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libertas: fix power save issue in libertas_sdio module
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82
JB		 17#include <linux/if_arp.h>
18#include <linux/wireless.h>
19#include <linux/random.h>
20#include <linux/etherdevice.h>
d0709a65 21#include <linux/rtnetlink.h>
f0706e82 22#include <net/iw_handler.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82 29
6042a3e3 30#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 31#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32#define IEEE80211_AUTH_MAX_TRIES 3
33#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34#define IEEE80211_ASSOC_MAX_TRIES 3
35#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36#define IEEE80211_PROBE_INTERVAL (60 * HZ)
37#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38#define IEEE80211_SCAN_INTERVAL (2 * HZ)
39#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 40#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 41
f0706e82
JB		 42#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
44
45#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
46
47
5484e237
JB		 48/* utils */
49static int ecw2cw(int ecw)
60f8b39c 50{
5484e237 51 return (1 << ecw) - 1;
60f8b39c
JB		 52}
53
c2b13452 54static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 55{
56 u8 *end, *pos;
57
00d3f14c 58 pos = bss->cbss.information_elements;
43ac2ca3
JM		 59 if (pos == NULL)
60 return NULL;
00d3f14c 61 end = pos + bss->cbss.len_information_elements;
43ac2ca3
JM		 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) {
00d3f14c 292 if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
9ac19a90
JB		 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
00d3f14c 303 if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
9ac19a90
JB		 304 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
305 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
306
307 ieee80211_rx_bss_put(local, bss);
308 } else {
309 rates = ~0;
310 rates_len = sband->n_bitrates;
311 }
312
313 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
314 memset(mgmt, 0, 24);
315 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
316 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
317 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
318
319 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
320 skb_put(skb, 10);
321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_REASSOC_REQ);
323 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
324 mgmt->u.reassoc_req.listen_interval =
325 cpu_to_le16(local->hw.conf.listen_interval);
326 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
327 ETH_ALEN);
328 } else {
329 skb_put(skb, 4);
330 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
331 IEEE80211_STYPE_ASSOC_REQ);
332 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 333 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 334 cpu_to_le16(local->hw.conf.listen_interval);
335 }
336
337 /* SSID */
338 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
339 *pos++ = WLAN_EID_SSID;
340 *pos++ = ifsta->ssid_len;
341 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
342
343 /* add all rates which were marked to be used above */
344 supp_rates_len = rates_len;
345 if (supp_rates_len > 8)
346 supp_rates_len = 8;
347
348 len = sband->n_bitrates;
349 pos = skb_put(skb, supp_rates_len + 2);
350 *pos++ = WLAN_EID_SUPP_RATES;
351 *pos++ = supp_rates_len;
352
353 count = 0;
354 for (i = 0; i < sband->n_bitrates; i++) {
355 if (BIT(i) & rates) {
356 int rate = sband->bitrates[i].bitrate;
357 *pos++ = (u8) (rate / 5);
358 if (++count == 8)
359 break;
360 }
361 }
362
363 if (rates_len > count) {
364 pos = skb_put(skb, rates_len - count + 2);
365 *pos++ = WLAN_EID_EXT_SUPP_RATES;
366 *pos++ = rates_len - count;
367
368 for (i++; i < sband->n_bitrates; i++) {
369 if (BIT(i) & rates) {
370 int rate = sband->bitrates[i].bitrate;
371 *pos++ = (u8) (rate / 5);
372 }
373 }
374 }
375
376 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
377 /* 1. power capabilities */
378 pos = skb_put(skb, 4);
379 *pos++ = WLAN_EID_PWR_CAPABILITY;
380 *pos++ = 2;
381 *pos++ = 0; /* min tx power */
382 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
383
384 /* 2. supported channels */
385 /* TODO: get this in reg domain format */
386 pos = skb_put(skb, 2 * sband->n_channels + 2);
387 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
388 *pos++ = 2 * sband->n_channels;
389 for (i = 0; i < sband->n_channels; i++) {
390 *pos++ = ieee80211_frequency_to_channel(
391 sband->channels[i].center_freq);
392 *pos++ = 1; /* one channel in the subband*/
393 }
394 }
395
396 if (ifsta->extra_ie) {
397 pos = skb_put(skb, ifsta->extra_ie_len);
398 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
399 }
400
401 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
402 pos = skb_put(skb, 9);
403 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
404 *pos++ = 7; /* len */
405 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
406 *pos++ = 0x50;
407 *pos++ = 0xf2;
408 *pos++ = 2; /* WME */
409 *pos++ = 0; /* WME info */
410 *pos++ = 1; /* WME ver */
411 *pos++ = 0;
412 }
413
414 /* wmm support is a must to HT */
eb46936b
VT		 415 /*
416 * IEEE802.11n does not allow TKIP/WEP as pairwise
417 * ciphers in HT mode. We still associate in non-ht
418 * mode (11a/b/g) if any one of these ciphers is
419 * configured as pairwise.
420 */
9ac19a90 421 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB		 422 sband->ht_cap.ht_supported &&
423 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
eb46936b
VT		 424 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
425 (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
d9fe60de
JB		 426 struct ieee80211_ht_info *ht_info =
427 (struct ieee80211_ht_info *)(ht_ie + 2);
428 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 429 __le16 tmp;
430 u32 flags = local->hw.conf.channel->flags;
431
d9fe60de
JB		 432 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
433 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
9ac19a90 434 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
d9fe60de 435 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 436 cap &= ~IEEE80211_HT_CAP_SGI_40;
437 }
438 break;
d9fe60de 439 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
9ac19a90 440 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
d9fe60de 441 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 442 cap &= ~IEEE80211_HT_CAP_SGI_40;
443 }
444 break;
445 }
446
447 tmp = cpu_to_le16(cap);
448 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
449 *pos++ = WLAN_EID_HT_CAPABILITY;
450 *pos++ = sizeof(struct ieee80211_ht_cap);
451 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
452 memcpy(pos, &tmp, sizeof(u16));
453 pos += sizeof(u16);
454 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 455 *pos++ = sband->ht_cap.ampdu_factor |
456 (sband->ht_cap.ampdu_density << 2);
457 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 458 }
459
9aed3cc1
JM		 460 add_extra_ies(skb, e_ies, e_ies_len);
461
9ac19a90
JB		 462 kfree(ifsta->assocreq_ies);
463 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
464 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
465 if (ifsta->assocreq_ies)
466 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
467
e50db65c 468 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 469}
470
471
ef422bc0
JB		 472static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
473 u16 stype, u16 reason)
9ac19a90
JB		 474{
475 struct ieee80211_local *local = sdata->local;
ef422bc0 476 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
9ac19a90
JB		 477 struct sk_buff *skb;
478 struct ieee80211_mgmt *mgmt;
9aed3cc1
JM		 479 u8 *ies;
480 size_t ies_len;
9ac19a90 481
9aed3cc1
JM		 482 if (stype == IEEE80211_STYPE_DEAUTH) {
483 ies = sdata->u.sta.ie_deauth;
484 ies_len = sdata->u.sta.ie_deauth_len;
485 } else {
486 ies = sdata->u.sta.ie_disassoc;
487 ies_len = sdata->u.sta.ie_disassoc_len;
488 }
489
490 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
491 ies_len);
9ac19a90 492 if (!skb) {
ef422bc0
JB		 493 printk(KERN_DEBUG "%s: failed to allocate buffer for "
494 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 495 return;
496 }
497 skb_reserve(skb, local->hw.extra_tx_headroom);
498
499 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
500 memset(mgmt, 0, 24);
501 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
502 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
503 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
ef422bc0 504 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 505 skb_put(skb, 2);
ef422bc0 506 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 507 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
508
9aed3cc1
JM		 509 add_extra_ies(skb, ies, ies_len);
510
5394af4d 511 ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 512}
513
572e0012
KV		 514void ieee80211_send_pspoll(struct ieee80211_local *local,
515 struct ieee80211_sub_if_data *sdata)
516{
517 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
518 struct ieee80211_pspoll *pspoll;
519 struct sk_buff *skb;
520 u16 fc;
521
522 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
523 if (!skb) {
524 printk(KERN_DEBUG "%s: failed to allocate buffer for "
525 "pspoll frame\n", sdata->dev->name);
526 return;
527 }
528 skb_reserve(skb, local->hw.extra_tx_headroom);
529
530 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
531 memset(pspoll, 0, sizeof(*pspoll));
532 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
533 pspoll->frame_control = cpu_to_le16(fc);
534 pspoll->aid = cpu_to_le16(ifsta->aid);
535
536 /* aid in PS-Poll has its two MSBs each set to 1 */
537 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
538
539 memcpy(pspoll->bssid, ifsta->bssid, ETH_ALEN);
540 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
541
542 ieee80211_tx_skb(sdata, skb, 0);
543
544 return;
545}
546
60f8b39c 547/* MLME */
f698d856 548static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
99cf5f5f
JB		 549 const size_t supp_rates_len,
550 const u8 *supp_rates)
e2839d8f 551{
e2839d8f
VK		 552 struct ieee80211_local *local = sdata->local;
553 int i, have_higher_than_11mbit = 0;
554
e2839d8f 555 /* cf. IEEE 802.11 9.2.12 */
99cf5f5f
JB		 556 for (i = 0; i < supp_rates_len; i++)
557 if ((supp_rates[i] & 0x7f) * 5 > 110)
e2839d8f
VK		 558 have_higher_than_11mbit = 1;
559
560 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
561 have_higher_than_11mbit)
562 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
563 else
564 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
565
3d35f7c6 566 ieee80211_set_wmm_default(sdata);
e2839d8f
VK		 567}
568
f698d856 569static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 570 struct ieee80211_if_sta *ifsta,
571 u8 *wmm_param, size_t wmm_param_len)
572{
f0706e82
JB		 573 struct ieee80211_tx_queue_params params;
574 size_t left;
575 int count;
576 u8 *pos;
577
3434fbd3
JB		 578 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
579 return;
580
581 if (!wmm_param)
582 return;
583
f0706e82
JB		 584 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
585 return;
586 count = wmm_param[6] & 0x0f;
587 if (count == ifsta->wmm_last_param_set)
588 return;
589 ifsta->wmm_last_param_set = count;
590
591 pos = wmm_param + 8;
592 left = wmm_param_len - 8;
593
594 memset(&params, 0, sizeof(params));
595
596 if (!local->ops->conf_tx)
597 return;
598
599 local->wmm_acm = 0;
600 for (; left >= 4; left -= 4, pos += 4) {
601 int aci = (pos[0] >> 5) & 0x03;
602 int acm = (pos[0] >> 4) & 0x01;
603 int queue;
604
605 switch (aci) {
606 case 1:
e100bb64 607 queue = 3;
988c0f72 608 if (acm)
f0706e82 609 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 610 break;
611 case 2:
e100bb64 612 queue = 1;
988c0f72 613 if (acm)
f0706e82 614 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 615 break;
616 case 3:
e100bb64 617 queue = 0;
988c0f72 618 if (acm)
f0706e82 619 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 620 break;
621 case 0:
622 default:
e100bb64 623 queue = 2;
988c0f72 624 if (acm)
f0706e82 625 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 626 break;
627 }
628
629 params.aifs = pos[0] & 0x0f;
630 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
631 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 632 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 633#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 634 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 635 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 636 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 637 params.cw_max, params.txop);
638#endif
f0706e82
JB		 639 /* TODO: handle ACM (block TX, fallback to next lowest allowed
640 * AC for now) */
641 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
642 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 643 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 644 }
645 }
646}
647
1fb3606b 648static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
a97b77b9
VN		 649{
650 u8 mask;
651 u8 index, indexn1, indexn2;
652 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
653
654 aid &= 0x3fff;
655 index = aid / 8;
656 mask = 1 << (aid & 7);
657
a97b77b9
VN		 658 indexn1 = tim->bitmap_ctrl & 0xfe;
659 indexn2 = elems->tim_len + indexn1 - 4;
660
661 if (index < indexn1 || index > indexn2)
662 return false;
663
664 index -= indexn1;
665
666 return !!(tim->virtual_map[index] & mask);
667}
668
7a5158ef
JB		 669static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
670 u16 capab, bool erp_valid, u8 erp)
5628221c 671{
bda3933a 672 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 673#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 674 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ebd74487 675#endif
471b3efd 676 u32 changed = 0;
7a5158ef
JB		 677 bool use_protection;
678 bool use_short_preamble;
679 bool use_short_slot;
680
681 if (erp_valid) {
682 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
683 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
684 } else {
685 use_protection = false;
686 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
687 }
688
689 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 690
471b3efd 691 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 692#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 693 if (net_ratelimit()) {
0c68ae26 694 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 695 sdata->dev->name,
5628221c 696 use_protection ? "enabled" : "disabled",
0c68ae26 697 ifsta->bssid);
5628221c 698 }
f4ea83dd 699#endif
471b3efd
JB		 700 bss_conf->use_cts_prot = use_protection;
701 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 702 }
7e9ed188 703
d43c7b37 704 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 705#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 706 if (net_ratelimit()) {
707 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 708 " (BSSID=%pM)\n",
471b3efd 709 sdata->dev->name,
d43c7b37 710 use_short_preamble ? "short" : "long",
0c68ae26 711 ifsta->bssid);
7e9ed188 712 }
f4ea83dd 713#endif
d43c7b37 714 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 715 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 716 }
d9430a32 717
7a5158ef
JB		 718 if (use_short_slot != bss_conf->use_short_slot) {
719#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
720 if (net_ratelimit()) {
391429c1
CL		 721 printk(KERN_DEBUG "%s: switched to %s slot time"
722 " (BSSID=%pM)\n",
7a5158ef
JB		 723 sdata->dev->name,
724 use_short_slot ? "short" : "long",
725 ifsta->bssid);
726 }
727#endif
728 bss_conf->use_short_slot = use_short_slot;
729 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 730 }
731
732 return changed;
733}
734
f5e5bf25
TW		 735static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
736 struct ieee80211_if_sta *ifsta)
737{
738 union iwreq_data wrqu;
739 memset(&wrqu, 0, sizeof(wrqu));
740 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
741 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
742 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
743 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
744}
745
f698d856 746static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 747 struct ieee80211_if_sta *ifsta)
748{
74af0250
LT		 749 char *buf;
750 size_t len;
751 int i;
f0706e82
JB		 752 union iwreq_data wrqu;
753
74af0250
LT		 754 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
755 return;
756
757 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
758 ifsta->assocresp_ies_len), GFP_KERNEL);
759 if (!buf)
760 return;
761
762 len = sprintf(buf, "ASSOCINFO(");
f0706e82 763 if (ifsta->assocreq_ies) {
74af0250
LT		 764 len += sprintf(buf + len, "ReqIEs=");
765 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
766 len += sprintf(buf + len, "%02x",
767 ifsta->assocreq_ies[i]);
768 }
f0706e82 769 }
087d833e 770 if (ifsta->assocresp_ies) {
74af0250
LT		 771 if (ifsta->assocreq_ies)
772 len += sprintf(buf + len, " ");
773 len += sprintf(buf + len, "RespIEs=");
774 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
775 len += sprintf(buf + len, "%02x",
776 ifsta->assocresp_ies[i]);
777 }
f0706e82 778 }
74af0250
LT		 779 len += sprintf(buf + len, ")");
780
781 if (len > IW_CUSTOM_MAX) {
782 len = sprintf(buf, "ASSOCRESPIE=");
783 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
784 len += sprintf(buf + len, "%02x",
785 ifsta->assocresp_ies[i]);
786 }
787 }
788
ad788b5e
JL		 789 if (len <= IW_CUSTOM_MAX) {
790 memset(&wrqu, 0, sizeof(wrqu));
791 wrqu.data.length = len;
792 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
793 }
74af0250
LT		 794
795 kfree(buf);
f0706e82
JB		 796}
797
798
f698d856 799static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026
JB		 800 struct ieee80211_if_sta *ifsta,
801 u32 bss_info_changed)
f0706e82 802{
471b3efd 803 struct ieee80211_local *local = sdata->local;
38668c05 804 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 805
c2b13452 806 struct ieee80211_bss *bss;
d6f2da5b 807
ae5eb026 808 bss_info_changed |= BSS_CHANGED_ASSOC;
f5e5bf25 809 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 810
f5e5bf25
TW		 811 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
812 conf->channel->center_freq,
813 ifsta->ssid, ifsta->ssid_len);
814 if (bss) {
815 /* set timing information */
00d3f14c
JB		 816 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
817 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
bda3933a 818 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 819
ae5eb026 820 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
00d3f14c 821 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 822
823 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 824 }
825
9ac19a90
JB		 826 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
827 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
828 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 829
9ac19a90
JB		 830 ifsta->last_probe = jiffies;
831 ieee80211_led_assoc(local, 1);
9306102e 832
bda3933a 833 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 834 /*
835 * For now just always ask the driver to update the basic rateset
836 * when we have associated, we aren't checking whether it actually
837 * changed or not.
838 */
ae5eb026
JB		 839 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
840 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 841
4be8c387
JB		 842 if (local->powersave) {
843 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
844 local->hw.conf.dynamic_ps_timeout > 0) {
520eb820 845 mod_timer(&local->dynamic_ps_timer, jiffies +
46f2c4bd
JB		 846 msecs_to_jiffies(
847 local->hw.conf.dynamic_ps_timeout));
4be8c387
JB		 848 } else {
849 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
850 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 851 conf->flags |= IEEE80211_CONF_PS;
4be8c387 852 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
520eb820 853 }
e0cb686f
KV		 854 }
855
9ac19a90
JB		 856 netif_tx_start_all_queues(sdata->dev);
857 netif_carrier_on(sdata->dev);
f0706e82 858
9ac19a90 859 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 860}
861
9ac19a90
JB		 862static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
863 struct ieee80211_if_sta *ifsta)
f0706e82 864{
9ac19a90
JB		 865 ifsta->direct_probe_tries++;
866 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB		 867 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
868 sdata->dev->name, ifsta->bssid);
9ac19a90 869 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 870 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 871
872 /*
873 * Most likely AP is not in the range so remove the
874 * bss information associated to the AP
875 */
876 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
877 sdata->local->hw.conf.channel->center_freq,
878 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 879 return;
880 }
f0706e82 881
0c68ae26
JB		 882 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
883 sdata->dev->name, ifsta->bssid,
9ac19a90 884 ifsta->direct_probe_tries);
f0706e82 885
9ac19a90 886 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 887
9ac19a90
JB		 888 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
889
890 /* Direct probe is sent to broadcast address as some APs
891 * will not answer to direct packet in unassociated state.
892 */
893 ieee80211_send_probe_req(sdata, NULL,
894 ifsta->ssid, ifsta->ssid_len);
895
896 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 897}
f0706e82 898
9ac19a90
JB		 899
900static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
901 struct ieee80211_if_sta *ifsta)
f0706e82 902{
9ac19a90
JB		 903 ifsta->auth_tries++;
904 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 905 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 906 " timed out\n",
0c68ae26 907 sdata->dev->name, ifsta->bssid);
9ac19a90 908 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 909 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 910 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
911 sdata->local->hw.conf.channel->center_freq,
912 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 913 return;
914 }
f0706e82 915
9ac19a90 916 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB		 917 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
918 sdata->dev->name, ifsta->bssid);
f0706e82 919
9ac19a90
JB		 920 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
921
922 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 923}
924
5925d976
VN		 925/*
926 * The disassoc 'reason' argument can be either our own reason
927 * if self disconnected or a reason code from the AP.
928 */
aa458d17
TW		 929static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
930 struct ieee80211_if_sta *ifsta, bool deauth,
931 bool self_disconnected, u16 reason)
932{
933 struct ieee80211_local *local = sdata->local;
934 struct sta_info *sta;
e0cb686f 935 u32 changed = 0, config_changed = 0;
aa458d17
TW		 936
937 rcu_read_lock();
938
939 sta = sta_info_get(local, ifsta->bssid);
940 if (!sta) {
941 rcu_read_unlock();
942 return;
943 }
944
945 if (deauth) {
946 ifsta->direct_probe_tries = 0;
947 ifsta->auth_tries = 0;
948 }
949 ifsta->assoc_scan_tries = 0;
950 ifsta->assoc_tries = 0;
951
24e64622 952 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 953 netif_carrier_off(sdata->dev);
954
2dace10e 955 ieee80211_sta_tear_down_BA_sessions(sta);
aa458d17
TW		 956
957 if (self_disconnected) {
958 if (deauth)
ef422bc0
JB		 959 ieee80211_send_deauth_disassoc(sdata,
960 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 961 else
ef422bc0
JB		 962 ieee80211_send_deauth_disassoc(sdata,
963 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 964 }
965
f5e5bf25
TW		 966 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
967 changed |= ieee80211_reset_erp_info(sdata);
968
f5e5bf25 969 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 970 changed |= BSS_CHANGED_ASSOC;
971 sdata->vif.bss_conf.assoc = false;
f5e5bf25
TW		 972
973 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17 974
7a947080 975 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
aa458d17 976 ifsta->state = IEEE80211_STA_MLME_DISABLED;
7a947080
VT		 977 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
978 sdata->local->hw.conf.channel->center_freq,
979 ifsta->ssid, ifsta->ssid_len);
980 }
aa458d17 981
aa458d17
TW		 982 rcu_read_unlock();
983
4797938c 984 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 985 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 986
a8302de9
VT		 987 local->power_constr_level = 0;
988
520eb820
KV		 989 del_timer_sync(&local->dynamic_ps_timer);
990 cancel_work_sync(&local->dynamic_ps_enable_work);
991
e0cb686f
KV		 992 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
993 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
994 config_changed |= IEEE80211_CONF_CHANGE_PS;
995 }
ae5eb026 996
e0cb686f 997 ieee80211_hw_config(local, config_changed);
ae5eb026 998 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 999
1000 rcu_read_lock();
1001
1002 sta = sta_info_get(local, ifsta->bssid);
1003 if (!sta) {
1004 rcu_read_unlock();
1005 return;
1006 }
1007
1008 sta_info_unlink(&sta);
1009
1010 rcu_read_unlock();
1011
1012 sta_info_destroy(sta);
aa458d17 1013}
f0706e82 1014
9ac19a90
JB		 1015static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1016{
1017 if (!sdata || !sdata->default_key ||
1018 sdata->default_key->conf.alg != ALG_WEP)
1019 return 0;
1020 return 1;
1021}
1022
f698d856 1023static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1024 struct ieee80211_if_sta *ifsta)
1025{
f698d856 1026 struct ieee80211_local *local = sdata->local;
c2b13452 1027 struct ieee80211_bss *bss;
5b98b1f7
JB		 1028 int bss_privacy;
1029 int wep_privacy;
1030 int privacy_invoked;
f0706e82 1031
5b98b1f7 1032 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 1033 return 0;
1034
f698d856 1035 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 1036 local->hw.conf.channel->center_freq,
cffdd30d 1037 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1038 if (!bss)
1039 return 0;
1040
00d3f14c 1041 bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1042 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1043 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1044
3e122be0 1045 ieee80211_rx_bss_put(local, bss);
f0706e82 1046
5b98b1f7
JB		 1047 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1048 return 0;
1049
1050 return 1;
f0706e82
JB		 1051}
1052
f698d856 1053static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1054 struct ieee80211_if_sta *ifsta)
1055{
1056 ifsta->assoc_tries++;
1057 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1058 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1059 " timed out\n",
0c68ae26 1060 sdata->dev->name, ifsta->bssid);
48c2fc59 1061 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 1062 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 1063 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
1064 sdata->local->hw.conf.channel->center_freq,
1065 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1066 return;
1067 }
1068
48c2fc59 1069 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB		 1070 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1071 sdata->dev->name, ifsta->bssid);
f698d856 1072 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1073 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1074 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1075 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1076 return;
1077 }
1078
f698d856 1079 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1080
1081 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1082}
1083
1084
f698d856 1085static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1086 struct ieee80211_if_sta *ifsta)
1087{
f698d856 1088 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1089 struct sta_info *sta;
1090 int disassoc;
1091
1092 /* TODO: start monitoring current AP signal quality and number of
1093 * missed beacons. Scan other channels every now and then and search
1094 * for better APs. */
1095 /* TODO: remove expired BSSes */
1096
48c2fc59 1097 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1098
d0709a65
JB		 1099 rcu_read_lock();
1100
f0706e82
JB		 1101 sta = sta_info_get(local, ifsta->bssid);
1102 if (!sta) {
0c68ae26
JB		 1103 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1104 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 1105 disassoc = 1;
1106 } else {
1107 disassoc = 0;
1108 if (time_after(jiffies,
1109 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1110 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1111 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 1112 "current AP %pM - assume out of "
f0706e82 1113 "range\n",
0c68ae26 1114 sdata->dev->name, ifsta->bssid);
f0706e82 1115 disassoc = 1;
d6f2da5b 1116 } else
f698d856 1117 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 1118 ifsta->ssid,
1119 ifsta->ssid_len);
d6f2da5b 1120 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1121 } else {
d6f2da5b 1122 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1123 if (time_after(jiffies, ifsta->last_probe +
1124 IEEE80211_PROBE_INTERVAL)) {
1125 ifsta->last_probe = jiffies;
f698d856 1126 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1127 ifsta->ssid,
1128 ifsta->ssid_len);
1129 }
1130 }
f0706e82 1131 }
d0709a65
JB		 1132
1133 rcu_read_unlock();
1134
7a947080 1135 if (disassoc)
60f8b39c
JB		 1136 ieee80211_set_disassoc(sdata, ifsta, true, true,
1137 WLAN_REASON_PREV_AUTH_NOT_VALID);
7a947080 1138 else
60f8b39c
JB		 1139 mod_timer(&ifsta->timer, jiffies +
1140 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1141}
1142
1143
f698d856 1144static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1145 struct ieee80211_if_sta *ifsta)
1146{
f698d856 1147 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1148 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1149 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1150}
1151
1152
f698d856 1153static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1154 struct ieee80211_if_sta *ifsta,
1155 struct ieee80211_mgmt *mgmt,
1156 size_t len)
1157{
1158 u8 *pos;
1159 struct ieee802_11_elems elems;
1160
f0706e82 1161 pos = mgmt->u.auth.variable;
67a4cce4 1162 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1163 if (!elems.challenge)
f0706e82 1164 return;
f698d856 1165 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1166 elems.challenge_len + 2, 1);
1167}
1168
fe3d2c3f
JB		 1169static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
1170 struct ieee80211_if_sta *ifsta,
1171 struct ieee80211_mgmt *mgmt,
1172 size_t len)
1173{
1174 u16 auth_alg, auth_transaction, status_code;
1175
1176 if (len < 24 + 6)
1177 return;
1178
1179 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1180 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1181 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1182
1183 /*
1184 * IEEE 802.11 standard does not require authentication in IBSS
1185 * networks and most implementations do not seem to use it.
1186 * However, try to reply to authentication attempts if someone
1187 * has actually implemented this.
1188 */
1189 if (auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1)
1190 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1191}
1192
f698d856 1193static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1194 struct ieee80211_if_sta *ifsta,
1195 struct ieee80211_mgmt *mgmt,
1196 size_t len)
1197{
f0706e82
JB		 1198 u16 auth_alg, auth_transaction, status_code;
1199
fe3d2c3f 1200 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE)
f0706e82 1201 return;
f0706e82 1202
f4ea83dd 1203 if (len < 24 + 6)
f0706e82 1204 return;
f0706e82 1205
fe3d2c3f 1206 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1207 return;
f0706e82 1208
fe3d2c3f 1209 if (memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1210 return;
f0706e82
JB		 1211
1212 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1213 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1214 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1215
f0706e82 1216 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1217 auth_transaction != ifsta->auth_transaction)
f0706e82 1218 return;
f0706e82
JB		 1219
1220 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1221 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1222 u8 algs[3];
1223 const int num_algs = ARRAY_SIZE(algs);
1224 int i, pos;
1225 algs[0] = algs[1] = algs[2] = 0xff;
1226 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1227 algs[0] = WLAN_AUTH_OPEN;
1228 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1229 algs[1] = WLAN_AUTH_SHARED_KEY;
1230 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1231 algs[2] = WLAN_AUTH_LEAP;
1232 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1233 pos = 0;
1234 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1235 pos = 1;
1236 else
1237 pos = 2;
1238 for (i = 0; i < num_algs; i++) {
1239 pos++;
1240 if (pos >= num_algs)
1241 pos = 0;
1242 if (algs[pos] == ifsta->auth_alg ||
1243 algs[pos] == 0xff)
1244 continue;
1245 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1246 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1247 continue;
1248 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1249 break;
1250 }
1251 }
1252 return;
1253 }
1254
1255 switch (ifsta->auth_alg) {
1256 case WLAN_AUTH_OPEN:
1257 case WLAN_AUTH_LEAP:
f698d856 1258 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1259 break;
1260 case WLAN_AUTH_SHARED_KEY:
1261 if (ifsta->auth_transaction == 4)
f698d856 1262 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1263 else
f698d856 1264 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1265 break;
1266 }
1267}
1268
1269
f698d856 1270static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1271 struct ieee80211_if_sta *ifsta,
1272 struct ieee80211_mgmt *mgmt,
1273 size_t len)
1274{
1275 u16 reason_code;
1276
f4ea83dd 1277 if (len < 24 + 2)
f0706e82 1278 return;
f0706e82 1279
f4ea83dd 1280 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1281 return;
f0706e82
JB		 1282
1283 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1284
988c0f72 1285 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1286 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1287 sdata->dev->name, reason_code);
f0706e82 1288
48c2fc59
TW		 1289 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1290 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1291 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1292 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1293 mod_timer(&ifsta->timer, jiffies +
1294 IEEE80211_RETRY_AUTH_INTERVAL);
1295 }
1296
aa458d17 1297 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1298 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1299}
1300
1301
f698d856 1302static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1303 struct ieee80211_if_sta *ifsta,
1304 struct ieee80211_mgmt *mgmt,
1305 size_t len)
1306{
1307 u16 reason_code;
1308
f4ea83dd 1309 if (len < 24 + 2)
f0706e82 1310 return;
f0706e82 1311
f4ea83dd 1312 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1313 return;
f0706e82
JB		 1314
1315 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1316
d6f2da5b 1317 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1318 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1319 sdata->dev->name, reason_code);
f0706e82 1320
48c2fc59
TW		 1321 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1322 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1323 mod_timer(&ifsta->timer, jiffies +
1324 IEEE80211_RETRY_AUTH_INTERVAL);
1325 }
1326
5925d976 1327 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB		 1328}
1329
1330
471b3efd 1331static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1332 struct ieee80211_if_sta *ifsta,
1333 struct ieee80211_mgmt *mgmt,
1334 size_t len,
1335 int reassoc)
1336{
471b3efd 1337 struct ieee80211_local *local = sdata->local;
8318d78a 1338 struct ieee80211_supported_band *sband;
f0706e82 1339 struct sta_info *sta;
881d948c 1340 u32 rates, basic_rates;
f0706e82
JB		 1341 u16 capab_info, status_code, aid;
1342 struct ieee802_11_elems elems;
bda3933a 1343 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1344 u8 *pos;
ae5eb026 1345 u32 changed = 0;
f0706e82 1346 int i, j;
ddf4ac53 1347 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1348 u16 ap_ht_cap_flags;
f0706e82
JB		 1349
1350 /* AssocResp and ReassocResp have identical structure, so process both
1351 * of them in this function. */
1352
48c2fc59 1353 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1354 return;
f0706e82 1355
f4ea83dd 1356 if (len < 24 + 6)
f0706e82 1357 return;
f0706e82 1358
f4ea83dd 1359 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1360 return;
f0706e82
JB		 1361
1362 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1363 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1364 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1365
0c68ae26 1366 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1367 "status=%d aid=%d)\n",
0c68ae26 1368 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1369 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1370
63a5ab82
JM		 1371 pos = mgmt->u.assoc_resp.variable;
1372 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1373
1374 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1375 elems.timeout_int && elems.timeout_int_len == 5 &&
1376 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1377 u32 tu, ms;
f797eb7e 1378 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1379 ms = tu * 1024 / 1000;
1380 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1381 "comeback duration %u TU (%u ms)\n",
1382 sdata->dev->name, tu, ms);
1383 if (ms > IEEE80211_ASSOC_TIMEOUT)
1384 mod_timer(&ifsta->timer,
1385 jiffies + msecs_to_jiffies(ms));
1386 return;
1387 }
1388
f0706e82
JB		 1389 if (status_code != WLAN_STATUS_SUCCESS) {
1390 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1391 sdata->dev->name, status_code);
8a69aa93
DD		 1392 /* if this was a reassociation, ensure we try a "full"
1393 * association next time. This works around some broken APs
1394 * which do not correctly reject reassociation requests. */
d6f2da5b 1395 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1396 return;
1397 }
1398
1dd84aa2
JB		 1399 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1400 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1401 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1402 aid &= ~(BIT(15) | BIT(14));
1403
f0706e82
JB		 1404 if (!elems.supp_rates) {
1405 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1406 sdata->dev->name);
f0706e82
JB		 1407 return;
1408 }
1409
f698d856 1410 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1411 ifsta->aid = aid;
1412 ifsta->ap_capab = capab_info;
1413
1414 kfree(ifsta->assocresp_ies);
1415 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1416 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1417 if (ifsta->assocresp_ies)
1418 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1419
d0709a65
JB		 1420 rcu_read_lock();
1421
f0706e82
JB		 1422 /* Add STA entry for the AP */
1423 sta = sta_info_get(local, ifsta->bssid);
1424 if (!sta) {
ddf4ac53 1425 newsta = true;
d0709a65 1426
73651ee6
JB		 1427 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1428 if (!sta) {
1429 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1430 " the AP\n", sdata->dev->name);
d0709a65 1431 rcu_read_unlock();
f0706e82
JB		 1432 return;
1433 }
f709fc69 1434
60f8b39c
JB		 1435 /* update new sta with its last rx activity */
1436 sta->last_rx = jiffies;
f709fc69 1437 }
f709fc69 1438
60f8b39c
JB		 1439 /*
1440 * FIXME: Do we really need to update the sta_info's information here?
1441 * We already know about the AP (we found it in our list) so it
1442 * should already be filled with the right info, no?
1443 * As is stands, all this is racy because typically we assume
1444 * the information that is filled in here (except flags) doesn't
1445 * change while a STA structure is alive. As such, it should move
1446 * to between the sta_info_alloc() and sta_info_insert() above.
1447 */
f709fc69 1448
60f8b39c
JB		 1449 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1450 WLAN_STA_AUTHORIZED);
05e5e883 1451
60f8b39c
JB		 1452 rates = 0;
1453 basic_rates = 0;
1454 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1455
60f8b39c
JB		 1456 for (i = 0; i < elems.supp_rates_len; i++) {
1457 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1458 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1459
60f8b39c
JB		 1460 if (rate > 110)
1461 have_higher_than_11mbit = true;
1462
1463 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1464 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1465 rates |= BIT(j);
d61272cb
TW		 1466 if (is_basic)
1467 basic_rates |= BIT(j);
1468 break;
1469 }
f709fc69 1470 }
f709fc69
LCC		 1471 }
1472
60f8b39c
JB		 1473 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1474 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1475 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1476
60f8b39c
JB		 1477 if (rate > 110)
1478 have_higher_than_11mbit = true;
f0706e82 1479
60f8b39c 1480 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1481 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1482 rates |= BIT(j);
d61272cb
TW		 1483 if (is_basic)
1484 basic_rates |= BIT(j);
1485 break;
1486 }
60f8b39c 1487 }
1ebebea8 1488 }
f0706e82 1489
323ce79a 1490 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1491 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1492
1493 /* cf. IEEE 802.11 9.2.12 */
1494 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1495 have_higher_than_11mbit)
1496 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1497 else
1498 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1499
ae5eb026
JB		 1500 if (elems.ht_cap_elem)
1501 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1502 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1503
1504 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1505
4b7679a5 1506 rate_control_rate_init(sta);
f0706e82 1507
5394af4d
JM		 1508 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1509 set_sta_flags(sta, WLAN_STA_MFP);
1510
ddf4ac53 1511 if (elems.wmm_param)
60f8b39c 1512 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1513
1514 if (newsta) {
1515 int err = sta_info_insert(sta);
1516 if (err) {
1517 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1518 " the AP (error %d)\n", sdata->dev->name, err);
1519 rcu_read_unlock();
1520 return;
1521 }
1522 }
1523
1524 rcu_read_unlock();
1525
1526 if (elems.wmm_param)
60f8b39c
JB		 1527 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1528 elems.wmm_param_len);
f0706e82 1529
ae5eb026
JB		 1530 if (elems.ht_info_elem && elems.wmm_param &&
1531 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1532 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1533 ap_ht_cap_flags);
1534
60f8b39c
JB		 1535 /* set AID and assoc capability,
1536 * ieee80211_set_associated() will tell the driver */
1537 bss_conf->aid = aid;
1538 bss_conf->assoc_capability = capab_info;
ae5eb026 1539 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1540
60f8b39c 1541 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1542}
1543
1544
99cf5f5f
JB		 1545static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1546 struct ieee80211_if_sta *ifsta,
1547 const u8 *bssid, const int beacon_int,
1548 const int freq,
1549 const size_t supp_rates_len,
1550 const u8 *supp_rates,
1551 const u16 capability)
a607268a 1552{
f698d856 1553 struct ieee80211_local *local = sdata->local;
c4e3a584 1554 int res = 0, rates, i, j;
a607268a
BR		 1555 struct sk_buff *skb;
1556 struct ieee80211_mgmt *mgmt;
a607268a 1557 u8 *pos;
a607268a 1558 struct ieee80211_supported_band *sband;
507b06d0 1559 union iwreq_data wrqu;
a607268a 1560
c4e3a584
AF		 1561 if (local->ops->reset_tsf) {
1562 /* Reset own TSF to allow time synchronization work. */
1563 local->ops->reset_tsf(local_to_hw(local));
1564 }
1565
1566 if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
99cf5f5f 1567 memcmp(ifsta->bssid, bssid, ETH_ALEN) == 0)
c4e3a584
AF		 1568 return res;
1569
9aed3cc1
JM		 1570 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1571 sdata->u.sta.ie_proberesp_len);
e2ef12d3
RR		 1572 if (!skb) {
1573 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1574 "response\n", sdata->dev->name);
1575 return -ENOMEM;
1576 }
1577
c4e3a584
AF		 1578 if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
1579 /* Remove possible STA entries from other IBSS networks. */
1580 sta_info_flush_delayed(sdata);
a607268a 1581 }
c4e3a584 1582
99cf5f5f 1583 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81 1584 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1585 if (res)
1586 return res;
1587
99cf5f5f 1588 local->hw.conf.beacon_int = beacon_int >= 10 ? beacon_int : 10;
a607268a 1589
99cf5f5f 1590 sdata->drop_unencrypted = capability &
a607268a
BR		 1591 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1592
99cf5f5f 1593 res = ieee80211_set_freq(sdata, freq);
a607268a 1594
be038b37
AK		 1595 if (res)
1596 return res;
a607268a 1597
99cf5f5f
JB		 1598 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1599
9d139c81 1600 /* Build IBSS probe response */
a607268a 1601
e2ef12d3 1602 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1603
e2ef12d3
RR		 1604 mgmt = (struct ieee80211_mgmt *)
1605 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1606 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1607 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
99cf5f5f 1608 IEEE80211_STYPE_PROBE_RESP);
e2ef12d3
RR		 1609 memset(mgmt->da, 0xff, ETH_ALEN);
1610 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1611 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1612 mgmt->u.beacon.beacon_int =
1613 cpu_to_le16(local->hw.conf.beacon_int);
99cf5f5f 1614 mgmt->u.beacon.capab_info = cpu_to_le16(capability);
a607268a 1615
e2ef12d3
RR		 1616 pos = skb_put(skb, 2 + ifsta->ssid_len);
1617 *pos++ = WLAN_EID_SSID;
1618 *pos++ = ifsta->ssid_len;
1619 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1620
99cf5f5f 1621 rates = supp_rates_len;
e2ef12d3
RR		 1622 if (rates > 8)
1623 rates = 8;
1624 pos = skb_put(skb, 2 + rates);
1625 *pos++ = WLAN_EID_SUPP_RATES;
1626 *pos++ = rates;
99cf5f5f 1627 memcpy(pos, supp_rates, rates);
e2ef12d3 1628
99cf5f5f 1629 if (sband->band == IEEE80211_BAND_2GHZ) {
e2ef12d3
RR		 1630 pos = skb_put(skb, 2 + 1);
1631 *pos++ = WLAN_EID_DS_PARAMS;
1632 *pos++ = 1;
99cf5f5f 1633 *pos++ = ieee80211_frequency_to_channel(freq);
e2ef12d3 1634 }
a607268a 1635
e2ef12d3
RR		 1636 pos = skb_put(skb, 2 + 2);
1637 *pos++ = WLAN_EID_IBSS_PARAMS;
1638 *pos++ = 2;
1639 /* FIX: set ATIM window based on scan results */
1640 *pos++ = 0;
1641 *pos++ = 0;
e039fa4a 1642
99cf5f5f
JB		 1643 if (supp_rates_len > 8) {
1644 rates = supp_rates_len - 8;
e2ef12d3
RR		 1645 pos = skb_put(skb, 2 + rates);
1646 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1647 *pos++ = rates;
99cf5f5f 1648 memcpy(pos, &supp_rates[8], rates);
9d139c81 1649 }
a607268a 1650
9aed3cc1
JM		 1651 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1652 sdata->u.sta.ie_proberesp_len);
1653
e2ef12d3
RR		 1654 ifsta->probe_resp = skb;
1655
078e1e60
JB		 1656 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1657 IEEE80211_IFCC_BEACON_ENABLED);
e2ef12d3
RR		 1658
1659
9d139c81 1660 rates = 0;
99cf5f5f
JB		 1661 for (i = 0; i < supp_rates_len; i++) {
1662 int bitrate = (supp_rates[i] & 0x7f) * 5;
9d139c81
JB		 1663 for (j = 0; j < sband->n_bitrates; j++)
1664 if (sband->bitrates[j].bitrate == bitrate)
1665 rates |= BIT(j);
a607268a 1666 }
9d139c81
JB		 1667 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1668
99cf5f5f 1669 ieee80211_sta_def_wmm_params(sdata, supp_rates_len, supp_rates);
a607268a 1670
dfe67012 1671 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
48c2fc59 1672 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1673 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1674
4492bea6
EG		 1675 ieee80211_led_assoc(local, true);
1676
507b06d0 1677 memset(&wrqu, 0, sizeof(wrqu));
99cf5f5f 1678 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
f698d856 1679 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1680
1681 return res;
1682}
1683
99cf5f5f
JB		 1684static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1685 struct ieee80211_if_sta *ifsta,
1686 struct ieee80211_bss *bss)
1687{
1688 return __ieee80211_sta_join_ibss(sdata, ifsta,
00d3f14c
JB		 1689 bss->cbss.bssid,
1690 bss->cbss.beacon_interval,
1691 bss->cbss.channel->center_freq,
99cf5f5f 1692 bss->supp_rates_len, bss->supp_rates,
00d3f14c 1693 bss->cbss.capability);
99cf5f5f
JB		 1694}
1695
98c8fccf
JB		 1696static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1697 struct ieee80211_mgmt *mgmt,
1698 size_t len,
1699 struct ieee80211_rx_status *rx_status,
1700 struct ieee802_11_elems *elems,
1701 bool beacon)
1702{
1703 struct ieee80211_local *local = sdata->local;
1704 int freq;
c2b13452 1705 struct ieee80211_bss *bss;
98c8fccf
JB		 1706 struct sta_info *sta;
1707 struct ieee80211_channel *channel;
1708 u64 beacon_timestamp, rx_timestamp;
881d948c 1709 u32 supp_rates = 0;
98c8fccf 1710 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 1711
1712 if (elems->ds_params && elems->ds_params_len == 1)
1713 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1714 else
1715 freq = rx_status->freq;
1716
1717 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1718
1719 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1720 return;
1721
05c914fe 1722 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1723 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1724 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1725
1726 rcu_read_lock();
1727
1728 sta = sta_info_get(local, mgmt->sa);
1729 if (sta) {
881d948c 1730 u32 prev_rates;
98c8fccf 1731
323ce79a 1732 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1733 /* make sure mandatory rates are always added */
323ce79a 1734 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1735 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1736
1737#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1738 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1739 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1740 "for %pM based on beacon info (0x%llx | "
98c8fccf 1741 "0x%llx -> 0x%llx)\n",
17741cdc 1742 sdata->dev->name,
0c68ae26 1743 sta->sta.addr,
98c8fccf
JB		 1744 (unsigned long long) prev_rates,
1745 (unsigned long long) supp_rates,
323ce79a 1746 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1747#endif
1748 } else {
ab1f5c0b 1749 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB		 1750 }
1751
1752 rcu_read_unlock();
1753 }
1754
1755 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1756 channel, beacon);
98c8fccf
JB		 1757 if (!bss)
1758 return;
1759
c481ec97
S		 1760 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1761 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1762 struct ieee80211_channel_sw_ie *sw_elem =
1763 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1764 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1765 }
1766
98c8fccf 1767 /* was just updated in ieee80211_bss_info_update */
00d3f14c 1768 beacon_timestamp = bss->cbss.tsf;
98c8fccf 1769
fe3d2c3f
JB		 1770 if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
1771 goto put_bss;
30b89b0f 1772
9d9bf77d 1773 /* check if we need to merge IBSS */
fe3d2c3f
JB		 1774
1775 /* merge only on beacons (???) */
1776 if (!beacon)
1777 goto put_bss;
1778
1779 /* we use a fixed BSSID */
1780 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)
1781 goto put_bss;
1782
1783 /* not an IBSS */
1784 if (!(bss->cbss.capability & WLAN_CAPABILITY_IBSS))
1785 goto put_bss;
1786
1787 /* different channel */
1788 if (bss->cbss.channel != local->oper_channel)
1789 goto put_bss;
1790
1791 /* different SSID */
1792 if (elems->ssid_len != sdata->u.sta.ssid_len ||
ae6a44e3 1793 memcmp(elems->ssid, sdata->u.sta.ssid,
fe3d2c3f
JB		 1794 sdata->u.sta.ssid_len))
1795 goto put_bss;
1796
1797 if (rx_status->flag & RX_FLAG_TSFT) {
1798 /*
1799 * For correct IBSS merging we need mactime; since mactime is
1800 * defined as the time the first data symbol of the frame hits
1801 * the PHY, and the timestamp of the beacon is defined as "the
1802 * time that the data symbol containing the first bit of the
1803 * timestamp is transmitted to the PHY plus the transmitting
1804 * STA's delays through its local PHY from the MAC-PHY
1805 * interface to its interface with the WM" (802.11 11.1.2)
1806 * - equals the time this bit arrives at the receiver - we have
1807 * to take into account the offset between the two.
1808 *
1809 * E.g. at 1 MBit that means mactime is 192 usec earlier
1810 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1811 */
1812 int rate;
1813
1814 if (rx_status->flag & RX_FLAG_HT)
1815 rate = 65; /* TODO: HT rates */
9d9bf77d 1816 else
fe3d2c3f
JB		 1817 rate = local->hw.wiphy->bands[band]->
1818 bitrates[rx_status->rate_idx].bitrate;
1819
1820 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1821 } else if (local && local->ops && local->ops->get_tsf)
1822 /* second best option: get current TSF */
1823 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1824 else
1825 /* can't merge without knowing the TSF */
1826 rx_timestamp = -1LLU;
1827
9d9bf77d 1828#ifdef CONFIG_MAC80211_IBSS_DEBUG
fe3d2c3f
JB		 1829 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1830 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1831 mgmt->sa, mgmt->bssid,
1832 (unsigned long long)rx_timestamp,
1833 (unsigned long long)beacon_timestamp,
1834 (unsigned long long)(rx_timestamp - beacon_timestamp),
1835 jiffies);
1836#endif
1837
1838 if (beacon_timestamp > rx_timestamp) {
576fdeae 1839#ifdef CONFIG_MAC80211_IBSS_DEBUG
fe3d2c3f
JB		 1840 printk(KERN_DEBUG "%s: beacon TSF higher than "
1841 "local TSF - IBSS merge with BSSID %pM\n",
1842 sdata->dev->name, mgmt->bssid);
fba4a1e6 1843#endif
fe3d2c3f
JB		 1844 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
1845 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR		 1846 }
1847
fe3d2c3f 1848 put_bss:
3e122be0 1849 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1850}
1851
1852
f698d856 1853static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1854 struct ieee80211_mgmt *mgmt,
1855 size_t len,
1856 struct ieee80211_rx_status *rx_status)
1857{
ae6a44e3
EK		 1858 size_t baselen;
1859 struct ieee802_11_elems elems;
9859b81e 1860 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1861
8e7cdbb6
TW		 1862 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1863 return; /* ignore ProbeResp to foreign address */
1864
ae6a44e3
EK		 1865 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1866 if (baselen > len)
1867 return;
1868
1869 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1870 &elems);
1871
98c8fccf 1872 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1873
1874 /* direct probe may be part of the association flow */
1875 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1876 &ifsta->request)) {
1877 printk(KERN_DEBUG "%s direct probe responded\n",
1878 sdata->dev->name);
1879 ieee80211_authenticate(sdata, ifsta);
1880 }
f0706e82
JB		 1881}
1882
1883
f698d856 1884static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1885 struct ieee80211_mgmt *mgmt,
1886 size_t len,
1887 struct ieee80211_rx_status *rx_status)
1888{
f0706e82 1889 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1890 size_t baselen;
1891 struct ieee802_11_elems elems;
f698d856 1892 struct ieee80211_local *local = sdata->local;
471b3efd 1893 u32 changed = 0;
1fb3606b 1894 bool erp_valid, directed_tim;
7a5158ef 1895 u8 erp_value = 0;
f0706e82 1896
ae6a44e3
EK		 1897 /* Process beacon from the current BSS */
1898 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1899 if (baselen > len)
1900 return;
1901
1902 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1903
98c8fccf 1904 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1905
05c914fe 1906 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1907 return;
1908 ifsta = &sdata->u.sta;
1909
d6f2da5b 1910 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1911 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1912 return;
1913
c481ec97
S		 1914 if (rx_status->freq != local->hw.conf.channel->center_freq)
1915 return;
1916
fe3fa827
JB		 1917 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1918 elems.wmm_param_len);
1919
4be8c387
JB		 1920 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1921 local->hw.conf.flags & IEEE80211_CONF_PS) {
1fb3606b 1922 directed_tim = ieee80211_check_tim(&elems, ifsta->aid);
a97b77b9 1923
1fb3606b 1924 if (directed_tim) {
572e0012
KV		 1925 if (local->hw.conf.dynamic_ps_timeout > 0) {
1926 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1927 ieee80211_hw_config(local,
1928 IEEE80211_CONF_CHANGE_PS);
1929 ieee80211_send_nullfunc(local, sdata, 0);
1930 } else {
1931 local->pspolling = true;
1932
1933 /*
1934 * Here is assumed that the driver will be
1935 * able to send ps-poll frame and receive a
1936 * response even though power save mode is
1937 * enabled, but some drivers might require
1938 * to disable power save here. This needs
1939 * to be investigated.
1940 */
1941 ieee80211_send_pspoll(local, sdata);
1942 }
a97b77b9
VN		 1943 }
1944 }
7a5158ef
JB		 1945
1946 if (elems.erp_info && elems.erp_info_len >= 1) {
1947 erp_valid = true;
1948 erp_value = elems.erp_info[0];
1949 } else {
1950 erp_valid = false;
50c4afb9 1951 }
7a5158ef
JB		 1952 changed |= ieee80211_handle_bss_capability(sdata,
1953 le16_to_cpu(mgmt->u.beacon.capab_info),
1954 erp_valid, erp_value);
f0706e82 1955
d3c990fb 1956
ae5eb026
JB		 1957 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1958 struct sta_info *sta;
1959 struct ieee80211_supported_band *sband;
1960 u16 ap_ht_cap_flags;
1961
1962 rcu_read_lock();
1963
1964 sta = sta_info_get(local, ifsta->bssid);
1965 if (!sta) {
1966 rcu_read_unlock();
1967 return;
1968 }
1969
1970 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1971
1972 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1973 elems.ht_cap_elem, &sta->sta.ht_cap);
1974
1975 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1976
1977 rcu_read_unlock();
1978
1979 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1980 ap_ht_cap_flags);
d3c990fb
RR		 1981 }
1982
3f2355cb
LR		 1983 if (elems.country_elem) {
1984 /* Note we are only reviewing this on beacons
1985 * for the BSSID we are associated to */
1986 regulatory_hint_11d(local->hw.wiphy,
1987 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1988
1989 /* TODO: IBSS also needs this */
1990 if (elems.pwr_constr_elem)
1991 ieee80211_handle_pwr_constr(sdata,
1992 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1993 elems.pwr_constr_elem,
1994 elems.pwr_constr_elem_len);
3f2355cb
LR		 1995 }
1996
471b3efd 1997 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1998}
1999
2000
f698d856 2001static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2002 struct ieee80211_if_sta *ifsta,
2003 struct ieee80211_mgmt *mgmt,
504a71e4 2004 size_t len)
f0706e82 2005{
f698d856 2006 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2007 int tx_last_beacon;
2008 struct sk_buff *skb;
2009 struct ieee80211_mgmt *resp;
2010 u8 *pos, *end;
2011
fe3d2c3f 2012 if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2013 len < 24 + 2 || !ifsta->probe_resp)
2014 return;
2015
2016 if (local->ops->tx_last_beacon)
2017 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2018 else
2019 tx_last_beacon = 1;
2020
2021#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 2022 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
2023 " (tx_last_beacon=%d)\n",
2024 sdata->dev->name, mgmt->sa, mgmt->da,
2025 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 2026#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2027
2028 if (!tx_last_beacon)
2029 return;
2030
2031 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2032 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2033 return;
2034
2035 end = ((u8 *) mgmt) + len;
2036 pos = mgmt->u.probe_req.variable;
2037 if (pos[0] != WLAN_EID_SSID ||
2038 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2039#ifdef CONFIG_MAC80211_IBSS_DEBUG
2040 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 2041 "from %pM\n",
2042 sdata->dev->name, mgmt->sa);
f4ea83dd 2043#endif
f0706e82
JB		 2044 return;
2045 }
2046 if (pos[1] != 0 &&
2047 (pos[1] != ifsta->ssid_len ||
2048 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2049 /* Ignore ProbeReq for foreign SSID */
2050 return;
2051 }
2052
2053 /* Reply with ProbeResp */
0ec0b7ac 2054 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2055 if (!skb)
2056 return;
2057
2058 resp = (struct ieee80211_mgmt *) skb->data;
2059 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2060#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 2061 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
2062 sdata->dev->name, resp->da);
f0706e82 2063#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 2064 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 2065}
2066
f698d856 2067void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2068 struct ieee80211_rx_status *rx_status)
2069{
f698d856 2070 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2071 struct ieee80211_if_sta *ifsta;
2072 struct ieee80211_mgmt *mgmt;
2073 u16 fc;
2074
2075 if (skb->len < 24)
2076 goto fail;
2077
f0706e82
JB		 2078 ifsta = &sdata->u.sta;
2079
2080 mgmt = (struct ieee80211_mgmt *) skb->data;
2081 fc = le16_to_cpu(mgmt->frame_control);
2082
2083 switch (fc & IEEE80211_FCTL_STYPE) {
2084 case IEEE80211_STYPE_PROBE_REQ:
2085 case IEEE80211_STYPE_PROBE_RESP:
2086 case IEEE80211_STYPE_BEACON:
2087 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2088 case IEEE80211_STYPE_AUTH:
2089 case IEEE80211_STYPE_ASSOC_RESP:
2090 case IEEE80211_STYPE_REASSOC_RESP:
2091 case IEEE80211_STYPE_DEAUTH:
2092 case IEEE80211_STYPE_DISASSOC:
2093 skb_queue_tail(&ifsta->skb_queue, skb);
2094 queue_work(local->hw.workqueue, &ifsta->work);
2095 return;
f0706e82
JB		 2096 }
2097
2098 fail:
2099 kfree_skb(skb);
2100}
2101
f698d856 2102static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2103 struct sk_buff *skb)
2104{
2105 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2106 struct ieee80211_if_sta *ifsta;
2107 struct ieee80211_mgmt *mgmt;
2108 u16 fc;
2109
f0706e82
JB		 2110 ifsta = &sdata->u.sta;
2111
2112 rx_status = (struct ieee80211_rx_status *) skb->cb;
2113 mgmt = (struct ieee80211_mgmt *) skb->data;
2114 fc = le16_to_cpu(mgmt->frame_control);
2115
fe3d2c3f
JB		 2116 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
2117 switch (fc & IEEE80211_FCTL_STYPE) {
2118 case IEEE80211_STYPE_PROBE_REQ:
2119 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt,
2120 skb->len);
2121 break;
2122 case IEEE80211_STYPE_PROBE_RESP:
2123 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2124 rx_status);
2125 break;
2126 case IEEE80211_STYPE_BEACON:
2127 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2128 rx_status);
2129 break;
2130 case IEEE80211_STYPE_AUTH:
2131 ieee80211_rx_mgmt_auth_ibss(sdata, ifsta, mgmt,
2132 skb->len);
2133 break;
2134 }
2135 } else { /* NL80211_IFTYPE_STATION */
2136 switch (fc & IEEE80211_FCTL_STYPE) {
2137 case IEEE80211_STYPE_PROBE_RESP:
2138 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len,
2139 rx_status);
2140 break;
2141 case IEEE80211_STYPE_BEACON:
2142 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
2143 rx_status);
2144 break;
2145 case IEEE80211_STYPE_AUTH:
2146 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2147 break;
2148 case IEEE80211_STYPE_ASSOC_RESP:
2149 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt,
2150 skb->len, 0);
2151 break;
2152 case IEEE80211_STYPE_REASSOC_RESP:
2153 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt,
2154 skb->len, 1);
2155 break;
2156 case IEEE80211_STYPE_DEAUTH:
2157 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2158 break;
2159 case IEEE80211_STYPE_DISASSOC:
2160 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt,
2161 skb->len);
2162 break;
2163 }
f0706e82
JB		 2164 }
2165
2166 kfree_skb(skb);
2167}
2168
2169
f698d856 2170static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2171{
f698d856 2172 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2173 int active = 0;
2174 struct sta_info *sta;
2175
d0709a65
JB		 2176 rcu_read_lock();
2177
2178 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2179 if (sta->sdata == sdata &&
f0706e82
JB		 2180 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2181 jiffies)) {
2182 active++;
2183 break;
2184 }
2185 }
d0709a65
JB		 2186
2187 rcu_read_unlock();
f0706e82
JB		 2188
2189 return active;
2190}
2191
2192
f698d856 2193static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2194 struct ieee80211_if_sta *ifsta)
2195{
2196 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2197
f698d856
JBG		 2198 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2199 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2200 return;
2201
137f9f46
AF		 2202 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2203 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2204 return;
2205
f0706e82 2206 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 2207 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2a519311
JB		 2208
2209 /* XXX maybe racy? */
2210 if (sdata->local->scan_req)
2211 return;
2212
2213 memcpy(sdata->local->int_scan_req.ssids[0].ssid,
2214 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
2215 sdata->local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2216 ieee80211_request_scan(sdata, &sdata->local->int_scan_req);
f0706e82
JB		 2217}
2218
2219
9c6bd790 2220static void ieee80211_sta_timer(unsigned long data)
f0706e82 2221{
60f8b39c
JB		 2222 struct ieee80211_sub_if_data *sdata =
2223 (struct ieee80211_sub_if_data *) data;
2224 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2225 struct ieee80211_local *local = sdata->local;
f0706e82 2226
60f8b39c
JB		 2227 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2228 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2229}
2230
f698d856 2231static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2232 struct ieee80211_if_sta *ifsta)
2233{
f698d856 2234 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2235
2236 if (local->ops->reset_tsf) {
2237 /* Reset own TSF to allow time synchronization work. */
2238 local->ops->reset_tsf(local_to_hw(local));
2239 }
2240
2241 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2242
2243
2244 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2245 ifsta->auth_alg = WLAN_AUTH_OPEN;
2246 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2247 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2248 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2249 ifsta->auth_alg = WLAN_AUTH_LEAP;
2250 else
2251 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2252 ifsta->auth_transaction = -1;
d6f2da5b 2253 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2254 ifsta->assoc_scan_tries = 0;
9859b81e 2255 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2256 ifsta->auth_tries = 0;
2257 ifsta->assoc_tries = 0;
24e64622 2258 netif_tx_stop_all_queues(sdata->dev);
f698d856 2259 netif_carrier_off(sdata->dev);
f0706e82
JB		 2260}
2261
f698d856 2262static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2263 struct ieee80211_if_sta *ifsta)
2264{
f698d856 2265 struct ieee80211_local *local = sdata->local;
8318d78a 2266 struct ieee80211_supported_band *sband;
99cf5f5f
JB		 2267 u8 *pos;
2268 u8 bssid[ETH_ALEN];
2269 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
2270 u16 capability;
f0706e82
JB		 2271 int i;
2272
dfe67012
AF		 2273 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2274 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2275 } else {
2276 /* Generate random, not broadcast, locally administered BSSID. Mix in
2277 * own MAC address to make sure that devices that do not have proper
2278 * random number generator get different BSSID. */
2279 get_random_bytes(bssid, ETH_ALEN);
2280 for (i = 0; i < ETH_ALEN; i++)
2281 bssid[i] ^= sdata->dev->dev_addr[i];
2282 bssid[0] &= ~0x01;
2283 bssid[0] |= 0x02;
2284 }
f0706e82 2285
0c68ae26
JB		 2286 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2287 sdata->dev->name, bssid);
f0706e82 2288
99cf5f5f 2289 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f0706e82
JB		 2290
2291 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2292 local->hw.conf.beacon_int = 100;
99cf5f5f
JB		 2293
2294 capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2295
2296 if (sdata->default_key)
99cf5f5f 2297 capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2298 else
f0706e82 2299 sdata->drop_unencrypted = 0;
988c0f72 2300
99cf5f5f 2301 pos = supp_rates;
8318d78a
JB		 2302 for (i = 0; i < sband->n_bitrates; i++) {
2303 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2304 *pos++ = (u8) (rate / 5);
2305 }
2306
99cf5f5f
JB		 2307 return __ieee80211_sta_join_ibss(sdata, ifsta,
2308 bssid, local->hw.conf.beacon_int,
2309 local->hw.conf.channel->center_freq,
2310 sband->n_bitrates, supp_rates,
2311 capability);
f0706e82
JB		 2312}
2313
2314
f698d856 2315static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2316 struct ieee80211_if_sta *ifsta)
2317{
f698d856 2318 struct ieee80211_local *local = sdata->local;
c2b13452 2319 struct ieee80211_bss *bss;
f0706e82
JB		 2320 int active_ibss;
2321
2322 if (ifsta->ssid_len == 0)
2323 return -EINVAL;
2324
f698d856 2325 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2326#ifdef CONFIG_MAC80211_IBSS_DEBUG
2327 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2328 sdata->dev->name, active_ibss);
f0706e82 2329#endif /* CONFIG_MAC80211_IBSS_DEBUG */
00d3f14c
JB		 2330
2331 if (active_ibss)
2332 return 0;
2333
2334 if (ifsta->flags & IEEE80211_STA_BSSID_SET)
2335 bss = ieee80211_rx_bss_get(local, ifsta->bssid, 0,
2336 ifsta->ssid, ifsta->ssid_len);
2337 else
2338 bss = (void *)cfg80211_get_ibss(local->hw.wiphy,
2339 NULL,
2340 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 2341
2342#ifdef CONFIG_MAC80211_IBSS_DEBUG
00d3f14c 2343 if (bss)
0c68ae26 2344 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
00d3f14c 2345 "%pM\n", bss->cbss.bssid, ifsta->bssid);
f0706e82 2346#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb 2347
00d3f14c
JB		 2348 if (bss &&
2349 (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) ||
2350 memcmp(ifsta->bssid, bss->cbss.bssid, ETH_ALEN))) {
167ad6f7 2351 int ret;
80693ceb 2352
0c68ae26 2353 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2354 " based on configured SSID\n",
00d3f14c
JB		 2355 sdata->dev->name, bss->cbss.bssid);
2356
f698d856 2357 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2358 ieee80211_rx_bss_put(local, bss);
167ad6f7 2359 return ret;
00d3f14c
JB		 2360 } else if (bss)
2361 ieee80211_rx_bss_put(local, bss);
80693ceb 2362
f0706e82
JB		 2363#ifdef CONFIG_MAC80211_IBSS_DEBUG
2364 printk(KERN_DEBUG " did not try to join ibss\n");
2365#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2366
2367 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2368 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2369 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2370 mod_timer(&ifsta->timer, jiffies +
2371 IEEE80211_IBSS_MERGE_INTERVAL);
2372 } else if (time_after(jiffies, local->last_scan_completed +
2373 IEEE80211_SCAN_INTERVAL)) {
2374 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2375 "join\n", sdata->dev->name);
2a519311
JB		 2376
2377 /* XXX maybe racy? */
2378 if (local->scan_req)
2379 return -EBUSY;
2380
2381 memcpy(local->int_scan_req.ssids[0].ssid,
2382 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
2383 local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2384 return ieee80211_request_scan(sdata, &local->int_scan_req);
48c2fc59 2385 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2386 int interval = IEEE80211_SCAN_INTERVAL;
2387
2388 if (time_after(jiffies, ifsta->ibss_join_req +
2389 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2390 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2391 (!(local->oper_channel->flags &
2392 IEEE80211_CHAN_NO_IBSS)))
f698d856 2393 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2394 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2395 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2396 " %d MHz\n", sdata->dev->name,
8318d78a 2397 local->hw.conf.channel->center_freq);
f0706e82
JB		 2398 }
2399
2400 /* No IBSS found - decrease scan interval and continue
2401 * scanning. */
2402 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2403 }
2404
48c2fc59 2405 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2406 mod_timer(&ifsta->timer, jiffies + interval);
2407 return 0;
2408 }
2409
2410 return 0;
2411}
2412
2413
9c6bd790
JB		 2414static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2415 struct ieee80211_if_sta *ifsta)
f0706e82 2416{
9c6bd790 2417 struct ieee80211_local *local = sdata->local;
00d3f14c
JB		 2418 struct ieee80211_bss *bss;
2419 u8 *bssid = ifsta->bssid, *ssid = ifsta->ssid;
2420 u8 ssid_len = ifsta->ssid_len;
2421 u16 capa_mask = WLAN_CAPABILITY_ESS;
2422 u16 capa_val = WLAN_CAPABILITY_ESS;
2423 struct ieee80211_channel *chan = local->oper_channel;
2424
2425 if (ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2426 IEEE80211_STA_AUTO_BSSID_SEL |
2427 IEEE80211_STA_AUTO_CHANNEL_SEL)) {
2428 capa_mask |= WLAN_CAPABILITY_PRIVACY;
2429 if (sdata->default_key)
2430 capa_val |= WLAN_CAPABILITY_PRIVACY;
f0706e82 2431 }
9d139c81 2432
00d3f14c
JB		 2433 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2434 chan = NULL;
2435
2436 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2437 bssid = NULL;
2438
2439 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) {
2440 ssid = NULL;
2441 ssid_len = 0;
2442 }
2443
2444 bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
2445 bssid, ssid, ssid_len,
2446 capa_mask, capa_val);
2447
2448 if (bss) {
2449 ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
9c6bd790 2450 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
00d3f14c
JB		 2451 ieee80211_sta_set_ssid(sdata, bss->ssid,
2452 bss->ssid_len);
2453 ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
2454 ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
2455 bss->supp_rates);
fdfacf0a
JM		 2456 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2457 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2458 else
2459 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2460
9c6bd790
JB		 2461 /* Send out direct probe if no probe resp was received or
2462 * the one we have is outdated
2463 */
00d3f14c
JB		 2464 if (!bss->last_probe_resp ||
2465 time_after(jiffies, bss->last_probe_resp
9c6bd790
JB		 2466 + IEEE80211_SCAN_RESULT_EXPIRE))
2467 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2468 else
2469 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2470
00d3f14c 2471 ieee80211_rx_bss_put(local, bss);
9c6bd790
JB		 2472 ieee80211_sta_reset_auth(sdata, ifsta);
2473 return 0;
2474 } else {
2475 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2476 ifsta->assoc_scan_tries++;
2a519311
JB		 2477 /* XXX maybe racy? */
2478 if (local->scan_req)
2479 return -1;
2480 memcpy(local->int_scan_req.ssids[0].ssid,
2481 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
9c6bd790 2482 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2a519311 2483 local->int_scan_req.ssids[0].ssid_len = 0;
9c6bd790 2484 else
2a519311
JB		 2485 local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2486 ieee80211_start_scan(sdata, &local->int_scan_req);
9c6bd790
JB		 2487 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2488 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
e374055a
S		 2489 } else {
2490 ifsta->assoc_scan_tries = 0;
9c6bd790 2491 ifsta->state = IEEE80211_STA_MLME_DISABLED;
e374055a 2492 }
9c6bd790
JB		 2493 }
2494 return -1;
2495}
2496
2497
2498static void ieee80211_sta_work(struct work_struct *work)
2499{
2500 struct ieee80211_sub_if_data *sdata =
2501 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2502 struct ieee80211_local *local = sdata->local;
2503 struct ieee80211_if_sta *ifsta;
2504 struct sk_buff *skb;
2505
2506 if (!netif_running(sdata->dev))
2507 return;
2508
c2b13452 2509 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2510 return;
2511
05c914fe
JB		 2512 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2513 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2514 return;
f0706e82
JB		 2515 ifsta = &sdata->u.sta;
2516
9c6bd790
JB		 2517 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2518 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2519
2520 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2521 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2522 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2523 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2a519311 2524 ieee80211_start_scan(sdata, local->scan_req);
9c6bd790 2525 return;
f0706e82
JB		 2526 }
2527
9c6bd790
JB		 2528 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2529 if (ieee80211_sta_config_auth(sdata, ifsta))
2530 return;
2531 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2532 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2533 return;
d6f2da5b 2534
9c6bd790
JB		 2535 switch (ifsta->state) {
2536 case IEEE80211_STA_MLME_DISABLED:
2537 break;
2538 case IEEE80211_STA_MLME_DIRECT_PROBE:
2539 ieee80211_direct_probe(sdata, ifsta);
2540 break;
2541 case IEEE80211_STA_MLME_AUTHENTICATE:
2542 ieee80211_authenticate(sdata, ifsta);
2543 break;
2544 case IEEE80211_STA_MLME_ASSOCIATE:
2545 ieee80211_associate(sdata, ifsta);
2546 break;
2547 case IEEE80211_STA_MLME_ASSOCIATED:
2548 ieee80211_associated(sdata, ifsta);
2549 break;
2550 case IEEE80211_STA_MLME_IBSS_SEARCH:
2551 ieee80211_sta_find_ibss(sdata, ifsta);
2552 break;
2553 case IEEE80211_STA_MLME_IBSS_JOINED:
2554 ieee80211_sta_merge_ibss(sdata, ifsta);
2555 break;
2556 default:
2557 WARN_ON(1);
2558 break;
2559 }
2560
2561 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2562 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2563 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2564
2565 ieee80211_set_disassoc(sdata, ifsta, false, true,
2566 WLAN_REASON_UNSPECIFIED);
2567 }
f0706e82
JB		 2568}
2569
9c6bd790
JB		 2570static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2571{
05c914fe 2572 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2573 queue_work(sdata->local->hw.workqueue,
2574 &sdata->u.sta.work);
2575}
f0706e82 2576
9c6bd790
JB		 2577/* interface setup */
2578void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2579{
9c6bd790 2580 struct ieee80211_if_sta *ifsta;
988c0f72 2581
9c6bd790
JB		 2582 ifsta = &sdata->u.sta;
2583 INIT_WORK(&ifsta->work, ieee80211_sta_work);
c481ec97 2584 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
9c6bd790 2585 setup_timer(&ifsta->timer, ieee80211_sta_timer,
c481ec97
S		 2586 (unsigned long) sdata);
2587 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790
JB		 2588 (unsigned long) sdata);
2589 skb_queue_head_init(&ifsta->skb_queue);
2590
2591 ifsta->capab = WLAN_CAPABILITY_ESS;
2592 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2593 IEEE80211_AUTH_ALG_SHARED_KEY;
2594 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2595 IEEE80211_STA_AUTO_BSSID_SEL |
2596 IEEE80211_STA_AUTO_CHANNEL_SEL;
2597 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2598 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2599}
2600
9c6bd790
JB		 2601/*
2602 * Add a new IBSS station, will also be called by the RX code when,
2603 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2604 * must be callable in atomic context.
2605 */
f698d856 2606struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
881d948c 2607 u8 *bssid,u8 *addr, u32 supp_rates)
f0706e82 2608{
f698d856 2609 struct ieee80211_local *local = sdata->local;
f0706e82 2610 struct sta_info *sta;
87291c02 2611 int band = local->hw.conf.channel->band;
f0706e82
JB		 2612
2613 /* TODO: Could consider removing the least recently used entry and
2614 * allow new one to be added. */
2615 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2616 if (net_ratelimit()) {
2617 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2618 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2619 }
2620 return NULL;
2621 }
2622
1e188637 2623 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2624 return NULL;
2625
f4ea83dd 2626#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2627 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2628 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2629#endif
f0706e82 2630
73651ee6
JB		 2631 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2632 if (!sta)
f0706e82
JB		 2633 return NULL;
2634
07346f81 2635 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2636
8e1535d5 2637 /* make sure mandatory rates are always added */
323ce79a 2638 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2639 ieee80211_mandatory_rates(local, band);
f0706e82 2640
4b7679a5 2641 rate_control_rate_init(sta);
f0706e82 2642
93e5deb1 2643 if (sta_info_insert(sta))
73651ee6 2644 return NULL;
73651ee6 2645
d0709a65 2646 return sta;
f0706e82
JB		 2647}
2648
9c6bd790
JB		 2649/* configuration hooks */
2650void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2651 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2652{
2653 struct ieee80211_local *local = sdata->local;
60f8b39c 2654
05c914fe 2655 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2656 return;
60f8b39c 2657
9c6bd790
JB		 2658 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2659 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2660 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2661 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2662
9c6bd790
JB		 2663 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2664 ieee80211_set_disassoc(sdata, ifsta, true, true,
2665 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2666
9c6bd790
JB		 2667 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2668 queue_work(local->hw.workqueue, &ifsta->work);
2669 }
2670}
60f8b39c 2671
9c6bd790
JB		 2672int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2673{
2674 struct ieee80211_if_sta *ifsta;
60f8b39c 2675
9c6bd790
JB		 2676 if (len > IEEE80211_MAX_SSID_LEN)
2677 return -EINVAL;
2678
2679 ifsta = &sdata->u.sta;
2680
2681 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2682 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2683 memcpy(ifsta->ssid, ssid, len);
2684 ifsta->ssid_len = len;
60f8b39c 2685 }
60f8b39c 2686
dfe67012
AF		 2687 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2688
9c6bd790
JB		 2689 if (len)
2690 ifsta->flags |= IEEE80211_STA_SSID_SET;
2691 else
2692 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2693
dfe67012 2694 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2695 ifsta->ibss_join_req = jiffies;
2696 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2697 return ieee80211_sta_find_ibss(sdata, ifsta);
2698 }
2699
2700 return 0;
2701}
2702
2703int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2704{
2705 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2706 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2707 *len = ifsta->ssid_len;
2708 return 0;
2709}
2710
2711int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2712{
2713 struct ieee80211_if_sta *ifsta;
9c6bd790
JB		 2714
2715 ifsta = &sdata->u.sta;
2716
dfe67012
AF		 2717 if (is_valid_ether_addr(bssid)) {
2718 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2719 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2720 } else {
2721 memset(ifsta->bssid, 0, ETH_ALEN);
2722 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2723 }
2724
2725 if (netif_running(sdata->dev)) {
2726 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 2727 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2728 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 2729 }
2730 }
60f8b39c 2731
dfe67012 2732 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
9c6bd790
JB		 2733}
2734
2735int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2736{
2737 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2738
2739 kfree(ifsta->extra_ie);
2740 if (len == 0) {
2741 ifsta->extra_ie = NULL;
2742 ifsta->extra_ie_len = 0;
60f8b39c 2743 return 0;
60f8b39c 2744 }
9c6bd790
JB		 2745 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2746 if (!ifsta->extra_ie) {
2747 ifsta->extra_ie_len = 0;
2748 return -ENOMEM;
2749 }
2750 memcpy(ifsta->extra_ie, ie, len);
2751 ifsta->extra_ie_len = len;
2752 return 0;
60f8b39c
JB		 2753}
2754
f698d856 2755int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2756{
f0706e82
JB		 2757 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2758
f4ea83dd 2759 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2760 sdata->dev->name, reason);
f0706e82 2761
05c914fe
JB		 2762 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2763 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2764 return -EINVAL;
2765
aa458d17 2766 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2767 return 0;
2768}
2769
f698d856 2770int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2771{
f0706e82
JB		 2772 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2773
f4ea83dd 2774 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2775 sdata->dev->name, reason);
f0706e82 2776
05c914fe 2777 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2778 return -EINVAL;
2779
d6f2da5b 2780 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2781 return -1;
2782
aa458d17 2783 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2784 return 0;
2785}
84363e6e 2786
9c6bd790
JB		 2787/* scan finished notification */
2788void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2789{
2790 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2791 struct ieee80211_if_sta *ifsta;
2792
05c914fe 2793 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790 2794 ifsta = &sdata->u.sta;
c0415b54
AF		 2795 if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2796 !ieee80211_sta_active_ibss(sdata))
9c6bd790
JB		 2797 ieee80211_sta_find_ibss(sdata, ifsta);
2798 }
2799
2800 /* Restart STA timers */
2801 rcu_read_lock();
2802 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2803 ieee80211_restart_sta_timer(sdata);
2804 rcu_read_unlock();
2805}
520eb820
KV		 2806
2807void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2808{
2809 struct ieee80211_local *local =
2810 container_of(work, struct ieee80211_local,
2811 dynamic_ps_disable_work);
2812
2813 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2814 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2815 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2816 }
2817
2818 ieee80211_wake_queues_by_reason(&local->hw,
2819 IEEE80211_QUEUE_STOP_REASON_PS);
2820}
2821
2822void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2823{
2824 struct ieee80211_local *local =
2825 container_of(work, struct ieee80211_local,
2826 dynamic_ps_enable_work);
a97b77b9 2827 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 2828
2829 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2830 return;
2831
4be8c387
JB		 2832 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2833 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2834
4be8c387 2835 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2836 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2837}
2838
2839void ieee80211_dynamic_ps_timer(unsigned long data)
2840{
2841 struct ieee80211_local *local = (void *) data;
2842
2843 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2844}
Linux kernel - Deliverables
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