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mac80211: fix action frame length checks
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
d0709a65 27#include <linux/rtnetlink.h>
f0706e82
JB		 28#include <net/iw_handler.h>
29#include <asm/types.h>
f0706e82
JB		 30
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
2c8dccc7
JB		 33#include "rate.h"
34#include "led.h"
f709fc69 35#include "mesh.h"
f0706e82 36
6042a3e3 37#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 38#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
39#define IEEE80211_AUTH_MAX_TRIES 3
40#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
41#define IEEE80211_ASSOC_MAX_TRIES 3
42#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
f709fc69 43#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
f0706e82
JB		 44#define IEEE80211_PROBE_INTERVAL (60 * HZ)
45#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
46#define IEEE80211_SCAN_INTERVAL (2 * HZ)
47#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 48#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82
JB		 49
50#define IEEE80211_PROBE_DELAY (HZ / 33)
51#define IEEE80211_CHANNEL_TIME (HZ / 33)
52#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
53#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
54#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
55#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 56#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 57
58#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
59
60
f0706e82
JB		 61#define ERP_INFO_USE_PROTECTION BIT(1)
62
9c80d3dc 63/* mgmt header + 1 byte category code */
9f985b0e
RR		 64#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
65
66#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
67#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
68#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 69#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
70#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 71
07db2183
RR		 72/* next values represent the buffer size for A-MPDU frame.
73 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
74#define IEEE80211_MIN_AMPDU_BUF 0x8
75#define IEEE80211_MAX_AMPDU_BUF 0x40
76
f698d856 77static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
f0706e82
JB		 78 u8 *ssid, size_t ssid_len);
79static struct ieee80211_sta_bss *
f698d856 80ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
cffdd30d 81 u8 *ssid, u8 ssid_len);
3e122be0 82static void ieee80211_rx_bss_put(struct ieee80211_local *local,
f0706e82 83 struct ieee80211_sta_bss *bss);
f698d856 84static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82 85 struct ieee80211_if_sta *ifsta);
f698d856
JBG		 86static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata);
87static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata,
f0706e82 88 u8 *ssid, size_t ssid_len);
f698d856 89static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
f0706e82 90 struct ieee80211_if_sta *ifsta);
712590de 91static void sta_rx_agg_session_timer_expired(unsigned long data);
f0706e82
JB		 92
93
ee385855
LCC		 94void ieee802_11_parse_elems(u8 *start, size_t len,
95 struct ieee802_11_elems *elems)
f0706e82
JB		 96{
97 size_t left = len;
98 u8 *pos = start;
f0706e82
JB		 99
100 memset(elems, 0, sizeof(*elems));
43ac2ca3
JM		 101 elems->ie_start = start;
102 elems->total_len = len;
f0706e82
JB		 103
104 while (left >= 2) {
105 u8 id, elen;
106
107 id = *pos++;
108 elen = *pos++;
109 left -= 2;
110
67a4cce4
JL		 111 if (elen > left)
112 return;
f0706e82
JB		 113
114 switch (id) {
115 case WLAN_EID_SSID:
116 elems->ssid = pos;
117 elems->ssid_len = elen;
118 break;
119 case WLAN_EID_SUPP_RATES:
120 elems->supp_rates = pos;
121 elems->supp_rates_len = elen;
122 break;
123 case WLAN_EID_FH_PARAMS:
124 elems->fh_params = pos;
125 elems->fh_params_len = elen;
126 break;
127 case WLAN_EID_DS_PARAMS:
128 elems->ds_params = pos;
129 elems->ds_params_len = elen;
130 break;
131 case WLAN_EID_CF_PARAMS:
132 elems->cf_params = pos;
133 elems->cf_params_len = elen;
134 break;
135 case WLAN_EID_TIM:
136 elems->tim = pos;
137 elems->tim_len = elen;
138 break;
139 case WLAN_EID_IBSS_PARAMS:
140 elems->ibss_params = pos;
141 elems->ibss_params_len = elen;
142 break;
143 case WLAN_EID_CHALLENGE:
144 elems->challenge = pos;
145 elems->challenge_len = elen;
146 break;
147 case WLAN_EID_WPA:
148 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
149 pos[2] == 0xf2) {
150 /* Microsoft OUI (00:50:F2) */
151 if (pos[3] == 1) {
152 /* OUI Type 1 - WPA IE */
153 elems->wpa = pos;
154 elems->wpa_len = elen;
155 } else if (elen >= 5 && pos[3] == 2) {
156 if (pos[4] == 0) {
157 elems->wmm_info = pos;
158 elems->wmm_info_len = elen;
159 } else if (pos[4] == 1) {
160 elems->wmm_param = pos;
161 elems->wmm_param_len = elen;
162 }
163 }
164 }
165 break;
166 case WLAN_EID_RSN:
167 elems->rsn = pos;
168 elems->rsn_len = elen;
169 break;
170 case WLAN_EID_ERP_INFO:
171 elems->erp_info = pos;
172 elems->erp_info_len = elen;
173 break;
174 case WLAN_EID_EXT_SUPP_RATES:
175 elems->ext_supp_rates = pos;
176 elems->ext_supp_rates_len = elen;
177 break;
c7153508
RR		 178 case WLAN_EID_HT_CAPABILITY:
179 elems->ht_cap_elem = pos;
180 elems->ht_cap_elem_len = elen;
181 break;
182 case WLAN_EID_HT_EXTRA_INFO:
183 elems->ht_info_elem = pos;
184 elems->ht_info_elem_len = elen;
185 break;
ee385855
LCC		 186 case WLAN_EID_MESH_ID:
187 elems->mesh_id = pos;
188 elems->mesh_id_len = elen;
189 break;
190 case WLAN_EID_MESH_CONFIG:
191 elems->mesh_config = pos;
192 elems->mesh_config_len = elen;
193 break;
194 case WLAN_EID_PEER_LINK:
195 elems->peer_link = pos;
196 elems->peer_link_len = elen;
197 break;
198 case WLAN_EID_PREQ:
199 elems->preq = pos;
200 elems->preq_len = elen;
201 break;
202 case WLAN_EID_PREP:
203 elems->prep = pos;
204 elems->prep_len = elen;
205 break;
206 case WLAN_EID_PERR:
207 elems->perr = pos;
208 elems->perr_len = elen;
209 break;
f2df3859
AK		 210 case WLAN_EID_CHANNEL_SWITCH:
211 elems->ch_switch_elem = pos;
212 elems->ch_switch_elem_len = elen;
213 break;
214 case WLAN_EID_QUIET:
215 if (!elems->quiet_elem) {
216 elems->quiet_elem = pos;
217 elems->quiet_elem_len = elen;
218 }
219 elems->num_of_quiet_elem++;
220 break;
221 case WLAN_EID_COUNTRY:
222 elems->country_elem = pos;
223 elems->country_elem_len = elen;
224 break;
225 case WLAN_EID_PWR_CONSTRAINT:
226 elems->pwr_constr_elem = pos;
227 elems->pwr_constr_elem_len = elen;
228 break;
f0706e82 229 default:
f0706e82
JB		 230 break;
231 }
232
233 left -= elen;
234 pos += elen;
235 }
f0706e82
JB		 236}
237
238
43ac2ca3
JM		 239static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
240{
241 u8 *end, *pos;
242
243 pos = bss->ies;
244 if (pos == NULL)
245 return NULL;
246 end = pos + bss->ies_len;
247
248 while (pos + 1 < end) {
249 if (pos + 2 + pos[1] > end)
250 break;
251 if (pos[0] == ie)
252 return pos;
253 pos += 2 + pos[1];
254 }
255
256 return NULL;
257}
258
259
f0706e82
JB		 260static int ecw2cw(int ecw)
261{
ac2bf324 262 return (1 << ecw) - 1;
f0706e82
JB		 263}
264
e2839d8f 265
f698d856 266static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
e2839d8f
VK		 267 struct ieee80211_sta_bss *bss,
268 int ibss)
269{
e2839d8f
VK		 270 struct ieee80211_local *local = sdata->local;
271 int i, have_higher_than_11mbit = 0;
272
273
274 /* cf. IEEE 802.11 9.2.12 */
275 for (i = 0; i < bss->supp_rates_len; i++)
276 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
277 have_higher_than_11mbit = 1;
278
279 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
280 have_higher_than_11mbit)
281 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
282 else
283 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
284
285
286 if (local->ops->conf_tx) {
287 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 288
289 memset(&qparam, 0, sizeof(qparam));
290
291 qparam.aifs = 2;
292
293 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
294 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
295 qparam.cw_min = 31;
296 else
297 qparam.cw_min = 15;
298
299 qparam.cw_max = 1023;
300 qparam.txop = 0;
301
e100bb64
JB		 302 for (i = 0; i < local_to_hw(local)->queues; i++)
303 local->ops->conf_tx(local_to_hw(local), i, &qparam);
e2839d8f
VK		 304 }
305}
306
f698d856 307static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 308 struct ieee80211_if_sta *ifsta,
309 u8 *wmm_param, size_t wmm_param_len)
310{
f0706e82
JB		 311 struct ieee80211_tx_queue_params params;
312 size_t left;
313 int count;
314 u8 *pos;
315
3434fbd3
JB		 316 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
317 return;
318
319 if (!wmm_param)
320 return;
321
f0706e82
JB		 322 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
323 return;
324 count = wmm_param[6] & 0x0f;
325 if (count == ifsta->wmm_last_param_set)
326 return;
327 ifsta->wmm_last_param_set = count;
328
329 pos = wmm_param + 8;
330 left = wmm_param_len - 8;
331
332 memset(&params, 0, sizeof(params));
333
334 if (!local->ops->conf_tx)
335 return;
336
337 local->wmm_acm = 0;
338 for (; left >= 4; left -= 4, pos += 4) {
339 int aci = (pos[0] >> 5) & 0x03;
340 int acm = (pos[0] >> 4) & 0x01;
341 int queue;
342
343 switch (aci) {
344 case 1:
e100bb64 345 queue = 3;
988c0f72 346 if (acm)
f0706e82 347 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 348 break;
349 case 2:
e100bb64 350 queue = 1;
988c0f72 351 if (acm)
f0706e82 352 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 353 break;
354 case 3:
e100bb64 355 queue = 0;
988c0f72 356 if (acm)
f0706e82 357 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 358 break;
359 case 0:
360 default:
e100bb64 361 queue = 2;
988c0f72 362 if (acm)
f0706e82 363 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 364 break;
365 }
366
367 params.aifs = pos[0] & 0x0f;
368 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
369 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 370 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 371#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 372 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 373 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 374 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 375 params.cw_max, params.txop);
376#endif
f0706e82
JB		 377 /* TODO: handle ACM (block TX, fallback to next lowest allowed
378 * AC for now) */
379 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
380 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 381 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 382 }
383 }
384}
385
50c4afb9
JL		 386static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
387 bool use_protection,
388 bool use_short_preamble)
5628221c 389{
471b3efd 390 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 391#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 392 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 393 DECLARE_MAC_BUF(mac);
ebd74487 394#endif
471b3efd 395 u32 changed = 0;
5628221c 396
471b3efd 397 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 398#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 399 if (net_ratelimit()) {
400 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 401 "%s)\n",
471b3efd 402 sdata->dev->name,
5628221c 403 use_protection ? "enabled" : "disabled",
0795af57 404 print_mac(mac, ifsta->bssid));
5628221c 405 }
f4ea83dd 406#endif
471b3efd
JB		 407 bss_conf->use_cts_prot = use_protection;
408 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 409 }
7e9ed188 410
d43c7b37 411 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 412#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 413 if (net_ratelimit()) {
414 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 415 " (BSSID=%s)\n",
471b3efd 416 sdata->dev->name,
d43c7b37 417 use_short_preamble ? "short" : "long",
0795af57 418 print_mac(mac, ifsta->bssid));
7e9ed188 419 }
f4ea83dd 420#endif
d43c7b37 421 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 422 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 423 }
d9430a32 424
471b3efd 425 return changed;
5628221c
DD		 426}
427
50c4afb9
JL		 428static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
429 u8 erp_value)
430{
431 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
432 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
433
434 return ieee80211_handle_protect_preamb(sdata,
435 use_protection, use_short_preamble);
436}
437
438static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
439 struct ieee80211_sta_bss *bss)
440{
441 u32 changed = 0;
442
443 if (bss->has_erp_value)
444 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
445 else {
446 u16 capab = bss->capability;
447 changed |= ieee80211_handle_protect_preamb(sdata, false,
448 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
449 }
450
451 return changed;
452}
453
c7153508
RR		 454int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
455 struct ieee80211_ht_info *ht_info)
456{
457
458 if (ht_info == NULL)
459 return -EINVAL;
460
461 memset(ht_info, 0, sizeof(*ht_info));
462
463 if (ht_cap_ie) {
464 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
465
466 ht_info->ht_supported = 1;
467 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
468 ht_info->ampdu_factor =
469 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
470 ht_info->ampdu_density =
471 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
472 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
473 } else
474 ht_info->ht_supported = 0;
475
476 return 0;
477}
478
479int ieee80211_ht_addt_info_ie_to_ht_bss_info(
480 struct ieee80211_ht_addt_info *ht_add_info_ie,
481 struct ieee80211_ht_bss_info *bss_info)
482{
483 if (bss_info == NULL)
484 return -EINVAL;
485
486 memset(bss_info, 0, sizeof(*bss_info));
487
488 if (ht_add_info_ie) {
489 u16 op_mode;
490 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
491
492 bss_info->primary_channel = ht_add_info_ie->control_chan;
493 bss_info->bss_cap = ht_add_info_ie->ht_param;
494 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
495 }
496
497 return 0;
498}
5628221c 499
f698d856 500static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 501 struct ieee80211_if_sta *ifsta)
502{
f0706e82
JB		 503 union iwreq_data wrqu;
504
f0706e82 505 if (ifsta->assocreq_ies) {
087d833e
JM		 506 memset(&wrqu, 0, sizeof(wrqu));
507 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 508 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 509 ifsta->assocreq_ies);
f0706e82 510 }
087d833e
JM		 511 if (ifsta->assocresp_ies) {
512 memset(&wrqu, 0, sizeof(wrqu));
513 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 514 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 515 ifsta->assocresp_ies);
f0706e82 516 }
f0706e82
JB		 517}
518
519
f698d856 520static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
d6f2da5b 521 struct ieee80211_if_sta *ifsta,
47f0c502 522 bool assoc)
f0706e82 523{
471b3efd 524 struct ieee80211_local *local = sdata->local;
38668c05 525 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 526 union iwreq_data wrqu;
471b3efd 527 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 528
f0706e82 529 if (assoc) {
5628221c 530 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 531
532 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
533
51fb61e7 534 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 535 return;
5628221c 536
f698d856 537 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
38668c05 538 conf->channel->center_freq,
cffdd30d 539 ifsta->ssid, ifsta->ssid_len);
5628221c 540 if (bss) {
21c0cbe7
TW		 541 /* set timing information */
542 sdata->bss_conf.beacon_int = bss->beacon_int;
543 sdata->bss_conf.timestamp = bss->timestamp;
98f7dfd8 544 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 545
50c4afb9 546 changed |= ieee80211_handle_bss_capability(sdata, bss);
21c0cbe7 547
3e122be0 548 ieee80211_rx_bss_put(local, bss);
5628221c
DD		 549 }
550
38668c05
TW		 551 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
552 changed |= BSS_CHANGED_HT;
553 sdata->bss_conf.assoc_ht = 1;
554 sdata->bss_conf.ht_conf = &conf->ht_conf;
555 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
556 }
557
d6f2da5b 558 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 559 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
560 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
f698d856 561 ieee80211_sta_send_associnfo(sdata, ifsta);
f0706e82 562 } else {
f698d856
JBG		 563 netif_carrier_off(sdata->dev);
564 ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid);
d6f2da5b 565 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
f698d856 566 changed |= ieee80211_reset_erp_info(sdata);
38668c05
TW		 567
568 sdata->bss_conf.assoc_ht = 0;
569 sdata->bss_conf.ht_conf = NULL;
570 sdata->bss_conf.ht_bss_conf = NULL;
571
f0706e82
JB		 572 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
573 }
f0706e82 574 ifsta->last_probe = jiffies;
47f0c502 575 ieee80211_led_assoc(local, assoc);
471b3efd 576
b2205256 577 sdata->bss_conf.assoc = assoc;
471b3efd 578 ieee80211_bss_info_change_notify(sdata, changed);
8db9369f
GC		 579
580 if (assoc)
f698d856 581 netif_carrier_on(sdata->dev);
8db9369f 582
41a7be48 583 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
f698d856 584 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
f0706e82
JB		 585}
586
f698d856 587static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 588 struct ieee80211_if_sta *ifsta, int deauth)
589{
9859b81e
RR		 590 if (deauth) {
591 ifsta->direct_probe_tries = 0;
f0706e82 592 ifsta->auth_tries = 0;
9859b81e 593 }
6042a3e3 594 ifsta->assoc_scan_tries = 0;
f0706e82 595 ifsta->assoc_tries = 0;
f698d856 596 ieee80211_set_associated(sdata, ifsta, 0);
f0706e82
JB		 597}
598
f698d856 599void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
ee385855 600 int encrypt)
f0706e82 601{
f0706e82
JB		 602 skb->dev = sdata->local->mdev;
603 skb_set_mac_header(skb, 0);
604 skb_set_network_header(skb, 0);
605 skb_set_transport_header(skb, 0);
606
d0f09804
JB		 607 skb->iif = sdata->dev->ifindex;
608 skb->do_not_encrypt = !encrypt;
f0706e82
JB		 609
610 dev_queue_xmit(skb);
611}
612
613
f698d856 614static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 615 struct ieee80211_if_sta *ifsta,
616 int transaction, u8 *extra, size_t extra_len,
617 int encrypt)
618{
f698d856 619 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 620 struct sk_buff *skb;
621 struct ieee80211_mgmt *mgmt;
622
623 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
624 sizeof(*mgmt) + 6 + extra_len);
625 if (!skb) {
626 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
f698d856 627 "frame\n", sdata->dev->name);
f0706e82
JB		 628 return;
629 }
630 skb_reserve(skb, local->hw.extra_tx_headroom);
631
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
633 memset(mgmt, 0, 24 + 6);
e7827a70
HH		 634 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
635 IEEE80211_STYPE_AUTH);
f0706e82
JB		 636 if (encrypt)
637 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
638 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 639 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 640 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
641 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
642 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
643 ifsta->auth_transaction = transaction + 1;
644 mgmt->u.auth.status_code = cpu_to_le16(0);
645 if (extra)
646 memcpy(skb_put(skb, extra_len), extra, extra_len);
647
f698d856 648 ieee80211_sta_tx(sdata, skb, encrypt);
f0706e82
JB		 649}
650
9859b81e
RR		 651static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
652 struct ieee80211_if_sta *ifsta)
653{
654 DECLARE_MAC_BUF(mac);
655
656 ifsta->direct_probe_tries++;
657 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
658 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
659 sdata->dev->name, print_mac(mac, ifsta->bssid));
660 ifsta->state = IEEE80211_STA_MLME_DISABLED;
661 return;
662 }
663
664 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
665 sdata->dev->name, print_mac(mac, ifsta->bssid),
666 ifsta->direct_probe_tries);
667
668 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
669
670 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
671
672 /* Direct probe is sent to broadcast address as some APs
673 * will not answer to direct packet in unassociated state.
674 */
675 ieee80211_send_probe_req(sdata, NULL,
676 ifsta->ssid, ifsta->ssid_len);
677
678 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
679}
680
f0706e82 681
f698d856 682static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 683 struct ieee80211_if_sta *ifsta)
684{
0795af57
JP		 685 DECLARE_MAC_BUF(mac);
686
f0706e82
JB		 687 ifsta->auth_tries++;
688 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 689 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 690 " timed out\n",
f698d856 691 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 692 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 693 return;
694 }
695
48c2fc59 696 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0795af57 697 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
f698d856 698 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 699
f698d856 700 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
f0706e82
JB		 701
702 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
703}
704
36d16ae7
HS		 705static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
706 struct ieee80211_supported_band *sband,
707 u64 *rates)
708{
709 int i, j, count;
710 *rates = 0;
711 count = 0;
712 for (i = 0; i < bss->supp_rates_len; i++) {
713 int rate = (bss->supp_rates[i] & 0x7F) * 5;
714
715 for (j = 0; j < sband->n_bitrates; j++)
716 if (sband->bitrates[j].bitrate == rate) {
717 *rates |= BIT(j);
718 count++;
719 break;
720 }
721 }
722
723 return count;
724}
f0706e82 725
f698d856 726static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 727 struct ieee80211_if_sta *ifsta)
728{
f698d856 729 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 730 struct sk_buff *skb;
731 struct ieee80211_mgmt *mgmt;
43ac2ca3 732 u8 *pos, *ies, *ht_add_ie;
36d16ae7 733 int i, len, count, rates_len, supp_rates_len;
f0706e82
JB		 734 u16 capab;
735 struct ieee80211_sta_bss *bss;
736 int wmm = 0;
8318d78a 737 struct ieee80211_supported_band *sband;
36d16ae7 738 u64 rates = 0;
f0706e82
JB		 739
740 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
741 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
742 ifsta->ssid_len);
743 if (!skb) {
744 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
f698d856 745 "frame\n", sdata->dev->name);
f0706e82
JB		 746 return;
747 }
748 skb_reserve(skb, local->hw.extra_tx_headroom);
749
8318d78a
JB		 750 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
751
f0706e82 752 capab = ifsta->capab;
8318d78a
JB		 753
754 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
755 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
756 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
757 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
758 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 759 }
8318d78a 760
f698d856 761 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 762 local->hw.conf.channel->center_freq,
cffdd30d 763 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 764 if (bss) {
765 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
766 capab |= WLAN_CAPABILITY_PRIVACY;
43ac2ca3 767 if (bss->wmm_used)
f0706e82 768 wmm = 1;
0d580a77
HS		 769
770 /* get all rates supported by the device and the AP as
771 * some APs don't like getting a superset of their rates
772 * in the association request (e.g. D-Link DAP 1353 in
773 * b-only mode) */
774 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
775
06ff47bc
TW		 776 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
777 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
778 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
779
3e122be0 780 ieee80211_rx_bss_put(local, bss);
0d580a77
HS		 781 } else {
782 rates = ~0;
783 rates_len = sband->n_bitrates;
f0706e82
JB		 784 }
785
786 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
787 memset(mgmt, 0, 24);
788 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 789 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 790 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
791
d6f2da5b 792 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82 793 skb_put(skb, 10);
e7827a70
HH		 794 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
795 IEEE80211_STYPE_REASSOC_REQ);
f0706e82 796 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 797 mgmt->u.reassoc_req.listen_interval =
798 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 799 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
800 ETH_ALEN);
801 } else {
802 skb_put(skb, 4);
e7827a70
HH		 803 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
804 IEEE80211_STYPE_ASSOC_REQ);
f0706e82 805 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 806 mgmt->u.reassoc_req.listen_interval =
807 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 808 }
809
810 /* SSID */
811 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
812 *pos++ = WLAN_EID_SSID;
813 *pos++ = ifsta->ssid_len;
814 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
815
0d580a77 816 /* add all rates which were marked to be used above */
36d16ae7
HS		 817 supp_rates_len = rates_len;
818 if (supp_rates_len > 8)
819 supp_rates_len = 8;
820
8318d78a 821 len = sband->n_bitrates;
36d16ae7 822 pos = skb_put(skb, supp_rates_len + 2);
f0706e82 823 *pos++ = WLAN_EID_SUPP_RATES;
36d16ae7 824 *pos++ = supp_rates_len;
f0706e82 825
36d16ae7
HS		 826 count = 0;
827 for (i = 0; i < sband->n_bitrates; i++) {
828 if (BIT(i) & rates) {
8318d78a 829 int rate = sband->bitrates[i].bitrate;
f0706e82 830 *pos++ = (u8) (rate / 5);
36d16ae7
HS		 831 if (++count == 8)
832 break;
833 }
834 }
835
8ab65b03 836 if (rates_len > count) {
36d16ae7
HS		 837 pos = skb_put(skb, rates_len - count + 2);
838 *pos++ = WLAN_EID_EXT_SUPP_RATES;
839 *pos++ = rates_len - count;
840
841 for (i++; i < sband->n_bitrates; i++) {
842 if (BIT(i) & rates) {
843 int rate = sband->bitrates[i].bitrate;
844 *pos++ = (u8) (rate / 5);
845 }
f0706e82
JB		 846 }
847 }
848
06ff47bc
TW		 849 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
850 /* 1. power capabilities */
851 pos = skb_put(skb, 4);
852 *pos++ = WLAN_EID_PWR_CAPABILITY;
853 *pos++ = 2;
854 *pos++ = 0; /* min tx power */
855 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
856
857 /* 2. supported channels */
858 /* TODO: get this in reg domain format */
859 pos = skb_put(skb, 2 * sband->n_channels + 2);
860 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
861 *pos++ = 2 * sband->n_channels;
862 for (i = 0; i < sband->n_channels; i++) {
863 *pos++ = ieee80211_frequency_to_channel(
864 sband->channels[i].center_freq);
865 *pos++ = 1; /* one channel in the subband*/
866 }
867 }
868
f0706e82
JB		 869 if (ifsta->extra_ie) {
870 pos = skb_put(skb, ifsta->extra_ie_len);
871 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
872 }
873
d6f2da5b 874 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 875 pos = skb_put(skb, 9);
876 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
877 *pos++ = 7; /* len */
878 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
879 *pos++ = 0x50;
880 *pos++ = 0xf2;
881 *pos++ = 2; /* WME */
882 *pos++ = 0; /* WME info */
883 *pos++ = 1; /* WME ver */
884 *pos++ = 0;
885 }
3434fbd3 886
c7153508 887 /* wmm support is a must to HT */
3434fbd3 888 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
43ac2ca3
JM		 889 sband->ht_info.ht_supported &&
890 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
9306102e 891 struct ieee80211_ht_addt_info *ht_add_info =
43ac2ca3 892 (struct ieee80211_ht_addt_info *)ht_add_ie;
9306102e
EG		 893 u16 cap = sband->ht_info.cap;
894 __le16 tmp;
895 u32 flags = local->hw.conf.channel->flags;
896
897 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
898 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
899 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
900 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
901 cap &= ~IEEE80211_HT_CAP_SGI_40;
902 }
903 break;
904 case IEEE80211_HT_IE_CHA_SEC_BELOW:
905 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
906 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
907 cap &= ~IEEE80211_HT_CAP_SGI_40;
908 }
909 break;
910 }
911
912 tmp = cpu_to_le16(cap);
c7153508
RR		 913 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
914 *pos++ = WLAN_EID_HT_CAPABILITY;
915 *pos++ = sizeof(struct ieee80211_ht_cap);
916 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
917 memcpy(pos, &tmp, sizeof(u16));
918 pos += sizeof(u16);
8318d78a
JB		 919 /* TODO: needs a define here for << 2 */
920 *pos++ = sband->ht_info.ampdu_factor |
921 (sband->ht_info.ampdu_density << 2);
922 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 923 }
f0706e82
JB		 924
925 kfree(ifsta->assocreq_ies);
926 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 927 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 928 if (ifsta->assocreq_ies)
929 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
930
f698d856 931 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 932}
933
934
f698d856 935static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 936 struct ieee80211_if_sta *ifsta, u16 reason)
937{
f698d856 938 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 939 struct sk_buff *skb;
940 struct ieee80211_mgmt *mgmt;
941
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
943 if (!skb) {
944 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
f698d856 945 "frame\n", sdata->dev->name);
f0706e82
JB		 946 return;
947 }
948 skb_reserve(skb, local->hw.extra_tx_headroom);
949
950 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
951 memset(mgmt, 0, 24);
952 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 953 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 954 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 955 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
956 IEEE80211_STYPE_DEAUTH);
f0706e82
JB		 957 skb_put(skb, 2);
958 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
959
f698d856 960 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 961}
962
963
f698d856 964static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 965 struct ieee80211_if_sta *ifsta, u16 reason)
966{
f698d856 967 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 968 struct sk_buff *skb;
969 struct ieee80211_mgmt *mgmt;
970
971 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
972 if (!skb) {
973 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
f698d856 974 "frame\n", sdata->dev->name);
f0706e82
JB		 975 return;
976 }
977 skb_reserve(skb, local->hw.extra_tx_headroom);
978
979 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
980 memset(mgmt, 0, 24);
981 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 982 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 983 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 984 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
985 IEEE80211_STYPE_DISASSOC);
f0706e82
JB		 986 skb_put(skb, 2);
987 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
988
f698d856 989 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 990}
991
992
f698d856 993static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 994 struct ieee80211_if_sta *ifsta)
995{
f698d856 996 struct ieee80211_local *local = sdata->local;
f0706e82 997 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 998 int bss_privacy;
999 int wep_privacy;
1000 int privacy_invoked;
f0706e82 1001
5b98b1f7 1002 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 1003 return 0;
1004
f698d856 1005 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 1006 local->hw.conf.channel->center_freq,
cffdd30d 1007 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1008 if (!bss)
1009 return 0;
1010
5b98b1f7 1011 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1012 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1013 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1014
3e122be0 1015 ieee80211_rx_bss_put(local, bss);
f0706e82 1016
5b98b1f7
JB		 1017 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1018 return 0;
1019
1020 return 1;
f0706e82
JB		 1021}
1022
1023
f698d856 1024static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1025 struct ieee80211_if_sta *ifsta)
1026{
0795af57
JP		 1027 DECLARE_MAC_BUF(mac);
1028
f0706e82
JB		 1029 ifsta->assoc_tries++;
1030 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 1031 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 1032 " timed out\n",
f698d856 1033 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 1034 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1035 return;
1036 }
1037
48c2fc59 1038 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 1039 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 1040 sdata->dev->name, print_mac(mac, ifsta->bssid));
1041 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1042 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1043 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1044 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1045 return;
1046 }
1047
f698d856 1048 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1049
1050 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1051}
1052
1053
f698d856 1054static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1055 struct ieee80211_if_sta *ifsta)
1056{
f698d856 1057 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1058 struct sta_info *sta;
1059 int disassoc;
0795af57 1060 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1061
1062 /* TODO: start monitoring current AP signal quality and number of
1063 * missed beacons. Scan other channels every now and then and search
1064 * for better APs. */
1065 /* TODO: remove expired BSSes */
1066
48c2fc59 1067 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1068
d0709a65
JB		 1069 rcu_read_lock();
1070
f0706e82
JB		 1071 sta = sta_info_get(local, ifsta->bssid);
1072 if (!sta) {
0795af57 1073 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 1074 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 1075 disassoc = 1;
1076 } else {
1077 disassoc = 0;
1078 if (time_after(jiffies,
1079 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1080 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1081 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 1082 "current AP %s - assume out of "
f0706e82 1083 "range\n",
f698d856 1084 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 1085 disassoc = 1;
d0709a65 1086 sta_info_unlink(&sta);
d6f2da5b 1087 } else
f698d856 1088 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1089 local->scan_ssid,
1090 local->scan_ssid_len);
d6f2da5b 1091 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1092 } else {
d6f2da5b 1093 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1094 if (time_after(jiffies, ifsta->last_probe +
1095 IEEE80211_PROBE_INTERVAL)) {
1096 ifsta->last_probe = jiffies;
f698d856 1097 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1098 ifsta->ssid,
1099 ifsta->ssid_len);
1100 }
1101 }
f0706e82 1102 }
d0709a65
JB		 1103
1104 rcu_read_unlock();
1105
3b96766f 1106 if (disassoc && sta)
d0709a65 1107 sta_info_destroy(sta);
d0709a65 1108
f0706e82 1109 if (disassoc) {
48c2fc59 1110 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f698d856 1111 ieee80211_set_associated(sdata, ifsta, 0);
f0706e82
JB		 1112 } else {
1113 mod_timer(&ifsta->timer, jiffies +
1114 IEEE80211_MONITORING_INTERVAL);
1115 }
1116}
1117
1118
f698d856 1119static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
f0706e82
JB		 1120 u8 *ssid, size_t ssid_len)
1121{
f698d856 1122 struct ieee80211_local *local = sdata->local;
8318d78a 1123 struct ieee80211_supported_band *sband;
f0706e82
JB		 1124 struct sk_buff *skb;
1125 struct ieee80211_mgmt *mgmt;
1126 u8 *pos, *supp_rates, *esupp_rates = NULL;
1127 int i;
1128
1129 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1130 if (!skb) {
1131 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
f698d856 1132 "request\n", sdata->dev->name);
f0706e82
JB		 1133 return;
1134 }
1135 skb_reserve(skb, local->hw.extra_tx_headroom);
1136
1137 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1138 memset(mgmt, 0, 24);
e7827a70
HH		 1139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1140 IEEE80211_STYPE_PROBE_REQ);
f698d856 1141 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 1142 if (dst) {
1143 memcpy(mgmt->da, dst, ETH_ALEN);
1144 memcpy(mgmt->bssid, dst, ETH_ALEN);
1145 } else {
1146 memset(mgmt->da, 0xff, ETH_ALEN);
1147 memset(mgmt->bssid, 0xff, ETH_ALEN);
1148 }
1149 pos = skb_put(skb, 2 + ssid_len);
1150 *pos++ = WLAN_EID_SSID;
1151 *pos++ = ssid_len;
1152 memcpy(pos, ssid, ssid_len);
1153
1154 supp_rates = skb_put(skb, 2);
1155 supp_rates[0] = WLAN_EID_SUPP_RATES;
1156 supp_rates[1] = 0;
8318d78a
JB		 1157 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1158
1159 for (i = 0; i < sband->n_bitrates; i++) {
1160 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 1161 if (esupp_rates) {
1162 pos = skb_put(skb, 1);
1163 esupp_rates[1]++;
1164 } else if (supp_rates[1] == 8) {
1165 esupp_rates = skb_put(skb, 3);
1166 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1167 esupp_rates[1] = 1;
1168 pos = &esupp_rates[2];
1169 } else {
1170 pos = skb_put(skb, 1);
1171 supp_rates[1]++;
1172 }
8318d78a 1173 *pos = rate->bitrate / 5;
f0706e82
JB		 1174 }
1175
f698d856 1176 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 1177}
1178
1179
f698d856 1180static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
f0706e82 1181{
f0706e82 1182 if (!sdata || !sdata->default_key ||
8f20fc24 1183 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 1184 return 0;
1185 return 1;
1186}
1187
1188
f698d856 1189static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1190 struct ieee80211_if_sta *ifsta)
1191{
f698d856 1192 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1193 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1194 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1195}
1196
1197
f698d856 1198static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1199 struct ieee80211_if_sta *ifsta,
1200 struct ieee80211_mgmt *mgmt,
1201 size_t len)
1202{
1203 u8 *pos;
1204 struct ieee802_11_elems elems;
1205
f0706e82 1206 pos = mgmt->u.auth.variable;
67a4cce4 1207 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1208 if (!elems.challenge)
f0706e82 1209 return;
f698d856 1210 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1211 elems.challenge_len + 2, 1);
1212}
1213
f698d856 1214static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
9f985b0e
RR		 1215 u8 dialog_token, u16 status, u16 policy,
1216 u16 buf_size, u16 timeout)
1217{
9f985b0e 1218 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 1219 struct ieee80211_local *local = sdata->local;
9f985b0e
RR		 1220 struct sk_buff *skb;
1221 struct ieee80211_mgmt *mgmt;
1222 u16 capab;
1223
3acea5b6
EK		 1224 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1225
9f985b0e
RR		 1226 if (!skb) {
1227 printk(KERN_DEBUG "%s: failed to allocate buffer "
f698d856 1228 "for addba resp frame\n", sdata->dev->name);
9f985b0e
RR		 1229 return;
1230 }
1231
1232 skb_reserve(skb, local->hw.extra_tx_headroom);
1233 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1234 memset(mgmt, 0, 24);
1235 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1236 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1237 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1238 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
9f985b0e
RR		 1239 else
1240 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1241 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1242 IEEE80211_STYPE_ACTION);
9f985b0e
RR		 1243
1244 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1245 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1246 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1247 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1248
1249 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1250 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1251 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1252
1253 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1254 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1255 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1256
f698d856 1257 ieee80211_sta_tx(sdata, skb, 0);
9f985b0e
RR		 1258
1259 return;
1260}
1261
f698d856 1262void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
eadc8d9e
RR		 1263 u16 tid, u8 dialog_token, u16 start_seq_num,
1264 u16 agg_size, u16 timeout)
1265{
f698d856 1266 struct ieee80211_local *local = sdata->local;
eadc8d9e
RR		 1267 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1268 struct sk_buff *skb;
1269 struct ieee80211_mgmt *mgmt;
1270 u16 capab;
1271
3acea5b6 1272 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
eadc8d9e
RR		 1273
1274 if (!skb) {
1275 printk(KERN_ERR "%s: failed to allocate buffer "
f698d856 1276 "for addba request frame\n", sdata->dev->name);
eadc8d9e
RR		 1277 return;
1278 }
1279 skb_reserve(skb, local->hw.extra_tx_headroom);
1280 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1281 memset(mgmt, 0, 24);
1282 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1283 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
eadc8d9e 1284 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1285 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
eadc8d9e
RR		 1286 else
1287 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1288
e7827a70
HH		 1289 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1290 IEEE80211_STYPE_ACTION);
eadc8d9e
RR		 1291
1292 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1293
1294 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1295 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1296
1297 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1298 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1299 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1300 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1301
1302 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1303
1304 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1305 mgmt->u.action.u.addba_req.start_seq_num =
1306 cpu_to_le16(start_seq_num << 4);
1307
f698d856 1308 ieee80211_sta_tx(sdata, skb, 0);
eadc8d9e
RR		 1309}
1310
f698d856 1311static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
9f985b0e
RR		 1312 struct ieee80211_mgmt *mgmt,
1313 size_t len)
1314{
07db2183
RR		 1315 struct ieee80211_hw *hw = &local->hw;
1316 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1317 struct sta_info *sta;
07db2183
RR		 1318 struct tid_ampdu_rx *tid_agg_rx;
1319 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1320 u8 dialog_token;
07db2183
RR		 1321 int ret = -EOPNOTSUPP;
1322 DECLARE_MAC_BUF(mac);
9f985b0e 1323
d0709a65
JB		 1324 rcu_read_lock();
1325
9f985b0e 1326 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1327 if (!sta) {
1328 rcu_read_unlock();
9f985b0e 1329 return;
d0709a65 1330 }
9f985b0e
RR		 1331
1332 /* extract session parameters from addba request frame */
1333 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1334 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1335 start_seq_num =
1336 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1337
1338 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1339 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1340 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1341 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1342
9f985b0e
RR		 1343 status = WLAN_STATUS_REQUEST_DECLINED;
1344
07db2183
RR		 1345 /* sanity check for incoming parameters:
1346 * check if configuration can support the BA policy
1347 * and if buffer size does not exceeds max value */
1348 if (((ba_policy != 1)
1349 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1350 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1351 status = WLAN_STATUS_INVALID_QOS_PARAM;
1352#ifdef CONFIG_MAC80211_HT_DEBUG
1353 if (net_ratelimit())
7b9d44cd 1354 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1355 "%s on tid %u. policy %d, buffer size %d\n",
1356 print_mac(mac, mgmt->sa), tid, ba_policy,
1357 buf_size);
1358#endif /* CONFIG_MAC80211_HT_DEBUG */
1359 goto end_no_lock;
1360 }
1361 /* determine default buffer size */
1362 if (buf_size == 0) {
8318d78a
JB		 1363 struct ieee80211_supported_band *sband;
1364
1365 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1366 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1367 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1368 }
1369
07db2183
RR		 1370
1371 /* examine state machine */
07346f81 1372 spin_lock_bh(&sta->lock);
07db2183 1373
cee24a3e 1374 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1375#ifdef CONFIG_MAC80211_HT_DEBUG
1376 if (net_ratelimit())
7b9d44cd 1377 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1378 "%s on tid %u\n",
1379 print_mac(mac, mgmt->sa), tid);
1380#endif /* CONFIG_MAC80211_HT_DEBUG */
1381 goto end;
1382 }
1383
cee24a3e
RR		 1384 /* prepare A-MPDU MLME for Rx aggregation */
1385 sta->ampdu_mlme.tid_rx[tid] =
1386 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1387 if (!sta->ampdu_mlme.tid_rx[tid]) {
f4ea83dd 1388#ifdef CONFIG_MAC80211_HT_DEBUG
cee24a3e
RR		 1389 if (net_ratelimit())
1390 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1391 tid);
f4ea83dd 1392#endif
cee24a3e
RR		 1393 goto end;
1394 }
1395 /* rx timer */
1396 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1397 sta_rx_agg_session_timer_expired;
1398 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1399 (unsigned long)&sta->timer_to_tid[tid];
1400 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1401
1402 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1403
07db2183
RR		 1404 /* prepare reordering buffer */
1405 tid_agg_rx->reorder_buf =
c97c23e3 1406 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
03147dfc 1407 if (!tid_agg_rx->reorder_buf) {
f4ea83dd 1408#ifdef CONFIG_MAC80211_HT_DEBUG
03147dfc
JB		 1409 if (net_ratelimit())
1410 printk(KERN_ERR "can not allocate reordering buffer "
1411 "to tid %d\n", tid);
f4ea83dd 1412#endif
cee24a3e 1413 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1414 goto end;
1415 }
1416 memset(tid_agg_rx->reorder_buf, 0,
c97c23e3 1417 buf_size * sizeof(struct sk_buff *));
07db2183
RR		 1418
1419 if (local->ops->ampdu_action)
1420 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1421 sta->addr, tid, &start_seq_num);
07db2183 1422#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1423 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1424#endif /* CONFIG_MAC80211_HT_DEBUG */
1425
1426 if (ret) {
1427 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1428 kfree(tid_agg_rx);
1429 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1430 goto end;
1431 }
1432
1433 /* change state and send addba resp */
cee24a3e 1434 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1435 tid_agg_rx->dialog_token = dialog_token;
1436 tid_agg_rx->ssn = start_seq_num;
1437 tid_agg_rx->head_seq_num = start_seq_num;
1438 tid_agg_rx->buf_size = buf_size;
1439 tid_agg_rx->timeout = timeout;
1440 tid_agg_rx->stored_mpdu_num = 0;
1441 status = WLAN_STATUS_SUCCESS;
1442end:
07346f81 1443 spin_unlock_bh(&sta->lock);
07db2183
RR		 1444
1445end_no_lock:
f698d856 1446 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
d0709a65
JB		 1447 dialog_token, status, 1, buf_size, timeout);
1448 rcu_read_unlock();
9f985b0e 1449}
f0706e82 1450
f698d856 1451static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
eadc8d9e
RR		 1452 struct ieee80211_mgmt *mgmt,
1453 size_t len)
1454{
eadc8d9e
RR		 1455 struct ieee80211_hw *hw = &local->hw;
1456 struct sta_info *sta;
1457 u16 capab;
1458 u16 tid;
1459 u8 *state;
1460
d0709a65
JB		 1461 rcu_read_lock();
1462
eadc8d9e 1463 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1464 if (!sta) {
1465 rcu_read_unlock();
eadc8d9e 1466 return;
d0709a65 1467 }
eadc8d9e
RR		 1468
1469 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1470 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1471
cee24a3e 1472 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1473
07346f81 1474 spin_lock_bh(&sta->lock);
eadc8d9e 1475
cee24a3e 1476 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1477 spin_unlock_bh(&sta->lock);
cee24a3e
RR		 1478 goto addba_resp_exit;
1479 }
1480
eadc8d9e 1481 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1482 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
07346f81 1483 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1484#ifdef CONFIG_MAC80211_HT_DEBUG
1485 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1486#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1487 goto addba_resp_exit;
eadc8d9e
RR		 1488 }
1489
cee24a3e 1490 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1491#ifdef CONFIG_MAC80211_HT_DEBUG
1492 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1493#endif /* CONFIG_MAC80211_HT_DEBUG */
1494 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1495 == WLAN_STATUS_SUCCESS) {
eadc8d9e 1496 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1497 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e 1498
f4ea83dd 1499 if (*state == HT_AGG_STATE_OPERATIONAL)
eadc8d9e 1500 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
eadc8d9e 1501
07346f81 1502 spin_unlock_bh(&sta->lock);
eadc8d9e 1503 } else {
cee24a3e 1504 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1505 /* this will allow the state check in stop_BA_session */
1506 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1507 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1508 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1509 WLAN_BACK_INITIATOR);
1510 }
cee24a3e
RR		 1511
1512addba_resp_exit:
d0709a65 1513 rcu_read_unlock();
eadc8d9e
RR		 1514}
1515
f698d856 1516void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
eadc8d9e 1517 u16 initiator, u16 reason_code)
07db2183 1518{
f698d856 1519 struct ieee80211_local *local = sdata->local;
07db2183
RR		 1520 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1521 struct sk_buff *skb;
1522 struct ieee80211_mgmt *mgmt;
1523 u16 params;
1524
3acea5b6 1525 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
07db2183
RR		 1526
1527 if (!skb) {
1528 printk(KERN_ERR "%s: failed to allocate buffer "
f698d856 1529 "for delba frame\n", sdata->dev->name);
07db2183
RR		 1530 return;
1531 }
1532
1533 skb_reserve(skb, local->hw.extra_tx_headroom);
1534 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1535 memset(mgmt, 0, 24);
1536 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1537 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1538 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1539 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
07db2183
RR		 1540 else
1541 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1542 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1543 IEEE80211_STYPE_ACTION);
07db2183
RR		 1544
1545 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1546
1547 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1548 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1549 params = (u16)(initiator << 11); /* bit 11 initiator */
1550 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1551
1552 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1553 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1554
f698d856 1555 ieee80211_sta_tx(sdata, skb, 0);
07db2183
RR		 1556}
1557
f698d856 1558void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
429a3805 1559{
f698d856 1560 struct ieee80211_local *local = sdata->local;
429a3805
RR		 1561 struct sk_buff *skb;
1562 struct ieee80211_bar *bar;
1563 u16 bar_control = 0;
1564
1565 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1566 if (!skb) {
1567 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1568 "bar frame\n", sdata->dev->name);
429a3805
RR		 1569 return;
1570 }
1571 skb_reserve(skb, local->hw.extra_tx_headroom);
1572 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1573 memset(bar, 0, sizeof(*bar));
e7827a70
HH		 1574 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1575 IEEE80211_STYPE_BACK_REQ);
429a3805 1576 memcpy(bar->ra, ra, ETH_ALEN);
f698d856 1577 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
429a3805
RR		 1578 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1579 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1580 bar_control |= (u16)(tid << 12);
1581 bar->control = cpu_to_le16(bar_control);
1582 bar->start_seq_num = cpu_to_le16(ssn);
1583
f698d856 1584 ieee80211_sta_tx(sdata, skb, 0);
429a3805
RR		 1585}
1586
f698d856 1587void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
07db2183
RR		 1588 u16 initiator, u16 reason)
1589{
f698d856 1590 struct ieee80211_local *local = sdata->local;
07db2183
RR		 1591 struct ieee80211_hw *hw = &local->hw;
1592 struct sta_info *sta;
b580781e 1593 int ret, i;
513a1025 1594 DECLARE_MAC_BUF(mac);
07db2183 1595
d0709a65
JB		 1596 rcu_read_lock();
1597
07db2183 1598 sta = sta_info_get(local, ra);
d0709a65
JB		 1599 if (!sta) {
1600 rcu_read_unlock();
07db2183 1601 return;
d0709a65 1602 }
07db2183
RR		 1603
1604 /* check if TID is in operational state */
07346f81 1605 spin_lock_bh(&sta->lock);
cee24a3e 1606 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183 1607 != HT_AGG_STATE_OPERATIONAL) {
07346f81 1608 spin_unlock_bh(&sta->lock);
d0709a65 1609 rcu_read_unlock();
07db2183
RR		 1610 return;
1611 }
cee24a3e 1612 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1613 HT_AGG_STATE_REQ_STOP_BA_MSK |
1614 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
07346f81 1615 spin_unlock_bh(&sta->lock);
07db2183
RR		 1616
1617 /* stop HW Rx aggregation. ampdu_action existence
1618 * already verified in session init so we add the BUG_ON */
1619 BUG_ON(!local->ops->ampdu_action);
1620
513a1025
RR		 1621#ifdef CONFIG_MAC80211_HT_DEBUG
1622 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1623 print_mac(mac, ra), tid);
1624#endif /* CONFIG_MAC80211_HT_DEBUG */
1625
07db2183 1626 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1627 ra, tid, NULL);
07db2183
RR		 1628 if (ret)
1629 printk(KERN_DEBUG "HW problem - can not stop rx "
f4ea83dd 1630 "aggregation for tid %d\n", tid);
07db2183
RR		 1631
1632 /* shutdown timer has not expired */
1633 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1634 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1635
1636 /* check if this is a self generated aggregation halt */
1637 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
f698d856 1638 ieee80211_send_delba(sdata, ra, tid, 0, reason);
07db2183
RR		 1639
1640 /* free the reordering buffer */
cee24a3e
RR		 1641 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1642 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1643 /* release the reordered frames */
cee24a3e
RR		 1644 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1645 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1646 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1647 }
1648 }
cee24a3e
RR		 1649 /* free resources */
1650 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1651 kfree(sta->ampdu_mlme.tid_rx[tid]);
1652 sta->ampdu_mlme.tid_rx[tid] = NULL;
1653 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1654
d0709a65 1655 rcu_read_unlock();
07db2183
RR		 1656}
1657
eadc8d9e 1658
f698d856 1659static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
688b88a4
RR		 1660 struct ieee80211_mgmt *mgmt, size_t len)
1661{
f698d856 1662 struct ieee80211_local *local = sdata->local;
688b88a4
RR		 1663 struct sta_info *sta;
1664 u16 tid, params;
1665 u16 initiator;
1666 DECLARE_MAC_BUF(mac);
1667
d0709a65
JB		 1668 rcu_read_lock();
1669
688b88a4 1670 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1671 if (!sta) {
1672 rcu_read_unlock();
688b88a4 1673 return;
d0709a65 1674 }
688b88a4
RR		 1675
1676 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1677 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1678 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1679
1680#ifdef CONFIG_MAC80211_HT_DEBUG
1681 if (net_ratelimit())
d92684e6
RR		 1682 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1683 print_mac(mac, mgmt->sa),
2e354ed7 1684 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1685 mgmt->u.action.u.delba.reason_code);
1686#endif /* CONFIG_MAC80211_HT_DEBUG */
1687
1688 if (initiator == WLAN_BACK_INITIATOR)
f698d856 1689 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
688b88a4 1690 WLAN_BACK_INITIATOR, 0);
d92684e6 1691 else { /* WLAN_BACK_RECIPIENT */
07346f81 1692 spin_lock_bh(&sta->lock);
cee24a3e 1693 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6 1694 HT_AGG_STATE_OPERATIONAL;
07346f81 1695 spin_unlock_bh(&sta->lock);
d92684e6
RR		 1696 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1697 WLAN_BACK_RECIPIENT);
1698 }
d0709a65 1699 rcu_read_unlock();
688b88a4
RR		 1700}
1701
eadc8d9e
RR		 1702/*
1703 * After sending add Block Ack request we activated a timer until
1704 * add Block Ack response will arrive from the recipient.
1705 * If this timer expires sta_addba_resp_timer_expired will be executed.
1706 */
1707void sta_addba_resp_timer_expired(unsigned long data)
1708{
1709 /* not an elegant detour, but there is no choice as the timer passes
1710 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1711 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e 1712 * array gives the sta through container_of */
70d251b2 1713 u16 tid = *(u8 *)data;
eadc8d9e
RR		 1714 struct sta_info *temp_sta = container_of((void *)data,
1715 struct sta_info, timer_to_tid[tid]);
1716
1717 struct ieee80211_local *local = temp_sta->local;
1718 struct ieee80211_hw *hw = &local->hw;
1719 struct sta_info *sta;
1720 u8 *state;
1721
d0709a65
JB		 1722 rcu_read_lock();
1723
eadc8d9e 1724 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1725 if (!sta) {
1726 rcu_read_unlock();
eadc8d9e 1727 return;
d0709a65 1728 }
eadc8d9e 1729
cee24a3e 1730 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1731 /* check if the TID waits for addBA response */
07346f81 1732 spin_lock_bh(&sta->lock);
eadc8d9e 1733 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1734 spin_unlock_bh(&sta->lock);
eadc8d9e 1735 *state = HT_AGG_STATE_IDLE;
f4ea83dd 1736#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e
RR		 1737 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1738 "expecting addBA response there", tid);
f4ea83dd 1739#endif
eadc8d9e
RR		 1740 goto timer_expired_exit;
1741 }
1742
f4ea83dd 1743#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e 1744 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
f4ea83dd 1745#endif
eadc8d9e
RR		 1746
1747 /* go through the state check in stop_BA_session */
1748 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1749 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1750 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1751 WLAN_BACK_INITIATOR);
1752
1753timer_expired_exit:
d0709a65 1754 rcu_read_unlock();
eadc8d9e
RR		 1755}
1756
07db2183 1757/*
7b9d44cd
RR		 1758 * After accepting the AddBA Request we activated a timer,
1759 * resetting it after each frame that arrives from the originator.
07db2183
RR		 1760 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1761 */
712590de 1762static void sta_rx_agg_session_timer_expired(unsigned long data)
07db2183
RR		 1763{
1764 /* not an elegant detour, but there is no choice as the timer passes
70d251b2 1765 * only one argument, and various sta_info are needed here, so init
73651ee6 1766 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1767 * array gives the sta through container_of */
1768 u8 *ptid = (u8 *)data;
1769 u8 *timer_to_id = ptid - *ptid;
1770 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1771 timer_to_tid[0]);
1772
f4ea83dd 1773#ifdef CONFIG_MAC80211_HT_DEBUG
07db2183 1774 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
f4ea83dd 1775#endif
f698d856 1776 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
d0709a65 1777 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1778 WLAN_REASON_QSTA_TIMEOUT);
1779}
1780
f698d856 1781void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
85249e5f 1782{
f698d856 1783 struct ieee80211_local *local = sdata->local;
85249e5f
RR		 1784 int i;
1785
1786 for (i = 0; i < STA_TID_NUM; i++) {
1787 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1788 WLAN_BACK_INITIATOR);
f698d856 1789 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
85249e5f
RR		 1790 WLAN_BACK_RECIPIENT,
1791 WLAN_REASON_QSTA_LEAVE_QBSS);
1792 }
1793}
07db2183 1794
f698d856 1795static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1796 struct ieee80211_msrment_ie *request_ie,
1797 const u8 *da, const u8 *bssid,
1798 u8 dialog_token)
1799{
f698d856 1800 struct ieee80211_local *local = sdata->local;
b6623486
AK		 1801 struct sk_buff *skb;
1802 struct ieee80211_mgmt *msr_report;
1803
1804 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1805 sizeof(struct ieee80211_msrment_ie));
1806
1807 if (!skb) {
1808 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1809 "measurement report frame\n", sdata->dev->name);
b6623486
AK		 1810 return;
1811 }
1812
1813 skb_reserve(skb, local->hw.extra_tx_headroom);
1814 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1815 memset(msr_report, 0, 24);
1816 memcpy(msr_report->da, da, ETH_ALEN);
f698d856 1817 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
b6623486 1818 memcpy(msr_report->bssid, bssid, ETH_ALEN);
e7827a70 1819 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
b6623486
AK		 1820 IEEE80211_STYPE_ACTION);
1821
1822 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1823 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1824 msr_report->u.action.u.measurement.action_code =
1825 WLAN_ACTION_SPCT_MSR_RPRT;
1826 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1827
1828 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1829 msr_report->u.action.u.measurement.length =
1830 sizeof(struct ieee80211_msrment_ie);
1831
1832 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1833 sizeof(struct ieee80211_msrment_ie));
1834 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1835 msr_report->u.action.u.measurement.msr_elem.mode |=
1836 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1837 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1838
f698d856 1839 ieee80211_sta_tx(sdata, skb, 0);
b6623486
AK		 1840}
1841
f698d856 1842static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1843 struct ieee80211_mgmt *mgmt,
1844 size_t len)
1845{
1846 /*
1847 * Ignoring measurement request is spec violation.
1848 * Mandatory measurements must be reported optional
1849 * measurements might be refused or reported incapable
1850 * For now just refuse
1851 * TODO: Answer basic measurement as unmeasured
1852 */
f698d856 1853 ieee80211_send_refuse_measurement_request(sdata,
b6623486
AK		 1854 &mgmt->u.action.u.measurement.msr_elem,
1855 mgmt->sa, mgmt->bssid,
1856 mgmt->u.action.u.measurement.dialog_token);
1857}
1858
1859
f698d856 1860static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1861 struct ieee80211_if_sta *ifsta,
1862 struct ieee80211_mgmt *mgmt,
1863 size_t len)
1864{
f0706e82 1865 u16 auth_alg, auth_transaction, status_code;
0795af57 1866 DECLARE_MAC_BUF(mac);
f0706e82 1867
48c2fc59 1868 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 1869 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1870 return;
f0706e82 1871
f4ea83dd 1872 if (len < 24 + 6)
f0706e82 1873 return;
f0706e82 1874
51fb61e7 1875 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1876 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1877 return;
f0706e82 1878
51fb61e7 1879 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1880 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1881 return;
f0706e82
JB		 1882
1883 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1884 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1885 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1886
51fb61e7 1887 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1888 /*
1889 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1890 * networks and most implementations do not seem to use it.
1891 * However, try to reply to authentication attempts if someone
1892 * has actually implemented this.
135a2110 1893 */
f4ea83dd 1894 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1895 return;
f698d856 1896 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1897 }
1898
1899 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1900 auth_transaction != ifsta->auth_transaction)
f0706e82 1901 return;
f0706e82
JB		 1902
1903 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1904 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1905 u8 algs[3];
1906 const int num_algs = ARRAY_SIZE(algs);
1907 int i, pos;
1908 algs[0] = algs[1] = algs[2] = 0xff;
1909 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1910 algs[0] = WLAN_AUTH_OPEN;
1911 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1912 algs[1] = WLAN_AUTH_SHARED_KEY;
1913 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1914 algs[2] = WLAN_AUTH_LEAP;
1915 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1916 pos = 0;
1917 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1918 pos = 1;
1919 else
1920 pos = 2;
1921 for (i = 0; i < num_algs; i++) {
1922 pos++;
1923 if (pos >= num_algs)
1924 pos = 0;
1925 if (algs[pos] == ifsta->auth_alg ||
1926 algs[pos] == 0xff)
1927 continue;
1928 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1929 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1930 continue;
1931 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1932 break;
1933 }
1934 }
1935 return;
1936 }
1937
1938 switch (ifsta->auth_alg) {
1939 case WLAN_AUTH_OPEN:
1940 case WLAN_AUTH_LEAP:
f698d856 1941 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1942 break;
1943 case WLAN_AUTH_SHARED_KEY:
1944 if (ifsta->auth_transaction == 4)
f698d856 1945 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1946 else
f698d856 1947 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1948 break;
1949 }
1950}
1951
1952
f698d856 1953static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1954 struct ieee80211_if_sta *ifsta,
1955 struct ieee80211_mgmt *mgmt,
1956 size_t len)
1957{
1958 u16 reason_code;
0795af57 1959 DECLARE_MAC_BUF(mac);
f0706e82 1960
f4ea83dd 1961 if (len < 24 + 2)
f0706e82 1962 return;
f0706e82 1963
f4ea83dd 1964 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1965 return;
f0706e82
JB		 1966
1967 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1968
988c0f72 1969 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1970 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1971
48c2fc59
TW		 1972 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1973 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1974 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1975 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1976 mod_timer(&ifsta->timer, jiffies +
1977 IEEE80211_RETRY_AUTH_INTERVAL);
1978 }
1979
f698d856 1980 ieee80211_set_disassoc(sdata, ifsta, 1);
d6f2da5b 1981 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1982}
1983
1984
f698d856 1985static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1986 struct ieee80211_if_sta *ifsta,
1987 struct ieee80211_mgmt *mgmt,
1988 size_t len)
1989{
1990 u16 reason_code;
0795af57 1991 DECLARE_MAC_BUF(mac);
f0706e82 1992
f4ea83dd 1993 if (len < 24 + 2)
f0706e82 1994 return;
f0706e82 1995
f4ea83dd 1996 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1997 return;
f0706e82
JB		 1998
1999 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2000
d6f2da5b 2001 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 2002 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 2003
48c2fc59
TW		 2004 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
2005 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 2006 mod_timer(&ifsta->timer, jiffies +
2007 IEEE80211_RETRY_AUTH_INTERVAL);
2008 }
2009
f698d856 2010 ieee80211_set_disassoc(sdata, ifsta, 0);
f0706e82
JB		 2011}
2012
2013
471b3efd 2014static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2015 struct ieee80211_if_sta *ifsta,
2016 struct ieee80211_mgmt *mgmt,
2017 size_t len,
2018 int reassoc)
2019{
471b3efd 2020 struct ieee80211_local *local = sdata->local;
8318d78a 2021 struct ieee80211_supported_band *sband;
f0706e82 2022 struct sta_info *sta;
8318d78a 2023 u64 rates, basic_rates;
f0706e82
JB		 2024 u16 capab_info, status_code, aid;
2025 struct ieee802_11_elems elems;
471b3efd 2026 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 2027 u8 *pos;
2028 int i, j;
0795af57 2029 DECLARE_MAC_BUF(mac);
8318d78a 2030 bool have_higher_than_11mbit = false;
f0706e82
JB		 2031
2032 /* AssocResp and ReassocResp have identical structure, so process both
2033 * of them in this function. */
2034
48c2fc59 2035 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 2036 return;
f0706e82 2037
f4ea83dd 2038 if (len < 24 + 6)
f0706e82 2039 return;
f0706e82 2040
f4ea83dd 2041 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 2042 return;
f0706e82
JB		 2043
2044 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2045 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2046 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 2047
0795af57 2048 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 2049 "status=%d aid=%d)\n",
f698d856 2050 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 2051 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 2052
2053 if (status_code != WLAN_STATUS_SUCCESS) {
2054 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 2055 sdata->dev->name, status_code);
8a69aa93
DD		 2056 /* if this was a reassociation, ensure we try a "full"
2057 * association next time. This works around some broken APs
2058 * which do not correctly reject reassociation requests. */
d6f2da5b 2059 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2060 return;
2061 }
2062
1dd84aa2
JB		 2063 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2064 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 2065 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 2066 aid &= ~(BIT(15) | BIT(14));
2067
f0706e82 2068 pos = mgmt->u.assoc_resp.variable;
67a4cce4 2069 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 2070
2071 if (!elems.supp_rates) {
2072 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 2073 sdata->dev->name);
f0706e82
JB		 2074 return;
2075 }
2076
f698d856 2077 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 2078 ifsta->aid = aid;
2079 ifsta->ap_capab = capab_info;
2080
2081 kfree(ifsta->assocresp_ies);
2082 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 2083 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 2084 if (ifsta->assocresp_ies)
2085 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2086
d0709a65
JB		 2087 rcu_read_lock();
2088
f0706e82
JB		 2089 /* Add STA entry for the AP */
2090 sta = sta_info_get(local, ifsta->bssid);
2091 if (!sta) {
2092 struct ieee80211_sta_bss *bss;
73651ee6 2093 int err;
d0709a65 2094
73651ee6
JB		 2095 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2096 if (!sta) {
2097 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 2098 " the AP\n", sdata->dev->name);
d0709a65 2099 rcu_read_unlock();
f0706e82
JB		 2100 return;
2101 }
f698d856 2102 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 2103 local->hw.conf.channel->center_freq,
cffdd30d 2104 ifsta->ssid, ifsta->ssid_len);
f0706e82 2105 if (bss) {
f0706e82 2106 sta->last_signal = bss->signal;
566bfe5a 2107 sta->last_qual = bss->qual;
f0706e82 2108 sta->last_noise = bss->noise;
3e122be0 2109 ieee80211_rx_bss_put(local, bss);
f0706e82 2110 }
73651ee6
JB		 2111
2112 err = sta_info_insert(sta);
2113 if (err) {
2114 printk(KERN_DEBUG "%s: failed to insert STA entry for"
f698d856 2115 " the AP (error %d)\n", sdata->dev->name, err);
73651ee6
JB		 2116 rcu_read_unlock();
2117 return;
2118 }
a61dae1f
RR		 2119 /* update new sta with its last rx activity */
2120 sta->last_rx = jiffies;
f0706e82
JB		 2121 }
2122
73651ee6
JB		 2123 /*
2124 * FIXME: Do we really need to update the sta_info's information here?
2125 * We already know about the AP (we found it in our list) so it
2126 * should already be filled with the right info, no?
2127 * As is stands, all this is racy because typically we assume
2128 * the information that is filled in here (except flags) doesn't
2129 * change while a STA structure is alive. As such, it should move
2130 * to between the sta_info_alloc() and sta_info_insert() above.
2131 */
2132
07346f81
JB		 2133 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2134 WLAN_STA_AUTHORIZED);
f0706e82
JB		 2135
2136 rates = 0;
8318d78a
JB		 2137 basic_rates = 0;
2138 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2139
f0706e82
JB		 2140 for (i = 0; i < elems.supp_rates_len; i++) {
2141 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 2142
2143 if (rate > 110)
2144 have_higher_than_11mbit = true;
2145
2146 for (j = 0; j < sband->n_bitrates; j++) {
2147 if (sband->bitrates[j].bitrate == rate)
f0706e82 2148 rates |= BIT(j);
8318d78a
JB		 2149 if (elems.supp_rates[i] & 0x80)
2150 basic_rates |= BIT(j);
2151 }
f0706e82 2152 }
8318d78a 2153
f0706e82
JB		 2154 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2155 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 2156
2157 if (rate > 110)
2158 have_higher_than_11mbit = true;
2159
2160 for (j = 0; j < sband->n_bitrates; j++) {
2161 if (sband->bitrates[j].bitrate == rate)
f0706e82 2162 rates |= BIT(j);
8318d78a
JB		 2163 if (elems.ext_supp_rates[i] & 0x80)
2164 basic_rates |= BIT(j);
2165 }
f0706e82 2166 }
8318d78a
JB		 2167
2168 sta->supp_rates[local->hw.conf.channel->band] = rates;
2169 sdata->basic_rates = basic_rates;
2170
2171 /* cf. IEEE 802.11 9.2.12 */
2172 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2173 have_higher_than_11mbit)
2174 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2175 else
2176 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2177
3434fbd3
JB		 2178 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2179 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
d3c990fb 2180 struct ieee80211_ht_bss_info bss_info;
d3c990fb
RR		 2181 ieee80211_ht_cap_ie_to_ht_info(
2182 (struct ieee80211_ht_cap *)
2183 elems.ht_cap_elem, &sta->ht_info);
2184 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2185 (struct ieee80211_ht_addt_info *)
2186 elems.ht_info_elem, &bss_info);
38668c05 2187 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
d3c990fb
RR		 2188 }
2189
f0706e82
JB		 2190 rate_control_rate_init(sta, local);
2191
3434fbd3 2192 if (elems.wmm_param) {
07346f81 2193 set_sta_flags(sta, WLAN_STA_WME);
e5f98f2d 2194 rcu_read_unlock();
f698d856 2195 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
f0706e82 2196 elems.wmm_param_len);
e5f98f2d
JB		 2197 } else
2198 rcu_read_unlock();
f0706e82 2199
21c0cbe7
TW		 2200 /* set AID and assoc capability,
2201 * ieee80211_set_associated() will tell the driver */
8318d78a 2202 bss_conf->aid = aid;
21c0cbe7 2203 bss_conf->assoc_capability = capab_info;
f698d856 2204 ieee80211_set_associated(sdata, ifsta, 1);
f0706e82 2205
f698d856 2206 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 2207}
2208
2209
2210/* Caller must hold local->sta_bss_lock */
f698d856 2211static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
f0706e82
JB		 2212 struct ieee80211_sta_bss *bss)
2213{
f709fc69 2214 u8 hash_idx;
902acc78
JB		 2215
2216 if (bss_mesh_cfg(bss))
2217 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2218 bss_mesh_id_len(bss));
f709fc69 2219 else
f709fc69 2220 hash_idx = STA_HASH(bss->bssid);
902acc78 2221
f709fc69
LCC		 2222 bss->hnext = local->sta_bss_hash[hash_idx];
2223 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 2224}
2225
2226
2227/* Caller must hold local->sta_bss_lock */
3e122be0 2228static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
f0706e82
JB		 2229 struct ieee80211_sta_bss *bss)
2230{
f0706e82
JB		 2231 struct ieee80211_sta_bss *b, *prev = NULL;
2232 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2233 while (b) {
2234 if (b == bss) {
2235 if (!prev)
2236 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2237 bss->hnext;
2238 else
2239 prev->hnext = bss->hnext;
2240 break;
2241 }
2242 prev = b;
2243 b = b->hnext;
2244 }
2245}
2246
2247
2248static struct ieee80211_sta_bss *
f698d856 2249ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
cffdd30d 2250 u8 *ssid, u8 ssid_len)
f0706e82 2251{
f698d856 2252 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2253 struct ieee80211_sta_bss *bss;
2254
dd00cc48 2255 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 2256 if (!bss)
2257 return NULL;
f0706e82
JB		 2258 atomic_inc(&bss->users);
2259 atomic_inc(&bss->users);
2260 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2261 bss->freq = freq;
cffdd30d
JL		 2262 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2263 memcpy(bss->ssid, ssid, ssid_len);
2264 bss->ssid_len = ssid_len;
2265 }
f0706e82
JB		 2266
2267 spin_lock_bh(&local->sta_bss_lock);
2268 /* TODO: order by RSSI? */
2269 list_add_tail(&bss->list, &local->sta_bss_list);
f698d856 2270 __ieee80211_rx_bss_hash_add(local, bss);
f0706e82
JB		 2271 spin_unlock_bh(&local->sta_bss_lock);
2272 return bss;
2273}
2274
f0706e82 2275static struct ieee80211_sta_bss *
f698d856 2276ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
cffdd30d 2277 u8 *ssid, u8 ssid_len)
f0706e82 2278{
f0706e82
JB		 2279 struct ieee80211_sta_bss *bss;
2280
2281 spin_lock_bh(&local->sta_bss_lock);
2282 bss = local->sta_bss_hash[STA_HASH(bssid)];
2283 while (bss) {
902acc78
JB		 2284 if (!bss_mesh_cfg(bss) &&
2285 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2286 bss->freq == freq &&
cffdd30d
JL		 2287 bss->ssid_len == ssid_len &&
2288 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2289 atomic_inc(&bss->users);
2290 break;
2291 }
2292 bss = bss->hnext;
2293 }
2294 spin_unlock_bh(&local->sta_bss_lock);
2295 return bss;
2296}
2297
f709fc69
LCC		 2298#ifdef CONFIG_MAC80211_MESH
2299static struct ieee80211_sta_bss *
f698d856 2300ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
f709fc69
LCC		 2301 u8 *mesh_cfg, int freq)
2302{
f709fc69
LCC		 2303 struct ieee80211_sta_bss *bss;
2304
2305 spin_lock_bh(&local->sta_bss_lock);
2306 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2307 while (bss) {
902acc78
JB		 2308 if (bss_mesh_cfg(bss) &&
2309 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2310 bss->freq == freq &&
2311 mesh_id_len == bss->mesh_id_len &&
2312 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2313 mesh_id_len))) {
2314 atomic_inc(&bss->users);
2315 break;
2316 }
2317 bss = bss->hnext;
2318 }
2319 spin_unlock_bh(&local->sta_bss_lock);
2320 return bss;
2321}
2322
2323static struct ieee80211_sta_bss *
f698d856 2324ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
05e5e883 2325 u8 *mesh_cfg, int mesh_config_len, int freq)
f709fc69 2326{
f709fc69
LCC		 2327 struct ieee80211_sta_bss *bss;
2328
05e5e883
LCC		 2329 if (mesh_config_len != MESH_CFG_LEN)
2330 return NULL;
2331
f709fc69
LCC		 2332 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2333 if (!bss)
2334 return NULL;
2335
24736701 2336 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
f709fc69
LCC		 2337 if (!bss->mesh_cfg) {
2338 kfree(bss);
2339 return NULL;
2340 }
2341
2342 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2343 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2344 if (!bss->mesh_id) {
2345 kfree(bss->mesh_cfg);
2346 kfree(bss);
2347 return NULL;
2348 }
2349 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2350 }
2351
2352 atomic_inc(&bss->users);
2353 atomic_inc(&bss->users);
24736701 2354 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
f709fc69
LCC		 2355 bss->mesh_id_len = mesh_id_len;
2356 bss->freq = freq;
2357 spin_lock_bh(&local->sta_bss_lock);
2358 /* TODO: order by RSSI? */
2359 list_add_tail(&bss->list, &local->sta_bss_list);
f698d856 2360 __ieee80211_rx_bss_hash_add(local, bss);
f709fc69
LCC		 2361 spin_unlock_bh(&local->sta_bss_lock);
2362 return bss;
2363}
2364#endif
f0706e82
JB		 2365
2366static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2367{
43ac2ca3 2368 kfree(bss->ies);
902acc78
JB		 2369 kfree(bss_mesh_id(bss));
2370 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2371 kfree(bss);
2372}
2373
2374
3e122be0 2375static void ieee80211_rx_bss_put(struct ieee80211_local *local,
f0706e82
JB		 2376 struct ieee80211_sta_bss *bss)
2377{
1ebebea8
PE		 2378 local_bh_disable();
2379 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2380 local_bh_enable();
f0706e82 2381 return;
1ebebea8 2382 }
f0706e82 2383
3e122be0 2384 __ieee80211_rx_bss_hash_del(local, bss);
f0706e82
JB		 2385 list_del(&bss->list);
2386 spin_unlock_bh(&local->sta_bss_lock);
2387 ieee80211_rx_bss_free(bss);
2388}
2389
2390
3e122be0 2391void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
f0706e82 2392{
f0706e82
JB		 2393 spin_lock_init(&local->sta_bss_lock);
2394 INIT_LIST_HEAD(&local->sta_bss_list);
2395}
2396
2397
3e122be0 2398void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
f0706e82 2399{
f0706e82
JB		 2400 struct ieee80211_sta_bss *bss, *tmp;
2401
2402 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
3e122be0 2403 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2404}
2405
2406
f698d856 2407static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 2408 struct ieee80211_if_sta *ifsta,
2409 struct ieee80211_sta_bss *bss)
2410{
f698d856 2411 struct ieee80211_local *local = sdata->local;
a607268a
BR		 2412 int res, rates, i, j;
2413 struct sk_buff *skb;
2414 struct ieee80211_mgmt *mgmt;
a607268a 2415 u8 *pos;
a607268a 2416 struct ieee80211_supported_band *sband;
507b06d0 2417 union iwreq_data wrqu;
a607268a
BR		 2418
2419 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2420
2421 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2422 sta_info_flush_delayed(sdata);
a607268a
BR		 2423
2424 if (local->ops->reset_tsf) {
2425 /* Reset own TSF to allow time synchronization work. */
2426 local->ops->reset_tsf(local_to_hw(local));
2427 }
2428 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 2429 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 2430 if (res)
2431 return res;
2432
2433 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2434
a607268a
BR		 2435 sdata->drop_unencrypted = bss->capability &
2436 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2437
f698d856 2438 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 2439
be038b37
AK		 2440 if (res)
2441 return res;
a607268a 2442
9d139c81 2443 /* Build IBSS probe response */
a607268a 2444 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 2445 if (skb) {
a607268a
BR		 2446 skb_reserve(skb, local->hw.extra_tx_headroom);
2447
2448 mgmt = (struct ieee80211_mgmt *)
2449 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2450 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 2451 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2452 IEEE80211_STYPE_PROBE_RESP);
a607268a 2453 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 2454 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 2455 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2456 mgmt->u.beacon.beacon_int =
2457 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 2458 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 2459 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2460
2461 pos = skb_put(skb, 2 + ifsta->ssid_len);
2462 *pos++ = WLAN_EID_SSID;
2463 *pos++ = ifsta->ssid_len;
2464 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2465
2466 rates = bss->supp_rates_len;
2467 if (rates > 8)
2468 rates = 8;
2469 pos = skb_put(skb, 2 + rates);
2470 *pos++ = WLAN_EID_SUPP_RATES;
2471 *pos++ = rates;
2472 memcpy(pos, bss->supp_rates, rates);
2473
2474 if (bss->band == IEEE80211_BAND_2GHZ) {
2475 pos = skb_put(skb, 2 + 1);
2476 *pos++ = WLAN_EID_DS_PARAMS;
2477 *pos++ = 1;
2478 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2479 }
2480
2481 pos = skb_put(skb, 2 + 2);
2482 *pos++ = WLAN_EID_IBSS_PARAMS;
2483 *pos++ = 2;
2484 /* FIX: set ATIM window based on scan results */
2485 *pos++ = 0;
2486 *pos++ = 0;
2487
2488 if (bss->supp_rates_len > 8) {
2489 rates = bss->supp_rates_len - 8;
2490 pos = skb_put(skb, 2 + rates);
2491 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2492 *pos++ = rates;
2493 memcpy(pos, &bss->supp_rates[8], rates);
2494 }
2495
9d139c81 2496 ifsta->probe_resp = skb;
e039fa4a 2497
9d139c81
JB		 2498 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2499 }
a607268a 2500
9d139c81
JB		 2501 rates = 0;
2502 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2503 for (i = 0; i < bss->supp_rates_len; i++) {
2504 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2505 for (j = 0; j < sband->n_bitrates; j++)
2506 if (sband->bitrates[j].bitrate == bitrate)
2507 rates |= BIT(j);
a607268a 2508 }
9d139c81
JB		 2509 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2510
f698d856 2511 ieee80211_sta_def_wmm_params(sdata, bss, 1);
a607268a 2512
48c2fc59 2513 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 2514 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2515
507b06d0
DW		 2516 memset(&wrqu, 0, sizeof(wrqu));
2517 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 2518 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 2519
2520 return res;
2521}
2522
f709fc69
LCC		 2523u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2524 struct ieee802_11_elems *elems,
2525 enum ieee80211_band band)
2526{
2527 struct ieee80211_supported_band *sband;
2528 struct ieee80211_rate *bitrates;
2529 size_t num_rates;
2530 u64 supp_rates;
2531 int i, j;
2532 sband = local->hw.wiphy->bands[band];
2533
2534 if (!sband) {
2535 WARN_ON(1);
2536 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2537 }
2538
2539 bitrates = sband->bitrates;
2540 num_rates = sband->n_bitrates;
2541 supp_rates = 0;
2542 for (i = 0; i < elems->supp_rates_len +
2543 elems->ext_supp_rates_len; i++) {
2544 u8 rate = 0;
2545 int own_rate;
2546 if (i < elems->supp_rates_len)
2547 rate = elems->supp_rates[i];
2548 else if (elems->ext_supp_rates)
2549 rate = elems->ext_supp_rates
2550 [i - elems->supp_rates_len];
2551 own_rate = 5 * (rate & 0x7f);
2552 for (j = 0; j < num_rates; j++)
2553 if (bitrates[j].bitrate == own_rate)
2554 supp_rates |= BIT(j);
2555 }
2556 return supp_rates;
2557}
2558
8e1535d5
EG		 2559static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2560 enum ieee80211_band band)
2561{
2562 struct ieee80211_supported_band *sband;
2563 struct ieee80211_rate *bitrates;
2564 u64 mandatory_rates;
2565 enum ieee80211_rate_flags mandatory_flag;
2566 int i;
2567
2568 sband = local->hw.wiphy->bands[band];
2569 if (!sband) {
2570 WARN_ON(1);
2571 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2572 }
2573
2574 if (band == IEEE80211_BAND_2GHZ)
2575 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2576 else
2577 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2578
2579 bitrates = sband->bitrates;
2580 mandatory_rates = 0;
2581 for (i = 0; i < sband->n_bitrates; i++)
2582 if (bitrates[i].flags & mandatory_flag)
2583 mandatory_rates |= BIT(i);
2584 return mandatory_rates;
2585}
a607268a 2586
f698d856 2587static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2588 struct ieee80211_mgmt *mgmt,
2589 size_t len,
2590 struct ieee80211_rx_status *rx_status,
9859b81e 2591 struct ieee802_11_elems *elems)
f0706e82 2592{
f698d856 2593 struct ieee80211_local *local = sdata->local;
8318d78a 2594 int freq, clen;
f0706e82
JB		 2595 struct ieee80211_sta_bss *bss;
2596 struct sta_info *sta;
fab7d4a2 2597 struct ieee80211_channel *channel;
8e1535d5
EG		 2598 u64 beacon_timestamp, rx_timestamp;
2599 u64 supp_rates = 0;
9859b81e 2600 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
8e1535d5 2601 enum ieee80211_band band = rx_status->band;
0795af57
JP		 2602 DECLARE_MAC_BUF(mac);
2603 DECLARE_MAC_BUF(mac2);
f0706e82 2604
5bda6175
JB		 2605 if (elems->ds_params && elems->ds_params_len == 1)
2606 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2607 else
2608 freq = rx_status->freq;
2609
2610 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2611
2612 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2613 return;
f0706e82 2614
ae6a44e3 2615 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
f698d856 2616 elems->mesh_config && mesh_matches_local(elems, sdata)) {
8e1535d5 2617 supp_rates = ieee80211_sta_get_rates(local, elems, band);
902acc78 2618
8e1535d5 2619 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
f698d856 2620 mesh_peer_accepts_plinks(elems));
902acc78 2621 }
f709fc69 2622
ae6a44e3 2623 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
8e1535d5 2624 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
8e1535d5
EG		 2625 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2626
69e6c010
JB		 2627 rcu_read_lock();
2628
8e1535d5
EG		 2629 sta = sta_info_get(local, mgmt->sa);
2630 if (sta) {
2631 u64 prev_rates;
2632
2633 prev_rates = sta->supp_rates[band];
2634 /* make sure mandatory rates are always added */
2635 sta->supp_rates[band] = supp_rates |
2636 ieee80211_sta_get_mandatory_rates(local, band);
2637
2638#ifdef CONFIG_MAC80211_IBSS_DEBUG
2639 if (sta->supp_rates[band] != prev_rates)
2640 printk(KERN_DEBUG "%s: updated supp_rates set "
2641 "for %s based on beacon info (0x%llx | "
2642 "0x%llx -> 0x%llx)\n",
2643 sdata->dev->name, print_mac(mac, sta->addr),
2644 (unsigned long long) prev_rates,
2645 (unsigned long long) supp_rates,
2646 (unsigned long long) sta->supp_rates[band]);
2647#endif
2648 } else {
2649 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2650 mgmt->sa, supp_rates);
f0706e82 2651 }
f0706e82 2652
69e6c010
JB		 2653 rcu_read_unlock();
2654 }
d0709a65 2655
f709fc69 2656#ifdef CONFIG_MAC80211_MESH
ae6a44e3 2657 if (elems->mesh_config)
f698d856 2658 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
ae6a44e3 2659 elems->mesh_id_len, elems->mesh_config, freq);
f709fc69
LCC		 2660 else
2661#endif
f698d856 2662 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
ae6a44e3 2663 elems->ssid, elems->ssid_len);
f709fc69
LCC		 2664 if (!bss) {
2665#ifdef CONFIG_MAC80211_MESH
ae6a44e3 2666 if (elems->mesh_config)
f698d856 2667 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
ae6a44e3
EK		 2668 elems->mesh_id_len, elems->mesh_config,
2669 elems->mesh_config_len, freq);
f709fc69
LCC		 2670 else
2671#endif
f698d856 2672 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
ae6a44e3 2673 elems->ssid, elems->ssid_len);
f0706e82
JB		 2674 if (!bss)
2675 return;
2676 } else {
2677#if 0
2678 /* TODO: order by RSSI? */
2679 spin_lock_bh(&local->sta_bss_lock);
2680 list_move_tail(&bss->list, &local->sta_bss_list);
2681 spin_unlock_bh(&local->sta_bss_lock);
2682#endif
2683 }
2684
5628221c 2685 /* save the ERP value so that it is available at association time */
ae6a44e3
EK		 2686 if (elems->erp_info && elems->erp_info_len >= 1) {
2687 bss->erp_value = elems->erp_info[0];
5628221c
DD		 2688 bss->has_erp_value = 1;
2689 }
2690
f0706e82
JB		 2691 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2692 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82 2693
98f7dfd8
EG		 2694 if (elems->tim) {
2695 struct ieee80211_tim_ie *tim_ie =
2696 (struct ieee80211_tim_ie *)elems->tim;
2697 bss->dtim_period = tim_ie->dtim_period;
2698 }
2699
2700 /* set default value for buggy APs */
2701 if (!elems->tim || bss->dtim_period == 0)
2702 bss->dtim_period = 1;
2703
f0706e82 2704 bss->supp_rates_len = 0;
ae6a44e3 2705 if (elems->supp_rates) {
f0706e82 2706 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
ae6a44e3
EK		 2707 if (clen > elems->supp_rates_len)
2708 clen = elems->supp_rates_len;
2709 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
f0706e82
JB		 2710 clen);
2711 bss->supp_rates_len += clen;
2712 }
ae6a44e3 2713 if (elems->ext_supp_rates) {
f0706e82 2714 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
ae6a44e3
EK		 2715 if (clen > elems->ext_supp_rates_len)
2716 clen = elems->ext_supp_rates_len;
f0706e82 2717 memcpy(&bss->supp_rates[bss->supp_rates_len],
ae6a44e3 2718 elems->ext_supp_rates, clen);
f0706e82
JB		 2719 bss->supp_rates_len += clen;
2720 }
2721
8e1535d5 2722 bss->band = band;
30b89b0f 2723
5bda6175
JB		 2724 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2725
30b89b0f
JB		 2726 bss->timestamp = beacon_timestamp;
2727 bss->last_update = jiffies;
30b89b0f
JB		 2728 bss->signal = rx_status->signal;
2729 bss->noise = rx_status->noise;
566bfe5a 2730 bss->qual = rx_status->qual;
9859b81e
RR		 2731 if (!beacon)
2732 bss->last_probe_resp = jiffies;
30b89b0f
JB		 2733 /*
2734 * In STA mode, the remaining parameters should not be overridden
2735 * by beacons because they're not necessarily accurate there.
2736 */
2737 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 2738 bss->last_probe_resp && beacon) {
3e122be0 2739 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 2740 return;
2741 }
2742
43ac2ca3
JM		 2743 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2744 kfree(bss->ies);
2745 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
f0706e82 2746 }
43ac2ca3
JM		 2747 if (bss->ies) {
2748 memcpy(bss->ies, elems->ie_start, elems->total_len);
2749 bss->ies_len = elems->total_len;
2750 } else
2751 bss->ies_len = 0;
f0706e82 2752
43ac2ca3 2753 bss->wmm_used = elems->wmm_param || elems->wmm_info;
9d9bf77d
BR		 2754
2755 /* check if we need to merge IBSS */
2756 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2757 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2758 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 2759 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 2760 elems->ssid_len == sdata->u.sta.ssid_len &&
2761 memcmp(elems->ssid, sdata->u.sta.ssid,
2762 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 2763 if (rx_status->flag & RX_FLAG_TSFT) {
2764 /* in order for correct IBSS merging we need mactime
2765 *
2766 * since mactime is defined as the time the first data
2767 * symbol of the frame hits the PHY, and the timestamp
2768 * of the beacon is defined as "the time that the data
2769 * symbol containing the first bit of the timestamp is
2770 * transmitted to the PHY plus the transmitting STA’s
2771 * delays through its local PHY from the MAC-PHY
2772 * interface to its interface with the WM"
2773 * (802.11 11.1.2) - equals the time this bit arrives at
2774 * the receiver - we have to take into account the
2775 * offset between the two.
2776 * e.g: at 1 MBit that means mactime is 192 usec earlier
2777 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2778 */
8e1535d5 2779 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 2780 bitrates[rx_status->rate_idx].bitrate;
2781 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2782 } else if (local && local->ops && local->ops->get_tsf)
2783 /* second best option: get current TSF */
2784 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2785 else
2786 /* can't merge without knowing the TSF */
2787 rx_timestamp = -1LLU;
2788#ifdef CONFIG_MAC80211_IBSS_DEBUG
2789 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2790 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2791 print_mac(mac, mgmt->sa),
2792 print_mac(mac2, mgmt->bssid),
2793 (unsigned long long)rx_timestamp,
2794 (unsigned long long)beacon_timestamp,
2795 (unsigned long long)(rx_timestamp - beacon_timestamp),
2796 jiffies);
2797#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2798 if (beacon_timestamp > rx_timestamp) {
576fdeae 2799#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 2800 printk(KERN_DEBUG "%s: beacon TSF higher than "
2801 "local TSF - IBSS merge with BSSID %s\n",
f698d856 2802 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 2803#endif
f698d856
JBG		 2804 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2805 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 2806 mgmt->bssid, mgmt->sa,
8e1535d5 2807 supp_rates);
9d9bf77d
BR		 2808 }
2809 }
2810
3e122be0 2811 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2812}
2813
2814
f698d856 2815static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2816 struct ieee80211_mgmt *mgmt,
2817 size_t len,
2818 struct ieee80211_rx_status *rx_status)
2819{
ae6a44e3
EK		 2820 size_t baselen;
2821 struct ieee802_11_elems elems;
9859b81e 2822 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 2823
8e7cdbb6
TW		 2824 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2825 return; /* ignore ProbeResp to foreign address */
2826
ae6a44e3
EK		 2827 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2828 if (baselen > len)
2829 return;
2830
2831 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2832 &elems);
2833
9859b81e
RR		 2834 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2835
2836 /* direct probe may be part of the association flow */
2837 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2838 &ifsta->request)) {
2839 printk(KERN_DEBUG "%s direct probe responded\n",
2840 sdata->dev->name);
2841 ieee80211_authenticate(sdata, ifsta);
2842 }
f0706e82
JB		 2843}
2844
2845
f698d856 2846static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2847 struct ieee80211_mgmt *mgmt,
2848 size_t len,
2849 struct ieee80211_rx_status *rx_status)
2850{
f0706e82 2851 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2852 size_t baselen;
2853 struct ieee802_11_elems elems;
f698d856 2854 struct ieee80211_local *local = sdata->local;
d3c990fb 2855 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2856 u32 changed = 0;
f0706e82 2857
ae6a44e3
EK		 2858 /* Process beacon from the current BSS */
2859 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2860 if (baselen > len)
2861 return;
2862
2863 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2864
9859b81e 2865 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
f0706e82 2866
51fb61e7 2867 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2868 return;
2869 ifsta = &sdata->u.sta;
2870
d6f2da5b 2871 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2872 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2873 return;
2874
d18ef29f 2875 /* Do not send changes to driver if we are scanning. This removes
fe3fa827
JB		 2876 * requirement that a driver's bss_info_changed/conf_tx functions
2877 * need to be atomic.
2878 * This is really ugly code, we should rewrite scanning and make
2879 * all this more understandable for humans.
2880 */
d18ef29f
RC		 2881 if (local->sta_sw_scanning || local->sta_hw_scanning)
2882 return;
2883
fe3fa827
JB		 2884 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2885 elems.wmm_param_len);
2886
5628221c 2887 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2888 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2889 else {
2890 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2891 changed |= ieee80211_handle_protect_preamb(sdata, false,
2892 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2893 }
f0706e82 2894
d3c990fb 2895 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2896 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2897 struct ieee80211_ht_bss_info bss_info;
2898
2899 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2900 (struct ieee80211_ht_addt_info *)
2901 elems.ht_info_elem, &bss_info);
38668c05
TW		 2902 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2903 &bss_info);
d3c990fb
RR		 2904 }
2905
471b3efd 2906 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2907}
2908
2909
f698d856 2910static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2911 struct ieee80211_if_sta *ifsta,
2912 struct ieee80211_mgmt *mgmt,
2913 size_t len,
2914 struct ieee80211_rx_status *rx_status)
2915{
f698d856 2916 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2917 int tx_last_beacon;
2918 struct sk_buff *skb;
2919 struct ieee80211_mgmt *resp;
2920 u8 *pos, *end;
0795af57
JP		 2921 DECLARE_MAC_BUF(mac);
2922#ifdef CONFIG_MAC80211_IBSS_DEBUG
2923 DECLARE_MAC_BUF(mac2);
2924 DECLARE_MAC_BUF(mac3);
2925#endif
f0706e82 2926
51fb61e7 2927 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 2928 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2929 len < 24 + 2 || !ifsta->probe_resp)
2930 return;
2931
2932 if (local->ops->tx_last_beacon)
2933 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2934 else
2935 tx_last_beacon = 1;
2936
2937#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2938 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2939 "%s (tx_last_beacon=%d)\n",
f698d856 2940 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 2941 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2942#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2943
2944 if (!tx_last_beacon)
2945 return;
2946
2947 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2948 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2949 return;
2950
2951 end = ((u8 *) mgmt) + len;
2952 pos = mgmt->u.probe_req.variable;
2953 if (pos[0] != WLAN_EID_SSID ||
2954 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2955#ifdef CONFIG_MAC80211_IBSS_DEBUG
2956 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2957 "from %s\n",
f698d856 2958 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 2959#endif
f0706e82
JB		 2960 return;
2961 }
2962 if (pos[1] != 0 &&
2963 (pos[1] != ifsta->ssid_len ||
2964 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2965 /* Ignore ProbeReq for foreign SSID */
2966 return;
2967 }
2968
2969 /* Reply with ProbeResp */
0ec0b7ac 2970 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2971 if (!skb)
2972 return;
2973
2974 resp = (struct ieee80211_mgmt *) skb->data;
2975 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2976#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2977 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 2978 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 2979#endif /* CONFIG_MAC80211_IBSS_DEBUG */
f698d856 2980 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 2981}
2982
f698d856 2983static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
4e20cb29
JB		 2984 struct ieee80211_if_sta *ifsta,
2985 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2986 size_t len,
2987 struct ieee80211_rx_status *rx_status)
9f985b0e 2988{
f698d856 2989 struct ieee80211_local *local = sdata->local;
f709fc69 2990
9c80d3dc
JB		 2991 /* all categories we currently handle have action_code */
2992 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
9f985b0e
RR		 2993 return;
2994
2995 switch (mgmt->u.action.category) {
b6623486
AK		 2996 case WLAN_CATEGORY_SPECTRUM_MGMT:
2997 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2998 break;
2999 switch (mgmt->u.action.u.chan_switch.action_code) {
3000 case WLAN_ACTION_SPCT_MSR_REQ:
3001 if (len < (IEEE80211_MIN_ACTION_SIZE +
3002 sizeof(mgmt->u.action.u.measurement)))
3003 break;
f698d856 3004 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
b6623486
AK		 3005 break;
3006 }
3007 break;
9f985b0e
RR		 3008 case WLAN_CATEGORY_BACK:
3009 switch (mgmt->u.action.u.addba_req.action_code) {
3010 case WLAN_ACTION_ADDBA_REQ:
3011 if (len < (IEEE80211_MIN_ACTION_SIZE +
3012 sizeof(mgmt->u.action.u.addba_req)))
3013 break;
f698d856 3014 ieee80211_sta_process_addba_request(local, mgmt, len);
9f985b0e 3015 break;
eadc8d9e
RR		 3016 case WLAN_ACTION_ADDBA_RESP:
3017 if (len < (IEEE80211_MIN_ACTION_SIZE +
3018 sizeof(mgmt->u.action.u.addba_resp)))
3019 break;
f698d856 3020 ieee80211_sta_process_addba_resp(local, mgmt, len);
eadc8d9e 3021 break;
688b88a4
RR		 3022 case WLAN_ACTION_DELBA:
3023 if (len < (IEEE80211_MIN_ACTION_SIZE +
3024 sizeof(mgmt->u.action.u.delba)))
3025 break;
f698d856 3026 ieee80211_sta_process_delba(sdata, mgmt, len);
688b88a4 3027 break;
9f985b0e
RR		 3028 }
3029 break;
f709fc69 3030 case PLINK_CATEGORY:
902acc78 3031 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 3032 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
f709fc69 3033 break;
f709fc69 3034 case MESH_PATH_SEL_CATEGORY:
902acc78 3035 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 3036 mesh_rx_path_sel_frame(sdata, mgmt, len);
f709fc69 3037 break;
9f985b0e
RR		 3038 }
3039}
f0706e82 3040
f698d856 3041void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 3042 struct ieee80211_rx_status *rx_status)
3043{
f698d856 3044 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3045 struct ieee80211_if_sta *ifsta;
3046 struct ieee80211_mgmt *mgmt;
3047 u16 fc;
3048
3049 if (skb->len < 24)
3050 goto fail;
3051
f0706e82
JB		 3052 ifsta = &sdata->u.sta;
3053
3054 mgmt = (struct ieee80211_mgmt *) skb->data;
3055 fc = le16_to_cpu(mgmt->frame_control);
3056
3057 switch (fc & IEEE80211_FCTL_STYPE) {
3058 case IEEE80211_STYPE_PROBE_REQ:
3059 case IEEE80211_STYPE_PROBE_RESP:
3060 case IEEE80211_STYPE_BEACON:
f709fc69 3061 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 3062 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3063 case IEEE80211_STYPE_AUTH:
3064 case IEEE80211_STYPE_ASSOC_RESP:
3065 case IEEE80211_STYPE_REASSOC_RESP:
3066 case IEEE80211_STYPE_DEAUTH:
3067 case IEEE80211_STYPE_DISASSOC:
3068 skb_queue_tail(&ifsta->skb_queue, skb);
3069 queue_work(local->hw.workqueue, &ifsta->work);
3070 return;
f0706e82
JB		 3071 }
3072
3073 fail:
3074 kfree_skb(skb);
3075}
3076
f698d856 3077static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3078 struct sk_buff *skb)
3079{
3080 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3081 struct ieee80211_if_sta *ifsta;
3082 struct ieee80211_mgmt *mgmt;
3083 u16 fc;
3084
f0706e82
JB		 3085 ifsta = &sdata->u.sta;
3086
3087 rx_status = (struct ieee80211_rx_status *) skb->cb;
3088 mgmt = (struct ieee80211_mgmt *) skb->data;
3089 fc = le16_to_cpu(mgmt->frame_control);
3090
3091 switch (fc & IEEE80211_FCTL_STYPE) {
3092 case IEEE80211_STYPE_PROBE_REQ:
f698d856 3093 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 3094 rx_status);
3095 break;
3096 case IEEE80211_STYPE_PROBE_RESP:
f698d856 3097 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 3098 break;
3099 case IEEE80211_STYPE_BEACON:
f698d856 3100 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 3101 break;
3102 case IEEE80211_STYPE_AUTH:
f698d856 3103 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 3104 break;
3105 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 3106 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 3107 break;
3108 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 3109 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 3110 break;
3111 case IEEE80211_STYPE_DEAUTH:
f698d856 3112 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 3113 break;
3114 case IEEE80211_STYPE_DISASSOC:
f698d856 3115 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82 3116 break;
9f985b0e 3117 case IEEE80211_STYPE_ACTION:
f698d856 3118 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
9f985b0e 3119 break;
f0706e82
JB		 3120 }
3121
3122 kfree_skb(skb);
3123}
3124
3125
9ae54c84 3126ieee80211_rx_result
f698d856 3127ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
ece8eddd 3128 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 3129{
3130 struct ieee80211_mgmt *mgmt;
4e3996fe 3131 __le16 fc;
f0706e82 3132
ece8eddd 3133 if (skb->len < 2)
e4c26add 3134 return RX_DROP_UNUSABLE;
f0706e82
JB		 3135
3136 mgmt = (struct ieee80211_mgmt *) skb->data;
4e3996fe 3137 fc = mgmt->frame_control;
f0706e82 3138
4e3996fe 3139 if (ieee80211_is_ctl(fc))
9ae54c84 3140 return RX_CONTINUE;
ece8eddd
ZY		 3141
3142 if (skb->len < 24)
e4c26add 3143 return RX_DROP_MONITOR;
ece8eddd 3144
4e3996fe 3145 if (ieee80211_is_probe_resp(fc)) {
f698d856 3146 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
4e3996fe
HH		 3147 dev_kfree_skb(skb);
3148 return RX_QUEUED;
f0706e82 3149 }
4e3996fe
HH		 3150
3151 if (ieee80211_is_beacon(fc)) {
f698d856 3152 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4e3996fe
HH		 3153 dev_kfree_skb(skb);
3154 return RX_QUEUED;
3155 }
3156
9ae54c84 3157 return RX_CONTINUE;
f0706e82
JB		 3158}
3159
3160
f698d856 3161static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 3162{
f698d856 3163 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3164 int active = 0;
3165 struct sta_info *sta;
3166
d0709a65
JB		 3167 rcu_read_lock();
3168
3169 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3170 if (sta->sdata == sdata &&
f0706e82
JB		 3171 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3172 jiffies)) {
3173 active++;
3174 break;
3175 }
3176 }
d0709a65
JB		 3177
3178 rcu_read_unlock();
f0706e82
JB		 3179
3180 return active;
3181}
3182
3183
f698d856 3184static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
f0706e82 3185{
f698d856 3186 struct ieee80211_local *local = sdata->local;
f0706e82 3187 struct sta_info *sta, *tmp;
be8755e1 3188 LIST_HEAD(tmp_list);
0795af57 3189 DECLARE_MAC_BUF(mac);
d0709a65 3190 unsigned long flags;
f0706e82 3191
d0709a65 3192 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3193 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3194 if (time_after(jiffies, sta->last_rx + exp_time)) {
f4ea83dd 3195#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 3196 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
f698d856 3197 sdata->dev->name, print_mac(mac, sta->addr));
f4ea83dd 3198#endif
cb585bcc 3199 __sta_info_unlink(&sta);
d0709a65
JB		 3200 if (sta)
3201 list_add(&sta->list, &tmp_list);
f0706e82 3202 }
d0709a65 3203 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3204
d0709a65
JB		 3205 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3206 sta_info_destroy(sta);
f0706e82
JB		 3207}
3208
3209
f698d856 3210static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3211 struct ieee80211_if_sta *ifsta)
3212{
3213 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3214
f698d856
JBG		 3215 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3216 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 3217 return;
3218
3219 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 3220 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3221 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 3222}
3223
3224
f709fc69 3225#ifdef CONFIG_MAC80211_MESH
f698d856 3226static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
f709fc69
LCC		 3227 struct ieee80211_if_sta *ifsta)
3228{
f709fc69
LCC		 3229 bool free_plinks;
3230
f698d856
JBG		 3231 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3232 mesh_path_expire(sdata);
f709fc69
LCC		 3233
3234 free_plinks = mesh_plink_availables(sdata);
3235 if (free_plinks != sdata->u.sta.accepting_plinks)
9d139c81 3236 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3237
3238 mod_timer(&ifsta->timer, jiffies +
3239 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3240}
3241
3242
f698d856 3243void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
f709fc69
LCC		 3244{
3245 struct ieee80211_if_sta *ifsta;
f709fc69 3246 ifsta = &sdata->u.sta;
48c2fc59 3247 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
f709fc69 3248 ieee80211_sta_timer((unsigned long)sdata);
56a6d13d 3249 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3250}
3251#endif
3252
3253
f0706e82
JB		 3254void ieee80211_sta_timer(unsigned long data)
3255{
3256 struct ieee80211_sub_if_data *sdata =
3257 (struct ieee80211_sub_if_data *) data;
3258 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 3259 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3260
3261 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3262 queue_work(local->hw.workqueue, &ifsta->work);
3263}
3264
f0706e82
JB		 3265void ieee80211_sta_work(struct work_struct *work)
3266{
3267 struct ieee80211_sub_if_data *sdata =
3268 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
f698d856 3269 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3270 struct ieee80211_if_sta *ifsta;
3271 struct sk_buff *skb;
3272
f698d856 3273 if (!netif_running(sdata->dev))
f0706e82
JB		 3274 return;
3275
ece8eddd 3276 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3277 return;
3278
f4ea83dd
JB		 3279 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3280 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3281 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
f0706e82 3282 return;
f0706e82
JB		 3283 ifsta = &sdata->u.sta;
3284
3285 while ((skb = skb_dequeue(&ifsta->skb_queue)))
f698d856 3286 ieee80211_sta_rx_queued_mgmt(sdata, skb);
f0706e82 3287
f709fc69 3288#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3289 if (ifsta->preq_queue_len &&
3290 time_after(jiffies,
3291 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f698d856 3292 mesh_path_start_discovery(sdata);
f709fc69
LCC		 3293#endif
3294
9859b81e
RR		 3295 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3296 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
48c2fc59 3297 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
f0706e82 3298 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14 3299 if (ifsta->scan_ssid_len)
f698d856 3300 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
a0af5f14 3301 else
f698d856 3302 ieee80211_sta_start_scan(sdata, NULL, 0);
f0706e82
JB		 3303 return;
3304 }
3305
3306 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
f698d856 3307 if (ieee80211_sta_config_auth(sdata, ifsta))
f0706e82
JB		 3308 return;
3309 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3310 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3311 return;
3312
3313 switch (ifsta->state) {
48c2fc59 3314 case IEEE80211_STA_MLME_DISABLED:
f0706e82 3315 break;
9859b81e
RR		 3316 case IEEE80211_STA_MLME_DIRECT_PROBE:
3317 ieee80211_direct_probe(sdata, ifsta);
3318 break;
48c2fc59 3319 case IEEE80211_STA_MLME_AUTHENTICATE:
f698d856 3320 ieee80211_authenticate(sdata, ifsta);
f0706e82 3321 break;
48c2fc59 3322 case IEEE80211_STA_MLME_ASSOCIATE:
f698d856 3323 ieee80211_associate(sdata, ifsta);
f0706e82 3324 break;
48c2fc59 3325 case IEEE80211_STA_MLME_ASSOCIATED:
f698d856 3326 ieee80211_associated(sdata, ifsta);
f0706e82 3327 break;
48c2fc59 3328 case IEEE80211_STA_MLME_IBSS_SEARCH:
f698d856 3329 ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 3330 break;
48c2fc59 3331 case IEEE80211_STA_MLME_IBSS_JOINED:
f698d856 3332 ieee80211_sta_merge_ibss(sdata, ifsta);
f0706e82 3333 break;
f709fc69 3334#ifdef CONFIG_MAC80211_MESH
48c2fc59 3335 case IEEE80211_STA_MLME_MESH_UP:
f698d856 3336 ieee80211_mesh_housekeeping(sdata, ifsta);
f709fc69
LCC		 3337 break;
3338#endif
f0706e82 3339 default:
f4ea83dd 3340 WARN_ON(1);
f0706e82
JB		 3341 break;
3342 }
3343
f698d856 3344 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 3345 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
f698d856 3346 "mixed-cell disabled - disassociate\n", sdata->dev->name);
f0706e82 3347
f698d856
JBG		 3348 ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED);
3349 ieee80211_set_disassoc(sdata, ifsta, 0);
f0706e82
JB		 3350 }
3351}
3352
3353
f698d856 3354static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3355 struct ieee80211_if_sta *ifsta)
3356{
f698d856 3357 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3358
3359 if (local->ops->reset_tsf) {
3360 /* Reset own TSF to allow time synchronization work. */
3361 local->ops->reset_tsf(local_to_hw(local));
3362 }
3363
3364 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3365
3366
3367 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3368 ifsta->auth_alg = WLAN_AUTH_OPEN;
3369 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3370 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3371 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3372 ifsta->auth_alg = WLAN_AUTH_LEAP;
3373 else
3374 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 3375 ifsta->auth_transaction = -1;
d6f2da5b 3376 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 3377 ifsta->assoc_scan_tries = 0;
9859b81e 3378 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 3379 ifsta->auth_tries = 0;
3380 ifsta->assoc_tries = 0;
f698d856 3381 netif_carrier_off(sdata->dev);
f0706e82
JB		 3382}
3383
3384
f698d856 3385void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3386 struct ieee80211_if_sta *ifsta)
3387{
f698d856 3388 struct ieee80211_local *local = sdata->local;
f0706e82 3389
51fb61e7 3390 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3391 return;
3392
d6f2da5b
JS		 3393 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3394 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3395 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3396 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3397 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3398 queue_work(local->hw.workqueue, &ifsta->work);
3399 }
3400}
3401
3402static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3403 const char *ssid, int ssid_len)
3404{
3405 int tmp, hidden_ssid;
3406
48225709
MW		 3407 if (ssid_len == ifsta->ssid_len &&
3408 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3409 return 1;
3410
d6f2da5b 3411 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3412 return 0;
3413
3414 hidden_ssid = 1;
3415 tmp = ssid_len;
3416 while (tmp--) {
3417 if (ssid[tmp] != '\0') {
3418 hidden_ssid = 0;
3419 break;
3420 }
3421 }
3422
3423 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3424 return 1;
3425
3426 if (ssid_len == 1 && ssid[0] == ' ')
3427 return 1;
3428
3429 return 0;
3430}
3431
f698d856 3432static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3433 struct ieee80211_if_sta *ifsta)
3434{
f698d856 3435 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3436 struct ieee80211_sta_bss *bss, *selected = NULL;
3437 int top_rssi = 0, freq;
3438
f0706e82 3439 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3440 freq = local->oper_channel->center_freq;
f0706e82
JB		 3441 list_for_each_entry(bss, &local->sta_bss_list, list) {
3442 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3443 continue;
3444
34a961f7
AK		 3445 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3446 IEEE80211_STA_AUTO_BSSID_SEL |
3447 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3448 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3449 !!sdata->default_key))
f0706e82
JB		 3450 continue;
3451
d6f2da5b
JS		 3452 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3453 bss->freq != freq)
f0706e82
JB		 3454 continue;
3455
d6f2da5b 3456 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3457 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3458 continue;
3459
d6f2da5b 3460 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3461 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3462 continue;
3463
566bfe5a 3464 if (!selected || top_rssi < bss->signal) {
f0706e82 3465 selected = bss;
566bfe5a 3466 top_rssi = bss->signal;
f0706e82
JB		 3467 }
3468 }
3469 if (selected)
3470 atomic_inc(&selected->users);
3471 spin_unlock_bh(&local->sta_bss_lock);
3472
3473 if (selected) {
f698d856 3474 ieee80211_set_freq(sdata, selected->freq);
d6f2da5b 3475 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f698d856 3476 ieee80211_sta_set_ssid(sdata, selected->ssid,
f0706e82 3477 selected->ssid_len);
f698d856
JBG		 3478 ieee80211_sta_set_bssid(sdata, selected->bssid);
3479 ieee80211_sta_def_wmm_params(sdata, selected, 0);
9859b81e
RR		 3480
3481 /* Send out direct probe if no probe resp was received or
3482 * the one we have is outdated
3483 */
3484 if (!selected->last_probe_resp ||
3485 time_after(jiffies, selected->last_probe_resp
3486 + IEEE80211_SCAN_RESULT_EXPIRE))
3487 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3488 else
3489 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3490
3e122be0 3491 ieee80211_rx_bss_put(local, selected);
f698d856 3492 ieee80211_sta_reset_auth(sdata, ifsta);
f0706e82
JB		 3493 return 0;
3494 } else {
6042a3e3
RR		 3495 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3496 ifsta->assoc_scan_tries++;
d6f2da5b 3497 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
f698d856 3498 ieee80211_sta_start_scan(sdata, NULL, 0);
b9bf1e60 3499 else
f698d856 3500 ieee80211_sta_start_scan(sdata, ifsta->ssid,
b9bf1e60 3501 ifsta->ssid_len);
48c2fc59 3502 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82
JB		 3503 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3504 } else
48c2fc59 3505 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82 3506 }
f0706e82
JB		 3507 return -1;
3508}
3509
f0706e82 3510
f698d856 3511static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3512 struct ieee80211_if_sta *ifsta)
3513{
f698d856 3514 struct ieee80211_local *local = sdata->local;
f0706e82 3515 struct ieee80211_sta_bss *bss;
8318d78a 3516 struct ieee80211_supported_band *sband;
f0706e82
JB		 3517 u8 bssid[ETH_ALEN], *pos;
3518 int i;
167ad6f7 3519 int ret;
0795af57 3520 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3521
3522#if 0
3523 /* Easier testing, use fixed BSSID. */
3524 memset(bssid, 0xfe, ETH_ALEN);
3525#else
3526 /* Generate random, not broadcast, locally administered BSSID. Mix in
3527 * own MAC address to make sure that devices that do not have proper
3528 * random number generator get different BSSID. */
3529 get_random_bytes(bssid, ETH_ALEN);
3530 for (i = 0; i < ETH_ALEN; i++)
f698d856 3531 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 3532 bssid[0] &= ~0x01;
3533 bssid[0] |= 0x02;
3534#endif
3535
0795af57 3536 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 3537 sdata->dev->name, print_mac(mac, bssid));
f0706e82 3538
f698d856 3539 bss = ieee80211_rx_bss_add(sdata, bssid,
8318d78a 3540 local->hw.conf.channel->center_freq,
cffdd30d 3541 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3542 if (!bss)
3543 return -ENOMEM;
3544
8318d78a
JB		 3545 bss->band = local->hw.conf.channel->band;
3546 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3547
3548 if (local->hw.conf.beacon_int == 0)
dc0ae30c 3549 local->hw.conf.beacon_int = 100;
f0706e82 3550 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3551 bss->last_update = jiffies;
3552 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 3553
3554 if (sdata->default_key)
f0706e82 3555 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 3556 else
f0706e82 3557 sdata->drop_unencrypted = 0;
988c0f72 3558
8318d78a 3559 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3560 pos = bss->supp_rates;
8318d78a
JB		 3561 for (i = 0; i < sband->n_bitrates; i++) {
3562 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3563 *pos++ = (u8) (rate / 5);
3564 }
3565
f698d856 3566 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 3567 ieee80211_rx_bss_put(local, bss);
167ad6f7 3568 return ret;
f0706e82
JB		 3569}
3570
3571
f698d856 3572static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3573 struct ieee80211_if_sta *ifsta)
3574{
f698d856 3575 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3576 struct ieee80211_sta_bss *bss;
3577 int found = 0;
3578 u8 bssid[ETH_ALEN];
3579 int active_ibss;
0795af57
JP		 3580 DECLARE_MAC_BUF(mac);
3581 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3582
3583 if (ifsta->ssid_len == 0)
3584 return -EINVAL;
3585
f698d856 3586 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 3587#ifdef CONFIG_MAC80211_IBSS_DEBUG
3588 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 3589 sdata->dev->name, active_ibss);
f0706e82
JB		 3590#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3591 spin_lock_bh(&local->sta_bss_lock);
3592 list_for_each_entry(bss, &local->sta_bss_list, list) {
3593 if (ifsta->ssid_len != bss->ssid_len ||
3594 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3595 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3596 continue;
3597#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3598 printk(KERN_DEBUG " bssid=%s found\n",
3599 print_mac(mac, bss->bssid));
f0706e82
JB		 3600#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3601 memcpy(bssid, bss->bssid, ETH_ALEN);
3602 found = 1;
3603 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3604 break;
3605 }
3606 spin_unlock_bh(&local->sta_bss_lock);
3607
3608#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 3609 if (found)
3610 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3611 "%s\n", print_mac(mac, bssid),
3612 print_mac(mac2, ifsta->bssid));
f0706e82 3613#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 3614
3615 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 3616 int ret;
80693ceb
DD		 3617 int search_freq;
3618
3619 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3620 search_freq = bss->freq;
3621 else
3622 search_freq = local->hw.conf.channel->center_freq;
3623
f698d856 3624 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 3625 ifsta->ssid, ifsta->ssid_len);
3626 if (!bss)
3627 goto dont_join;
3628
0795af57 3629 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3630 " based on configured SSID\n",
f698d856
JBG		 3631 sdata->dev->name, print_mac(mac, bssid));
3632 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 3633 ieee80211_rx_bss_put(local, bss);
167ad6f7 3634 return ret;
f0706e82 3635 }
80693ceb
DD		 3636
3637dont_join:
f0706e82
JB		 3638#ifdef CONFIG_MAC80211_IBSS_DEBUG
3639 printk(KERN_DEBUG " did not try to join ibss\n");
3640#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3641
3642 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 3643 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 3644 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 3645 mod_timer(&ifsta->timer, jiffies +
3646 IEEE80211_IBSS_MERGE_INTERVAL);
3647 } else if (time_after(jiffies, local->last_scan_completed +
3648 IEEE80211_SCAN_INTERVAL)) {
3649 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 3650 "join\n", sdata->dev->name);
3651 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 3652 ifsta->ssid_len);
48c2fc59 3653 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 3654 int interval = IEEE80211_SCAN_INTERVAL;
3655
3656 if (time_after(jiffies, ifsta->ibss_join_req +
3657 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3658 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3659 (!(local->oper_channel->flags &
3660 IEEE80211_CHAN_NO_IBSS)))
f698d856 3661 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 3662 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 3663 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 3664 " %d MHz\n", sdata->dev->name,
8318d78a 3665 local->hw.conf.channel->center_freq);
f0706e82
JB		 3666 }
3667
3668 /* No IBSS found - decrease scan interval and continue
3669 * scanning. */
3670 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3671 }
3672
48c2fc59 3673 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 3674 mod_timer(&ifsta->timer, jiffies + interval);
3675 return 0;
3676 }
3677
3678 return 0;
3679}
3680
3681
f698d856 3682int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
f0706e82 3683{
f0706e82 3684 struct ieee80211_if_sta *ifsta;
9d139c81 3685 int res;
f0706e82
JB		 3686
3687 if (len > IEEE80211_MAX_SSID_LEN)
3688 return -EINVAL;
3689
f0706e82
JB		 3690 ifsta = &sdata->u.sta;
3691
9d139c81
JB		 3692 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3693 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3694 memcpy(ifsta->ssid, ssid, len);
3695 ifsta->ssid_len = len;
d6f2da5b 3696 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 3697
3698 res = 0;
3699 /*
3700 * Hack! MLME code needs to be cleaned up to have different
3701 * entry points for configuration and internal selection change
3702 */
3703 if (netif_running(sdata->dev))
3704 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3705 if (res) {
3706 printk(KERN_DEBUG "%s: Failed to config new SSID to "
f698d856 3707 "the low-level driver\n", sdata->dev->name);
9d139c81
JB		 3708 return res;
3709 }
3710 }
f0706e82 3711
d6f2da5b
JS		 3712 if (len)
3713 ifsta->flags |= IEEE80211_STA_SSID_SET;
3714 else
3715 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 3716
51fb61e7 3717 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3718 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82 3719 ifsta->ibss_join_req = jiffies;
48c2fc59 3720 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f698d856 3721 return ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 3722 }
9d139c81 3723
f0706e82
JB		 3724 return 0;
3725}
3726
3727
f698d856 3728int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
f0706e82 3729{
f0706e82
JB		 3730 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3731 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3732 *len = ifsta->ssid_len;
3733 return 0;
3734}
3735
3736
f698d856 3737int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
f0706e82 3738{
f0706e82
JB		 3739 struct ieee80211_if_sta *ifsta;
3740 int res;
3741
f0706e82
JB		 3742 ifsta = &sdata->u.sta;
3743
3744 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3745 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 3746 res = 0;
3747 /*
3748 * Hack! See also ieee80211_sta_set_ssid.
3749 */
3750 if (netif_running(sdata->dev))
3751 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 3752 if (res) {
3753 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
f698d856 3754 "the low-level driver\n", sdata->dev->name);
f0706e82
JB		 3755 return res;
3756 }
3757 }
3758
d6f2da5b
JS		 3759 if (is_valid_ether_addr(bssid))
3760 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3761 else
d6f2da5b
JS		 3762 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3763
f0706e82
JB		 3764 return 0;
3765}
3766
3767
3768static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3769 struct ieee80211_sub_if_data *sdata,
3770 int powersave)
3771{
3772 struct sk_buff *skb;
3773 struct ieee80211_hdr *nullfunc;
4e3996fe 3774 __le16 fc;
f0706e82
JB		 3775
3776 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3777 if (!skb) {
3778 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3779 "frame\n", sdata->dev->name);
3780 return;
3781 }
3782 skb_reserve(skb, local->hw.extra_tx_headroom);
3783
3784 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3785 memset(nullfunc, 0, 24);
4e3996fe
HH		 3786 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3787 IEEE80211_FCTL_TODS);
f0706e82 3788 if (powersave)
4e3996fe
HH		 3789 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3790 nullfunc->frame_control = fc;
f0706e82
JB		 3791 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3792 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3793 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3794
f698d856 3795 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 3796}
3797
3798
69d3b6f4
JB		 3799static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3800{
3801 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3802 ieee80211_vif_is_mesh(&sdata->vif))
3803 ieee80211_sta_timer((unsigned long)sdata);
3804}
3805
f0706e82
JB		 3806void ieee80211_scan_completed(struct ieee80211_hw *hw)
3807{
3808 struct ieee80211_local *local = hw_to_local(hw);
3809 struct net_device *dev = local->scan_dev;
3810 struct ieee80211_sub_if_data *sdata;
3811 union iwreq_data wrqu;
3812
3813 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3814 memset(&wrqu, 0, sizeof(wrqu));
3815 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3816
ece8eddd
ZY		 3817 if (local->sta_hw_scanning) {
3818 local->sta_hw_scanning = 0;
675ef586
MA		 3819 if (ieee80211_hw_config(local))
3820 printk(KERN_DEBUG "%s: failed to restore operational "
3821 "channel after scan\n", dev->name);
69d3b6f4
JB		 3822 /* Restart STA timer for HW scan case */
3823 rcu_read_lock();
3824 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3825 ieee80211_restart_sta_timer(sdata);
3826 rcu_read_unlock();
3827
ece8eddd
ZY		 3828 goto done;
3829 }
3830
3831 local->sta_sw_scanning = 0;
f0706e82 3832 if (ieee80211_hw_config(local))
4b50e388 3833 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3834 "channel after scan\n", dev->name);
3835
4150c572
JB		 3836
3837 netif_tx_lock_bh(local->mdev);
e308a5d8 3838 netif_addr_lock(local->mdev);
4150c572
JB		 3839 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3840 local->ops->configure_filter(local_to_hw(local),
3841 FIF_BCN_PRBRESP_PROMISC,
3842 &local->filter_flags,
3843 local->mdev->mc_count,
3844 local->mdev->mc_list);
3845
e308a5d8 3846 netif_addr_unlock(local->mdev);
4150c572 3847 netif_tx_unlock_bh(local->mdev);
f0706e82 3848
79010420
JB		 3849 rcu_read_lock();
3850 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
69d3b6f4
JB		 3851 /* Tell AP we're back */
3852 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3853 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3854 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3855
69d3b6f4 3856 ieee80211_restart_sta_timer(sdata);
f709fc69 3857
f0706e82
JB		 3858 netif_wake_queue(sdata->dev);
3859 }
79010420 3860 rcu_read_unlock();
f0706e82 3861
ece8eddd 3862done:
f0706e82 3863 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3864 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3865 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3866 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
48c2fc59 3867 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
f698d856
JBG		 3868 !ieee80211_sta_active_ibss(sdata)))
3869 ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82
JB		 3870 }
3871}
3872EXPORT_SYMBOL(ieee80211_scan_completed);
3873
3874void ieee80211_sta_scan_work(struct work_struct *work)
3875{
3876 struct ieee80211_local *local =
3877 container_of(work, struct ieee80211_local, scan_work.work);
3878 struct net_device *dev = local->scan_dev;
3879 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3880 struct ieee80211_supported_band *sband;
f0706e82
JB		 3881 struct ieee80211_channel *chan;
3882 int skip;
3883 unsigned long next_delay = 0;
3884
ece8eddd 3885 if (!local->sta_sw_scanning)
f0706e82
JB		 3886 return;
3887
3888 switch (local->scan_state) {
3889 case SCAN_SET_CHANNEL:
69d464d5
JB		 3890 /*
3891 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3892 * after we successfully scanned the last channel of the last
3893 * band (and the last band is supported by the hw)
3894 */
8318d78a
JB		 3895 if (local->scan_band < IEEE80211_NUM_BANDS)
3896 sband = local->hw.wiphy->bands[local->scan_band];
3897 else
3898 sband = NULL;
3899
69d464d5
JB		 3900 /*
3901 * If we are at an unsupported band and have more bands
3902 * left to scan, advance to the next supported one.
3903 */
3904 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3905 local->scan_band++;
3906 sband = local->hw.wiphy->bands[local->scan_band];
3907 local->scan_channel_idx = 0;
3908 }
3909
69d464d5
JB		 3910 /* if no more bands/channels left, complete scan */
3911 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3912 ieee80211_scan_completed(local_to_hw(local));
3913 return;
3914 }
8318d78a
JB		 3915 skip = 0;
3916 chan = &sband->channels[local->scan_channel_idx];
3917
3918 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3919 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3920 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3921 skip = 1;
3922
3923 if (!skip) {
f0706e82
JB		 3924 local->scan_channel = chan;
3925 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3926 printk(KERN_DEBUG "%s: failed to set freq to "
3927 "%d MHz for scan\n", dev->name,
3928 chan->center_freq);
f0706e82
JB		 3929 skip = 1;
3930 }
3931 }
3932
69d464d5 3933 /* advance state machine to next channel/band */
f0706e82 3934 local->scan_channel_idx++;
8318d78a 3935 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3936 /*
3937 * scan_band may end up == IEEE80211_NUM_BANDS, but
3938 * we'll catch that case above and complete the scan
3939 * if that is the case.
3940 */
8318d78a
JB		 3941 local->scan_band++;
3942 local->scan_channel_idx = 0;
f0706e82
JB		 3943 }
3944
3945 if (skip)
3946 break;
3947
3948 next_delay = IEEE80211_PROBE_DELAY +
3949 usecs_to_jiffies(local->hw.channel_change_time);
3950 local->scan_state = SCAN_SEND_PROBE;
3951 break;
3952 case SCAN_SEND_PROBE:
8318d78a 3953 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3954 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3955
3956 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3957 break;
f698d856 3958 ieee80211_send_probe_req(sdata, NULL, local->scan_ssid,
8318d78a
JB		 3959 local->scan_ssid_len);
3960 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3961 break;
3962 }
3963
ece8eddd 3964 if (local->sta_sw_scanning)
f0706e82
JB		 3965 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3966 next_delay);
3967}
3968
3969
f698d856 3970static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata,
f0706e82
JB		 3971 u8 *ssid, size_t ssid_len)
3972{
f698d856 3973 struct ieee80211_local *local = scan_sdata->local;
f0706e82
JB		 3974 struct ieee80211_sub_if_data *sdata;
3975
3976 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3977 return -EINVAL;
3978
3979 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3980 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3981 * BSSID: MACAddress
3982 * SSID
3983 * ScanType: ACTIVE, PASSIVE
3984 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3985 * a Probe frame during active scanning
3986 * ChannelList
3987 * MinChannelTime (>= ProbeDelay), in TU
3988 * MaxChannelTime: (>= MinChannelTime), in TU
3989 */
3990
3991 /* MLME-SCAN.confirm
3992 * BSSDescriptionSet
3993 * ResultCode: SUCCESS, INVALID_PARAMETERS
3994 */
3995
ece8eddd 3996 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f698d856 3997 if (local->scan_dev == scan_sdata->dev)
f0706e82
JB		 3998 return 0;
3999 return -EBUSY;
4000 }
4001
4002 if (local->ops->hw_scan) {
4003 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 4004 ssid, ssid_len);
f0706e82 4005 if (!rc) {
ece8eddd 4006 local->sta_hw_scanning = 1;
f698d856 4007 local->scan_dev = scan_sdata->dev;
f0706e82
JB		 4008 }
4009 return rc;
4010 }
4011
ece8eddd 4012 local->sta_sw_scanning = 1;
f0706e82 4013
79010420
JB		 4014 rcu_read_lock();
4015 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
f0706e82 4016 netif_stop_queue(sdata->dev);
51fb61e7 4017 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 4018 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4019 ieee80211_send_nullfunc(local, sdata, 1);
4020 }
79010420 4021 rcu_read_unlock();
f0706e82
JB		 4022
4023 if (ssid) {
4024 local->scan_ssid_len = ssid_len;
4025 memcpy(local->scan_ssid, ssid, ssid_len);
4026 } else
4027 local->scan_ssid_len = 0;
4028 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 4029 local->scan_channel_idx = 0;
8318d78a 4030 local->scan_band = IEEE80211_BAND_2GHZ;
f698d856 4031 local->scan_dev = scan_sdata->dev;
f0706e82 4032
b9e40857 4033 netif_addr_lock_bh(local->mdev);
4150c572
JB		 4034 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4035 local->ops->configure_filter(local_to_hw(local),
4036 FIF_BCN_PRBRESP_PROMISC,
4037 &local->filter_flags,
4038 local->mdev->mc_count,
4039 local->mdev->mc_list);
b9e40857 4040 netif_addr_unlock_bh(local->mdev);
f0706e82
JB		 4041
4042 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4043 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4044 IEEE80211_CHANNEL_TIME);
4045
4046 return 0;
4047}
4048
4049
f698d856 4050int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len)
f0706e82 4051{
f0706e82 4052 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 4053 struct ieee80211_local *local = sdata->local;
f0706e82 4054
51fb61e7 4055 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f698d856 4056 return ieee80211_sta_start_scan(sdata, ssid, ssid_len);
f0706e82 4057
ece8eddd 4058 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f698d856 4059 if (local->scan_dev == sdata->dev)
f0706e82
JB		 4060 return 0;
4061 return -EBUSY;
4062 }
4063
a0af5f14
HS		 4064 ifsta->scan_ssid_len = ssid_len;
4065 if (ssid_len)
4066 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 4067 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4068 queue_work(local->hw.workqueue, &ifsta->work);
4069 return 0;
4070}
4071
43ac2ca3
JM		 4072
4073static void ieee80211_sta_add_scan_ies(struct iw_request_info *info,
4074 struct ieee80211_sta_bss *bss,
4075 char **current_ev, char *end_buf)
4076{
4077 u8 *pos, *end, *next;
4078 struct iw_event iwe;
4079
4080 if (bss == NULL || bss->ies == NULL)
4081 return;
4082
4083 /*
4084 * If needed, fragment the IEs buffer (at IE boundaries) into short
4085 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
4086 */
4087 pos = bss->ies;
4088 end = pos + bss->ies_len;
4089
4090 while (end - pos > IW_GENERIC_IE_MAX) {
4091 next = pos + 2 + pos[1];
4092 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
4093 next = next + 2 + next[1];
4094
4095 memset(&iwe, 0, sizeof(iwe));
4096 iwe.cmd = IWEVGENIE;
4097 iwe.u.data.length = next - pos;
4098 *current_ev = iwe_stream_add_point(info, *current_ev,
4099 end_buf, &iwe, pos);
4100
4101 pos = next;
4102 }
4103
4104 if (end > pos) {
4105 memset(&iwe, 0, sizeof(iwe));
4106 iwe.cmd = IWEVGENIE;
4107 iwe.u.data.length = end - pos;
4108 *current_ev = iwe_stream_add_point(info, *current_ev,
4109 end_buf, &iwe, pos);
4110 }
4111}
4112
4113
f0706e82 4114static char *
f698d856 4115ieee80211_sta_scan_result(struct ieee80211_local *local,
ccc58057 4116 struct iw_request_info *info,
f0706e82
JB		 4117 struct ieee80211_sta_bss *bss,
4118 char *current_ev, char *end_buf)
4119{
f0706e82
JB		 4120 struct iw_event iwe;
4121
4122 if (time_after(jiffies,
4123 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4124 return current_ev;
4125
f0706e82
JB		 4126 memset(&iwe, 0, sizeof(iwe));
4127 iwe.cmd = SIOCGIWAP;
4128 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4129 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
ccc58057 4130 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82
JB		 4131 IW_EV_ADDR_LEN);
4132
4133 memset(&iwe, 0, sizeof(iwe));
4134 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 4135 if (bss_mesh_cfg(bss)) {
4136 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69 4137 iwe.u.data.flags = 1;
ccc58057
DM		 4138 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4139 &iwe, bss_mesh_id(bss));
f709fc69
LCC		 4140 } else {
4141 iwe.u.data.length = bss->ssid_len;
4142 iwe.u.data.flags = 1;
ccc58057
DM		 4143 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4144 &iwe, bss->ssid);
f709fc69 4145 }
f0706e82 4146
1d1b5359
LCC		 4147 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4148 || bss_mesh_cfg(bss)) {
f0706e82
JB		 4149 memset(&iwe, 0, sizeof(iwe));
4150 iwe.cmd = SIOCGIWMODE;
902acc78 4151 if (bss_mesh_cfg(bss))
f709fc69
LCC		 4152 iwe.u.mode = IW_MODE_MESH;
4153 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 4154 iwe.u.mode = IW_MODE_MASTER;
4155 else
4156 iwe.u.mode = IW_MODE_ADHOC;
ccc58057
DM		 4157 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4158 &iwe, IW_EV_UINT_LEN);
f0706e82
JB		 4159 }
4160
4161 memset(&iwe, 0, sizeof(iwe));
4162 iwe.cmd = SIOCGIWFREQ;
9381be05
TW		 4163 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4164 iwe.u.freq.e = 0;
ccc58057 4165 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82 4166 IW_EV_FREQ_LEN);
8318d78a
JB		 4167
4168 memset(&iwe, 0, sizeof(iwe));
4169 iwe.cmd = SIOCGIWFREQ;
9381be05
TW		 4170 iwe.u.freq.m = bss->freq;
4171 iwe.u.freq.e = 6;
ccc58057 4172 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82 4173 IW_EV_FREQ_LEN);
f0706e82
JB		 4174 memset(&iwe, 0, sizeof(iwe));
4175 iwe.cmd = IWEVQUAL;
566bfe5a
BR		 4176 iwe.u.qual.qual = bss->qual;
4177 iwe.u.qual.level = bss->signal;
f0706e82
JB		 4178 iwe.u.qual.noise = bss->noise;
4179 iwe.u.qual.updated = local->wstats_flags;
ccc58057 4180 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82
JB		 4181 IW_EV_QUAL_LEN);
4182
4183 memset(&iwe, 0, sizeof(iwe));
4184 iwe.cmd = SIOCGIWENCODE;
4185 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4186 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4187 else
4188 iwe.u.data.flags = IW_ENCODE_DISABLED;
4189 iwe.u.data.length = 0;
ccc58057
DM		 4190 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4191 &iwe, "");
f0706e82 4192
43ac2ca3 4193 ieee80211_sta_add_scan_ies(info, bss, &current_ev, end_buf);
e623157b 4194
f0706e82
JB		 4195 if (bss && bss->supp_rates_len > 0) {
4196 /* display all supported rates in readable format */
ccc58057 4197 char *p = current_ev + iwe_stream_lcp_len(info);
f0706e82
JB		 4198 int i;
4199
4200 memset(&iwe, 0, sizeof(iwe));
4201 iwe.cmd = SIOCGIWRATE;
4202 /* Those two flags are ignored... */
4203 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4204
4205 for (i = 0; i < bss->supp_rates_len; i++) {
4206 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4207 0x7f) * 500000);
ccc58057 4208 p = iwe_stream_add_value(info, current_ev, p,
f0706e82
JB		 4209 end_buf, &iwe, IW_EV_PARAM_LEN);
4210 }
4211 current_ev = p;
4212 }
4213
4214 if (bss) {
4215 char *buf;
4216 buf = kmalloc(30, GFP_ATOMIC);
4217 if (buf) {
4218 memset(&iwe, 0, sizeof(iwe));
4219 iwe.cmd = IWEVCUSTOM;
4220 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4221 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4222 current_ev = iwe_stream_add_point(info, current_ev,
4223 end_buf,
f0706e82 4224 &iwe, buf);
bf998f68
EG		 4225 memset(&iwe, 0, sizeof(iwe));
4226 iwe.cmd = IWEVCUSTOM;
4227 sprintf(buf, " Last beacon: %dms ago",
4228 jiffies_to_msecs(jiffies - bss->last_update));
4229 iwe.u.data.length = strlen(buf);
4230 current_ev = iwe_stream_add_point(info, current_ev,
4231 end_buf, &iwe, buf);
f0706e82
JB		 4232 kfree(buf);
4233 }
4234 }
4235
902acc78 4236 if (bss_mesh_cfg(bss)) {
f709fc69 4237 char *buf;
24736701 4238 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 4239 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 4240 if (buf) {
4241 memset(&iwe, 0, sizeof(iwe));
4242 iwe.cmd = IWEVCUSTOM;
24736701 4243 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4f5d4c4d 4244 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4245 current_ev = iwe_stream_add_point(info, current_ev,
4246 end_buf,
4f5d4c4d
LCC		 4247 &iwe, buf);
4248 sprintf(buf, "Path Selection Protocol ID: "
24736701
JL		 4249 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4250 cfg[4]);
4f5d4c4d 4251 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4252 current_ev = iwe_stream_add_point(info, current_ev,
4253 end_buf,
4f5d4c4d
LCC		 4254 &iwe, buf);
4255 sprintf(buf, "Path Selection Metric ID: "
24736701
JL		 4256 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4257 cfg[8]);
4f5d4c4d 4258 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4259 current_ev = iwe_stream_add_point(info, current_ev,
4260 end_buf,
4f5d4c4d
LCC		 4261 &iwe, buf);
4262 sprintf(buf, "Congestion Control Mode ID: "
24736701
JL		 4263 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4264 cfg[11], cfg[12]);
4f5d4c4d 4265 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4266 current_ev = iwe_stream_add_point(info, current_ev,
4267 end_buf,
4f5d4c4d
LCC		 4268 &iwe, buf);
4269 sprintf(buf, "Channel Precedence: "
24736701
JL		 4270 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4271 cfg[15], cfg[16]);
f709fc69 4272 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4273 current_ev = iwe_stream_add_point(info, current_ev,
4274 end_buf,
f709fc69
LCC		 4275 &iwe, buf);
4276 kfree(buf);
4277 }
4278 }
4279
f0706e82
JB		 4280 return current_ev;
4281}
4282
4283
f698d856 4284int ieee80211_sta_scan_results(struct ieee80211_local *local,
ccc58057
DM		 4285 struct iw_request_info *info,
4286 char *buf, size_t len)
f0706e82 4287{
f0706e82
JB		 4288 char *current_ev = buf;
4289 char *end_buf = buf + len;
4290 struct ieee80211_sta_bss *bss;
4291
4292 spin_lock_bh(&local->sta_bss_lock);
4293 list_for_each_entry(bss, &local->sta_bss_list, list) {
4294 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4295 spin_unlock_bh(&local->sta_bss_lock);
4296 return -E2BIG;
4297 }
f698d856 4298 current_ev = ieee80211_sta_scan_result(local, info, bss,
ccc58057 4299 current_ev, end_buf);
f0706e82
JB		 4300 }
4301 spin_unlock_bh(&local->sta_bss_lock);
4302 return current_ev - buf;
4303}
4304
4305
f698d856 4306int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
f0706e82 4307{
f0706e82 4308 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 4309
f0706e82
JB		 4310 kfree(ifsta->extra_ie);
4311 if (len == 0) {
4312 ifsta->extra_ie = NULL;
4313 ifsta->extra_ie_len = 0;
4314 return 0;
4315 }
4316 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4317 if (!ifsta->extra_ie) {
4318 ifsta->extra_ie_len = 0;
4319 return -ENOMEM;
4320 }
4321 memcpy(ifsta->extra_ie, ie, len);
4322 ifsta->extra_ie_len = len;
4323 return 0;
4324}
4325
4326
f698d856 4327struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 4328 struct sk_buff *skb, u8 *bssid,
87291c02 4329 u8 *addr, u64 supp_rates)
f0706e82 4330{
f698d856 4331 struct ieee80211_local *local = sdata->local;
f0706e82 4332 struct sta_info *sta;
0795af57 4333 DECLARE_MAC_BUF(mac);
87291c02 4334 int band = local->hw.conf.channel->band;
f0706e82
JB		 4335
4336 /* TODO: Could consider removing the least recently used entry and
4337 * allow new one to be added. */
4338 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4339 if (net_ratelimit()) {
4340 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 4341 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 4342 }
4343 return NULL;
4344 }
4345
1e188637 4346 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 4347 return NULL;
4348
f4ea83dd 4349#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 4350 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 4351 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 4352#endif
f0706e82 4353
73651ee6
JB		 4354 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4355 if (!sta)
f0706e82
JB		 4356 return NULL;
4357
07346f81 4358 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 4359
8e1535d5
EG		 4360 /* make sure mandatory rates are always added */
4361 sta->supp_rates[band] = supp_rates |
4362 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 4363
4364 rate_control_rate_init(sta, local);
4365
93e5deb1 4366 if (sta_info_insert(sta))
73651ee6 4367 return NULL;
73651ee6 4368
d0709a65 4369 return sta;
f0706e82
JB		 4370}
4371
4372
f698d856 4373int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 4374{
f0706e82
JB		 4375 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4376
f4ea83dd 4377 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 4378 sdata->dev->name, reason);
f0706e82 4379
51fb61e7
JB		 4380 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4381 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4382 return -EINVAL;
4383
f698d856
JBG		 4384 ieee80211_send_deauth(sdata, ifsta, reason);
4385 ieee80211_set_disassoc(sdata, ifsta, 1);
f0706e82
JB		 4386 return 0;
4387}
4388
4389
f698d856 4390int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 4391{
f0706e82
JB		 4392 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4393
f4ea83dd 4394 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 4395 sdata->dev->name, reason);
f0706e82 4396
51fb61e7 4397 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4398 return -EINVAL;
4399
d6f2da5b 4400 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4401 return -1;
4402
f698d856
JBG		 4403 ieee80211_send_disassoc(sdata, ifsta, reason);
4404 ieee80211_set_disassoc(sdata, ifsta, 0);
f0706e82
JB		 4405 return 0;
4406}
84363e6e
MA		 4407
4408void ieee80211_notify_mac(struct ieee80211_hw *hw,
4409 enum ieee80211_notification_types notif_type)
4410{
4411 struct ieee80211_local *local = hw_to_local(hw);
4412 struct ieee80211_sub_if_data *sdata;
4413
4414 switch (notif_type) {
4415 case IEEE80211_NOTIFY_RE_ASSOC:
4416 rcu_read_lock();
4417 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 4418 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4419 continue;
84363e6e 4420
f698d856 4421 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 4422 }
4423 rcu_read_unlock();
4424 break;
4425 }
4426}
4427EXPORT_SYMBOL(ieee80211_notify_mac);
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