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mac80211: move BSS handling to scan code
[linux-2.6/btrfs-unstable.git] / net / mac80211 / mlme.c
blobbe3292bfabe3b2e117b0ed88e0729e0d5cc89713
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 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/netdevice.h>
18 #include <linux/if_arp.h>
19 #include <linux/wireless.h>
20 #include <linux/random.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/iw_handler.h>
24 #include <net/mac80211.h>
25
26 #include "ieee80211_i.h"
27 #include "rate.h"
28 #include "led.h"
29 #include "mesh.h"
30
31 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33 #define IEEE80211_AUTH_MAX_TRIES 3
34 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35 #define IEEE80211_ASSOC_MAX_TRIES 3
36 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
38 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
39 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
41 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
42 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
43
44 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
45 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
46 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
47
48 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49
50
51 /* mgmt header + 1 byte category code */
52 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
53
54 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
55 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
56 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
57 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
58 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
59
60 /* next values represent the buffer size for A-MPDU frame.
61 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
62 #define IEEE80211_MIN_AMPDU_BUF 0x8
63 #define IEEE80211_MAX_AMPDU_BUF 0x40
64
65 /* utils */
66 static int ecw2cw(int ecw)
67 {
68 return (1 << ecw) - 1;
69 }
70
71 static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
72 {
73 u8 *end, *pos;
74
75 pos = bss->ies;
76 if (pos == NULL)
77 return NULL;
78 end = pos + bss->ies_len;
79
80 while (pos + 1 < end) {
81 if (pos + 2 + pos[1] > end)
82 break;
83 if (pos[0] == ie)
84 return pos;
85 pos += 2 + pos[1];
86 }
87
88 return NULL;
89 }
90
91 /* frame sending functions */
92 void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
93 int encrypt)
94 {
95 skb->dev = sdata->local->mdev;
96 skb_set_mac_header(skb, 0);
97 skb_set_network_header(skb, 0);
98 skb_set_transport_header(skb, 0);
99
100 skb->iif = sdata->dev->ifindex;
101 skb->do_not_encrypt = !encrypt;
102
103 dev_queue_xmit(skb);
104 }
105
106 static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
107 struct ieee80211_if_sta *ifsta,
108 int transaction, u8 *extra, size_t extra_len,
109 int encrypt)
110 {
111 struct ieee80211_local *local = sdata->local;
112 struct sk_buff *skb;
113 struct ieee80211_mgmt *mgmt;
114
115 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
116 sizeof(*mgmt) + 6 + extra_len);
117 if (!skb) {
118 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
119 "frame\n", sdata->dev->name);
120 return;
121 }
122 skb_reserve(skb, local->hw.extra_tx_headroom);
123
124 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
125 memset(mgmt, 0, 24 + 6);
126 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
127 IEEE80211_STYPE_AUTH);
128 if (encrypt)
129 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
130 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
131 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
132 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
133 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
134 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
135 ifsta->auth_transaction = transaction + 1;
136 mgmt->u.auth.status_code = cpu_to_le16(0);
137 if (extra)
138 memcpy(skb_put(skb, extra_len), extra, extra_len);
139
140 ieee80211_sta_tx(sdata, skb, encrypt);
141 }
142
143 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
144 u8 *ssid, size_t ssid_len)
145 {
146 struct ieee80211_local *local = sdata->local;
147 struct ieee80211_supported_band *sband;
148 struct sk_buff *skb;
149 struct ieee80211_mgmt *mgmt;
150 u8 *pos, *supp_rates, *esupp_rates = NULL;
151 int i;
152
153 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
154 if (!skb) {
155 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
156 "request\n", sdata->dev->name);
157 return;
158 }
159 skb_reserve(skb, local->hw.extra_tx_headroom);
160
161 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
162 memset(mgmt, 0, 24);
163 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
164 IEEE80211_STYPE_PROBE_REQ);
165 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
166 if (dst) {
167 memcpy(mgmt->da, dst, ETH_ALEN);
168 memcpy(mgmt->bssid, dst, ETH_ALEN);
169 } else {
170 memset(mgmt->da, 0xff, ETH_ALEN);
171 memset(mgmt->bssid, 0xff, ETH_ALEN);
172 }
173 pos = skb_put(skb, 2 + ssid_len);
174 *pos++ = WLAN_EID_SSID;
175 *pos++ = ssid_len;
176 memcpy(pos, ssid, ssid_len);
177
178 supp_rates = skb_put(skb, 2);
179 supp_rates[0] = WLAN_EID_SUPP_RATES;
180 supp_rates[1] = 0;
181 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
182
183 for (i = 0; i < sband->n_bitrates; i++) {
184 struct ieee80211_rate *rate = &sband->bitrates[i];
185 if (esupp_rates) {
186 pos = skb_put(skb, 1);
187 esupp_rates[1]++;
188 } else if (supp_rates[1] == 8) {
189 esupp_rates = skb_put(skb, 3);
190 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
191 esupp_rates[1] = 1;
192 pos = &esupp_rates[2];
193 } else {
194 pos = skb_put(skb, 1);
195 supp_rates[1]++;
196 }
197 *pos = rate->bitrate / 5;
198 }
199
200 ieee80211_sta_tx(sdata, skb, 0);
201 }
202
203 /* MLME */
204 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
205 struct ieee80211_sta_bss *bss,
206 int ibss)
207 {
208 struct ieee80211_local *local = sdata->local;
209 int i, have_higher_than_11mbit = 0;
210
211
212 /* cf. IEEE 802.11 9.2.12 */
213 for (i = 0; i < bss->supp_rates_len; i++)
214 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
215 have_higher_than_11mbit = 1;
216
217 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
218 have_higher_than_11mbit)
219 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
220 else
221 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
222
223
224 if (local->ops->conf_tx) {
225 struct ieee80211_tx_queue_params qparam;
226
227 memset(&qparam, 0, sizeof(qparam));
228
229 qparam.aifs = 2;
230
231 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
232 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
233 qparam.cw_min = 31;
234 else
235 qparam.cw_min = 15;
236
237 qparam.cw_max = 1023;
238 qparam.txop = 0;
239
240 for (i = 0; i < local_to_hw(local)->queues; i++)
241 local->ops->conf_tx(local_to_hw(local), i, &qparam);
242 }
243 }
244
245 static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
246 struct ieee80211_if_sta *ifsta,
247 u8 *wmm_param, size_t wmm_param_len)
248 {
249 struct ieee80211_tx_queue_params params;
250 size_t left;
251 int count;
252 u8 *pos;
253
254 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
255 return;
256
257 if (!wmm_param)
258 return;
259
260 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
261 return;
262 count = wmm_param[6] & 0x0f;
263 if (count == ifsta->wmm_last_param_set)
264 return;
265 ifsta->wmm_last_param_set = count;
266
267 pos = wmm_param + 8;
268 left = wmm_param_len - 8;
269
270 memset(&params, 0, sizeof(params));
271
272 if (!local->ops->conf_tx)
273 return;
274
275 local->wmm_acm = 0;
276 for (; left >= 4; left -= 4, pos += 4) {
277 int aci = (pos[0] >> 5) & 0x03;
278 int acm = (pos[0] >> 4) & 0x01;
279 int queue;
280
281 switch (aci) {
282 case 1:
283 queue = 3;
284 if (acm)
285 local->wmm_acm |= BIT(0) | BIT(3);
286 break;
287 case 2:
288 queue = 1;
289 if (acm)
290 local->wmm_acm |= BIT(4) | BIT(5);
291 break;
292 case 3:
293 queue = 0;
294 if (acm)
295 local->wmm_acm |= BIT(6) | BIT(7);
296 break;
297 case 0:
298 default:
299 queue = 2;
300 if (acm)
301 local->wmm_acm |= BIT(1) | BIT(2);
302 break;
303 }
304
305 params.aifs = pos[0] & 0x0f;
306 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
307 params.cw_min = ecw2cw(pos[1] & 0x0f);
308 params.txop = get_unaligned_le16(pos + 2);
309 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
310 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
311 "cWmin=%d cWmax=%d txop=%d\n",
312 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
313 params.cw_max, params.txop);
314 #endif
315 /* TODO: handle ACM (block TX, fallback to next lowest allowed
316 * AC for now) */
317 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
318 printk(KERN_DEBUG "%s: failed to set TX queue "
319 "parameters for queue %d\n", local->mdev->name, queue);
320 }
321 }
322 }
323
324 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
325 bool use_protection,
326 bool use_short_preamble)
327 {
328 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
329 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
330 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
331 DECLARE_MAC_BUF(mac);
332 #endif
333 u32 changed = 0;
334
335 if (use_protection != bss_conf->use_cts_prot) {
336 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
337 if (net_ratelimit()) {
338 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
339 "%s)\n",
340 sdata->dev->name,
341 use_protection ? "enabled" : "disabled",
342 print_mac(mac, ifsta->bssid));
343 }
344 #endif
345 bss_conf->use_cts_prot = use_protection;
346 changed |= BSS_CHANGED_ERP_CTS_PROT;
347 }
348
349 if (use_short_preamble != bss_conf->use_short_preamble) {
350 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
351 if (net_ratelimit()) {
352 printk(KERN_DEBUG "%s: switched to %s barker preamble"
353 " (BSSID=%s)\n",
354 sdata->dev->name,
355 use_short_preamble ? "short" : "long",
356 print_mac(mac, ifsta->bssid));
357 }
358 #endif
359 bss_conf->use_short_preamble = use_short_preamble;
360 changed |= BSS_CHANGED_ERP_PREAMBLE;
361 }
362
363 return changed;
364 }
365
366 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
367 u8 erp_value)
368 {
369 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
370 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
371
372 return ieee80211_handle_protect_preamb(sdata,
373 use_protection, use_short_preamble);
374 }
375
376 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
377 struct ieee80211_sta_bss *bss)
378 {
379 u32 changed = 0;
380
381 if (bss->has_erp_value)
382 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
383 else {
384 u16 capab = bss->capability;
385 changed |= ieee80211_handle_protect_preamb(sdata, false,
386 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
387 }
388
389 return changed;
390 }
391
392 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
393 struct ieee80211_ht_info *ht_info)
394 {
395
396 if (ht_info == NULL)
397 return -EINVAL;
398
399 memset(ht_info, 0, sizeof(*ht_info));
400
401 if (ht_cap_ie) {
402 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
403
404 ht_info->ht_supported = 1;
405 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
406 ht_info->ampdu_factor =
407 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
408 ht_info->ampdu_density =
409 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
410 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
411 } else
412 ht_info->ht_supported = 0;
413
414 return 0;
415 }
416
417 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
418 struct ieee80211_ht_addt_info *ht_add_info_ie,
419 struct ieee80211_ht_bss_info *bss_info)
420 {
421 if (bss_info == NULL)
422 return -EINVAL;
423
424 memset(bss_info, 0, sizeof(*bss_info));
425
426 if (ht_add_info_ie) {
427 u16 op_mode;
428 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
429
430 bss_info->primary_channel = ht_add_info_ie->control_chan;
431 bss_info->bss_cap = ht_add_info_ie->ht_param;
432 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
433 }
434
435 return 0;
436 }
437
438 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
439 struct ieee80211_if_sta *ifsta)
440 {
441 union iwreq_data wrqu;
442 memset(&wrqu, 0, sizeof(wrqu));
443 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
444 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
445 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
446 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
447 }
448
449 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
450 struct ieee80211_if_sta *ifsta)
451 {
452 union iwreq_data wrqu;
453
454 if (ifsta->assocreq_ies) {
455 memset(&wrqu, 0, sizeof(wrqu));
456 wrqu.data.length = ifsta->assocreq_ies_len;
457 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
458 ifsta->assocreq_ies);
459 }
460 if (ifsta->assocresp_ies) {
461 memset(&wrqu, 0, sizeof(wrqu));
462 wrqu.data.length = ifsta->assocresp_ies_len;
463 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
464 ifsta->assocresp_ies);
465 }
466 }
467
468
469 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
470 struct ieee80211_if_sta *ifsta)
471 {
472 struct ieee80211_local *local = sdata->local;
473 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
474 u32 changed = BSS_CHANGED_ASSOC;
475
476 struct ieee80211_sta_bss *bss;
477
478 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
479
480 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
481 return;
482
483 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
484 conf->channel->center_freq,
485 ifsta->ssid, ifsta->ssid_len);
486 if (bss) {
487 /* set timing information */
488 sdata->bss_conf.beacon_int = bss->beacon_int;
489 sdata->bss_conf.timestamp = bss->timestamp;
490 sdata->bss_conf.dtim_period = bss->dtim_period;
491
492 changed |= ieee80211_handle_bss_capability(sdata, bss);
493
494 ieee80211_rx_bss_put(local, bss);
495 }
496
497 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
498 changed |= BSS_CHANGED_HT;
499 sdata->bss_conf.assoc_ht = 1;
500 sdata->bss_conf.ht_conf = &conf->ht_conf;
501 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
502 }
503
504 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
505 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
506 ieee80211_sta_send_associnfo(sdata, ifsta);
507
508 ifsta->last_probe = jiffies;
509 ieee80211_led_assoc(local, 1);
510
511 sdata->bss_conf.assoc = 1;
512 ieee80211_bss_info_change_notify(sdata, changed);
513
514 netif_tx_start_all_queues(sdata->dev);
515 netif_carrier_on(sdata->dev);
516
517 ieee80211_sta_send_apinfo(sdata, ifsta);
518 }
519
520 static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
521 struct ieee80211_if_sta *ifsta)
522 {
523 DECLARE_MAC_BUF(mac);
524
525 ifsta->direct_probe_tries++;
526 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
527 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
528 sdata->dev->name, print_mac(mac, ifsta->bssid));
529 ifsta->state = IEEE80211_STA_MLME_DISABLED;
530 return;
531 }
532
533 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
534 sdata->dev->name, print_mac(mac, ifsta->bssid),
535 ifsta->direct_probe_tries);
536
537 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
538
539 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
540
541 /* Direct probe is sent to broadcast address as some APs
542 * will not answer to direct packet in unassociated state.
543 */
544 ieee80211_send_probe_req(sdata, NULL,
545 ifsta->ssid, ifsta->ssid_len);
546
547 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
548 }
549
550
551 static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
552 struct ieee80211_if_sta *ifsta)
553 {
554 DECLARE_MAC_BUF(mac);
555
556 ifsta->auth_tries++;
557 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
558 printk(KERN_DEBUG "%s: authentication with AP %s"
559 " timed out\n",
560 sdata->dev->name, print_mac(mac, ifsta->bssid));
561 ifsta->state = IEEE80211_STA_MLME_DISABLED;
562 return;
563 }
564
565 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
566 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
567 sdata->dev->name, print_mac(mac, ifsta->bssid));
568
569 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
570
571 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
572 }
573
574 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
575 struct ieee80211_supported_band *sband,
576 u64 *rates)
577 {
578 int i, j, count;
579 *rates = 0;
580 count = 0;
581 for (i = 0; i < bss->supp_rates_len; i++) {
582 int rate = (bss->supp_rates[i] & 0x7F) * 5;
583
584 for (j = 0; j < sband->n_bitrates; j++)
585 if (sband->bitrates[j].bitrate == rate) {
586 *rates |= BIT(j);
587 count++;
588 break;
589 }
590 }
591
592 return count;
593 }
594
595 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
596 struct ieee80211_if_sta *ifsta)
597 {
598 struct ieee80211_local *local = sdata->local;
599 struct sk_buff *skb;
600 struct ieee80211_mgmt *mgmt;
601 u8 *pos, *ies, *ht_add_ie;
602 int i, len, count, rates_len, supp_rates_len;
603 u16 capab;
604 struct ieee80211_sta_bss *bss;
605 int wmm = 0;
606 struct ieee80211_supported_band *sband;
607 u64 rates = 0;
608
609 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
610 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
611 ifsta->ssid_len);
612 if (!skb) {
613 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
614 "frame\n", sdata->dev->name);
615 return;
616 }
617 skb_reserve(skb, local->hw.extra_tx_headroom);
618
619 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
620
621 capab = ifsta->capab;
622
623 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
624 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
625 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
626 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
627 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
628 }
629
630 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
631 local->hw.conf.channel->center_freq,
632 ifsta->ssid, ifsta->ssid_len);
633 if (bss) {
634 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
635 capab |= WLAN_CAPABILITY_PRIVACY;
636 if (bss->wmm_used)
637 wmm = 1;
638
639 /* get all rates supported by the device and the AP as
640 * some APs don't like getting a superset of their rates
641 * in the association request (e.g. D-Link DAP 1353 in
642 * b-only mode) */
643 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
644
645 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
646 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
647 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
648
649 ieee80211_rx_bss_put(local, bss);
650 } else {
651 rates = ~0;
652 rates_len = sband->n_bitrates;
653 }
654
655 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
656 memset(mgmt, 0, 24);
657 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
658 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
659 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
660
661 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
662 skb_put(skb, 10);
663 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
664 IEEE80211_STYPE_REASSOC_REQ);
665 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
666 mgmt->u.reassoc_req.listen_interval =
667 cpu_to_le16(local->hw.conf.listen_interval);
668 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
669 ETH_ALEN);
670 } else {
671 skb_put(skb, 4);
672 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
673 IEEE80211_STYPE_ASSOC_REQ);
674 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
675 mgmt->u.reassoc_req.listen_interval =
676 cpu_to_le16(local->hw.conf.listen_interval);
677 }
678
679 /* SSID */
680 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
681 *pos++ = WLAN_EID_SSID;
682 *pos++ = ifsta->ssid_len;
683 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
684
685 /* add all rates which were marked to be used above */
686 supp_rates_len = rates_len;
687 if (supp_rates_len > 8)
688 supp_rates_len = 8;
689
690 len = sband->n_bitrates;
691 pos = skb_put(skb, supp_rates_len + 2);
692 *pos++ = WLAN_EID_SUPP_RATES;
693 *pos++ = supp_rates_len;
694
695 count = 0;
696 for (i = 0; i < sband->n_bitrates; i++) {
697 if (BIT(i) & rates) {
698 int rate = sband->bitrates[i].bitrate;
699 *pos++ = (u8) (rate / 5);
700 if (++count == 8)
701 break;
702 }
703 }
704
705 if (rates_len > count) {
706 pos = skb_put(skb, rates_len - count + 2);
707 *pos++ = WLAN_EID_EXT_SUPP_RATES;
708 *pos++ = rates_len - count;
709
710 for (i++; i < sband->n_bitrates; i++) {
711 if (BIT(i) & rates) {
712 int rate = sband->bitrates[i].bitrate;
713 *pos++ = (u8) (rate / 5);
714 }
715 }
716 }
717
718 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
719 /* 1. power capabilities */
720 pos = skb_put(skb, 4);
721 *pos++ = WLAN_EID_PWR_CAPABILITY;
722 *pos++ = 2;
723 *pos++ = 0; /* min tx power */
724 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
725
726 /* 2. supported channels */
727 /* TODO: get this in reg domain format */
728 pos = skb_put(skb, 2 * sband->n_channels + 2);
729 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
730 *pos++ = 2 * sband->n_channels;
731 for (i = 0; i < sband->n_channels; i++) {
732 *pos++ = ieee80211_frequency_to_channel(
733 sband->channels[i].center_freq);
734 *pos++ = 1; /* one channel in the subband*/
735 }
736 }
737
738 if (ifsta->extra_ie) {
739 pos = skb_put(skb, ifsta->extra_ie_len);
740 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
741 }
742
743 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
744 pos = skb_put(skb, 9);
745 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
746 *pos++ = 7; /* len */
747 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
748 *pos++ = 0x50;
749 *pos++ = 0xf2;
750 *pos++ = 2; /* WME */
751 *pos++ = 0; /* WME info */
752 *pos++ = 1; /* WME ver */
753 *pos++ = 0;
754 }
755
756 /* wmm support is a must to HT */
757 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
758 sband->ht_info.ht_supported &&
759 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
760 struct ieee80211_ht_addt_info *ht_add_info =
761 (struct ieee80211_ht_addt_info *)ht_add_ie;
762 u16 cap = sband->ht_info.cap;
763 __le16 tmp;
764 u32 flags = local->hw.conf.channel->flags;
765
766 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
767 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
768 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
769 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
770 cap &= ~IEEE80211_HT_CAP_SGI_40;
771 }
772 break;
773 case IEEE80211_HT_IE_CHA_SEC_BELOW:
774 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
775 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
776 cap &= ~IEEE80211_HT_CAP_SGI_40;
777 }
778 break;
779 }
780
781 tmp = cpu_to_le16(cap);
782 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
783 *pos++ = WLAN_EID_HT_CAPABILITY;
784 *pos++ = sizeof(struct ieee80211_ht_cap);
785 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
786 memcpy(pos, &tmp, sizeof(u16));
787 pos += sizeof(u16);
788 /* TODO: needs a define here for << 2 */
789 *pos++ = sband->ht_info.ampdu_factor |
790 (sband->ht_info.ampdu_density << 2);
791 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
792 }
793
794 kfree(ifsta->assocreq_ies);
795 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
796 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
797 if (ifsta->assocreq_ies)
798 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
799
800 ieee80211_sta_tx(sdata, skb, 0);
801 }
802
803
804 static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
805 struct ieee80211_if_sta *ifsta, u16 reason)
806 {
807 struct ieee80211_local *local = sdata->local;
808 struct sk_buff *skb;
809 struct ieee80211_mgmt *mgmt;
810
811 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
812 if (!skb) {
813 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
814 "frame\n", sdata->dev->name);
815 return;
816 }
817 skb_reserve(skb, local->hw.extra_tx_headroom);
818
819 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
820 memset(mgmt, 0, 24);
821 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
822 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
823 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
824 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
825 IEEE80211_STYPE_DEAUTH);
826 skb_put(skb, 2);
827 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
828
829 ieee80211_sta_tx(sdata, skb, 0);
830 }
831
832 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
833 {
834 if (!sdata || !sdata->default_key ||
835 sdata->default_key->conf.alg != ALG_WEP)
836 return 0;
837 return 1;
838 }
839
840 static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
841 struct ieee80211_if_sta *ifsta, u16 reason)
842 {
843 struct ieee80211_local *local = sdata->local;
844 struct sk_buff *skb;
845 struct ieee80211_mgmt *mgmt;
846
847 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
848 if (!skb) {
849 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
850 "frame\n", sdata->dev->name);
851 return;
852 }
853 skb_reserve(skb, local->hw.extra_tx_headroom);
854
855 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
856 memset(mgmt, 0, 24);
857 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
858 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
859 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
860 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
861 IEEE80211_STYPE_DISASSOC);
862 skb_put(skb, 2);
863 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
864
865 ieee80211_sta_tx(sdata, skb, 0);
866 }
867
868 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
869 struct ieee80211_if_sta *ifsta, bool deauth,
870 bool self_disconnected, u16 reason)
871 {
872 struct ieee80211_local *local = sdata->local;
873 struct sta_info *sta;
874 u32 changed = BSS_CHANGED_ASSOC;
875
876 rcu_read_lock();
877
878 sta = sta_info_get(local, ifsta->bssid);
879 if (!sta) {
880 rcu_read_unlock();
881 return;
882 }
883
884 if (deauth) {
885 ifsta->direct_probe_tries = 0;
886 ifsta->auth_tries = 0;
887 }
888 ifsta->assoc_scan_tries = 0;
889 ifsta->assoc_tries = 0;
890
891 netif_tx_stop_all_queues(sdata->dev);
892 netif_carrier_off(sdata->dev);
893
894 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
895
896 if (self_disconnected) {
897 if (deauth)
898 ieee80211_send_deauth(sdata, ifsta, reason);
899 else
900 ieee80211_send_disassoc(sdata, ifsta, reason);
901 }
902
903 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
904 changed |= ieee80211_reset_erp_info(sdata);
905
906 if (sdata->bss_conf.assoc_ht)
907 changed |= BSS_CHANGED_HT;
908
909 sdata->bss_conf.assoc_ht = 0;
910 sdata->bss_conf.ht_conf = NULL;
911 sdata->bss_conf.ht_bss_conf = NULL;
912
913 ieee80211_led_assoc(local, 0);
914 sdata->bss_conf.assoc = 0;
915
916 ieee80211_sta_send_apinfo(sdata, ifsta);
917
918 if (self_disconnected)
919 ifsta->state = IEEE80211_STA_MLME_DISABLED;
920
921 sta_info_unlink(&sta);
922
923 rcu_read_unlock();
924
925 sta_info_destroy(sta);
926 }
927
928 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
929 struct ieee80211_if_sta *ifsta)
930 {
931 struct ieee80211_local *local = sdata->local;
932 struct ieee80211_sta_bss *bss;
933 int bss_privacy;
934 int wep_privacy;
935 int privacy_invoked;
936
937 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
938 return 0;
939
940 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
941 local->hw.conf.channel->center_freq,
942 ifsta->ssid, ifsta->ssid_len);
943 if (!bss)
944 return 0;
945
946 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
947 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
948 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
949
950 ieee80211_rx_bss_put(local, bss);
951
952 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
953 return 0;
954
955 return 1;
956 }
957
958 static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
959 struct ieee80211_if_sta *ifsta)
960 {
961 DECLARE_MAC_BUF(mac);
962
963 ifsta->assoc_tries++;
964 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
965 printk(KERN_DEBUG "%s: association with AP %s"
966 " timed out\n",
967 sdata->dev->name, print_mac(mac, ifsta->bssid));
968 ifsta->state = IEEE80211_STA_MLME_DISABLED;
969 return;
970 }
971
972 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
973 printk(KERN_DEBUG "%s: associate with AP %s\n",
974 sdata->dev->name, print_mac(mac, ifsta->bssid));
975 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
976 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
977 "mixed-cell disabled - abort association\n", sdata->dev->name);
978 ifsta->state = IEEE80211_STA_MLME_DISABLED;
979 return;
980 }
981
982 ieee80211_send_assoc(sdata, ifsta);
983
984 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
985 }
986
987
988 static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
989 struct ieee80211_if_sta *ifsta)
990 {
991 struct ieee80211_local *local = sdata->local;
992 struct sta_info *sta;
993 int disassoc;
994 DECLARE_MAC_BUF(mac);
995
996 /* TODO: start monitoring current AP signal quality and number of
997 * missed beacons. Scan other channels every now and then and search
998 * for better APs. */
999 /* TODO: remove expired BSSes */
1000
1001 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
1002
1003 rcu_read_lock();
1004
1005 sta = sta_info_get(local, ifsta->bssid);
1006 if (!sta) {
1007 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1008 sdata->dev->name, print_mac(mac, ifsta->bssid));
1009 disassoc = 1;
1010 } else {
1011 disassoc = 0;
1012 if (time_after(jiffies,
1013 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1014 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1015 printk(KERN_DEBUG "%s: No ProbeResp from "
1016 "current AP %s - assume out of "
1017 "range\n",
1018 sdata->dev->name, print_mac(mac, ifsta->bssid));
1019 disassoc = 1;
1020 } else
1021 ieee80211_send_probe_req(sdata, ifsta->bssid,
1022 local->scan_ssid,
1023 local->scan_ssid_len);
1024 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1025 } else {
1026 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1027 if (time_after(jiffies, ifsta->last_probe +
1028 IEEE80211_PROBE_INTERVAL)) {
1029 ifsta->last_probe = jiffies;
1030 ieee80211_send_probe_req(sdata, ifsta->bssid,
1031 ifsta->ssid,
1032 ifsta->ssid_len);
1033 }
1034 }
1035 }
1036
1037 rcu_read_unlock();
1038
1039 if (disassoc)
1040 ieee80211_set_disassoc(sdata, ifsta, true, true,
1041 WLAN_REASON_PREV_AUTH_NOT_VALID);
1042 else
1043 mod_timer(&ifsta->timer, jiffies +
1044 IEEE80211_MONITORING_INTERVAL);
1045 }
1046
1047
1048 static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1049 struct ieee80211_if_sta *ifsta)
1050 {
1051 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
1052 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1053 ieee80211_associate(sdata, ifsta);
1054 }
1055
1056
1057 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1058 struct ieee80211_if_sta *ifsta,
1059 struct ieee80211_mgmt *mgmt,
1060 size_t len)
1061 {
1062 u8 *pos;
1063 struct ieee802_11_elems elems;
1064
1065 pos = mgmt->u.auth.variable;
1066 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1067 if (!elems.challenge)
1068 return;
1069 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
1070 elems.challenge_len + 2, 1);
1071 }
1072
1073 static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
1074 u8 dialog_token, u16 status, u16 policy,
1075 u16 buf_size, u16 timeout)
1076 {
1077 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1078 struct ieee80211_local *local = sdata->local;
1079 struct sk_buff *skb;
1080 struct ieee80211_mgmt *mgmt;
1081 u16 capab;
1082
1083 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1084
1085 if (!skb) {
1086 printk(KERN_DEBUG "%s: failed to allocate buffer "
1087 "for addba resp frame\n", sdata->dev->name);
1088 return;
1089 }
1090
1091 skb_reserve(skb, local->hw.extra_tx_headroom);
1092 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1093 memset(mgmt, 0, 24);
1094 memcpy(mgmt->da, da, ETH_ALEN);
1095 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1096 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1097 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1098 else
1099 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1100 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1101 IEEE80211_STYPE_ACTION);
1102
1103 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1104 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1105 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1106 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1107
1108 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1109 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1110 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1111
1112 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1113 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1114 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1115
1116 ieee80211_sta_tx(sdata, skb, 0);
1117
1118 return;
1119 }
1120
1121 void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
1122 u16 tid, u8 dialog_token, u16 start_seq_num,
1123 u16 agg_size, u16 timeout)
1124 {
1125 struct ieee80211_local *local = sdata->local;
1126 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1127 struct sk_buff *skb;
1128 struct ieee80211_mgmt *mgmt;
1129 u16 capab;
1130
1131 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1132
1133 if (!skb) {
1134 printk(KERN_ERR "%s: failed to allocate buffer "
1135 "for addba request frame\n", sdata->dev->name);
1136 return;
1137 }
1138 skb_reserve(skb, local->hw.extra_tx_headroom);
1139 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1140 memset(mgmt, 0, 24);
1141 memcpy(mgmt->da, da, ETH_ALEN);
1142 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1143 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1144 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1145 else
1146 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1147
1148 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1149 IEEE80211_STYPE_ACTION);
1150
1151 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1152
1153 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1154 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1155
1156 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1157 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1158 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1159 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1160
1161 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1162
1163 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1164 mgmt->u.action.u.addba_req.start_seq_num =
1165 cpu_to_le16(start_seq_num << 4);
1166
1167 ieee80211_sta_tx(sdata, skb, 0);
1168 }
1169
1170 /*
1171 * After accepting the AddBA Request we activated a timer,
1172 * resetting it after each frame that arrives from the originator.
1173 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1174 */
1175 static void sta_rx_agg_session_timer_expired(unsigned long data)
1176 {
1177 /* not an elegant detour, but there is no choice as the timer passes
1178 * only one argument, and various sta_info are needed here, so init
1179 * flow in sta_info_create gives the TID as data, while the timer_to_id
1180 * array gives the sta through container_of */
1181 u8 *ptid = (u8 *)data;
1182 u8 *timer_to_id = ptid - *ptid;
1183 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1184 timer_to_tid[0]);
1185
1186 #ifdef CONFIG_MAC80211_HT_DEBUG
1187 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1188 #endif
1189 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1190 (u16)*ptid, WLAN_BACK_TIMER,
1191 WLAN_REASON_QSTA_TIMEOUT);
1192 }
1193
1194 static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1195 struct ieee80211_mgmt *mgmt,
1196 size_t len)
1197 {
1198 struct ieee80211_hw *hw = &local->hw;
1199 struct ieee80211_conf *conf = &hw->conf;
1200 struct sta_info *sta;
1201 struct tid_ampdu_rx *tid_agg_rx;
1202 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1203 u8 dialog_token;
1204 int ret = -EOPNOTSUPP;
1205 DECLARE_MAC_BUF(mac);
1206
1207 rcu_read_lock();
1208
1209 sta = sta_info_get(local, mgmt->sa);
1210 if (!sta) {
1211 rcu_read_unlock();
1212 return;
1213 }
1214
1215 /* extract session parameters from addba request frame */
1216 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1217 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1218 start_seq_num =
1219 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1220
1221 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1222 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1223 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1224 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1225
1226 status = WLAN_STATUS_REQUEST_DECLINED;
1227
1228 /* sanity check for incoming parameters:
1229 * check if configuration can support the BA policy
1230 * and if buffer size does not exceeds max value */
1231 if (((ba_policy != 1)
1232 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1233 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1234 status = WLAN_STATUS_INVALID_QOS_PARAM;
1235 #ifdef CONFIG_MAC80211_HT_DEBUG
1236 if (net_ratelimit())
1237 printk(KERN_DEBUG "AddBA Req with bad params from "
1238 "%s on tid %u. policy %d, buffer size %d\n",
1239 print_mac(mac, mgmt->sa), tid, ba_policy,
1240 buf_size);
1241 #endif /* CONFIG_MAC80211_HT_DEBUG */
1242 goto end_no_lock;
1243 }
1244 /* determine default buffer size */
1245 if (buf_size == 0) {
1246 struct ieee80211_supported_band *sband;
1247
1248 sband = local->hw.wiphy->bands[conf->channel->band];
1249 buf_size = IEEE80211_MIN_AMPDU_BUF;
1250 buf_size = buf_size << sband->ht_info.ampdu_factor;
1251 }
1252
1253
1254 /* examine state machine */
1255 spin_lock_bh(&sta->lock);
1256
1257 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1258 #ifdef CONFIG_MAC80211_HT_DEBUG
1259 if (net_ratelimit())
1260 printk(KERN_DEBUG "unexpected AddBA Req from "
1261 "%s on tid %u\n",
1262 print_mac(mac, mgmt->sa), tid);
1263 #endif /* CONFIG_MAC80211_HT_DEBUG */
1264 goto end;
1265 }
1266
1267 /* prepare A-MPDU MLME for Rx aggregation */
1268 sta->ampdu_mlme.tid_rx[tid] =
1269 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1270 if (!sta->ampdu_mlme.tid_rx[tid]) {
1271 #ifdef CONFIG_MAC80211_HT_DEBUG
1272 if (net_ratelimit())
1273 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1274 tid);
1275 #endif
1276 goto end;
1277 }
1278 /* rx timer */
1279 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1280 sta_rx_agg_session_timer_expired;
1281 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1282 (unsigned long)&sta->timer_to_tid[tid];
1283 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1284
1285 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1286
1287 /* prepare reordering buffer */
1288 tid_agg_rx->reorder_buf =
1289 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1290 if (!tid_agg_rx->reorder_buf) {
1291 #ifdef CONFIG_MAC80211_HT_DEBUG
1292 if (net_ratelimit())
1293 printk(KERN_ERR "can not allocate reordering buffer "
1294 "to tid %d\n", tid);
1295 #endif
1296 kfree(sta->ampdu_mlme.tid_rx[tid]);
1297 goto end;
1298 }
1299 memset(tid_agg_rx->reorder_buf, 0,
1300 buf_size * sizeof(struct sk_buff *));
1301
1302 if (local->ops->ampdu_action)
1303 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1304 sta->addr, tid, &start_seq_num);
1305 #ifdef CONFIG_MAC80211_HT_DEBUG
1306 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1307 #endif /* CONFIG_MAC80211_HT_DEBUG */
1308
1309 if (ret) {
1310 kfree(tid_agg_rx->reorder_buf);
1311 kfree(tid_agg_rx);
1312 sta->ampdu_mlme.tid_rx[tid] = NULL;
1313 goto end;
1314 }
1315
1316 /* change state and send addba resp */
1317 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1318 tid_agg_rx->dialog_token = dialog_token;
1319 tid_agg_rx->ssn = start_seq_num;
1320 tid_agg_rx->head_seq_num = start_seq_num;
1321 tid_agg_rx->buf_size = buf_size;
1322 tid_agg_rx->timeout = timeout;
1323 tid_agg_rx->stored_mpdu_num = 0;
1324 status = WLAN_STATUS_SUCCESS;
1325 end:
1326 spin_unlock_bh(&sta->lock);
1327
1328 end_no_lock:
1329 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1330 dialog_token, status, 1, buf_size, timeout);
1331 rcu_read_unlock();
1332 }
1333
1334 static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1335 struct ieee80211_mgmt *mgmt,
1336 size_t len)
1337 {
1338 struct ieee80211_hw *hw = &local->hw;
1339 struct sta_info *sta;
1340 u16 capab;
1341 u16 tid;
1342 u8 *state;
1343
1344 rcu_read_lock();
1345
1346 sta = sta_info_get(local, mgmt->sa);
1347 if (!sta) {
1348 rcu_read_unlock();
1349 return;
1350 }
1351
1352 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1353 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1354
1355 state = &sta->ampdu_mlme.tid_state_tx[tid];
1356
1357 spin_lock_bh(&sta->lock);
1358
1359 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1360 spin_unlock_bh(&sta->lock);
1361 goto addba_resp_exit;
1362 }
1363
1364 if (mgmt->u.action.u.addba_resp.dialog_token !=
1365 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1366 spin_unlock_bh(&sta->lock);
1367 #ifdef CONFIG_MAC80211_HT_DEBUG
1368 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1369 #endif /* CONFIG_MAC80211_HT_DEBUG */
1370 goto addba_resp_exit;
1371 }
1372
1373 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1374 #ifdef CONFIG_MAC80211_HT_DEBUG
1375 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1376 #endif /* CONFIG_MAC80211_HT_DEBUG */
1377 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1378 == WLAN_STATUS_SUCCESS) {
1379 *state |= HT_ADDBA_RECEIVED_MSK;
1380 sta->ampdu_mlme.addba_req_num[tid] = 0;
1381
1382 if (*state == HT_AGG_STATE_OPERATIONAL)
1383 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1384
1385 spin_unlock_bh(&sta->lock);
1386 } else {
1387 sta->ampdu_mlme.addba_req_num[tid]++;
1388 /* this will allow the state check in stop_BA_session */
1389 *state = HT_AGG_STATE_OPERATIONAL;
1390 spin_unlock_bh(&sta->lock);
1391 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1392 WLAN_BACK_INITIATOR);
1393 }
1394
1395 addba_resp_exit:
1396 rcu_read_unlock();
1397 }
1398
1399 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
1400 u16 initiator, u16 reason_code)
1401 {
1402 struct ieee80211_local *local = sdata->local;
1403 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1404 struct sk_buff *skb;
1405 struct ieee80211_mgmt *mgmt;
1406 u16 params;
1407
1408 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1409
1410 if (!skb) {
1411 printk(KERN_ERR "%s: failed to allocate buffer "
1412 "for delba frame\n", sdata->dev->name);
1413 return;
1414 }
1415
1416 skb_reserve(skb, local->hw.extra_tx_headroom);
1417 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1418 memset(mgmt, 0, 24);
1419 memcpy(mgmt->da, da, ETH_ALEN);
1420 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1421 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1422 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
1423 else
1424 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1425 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1426 IEEE80211_STYPE_ACTION);
1427
1428 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1429
1430 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1431 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1432 params = (u16)(initiator << 11); /* bit 11 initiator */
1433 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1434
1435 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1436 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1437
1438 ieee80211_sta_tx(sdata, skb, 0);
1439 }
1440
1441 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
1442 {
1443 struct ieee80211_local *local = sdata->local;
1444 struct sk_buff *skb;
1445 struct ieee80211_bar *bar;
1446 u16 bar_control = 0;
1447
1448 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1449 if (!skb) {
1450 printk(KERN_ERR "%s: failed to allocate buffer for "
1451 "bar frame\n", sdata->dev->name);
1452 return;
1453 }
1454 skb_reserve(skb, local->hw.extra_tx_headroom);
1455 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1456 memset(bar, 0, sizeof(*bar));
1457 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1458 IEEE80211_STYPE_BACK_REQ);
1459 memcpy(bar->ra, ra, ETH_ALEN);
1460 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
1461 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1462 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1463 bar_control |= (u16)(tid << 12);
1464 bar->control = cpu_to_le16(bar_control);
1465 bar->start_seq_num = cpu_to_le16(ssn);
1466
1467 ieee80211_sta_tx(sdata, skb, 0);
1468 }
1469
1470 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
1471 u16 initiator, u16 reason)
1472 {
1473 struct ieee80211_local *local = sdata->local;
1474 struct ieee80211_hw *hw = &local->hw;
1475 struct sta_info *sta;
1476 int ret, i;
1477 DECLARE_MAC_BUF(mac);
1478
1479 rcu_read_lock();
1480
1481 sta = sta_info_get(local, ra);
1482 if (!sta) {
1483 rcu_read_unlock();
1484 return;
1485 }
1486
1487 /* check if TID is in operational state */
1488 spin_lock_bh(&sta->lock);
1489 if (sta->ampdu_mlme.tid_state_rx[tid]
1490 != HT_AGG_STATE_OPERATIONAL) {
1491 spin_unlock_bh(&sta->lock);
1492 rcu_read_unlock();
1493 return;
1494 }
1495 sta->ampdu_mlme.tid_state_rx[tid] =
1496 HT_AGG_STATE_REQ_STOP_BA_MSK |
1497 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1498 spin_unlock_bh(&sta->lock);
1499
1500 /* stop HW Rx aggregation. ampdu_action existence
1501 * already verified in session init so we add the BUG_ON */
1502 BUG_ON(!local->ops->ampdu_action);
1503
1504 #ifdef CONFIG_MAC80211_HT_DEBUG
1505 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1506 print_mac(mac, ra), tid);
1507 #endif /* CONFIG_MAC80211_HT_DEBUG */
1508
1509 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1510 ra, tid, NULL);
1511 if (ret)
1512 printk(KERN_DEBUG "HW problem - can not stop rx "
1513 "aggregation for tid %d\n", tid);
1514
1515 /* shutdown timer has not expired */
1516 if (initiator != WLAN_BACK_TIMER)
1517 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1518
1519 /* check if this is a self generated aggregation halt */
1520 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1521 ieee80211_send_delba(sdata, ra, tid, 0, reason);
1522
1523 /* free the reordering buffer */
1524 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1525 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1526 /* release the reordered frames */
1527 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1528 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1529 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1530 }
1531 }
1532 /* free resources */
1533 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1534 kfree(sta->ampdu_mlme.tid_rx[tid]);
1535 sta->ampdu_mlme.tid_rx[tid] = NULL;
1536 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1537
1538 rcu_read_unlock();
1539 }
1540
1541
1542 static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1543 struct ieee80211_mgmt *mgmt, size_t len)
1544 {
1545 struct ieee80211_local *local = sdata->local;
1546 struct sta_info *sta;
1547 u16 tid, params;
1548 u16 initiator;
1549 DECLARE_MAC_BUF(mac);
1550
1551 rcu_read_lock();
1552
1553 sta = sta_info_get(local, mgmt->sa);
1554 if (!sta) {
1555 rcu_read_unlock();
1556 return;
1557 }
1558
1559 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1560 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1561 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1562
1563 #ifdef CONFIG_MAC80211_HT_DEBUG
1564 if (net_ratelimit())
1565 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1566 print_mac(mac, mgmt->sa),
1567 initiator ? "initiator" : "recipient", tid,
1568 mgmt->u.action.u.delba.reason_code);
1569 #endif /* CONFIG_MAC80211_HT_DEBUG */
1570
1571 if (initiator == WLAN_BACK_INITIATOR)
1572 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1573 WLAN_BACK_INITIATOR, 0);
1574 else { /* WLAN_BACK_RECIPIENT */
1575 spin_lock_bh(&sta->lock);
1576 sta->ampdu_mlme.tid_state_tx[tid] =
1577 HT_AGG_STATE_OPERATIONAL;
1578 spin_unlock_bh(&sta->lock);
1579 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1580 WLAN_BACK_RECIPIENT);
1581 }
1582 rcu_read_unlock();
1583 }
1584
1585 /*
1586 * After sending add Block Ack request we activated a timer until
1587 * add Block Ack response will arrive from the recipient.
1588 * If this timer expires sta_addba_resp_timer_expired will be executed.
1589 */
1590 void sta_addba_resp_timer_expired(unsigned long data)
1591 {
1592 /* not an elegant detour, but there is no choice as the timer passes
1593 * only one argument, and both sta_info and TID are needed, so init
1594 * flow in sta_info_create gives the TID as data, while the timer_to_id
1595 * array gives the sta through container_of */
1596 u16 tid = *(u8 *)data;
1597 struct sta_info *temp_sta = container_of((void *)data,
1598 struct sta_info, timer_to_tid[tid]);
1599
1600 struct ieee80211_local *local = temp_sta->local;
1601 struct ieee80211_hw *hw = &local->hw;
1602 struct sta_info *sta;
1603 u8 *state;
1604
1605 rcu_read_lock();
1606
1607 sta = sta_info_get(local, temp_sta->addr);
1608 if (!sta) {
1609 rcu_read_unlock();
1610 return;
1611 }
1612
1613 state = &sta->ampdu_mlme.tid_state_tx[tid];
1614 /* check if the TID waits for addBA response */
1615 spin_lock_bh(&sta->lock);
1616 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1617 spin_unlock_bh(&sta->lock);
1618 *state = HT_AGG_STATE_IDLE;
1619 #ifdef CONFIG_MAC80211_HT_DEBUG
1620 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1621 "expecting addBA response there", tid);
1622 #endif
1623 goto timer_expired_exit;
1624 }
1625
1626 #ifdef CONFIG_MAC80211_HT_DEBUG
1627 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1628 #endif
1629
1630 /* go through the state check in stop_BA_session */
1631 *state = HT_AGG_STATE_OPERATIONAL;
1632 spin_unlock_bh(&sta->lock);
1633 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1634 WLAN_BACK_INITIATOR);
1635
1636 timer_expired_exit:
1637 rcu_read_unlock();
1638 }
1639
1640 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
1641 {
1642 struct ieee80211_local *local = sdata->local;
1643 int i;
1644
1645 for (i = 0; i < STA_TID_NUM; i++) {
1646 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1647 WLAN_BACK_INITIATOR);
1648 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
1649 WLAN_BACK_RECIPIENT,
1650 WLAN_REASON_QSTA_LEAVE_QBSS);
1651 }
1652 }
1653
1654 static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
1655 struct ieee80211_msrment_ie *request_ie,
1656 const u8 *da, const u8 *bssid,
1657 u8 dialog_token)
1658 {
1659 struct ieee80211_local *local = sdata->local;
1660 struct sk_buff *skb;
1661 struct ieee80211_mgmt *msr_report;
1662
1663 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1664 sizeof(struct ieee80211_msrment_ie));
1665
1666 if (!skb) {
1667 printk(KERN_ERR "%s: failed to allocate buffer for "
1668 "measurement report frame\n", sdata->dev->name);
1669 return;
1670 }
1671
1672 skb_reserve(skb, local->hw.extra_tx_headroom);
1673 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1674 memset(msr_report, 0, 24);
1675 memcpy(msr_report->da, da, ETH_ALEN);
1676 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
1677 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1678 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1679 IEEE80211_STYPE_ACTION);
1680
1681 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1682 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1683 msr_report->u.action.u.measurement.action_code =
1684 WLAN_ACTION_SPCT_MSR_RPRT;
1685 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1686
1687 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1688 msr_report->u.action.u.measurement.length =
1689 sizeof(struct ieee80211_msrment_ie);
1690
1691 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1692 sizeof(struct ieee80211_msrment_ie));
1693 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1694 msr_report->u.action.u.measurement.msr_elem.mode |=
1695 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1696 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1697
1698 ieee80211_sta_tx(sdata, skb, 0);
1699 }
1700
1701 static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1702 struct ieee80211_mgmt *mgmt,
1703 size_t len)
1704 {
1705 /*
1706 * Ignoring measurement request is spec violation.
1707 * Mandatory measurements must be reported optional
1708 * measurements might be refused or reported incapable
1709 * For now just refuse
1710 * TODO: Answer basic measurement as unmeasured
1711 */
1712 ieee80211_send_refuse_measurement_request(sdata,
1713 &mgmt->u.action.u.measurement.msr_elem,
1714 mgmt->sa, mgmt->bssid,
1715 mgmt->u.action.u.measurement.dialog_token);
1716 }
1717
1718
1719 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1720 struct ieee80211_if_sta *ifsta,
1721 struct ieee80211_mgmt *mgmt,
1722 size_t len)
1723 {
1724 u16 auth_alg, auth_transaction, status_code;
1725 DECLARE_MAC_BUF(mac);
1726
1727 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
1728 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1729 return;
1730
1731 if (len < 24 + 6)
1732 return;
1733
1734 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1735 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1736 return;
1737
1738 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1739 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1740 return;
1741
1742 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1743 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1744 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1745
1746 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1747 /*
1748 * IEEE 802.11 standard does not require authentication in IBSS
1749 * networks and most implementations do not seem to use it.
1750 * However, try to reply to authentication attempts if someone
1751 * has actually implemented this.
1752 */
1753 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1754 return;
1755 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
1756 }
1757
1758 if (auth_alg != ifsta->auth_alg ||
1759 auth_transaction != ifsta->auth_transaction)
1760 return;
1761
1762 if (status_code != WLAN_STATUS_SUCCESS) {
1763 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1764 u8 algs[3];
1765 const int num_algs = ARRAY_SIZE(algs);
1766 int i, pos;
1767 algs[0] = algs[1] = algs[2] = 0xff;
1768 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1769 algs[0] = WLAN_AUTH_OPEN;
1770 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1771 algs[1] = WLAN_AUTH_SHARED_KEY;
1772 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1773 algs[2] = WLAN_AUTH_LEAP;
1774 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1775 pos = 0;
1776 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1777 pos = 1;
1778 else
1779 pos = 2;
1780 for (i = 0; i < num_algs; i++) {
1781 pos++;
1782 if (pos >= num_algs)
1783 pos = 0;
1784 if (algs[pos] == ifsta->auth_alg ||
1785 algs[pos] == 0xff)
1786 continue;
1787 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1788 !ieee80211_sta_wep_configured(sdata))
1789 continue;
1790 ifsta->auth_alg = algs[pos];
1791 break;
1792 }
1793 }
1794 return;
1795 }
1796
1797 switch (ifsta->auth_alg) {
1798 case WLAN_AUTH_OPEN:
1799 case WLAN_AUTH_LEAP:
1800 ieee80211_auth_completed(sdata, ifsta);
1801 break;
1802 case WLAN_AUTH_SHARED_KEY:
1803 if (ifsta->auth_transaction == 4)
1804 ieee80211_auth_completed(sdata, ifsta);
1805 else
1806 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
1807 break;
1808 }
1809 }
1810
1811
1812 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1813 struct ieee80211_if_sta *ifsta,
1814 struct ieee80211_mgmt *mgmt,
1815 size_t len)
1816 {
1817 u16 reason_code;
1818 DECLARE_MAC_BUF(mac);
1819
1820 if (len < 24 + 2)
1821 return;
1822
1823 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1824 return;
1825
1826 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1827
1828 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1829 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
1830
1831 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1832 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1833 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1834 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
1835 mod_timer(&ifsta->timer, jiffies +
1836 IEEE80211_RETRY_AUTH_INTERVAL);
1837 }
1838
1839 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
1840 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1841 }
1842
1843
1844 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1845 struct ieee80211_if_sta *ifsta,
1846 struct ieee80211_mgmt *mgmt,
1847 size_t len)
1848 {
1849 u16 reason_code;
1850 DECLARE_MAC_BUF(mac);
1851
1852 if (len < 24 + 2)
1853 return;
1854
1855 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1856 return;
1857
1858 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1859
1860 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1861 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
1862
1863 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1864 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
1865 mod_timer(&ifsta->timer, jiffies +
1866 IEEE80211_RETRY_AUTH_INTERVAL);
1867 }
1868
1869 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
1870 }
1871
1872
1873 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1874 struct ieee80211_if_sta *ifsta,
1875 struct ieee80211_mgmt *mgmt,
1876 size_t len,
1877 int reassoc)
1878 {
1879 struct ieee80211_local *local = sdata->local;
1880 struct ieee80211_supported_band *sband;
1881 struct sta_info *sta;
1882 u64 rates, basic_rates;
1883 u16 capab_info, status_code, aid;
1884 struct ieee802_11_elems elems;
1885 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1886 u8 *pos;
1887 int i, j;
1888 DECLARE_MAC_BUF(mac);
1889 bool have_higher_than_11mbit = false;
1890
1891 /* AssocResp and ReassocResp have identical structure, so process both
1892 * of them in this function. */
1893
1894 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
1895 return;
1896
1897 if (len < 24 + 6)
1898 return;
1899
1900 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1901 return;
1902
1903 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1904 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1905 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1906
1907 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1908 "status=%d aid=%d)\n",
1909 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1910 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1911
1912 if (status_code != WLAN_STATUS_SUCCESS) {
1913 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1914 sdata->dev->name, status_code);
1915 /* if this was a reassociation, ensure we try a "full"
1916 * association next time. This works around some broken APs
1917 * which do not correctly reject reassociation requests. */
1918 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1919 return;
1920 }
1921
1922 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1923 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1924 "set\n", sdata->dev->name, aid);
1925 aid &= ~(BIT(15) | BIT(14));
1926
1927 pos = mgmt->u.assoc_resp.variable;
1928 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1929
1930 if (!elems.supp_rates) {
1931 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1932 sdata->dev->name);
1933 return;
1934 }
1935
1936 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
1937 ifsta->aid = aid;
1938 ifsta->ap_capab = capab_info;
1939
1940 kfree(ifsta->assocresp_ies);
1941 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1942 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1943 if (ifsta->assocresp_ies)
1944 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1945
1946 rcu_read_lock();
1947
1948 /* Add STA entry for the AP */
1949 sta = sta_info_get(local, ifsta->bssid);
1950 if (!sta) {
1951 struct ieee80211_sta_bss *bss;
1952 int err;
1953
1954 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1955 if (!sta) {
1956 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1957 " the AP\n", sdata->dev->name);
1958 rcu_read_unlock();
1959 return;
1960 }
1961 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1962 local->hw.conf.channel->center_freq,
1963 ifsta->ssid, ifsta->ssid_len);
1964 if (bss) {
1965 sta->last_signal = bss->signal;
1966 sta->last_qual = bss->qual;
1967 sta->last_noise = bss->noise;
1968 ieee80211_rx_bss_put(local, bss);
1969 }
1970
1971 err = sta_info_insert(sta);
1972 if (err) {
1973 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1974 " the AP (error %d)\n", sdata->dev->name, err);
1975 rcu_read_unlock();
1976 return;
1977 }
1978 /* update new sta with its last rx activity */
1979 sta->last_rx = jiffies;
1980 }
1981
1982 /*
1983 * FIXME: Do we really need to update the sta_info's information here?
1984 * We already know about the AP (we found it in our list) so it
1985 * should already be filled with the right info, no?
1986 * As is stands, all this is racy because typically we assume
1987 * the information that is filled in here (except flags) doesn't
1988 * change while a STA structure is alive. As such, it should move
1989 * to between the sta_info_alloc() and sta_info_insert() above.
1990 */
1991
1992 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1993 WLAN_STA_AUTHORIZED);
1994
1995 rates = 0;
1996 basic_rates = 0;
1997 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1998
1999 for (i = 0; i < elems.supp_rates_len; i++) {
2000 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2001
2002 if (rate > 110)
2003 have_higher_than_11mbit = true;
2004
2005 for (j = 0; j < sband->n_bitrates; j++) {
2006 if (sband->bitrates[j].bitrate == rate)
2007 rates |= BIT(j);
2008 if (elems.supp_rates[i] & 0x80)
2009 basic_rates |= BIT(j);
2010 }
2011 }
2012
2013 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2014 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2015
2016 if (rate > 110)
2017 have_higher_than_11mbit = true;
2018
2019 for (j = 0; j < sband->n_bitrates; j++) {
2020 if (sband->bitrates[j].bitrate == rate)
2021 rates |= BIT(j);
2022 if (elems.ext_supp_rates[i] & 0x80)
2023 basic_rates |= BIT(j);
2024 }
2025 }
2026
2027 sta->supp_rates[local->hw.conf.channel->band] = rates;
2028 sdata->basic_rates = basic_rates;
2029
2030 /* cf. IEEE 802.11 9.2.12 */
2031 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2032 have_higher_than_11mbit)
2033 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2034 else
2035 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2036
2037 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2038 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2039 struct ieee80211_ht_bss_info bss_info;
2040 ieee80211_ht_cap_ie_to_ht_info(
2041 (struct ieee80211_ht_cap *)
2042 elems.ht_cap_elem, &sta->ht_info);
2043 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2044 (struct ieee80211_ht_addt_info *)
2045 elems.ht_info_elem, &bss_info);
2046 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2047 }
2048
2049 rate_control_rate_init(sta, local);
2050
2051 if (elems.wmm_param) {
2052 set_sta_flags(sta, WLAN_STA_WME);
2053 rcu_read_unlock();
2054 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2055 elems.wmm_param_len);
2056 } else
2057 rcu_read_unlock();
2058
2059 /* set AID and assoc capability,
2060 * ieee80211_set_associated() will tell the driver */
2061 bss_conf->aid = aid;
2062 bss_conf->assoc_capability = capab_info;
2063 ieee80211_set_associated(sdata, ifsta);
2064
2065 ieee80211_associated(sdata, ifsta);
2066 }
2067
2068
2069 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
2070 struct ieee80211_if_sta *ifsta,
2071 struct ieee80211_sta_bss *bss)
2072 {
2073 struct ieee80211_local *local = sdata->local;
2074 int res, rates, i, j;
2075 struct sk_buff *skb;
2076 struct ieee80211_mgmt *mgmt;
2077 u8 *pos;
2078 struct ieee80211_supported_band *sband;
2079 union iwreq_data wrqu;
2080
2081 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2082
2083 /* Remove possible STA entries from other IBSS networks. */
2084 sta_info_flush_delayed(sdata);
2085
2086 if (local->ops->reset_tsf) {
2087 /* Reset own TSF to allow time synchronization work. */
2088 local->ops->reset_tsf(local_to_hw(local));
2089 }
2090 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2091 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2092 if (res)
2093 return res;
2094
2095 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2096
2097 sdata->drop_unencrypted = bss->capability &
2098 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2099
2100 res = ieee80211_set_freq(sdata, bss->freq);
2101
2102 if (res)
2103 return res;
2104
2105 /* Build IBSS probe response */
2106 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2107 if (skb) {
2108 skb_reserve(skb, local->hw.extra_tx_headroom);
2109
2110 mgmt = (struct ieee80211_mgmt *)
2111 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2112 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2113 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2114 IEEE80211_STYPE_PROBE_RESP);
2115 memset(mgmt->da, 0xff, ETH_ALEN);
2116 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
2117 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2118 mgmt->u.beacon.beacon_int =
2119 cpu_to_le16(local->hw.conf.beacon_int);
2120 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2121 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2122
2123 pos = skb_put(skb, 2 + ifsta->ssid_len);
2124 *pos++ = WLAN_EID_SSID;
2125 *pos++ = ifsta->ssid_len;
2126 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2127
2128 rates = bss->supp_rates_len;
2129 if (rates > 8)
2130 rates = 8;
2131 pos = skb_put(skb, 2 + rates);
2132 *pos++ = WLAN_EID_SUPP_RATES;
2133 *pos++ = rates;
2134 memcpy(pos, bss->supp_rates, rates);
2135
2136 if (bss->band == IEEE80211_BAND_2GHZ) {
2137 pos = skb_put(skb, 2 + 1);
2138 *pos++ = WLAN_EID_DS_PARAMS;
2139 *pos++ = 1;
2140 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2141 }
2142
2143 pos = skb_put(skb, 2 + 2);
2144 *pos++ = WLAN_EID_IBSS_PARAMS;
2145 *pos++ = 2;
2146 /* FIX: set ATIM window based on scan results */
2147 *pos++ = 0;
2148 *pos++ = 0;
2149
2150 if (bss->supp_rates_len > 8) {
2151 rates = bss->supp_rates_len - 8;
2152 pos = skb_put(skb, 2 + rates);
2153 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2154 *pos++ = rates;
2155 memcpy(pos, &bss->supp_rates[8], rates);
2156 }
2157
2158 ifsta->probe_resp = skb;
2159
2160 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2161 }
2162
2163 rates = 0;
2164 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2165 for (i = 0; i < bss->supp_rates_len; i++) {
2166 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2167 for (j = 0; j < sband->n_bitrates; j++)
2168 if (sband->bitrates[j].bitrate == bitrate)
2169 rates |= BIT(j);
2170 }
2171 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2172
2173 ieee80211_sta_def_wmm_params(sdata, bss, 1);
2174
2175 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
2176 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2177
2178 memset(&wrqu, 0, sizeof(wrqu));
2179 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2180 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
2181
2182 return res;
2183 }
2184
2185 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2186 struct ieee802_11_elems *elems,
2187 enum ieee80211_band band)
2188 {
2189 struct ieee80211_supported_band *sband;
2190 struct ieee80211_rate *bitrates;
2191 size_t num_rates;
2192 u64 supp_rates;
2193 int i, j;
2194 sband = local->hw.wiphy->bands[band];
2195
2196 if (!sband) {
2197 WARN_ON(1);
2198 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2199 }
2200
2201 bitrates = sband->bitrates;
2202 num_rates = sband->n_bitrates;
2203 supp_rates = 0;
2204 for (i = 0; i < elems->supp_rates_len +
2205 elems->ext_supp_rates_len; i++) {
2206 u8 rate = 0;
2207 int own_rate;
2208 if (i < elems->supp_rates_len)
2209 rate = elems->supp_rates[i];
2210 else if (elems->ext_supp_rates)
2211 rate = elems->ext_supp_rates
2212 [i - elems->supp_rates_len];
2213 own_rate = 5 * (rate & 0x7f);
2214 for (j = 0; j < num_rates; j++)
2215 if (bitrates[j].bitrate == own_rate)
2216 supp_rates |= BIT(j);
2217 }
2218 return supp_rates;
2219 }
2220
2221 static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2222 enum ieee80211_band band)
2223 {
2224 struct ieee80211_supported_band *sband;
2225 struct ieee80211_rate *bitrates;
2226 u64 mandatory_rates;
2227 enum ieee80211_rate_flags mandatory_flag;
2228 int i;
2229
2230 sband = local->hw.wiphy->bands[band];
2231 if (!sband) {
2232 WARN_ON(1);
2233 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2234 }
2235
2236 if (band == IEEE80211_BAND_2GHZ)
2237 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2238 else
2239 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2240
2241 bitrates = sband->bitrates;
2242 mandatory_rates = 0;
2243 for (i = 0; i < sband->n_bitrates; i++)
2244 if (bitrates[i].flags & mandatory_flag)
2245 mandatory_rates |= BIT(i);
2246 return mandatory_rates;
2247 }
2248
2249 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2250 struct ieee80211_mgmt *mgmt,
2251 size_t len,
2252 struct ieee80211_rx_status *rx_status,
2253 struct ieee802_11_elems *elems,
2254 bool beacon)
2255 {
2256 struct ieee80211_local *local = sdata->local;
2257 int freq;
2258 struct ieee80211_sta_bss *bss;
2259 struct sta_info *sta;
2260 struct ieee80211_channel *channel;
2261 u64 beacon_timestamp, rx_timestamp;
2262 u64 supp_rates = 0;
2263 enum ieee80211_band band = rx_status->band;
2264 DECLARE_MAC_BUF(mac);
2265 DECLARE_MAC_BUF(mac2);
2266
2267 if (elems->ds_params && elems->ds_params_len == 1)
2268 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2269 else
2270 freq = rx_status->freq;
2271
2272 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2273
2274 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2275 return;
2276
2277 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2278 elems->mesh_config && mesh_matches_local(elems, sdata)) {
2279 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2280
2281 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
2282 mesh_peer_accepts_plinks(elems));
2283 }
2284
2285 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2286 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2287 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2288
2289 rcu_read_lock();
2290
2291 sta = sta_info_get(local, mgmt->sa);
2292 if (sta) {
2293 u64 prev_rates;
2294
2295 prev_rates = sta->supp_rates[band];
2296 /* make sure mandatory rates are always added */
2297 sta->supp_rates[band] = supp_rates |
2298 ieee80211_sta_get_mandatory_rates(local, band);
2299
2300 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2301 if (sta->supp_rates[band] != prev_rates)
2302 printk(KERN_DEBUG "%s: updated supp_rates set "
2303 "for %s based on beacon info (0x%llx | "
2304 "0x%llx -> 0x%llx)\n",
2305 sdata->dev->name, print_mac(mac, sta->addr),
2306 (unsigned long long) prev_rates,
2307 (unsigned long long) supp_rates,
2308 (unsigned long long) sta->supp_rates[band]);
2309 #endif
2310 } else {
2311 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2312 mgmt->sa, supp_rates);
2313 }
2314
2315 rcu_read_unlock();
2316 }
2317
2318 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2319 freq, beacon);
2320 if (!bss)
2321 return;
2322
2323 /* was just updated in ieee80211_bss_info_update */
2324 beacon_timestamp = bss->timestamp;
2325
2326 /*
2327 * In STA mode, the remaining parameters should not be overridden
2328 * by beacons because they're not necessarily accurate there.
2329 */
2330 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2331 bss->last_probe_resp && beacon) {
2332 ieee80211_rx_bss_put(local, bss);
2333 return;
2334 }
2335
2336 /* check if we need to merge IBSS */
2337 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2338 bss->capability & WLAN_CAPABILITY_IBSS &&
2339 bss->freq == local->oper_channel->center_freq &&
2340 elems->ssid_len == sdata->u.sta.ssid_len &&
2341 memcmp(elems->ssid, sdata->u.sta.ssid,
2342 sdata->u.sta.ssid_len) == 0) {
2343 if (rx_status->flag & RX_FLAG_TSFT) {
2344 /* in order for correct IBSS merging we need mactime
2345 *
2346 * since mactime is defined as the time the first data
2347 * symbol of the frame hits the PHY, and the timestamp
2348 * of the beacon is defined as "the time that the data
2349 * symbol containing the first bit of the timestamp is
2350 * transmitted to the PHY plus the transmitting STA’s
2351 * delays through its local PHY from the MAC-PHY
2352 * interface to its interface with the WM"
2353 * (802.11 11.1.2) - equals the time this bit arrives at
2354 * the receiver - we have to take into account the
2355 * offset between the two.
2356 * e.g: at 1 MBit that means mactime is 192 usec earlier
2357 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2358 */
2359 int rate = local->hw.wiphy->bands[band]->
2360 bitrates[rx_status->rate_idx].bitrate;
2361 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2362 } else if (local && local->ops && local->ops->get_tsf)
2363 /* second best option: get current TSF */
2364 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2365 else
2366 /* can't merge without knowing the TSF */
2367 rx_timestamp = -1LLU;
2368 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2369 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2370 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2371 print_mac(mac, mgmt->sa),
2372 print_mac(mac2, mgmt->bssid),
2373 (unsigned long long)rx_timestamp,
2374 (unsigned long long)beacon_timestamp,
2375 (unsigned long long)(rx_timestamp - beacon_timestamp),
2376 jiffies);
2377 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2378 if (beacon_timestamp > rx_timestamp) {
2379 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2380 printk(KERN_DEBUG "%s: beacon TSF higher than "
2381 "local TSF - IBSS merge with BSSID %s\n",
2382 sdata->dev->name, print_mac(mac, mgmt->bssid));
2383 #endif
2384 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2385 ieee80211_ibss_add_sta(sdata, NULL,
2386 mgmt->bssid, mgmt->sa,
2387 supp_rates);
2388 }
2389 }
2390
2391 ieee80211_rx_bss_put(local, bss);
2392 }
2393
2394
2395 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2396 struct ieee80211_mgmt *mgmt,
2397 size_t len,
2398 struct ieee80211_rx_status *rx_status)
2399 {
2400 size_t baselen;
2401 struct ieee802_11_elems elems;
2402 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2403
2404 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2405 return; /* ignore ProbeResp to foreign address */
2406
2407 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2408 if (baselen > len)
2409 return;
2410
2411 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2412 &elems);
2413
2414 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
2415
2416 /* direct probe may be part of the association flow */
2417 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2418 &ifsta->request)) {
2419 printk(KERN_DEBUG "%s direct probe responded\n",
2420 sdata->dev->name);
2421 ieee80211_authenticate(sdata, ifsta);
2422 }
2423 }
2424
2425
2426 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2427 struct ieee80211_mgmt *mgmt,
2428 size_t len,
2429 struct ieee80211_rx_status *rx_status)
2430 {
2431 struct ieee80211_if_sta *ifsta;
2432 size_t baselen;
2433 struct ieee802_11_elems elems;
2434 struct ieee80211_local *local = sdata->local;
2435 struct ieee80211_conf *conf = &local->hw.conf;
2436 u32 changed = 0;
2437
2438 /* Process beacon from the current BSS */
2439 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2440 if (baselen > len)
2441 return;
2442
2443 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2444
2445 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
2446
2447 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2448 return;
2449 ifsta = &sdata->u.sta;
2450
2451 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2452 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2453 return;
2454
2455 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2456 elems.wmm_param_len);
2457
2458 if (elems.erp_info && elems.erp_info_len >= 1)
2459 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2460 else {
2461 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2462 changed |= ieee80211_handle_protect_preamb(sdata, false,
2463 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2464 }
2465
2466 if (elems.ht_cap_elem && elems.ht_info_elem &&
2467 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2468 struct ieee80211_ht_bss_info bss_info;
2469
2470 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2471 (struct ieee80211_ht_addt_info *)
2472 elems.ht_info_elem, &bss_info);
2473 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2474 &bss_info);
2475 }
2476
2477 ieee80211_bss_info_change_notify(sdata, changed);
2478 }
2479
2480
2481 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
2482 struct ieee80211_if_sta *ifsta,
2483 struct ieee80211_mgmt *mgmt,
2484 size_t len,
2485 struct ieee80211_rx_status *rx_status)
2486 {
2487 struct ieee80211_local *local = sdata->local;
2488 int tx_last_beacon;
2489 struct sk_buff *skb;
2490 struct ieee80211_mgmt *resp;
2491 u8 *pos, *end;
2492 DECLARE_MAC_BUF(mac);
2493 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2494 DECLARE_MAC_BUF(mac2);
2495 DECLARE_MAC_BUF(mac3);
2496 #endif
2497
2498 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2499 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
2500 len < 24 + 2 || !ifsta->probe_resp)
2501 return;
2502
2503 if (local->ops->tx_last_beacon)
2504 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2505 else
2506 tx_last_beacon = 1;
2507
2508 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2509 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2510 "%s (tx_last_beacon=%d)\n",
2511 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2512 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2513 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2514
2515 if (!tx_last_beacon)
2516 return;
2517
2518 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2519 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2520 return;
2521
2522 end = ((u8 *) mgmt) + len;
2523 pos = mgmt->u.probe_req.variable;
2524 if (pos[0] != WLAN_EID_SSID ||
2525 pos + 2 + pos[1] > end) {
2526 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2527 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2528 "from %s\n",
2529 sdata->dev->name, print_mac(mac, mgmt->sa));
2530 #endif
2531 return;
2532 }
2533 if (pos[1] != 0 &&
2534 (pos[1] != ifsta->ssid_len ||
2535 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2536 /* Ignore ProbeReq for foreign SSID */
2537 return;
2538 }
2539
2540 /* Reply with ProbeResp */
2541 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2542 if (!skb)
2543 return;
2544
2545 resp = (struct ieee80211_mgmt *) skb->data;
2546 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2547 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2548 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2549 sdata->dev->name, print_mac(mac, resp->da));
2550 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2551 ieee80211_sta_tx(sdata, skb, 0);
2552 }
2553
2554 static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2555 struct ieee80211_if_sta *ifsta,
2556 struct ieee80211_mgmt *mgmt,
2557 size_t len,
2558 struct ieee80211_rx_status *rx_status)
2559 {
2560 struct ieee80211_local *local = sdata->local;
2561
2562 /* all categories we currently handle have action_code */
2563 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
2564 return;
2565
2566 switch (mgmt->u.action.category) {
2567 case WLAN_CATEGORY_SPECTRUM_MGMT:
2568 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2569 break;
2570 switch (mgmt->u.action.u.measurement.action_code) {
2571 case WLAN_ACTION_SPCT_MSR_REQ:
2572 if (len < (IEEE80211_MIN_ACTION_SIZE +
2573 sizeof(mgmt->u.action.u.measurement)))
2574 break;
2575 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
2576 break;
2577 }
2578 break;
2579 case WLAN_CATEGORY_BACK:
2580 switch (mgmt->u.action.u.addba_req.action_code) {
2581 case WLAN_ACTION_ADDBA_REQ:
2582 if (len < (IEEE80211_MIN_ACTION_SIZE +
2583 sizeof(mgmt->u.action.u.addba_req)))
2584 break;
2585 ieee80211_sta_process_addba_request(local, mgmt, len);
2586 break;
2587 case WLAN_ACTION_ADDBA_RESP:
2588 if (len < (IEEE80211_MIN_ACTION_SIZE +
2589 sizeof(mgmt->u.action.u.addba_resp)))
2590 break;
2591 ieee80211_sta_process_addba_resp(local, mgmt, len);
2592 break;
2593 case WLAN_ACTION_DELBA:
2594 if (len < (IEEE80211_MIN_ACTION_SIZE +
2595 sizeof(mgmt->u.action.u.delba)))
2596 break;
2597 ieee80211_sta_process_delba(sdata, mgmt, len);
2598 break;
2599 }
2600 break;
2601 case PLINK_CATEGORY:
2602 if (ieee80211_vif_is_mesh(&sdata->vif))
2603 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
2604 break;
2605 case MESH_PATH_SEL_CATEGORY:
2606 if (ieee80211_vif_is_mesh(&sdata->vif))
2607 mesh_rx_path_sel_frame(sdata, mgmt, len);
2608 break;
2609 }
2610 }
2611
2612 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
2613 struct ieee80211_rx_status *rx_status)
2614 {
2615 struct ieee80211_local *local = sdata->local;
2616 struct ieee80211_if_sta *ifsta;
2617 struct ieee80211_mgmt *mgmt;
2618 u16 fc;
2619
2620 if (skb->len < 24)
2621 goto fail;
2622
2623 ifsta = &sdata->u.sta;
2624
2625 mgmt = (struct ieee80211_mgmt *) skb->data;
2626 fc = le16_to_cpu(mgmt->frame_control);
2627
2628 switch (fc & IEEE80211_FCTL_STYPE) {
2629 case IEEE80211_STYPE_PROBE_REQ:
2630 case IEEE80211_STYPE_PROBE_RESP:
2631 case IEEE80211_STYPE_BEACON:
2632 case IEEE80211_STYPE_ACTION:
2633 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2634 case IEEE80211_STYPE_AUTH:
2635 case IEEE80211_STYPE_ASSOC_RESP:
2636 case IEEE80211_STYPE_REASSOC_RESP:
2637 case IEEE80211_STYPE_DEAUTH:
2638 case IEEE80211_STYPE_DISASSOC:
2639 skb_queue_tail(&ifsta->skb_queue, skb);
2640 queue_work(local->hw.workqueue, &ifsta->work);
2641 return;
2642 }
2643
2644 fail:
2645 kfree_skb(skb);
2646 }
2647
2648 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2649 struct sk_buff *skb)
2650 {
2651 struct ieee80211_rx_status *rx_status;
2652 struct ieee80211_if_sta *ifsta;
2653 struct ieee80211_mgmt *mgmt;
2654 u16 fc;
2655
2656 ifsta = &sdata->u.sta;
2657
2658 rx_status = (struct ieee80211_rx_status *) skb->cb;
2659 mgmt = (struct ieee80211_mgmt *) skb->data;
2660 fc = le16_to_cpu(mgmt->frame_control);
2661
2662 switch (fc & IEEE80211_FCTL_STYPE) {
2663 case IEEE80211_STYPE_PROBE_REQ:
2664 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
2665 rx_status);
2666 break;
2667 case IEEE80211_STYPE_PROBE_RESP:
2668 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
2669 break;
2670 case IEEE80211_STYPE_BEACON:
2671 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2672 break;
2673 case IEEE80211_STYPE_AUTH:
2674 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
2675 break;
2676 case IEEE80211_STYPE_ASSOC_RESP:
2677 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2678 break;
2679 case IEEE80211_STYPE_REASSOC_RESP:
2680 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2681 break;
2682 case IEEE80211_STYPE_DEAUTH:
2683 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
2684 break;
2685 case IEEE80211_STYPE_DISASSOC:
2686 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
2687 break;
2688 case IEEE80211_STYPE_ACTION:
2689 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
2690 break;
2691 }
2692
2693 kfree_skb(skb);
2694 }
2695
2696
2697 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
2698 {
2699 struct ieee80211_local *local = sdata->local;
2700 int active = 0;
2701 struct sta_info *sta;
2702
2703 rcu_read_lock();
2704
2705 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2706 if (sta->sdata == sdata &&
2707 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2708 jiffies)) {
2709 active++;
2710 break;
2711 }
2712 }
2713
2714 rcu_read_unlock();
2715
2716 return active;
2717 }
2718
2719
2720 static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
2721 {
2722 struct ieee80211_local *local = sdata->local;
2723 struct sta_info *sta, *tmp;
2724 LIST_HEAD(tmp_list);
2725 DECLARE_MAC_BUF(mac);
2726 unsigned long flags;
2727
2728 spin_lock_irqsave(&local->sta_lock, flags);
2729 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2730 if (time_after(jiffies, sta->last_rx + exp_time)) {
2731 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2732 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2733 sdata->dev->name, print_mac(mac, sta->addr));
2734 #endif
2735 __sta_info_unlink(&sta);
2736 if (sta)
2737 list_add(&sta->list, &tmp_list);
2738 }
2739 spin_unlock_irqrestore(&local->sta_lock, flags);
2740
2741 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2742 sta_info_destroy(sta);
2743 }
2744
2745
2746 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
2747 struct ieee80211_if_sta *ifsta)
2748 {
2749 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2750
2751 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2752 if (ieee80211_sta_active_ibss(sdata))
2753 return;
2754
2755 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2756 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2757 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
2758 }
2759
2760
2761 #ifdef CONFIG_MAC80211_MESH
2762 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
2763 struct ieee80211_if_sta *ifsta)
2764 {
2765 bool free_plinks;
2766
2767 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
2768 mesh_path_expire(sdata);
2769
2770 free_plinks = mesh_plink_availables(sdata);
2771 if (free_plinks != sdata->u.sta.accepting_plinks)
2772 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2773
2774 mod_timer(&ifsta->timer, jiffies +
2775 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
2776 }
2777
2778
2779 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
2780 {
2781 struct ieee80211_if_sta *ifsta;
2782 ifsta = &sdata->u.sta;
2783 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
2784 ieee80211_sta_timer((unsigned long)sdata);
2785 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2786 }
2787 #endif
2788
2789
2790 void ieee80211_sta_timer(unsigned long data)
2791 {
2792 struct ieee80211_sub_if_data *sdata =
2793 (struct ieee80211_sub_if_data *) data;
2794 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2795 struct ieee80211_local *local = sdata->local;
2796
2797 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2798 queue_work(local->hw.workqueue, &ifsta->work);
2799 }
2800
2801 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
2802 struct ieee80211_if_sta *ifsta)
2803 {
2804 struct ieee80211_local *local = sdata->local;
2805
2806 if (local->ops->reset_tsf) {
2807 /* Reset own TSF to allow time synchronization work. */
2808 local->ops->reset_tsf(local_to_hw(local));
2809 }
2810
2811 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2812
2813
2814 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2815 ifsta->auth_alg = WLAN_AUTH_OPEN;
2816 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2817 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2818 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2819 ifsta->auth_alg = WLAN_AUTH_LEAP;
2820 else
2821 ifsta->auth_alg = WLAN_AUTH_OPEN;
2822 ifsta->auth_transaction = -1;
2823 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2824 ifsta->assoc_scan_tries = 0;
2825 ifsta->direct_probe_tries = 0;
2826 ifsta->auth_tries = 0;
2827 ifsta->assoc_tries = 0;
2828 netif_tx_stop_all_queues(sdata->dev);
2829 netif_carrier_off(sdata->dev);
2830 }
2831
2832
2833 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2834 struct ieee80211_if_sta *ifsta)
2835 {
2836 struct ieee80211_local *local = sdata->local;
2837
2838 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2839 return;
2840
2841 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2842 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2843 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2844 IEEE80211_STA_AUTO_SSID_SEL))) {
2845
2846 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2847 ieee80211_set_disassoc(sdata, ifsta, true, true,
2848 WLAN_REASON_DEAUTH_LEAVING);
2849
2850 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2851 queue_work(local->hw.workqueue, &ifsta->work);
2852 }
2853 }
2854
2855 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2856 const char *ssid, int ssid_len)
2857 {
2858 int tmp, hidden_ssid;
2859
2860 if (ssid_len == ifsta->ssid_len &&
2861 !memcmp(ifsta->ssid, ssid, ssid_len))
2862 return 1;
2863
2864 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2865 return 0;
2866
2867 hidden_ssid = 1;
2868 tmp = ssid_len;
2869 while (tmp--) {
2870 if (ssid[tmp] != '\0') {
2871 hidden_ssid = 0;
2872 break;
2873 }
2874 }
2875
2876 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2877 return 1;
2878
2879 if (ssid_len == 1 && ssid[0] == ' ')
2880 return 1;
2881
2882 return 0;
2883 }
2884
2885 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
2886 struct ieee80211_if_sta *ifsta)
2887 {
2888 struct ieee80211_local *local = sdata->local;
2889 struct ieee80211_sta_bss *bss;
2890 struct ieee80211_supported_band *sband;
2891 u8 bssid[ETH_ALEN], *pos;
2892 int i;
2893 int ret;
2894 DECLARE_MAC_BUF(mac);
2895
2896 #if 0
2897 /* Easier testing, use fixed BSSID. */
2898 memset(bssid, 0xfe, ETH_ALEN);
2899 #else
2900 /* Generate random, not broadcast, locally administered BSSID. Mix in
2901 * own MAC address to make sure that devices that do not have proper
2902 * random number generator get different BSSID. */
2903 get_random_bytes(bssid, ETH_ALEN);
2904 for (i = 0; i < ETH_ALEN; i++)
2905 bssid[i] ^= sdata->dev->dev_addr[i];
2906 bssid[0] &= ~0x01;
2907 bssid[0] |= 0x02;
2908 #endif
2909
2910 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2911 sdata->dev->name, print_mac(mac, bssid));
2912
2913 bss = ieee80211_rx_bss_add(local, bssid,
2914 local->hw.conf.channel->center_freq,
2915 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2916 if (!bss)
2917 return -ENOMEM;
2918
2919 bss->band = local->hw.conf.channel->band;
2920 sband = local->hw.wiphy->bands[bss->band];
2921
2922 if (local->hw.conf.beacon_int == 0)
2923 local->hw.conf.beacon_int = 100;
2924 bss->beacon_int = local->hw.conf.beacon_int;
2925 bss->last_update = jiffies;
2926 bss->capability = WLAN_CAPABILITY_IBSS;
2927
2928 if (sdata->default_key)
2929 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2930 else
2931 sdata->drop_unencrypted = 0;
2932
2933 bss->supp_rates_len = sband->n_bitrates;
2934 pos = bss->supp_rates;
2935 for (i = 0; i < sband->n_bitrates; i++) {
2936 int rate = sband->bitrates[i].bitrate;
2937 *pos++ = (u8) (rate / 5);
2938 }
2939
2940 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
2941 ieee80211_rx_bss_put(local, bss);
2942 return ret;
2943 }
2944
2945
2946 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
2947 struct ieee80211_if_sta *ifsta)
2948 {
2949 struct ieee80211_local *local = sdata->local;
2950 struct ieee80211_sta_bss *bss;
2951 int found = 0;
2952 u8 bssid[ETH_ALEN];
2953 int active_ibss;
2954 DECLARE_MAC_BUF(mac);
2955 DECLARE_MAC_BUF(mac2);
2956
2957 if (ifsta->ssid_len == 0)
2958 return -EINVAL;
2959
2960 active_ibss = ieee80211_sta_active_ibss(sdata);
2961 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2962 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2963 sdata->dev->name, active_ibss);
2964 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2965 spin_lock_bh(&local->sta_bss_lock);
2966 list_for_each_entry(bss, &local->sta_bss_list, list) {
2967 if (ifsta->ssid_len != bss->ssid_len ||
2968 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2969 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2970 continue;
2971 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2972 printk(KERN_DEBUG " bssid=%s found\n",
2973 print_mac(mac, bss->bssid));
2974 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2975 memcpy(bssid, bss->bssid, ETH_ALEN);
2976 found = 1;
2977 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2978 break;
2979 }
2980 spin_unlock_bh(&local->sta_bss_lock);
2981
2982 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2983 if (found)
2984 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2985 "%s\n", print_mac(mac, bssid),
2986 print_mac(mac2, ifsta->bssid));
2987 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2988
2989 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2990 int ret;
2991 int search_freq;
2992
2993 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2994 search_freq = bss->freq;
2995 else
2996 search_freq = local->hw.conf.channel->center_freq;
2997
2998 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
2999 ifsta->ssid, ifsta->ssid_len);
3000 if (!bss)
3001 goto dont_join;
3002
3003 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3004 " based on configured SSID\n",
3005 sdata->dev->name, print_mac(mac, bssid));
3006 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3007 ieee80211_rx_bss_put(local, bss);
3008 return ret;
3009 }
3010
3011 dont_join:
3012 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3013 printk(KERN_DEBUG " did not try to join ibss\n");
3014 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3015
3016 /* Selected IBSS not found in current scan results - try to scan */
3017 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
3018 !ieee80211_sta_active_ibss(sdata)) {
3019 mod_timer(&ifsta->timer, jiffies +
3020 IEEE80211_IBSS_MERGE_INTERVAL);
3021 } else if (time_after(jiffies, local->last_scan_completed +
3022 IEEE80211_SCAN_INTERVAL)) {
3023 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3024 "join\n", sdata->dev->name);
3025 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
3026 ifsta->ssid_len);
3027 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
3028 int interval = IEEE80211_SCAN_INTERVAL;
3029
3030 if (time_after(jiffies, ifsta->ibss_join_req +
3031 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3032 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3033 (!(local->oper_channel->flags &
3034 IEEE80211_CHAN_NO_IBSS)))
3035 return ieee80211_sta_create_ibss(sdata, ifsta);
3036 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3037 printk(KERN_DEBUG "%s: IBSS not allowed on"
3038 " %d MHz\n", sdata->dev->name,
3039 local->hw.conf.channel->center_freq);
3040 }
3041
3042 /* No IBSS found - decrease scan interval and continue
3043 * scanning. */
3044 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3045 }
3046
3047 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3048 mod_timer(&ifsta->timer, jiffies + interval);
3049 return 0;
3050 }
3051
3052 return 0;
3053 }
3054
3055
3056 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
3057 {
3058 struct ieee80211_if_sta *ifsta;
3059 int res;
3060
3061 if (len > IEEE80211_MAX_SSID_LEN)
3062 return -EINVAL;
3063
3064 ifsta = &sdata->u.sta;
3065
3066 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3067 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3068 memcpy(ifsta->ssid, ssid, len);
3069 ifsta->ssid_len = len;
3070 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3071
3072 res = 0;
3073 /*
3074 * Hack! MLME code needs to be cleaned up to have different
3075 * entry points for configuration and internal selection change
3076 */
3077 if (netif_running(sdata->dev))
3078 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3079 if (res) {
3080 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3081 "the low-level driver\n", sdata->dev->name);
3082 return res;
3083 }
3084 }
3085
3086 if (len)
3087 ifsta->flags |= IEEE80211_STA_SSID_SET;
3088 else
3089 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3090
3091 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3092 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3093 ifsta->ibss_join_req = jiffies;
3094 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
3095 return ieee80211_sta_find_ibss(sdata, ifsta);
3096 }
3097
3098 return 0;
3099 }
3100
3101
3102 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
3103 {
3104 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3105 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3106 *len = ifsta->ssid_len;
3107 return 0;
3108 }
3109
3110
3111 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
3112 {
3113 struct ieee80211_if_sta *ifsta;
3114 int res;
3115
3116 ifsta = &sdata->u.sta;
3117
3118 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3119 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3120 res = 0;
3121 /*
3122 * Hack! See also ieee80211_sta_set_ssid.
3123 */
3124 if (netif_running(sdata->dev))
3125 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3126 if (res) {
3127 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3128 "the low-level driver\n", sdata->dev->name);
3129 return res;
3130 }
3131 }
3132
3133 if (is_valid_ether_addr(bssid))
3134 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3135 else
3136 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3137
3138 return 0;
3139 }
3140
3141
3142 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
3143 {
3144 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3145
3146 kfree(ifsta->extra_ie);
3147 if (len == 0) {
3148 ifsta->extra_ie = NULL;
3149 ifsta->extra_ie_len = 0;
3150 return 0;
3151 }
3152 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3153 if (!ifsta->extra_ie) {
3154 ifsta->extra_ie_len = 0;
3155 return -ENOMEM;
3156 }
3157 memcpy(ifsta->extra_ie, ie, len);
3158 ifsta->extra_ie_len = len;
3159 return 0;
3160 }
3161
3162
3163 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
3164 struct sk_buff *skb, u8 *bssid,
3165 u8 *addr, u64 supp_rates)
3166 {
3167 struct ieee80211_local *local = sdata->local;
3168 struct sta_info *sta;
3169 DECLARE_MAC_BUF(mac);
3170 int band = local->hw.conf.channel->band;
3171
3172 /* TODO: Could consider removing the least recently used entry and
3173 * allow new one to be added. */
3174 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3175 if (net_ratelimit()) {
3176 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3177 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
3178 }
3179 return NULL;
3180 }
3181
3182 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
3183 return NULL;
3184
3185 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
3186 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3187 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
3188 #endif
3189
3190 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
3191 if (!sta)
3192 return NULL;
3193
3194 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
3195
3196 /* make sure mandatory rates are always added */
3197 sta->supp_rates[band] = supp_rates |
3198 ieee80211_sta_get_mandatory_rates(local, band);
3199
3200 rate_control_rate_init(sta, local);
3201
3202 if (sta_info_insert(sta))
3203 return NULL;
3204
3205 return sta;
3206 }
3207
3208
3209 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3210 struct ieee80211_if_sta *ifsta)
3211 {
3212 struct ieee80211_local *local = sdata->local;
3213 struct ieee80211_sta_bss *bss, *selected = NULL;
3214 int top_rssi = 0, freq;
3215
3216 spin_lock_bh(&local->sta_bss_lock);
3217 freq = local->oper_channel->center_freq;
3218 list_for_each_entry(bss, &local->sta_bss_list, list) {
3219 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3220 continue;
3221
3222 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3223 IEEE80211_STA_AUTO_BSSID_SEL |
3224 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3225 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3226 !!sdata->default_key))
3227 continue;
3228
3229 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3230 bss->freq != freq)
3231 continue;
3232
3233 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3234 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3235 continue;
3236
3237 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3238 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3239 continue;
3240
3241 if (!selected || top_rssi < bss->signal) {
3242 selected = bss;
3243 top_rssi = bss->signal;
3244 }
3245 }
3246 if (selected)
3247 atomic_inc(&selected->users);
3248 spin_unlock_bh(&local->sta_bss_lock);
3249
3250 if (selected) {
3251 ieee80211_set_freq(sdata, selected->freq);
3252 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3253 ieee80211_sta_set_ssid(sdata, selected->ssid,
3254 selected->ssid_len);
3255 ieee80211_sta_set_bssid(sdata, selected->bssid);
3256 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3257
3258 /* Send out direct probe if no probe resp was received or
3259 * the one we have is outdated
3260 */
3261 if (!selected->last_probe_resp ||
3262 time_after(jiffies, selected->last_probe_resp
3263 + IEEE80211_SCAN_RESULT_EXPIRE))
3264 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3265 else
3266 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3267
3268 ieee80211_rx_bss_put(local, selected);
3269 ieee80211_sta_reset_auth(sdata, ifsta);
3270 return 0;
3271 } else {
3272 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3273 ifsta->assoc_scan_tries++;
3274 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3275 ieee80211_sta_start_scan(sdata, NULL, 0);
3276 else
3277 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3278 ifsta->ssid_len);
3279 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3280 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3281 } else
3282 ifsta->state = IEEE80211_STA_MLME_DISABLED;
3283 }
3284 return -1;
3285 }
3286
3287
3288 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
3289 {
3290 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3291
3292 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
3293 sdata->dev->name, reason);
3294
3295 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3296 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3297 return -EINVAL;
3298
3299 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
3300 return 0;
3301 }
3302
3303
3304 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
3305 {
3306 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3307
3308 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
3309 sdata->dev->name, reason);
3310
3311 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3312 return -EINVAL;
3313
3314 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3315 return -1;
3316
3317 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
3318 return 0;
3319 }
3320
3321 void ieee80211_notify_mac(struct ieee80211_hw *hw,
3322 enum ieee80211_notification_types notif_type)
3323 {
3324 struct ieee80211_local *local = hw_to_local(hw);
3325 struct ieee80211_sub_if_data *sdata;
3326
3327 switch (notif_type) {
3328 case IEEE80211_NOTIFY_RE_ASSOC:
3329 rcu_read_lock();
3330 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3331 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3332 continue;
3333
3334 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
3335 }
3336 rcu_read_unlock();
3337 break;
3338 }
3339 }
3340 EXPORT_SYMBOL(ieee80211_notify_mac);
3341
3342 void ieee80211_sta_work(struct work_struct *work)
3343 {
3344 struct ieee80211_sub_if_data *sdata =
3345 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3346 struct ieee80211_local *local = sdata->local;
3347 struct ieee80211_if_sta *ifsta;
3348 struct sk_buff *skb;
3349
3350 if (!netif_running(sdata->dev))
3351 return;
3352
3353 if (local->sta_sw_scanning || local->sta_hw_scanning)
3354 return;
3355
3356 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3357 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3358 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3359 return;
3360 ifsta = &sdata->u.sta;
3361
3362 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3363 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3364
3365 #ifdef CONFIG_MAC80211_MESH
3366 if (ifsta->preq_queue_len &&
3367 time_after(jiffies,
3368 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3369 mesh_path_start_discovery(sdata);
3370 #endif
3371
3372 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3373 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3374 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3375 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3376 if (ifsta->scan_ssid_len)
3377 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3378 else
3379 ieee80211_sta_start_scan(sdata, NULL, 0);
3380 return;
3381 }
3382
3383 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3384 if (ieee80211_sta_config_auth(sdata, ifsta))
3385 return;
3386 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3387 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3388 return;
3389
3390 switch (ifsta->state) {
3391 case IEEE80211_STA_MLME_DISABLED:
3392 break;
3393 case IEEE80211_STA_MLME_DIRECT_PROBE:
3394 ieee80211_direct_probe(sdata, ifsta);
3395 break;
3396 case IEEE80211_STA_MLME_AUTHENTICATE:
3397 ieee80211_authenticate(sdata, ifsta);
3398 break;
3399 case IEEE80211_STA_MLME_ASSOCIATE:
3400 ieee80211_associate(sdata, ifsta);
3401 break;
3402 case IEEE80211_STA_MLME_ASSOCIATED:
3403 ieee80211_associated(sdata, ifsta);
3404 break;
3405 case IEEE80211_STA_MLME_IBSS_SEARCH:
3406 ieee80211_sta_find_ibss(sdata, ifsta);
3407 break;
3408 case IEEE80211_STA_MLME_IBSS_JOINED:
3409 ieee80211_sta_merge_ibss(sdata, ifsta);
3410 break;
3411 #ifdef CONFIG_MAC80211_MESH
3412 case IEEE80211_STA_MLME_MESH_UP:
3413 ieee80211_mesh_housekeeping(sdata, ifsta);
3414 break;
3415 #endif
3416 default:
3417 WARN_ON(1);
3418 break;
3419 }
3420
3421 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3422 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3423 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3424
3425 ieee80211_set_disassoc(sdata, ifsta, false, true,
3426 WLAN_REASON_UNSPECIFIED);
3427 }
3428 }
3429
3430 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3431 {
3432 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3433 struct ieee80211_if_sta *ifsta;
3434
3435 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3436 ifsta = &sdata->u.sta;
3437 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3438 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3439 !ieee80211_sta_active_ibss(sdata)))
3440 ieee80211_sta_find_ibss(sdata, ifsta);
3441 }
3442 }
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