
9c6bd790
JB		 2640 if (len)
2641 ifsta->flags |= IEEE80211_STA_SSID_SET;
2642 else
2643 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2644
dfe67012 2645 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2646 ifsta->ibss_join_req = jiffies;
2647 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2648 return ieee80211_sta_find_ibss(sdata, ifsta);
2649 }
2650
2651 return 0;
2652}
2653
2654int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2655{
2656 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2657 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2658 *len = ifsta->ssid_len;
2659 return 0;
2660}
2661
2662int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2663{
2664 struct ieee80211_if_sta *ifsta;
9c6bd790
JB		 2665
2666 ifsta = &sdata->u.sta;
2667
dfe67012
AF		 2668 if (is_valid_ether_addr(bssid)) {
2669 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2670 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2671 } else {
2672 memset(ifsta->bssid, 0, ETH_ALEN);
2673 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2674 }
2675
2676 if (netif_running(sdata->dev)) {
2677 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 2678 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2679 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 2680 }
2681 }
60f8b39c 2682
dfe67012 2683 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
9c6bd790
JB		 2684}
2685
2686int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2687{
2688 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2689
2690 kfree(ifsta->extra_ie);
2691 if (len == 0) {
2692 ifsta->extra_ie = NULL;
2693 ifsta->extra_ie_len = 0;
60f8b39c 2694 return 0;
60f8b39c 2695 }
9c6bd790
JB		 2696 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2697 if (!ifsta->extra_ie) {
2698 ifsta->extra_ie_len = 0;
2699 return -ENOMEM;
2700 }
2701 memcpy(ifsta->extra_ie, ie, len);
2702 ifsta->extra_ie_len = len;
2703 return 0;
60f8b39c
JB		 2704}
2705
f698d856 2706int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2707{
f0706e82
JB		 2708 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2709
f4ea83dd 2710 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2711 sdata->dev->name, reason);
f0706e82 2712
05c914fe
JB		 2713 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2714 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2715 return -EINVAL;
2716
aa458d17 2717 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2718 return 0;
2719}
2720
f698d856 2721int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2722{
f0706e82
JB		 2723 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2724
f4ea83dd 2725 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2726 sdata->dev->name, reason);
f0706e82 2727
05c914fe 2728 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2729 return -EINVAL;
2730
d6f2da5b 2731 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2732 return -1;
2733
aa458d17 2734 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2735 return 0;
2736}
84363e6e 2737
9c6bd790
JB		 2738/* scan finished notification */
2739void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2740{
2741 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2742 struct ieee80211_if_sta *ifsta;
2743
05c914fe 2744 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790 2745 ifsta = &sdata->u.sta;
c0415b54
AF		 2746 if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2747 !ieee80211_sta_active_ibss(sdata))
9c6bd790
JB		 2748 ieee80211_sta_find_ibss(sdata, ifsta);
2749 }
2750
2751 /* Restart STA timers */
2752 rcu_read_lock();
2753 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2754 ieee80211_restart_sta_timer(sdata);
2755 rcu_read_unlock();
2756}
520eb820
KV		 2757
2758void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2759{
2760 struct ieee80211_local *local =
2761 container_of(work, struct ieee80211_local,
2762 dynamic_ps_disable_work);
2763
2764 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2765 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2766 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2767 }
2768
2769 ieee80211_wake_queues_by_reason(&local->hw,
2770 IEEE80211_QUEUE_STOP_REASON_PS);
2771}
2772
2773void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2774{
2775 struct ieee80211_local *local =
2776 container_of(work, struct ieee80211_local,
2777 dynamic_ps_enable_work);
a97b77b9 2778 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 2779
2780 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2781 return;
2782
4be8c387
JB		 2783 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2784 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2785
4be8c387 2786 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2787 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2788}
2789
2790void ieee80211_dynamic_ps_timer(unsigned long data)
2791{
2792 struct ieee80211_local *local = (void *) data;
2793
2794 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2795}
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