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mac80211: remove useless non-NULL tests from scan results code
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
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
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
d0709a65 27#include <linux/rtnetlink.h>
f0706e82 28#include <net/iw_handler.h>
f0706e82 29#include <net/mac80211.h>
60f8b39c 30
f0706e82 31#include "ieee80211_i.h"
2c8dccc7
JB		 32#include "rate.h"
33#include "led.h"
f709fc69 34#include "mesh.h"
f0706e82 35
6042a3e3 36#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 37#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40#define IEEE80211_ASSOC_MAX_TRIES 3
41#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
f709fc69 42#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
f0706e82
JB		 43#define IEEE80211_PROBE_INTERVAL (60 * HZ)
44#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45#define IEEE80211_SCAN_INTERVAL (2 * HZ)
46#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 47#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82
JB		 48
49#define IEEE80211_PROBE_DELAY (HZ / 33)
50#define IEEE80211_CHANNEL_TIME (HZ / 33)
51#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 55#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 56
57#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
9c80d3dc 60/* mgmt header + 1 byte category code */
9f985b0e
RR		 61#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
62
63#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
64#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
65#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 66#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
67#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 68
07db2183
RR		 69/* next values represent the buffer size for A-MPDU frame.
70 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
71#define IEEE80211_MIN_AMPDU_BUF 0x8
72#define IEEE80211_MAX_AMPDU_BUF 0x40
73
60f8b39c 74/* BSS handling */
f0706e82 75static struct ieee80211_sta_bss *
f698d856 76ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
60f8b39c
JB		 77 u8 *ssid, u8 ssid_len)
78{
79 struct ieee80211_sta_bss *bss;
80
81 spin_lock_bh(&local->sta_bss_lock);
82 bss = local->sta_bss_hash[STA_HASH(bssid)];
83 while (bss) {
84 if (!bss_mesh_cfg(bss) &&
85 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
86 bss->freq == freq &&
87 bss->ssid_len == ssid_len &&
88 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
89 atomic_inc(&bss->users);
90 break;
91 }
92 bss = bss->hnext;
93 }
94 spin_unlock_bh(&local->sta_bss_lock);
95 return bss;
96}
97
98/* Caller must hold local->sta_bss_lock */
99static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
100 struct ieee80211_sta_bss *bss)
101{
102 u8 hash_idx;
103
104 if (bss_mesh_cfg(bss))
105 hash_idx = mesh_id_hash(bss_mesh_id(bss),
106 bss_mesh_id_len(bss));
107 else
108 hash_idx = STA_HASH(bss->bssid);
109
110 bss->hnext = local->sta_bss_hash[hash_idx];
111 local->sta_bss_hash[hash_idx] = bss;
112}
113
114/* Caller must hold local->sta_bss_lock */
115static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
116 struct ieee80211_sta_bss *bss)
117{
118 struct ieee80211_sta_bss *b, *prev = NULL;
119 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
120 while (b) {
121 if (b == bss) {
122 if (!prev)
123 local->sta_bss_hash[STA_HASH(bss->bssid)] =
124 bss->hnext;
125 else
126 prev->hnext = bss->hnext;
127 break;
128 }
129 prev = b;
130 b = b->hnext;
131 }
132}
133
134static struct ieee80211_sta_bss *
135ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
136 u8 *ssid, u8 ssid_len)
137{
138 struct ieee80211_local *local = sdata->local;
139 struct ieee80211_sta_bss *bss;
140
141 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
142 if (!bss)
143 return NULL;
144 atomic_inc(&bss->users);
145 atomic_inc(&bss->users);
146 memcpy(bss->bssid, bssid, ETH_ALEN);
147 bss->freq = freq;
148 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
149 memcpy(bss->ssid, ssid, ssid_len);
150 bss->ssid_len = ssid_len;
151 }
152
153 spin_lock_bh(&local->sta_bss_lock);
154 /* TODO: order by RSSI? */
155 list_add_tail(&bss->list, &local->sta_bss_list);
156 __ieee80211_rx_bss_hash_add(local, bss);
157 spin_unlock_bh(&local->sta_bss_lock);
158 return bss;
159}
160
161#ifdef CONFIG_MAC80211_MESH
162static struct ieee80211_sta_bss *
163ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
164 u8 *mesh_cfg, int freq)
165{
166 struct ieee80211_sta_bss *bss;
167
168 spin_lock_bh(&local->sta_bss_lock);
169 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
170 while (bss) {
171 if (bss_mesh_cfg(bss) &&
172 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
173 bss->freq == freq &&
174 mesh_id_len == bss->mesh_id_len &&
175 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
176 mesh_id_len))) {
177 atomic_inc(&bss->users);
178 break;
179 }
180 bss = bss->hnext;
181 }
182 spin_unlock_bh(&local->sta_bss_lock);
183 return bss;
184}
185
186static struct ieee80211_sta_bss *
187ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
188 u8 *mesh_cfg, int mesh_config_len, int freq)
189{
190 struct ieee80211_sta_bss *bss;
191
192 if (mesh_config_len != MESH_CFG_LEN)
193 return NULL;
194
195 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
196 if (!bss)
197 return NULL;
198
199 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
200 if (!bss->mesh_cfg) {
201 kfree(bss);
202 return NULL;
203 }
204
205 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
206 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
207 if (!bss->mesh_id) {
208 kfree(bss->mesh_cfg);
209 kfree(bss);
210 return NULL;
211 }
212 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
213 }
214
215 atomic_inc(&bss->users);
216 atomic_inc(&bss->users);
217 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
218 bss->mesh_id_len = mesh_id_len;
219 bss->freq = freq;
220 spin_lock_bh(&local->sta_bss_lock);
221 /* TODO: order by RSSI? */
222 list_add_tail(&bss->list, &local->sta_bss_list);
223 __ieee80211_rx_bss_hash_add(local, bss);
224 spin_unlock_bh(&local->sta_bss_lock);
225 return bss;
226}
227#endif
228
229static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
230{
231 kfree(bss->ies);
232 kfree(bss_mesh_id(bss));
233 kfree(bss_mesh_cfg(bss));
234 kfree(bss);
235}
236
3e122be0 237static void ieee80211_rx_bss_put(struct ieee80211_local *local,
60f8b39c
JB		 238 struct ieee80211_sta_bss *bss)
239{
240 local_bh_disable();
241 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
242 local_bh_enable();
243 return;
244 }
245
246 __ieee80211_rx_bss_hash_del(local, bss);
247 list_del(&bss->list);
248 spin_unlock_bh(&local->sta_bss_lock);
249 ieee80211_rx_bss_free(bss);
250}
f0706e82 251
60f8b39c
JB		 252void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
253{
254 spin_lock_init(&local->sta_bss_lock);
255 INIT_LIST_HEAD(&local->sta_bss_list);
256}
257
258void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
259{
260 struct ieee80211_sta_bss *bss, *tmp;
f0706e82 261
60f8b39c
JB		 262 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
263 ieee80211_rx_bss_put(local, bss);
264}
265
266static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
43ac2ca3
JM		 267{
268 u8 *end, *pos;
269
270 pos = bss->ies;
271 if (pos == NULL)
272 return NULL;
273 end = pos + bss->ies_len;
274
275 while (pos + 1 < end) {
276 if (pos + 2 + pos[1] > end)
277 break;
278 if (pos[0] == ie)
279 return pos;
280 pos += 2 + pos[1];
281 }
282
283 return NULL;
284}
285
60f8b39c 286/* utils */
f0706e82
JB		 287static int ecw2cw(int ecw)
288{
ac2bf324 289 return (1 << ecw) - 1;
f0706e82
JB		 290}
291
60f8b39c
JB		 292/* frame sending functions */
293void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
294 int encrypt)
295{
296 skb->dev = sdata->local->mdev;
297 skb_set_mac_header(skb, 0);
298 skb_set_network_header(skb, 0);
299 skb_set_transport_header(skb, 0);
e2839d8f 300
60f8b39c
JB		 301 skb->iif = sdata->dev->ifindex;
302 skb->do_not_encrypt = !encrypt;
303
304 dev_queue_xmit(skb);
305}
306
307static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
308 struct ieee80211_if_sta *ifsta,
309 int transaction, u8 *extra, size_t extra_len,
310 int encrypt)
311{
312 struct ieee80211_local *local = sdata->local;
313 struct sk_buff *skb;
314 struct ieee80211_mgmt *mgmt;
315
316 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
317 sizeof(*mgmt) + 6 + extra_len);
318 if (!skb) {
319 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
320 "frame\n", sdata->dev->name);
321 return;
322 }
323 skb_reserve(skb, local->hw.extra_tx_headroom);
324
325 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
326 memset(mgmt, 0, 24 + 6);
327 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
328 IEEE80211_STYPE_AUTH);
329 if (encrypt)
330 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
331 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
332 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
333 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
334 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
335 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
336 ifsta->auth_transaction = transaction + 1;
337 mgmt->u.auth.status_code = cpu_to_le16(0);
338 if (extra)
339 memcpy(skb_put(skb, extra_len), extra, extra_len);
340
341 ieee80211_sta_tx(sdata, skb, encrypt);
342}
343
344static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
345 u8 *ssid, size_t ssid_len)
346{
347 struct ieee80211_local *local = sdata->local;
348 struct ieee80211_supported_band *sband;
349 struct sk_buff *skb;
350 struct ieee80211_mgmt *mgmt;
351 u8 *pos, *supp_rates, *esupp_rates = NULL;
352 int i;
353
354 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
355 if (!skb) {
356 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
357 "request\n", sdata->dev->name);
358 return;
359 }
360 skb_reserve(skb, local->hw.extra_tx_headroom);
361
362 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
363 memset(mgmt, 0, 24);
364 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
365 IEEE80211_STYPE_PROBE_REQ);
366 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
367 if (dst) {
368 memcpy(mgmt->da, dst, ETH_ALEN);
369 memcpy(mgmt->bssid, dst, ETH_ALEN);
370 } else {
371 memset(mgmt->da, 0xff, ETH_ALEN);
372 memset(mgmt->bssid, 0xff, ETH_ALEN);
373 }
374 pos = skb_put(skb, 2 + ssid_len);
375 *pos++ = WLAN_EID_SSID;
376 *pos++ = ssid_len;
377 memcpy(pos, ssid, ssid_len);
378
379 supp_rates = skb_put(skb, 2);
380 supp_rates[0] = WLAN_EID_SUPP_RATES;
381 supp_rates[1] = 0;
382 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
383
384 for (i = 0; i < sband->n_bitrates; i++) {
385 struct ieee80211_rate *rate = &sband->bitrates[i];
386 if (esupp_rates) {
387 pos = skb_put(skb, 1);
388 esupp_rates[1]++;
389 } else if (supp_rates[1] == 8) {
390 esupp_rates = skb_put(skb, 3);
391 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
392 esupp_rates[1] = 1;
393 pos = &esupp_rates[2];
394 } else {
395 pos = skb_put(skb, 1);
396 supp_rates[1]++;
397 }
398 *pos = rate->bitrate / 5;
399 }
400
401 ieee80211_sta_tx(sdata, skb, 0);
402}
403
404/* MLME */
f698d856 405static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
e2839d8f
VK		 406 struct ieee80211_sta_bss *bss,
407 int ibss)
408{
e2839d8f
VK		 409 struct ieee80211_local *local = sdata->local;
410 int i, have_higher_than_11mbit = 0;
411
412
413 /* cf. IEEE 802.11 9.2.12 */
414 for (i = 0; i < bss->supp_rates_len; i++)
415 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
416 have_higher_than_11mbit = 1;
417
418 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
419 have_higher_than_11mbit)
420 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
421 else
422 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
423
424
425 if (local->ops->conf_tx) {
426 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 427
428 memset(&qparam, 0, sizeof(qparam));
429
430 qparam.aifs = 2;
431
432 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
433 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
434 qparam.cw_min = 31;
435 else
436 qparam.cw_min = 15;
437
438 qparam.cw_max = 1023;
439 qparam.txop = 0;
440
e100bb64
JB		 441 for (i = 0; i < local_to_hw(local)->queues; i++)
442 local->ops->conf_tx(local_to_hw(local), i, &qparam);
e2839d8f
VK		 443 }
444}
445
f698d856 446static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 447 struct ieee80211_if_sta *ifsta,
448 u8 *wmm_param, size_t wmm_param_len)
449{
f0706e82
JB		 450 struct ieee80211_tx_queue_params params;
451 size_t left;
452 int count;
453 u8 *pos;
454
3434fbd3
JB		 455 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
456 return;
457
458 if (!wmm_param)
459 return;
460
f0706e82
JB		 461 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
462 return;
463 count = wmm_param[6] & 0x0f;
464 if (count == ifsta->wmm_last_param_set)
465 return;
466 ifsta->wmm_last_param_set = count;
467
468 pos = wmm_param + 8;
469 left = wmm_param_len - 8;
470
471 memset(&params, 0, sizeof(params));
472
473 if (!local->ops->conf_tx)
474 return;
475
476 local->wmm_acm = 0;
477 for (; left >= 4; left -= 4, pos += 4) {
478 int aci = (pos[0] >> 5) & 0x03;
479 int acm = (pos[0] >> 4) & 0x01;
480 int queue;
481
482 switch (aci) {
483 case 1:
e100bb64 484 queue = 3;
988c0f72 485 if (acm)
f0706e82 486 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 487 break;
488 case 2:
e100bb64 489 queue = 1;
988c0f72 490 if (acm)
f0706e82 491 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 492 break;
493 case 3:
e100bb64 494 queue = 0;
988c0f72 495 if (acm)
f0706e82 496 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 497 break;
498 case 0:
499 default:
e100bb64 500 queue = 2;
988c0f72 501 if (acm)
f0706e82 502 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 503 break;
504 }
505
506 params.aifs = pos[0] & 0x0f;
507 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
508 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 509 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 510#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 511 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 512 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 513 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 514 params.cw_max, params.txop);
515#endif
f0706e82
JB		 516 /* TODO: handle ACM (block TX, fallback to next lowest allowed
517 * AC for now) */
518 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
519 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 520 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 521 }
522 }
523}
524
50c4afb9
JL		 525static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
526 bool use_protection,
527 bool use_short_preamble)
5628221c 528{
471b3efd 529 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 530#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 531 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 532 DECLARE_MAC_BUF(mac);
ebd74487 533#endif
471b3efd 534 u32 changed = 0;
5628221c 535
471b3efd 536 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 537#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 538 if (net_ratelimit()) {
539 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 540 "%s)\n",
471b3efd 541 sdata->dev->name,
5628221c 542 use_protection ? "enabled" : "disabled",
0795af57 543 print_mac(mac, ifsta->bssid));
5628221c 544 }
f4ea83dd 545#endif
471b3efd
JB		 546 bss_conf->use_cts_prot = use_protection;
547 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 548 }
7e9ed188 549
d43c7b37 550 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 551#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 552 if (net_ratelimit()) {
553 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 554 " (BSSID=%s)\n",
471b3efd 555 sdata->dev->name,
d43c7b37 556 use_short_preamble ? "short" : "long",
0795af57 557 print_mac(mac, ifsta->bssid));
7e9ed188 558 }
f4ea83dd 559#endif
d43c7b37 560 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 561 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 562 }
d9430a32 563
471b3efd 564 return changed;
5628221c
DD		 565}
566
50c4afb9
JL		 567static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
568 u8 erp_value)
569{
570 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
571 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
572
573 return ieee80211_handle_protect_preamb(sdata,
574 use_protection, use_short_preamble);
575}
576
577static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
578 struct ieee80211_sta_bss *bss)
579{
580 u32 changed = 0;
581
582 if (bss->has_erp_value)
583 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
584 else {
585 u16 capab = bss->capability;
586 changed |= ieee80211_handle_protect_preamb(sdata, false,
587 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
588 }
589
590 return changed;
591}
592
c7153508
RR		 593int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
594 struct ieee80211_ht_info *ht_info)
595{
596
597 if (ht_info == NULL)
598 return -EINVAL;
599
600 memset(ht_info, 0, sizeof(*ht_info));
601
602 if (ht_cap_ie) {
603 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
604
605 ht_info->ht_supported = 1;
606 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
607 ht_info->ampdu_factor =
608 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
609 ht_info->ampdu_density =
610 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
611 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
612 } else
613 ht_info->ht_supported = 0;
614
615 return 0;
616}
617
618int ieee80211_ht_addt_info_ie_to_ht_bss_info(
619 struct ieee80211_ht_addt_info *ht_add_info_ie,
620 struct ieee80211_ht_bss_info *bss_info)
621{
622 if (bss_info == NULL)
623 return -EINVAL;
624
625 memset(bss_info, 0, sizeof(*bss_info));
626
627 if (ht_add_info_ie) {
628 u16 op_mode;
629 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
630
631 bss_info->primary_channel = ht_add_info_ie->control_chan;
632 bss_info->bss_cap = ht_add_info_ie->ht_param;
633 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
634 }
635
636 return 0;
637}
5628221c 638
f5e5bf25
TW		 639static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
640 struct ieee80211_if_sta *ifsta)
641{
642 union iwreq_data wrqu;
643 memset(&wrqu, 0, sizeof(wrqu));
644 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
645 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
646 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
647 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
648}
649
f698d856 650static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 651 struct ieee80211_if_sta *ifsta)
652{
f0706e82
JB		 653 union iwreq_data wrqu;
654
f0706e82 655 if (ifsta->assocreq_ies) {
087d833e
JM		 656 memset(&wrqu, 0, sizeof(wrqu));
657 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 658 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 659 ifsta->assocreq_ies);
f0706e82 660 }
087d833e
JM		 661 if (ifsta->assocresp_ies) {
662 memset(&wrqu, 0, sizeof(wrqu));
663 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 664 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 665 ifsta->assocresp_ies);
f0706e82 666 }
f0706e82
JB		 667}
668
669
f698d856 670static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 671 struct ieee80211_if_sta *ifsta)
f0706e82 672{
471b3efd 673 struct ieee80211_local *local = sdata->local;
38668c05 674 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 675 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 676
f5e5bf25 677 struct ieee80211_sta_bss *bss;
d6f2da5b 678
f5e5bf25 679 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 680
f5e5bf25
TW		 681 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
682 return;
21c0cbe7 683
f5e5bf25
TW		 684 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
685 conf->channel->center_freq,
686 ifsta->ssid, ifsta->ssid_len);
687 if (bss) {
688 /* set timing information */
689 sdata->bss_conf.beacon_int = bss->beacon_int;
690 sdata->bss_conf.timestamp = bss->timestamp;
691 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 692
f5e5bf25 693 changed |= ieee80211_handle_bss_capability(sdata, bss);
5628221c 694
f5e5bf25
TW		 695 ieee80211_rx_bss_put(local, bss);
696 }
38668c05 697
f5e5bf25
TW		 698 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
699 changed |= BSS_CHANGED_HT;
700 sdata->bss_conf.assoc_ht = 1;
701 sdata->bss_conf.ht_conf = &conf->ht_conf;
702 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
703 }
38668c05 704
f5e5bf25
TW		 705 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
706 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
707 ieee80211_sta_send_associnfo(sdata, ifsta);
38668c05 708
f0706e82 709 ifsta->last_probe = jiffies;
f5e5bf25 710 ieee80211_led_assoc(local, 1);
471b3efd 711
f5e5bf25 712 sdata->bss_conf.assoc = 1;
471b3efd 713 ieee80211_bss_info_change_notify(sdata, changed);
8db9369f 714
24e64622 715 netif_tx_start_all_queues(sdata->dev);
f5e5bf25 716 netif_carrier_on(sdata->dev);
8db9369f 717
f5e5bf25 718 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 719}
720
9859b81e
RR		 721static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
722 struct ieee80211_if_sta *ifsta)
723{
724 DECLARE_MAC_BUF(mac);
725
726 ifsta->direct_probe_tries++;
727 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
728 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
729 sdata->dev->name, print_mac(mac, ifsta->bssid));
730 ifsta->state = IEEE80211_STA_MLME_DISABLED;
731 return;
732 }
733
734 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
735 sdata->dev->name, print_mac(mac, ifsta->bssid),
736 ifsta->direct_probe_tries);
737
738 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
739
740 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
741
742 /* Direct probe is sent to broadcast address as some APs
743 * will not answer to direct packet in unassociated state.
744 */
745 ieee80211_send_probe_req(sdata, NULL,
746 ifsta->ssid, ifsta->ssid_len);
747
748 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
749}
750
f0706e82 751
f698d856 752static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 753 struct ieee80211_if_sta *ifsta)
754{
0795af57
JP		 755 DECLARE_MAC_BUF(mac);
756
f0706e82
JB		 757 ifsta->auth_tries++;
758 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 759 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 760 " timed out\n",
f698d856 761 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 762 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 763 return;
764 }
765
48c2fc59 766 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0795af57 767 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
f698d856 768 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 769
f698d856 770 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
f0706e82
JB		 771
772 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
773}
774
36d16ae7
HS		 775static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
776 struct ieee80211_supported_band *sband,
777 u64 *rates)
778{
779 int i, j, count;
780 *rates = 0;
781 count = 0;
782 for (i = 0; i < bss->supp_rates_len; i++) {
783 int rate = (bss->supp_rates[i] & 0x7F) * 5;
784
785 for (j = 0; j < sband->n_bitrates; j++)
786 if (sband->bitrates[j].bitrate == rate) {
787 *rates |= BIT(j);
788 count++;
789 break;
790 }
791 }
792
793 return count;
794}
f0706e82 795
f698d856 796static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 797 struct ieee80211_if_sta *ifsta)
798{
f698d856 799 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 800 struct sk_buff *skb;
801 struct ieee80211_mgmt *mgmt;
43ac2ca3 802 u8 *pos, *ies, *ht_add_ie;
36d16ae7 803 int i, len, count, rates_len, supp_rates_len;
f0706e82
JB		 804 u16 capab;
805 struct ieee80211_sta_bss *bss;
806 int wmm = 0;
8318d78a 807 struct ieee80211_supported_band *sband;
36d16ae7 808 u64 rates = 0;
f0706e82
JB		 809
810 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
811 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
812 ifsta->ssid_len);
813 if (!skb) {
814 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
f698d856 815 "frame\n", sdata->dev->name);
f0706e82
JB		 816 return;
817 }
818 skb_reserve(skb, local->hw.extra_tx_headroom);
819
8318d78a
JB		 820 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
821
f0706e82 822 capab = ifsta->capab;
8318d78a
JB		 823
824 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
825 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
826 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
827 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
828 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 829 }
8318d78a 830
f698d856 831 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 832 local->hw.conf.channel->center_freq,
cffdd30d 833 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 834 if (bss) {
835 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
836 capab |= WLAN_CAPABILITY_PRIVACY;
43ac2ca3 837 if (bss->wmm_used)
f0706e82 838 wmm = 1;
0d580a77
HS		 839
840 /* get all rates supported by the device and the AP as
841 * some APs don't like getting a superset of their rates
842 * in the association request (e.g. D-Link DAP 1353 in
843 * b-only mode) */
844 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
845
06ff47bc
TW		 846 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
847 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
848 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
849
3e122be0 850 ieee80211_rx_bss_put(local, bss);
0d580a77
HS		 851 } else {
852 rates = ~0;
853 rates_len = sband->n_bitrates;
f0706e82
JB		 854 }
855
856 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
857 memset(mgmt, 0, 24);
858 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 859 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 860 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
861
d6f2da5b 862 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82 863 skb_put(skb, 10);
e7827a70
HH		 864 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
865 IEEE80211_STYPE_REASSOC_REQ);
f0706e82 866 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 867 mgmt->u.reassoc_req.listen_interval =
868 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 869 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
870 ETH_ALEN);
871 } else {
872 skb_put(skb, 4);
e7827a70
HH		 873 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
874 IEEE80211_STYPE_ASSOC_REQ);
f0706e82 875 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 876 mgmt->u.reassoc_req.listen_interval =
877 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 878 }
879
880 /* SSID */
881 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
882 *pos++ = WLAN_EID_SSID;
883 *pos++ = ifsta->ssid_len;
884 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
885
0d580a77 886 /* add all rates which were marked to be used above */
36d16ae7
HS		 887 supp_rates_len = rates_len;
888 if (supp_rates_len > 8)
889 supp_rates_len = 8;
890
8318d78a 891 len = sband->n_bitrates;
36d16ae7 892 pos = skb_put(skb, supp_rates_len + 2);
f0706e82 893 *pos++ = WLAN_EID_SUPP_RATES;
36d16ae7 894 *pos++ = supp_rates_len;
f0706e82 895
36d16ae7
HS		 896 count = 0;
897 for (i = 0; i < sband->n_bitrates; i++) {
898 if (BIT(i) & rates) {
8318d78a 899 int rate = sband->bitrates[i].bitrate;
f0706e82 900 *pos++ = (u8) (rate / 5);
36d16ae7
HS		 901 if (++count == 8)
902 break;
903 }
904 }
905
8ab65b03 906 if (rates_len > count) {
36d16ae7
HS		 907 pos = skb_put(skb, rates_len - count + 2);
908 *pos++ = WLAN_EID_EXT_SUPP_RATES;
909 *pos++ = rates_len - count;
910
911 for (i++; i < sband->n_bitrates; i++) {
912 if (BIT(i) & rates) {
913 int rate = sband->bitrates[i].bitrate;
914 *pos++ = (u8) (rate / 5);
915 }
f0706e82
JB		 916 }
917 }
918
06ff47bc
TW		 919 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
920 /* 1. power capabilities */
921 pos = skb_put(skb, 4);
922 *pos++ = WLAN_EID_PWR_CAPABILITY;
923 *pos++ = 2;
924 *pos++ = 0; /* min tx power */
925 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
926
927 /* 2. supported channels */
928 /* TODO: get this in reg domain format */
929 pos = skb_put(skb, 2 * sband->n_channels + 2);
930 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
931 *pos++ = 2 * sband->n_channels;
932 for (i = 0; i < sband->n_channels; i++) {
933 *pos++ = ieee80211_frequency_to_channel(
934 sband->channels[i].center_freq);
935 *pos++ = 1; /* one channel in the subband*/
936 }
937 }
938
f0706e82
JB		 939 if (ifsta->extra_ie) {
940 pos = skb_put(skb, ifsta->extra_ie_len);
941 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
942 }
943
d6f2da5b 944 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 945 pos = skb_put(skb, 9);
946 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
947 *pos++ = 7; /* len */
948 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
949 *pos++ = 0x50;
950 *pos++ = 0xf2;
951 *pos++ = 2; /* WME */
952 *pos++ = 0; /* WME info */
953 *pos++ = 1; /* WME ver */
954 *pos++ = 0;
955 }
3434fbd3 956
c7153508 957 /* wmm support is a must to HT */
3434fbd3 958 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
43ac2ca3
JM		 959 sband->ht_info.ht_supported &&
960 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
9306102e 961 struct ieee80211_ht_addt_info *ht_add_info =
43ac2ca3 962 (struct ieee80211_ht_addt_info *)ht_add_ie;
9306102e
EG		 963 u16 cap = sband->ht_info.cap;
964 __le16 tmp;
965 u32 flags = local->hw.conf.channel->flags;
966
967 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
968 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
969 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
970 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
971 cap &= ~IEEE80211_HT_CAP_SGI_40;
972 }
973 break;
974 case IEEE80211_HT_IE_CHA_SEC_BELOW:
975 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
976 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
977 cap &= ~IEEE80211_HT_CAP_SGI_40;
978 }
979 break;
980 }
981
982 tmp = cpu_to_le16(cap);
c7153508
RR		 983 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
984 *pos++ = WLAN_EID_HT_CAPABILITY;
985 *pos++ = sizeof(struct ieee80211_ht_cap);
986 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
987 memcpy(pos, &tmp, sizeof(u16));
988 pos += sizeof(u16);
8318d78a
JB		 989 /* TODO: needs a define here for << 2 */
990 *pos++ = sband->ht_info.ampdu_factor |
991 (sband->ht_info.ampdu_density << 2);
992 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 993 }
f0706e82
JB		 994
995 kfree(ifsta->assocreq_ies);
996 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 997 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 998 if (ifsta->assocreq_ies)
999 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
1000
f698d856 1001 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 1002}
1003
1004
f698d856 1005static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1006 struct ieee80211_if_sta *ifsta, u16 reason)
1007{
f698d856 1008 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1009 struct sk_buff *skb;
1010 struct ieee80211_mgmt *mgmt;
1011
1012 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
1013 if (!skb) {
1014 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
f698d856 1015 "frame\n", sdata->dev->name);
f0706e82
JB		 1016 return;
1017 }
1018 skb_reserve(skb, local->hw.extra_tx_headroom);
1019
1020 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1021 memset(mgmt, 0, 24);
1022 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 1023 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 1024 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1025 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1026 IEEE80211_STYPE_DEAUTH);
f0706e82
JB		 1027 skb_put(skb, 2);
1028 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1029
f698d856 1030 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 1031}
1032
60f8b39c
JB		 1033static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1034{
1035 if (!sdata || !sdata->default_key ||
1036 sdata->default_key->conf.alg != ALG_WEP)
1037 return 0;
1038 return 1;
1039}
f0706e82 1040
f698d856 1041static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1042 struct ieee80211_if_sta *ifsta, u16 reason)
1043{
f698d856 1044 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1045 struct sk_buff *skb;
1046 struct ieee80211_mgmt *mgmt;
1047
1048 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
1049 if (!skb) {
1050 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
f698d856 1051 "frame\n", sdata->dev->name);
f0706e82
JB		 1052 return;
1053 }
1054 skb_reserve(skb, local->hw.extra_tx_headroom);
1055
1056 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1057 memset(mgmt, 0, 24);
1058 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 1059 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 1060 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1061 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1062 IEEE80211_STYPE_DISASSOC);
f0706e82
JB		 1063 skb_put(skb, 2);
1064 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
1065
f698d856 1066 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 1067}
1068
aa458d17
TW		 1069static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1070 struct ieee80211_if_sta *ifsta, bool deauth,
1071 bool self_disconnected, u16 reason)
1072{
1073 struct ieee80211_local *local = sdata->local;
1074 struct sta_info *sta;
f5e5bf25 1075 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 1076
1077 rcu_read_lock();
1078
1079 sta = sta_info_get(local, ifsta->bssid);
1080 if (!sta) {
1081 rcu_read_unlock();
1082 return;
1083 }
1084
1085 if (deauth) {
1086 ifsta->direct_probe_tries = 0;
1087 ifsta->auth_tries = 0;
1088 }
1089 ifsta->assoc_scan_tries = 0;
1090 ifsta->assoc_tries = 0;
1091
24e64622 1092 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1093 netif_carrier_off(sdata->dev);
1094
1095 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
1096
1097 if (self_disconnected) {
1098 if (deauth)
1099 ieee80211_send_deauth(sdata, ifsta, reason);
1100 else
1101 ieee80211_send_disassoc(sdata, ifsta, reason);
1102 }
1103
f5e5bf25
TW		 1104 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1105 changed |= ieee80211_reset_erp_info(sdata);
1106
1107 if (sdata->bss_conf.assoc_ht)
1108 changed |= BSS_CHANGED_HT;
1109
1110 sdata->bss_conf.assoc_ht = 0;
1111 sdata->bss_conf.ht_conf = NULL;
1112 sdata->bss_conf.ht_bss_conf = NULL;
1113
1114 ieee80211_led_assoc(local, 0);
1115 sdata->bss_conf.assoc = 0;
1116
1117 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 1118
1119 if (self_disconnected)
1120 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1121
1122 sta_info_unlink(&sta);
1123
1124 rcu_read_unlock();
1125
1126 sta_info_destroy(sta);
1127}
f0706e82 1128
f698d856 1129static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1130 struct ieee80211_if_sta *ifsta)
1131{
f698d856 1132 struct ieee80211_local *local = sdata->local;
f0706e82 1133 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 1134 int bss_privacy;
1135 int wep_privacy;
1136 int privacy_invoked;
f0706e82 1137
5b98b1f7 1138 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 1139 return 0;
1140
f698d856 1141 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 1142 local->hw.conf.channel->center_freq,
cffdd30d 1143 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1144 if (!bss)
1145 return 0;
1146
5b98b1f7 1147 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1148 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1149 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1150
3e122be0 1151 ieee80211_rx_bss_put(local, bss);
f0706e82 1152
5b98b1f7
JB		 1153 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1154 return 0;
1155
1156 return 1;
f0706e82
JB		 1157}
1158
f698d856 1159static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1160 struct ieee80211_if_sta *ifsta)
1161{
0795af57
JP		 1162 DECLARE_MAC_BUF(mac);
1163
f0706e82
JB		 1164 ifsta->assoc_tries++;
1165 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 1166 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 1167 " timed out\n",
f698d856 1168 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 1169 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1170 return;
1171 }
1172
48c2fc59 1173 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 1174 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 1175 sdata->dev->name, print_mac(mac, ifsta->bssid));
1176 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1177 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1178 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1179 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1180 return;
1181 }
1182
f698d856 1183 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1184
1185 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1186}
1187
1188
f698d856 1189static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1190 struct ieee80211_if_sta *ifsta)
1191{
f698d856 1192 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1193 struct sta_info *sta;
1194 int disassoc;
0795af57 1195 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1196
1197 /* TODO: start monitoring current AP signal quality and number of
1198 * missed beacons. Scan other channels every now and then and search
1199 * for better APs. */
1200 /* TODO: remove expired BSSes */
1201
48c2fc59 1202 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1203
d0709a65
JB		 1204 rcu_read_lock();
1205
f0706e82
JB		 1206 sta = sta_info_get(local, ifsta->bssid);
1207 if (!sta) {
0795af57 1208 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 1209 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 1210 disassoc = 1;
1211 } else {
1212 disassoc = 0;
1213 if (time_after(jiffies,
1214 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1215 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1216 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 1217 "current AP %s - assume out of "
f0706e82 1218 "range\n",
f698d856 1219 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 1220 disassoc = 1;
d6f2da5b 1221 } else
f698d856 1222 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1223 local->scan_ssid,
1224 local->scan_ssid_len);
d6f2da5b 1225 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1226 } else {
d6f2da5b 1227 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1228 if (time_after(jiffies, ifsta->last_probe +
1229 IEEE80211_PROBE_INTERVAL)) {
1230 ifsta->last_probe = jiffies;
f698d856 1231 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1232 ifsta->ssid,
1233 ifsta->ssid_len);
1234 }
1235 }
f0706e82 1236 }
d0709a65
JB		 1237
1238 rcu_read_unlock();
1239
60f8b39c
JB		 1240 if (disassoc)
1241 ieee80211_set_disassoc(sdata, ifsta, true, true,
1242 WLAN_REASON_PREV_AUTH_NOT_VALID);
1243 else
1244 mod_timer(&ifsta->timer, jiffies +
1245 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1246}
1247
1248
f698d856 1249static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1250 struct ieee80211_if_sta *ifsta)
1251{
f698d856 1252 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1253 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1254 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1255}
1256
1257
f698d856 1258static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1259 struct ieee80211_if_sta *ifsta,
1260 struct ieee80211_mgmt *mgmt,
1261 size_t len)
1262{
1263 u8 *pos;
1264 struct ieee802_11_elems elems;
1265
f0706e82 1266 pos = mgmt->u.auth.variable;
67a4cce4 1267 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1268 if (!elems.challenge)
f0706e82 1269 return;
f698d856 1270 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1271 elems.challenge_len + 2, 1);
1272}
1273
f698d856 1274static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
9f985b0e
RR		 1275 u8 dialog_token, u16 status, u16 policy,
1276 u16 buf_size, u16 timeout)
1277{
9f985b0e 1278 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 1279 struct ieee80211_local *local = sdata->local;
9f985b0e
RR		 1280 struct sk_buff *skb;
1281 struct ieee80211_mgmt *mgmt;
1282 u16 capab;
1283
3acea5b6
EK		 1284 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1285
9f985b0e
RR		 1286 if (!skb) {
1287 printk(KERN_DEBUG "%s: failed to allocate buffer "
f698d856 1288 "for addba resp frame\n", sdata->dev->name);
9f985b0e
RR		 1289 return;
1290 }
1291
1292 skb_reserve(skb, local->hw.extra_tx_headroom);
1293 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1294 memset(mgmt, 0, 24);
1295 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1296 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1297 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1298 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
9f985b0e
RR		 1299 else
1300 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1302 IEEE80211_STYPE_ACTION);
9f985b0e
RR		 1303
1304 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1305 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1306 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1307 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1308
1309 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1310 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1311 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1312
1313 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1314 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1315 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1316
f698d856 1317 ieee80211_sta_tx(sdata, skb, 0);
9f985b0e
RR		 1318
1319 return;
1320}
1321
f698d856 1322void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
eadc8d9e
RR		 1323 u16 tid, u8 dialog_token, u16 start_seq_num,
1324 u16 agg_size, u16 timeout)
1325{
f698d856 1326 struct ieee80211_local *local = sdata->local;
eadc8d9e
RR		 1327 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1328 struct sk_buff *skb;
1329 struct ieee80211_mgmt *mgmt;
1330 u16 capab;
1331
3acea5b6 1332 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
eadc8d9e
RR		 1333
1334 if (!skb) {
1335 printk(KERN_ERR "%s: failed to allocate buffer "
f698d856 1336 "for addba request frame\n", sdata->dev->name);
eadc8d9e
RR		 1337 return;
1338 }
1339 skb_reserve(skb, local->hw.extra_tx_headroom);
1340 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1341 memset(mgmt, 0, 24);
1342 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1343 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
eadc8d9e 1344 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1345 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
eadc8d9e
RR		 1346 else
1347 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1348
e7827a70
HH		 1349 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1350 IEEE80211_STYPE_ACTION);
eadc8d9e
RR		 1351
1352 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1353
1354 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1355 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1356
1357 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1358 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1359 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1360 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1361
1362 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1363
1364 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1365 mgmt->u.action.u.addba_req.start_seq_num =
1366 cpu_to_le16(start_seq_num << 4);
1367
f698d856 1368 ieee80211_sta_tx(sdata, skb, 0);
eadc8d9e
RR		 1369}
1370
60f8b39c
JB		 1371/*
1372 * After accepting the AddBA Request we activated a timer,
1373 * resetting it after each frame that arrives from the originator.
1374 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1375 */
1376static void sta_rx_agg_session_timer_expired(unsigned long data)
1377{
1378 /* not an elegant detour, but there is no choice as the timer passes
1379 * only one argument, and various sta_info are needed here, so init
1380 * flow in sta_info_create gives the TID as data, while the timer_to_id
1381 * array gives the sta through container_of */
1382 u8 *ptid = (u8 *)data;
1383 u8 *timer_to_id = ptid - *ptid;
1384 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1385 timer_to_tid[0]);
1386
1387#ifdef CONFIG_MAC80211_HT_DEBUG
1388 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1389#endif
1390 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1391 (u16)*ptid, WLAN_BACK_TIMER,
1392 WLAN_REASON_QSTA_TIMEOUT);
1393}
1394
f698d856 1395static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
9f985b0e
RR		 1396 struct ieee80211_mgmt *mgmt,
1397 size_t len)
1398{
07db2183
RR		 1399 struct ieee80211_hw *hw = &local->hw;
1400 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1401 struct sta_info *sta;
07db2183
RR		 1402 struct tid_ampdu_rx *tid_agg_rx;
1403 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1404 u8 dialog_token;
07db2183
RR		 1405 int ret = -EOPNOTSUPP;
1406 DECLARE_MAC_BUF(mac);
9f985b0e 1407
d0709a65
JB		 1408 rcu_read_lock();
1409
9f985b0e 1410 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1411 if (!sta) {
1412 rcu_read_unlock();
9f985b0e 1413 return;
d0709a65 1414 }
9f985b0e
RR		 1415
1416 /* extract session parameters from addba request frame */
1417 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1418 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1419 start_seq_num =
1420 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1421
1422 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1423 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1424 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1425 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1426
9f985b0e
RR		 1427 status = WLAN_STATUS_REQUEST_DECLINED;
1428
07db2183
RR		 1429 /* sanity check for incoming parameters:
1430 * check if configuration can support the BA policy
1431 * and if buffer size does not exceeds max value */
1432 if (((ba_policy != 1)
1433 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1434 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1435 status = WLAN_STATUS_INVALID_QOS_PARAM;
1436#ifdef CONFIG_MAC80211_HT_DEBUG
1437 if (net_ratelimit())
7b9d44cd 1438 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1439 "%s on tid %u. policy %d, buffer size %d\n",
1440 print_mac(mac, mgmt->sa), tid, ba_policy,
1441 buf_size);
1442#endif /* CONFIG_MAC80211_HT_DEBUG */
1443 goto end_no_lock;
1444 }
1445 /* determine default buffer size */
1446 if (buf_size == 0) {
8318d78a
JB		 1447 struct ieee80211_supported_band *sband;
1448
1449 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1450 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1451 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1452 }
1453
07db2183
RR		 1454
1455 /* examine state machine */
07346f81 1456 spin_lock_bh(&sta->lock);
07db2183 1457
cee24a3e 1458 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1459#ifdef CONFIG_MAC80211_HT_DEBUG
1460 if (net_ratelimit())
7b9d44cd 1461 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1462 "%s on tid %u\n",
1463 print_mac(mac, mgmt->sa), tid);
1464#endif /* CONFIG_MAC80211_HT_DEBUG */
1465 goto end;
1466 }
1467
cee24a3e
RR		 1468 /* prepare A-MPDU MLME for Rx aggregation */
1469 sta->ampdu_mlme.tid_rx[tid] =
1470 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1471 if (!sta->ampdu_mlme.tid_rx[tid]) {
f4ea83dd 1472#ifdef CONFIG_MAC80211_HT_DEBUG
cee24a3e
RR		 1473 if (net_ratelimit())
1474 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1475 tid);
f4ea83dd 1476#endif
cee24a3e
RR		 1477 goto end;
1478 }
1479 /* rx timer */
1480 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1481 sta_rx_agg_session_timer_expired;
1482 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1483 (unsigned long)&sta->timer_to_tid[tid];
1484 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1485
1486 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1487
07db2183
RR		 1488 /* prepare reordering buffer */
1489 tid_agg_rx->reorder_buf =
c97c23e3 1490 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
03147dfc 1491 if (!tid_agg_rx->reorder_buf) {
f4ea83dd 1492#ifdef CONFIG_MAC80211_HT_DEBUG
03147dfc
JB		 1493 if (net_ratelimit())
1494 printk(KERN_ERR "can not allocate reordering buffer "
1495 "to tid %d\n", tid);
f4ea83dd 1496#endif
cee24a3e 1497 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1498 goto end;
1499 }
1500 memset(tid_agg_rx->reorder_buf, 0,
c97c23e3 1501 buf_size * sizeof(struct sk_buff *));
07db2183
RR		 1502
1503 if (local->ops->ampdu_action)
1504 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1505 sta->addr, tid, &start_seq_num);
07db2183 1506#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1507 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1508#endif /* CONFIG_MAC80211_HT_DEBUG */
1509
1510 if (ret) {
1511 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1512 kfree(tid_agg_rx);
1513 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1514 goto end;
1515 }
1516
1517 /* change state and send addba resp */
cee24a3e 1518 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1519 tid_agg_rx->dialog_token = dialog_token;
1520 tid_agg_rx->ssn = start_seq_num;
1521 tid_agg_rx->head_seq_num = start_seq_num;
1522 tid_agg_rx->buf_size = buf_size;
1523 tid_agg_rx->timeout = timeout;
1524 tid_agg_rx->stored_mpdu_num = 0;
1525 status = WLAN_STATUS_SUCCESS;
1526end:
07346f81 1527 spin_unlock_bh(&sta->lock);
07db2183
RR		 1528
1529end_no_lock:
f698d856 1530 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
d0709a65
JB		 1531 dialog_token, status, 1, buf_size, timeout);
1532 rcu_read_unlock();
9f985b0e 1533}
f0706e82 1534
f698d856 1535static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
eadc8d9e
RR		 1536 struct ieee80211_mgmt *mgmt,
1537 size_t len)
1538{
eadc8d9e
RR		 1539 struct ieee80211_hw *hw = &local->hw;
1540 struct sta_info *sta;
1541 u16 capab;
1542 u16 tid;
1543 u8 *state;
1544
d0709a65
JB		 1545 rcu_read_lock();
1546
eadc8d9e 1547 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1548 if (!sta) {
1549 rcu_read_unlock();
eadc8d9e 1550 return;
d0709a65 1551 }
eadc8d9e
RR		 1552
1553 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1554 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1555
cee24a3e 1556 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1557
07346f81 1558 spin_lock_bh(&sta->lock);
eadc8d9e 1559
cee24a3e 1560 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1561 spin_unlock_bh(&sta->lock);
cee24a3e
RR		 1562 goto addba_resp_exit;
1563 }
1564
eadc8d9e 1565 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1566 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
07346f81 1567 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1568#ifdef CONFIG_MAC80211_HT_DEBUG
1569 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1570#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1571 goto addba_resp_exit;
eadc8d9e
RR		 1572 }
1573
cee24a3e 1574 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1575#ifdef CONFIG_MAC80211_HT_DEBUG
1576 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1577#endif /* CONFIG_MAC80211_HT_DEBUG */
1578 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1579 == WLAN_STATUS_SUCCESS) {
eadc8d9e 1580 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1581 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e 1582
f4ea83dd 1583 if (*state == HT_AGG_STATE_OPERATIONAL)
eadc8d9e 1584 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
eadc8d9e 1585
07346f81 1586 spin_unlock_bh(&sta->lock);
eadc8d9e 1587 } else {
cee24a3e 1588 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1589 /* this will allow the state check in stop_BA_session */
1590 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1591 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1592 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1593 WLAN_BACK_INITIATOR);
1594 }
cee24a3e
RR		 1595
1596addba_resp_exit:
d0709a65 1597 rcu_read_unlock();
eadc8d9e
RR		 1598}
1599
f698d856 1600void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
eadc8d9e 1601 u16 initiator, u16 reason_code)
07db2183 1602{
f698d856 1603 struct ieee80211_local *local = sdata->local;
07db2183
RR		 1604 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1605 struct sk_buff *skb;
1606 struct ieee80211_mgmt *mgmt;
1607 u16 params;
1608
3acea5b6 1609 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
07db2183
RR		 1610
1611 if (!skb) {
1612 printk(KERN_ERR "%s: failed to allocate buffer "
f698d856 1613 "for delba frame\n", sdata->dev->name);
07db2183
RR		 1614 return;
1615 }
1616
1617 skb_reserve(skb, local->hw.extra_tx_headroom);
1618 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1619 memset(mgmt, 0, 24);
1620 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1621 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1622 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1623 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
07db2183
RR		 1624 else
1625 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1626 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1627 IEEE80211_STYPE_ACTION);
07db2183
RR		 1628
1629 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1630
1631 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1632 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1633 params = (u16)(initiator << 11); /* bit 11 initiator */
1634 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1635
1636 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1637 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1638
f698d856 1639 ieee80211_sta_tx(sdata, skb, 0);
07db2183
RR		 1640}
1641
f698d856 1642void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
429a3805 1643{
f698d856 1644 struct ieee80211_local *local = sdata->local;
429a3805
RR		 1645 struct sk_buff *skb;
1646 struct ieee80211_bar *bar;
1647 u16 bar_control = 0;
1648
1649 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1650 if (!skb) {
1651 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1652 "bar frame\n", sdata->dev->name);
429a3805
RR		 1653 return;
1654 }
1655 skb_reserve(skb, local->hw.extra_tx_headroom);
1656 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1657 memset(bar, 0, sizeof(*bar));
e7827a70
HH		 1658 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1659 IEEE80211_STYPE_BACK_REQ);
429a3805 1660 memcpy(bar->ra, ra, ETH_ALEN);
f698d856 1661 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
429a3805
RR		 1662 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1663 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1664 bar_control |= (u16)(tid << 12);
1665 bar->control = cpu_to_le16(bar_control);
1666 bar->start_seq_num = cpu_to_le16(ssn);
1667
f698d856 1668 ieee80211_sta_tx(sdata, skb, 0);
429a3805
RR		 1669}
1670
f698d856 1671void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
07db2183
RR		 1672 u16 initiator, u16 reason)
1673{
f698d856 1674 struct ieee80211_local *local = sdata->local;
07db2183
RR		 1675 struct ieee80211_hw *hw = &local->hw;
1676 struct sta_info *sta;
b580781e 1677 int ret, i;
513a1025 1678 DECLARE_MAC_BUF(mac);
07db2183 1679
d0709a65
JB		 1680 rcu_read_lock();
1681
07db2183 1682 sta = sta_info_get(local, ra);
d0709a65
JB		 1683 if (!sta) {
1684 rcu_read_unlock();
07db2183 1685 return;
d0709a65 1686 }
07db2183
RR		 1687
1688 /* check if TID is in operational state */
07346f81 1689 spin_lock_bh(&sta->lock);
cee24a3e 1690 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183 1691 != HT_AGG_STATE_OPERATIONAL) {
07346f81 1692 spin_unlock_bh(&sta->lock);
d0709a65 1693 rcu_read_unlock();
07db2183
RR		 1694 return;
1695 }
cee24a3e 1696 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1697 HT_AGG_STATE_REQ_STOP_BA_MSK |
1698 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
07346f81 1699 spin_unlock_bh(&sta->lock);
07db2183
RR		 1700
1701 /* stop HW Rx aggregation. ampdu_action existence
1702 * already verified in session init so we add the BUG_ON */
1703 BUG_ON(!local->ops->ampdu_action);
1704
513a1025
RR		 1705#ifdef CONFIG_MAC80211_HT_DEBUG
1706 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1707 print_mac(mac, ra), tid);
1708#endif /* CONFIG_MAC80211_HT_DEBUG */
1709
07db2183 1710 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1711 ra, tid, NULL);
07db2183
RR		 1712 if (ret)
1713 printk(KERN_DEBUG "HW problem - can not stop rx "
f4ea83dd 1714 "aggregation for tid %d\n", tid);
07db2183
RR		 1715
1716 /* shutdown timer has not expired */
1717 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1718 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1719
1720 /* check if this is a self generated aggregation halt */
1721 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
f698d856 1722 ieee80211_send_delba(sdata, ra, tid, 0, reason);
07db2183
RR		 1723
1724 /* free the reordering buffer */
cee24a3e
RR		 1725 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1726 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1727 /* release the reordered frames */
cee24a3e
RR		 1728 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1729 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1730 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1731 }
1732 }
cee24a3e
RR		 1733 /* free resources */
1734 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1735 kfree(sta->ampdu_mlme.tid_rx[tid]);
1736 sta->ampdu_mlme.tid_rx[tid] = NULL;
1737 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1738
d0709a65 1739 rcu_read_unlock();
07db2183
RR		 1740}
1741
eadc8d9e 1742
f698d856 1743static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
688b88a4
RR		 1744 struct ieee80211_mgmt *mgmt, size_t len)
1745{
f698d856 1746 struct ieee80211_local *local = sdata->local;
688b88a4
RR		 1747 struct sta_info *sta;
1748 u16 tid, params;
1749 u16 initiator;
1750 DECLARE_MAC_BUF(mac);
1751
d0709a65
JB		 1752 rcu_read_lock();
1753
688b88a4 1754 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1755 if (!sta) {
1756 rcu_read_unlock();
688b88a4 1757 return;
d0709a65 1758 }
688b88a4
RR		 1759
1760 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1761 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1762 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1763
1764#ifdef CONFIG_MAC80211_HT_DEBUG
1765 if (net_ratelimit())
d92684e6
RR		 1766 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1767 print_mac(mac, mgmt->sa),
2e354ed7 1768 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1769 mgmt->u.action.u.delba.reason_code);
1770#endif /* CONFIG_MAC80211_HT_DEBUG */
1771
1772 if (initiator == WLAN_BACK_INITIATOR)
f698d856 1773 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
688b88a4 1774 WLAN_BACK_INITIATOR, 0);
d92684e6 1775 else { /* WLAN_BACK_RECIPIENT */
07346f81 1776 spin_lock_bh(&sta->lock);
cee24a3e 1777 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6 1778 HT_AGG_STATE_OPERATIONAL;
07346f81 1779 spin_unlock_bh(&sta->lock);
d92684e6
RR		 1780 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1781 WLAN_BACK_RECIPIENT);
1782 }
d0709a65 1783 rcu_read_unlock();
688b88a4
RR		 1784}
1785
eadc8d9e
RR		 1786/*
1787 * After sending add Block Ack request we activated a timer until
1788 * add Block Ack response will arrive from the recipient.
1789 * If this timer expires sta_addba_resp_timer_expired will be executed.
1790 */
1791void sta_addba_resp_timer_expired(unsigned long data)
1792{
1793 /* not an elegant detour, but there is no choice as the timer passes
1794 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1795 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e 1796 * array gives the sta through container_of */
70d251b2 1797 u16 tid = *(u8 *)data;
eadc8d9e
RR		 1798 struct sta_info *temp_sta = container_of((void *)data,
1799 struct sta_info, timer_to_tid[tid]);
1800
1801 struct ieee80211_local *local = temp_sta->local;
1802 struct ieee80211_hw *hw = &local->hw;
1803 struct sta_info *sta;
1804 u8 *state;
1805
d0709a65
JB		 1806 rcu_read_lock();
1807
eadc8d9e 1808 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1809 if (!sta) {
1810 rcu_read_unlock();
eadc8d9e 1811 return;
d0709a65 1812 }
eadc8d9e 1813
cee24a3e 1814 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1815 /* check if the TID waits for addBA response */
07346f81 1816 spin_lock_bh(&sta->lock);
eadc8d9e 1817 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1818 spin_unlock_bh(&sta->lock);
eadc8d9e 1819 *state = HT_AGG_STATE_IDLE;
f4ea83dd 1820#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e
RR		 1821 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1822 "expecting addBA response there", tid);
f4ea83dd 1823#endif
eadc8d9e
RR		 1824 goto timer_expired_exit;
1825 }
1826
f4ea83dd 1827#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e 1828 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
f4ea83dd 1829#endif
eadc8d9e
RR		 1830
1831 /* go through the state check in stop_BA_session */
1832 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1833 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1834 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1835 WLAN_BACK_INITIATOR);
1836
1837timer_expired_exit:
d0709a65 1838 rcu_read_unlock();
eadc8d9e
RR		 1839}
1840
f698d856 1841void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
85249e5f 1842{
f698d856 1843 struct ieee80211_local *local = sdata->local;
85249e5f
RR		 1844 int i;
1845
1846 for (i = 0; i < STA_TID_NUM; i++) {
1847 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1848 WLAN_BACK_INITIATOR);
f698d856 1849 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
85249e5f
RR		 1850 WLAN_BACK_RECIPIENT,
1851 WLAN_REASON_QSTA_LEAVE_QBSS);
1852 }
1853}
07db2183 1854
f698d856 1855static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1856 struct ieee80211_msrment_ie *request_ie,
1857 const u8 *da, const u8 *bssid,
1858 u8 dialog_token)
1859{
f698d856 1860 struct ieee80211_local *local = sdata->local;
b6623486
AK		 1861 struct sk_buff *skb;
1862 struct ieee80211_mgmt *msr_report;
1863
1864 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1865 sizeof(struct ieee80211_msrment_ie));
1866
1867 if (!skb) {
1868 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1869 "measurement report frame\n", sdata->dev->name);
b6623486
AK		 1870 return;
1871 }
1872
1873 skb_reserve(skb, local->hw.extra_tx_headroom);
1874 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1875 memset(msr_report, 0, 24);
1876 memcpy(msr_report->da, da, ETH_ALEN);
f698d856 1877 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
b6623486 1878 memcpy(msr_report->bssid, bssid, ETH_ALEN);
e7827a70 1879 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
b6623486
AK		 1880 IEEE80211_STYPE_ACTION);
1881
1882 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1883 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1884 msr_report->u.action.u.measurement.action_code =
1885 WLAN_ACTION_SPCT_MSR_RPRT;
1886 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1887
1888 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1889 msr_report->u.action.u.measurement.length =
1890 sizeof(struct ieee80211_msrment_ie);
1891
1892 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1893 sizeof(struct ieee80211_msrment_ie));
1894 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1895 msr_report->u.action.u.measurement.msr_elem.mode |=
1896 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1897 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1898
f698d856 1899 ieee80211_sta_tx(sdata, skb, 0);
b6623486
AK		 1900}
1901
f698d856 1902static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1903 struct ieee80211_mgmt *mgmt,
1904 size_t len)
1905{
1906 /*
1907 * Ignoring measurement request is spec violation.
1908 * Mandatory measurements must be reported optional
1909 * measurements might be refused or reported incapable
1910 * For now just refuse
1911 * TODO: Answer basic measurement as unmeasured
1912 */
f698d856 1913 ieee80211_send_refuse_measurement_request(sdata,
b6623486
AK		 1914 &mgmt->u.action.u.measurement.msr_elem,
1915 mgmt->sa, mgmt->bssid,
1916 mgmt->u.action.u.measurement.dialog_token);
1917}
1918
1919
f698d856 1920static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1921 struct ieee80211_if_sta *ifsta,
1922 struct ieee80211_mgmt *mgmt,
1923 size_t len)
1924{
f0706e82 1925 u16 auth_alg, auth_transaction, status_code;
0795af57 1926 DECLARE_MAC_BUF(mac);
f0706e82 1927
48c2fc59 1928 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 1929 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1930 return;
f0706e82 1931
f4ea83dd 1932 if (len < 24 + 6)
f0706e82 1933 return;
f0706e82 1934
51fb61e7 1935 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1936 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1937 return;
f0706e82 1938
51fb61e7 1939 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1940 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1941 return;
f0706e82
JB		 1942
1943 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1944 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1945 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1946
51fb61e7 1947 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1948 /*
1949 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1950 * networks and most implementations do not seem to use it.
1951 * However, try to reply to authentication attempts if someone
1952 * has actually implemented this.
135a2110 1953 */
f4ea83dd 1954 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1955 return;
f698d856 1956 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1957 }
1958
1959 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1960 auth_transaction != ifsta->auth_transaction)
f0706e82 1961 return;
f0706e82
JB		 1962
1963 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1964 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1965 u8 algs[3];
1966 const int num_algs = ARRAY_SIZE(algs);
1967 int i, pos;
1968 algs[0] = algs[1] = algs[2] = 0xff;
1969 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1970 algs[0] = WLAN_AUTH_OPEN;
1971 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1972 algs[1] = WLAN_AUTH_SHARED_KEY;
1973 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1974 algs[2] = WLAN_AUTH_LEAP;
1975 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1976 pos = 0;
1977 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1978 pos = 1;
1979 else
1980 pos = 2;
1981 for (i = 0; i < num_algs; i++) {
1982 pos++;
1983 if (pos >= num_algs)
1984 pos = 0;
1985 if (algs[pos] == ifsta->auth_alg ||
1986 algs[pos] == 0xff)
1987 continue;
1988 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1989 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1990 continue;
1991 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1992 break;
1993 }
1994 }
1995 return;
1996 }
1997
1998 switch (ifsta->auth_alg) {
1999 case WLAN_AUTH_OPEN:
2000 case WLAN_AUTH_LEAP:
f698d856 2001 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 2002 break;
2003 case WLAN_AUTH_SHARED_KEY:
2004 if (ifsta->auth_transaction == 4)
f698d856 2005 ieee80211_auth_completed(sdata, ifsta);
f0706e82 2006 else
f698d856 2007 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 2008 break;
2009 }
2010}
2011
2012
f698d856 2013static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2014 struct ieee80211_if_sta *ifsta,
2015 struct ieee80211_mgmt *mgmt,
2016 size_t len)
2017{
2018 u16 reason_code;
0795af57 2019 DECLARE_MAC_BUF(mac);
f0706e82 2020
f4ea83dd 2021 if (len < 24 + 2)
f0706e82 2022 return;
f0706e82 2023
f4ea83dd 2024 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 2025 return;
f0706e82
JB		 2026
2027 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2028
988c0f72 2029 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 2030 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 2031
48c2fc59
TW		 2032 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
2033 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
2034 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 2035 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 2036 mod_timer(&ifsta->timer, jiffies +
2037 IEEE80211_RETRY_AUTH_INTERVAL);
2038 }
2039
aa458d17 2040 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 2041 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 2042}
2043
2044
f698d856 2045static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2046 struct ieee80211_if_sta *ifsta,
2047 struct ieee80211_mgmt *mgmt,
2048 size_t len)
2049{
2050 u16 reason_code;
0795af57 2051 DECLARE_MAC_BUF(mac);
f0706e82 2052
f4ea83dd 2053 if (len < 24 + 2)
f0706e82 2054 return;
f0706e82 2055
f4ea83dd 2056 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 2057 return;
f0706e82
JB		 2058
2059 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2060
d6f2da5b 2061 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 2062 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 2063
48c2fc59
TW		 2064 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
2065 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 2066 mod_timer(&ifsta->timer, jiffies +
2067 IEEE80211_RETRY_AUTH_INTERVAL);
2068 }
2069
aa458d17 2070 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 2071}
2072
2073
471b3efd 2074static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2075 struct ieee80211_if_sta *ifsta,
2076 struct ieee80211_mgmt *mgmt,
2077 size_t len,
2078 int reassoc)
2079{
471b3efd 2080 struct ieee80211_local *local = sdata->local;
8318d78a 2081 struct ieee80211_supported_band *sband;
f0706e82 2082 struct sta_info *sta;
8318d78a 2083 u64 rates, basic_rates;
f0706e82
JB		 2084 u16 capab_info, status_code, aid;
2085 struct ieee802_11_elems elems;
471b3efd 2086 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 2087 u8 *pos;
2088 int i, j;
0795af57 2089 DECLARE_MAC_BUF(mac);
8318d78a 2090 bool have_higher_than_11mbit = false;
f0706e82
JB		 2091
2092 /* AssocResp and ReassocResp have identical structure, so process both
2093 * of them in this function. */
2094
48c2fc59 2095 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 2096 return;
f0706e82 2097
f4ea83dd 2098 if (len < 24 + 6)
f0706e82 2099 return;
f0706e82 2100
f4ea83dd 2101 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 2102 return;
f0706e82
JB		 2103
2104 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2105 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2106 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 2107
0795af57 2108 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 2109 "status=%d aid=%d)\n",
f698d856 2110 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 2111 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 2112
2113 if (status_code != WLAN_STATUS_SUCCESS) {
2114 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 2115 sdata->dev->name, status_code);
8a69aa93
DD		 2116 /* if this was a reassociation, ensure we try a "full"
2117 * association next time. This works around some broken APs
2118 * which do not correctly reject reassociation requests. */
d6f2da5b 2119 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2120 return;
2121 }
2122
1dd84aa2
JB		 2123 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2124 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 2125 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 2126 aid &= ~(BIT(15) | BIT(14));
2127
f0706e82 2128 pos = mgmt->u.assoc_resp.variable;
67a4cce4 2129 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 2130
2131 if (!elems.supp_rates) {
2132 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 2133 sdata->dev->name);
f0706e82
JB		 2134 return;
2135 }
2136
f698d856 2137 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 2138 ifsta->aid = aid;
2139 ifsta->ap_capab = capab_info;
2140
2141 kfree(ifsta->assocresp_ies);
2142 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 2143 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 2144 if (ifsta->assocresp_ies)
2145 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2146
d0709a65
JB		 2147 rcu_read_lock();
2148
f0706e82
JB		 2149 /* Add STA entry for the AP */
2150 sta = sta_info_get(local, ifsta->bssid);
2151 if (!sta) {
2152 struct ieee80211_sta_bss *bss;
73651ee6 2153 int err;
d0709a65 2154
73651ee6
JB		 2155 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2156 if (!sta) {
2157 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 2158 " the AP\n", sdata->dev->name);
d0709a65 2159 rcu_read_unlock();
f0706e82
JB		 2160 return;
2161 }
60f8b39c
JB		 2162 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
2163 local->hw.conf.channel->center_freq,
2164 ifsta->ssid, ifsta->ssid_len);
2165 if (bss) {
2166 sta->last_signal = bss->signal;
2167 sta->last_qual = bss->qual;
2168 sta->last_noise = bss->noise;
2169 ieee80211_rx_bss_put(local, bss);
2170 }
f709fc69 2171
60f8b39c
JB		 2172 err = sta_info_insert(sta);
2173 if (err) {
2174 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2175 " the AP (error %d)\n", sdata->dev->name, err);
2176 rcu_read_unlock();
2177 return;
f709fc69 2178 }
60f8b39c
JB		 2179 /* update new sta with its last rx activity */
2180 sta->last_rx = jiffies;
f709fc69 2181 }
f709fc69 2182
60f8b39c
JB		 2183 /*
2184 * FIXME: Do we really need to update the sta_info's information here?
2185 * We already know about the AP (we found it in our list) so it
2186 * should already be filled with the right info, no?
2187 * As is stands, all this is racy because typically we assume
2188 * the information that is filled in here (except flags) doesn't
2189 * change while a STA structure is alive. As such, it should move
2190 * to between the sta_info_alloc() and sta_info_insert() above.
2191 */
f709fc69 2192
60f8b39c
JB		 2193 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2194 WLAN_STA_AUTHORIZED);
05e5e883 2195
60f8b39c
JB		 2196 rates = 0;
2197 basic_rates = 0;
2198 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 2199
60f8b39c
JB		 2200 for (i = 0; i < elems.supp_rates_len; i++) {
2201 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 2202
60f8b39c
JB		 2203 if (rate > 110)
2204 have_higher_than_11mbit = true;
2205
2206 for (j = 0; j < sband->n_bitrates; j++) {
2207 if (sband->bitrates[j].bitrate == rate)
2208 rates |= BIT(j);
2209 if (elems.supp_rates[i] & 0x80)
2210 basic_rates |= BIT(j);
f709fc69 2211 }
f709fc69
LCC		 2212 }
2213
60f8b39c
JB		 2214 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2215 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 2216
60f8b39c
JB		 2217 if (rate > 110)
2218 have_higher_than_11mbit = true;
f0706e82 2219
60f8b39c
JB		 2220 for (j = 0; j < sband->n_bitrates; j++) {
2221 if (sband->bitrates[j].bitrate == rate)
2222 rates |= BIT(j);
2223 if (elems.ext_supp_rates[i] & 0x80)
2224 basic_rates |= BIT(j);
2225 }
1ebebea8 2226 }
f0706e82 2227
60f8b39c
JB		 2228 sta->supp_rates[local->hw.conf.channel->band] = rates;
2229 sdata->basic_rates = basic_rates;
2230
2231 /* cf. IEEE 802.11 9.2.12 */
2232 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2233 have_higher_than_11mbit)
2234 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2235 else
2236 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2237
60f8b39c
JB		 2238 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2239 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2240 struct ieee80211_ht_bss_info bss_info;
2241 ieee80211_ht_cap_ie_to_ht_info(
2242 (struct ieee80211_ht_cap *)
2243 elems.ht_cap_elem, &sta->ht_info);
2244 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2245 (struct ieee80211_ht_addt_info *)
2246 elems.ht_info_elem, &bss_info);
2247 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2248 }
f0706e82 2249
60f8b39c 2250 rate_control_rate_init(sta, local);
f0706e82 2251
60f8b39c
JB		 2252 if (elems.wmm_param) {
2253 set_sta_flags(sta, WLAN_STA_WME);
2254 rcu_read_unlock();
2255 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2256 elems.wmm_param_len);
2257 } else
2258 rcu_read_unlock();
f0706e82 2259
60f8b39c
JB		 2260 /* set AID and assoc capability,
2261 * ieee80211_set_associated() will tell the driver */
2262 bss_conf->aid = aid;
2263 bss_conf->assoc_capability = capab_info;
2264 ieee80211_set_associated(sdata, ifsta);
f0706e82 2265
60f8b39c 2266 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 2267}
2268
2269
f698d856 2270static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 2271 struct ieee80211_if_sta *ifsta,
2272 struct ieee80211_sta_bss *bss)
2273{
f698d856 2274 struct ieee80211_local *local = sdata->local;
a607268a
BR		 2275 int res, rates, i, j;
2276 struct sk_buff *skb;
2277 struct ieee80211_mgmt *mgmt;
a607268a 2278 u8 *pos;
a607268a 2279 struct ieee80211_supported_band *sband;
507b06d0 2280 union iwreq_data wrqu;
a607268a
BR		 2281
2282 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2283
2284 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2285 sta_info_flush_delayed(sdata);
a607268a
BR		 2286
2287 if (local->ops->reset_tsf) {
2288 /* Reset own TSF to allow time synchronization work. */
2289 local->ops->reset_tsf(local_to_hw(local));
2290 }
2291 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 2292 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 2293 if (res)
2294 return res;
2295
2296 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2297
a607268a
BR		 2298 sdata->drop_unencrypted = bss->capability &
2299 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2300
f698d856 2301 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 2302
be038b37
AK		 2303 if (res)
2304 return res;
a607268a 2305
9d139c81 2306 /* Build IBSS probe response */
a607268a 2307 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 2308 if (skb) {
a607268a
BR		 2309 skb_reserve(skb, local->hw.extra_tx_headroom);
2310
2311 mgmt = (struct ieee80211_mgmt *)
2312 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2313 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 2314 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2315 IEEE80211_STYPE_PROBE_RESP);
a607268a 2316 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 2317 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 2318 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2319 mgmt->u.beacon.beacon_int =
2320 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 2321 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 2322 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2323
2324 pos = skb_put(skb, 2 + ifsta->ssid_len);
2325 *pos++ = WLAN_EID_SSID;
2326 *pos++ = ifsta->ssid_len;
2327 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2328
2329 rates = bss->supp_rates_len;
2330 if (rates > 8)
2331 rates = 8;
2332 pos = skb_put(skb, 2 + rates);
2333 *pos++ = WLAN_EID_SUPP_RATES;
2334 *pos++ = rates;
2335 memcpy(pos, bss->supp_rates, rates);
2336
2337 if (bss->band == IEEE80211_BAND_2GHZ) {
2338 pos = skb_put(skb, 2 + 1);
2339 *pos++ = WLAN_EID_DS_PARAMS;
2340 *pos++ = 1;
2341 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2342 }
2343
2344 pos = skb_put(skb, 2 + 2);
2345 *pos++ = WLAN_EID_IBSS_PARAMS;
2346 *pos++ = 2;
2347 /* FIX: set ATIM window based on scan results */
2348 *pos++ = 0;
2349 *pos++ = 0;
2350
2351 if (bss->supp_rates_len > 8) {
2352 rates = bss->supp_rates_len - 8;
2353 pos = skb_put(skb, 2 + rates);
2354 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2355 *pos++ = rates;
2356 memcpy(pos, &bss->supp_rates[8], rates);
2357 }
2358
9d139c81 2359 ifsta->probe_resp = skb;
e039fa4a 2360
9d139c81
JB		 2361 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2362 }
a607268a 2363
9d139c81
JB		 2364 rates = 0;
2365 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2366 for (i = 0; i < bss->supp_rates_len; i++) {
2367 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2368 for (j = 0; j < sband->n_bitrates; j++)
2369 if (sband->bitrates[j].bitrate == bitrate)
2370 rates |= BIT(j);
a607268a 2371 }
9d139c81
JB		 2372 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2373
f698d856 2374 ieee80211_sta_def_wmm_params(sdata, bss, 1);
a607268a 2375
48c2fc59 2376 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 2377 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2378
507b06d0
DW		 2379 memset(&wrqu, 0, sizeof(wrqu));
2380 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 2381 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 2382
2383 return res;
2384}
2385
f709fc69
LCC		 2386u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2387 struct ieee802_11_elems *elems,
2388 enum ieee80211_band band)
2389{
2390 struct ieee80211_supported_band *sband;
2391 struct ieee80211_rate *bitrates;
2392 size_t num_rates;
2393 u64 supp_rates;
2394 int i, j;
2395 sband = local->hw.wiphy->bands[band];
2396
2397 if (!sband) {
2398 WARN_ON(1);
2399 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2400 }
2401
2402 bitrates = sband->bitrates;
2403 num_rates = sband->n_bitrates;
2404 supp_rates = 0;
2405 for (i = 0; i < elems->supp_rates_len +
2406 elems->ext_supp_rates_len; i++) {
2407 u8 rate = 0;
2408 int own_rate;
2409 if (i < elems->supp_rates_len)
2410 rate = elems->supp_rates[i];
2411 else if (elems->ext_supp_rates)
2412 rate = elems->ext_supp_rates
2413 [i - elems->supp_rates_len];
2414 own_rate = 5 * (rate & 0x7f);
2415 for (j = 0; j < num_rates; j++)
2416 if (bitrates[j].bitrate == own_rate)
2417 supp_rates |= BIT(j);
2418 }
2419 return supp_rates;
2420}
2421
8e1535d5
EG		 2422static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2423 enum ieee80211_band band)
2424{
2425 struct ieee80211_supported_band *sband;
2426 struct ieee80211_rate *bitrates;
2427 u64 mandatory_rates;
2428 enum ieee80211_rate_flags mandatory_flag;
2429 int i;
2430
2431 sband = local->hw.wiphy->bands[band];
2432 if (!sband) {
2433 WARN_ON(1);
2434 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2435 }
2436
2437 if (band == IEEE80211_BAND_2GHZ)
2438 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2439 else
2440 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2441
2442 bitrates = sband->bitrates;
2443 mandatory_rates = 0;
2444 for (i = 0; i < sband->n_bitrates; i++)
2445 if (bitrates[i].flags & mandatory_flag)
2446 mandatory_rates |= BIT(i);
2447 return mandatory_rates;
2448}
a607268a 2449
f698d856 2450static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2451 struct ieee80211_mgmt *mgmt,
2452 size_t len,
2453 struct ieee80211_rx_status *rx_status,
9859b81e 2454 struct ieee802_11_elems *elems)
f0706e82 2455{
f698d856 2456 struct ieee80211_local *local = sdata->local;
8318d78a 2457 int freq, clen;
f0706e82
JB		 2458 struct ieee80211_sta_bss *bss;
2459 struct sta_info *sta;
fab7d4a2 2460 struct ieee80211_channel *channel;
8e1535d5
EG		 2461 u64 beacon_timestamp, rx_timestamp;
2462 u64 supp_rates = 0;
9859b81e 2463 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
8e1535d5 2464 enum ieee80211_band band = rx_status->band;
0795af57
JP		 2465 DECLARE_MAC_BUF(mac);
2466 DECLARE_MAC_BUF(mac2);
f0706e82 2467
5bda6175
JB		 2468 if (elems->ds_params && elems->ds_params_len == 1)
2469 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2470 else
2471 freq = rx_status->freq;
2472
2473 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2474
2475 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2476 return;
f0706e82 2477
ae6a44e3 2478 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
f698d856 2479 elems->mesh_config && mesh_matches_local(elems, sdata)) {
8e1535d5 2480 supp_rates = ieee80211_sta_get_rates(local, elems, band);
902acc78 2481
8e1535d5 2482 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
f698d856 2483 mesh_peer_accepts_plinks(elems));
902acc78 2484 }
f709fc69 2485
ae6a44e3 2486 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
8e1535d5 2487 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
8e1535d5
EG		 2488 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2489
69e6c010
JB		 2490 rcu_read_lock();
2491
8e1535d5
EG		 2492 sta = sta_info_get(local, mgmt->sa);
2493 if (sta) {
2494 u64 prev_rates;
2495
2496 prev_rates = sta->supp_rates[band];
2497 /* make sure mandatory rates are always added */
2498 sta->supp_rates[band] = supp_rates |
2499 ieee80211_sta_get_mandatory_rates(local, band);
2500
2501#ifdef CONFIG_MAC80211_IBSS_DEBUG
2502 if (sta->supp_rates[band] != prev_rates)
2503 printk(KERN_DEBUG "%s: updated supp_rates set "
2504 "for %s based on beacon info (0x%llx | "
2505 "0x%llx -> 0x%llx)\n",
2506 sdata->dev->name, print_mac(mac, sta->addr),
2507 (unsigned long long) prev_rates,
2508 (unsigned long long) supp_rates,
2509 (unsigned long long) sta->supp_rates[band]);
2510#endif
2511 } else {
2512 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2513 mgmt->sa, supp_rates);
f0706e82 2514 }
f0706e82 2515
69e6c010
JB		 2516 rcu_read_unlock();
2517 }
d0709a65 2518
f709fc69 2519#ifdef CONFIG_MAC80211_MESH
ae6a44e3 2520 if (elems->mesh_config)
f698d856 2521 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
ae6a44e3 2522 elems->mesh_id_len, elems->mesh_config, freq);
f709fc69
LCC		 2523 else
2524#endif
f698d856 2525 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
ae6a44e3 2526 elems->ssid, elems->ssid_len);
f709fc69
LCC		 2527 if (!bss) {
2528#ifdef CONFIG_MAC80211_MESH
ae6a44e3 2529 if (elems->mesh_config)
f698d856 2530 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
ae6a44e3
EK		 2531 elems->mesh_id_len, elems->mesh_config,
2532 elems->mesh_config_len, freq);
f709fc69
LCC		 2533 else
2534#endif
f698d856 2535 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
ae6a44e3 2536 elems->ssid, elems->ssid_len);
f0706e82
JB		 2537 if (!bss)
2538 return;
2539 } else {
2540#if 0
2541 /* TODO: order by RSSI? */
2542 spin_lock_bh(&local->sta_bss_lock);
2543 list_move_tail(&bss->list, &local->sta_bss_list);
2544 spin_unlock_bh(&local->sta_bss_lock);
2545#endif
2546 }
2547
5628221c 2548 /* save the ERP value so that it is available at association time */
ae6a44e3
EK		 2549 if (elems->erp_info && elems->erp_info_len >= 1) {
2550 bss->erp_value = elems->erp_info[0];
5628221c
DD		 2551 bss->has_erp_value = 1;
2552 }
2553
f0706e82
JB		 2554 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2555 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82 2556
98f7dfd8
EG		 2557 if (elems->tim) {
2558 struct ieee80211_tim_ie *tim_ie =
2559 (struct ieee80211_tim_ie *)elems->tim;
2560 bss->dtim_period = tim_ie->dtim_period;
2561 }
2562
2563 /* set default value for buggy APs */
2564 if (!elems->tim || bss->dtim_period == 0)
2565 bss->dtim_period = 1;
2566
f0706e82 2567 bss->supp_rates_len = 0;
ae6a44e3 2568 if (elems->supp_rates) {
f0706e82 2569 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
ae6a44e3
EK		 2570 if (clen > elems->supp_rates_len)
2571 clen = elems->supp_rates_len;
2572 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
f0706e82
JB		 2573 clen);
2574 bss->supp_rates_len += clen;
2575 }
ae6a44e3 2576 if (elems->ext_supp_rates) {
f0706e82 2577 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
ae6a44e3
EK		 2578 if (clen > elems->ext_supp_rates_len)
2579 clen = elems->ext_supp_rates_len;
f0706e82 2580 memcpy(&bss->supp_rates[bss->supp_rates_len],
ae6a44e3 2581 elems->ext_supp_rates, clen);
f0706e82
JB		 2582 bss->supp_rates_len += clen;
2583 }
2584
8e1535d5 2585 bss->band = band;
30b89b0f 2586
5bda6175
JB		 2587 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2588
30b89b0f
JB		 2589 bss->timestamp = beacon_timestamp;
2590 bss->last_update = jiffies;
30b89b0f
JB		 2591 bss->signal = rx_status->signal;
2592 bss->noise = rx_status->noise;
566bfe5a 2593 bss->qual = rx_status->qual;
9859b81e
RR		 2594 if (!beacon)
2595 bss->last_probe_resp = jiffies;
30b89b0f
JB		 2596 /*
2597 * In STA mode, the remaining parameters should not be overridden
2598 * by beacons because they're not necessarily accurate there.
2599 */
2600 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 2601 bss->last_probe_resp && beacon) {
3e122be0 2602 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 2603 return;
2604 }
2605
43ac2ca3
JM		 2606 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2607 kfree(bss->ies);
2608 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
f0706e82 2609 }
43ac2ca3
JM		 2610 if (bss->ies) {
2611 memcpy(bss->ies, elems->ie_start, elems->total_len);
2612 bss->ies_len = elems->total_len;
2613 } else
2614 bss->ies_len = 0;
f0706e82 2615
43ac2ca3 2616 bss->wmm_used = elems->wmm_param || elems->wmm_info;
9d9bf77d
BR		 2617
2618 /* check if we need to merge IBSS */
2619 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2620 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2621 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 2622 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 2623 elems->ssid_len == sdata->u.sta.ssid_len &&
2624 memcmp(elems->ssid, sdata->u.sta.ssid,
2625 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 2626 if (rx_status->flag & RX_FLAG_TSFT) {
2627 /* in order for correct IBSS merging we need mactime
2628 *
2629 * since mactime is defined as the time the first data
2630 * symbol of the frame hits the PHY, and the timestamp
2631 * of the beacon is defined as "the time that the data
2632 * symbol containing the first bit of the timestamp is
2633 * transmitted to the PHY plus the transmitting STA’s
2634 * delays through its local PHY from the MAC-PHY
2635 * interface to its interface with the WM"
2636 * (802.11 11.1.2) - equals the time this bit arrives at
2637 * the receiver - we have to take into account the
2638 * offset between the two.
2639 * e.g: at 1 MBit that means mactime is 192 usec earlier
2640 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2641 */
8e1535d5 2642 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 2643 bitrates[rx_status->rate_idx].bitrate;
2644 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2645 } else if (local && local->ops && local->ops->get_tsf)
2646 /* second best option: get current TSF */
2647 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2648 else
2649 /* can't merge without knowing the TSF */
2650 rx_timestamp = -1LLU;
2651#ifdef CONFIG_MAC80211_IBSS_DEBUG
2652 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2653 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2654 print_mac(mac, mgmt->sa),
2655 print_mac(mac2, mgmt->bssid),
2656 (unsigned long long)rx_timestamp,
2657 (unsigned long long)beacon_timestamp,
2658 (unsigned long long)(rx_timestamp - beacon_timestamp),
2659 jiffies);
2660#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2661 if (beacon_timestamp > rx_timestamp) {
576fdeae 2662#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 2663 printk(KERN_DEBUG "%s: beacon TSF higher than "
2664 "local TSF - IBSS merge with BSSID %s\n",
f698d856 2665 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 2666#endif
f698d856
JBG		 2667 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2668 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 2669 mgmt->bssid, mgmt->sa,
8e1535d5 2670 supp_rates);
9d9bf77d
BR		 2671 }
2672 }
2673
3e122be0 2674 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2675}
2676
2677
f698d856 2678static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2679 struct ieee80211_mgmt *mgmt,
2680 size_t len,
2681 struct ieee80211_rx_status *rx_status)
2682{
ae6a44e3
EK		 2683 size_t baselen;
2684 struct ieee802_11_elems elems;
9859b81e 2685 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 2686
8e7cdbb6
TW		 2687 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2688 return; /* ignore ProbeResp to foreign address */
2689
ae6a44e3
EK		 2690 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2691 if (baselen > len)
2692 return;
2693
2694 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2695 &elems);
2696
9859b81e
RR		 2697 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2698
2699 /* direct probe may be part of the association flow */
2700 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2701 &ifsta->request)) {
2702 printk(KERN_DEBUG "%s direct probe responded\n",
2703 sdata->dev->name);
2704 ieee80211_authenticate(sdata, ifsta);
2705 }
f0706e82
JB		 2706}
2707
2708
f698d856 2709static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2710 struct ieee80211_mgmt *mgmt,
2711 size_t len,
2712 struct ieee80211_rx_status *rx_status)
2713{
f0706e82 2714 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2715 size_t baselen;
2716 struct ieee802_11_elems elems;
f698d856 2717 struct ieee80211_local *local = sdata->local;
d3c990fb 2718 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2719 u32 changed = 0;
f0706e82 2720
ae6a44e3
EK		 2721 /* Process beacon from the current BSS */
2722 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2723 if (baselen > len)
2724 return;
2725
2726 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2727
9859b81e 2728 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
f0706e82 2729
51fb61e7 2730 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2731 return;
2732 ifsta = &sdata->u.sta;
2733
d6f2da5b 2734 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2735 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2736 return;
2737
d18ef29f 2738 /* Do not send changes to driver if we are scanning. This removes
fe3fa827
JB		 2739 * requirement that a driver's bss_info_changed/conf_tx functions
2740 * need to be atomic.
2741 * This is really ugly code, we should rewrite scanning and make
2742 * all this more understandable for humans.
2743 */
d18ef29f
RC		 2744 if (local->sta_sw_scanning || local->sta_hw_scanning)
2745 return;
2746
fe3fa827
JB		 2747 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2748 elems.wmm_param_len);
2749
5628221c 2750 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2751 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2752 else {
2753 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2754 changed |= ieee80211_handle_protect_preamb(sdata, false,
2755 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2756 }
f0706e82 2757
d3c990fb 2758 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2759 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2760 struct ieee80211_ht_bss_info bss_info;
2761
2762 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2763 (struct ieee80211_ht_addt_info *)
2764 elems.ht_info_elem, &bss_info);
38668c05
TW		 2765 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2766 &bss_info);
d3c990fb
RR		 2767 }
2768
471b3efd 2769 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2770}
2771
2772
f698d856 2773static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2774 struct ieee80211_if_sta *ifsta,
2775 struct ieee80211_mgmt *mgmt,
2776 size_t len,
2777 struct ieee80211_rx_status *rx_status)
2778{
f698d856 2779 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2780 int tx_last_beacon;
2781 struct sk_buff *skb;
2782 struct ieee80211_mgmt *resp;
2783 u8 *pos, *end;
0795af57
JP		 2784 DECLARE_MAC_BUF(mac);
2785#ifdef CONFIG_MAC80211_IBSS_DEBUG
2786 DECLARE_MAC_BUF(mac2);
2787 DECLARE_MAC_BUF(mac3);
2788#endif
f0706e82 2789
51fb61e7 2790 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 2791 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2792 len < 24 + 2 || !ifsta->probe_resp)
2793 return;
2794
2795 if (local->ops->tx_last_beacon)
2796 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2797 else
2798 tx_last_beacon = 1;
2799
2800#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2801 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2802 "%s (tx_last_beacon=%d)\n",
f698d856 2803 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 2804 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2805#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2806
2807 if (!tx_last_beacon)
2808 return;
2809
2810 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2811 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2812 return;
2813
2814 end = ((u8 *) mgmt) + len;
2815 pos = mgmt->u.probe_req.variable;
2816 if (pos[0] != WLAN_EID_SSID ||
2817 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2818#ifdef CONFIG_MAC80211_IBSS_DEBUG
2819 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2820 "from %s\n",
f698d856 2821 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 2822#endif
f0706e82
JB		 2823 return;
2824 }
2825 if (pos[1] != 0 &&
2826 (pos[1] != ifsta->ssid_len ||
2827 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2828 /* Ignore ProbeReq for foreign SSID */
2829 return;
2830 }
2831
2832 /* Reply with ProbeResp */
0ec0b7ac 2833 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2834 if (!skb)
2835 return;
2836
2837 resp = (struct ieee80211_mgmt *) skb->data;
2838 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2839#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2840 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 2841 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 2842#endif /* CONFIG_MAC80211_IBSS_DEBUG */
f698d856 2843 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 2844}
2845
f698d856 2846static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
4e20cb29
JB		 2847 struct ieee80211_if_sta *ifsta,
2848 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2849 size_t len,
2850 struct ieee80211_rx_status *rx_status)
9f985b0e 2851{
f698d856 2852 struct ieee80211_local *local = sdata->local;
f709fc69 2853
9c80d3dc
JB		 2854 /* all categories we currently handle have action_code */
2855 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
9f985b0e
RR		 2856 return;
2857
2858 switch (mgmt->u.action.category) {
b6623486
AK		 2859 case WLAN_CATEGORY_SPECTRUM_MGMT:
2860 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2861 break;
5fd12d4d 2862 switch (mgmt->u.action.u.measurement.action_code) {
b6623486
AK		 2863 case WLAN_ACTION_SPCT_MSR_REQ:
2864 if (len < (IEEE80211_MIN_ACTION_SIZE +
2865 sizeof(mgmt->u.action.u.measurement)))
2866 break;
f698d856 2867 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
b6623486
AK		 2868 break;
2869 }
2870 break;
9f985b0e
RR		 2871 case WLAN_CATEGORY_BACK:
2872 switch (mgmt->u.action.u.addba_req.action_code) {
2873 case WLAN_ACTION_ADDBA_REQ:
2874 if (len < (IEEE80211_MIN_ACTION_SIZE +
2875 sizeof(mgmt->u.action.u.addba_req)))
2876 break;
f698d856 2877 ieee80211_sta_process_addba_request(local, mgmt, len);
9f985b0e 2878 break;
eadc8d9e
RR		 2879 case WLAN_ACTION_ADDBA_RESP:
2880 if (len < (IEEE80211_MIN_ACTION_SIZE +
2881 sizeof(mgmt->u.action.u.addba_resp)))
2882 break;
f698d856 2883 ieee80211_sta_process_addba_resp(local, mgmt, len);
eadc8d9e 2884 break;
688b88a4
RR		 2885 case WLAN_ACTION_DELBA:
2886 if (len < (IEEE80211_MIN_ACTION_SIZE +
2887 sizeof(mgmt->u.action.u.delba)))
2888 break;
f698d856 2889 ieee80211_sta_process_delba(sdata, mgmt, len);
688b88a4 2890 break;
9f985b0e
RR		 2891 }
2892 break;
f709fc69 2893 case PLINK_CATEGORY:
902acc78 2894 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2895 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
f709fc69 2896 break;
f709fc69 2897 case MESH_PATH_SEL_CATEGORY:
902acc78 2898 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2899 mesh_rx_path_sel_frame(sdata, mgmt, len);
f709fc69 2900 break;
9f985b0e
RR		 2901 }
2902}
f0706e82 2903
f698d856 2904void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2905 struct ieee80211_rx_status *rx_status)
2906{
f698d856 2907 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2908 struct ieee80211_if_sta *ifsta;
2909 struct ieee80211_mgmt *mgmt;
2910 u16 fc;
2911
2912 if (skb->len < 24)
2913 goto fail;
2914
f0706e82
JB		 2915 ifsta = &sdata->u.sta;
2916
2917 mgmt = (struct ieee80211_mgmt *) skb->data;
2918 fc = le16_to_cpu(mgmt->frame_control);
2919
2920 switch (fc & IEEE80211_FCTL_STYPE) {
2921 case IEEE80211_STYPE_PROBE_REQ:
2922 case IEEE80211_STYPE_PROBE_RESP:
2923 case IEEE80211_STYPE_BEACON:
f709fc69 2924 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2925 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2926 case IEEE80211_STYPE_AUTH:
2927 case IEEE80211_STYPE_ASSOC_RESP:
2928 case IEEE80211_STYPE_REASSOC_RESP:
2929 case IEEE80211_STYPE_DEAUTH:
2930 case IEEE80211_STYPE_DISASSOC:
2931 skb_queue_tail(&ifsta->skb_queue, skb);
2932 queue_work(local->hw.workqueue, &ifsta->work);
2933 return;
f0706e82
JB		 2934 }
2935
2936 fail:
2937 kfree_skb(skb);
2938}
2939
f698d856 2940static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2941 struct sk_buff *skb)
2942{
2943 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2944 struct ieee80211_if_sta *ifsta;
2945 struct ieee80211_mgmt *mgmt;
2946 u16 fc;
2947
f0706e82
JB		 2948 ifsta = &sdata->u.sta;
2949
2950 rx_status = (struct ieee80211_rx_status *) skb->cb;
2951 mgmt = (struct ieee80211_mgmt *) skb->data;
2952 fc = le16_to_cpu(mgmt->frame_control);
2953
2954 switch (fc & IEEE80211_FCTL_STYPE) {
2955 case IEEE80211_STYPE_PROBE_REQ:
f698d856 2956 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 2957 rx_status);
2958 break;
2959 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2960 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2961 break;
2962 case IEEE80211_STYPE_BEACON:
f698d856 2963 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2964 break;
2965 case IEEE80211_STYPE_AUTH:
f698d856 2966 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2967 break;
2968 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2969 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2970 break;
2971 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2972 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2973 break;
2974 case IEEE80211_STYPE_DEAUTH:
f698d856 2975 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2976 break;
2977 case IEEE80211_STYPE_DISASSOC:
f698d856 2978 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82 2979 break;
9f985b0e 2980 case IEEE80211_STYPE_ACTION:
f698d856 2981 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
9f985b0e 2982 break;
f0706e82
JB		 2983 }
2984
2985 kfree_skb(skb);
2986}
2987
2988
9ae54c84 2989ieee80211_rx_result
f698d856 2990ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
ece8eddd 2991 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2992{
2993 struct ieee80211_mgmt *mgmt;
4e3996fe 2994 __le16 fc;
f0706e82 2995
ece8eddd 2996 if (skb->len < 2)
e4c26add 2997 return RX_DROP_UNUSABLE;
f0706e82
JB		 2998
2999 mgmt = (struct ieee80211_mgmt *) skb->data;
4e3996fe 3000 fc = mgmt->frame_control;
f0706e82 3001
4e3996fe 3002 if (ieee80211_is_ctl(fc))
9ae54c84 3003 return RX_CONTINUE;
ece8eddd
ZY		 3004
3005 if (skb->len < 24)
e4c26add 3006 return RX_DROP_MONITOR;
ece8eddd 3007
4e3996fe 3008 if (ieee80211_is_probe_resp(fc)) {
f698d856 3009 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
4e3996fe
HH		 3010 dev_kfree_skb(skb);
3011 return RX_QUEUED;
f0706e82 3012 }
4e3996fe
HH		 3013
3014 if (ieee80211_is_beacon(fc)) {
f698d856 3015 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4e3996fe
HH		 3016 dev_kfree_skb(skb);
3017 return RX_QUEUED;
3018 }
3019
9ae54c84 3020 return RX_CONTINUE;
f0706e82
JB		 3021}
3022
3023
f698d856 3024static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 3025{
f698d856 3026 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3027 int active = 0;
3028 struct sta_info *sta;
3029
d0709a65
JB		 3030 rcu_read_lock();
3031
3032 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3033 if (sta->sdata == sdata &&
f0706e82
JB		 3034 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3035 jiffies)) {
3036 active++;
3037 break;
3038 }
3039 }
d0709a65
JB		 3040
3041 rcu_read_unlock();
f0706e82
JB		 3042
3043 return active;
3044}
3045
3046
f698d856 3047static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
f0706e82 3048{
f698d856 3049 struct ieee80211_local *local = sdata->local;
f0706e82 3050 struct sta_info *sta, *tmp;
be8755e1 3051 LIST_HEAD(tmp_list);
0795af57 3052 DECLARE_MAC_BUF(mac);
d0709a65 3053 unsigned long flags;
f0706e82 3054
d0709a65 3055 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3056 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3057 if (time_after(jiffies, sta->last_rx + exp_time)) {
f4ea83dd 3058#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 3059 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
f698d856 3060 sdata->dev->name, print_mac(mac, sta->addr));
f4ea83dd 3061#endif
cb585bcc 3062 __sta_info_unlink(&sta);
d0709a65
JB		 3063 if (sta)
3064 list_add(&sta->list, &tmp_list);
f0706e82 3065 }
d0709a65 3066 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3067
d0709a65
JB		 3068 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3069 sta_info_destroy(sta);
f0706e82
JB		 3070}
3071
3072
f698d856 3073static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3074 struct ieee80211_if_sta *ifsta)
3075{
3076 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3077
f698d856
JBG		 3078 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3079 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 3080 return;
3081
3082 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 3083 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3084 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 3085}
3086
3087
f709fc69 3088#ifdef CONFIG_MAC80211_MESH
f698d856 3089static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
f709fc69
LCC		 3090 struct ieee80211_if_sta *ifsta)
3091{
f709fc69
LCC		 3092 bool free_plinks;
3093
f698d856
JBG		 3094 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3095 mesh_path_expire(sdata);
f709fc69
LCC		 3096
3097 free_plinks = mesh_plink_availables(sdata);
3098 if (free_plinks != sdata->u.sta.accepting_plinks)
9d139c81 3099 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3100
3101 mod_timer(&ifsta->timer, jiffies +
3102 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3103}
3104
3105
f698d856 3106void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
f709fc69
LCC		 3107{
3108 struct ieee80211_if_sta *ifsta;
f709fc69 3109 ifsta = &sdata->u.sta;
48c2fc59 3110 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
f709fc69 3111 ieee80211_sta_timer((unsigned long)sdata);
56a6d13d 3112 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3113}
3114#endif
3115
3116
f0706e82
JB		 3117void ieee80211_sta_timer(unsigned long data)
3118{
60f8b39c
JB		 3119 struct ieee80211_sub_if_data *sdata =
3120 (struct ieee80211_sub_if_data *) data;
3121 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3122 struct ieee80211_local *local = sdata->local;
f0706e82 3123
60f8b39c
JB		 3124 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3125 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 3126}
3127
f698d856 3128static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3129 struct ieee80211_if_sta *ifsta)
3130{
f698d856 3131 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3132
3133 if (local->ops->reset_tsf) {
3134 /* Reset own TSF to allow time synchronization work. */
3135 local->ops->reset_tsf(local_to_hw(local));
3136 }
3137
3138 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3139
3140
3141 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3142 ifsta->auth_alg = WLAN_AUTH_OPEN;
3143 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3144 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3145 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3146 ifsta->auth_alg = WLAN_AUTH_LEAP;
3147 else
3148 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 3149 ifsta->auth_transaction = -1;
d6f2da5b 3150 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 3151 ifsta->assoc_scan_tries = 0;
9859b81e 3152 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 3153 ifsta->auth_tries = 0;
3154 ifsta->assoc_tries = 0;
24e64622 3155 netif_tx_stop_all_queues(sdata->dev);
f698d856 3156 netif_carrier_off(sdata->dev);
f0706e82
JB		 3157}
3158
3159
f698d856 3160void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3161 struct ieee80211_if_sta *ifsta)
3162{
f698d856 3163 struct ieee80211_local *local = sdata->local;
f0706e82 3164
51fb61e7 3165 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3166 return;
3167
d6f2da5b 3168 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3b7ee69d 3169 IEEE80211_STA_AUTO_BSSID_SEL)) &&
d6f2da5b 3170 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3b7ee69d
TW		 3171 IEEE80211_STA_AUTO_SSID_SEL))) {
3172
3173 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
3174 ieee80211_set_disassoc(sdata, ifsta, true, true,
3175 WLAN_REASON_DEAUTH_LEAVING);
3176
f0706e82
JB		 3177 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3178 queue_work(local->hw.workqueue, &ifsta->work);
3179 }
3180}
3181
3182static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3183 const char *ssid, int ssid_len)
3184{
3185 int tmp, hidden_ssid;
3186
48225709
MW		 3187 if (ssid_len == ifsta->ssid_len &&
3188 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3189 return 1;
3190
d6f2da5b 3191 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3192 return 0;
3193
3194 hidden_ssid = 1;
3195 tmp = ssid_len;
3196 while (tmp--) {
3197 if (ssid[tmp] != '\0') {
3198 hidden_ssid = 0;
3199 break;
3200 }
3201 }
3202
3203 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3204 return 1;
3205
3206 if (ssid_len == 1 && ssid[0] == ' ')
3207 return 1;
3208
3209 return 0;
3210}
3211
f698d856 3212static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3213 struct ieee80211_if_sta *ifsta)
3214{
f698d856 3215 struct ieee80211_local *local = sdata->local;
f0706e82 3216 struct ieee80211_sta_bss *bss;
8318d78a 3217 struct ieee80211_supported_band *sband;
f0706e82
JB		 3218 u8 bssid[ETH_ALEN], *pos;
3219 int i;
167ad6f7 3220 int ret;
0795af57 3221 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3222
3223#if 0
3224 /* Easier testing, use fixed BSSID. */
3225 memset(bssid, 0xfe, ETH_ALEN);
3226#else
3227 /* Generate random, not broadcast, locally administered BSSID. Mix in
3228 * own MAC address to make sure that devices that do not have proper
3229 * random number generator get different BSSID. */
3230 get_random_bytes(bssid, ETH_ALEN);
3231 for (i = 0; i < ETH_ALEN; i++)
f698d856 3232 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 3233 bssid[0] &= ~0x01;
3234 bssid[0] |= 0x02;
3235#endif
3236
0795af57 3237 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 3238 sdata->dev->name, print_mac(mac, bssid));
f0706e82 3239
f698d856 3240 bss = ieee80211_rx_bss_add(sdata, bssid,
8318d78a 3241 local->hw.conf.channel->center_freq,
cffdd30d 3242 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3243 if (!bss)
3244 return -ENOMEM;
3245
8318d78a
JB		 3246 bss->band = local->hw.conf.channel->band;
3247 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3248
3249 if (local->hw.conf.beacon_int == 0)
dc0ae30c 3250 local->hw.conf.beacon_int = 100;
f0706e82 3251 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3252 bss->last_update = jiffies;
3253 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 3254
3255 if (sdata->default_key)
f0706e82 3256 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 3257 else
f0706e82 3258 sdata->drop_unencrypted = 0;
988c0f72 3259
8318d78a 3260 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3261 pos = bss->supp_rates;
8318d78a
JB		 3262 for (i = 0; i < sband->n_bitrates; i++) {
3263 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3264 *pos++ = (u8) (rate / 5);
3265 }
3266
f698d856 3267 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 3268 ieee80211_rx_bss_put(local, bss);
167ad6f7 3269 return ret;
f0706e82
JB		 3270}
3271
3272
f698d856 3273static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3274 struct ieee80211_if_sta *ifsta)
3275{
f698d856 3276 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3277 struct ieee80211_sta_bss *bss;
3278 int found = 0;
3279 u8 bssid[ETH_ALEN];
3280 int active_ibss;
0795af57
JP		 3281 DECLARE_MAC_BUF(mac);
3282 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3283
3284 if (ifsta->ssid_len == 0)
3285 return -EINVAL;
3286
f698d856 3287 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 3288#ifdef CONFIG_MAC80211_IBSS_DEBUG
3289 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 3290 sdata->dev->name, active_ibss);
f0706e82
JB		 3291#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3292 spin_lock_bh(&local->sta_bss_lock);
3293 list_for_each_entry(bss, &local->sta_bss_list, list) {
3294 if (ifsta->ssid_len != bss->ssid_len ||
3295 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3296 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3297 continue;
3298#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3299 printk(KERN_DEBUG " bssid=%s found\n",
3300 print_mac(mac, bss->bssid));
f0706e82
JB		 3301#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3302 memcpy(bssid, bss->bssid, ETH_ALEN);
3303 found = 1;
3304 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3305 break;
3306 }
3307 spin_unlock_bh(&local->sta_bss_lock);
3308
3309#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 3310 if (found)
3311 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3312 "%s\n", print_mac(mac, bssid),
3313 print_mac(mac2, ifsta->bssid));
f0706e82 3314#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 3315
3316 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 3317 int ret;
80693ceb
DD		 3318 int search_freq;
3319
3320 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3321 search_freq = bss->freq;
3322 else
3323 search_freq = local->hw.conf.channel->center_freq;
3324
f698d856 3325 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 3326 ifsta->ssid, ifsta->ssid_len);
3327 if (!bss)
3328 goto dont_join;
3329
0795af57 3330 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3331 " based on configured SSID\n",
f698d856
JBG		 3332 sdata->dev->name, print_mac(mac, bssid));
3333 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 3334 ieee80211_rx_bss_put(local, bss);
167ad6f7 3335 return ret;
f0706e82 3336 }
80693ceb
DD		 3337
3338dont_join:
f0706e82
JB		 3339#ifdef CONFIG_MAC80211_IBSS_DEBUG
3340 printk(KERN_DEBUG " did not try to join ibss\n");
3341#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3342
3343 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 3344 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 3345 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 3346 mod_timer(&ifsta->timer, jiffies +
3347 IEEE80211_IBSS_MERGE_INTERVAL);
3348 } else if (time_after(jiffies, local->last_scan_completed +
3349 IEEE80211_SCAN_INTERVAL)) {
3350 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 3351 "join\n", sdata->dev->name);
3352 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 3353 ifsta->ssid_len);
48c2fc59 3354 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 3355 int interval = IEEE80211_SCAN_INTERVAL;
3356
3357 if (time_after(jiffies, ifsta->ibss_join_req +
3358 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3359 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3360 (!(local->oper_channel->flags &
3361 IEEE80211_CHAN_NO_IBSS)))
f698d856 3362 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 3363 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 3364 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 3365 " %d MHz\n", sdata->dev->name,
8318d78a 3366 local->hw.conf.channel->center_freq);
f0706e82
JB		 3367 }
3368
3369 /* No IBSS found - decrease scan interval and continue
3370 * scanning. */
3371 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3372 }
3373
48c2fc59 3374 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 3375 mod_timer(&ifsta->timer, jiffies + interval);
3376 return 0;
3377 }
3378
3379 return 0;
3380}
3381
3382
f698d856 3383int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
f0706e82 3384{
f0706e82 3385 struct ieee80211_if_sta *ifsta;
9d139c81 3386 int res;
f0706e82
JB		 3387
3388 if (len > IEEE80211_MAX_SSID_LEN)
3389 return -EINVAL;
3390
f0706e82
JB		 3391 ifsta = &sdata->u.sta;
3392
9d139c81
JB		 3393 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3394 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3395 memcpy(ifsta->ssid, ssid, len);
3396 ifsta->ssid_len = len;
d6f2da5b 3397 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 3398
3399 res = 0;
3400 /*
3401 * Hack! MLME code needs to be cleaned up to have different
3402 * entry points for configuration and internal selection change
3403 */
3404 if (netif_running(sdata->dev))
3405 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3406 if (res) {
3407 printk(KERN_DEBUG "%s: Failed to config new SSID to "
f698d856 3408 "the low-level driver\n", sdata->dev->name);
9d139c81
JB		 3409 return res;
3410 }
3411 }
f0706e82 3412
d6f2da5b
JS		 3413 if (len)
3414 ifsta->flags |= IEEE80211_STA_SSID_SET;
3415 else
3416 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 3417
51fb61e7 3418 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3419 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82 3420 ifsta->ibss_join_req = jiffies;
48c2fc59 3421 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f698d856 3422 return ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 3423 }
9d139c81 3424
f0706e82
JB		 3425 return 0;
3426}
3427
3428
f698d856 3429int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
f0706e82 3430{
f0706e82
JB		 3431 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3432 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3433 *len = ifsta->ssid_len;
3434 return 0;
3435}
3436
3437
f698d856 3438int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
f0706e82 3439{
f0706e82
JB		 3440 struct ieee80211_if_sta *ifsta;
3441 int res;
3442
f0706e82
JB		 3443 ifsta = &sdata->u.sta;
3444
3445 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3446 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 3447 res = 0;
3448 /*
3449 * Hack! See also ieee80211_sta_set_ssid.
3450 */
3451 if (netif_running(sdata->dev))
3452 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 3453 if (res) {
3454 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
f698d856 3455 "the low-level driver\n", sdata->dev->name);
f0706e82
JB		 3456 return res;
3457 }
3458 }
3459
d6f2da5b
JS		 3460 if (is_valid_ether_addr(bssid))
3461 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3462 else
d6f2da5b
JS		 3463 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3464
f0706e82
JB		 3465 return 0;
3466}
3467
3468
3469static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3470 struct ieee80211_sub_if_data *sdata,
3471 int powersave)
3472{
3473 struct sk_buff *skb;
3474 struct ieee80211_hdr *nullfunc;
4e3996fe 3475 __le16 fc;
f0706e82
JB		 3476
3477 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3478 if (!skb) {
3479 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3480 "frame\n", sdata->dev->name);
3481 return;
3482 }
3483 skb_reserve(skb, local->hw.extra_tx_headroom);
3484
3485 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3486 memset(nullfunc, 0, 24);
4e3996fe
HH		 3487 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3488 IEEE80211_FCTL_TODS);
f0706e82 3489 if (powersave)
4e3996fe
HH		 3490 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3491 nullfunc->frame_control = fc;
f0706e82
JB		 3492 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3493 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3494 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3495
f698d856 3496 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 3497}
3498
3499
69d3b6f4
JB		 3500static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3501{
3502 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3503 ieee80211_vif_is_mesh(&sdata->vif))
3504 ieee80211_sta_timer((unsigned long)sdata);
3505}
3506
f0706e82
JB		 3507void ieee80211_scan_completed(struct ieee80211_hw *hw)
3508{
3509 struct ieee80211_local *local = hw_to_local(hw);
f0706e82
JB		 3510 struct ieee80211_sub_if_data *sdata;
3511 union iwreq_data wrqu;
3512
3513 local->last_scan_completed = jiffies;
ece8eddd 3514 memset(&wrqu, 0, sizeof(wrqu));
491775a5 3515 wireless_send_event(local->scan_sdata->dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3516
ece8eddd
ZY		 3517 if (local->sta_hw_scanning) {
3518 local->sta_hw_scanning = 0;
675ef586
MA		 3519 if (ieee80211_hw_config(local))
3520 printk(KERN_DEBUG "%s: failed to restore operational "
491775a5 3521 "channel after scan\n", wiphy_name(local->hw.wiphy));
69d3b6f4
JB		 3522 /* Restart STA timer for HW scan case */
3523 rcu_read_lock();
3524 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3525 ieee80211_restart_sta_timer(sdata);
3526 rcu_read_unlock();
3527
ece8eddd
ZY		 3528 goto done;
3529 }
3530
3531 local->sta_sw_scanning = 0;
f0706e82 3532 if (ieee80211_hw_config(local))
4b50e388 3533 printk(KERN_DEBUG "%s: failed to restore operational "
491775a5 3534 "channel after scan\n", wiphy_name(local->hw.wiphy));
f0706e82 3535
4150c572
JB		 3536
3537 netif_tx_lock_bh(local->mdev);
e308a5d8 3538 netif_addr_lock(local->mdev);
4150c572
JB		 3539 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3540 local->ops->configure_filter(local_to_hw(local),
3541 FIF_BCN_PRBRESP_PROMISC,
3542 &local->filter_flags,
3543 local->mdev->mc_count,
3544 local->mdev->mc_list);
3545
e308a5d8 3546 netif_addr_unlock(local->mdev);
4150c572 3547 netif_tx_unlock_bh(local->mdev);
f0706e82 3548
79010420
JB		 3549 rcu_read_lock();
3550 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
69d3b6f4 3551 /* Tell AP we're back */
24e64622
TW		 3552 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3553 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) {
3554 ieee80211_send_nullfunc(local, sdata, 0);
3555 netif_tx_wake_all_queues(sdata->dev);
3556 }
3557 } else
3558 netif_tx_wake_all_queues(sdata->dev);
14042cbe 3559
69d3b6f4 3560 ieee80211_restart_sta_timer(sdata);
f0706e82 3561 }
79010420 3562 rcu_read_unlock();
f0706e82 3563
491775a5
JB		 3564 done:
3565 sdata = local->scan_sdata;
51fb61e7 3566 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3567 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3568 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
48c2fc59 3569 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
f698d856
JBG		 3570 !ieee80211_sta_active_ibss(sdata)))
3571 ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82
JB		 3572 }
3573}
3574EXPORT_SYMBOL(ieee80211_scan_completed);
3575
3576void ieee80211_sta_scan_work(struct work_struct *work)
3577{
3578 struct ieee80211_local *local =
3579 container_of(work, struct ieee80211_local, scan_work.work);
491775a5 3580 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
8318d78a 3581 struct ieee80211_supported_band *sband;
f0706e82
JB		 3582 struct ieee80211_channel *chan;
3583 int skip;
3584 unsigned long next_delay = 0;
3585
ece8eddd 3586 if (!local->sta_sw_scanning)
f0706e82
JB		 3587 return;
3588
3589 switch (local->scan_state) {
3590 case SCAN_SET_CHANNEL:
69d464d5
JB		 3591 /*
3592 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3593 * after we successfully scanned the last channel of the last
3594 * band (and the last band is supported by the hw)
3595 */
8318d78a
JB		 3596 if (local->scan_band < IEEE80211_NUM_BANDS)
3597 sband = local->hw.wiphy->bands[local->scan_band];
3598 else
3599 sband = NULL;
3600
69d464d5
JB		 3601 /*
3602 * If we are at an unsupported band and have more bands
3603 * left to scan, advance to the next supported one.
3604 */
3605 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3606 local->scan_band++;
3607 sband = local->hw.wiphy->bands[local->scan_band];
3608 local->scan_channel_idx = 0;
3609 }
3610
69d464d5
JB		 3611 /* if no more bands/channels left, complete scan */
3612 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3613 ieee80211_scan_completed(local_to_hw(local));
3614 return;
3615 }
8318d78a
JB		 3616 skip = 0;
3617 chan = &sband->channels[local->scan_channel_idx];
3618
3619 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3620 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3621 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3622 skip = 1;
3623
3624 if (!skip) {
f0706e82
JB		 3625 local->scan_channel = chan;
3626 if (ieee80211_hw_config(local)) {
8318d78a 3627 printk(KERN_DEBUG "%s: failed to set freq to "
491775a5 3628 "%d MHz for scan\n", wiphy_name(local->hw.wiphy),
8318d78a 3629 chan->center_freq);
f0706e82
JB		 3630 skip = 1;
3631 }
3632 }
3633
69d464d5 3634 /* advance state machine to next channel/band */
f0706e82 3635 local->scan_channel_idx++;
8318d78a 3636 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3637 /*
3638 * scan_band may end up == IEEE80211_NUM_BANDS, but
3639 * we'll catch that case above and complete the scan
3640 * if that is the case.
3641 */
8318d78a
JB		 3642 local->scan_band++;
3643 local->scan_channel_idx = 0;
f0706e82
JB		 3644 }
3645
3646 if (skip)
3647 break;
3648
3649 next_delay = IEEE80211_PROBE_DELAY +
3650 usecs_to_jiffies(local->hw.channel_change_time);
3651 local->scan_state = SCAN_SEND_PROBE;
3652 break;
3653 case SCAN_SEND_PROBE:
8318d78a 3654 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3655 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3656
3657 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3658 break;
f698d856 3659 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
8318d78a
JB		 3660 local->scan_ssid_len);
3661 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3662 break;
3663 }
3664
ece8eddd 3665 if (local->sta_sw_scanning)
f0706e82
JB		 3666 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3667 next_delay);
3668}
3669
3670
f698d856 3671static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
f0706e82
JB		 3672 u8 *ssid, size_t ssid_len)
3673{
f698d856 3674 struct ieee80211_local *local = scan_sdata->local;
f0706e82
JB		 3675 struct ieee80211_sub_if_data *sdata;
3676
3677 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3678 return -EINVAL;
3679
3680 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3681 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3682 * BSSID: MACAddress
3683 * SSID
3684 * ScanType: ACTIVE, PASSIVE
3685 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3686 * a Probe frame during active scanning
3687 * ChannelList
3688 * MinChannelTime (>= ProbeDelay), in TU
3689 * MaxChannelTime: (>= MinChannelTime), in TU
3690 */
3691
3692 /* MLME-SCAN.confirm
3693 * BSSDescriptionSet
3694 * ResultCode: SUCCESS, INVALID_PARAMETERS
3695 */
3696
ece8eddd 3697 if (local->sta_sw_scanning || local->sta_hw_scanning) {
491775a5 3698 if (local->scan_sdata == scan_sdata)
f0706e82
JB		 3699 return 0;
3700 return -EBUSY;
3701 }
3702
3703 if (local->ops->hw_scan) {
3704 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3705 ssid, ssid_len);
f0706e82 3706 if (!rc) {
ece8eddd 3707 local->sta_hw_scanning = 1;
491775a5 3708 local->scan_sdata = scan_sdata;
f0706e82
JB		 3709 }
3710 return rc;
3711 }
3712
ece8eddd 3713 local->sta_sw_scanning = 1;
f0706e82 3714
79010420
JB		 3715 rcu_read_lock();
3716 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
24e64622
TW		 3717 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3718 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) {
3719 netif_tx_stop_all_queues(sdata->dev);
3720 ieee80211_send_nullfunc(local, sdata, 1);
3721 }
3722 } else
3723 netif_tx_stop_all_queues(sdata->dev);
f0706e82 3724 }
79010420 3725 rcu_read_unlock();
f0706e82
JB		 3726
3727 if (ssid) {
3728 local->scan_ssid_len = ssid_len;
3729 memcpy(local->scan_ssid, ssid, ssid_len);
3730 } else
3731 local->scan_ssid_len = 0;
3732 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3733 local->scan_channel_idx = 0;
8318d78a 3734 local->scan_band = IEEE80211_BAND_2GHZ;
491775a5 3735 local->scan_sdata = scan_sdata;
f0706e82 3736
b9e40857 3737 netif_addr_lock_bh(local->mdev);
4150c572
JB		 3738 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3739 local->ops->configure_filter(local_to_hw(local),
3740 FIF_BCN_PRBRESP_PROMISC,
3741 &local->filter_flags,
3742 local->mdev->mc_count,
3743 local->mdev->mc_list);
b9e40857 3744 netif_addr_unlock_bh(local->mdev);
f0706e82
JB		 3745
3746 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3747 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3748 IEEE80211_CHANNEL_TIME);
3749
3750 return 0;
3751}
3752
3753
f698d856 3754int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
f0706e82 3755{
f0706e82 3756 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 3757 struct ieee80211_local *local = sdata->local;
f0706e82 3758
51fb61e7 3759 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f698d856 3760 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
f0706e82 3761
ece8eddd 3762 if (local->sta_sw_scanning || local->sta_hw_scanning) {
491775a5 3763 if (local->scan_sdata == sdata)
f0706e82
JB		 3764 return 0;
3765 return -EBUSY;
3766 }
3767
a0af5f14
HS		 3768 ifsta->scan_ssid_len = ssid_len;
3769 if (ssid_len)
3770 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3771 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3772 queue_work(local->hw.workqueue, &ifsta->work);
3773 return 0;
3774}
3775
43ac2ca3
JM		 3776
3777static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
3778 struct ieee80211_sta_bss *bss,
3779 char **current_ev, char *end_buf)
3780{
3781 u8 *pos, *end, *next;
3782 struct iw_event iwe;
3783
3784 if (bss == NULL || bss->ies == NULL)
3785 return;
3786
3787 /*
3788 * If needed, fragment the IEs buffer (at IE boundaries) into short
3789 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
3790 */
3791 pos = bss->ies;
3792 end = pos + bss->ies_len;
3793
3794 while (end - pos > IW_GENERIC_IE_MAX) {
3795 next = pos + 2 + pos[1];
3796 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
3797 next = next + 2 + next[1];
3798
3799 memset(&iwe, 0, sizeof(iwe));
3800 iwe.cmd = IWEVGENIE;
3801 iwe.u.data.length = next - pos;
3802 *current_ev = iwe_stream_add_point(info, *current_ev,
3803 end_buf, &iwe, pos);
3804
3805 pos = next;
3806 }
3807
3808 if (end > pos) {
3809 memset(&iwe, 0, sizeof(iwe));
3810 iwe.cmd = IWEVGENIE;
3811 iwe.u.data.length = end - pos;
3812 *current_ev = iwe_stream_add_point(info, *current_ev,
3813 end_buf, &iwe, pos);
3814 }
3815}
3816
3817
f0706e82 3818static char *
f698d856 3819ieee80211_sta_scan_result(struct ieee80211_local *local,
ccc58057 3820 struct iw_request_info *info,
f0706e82
JB		 3821 struct ieee80211_sta_bss *bss,
3822 char *current_ev, char *end_buf)
3823{
f0706e82 3824 struct iw_event iwe;
ee96d6ef 3825 char *buf;
f0706e82
JB		 3826
3827 if (time_after(jiffies,
3828 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3829 return current_ev;
3830
f0706e82
JB		 3831 memset(&iwe, 0, sizeof(iwe));
3832 iwe.cmd = SIOCGIWAP;
3833 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3834 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
ccc58057 3835 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82
JB		 3836 IW_EV_ADDR_LEN);
3837
3838 memset(&iwe, 0, sizeof(iwe));
3839 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 3840 if (bss_mesh_cfg(bss)) {
3841 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69 3842 iwe.u.data.flags = 1;
ccc58057
DM		 3843 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
3844 &iwe, bss_mesh_id(bss));
f709fc69
LCC		 3845 } else {
3846 iwe.u.data.length = bss->ssid_len;
3847 iwe.u.data.flags = 1;
ccc58057
DM		 3848 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
3849 &iwe, bss->ssid);
f709fc69 3850 }
f0706e82 3851
1d1b5359
LCC		 3852 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3853 || bss_mesh_cfg(bss)) {
f0706e82
JB		 3854 memset(&iwe, 0, sizeof(iwe));
3855 iwe.cmd = SIOCGIWMODE;
902acc78 3856 if (bss_mesh_cfg(bss))
f709fc69
LCC		 3857 iwe.u.mode = IW_MODE_MESH;
3858 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 3859 iwe.u.mode = IW_MODE_MASTER;
3860 else
3861 iwe.u.mode = IW_MODE_ADHOC;
ccc58057
DM		 3862 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
3863 &iwe, IW_EV_UINT_LEN);
f0706e82
JB		 3864 }
3865
3866 memset(&iwe, 0, sizeof(iwe));
3867 iwe.cmd = SIOCGIWFREQ;
9381be05
TW		 3868 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3869 iwe.u.freq.e = 0;
ccc58057 3870 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82 3871 IW_EV_FREQ_LEN);
8318d78a
JB		 3872
3873 memset(&iwe, 0, sizeof(iwe));
3874 iwe.cmd = SIOCGIWFREQ;
9381be05
TW		 3875 iwe.u.freq.m = bss->freq;
3876 iwe.u.freq.e = 6;
ccc58057 3877 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82 3878 IW_EV_FREQ_LEN);
f0706e82
JB		 3879 memset(&iwe, 0, sizeof(iwe));
3880 iwe.cmd = IWEVQUAL;
566bfe5a
BR		 3881 iwe.u.qual.qual = bss->qual;
3882 iwe.u.qual.level = bss->signal;
f0706e82
JB		 3883 iwe.u.qual.noise = bss->noise;
3884 iwe.u.qual.updated = local->wstats_flags;
ccc58057 3885 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82
JB		 3886 IW_EV_QUAL_LEN);
3887
3888 memset(&iwe, 0, sizeof(iwe));
3889 iwe.cmd = SIOCGIWENCODE;
3890 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3891 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3892 else
3893 iwe.u.data.flags = IW_ENCODE_DISABLED;
3894 iwe.u.data.length = 0;
ccc58057
DM		 3895 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
3896 &iwe, "");
f0706e82 3897
43ac2ca3 3898 ieee80211_sta_add_scan_ies(info, bss, &current_ev, end_buf);
e623157b 3899
ee96d6ef 3900 if (bss->supp_rates_len > 0) {
f0706e82 3901 /* display all supported rates in readable format */
ccc58057 3902 char *p = current_ev + iwe_stream_lcp_len(info);
f0706e82
JB		 3903 int i;
3904
3905 memset(&iwe, 0, sizeof(iwe));
3906 iwe.cmd = SIOCGIWRATE;
3907 /* Those two flags are ignored... */
3908 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3909
3910 for (i = 0; i < bss->supp_rates_len; i++) {
3911 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3912 0x7f) * 500000);
ccc58057 3913 p = iwe_stream_add_value(info, current_ev, p,
f0706e82
JB		 3914 end_buf, &iwe, IW_EV_PARAM_LEN);
3915 }
3916 current_ev = p;
3917 }
3918
ee96d6ef
JB		 3919 buf = kmalloc(30, GFP_ATOMIC);
3920 if (buf) {
3921 memset(&iwe, 0, sizeof(iwe));
3922 iwe.cmd = IWEVCUSTOM;
3923 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3924 iwe.u.data.length = strlen(buf);
3925 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
3926 &iwe, buf);
3927 memset(&iwe, 0, sizeof(iwe));
3928 iwe.cmd = IWEVCUSTOM;
3929 sprintf(buf, " Last beacon: %dms ago",
3930 jiffies_to_msecs(jiffies - bss->last_update));
3931 iwe.u.data.length = strlen(buf);
3932 current_ev = iwe_stream_add_point(info, current_ev,
3933 end_buf, &iwe, buf);
3934 kfree(buf);
f0706e82
JB		 3935 }
3936
902acc78 3937 if (bss_mesh_cfg(bss)) {
24736701 3938 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 3939 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 3940 if (buf) {
3941 memset(&iwe, 0, sizeof(iwe));
3942 iwe.cmd = IWEVCUSTOM;
24736701 3943 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4f5d4c4d 3944 iwe.u.data.length = strlen(buf);
ccc58057
DM		 3945 current_ev = iwe_stream_add_point(info, current_ev,
3946 end_buf,
4f5d4c4d
LCC		 3947 &iwe, buf);
3948 sprintf(buf, "Path Selection Protocol ID: "
24736701
JL		 3949 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
3950 cfg[4]);
4f5d4c4d 3951 iwe.u.data.length = strlen(buf);
ccc58057
DM		 3952 current_ev = iwe_stream_add_point(info, current_ev,
3953 end_buf,
4f5d4c4d
LCC		 3954 &iwe, buf);
3955 sprintf(buf, "Path Selection Metric ID: "
24736701
JL		 3956 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
3957 cfg[8]);
4f5d4c4d 3958 iwe.u.data.length = strlen(buf);
ccc58057
DM		 3959 current_ev = iwe_stream_add_point(info, current_ev,
3960 end_buf,
4f5d4c4d
LCC		 3961 &iwe, buf);
3962 sprintf(buf, "Congestion Control Mode ID: "
24736701
JL		 3963 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
3964 cfg[11], cfg[12]);
4f5d4c4d 3965 iwe.u.data.length = strlen(buf);
ccc58057
DM		 3966 current_ev = iwe_stream_add_point(info, current_ev,
3967 end_buf,
4f5d4c4d
LCC		 3968 &iwe, buf);
3969 sprintf(buf, "Channel Precedence: "
24736701
JL		 3970 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
3971 cfg[15], cfg[16]);
f709fc69 3972 iwe.u.data.length = strlen(buf);
ccc58057
DM		 3973 current_ev = iwe_stream_add_point(info, current_ev,
3974 end_buf,
f709fc69
LCC		 3975 &iwe, buf);
3976 kfree(buf);
3977 }
3978 }
3979
f0706e82
JB		 3980 return current_ev;
3981}
3982
3983
f698d856 3984int ieee80211_sta_scan_results(struct ieee80211_local *local,
ccc58057
DM		 3985 struct iw_request_info *info,
3986 char *buf, size_t len)
f0706e82 3987{
f0706e82
JB		 3988 char *current_ev = buf;
3989 char *end_buf = buf + len;
3990 struct ieee80211_sta_bss *bss;
3991
3992 spin_lock_bh(&local->sta_bss_lock);
3993 list_for_each_entry(bss, &local->sta_bss_list, list) {
3994 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3995 spin_unlock_bh(&local->sta_bss_lock);
3996 return -E2BIG;
3997 }
f698d856 3998 current_ev = ieee80211_sta_scan_result(local, info, bss,
ccc58057 3999 current_ev, end_buf);
f0706e82
JB		 4000 }
4001 spin_unlock_bh(&local->sta_bss_lock);
4002 return current_ev - buf;
4003}
4004
4005
f698d856 4006int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
f0706e82 4007{
f0706e82 4008 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 4009
f0706e82
JB		 4010 kfree(ifsta->extra_ie);
4011 if (len == 0) {
4012 ifsta->extra_ie = NULL;
4013 ifsta->extra_ie_len = 0;
4014 return 0;
4015 }
4016 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4017 if (!ifsta->extra_ie) {
4018 ifsta->extra_ie_len = 0;
4019 return -ENOMEM;
4020 }
4021 memcpy(ifsta->extra_ie, ie, len);
4022 ifsta->extra_ie_len = len;
4023 return 0;
4024}
4025
4026
f698d856 4027struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 4028 struct sk_buff *skb, u8 *bssid,
87291c02 4029 u8 *addr, u64 supp_rates)
f0706e82 4030{
f698d856 4031 struct ieee80211_local *local = sdata->local;
f0706e82 4032 struct sta_info *sta;
0795af57 4033 DECLARE_MAC_BUF(mac);
87291c02 4034 int band = local->hw.conf.channel->band;
f0706e82
JB		 4035
4036 /* TODO: Could consider removing the least recently used entry and
4037 * allow new one to be added. */
4038 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4039 if (net_ratelimit()) {
4040 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 4041 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 4042 }
4043 return NULL;
4044 }
4045
1e188637 4046 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 4047 return NULL;
4048
f4ea83dd 4049#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 4050 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 4051 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 4052#endif
f0706e82 4053
73651ee6
JB		 4054 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4055 if (!sta)
f0706e82
JB		 4056 return NULL;
4057
07346f81 4058 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 4059
8e1535d5
EG		 4060 /* make sure mandatory rates are always added */
4061 sta->supp_rates[band] = supp_rates |
4062 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 4063
4064 rate_control_rate_init(sta, local);
4065
93e5deb1 4066 if (sta_info_insert(sta))
73651ee6 4067 return NULL;
73651ee6 4068
d0709a65 4069 return sta;
f0706e82
JB		 4070}
4071
4072
60f8b39c
JB		 4073static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
4074 struct ieee80211_if_sta *ifsta)
4075{
4076 struct ieee80211_local *local = sdata->local;
4077 struct ieee80211_sta_bss *bss, *selected = NULL;
4078 int top_rssi = 0, freq;
4079
4080 spin_lock_bh(&local->sta_bss_lock);
4081 freq = local->oper_channel->center_freq;
4082 list_for_each_entry(bss, &local->sta_bss_list, list) {
4083 if (!(bss->capability & WLAN_CAPABILITY_ESS))
4084 continue;
4085
4086 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
4087 IEEE80211_STA_AUTO_BSSID_SEL |
4088 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
4089 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
4090 !!sdata->default_key))
4091 continue;
4092
4093 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
4094 bss->freq != freq)
4095 continue;
4096
4097 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
4098 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
4099 continue;
4100
4101 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
4102 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
4103 continue;
4104
4105 if (!selected || top_rssi < bss->signal) {
4106 selected = bss;
4107 top_rssi = bss->signal;
4108 }
4109 }
4110 if (selected)
4111 atomic_inc(&selected->users);
4112 spin_unlock_bh(&local->sta_bss_lock);
4113
4114 if (selected) {
4115 ieee80211_set_freq(sdata, selected->freq);
4116 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
4117 ieee80211_sta_set_ssid(sdata, selected->ssid,
4118 selected->ssid_len);
4119 ieee80211_sta_set_bssid(sdata, selected->bssid);
4120 ieee80211_sta_def_wmm_params(sdata, selected, 0);
4121
4122 /* Send out direct probe if no probe resp was received or
4123 * the one we have is outdated
4124 */
4125 if (!selected->last_probe_resp ||
4126 time_after(jiffies, selected->last_probe_resp
4127 + IEEE80211_SCAN_RESULT_EXPIRE))
4128 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
4129 else
4130 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
4131
4132 ieee80211_rx_bss_put(local, selected);
4133 ieee80211_sta_reset_auth(sdata, ifsta);
4134 return 0;
4135 } else {
4136 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
4137 ifsta->assoc_scan_tries++;
4138 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
4139 ieee80211_sta_start_scan(sdata, NULL, 0);
4140 else
4141 ieee80211_sta_start_scan(sdata, ifsta->ssid,
4142 ifsta->ssid_len);
4143 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
4144 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
4145 } else
4146 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4147 }
4148 return -1;
4149}
4150
4151
f698d856 4152int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 4153{
f0706e82
JB		 4154 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4155
f4ea83dd 4156 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 4157 sdata->dev->name, reason);
f0706e82 4158
51fb61e7
JB		 4159 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4160 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4161 return -EINVAL;
4162
aa458d17 4163 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 4164 return 0;
4165}
4166
4167
f698d856 4168int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 4169{
f0706e82
JB		 4170 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4171
f4ea83dd 4172 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 4173 sdata->dev->name, reason);
f0706e82 4174
51fb61e7 4175 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4176 return -EINVAL;
4177
d6f2da5b 4178 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4179 return -1;
4180
aa458d17 4181 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 4182 return 0;
4183}
84363e6e
MA		 4184
4185void ieee80211_notify_mac(struct ieee80211_hw *hw,
4186 enum ieee80211_notification_types notif_type)
4187{
4188 struct ieee80211_local *local = hw_to_local(hw);
4189 struct ieee80211_sub_if_data *sdata;
4190
4191 switch (notif_type) {
4192 case IEEE80211_NOTIFY_RE_ASSOC:
4193 rcu_read_lock();
4194 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 4195 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4196 continue;
84363e6e 4197
f698d856 4198 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 4199 }
4200 rcu_read_unlock();
4201 break;
4202 }
4203}
4204EXPORT_SYMBOL(ieee80211_notify_mac);
60f8b39c
JB		 4205
4206void ieee80211_sta_work(struct work_struct *work)
4207{
4208 struct ieee80211_sub_if_data *sdata =
4209 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
4210 struct ieee80211_local *local = sdata->local;
4211 struct ieee80211_if_sta *ifsta;
4212 struct sk_buff *skb;
4213
4214 if (!netif_running(sdata->dev))
4215 return;
4216
4217 if (local->sta_sw_scanning || local->sta_hw_scanning)
4218 return;
4219
4220 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4221 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
4222 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
4223 return;
4224 ifsta = &sdata->u.sta;
4225
4226 while ((skb = skb_dequeue(&ifsta->skb_queue)))
4227 ieee80211_sta_rx_queued_mgmt(sdata, skb);
4228
4229#ifdef CONFIG_MAC80211_MESH
4230 if (ifsta->preq_queue_len &&
4231 time_after(jiffies,
4232 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
4233 mesh_path_start_discovery(sdata);
4234#endif
4235
4236 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
4237 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
4238 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
4239 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
4240 if (ifsta->scan_ssid_len)
4241 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
4242 else
4243 ieee80211_sta_start_scan(sdata, NULL, 0);
4244 return;
4245 }
4246
4247 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
4248 if (ieee80211_sta_config_auth(sdata, ifsta))
4249 return;
4250 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
4251 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
4252 return;
4253
4254 switch (ifsta->state) {
4255 case IEEE80211_STA_MLME_DISABLED:
4256 break;
4257 case IEEE80211_STA_MLME_DIRECT_PROBE:
4258 ieee80211_direct_probe(sdata, ifsta);
4259 break;
4260 case IEEE80211_STA_MLME_AUTHENTICATE:
4261 ieee80211_authenticate(sdata, ifsta);
4262 break;
4263 case IEEE80211_STA_MLME_ASSOCIATE:
4264 ieee80211_associate(sdata, ifsta);
4265 break;
4266 case IEEE80211_STA_MLME_ASSOCIATED:
4267 ieee80211_associated(sdata, ifsta);
4268 break;
4269 case IEEE80211_STA_MLME_IBSS_SEARCH:
4270 ieee80211_sta_find_ibss(sdata, ifsta);
4271 break;
4272 case IEEE80211_STA_MLME_IBSS_JOINED:
4273 ieee80211_sta_merge_ibss(sdata, ifsta);
4274 break;
4275#ifdef CONFIG_MAC80211_MESH
4276 case IEEE80211_STA_MLME_MESH_UP:
4277 ieee80211_mesh_housekeeping(sdata, ifsta);
4278 break;
4279#endif
4280 default:
4281 WARN_ON(1);
4282 break;
4283 }
4284
4285 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
4286 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
4287 "mixed-cell disabled - disassociate\n", sdata->dev->name);
4288
4289 ieee80211_set_disassoc(sdata, ifsta, false, true,
4290 WLAN_REASON_UNSPECIFIED);
4291 }
4292}
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