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iwlwifi: use dtim_period from association, and set listen_interval
[mirror_ubuntu-zesty-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
JB		 36
37#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40#define IEEE80211_ASSOC_MAX_TRIES 3
41#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
f709fc69 42#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
f0706e82
JB		 43#define IEEE80211_PROBE_INTERVAL (60 * HZ)
44#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45#define IEEE80211_SCAN_INTERVAL (2 * HZ)
46#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 47#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82
JB		 48
49#define IEEE80211_PROBE_DELAY (HZ / 33)
50#define IEEE80211_CHANNEL_TIME (HZ / 33)
51#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 55#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 56
57#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
f0706e82
JB		 60#define ERP_INFO_USE_PROTECTION BIT(1)
61
9f985b0e
RR		 62/* mgmt header + 1 byte action code */
63#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
64
65#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 68#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 70
07db2183
RR		 71/* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73#define IEEE80211_MIN_AMPDU_BUF 0x8
74#define IEEE80211_MAX_AMPDU_BUF 0x40
75
f0706e82
JB		 76static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78static struct ieee80211_sta_bss *
8318d78a 79ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 80 u8 *ssid, u8 ssid_len);
3e122be0 81static void ieee80211_rx_bss_put(struct ieee80211_local *local,
f0706e82
JB		 82 struct ieee80211_sta_bss *bss);
83static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85static int ieee80211_sta_wep_configured(struct net_device *dev);
86static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
712590de 90static void sta_rx_agg_session_timer_expired(unsigned long data);
f0706e82
JB		 91
92
ee385855
LCC		 93void ieee802_11_parse_elems(u8 *start, size_t len,
94 struct ieee802_11_elems *elems)
f0706e82
JB		 95{
96 size_t left = len;
97 u8 *pos = start;
f0706e82
JB		 98
99 memset(elems, 0, sizeof(*elems));
100
101 while (left >= 2) {
102 u8 id, elen;
103
104 id = *pos++;
105 elen = *pos++;
106 left -= 2;
107
67a4cce4
JL		 108 if (elen > left)
109 return;
f0706e82
JB		 110
111 switch (id) {
112 case WLAN_EID_SSID:
113 elems->ssid = pos;
114 elems->ssid_len = elen;
115 break;
116 case WLAN_EID_SUPP_RATES:
117 elems->supp_rates = pos;
118 elems->supp_rates_len = elen;
119 break;
120 case WLAN_EID_FH_PARAMS:
121 elems->fh_params = pos;
122 elems->fh_params_len = elen;
123 break;
124 case WLAN_EID_DS_PARAMS:
125 elems->ds_params = pos;
126 elems->ds_params_len = elen;
127 break;
128 case WLAN_EID_CF_PARAMS:
129 elems->cf_params = pos;
130 elems->cf_params_len = elen;
131 break;
132 case WLAN_EID_TIM:
133 elems->tim = pos;
134 elems->tim_len = elen;
135 break;
136 case WLAN_EID_IBSS_PARAMS:
137 elems->ibss_params = pos;
138 elems->ibss_params_len = elen;
139 break;
140 case WLAN_EID_CHALLENGE:
141 elems->challenge = pos;
142 elems->challenge_len = elen;
143 break;
144 case WLAN_EID_WPA:
145 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
146 pos[2] == 0xf2) {
147 /* Microsoft OUI (00:50:F2) */
148 if (pos[3] == 1) {
149 /* OUI Type 1 - WPA IE */
150 elems->wpa = pos;
151 elems->wpa_len = elen;
152 } else if (elen >= 5 && pos[3] == 2) {
153 if (pos[4] == 0) {
154 elems->wmm_info = pos;
155 elems->wmm_info_len = elen;
156 } else if (pos[4] == 1) {
157 elems->wmm_param = pos;
158 elems->wmm_param_len = elen;
159 }
160 }
161 }
162 break;
163 case WLAN_EID_RSN:
164 elems->rsn = pos;
165 elems->rsn_len = elen;
166 break;
167 case WLAN_EID_ERP_INFO:
168 elems->erp_info = pos;
169 elems->erp_info_len = elen;
170 break;
171 case WLAN_EID_EXT_SUPP_RATES:
172 elems->ext_supp_rates = pos;
173 elems->ext_supp_rates_len = elen;
174 break;
c7153508
RR		 175 case WLAN_EID_HT_CAPABILITY:
176 elems->ht_cap_elem = pos;
177 elems->ht_cap_elem_len = elen;
178 break;
179 case WLAN_EID_HT_EXTRA_INFO:
180 elems->ht_info_elem = pos;
181 elems->ht_info_elem_len = elen;
182 break;
ee385855
LCC		 183 case WLAN_EID_MESH_ID:
184 elems->mesh_id = pos;
185 elems->mesh_id_len = elen;
186 break;
187 case WLAN_EID_MESH_CONFIG:
188 elems->mesh_config = pos;
189 elems->mesh_config_len = elen;
190 break;
191 case WLAN_EID_PEER_LINK:
192 elems->peer_link = pos;
193 elems->peer_link_len = elen;
194 break;
195 case WLAN_EID_PREQ:
196 elems->preq = pos;
197 elems->preq_len = elen;
198 break;
199 case WLAN_EID_PREP:
200 elems->prep = pos;
201 elems->prep_len = elen;
202 break;
203 case WLAN_EID_PERR:
204 elems->perr = pos;
205 elems->perr_len = elen;
206 break;
f2df3859
AK		 207 case WLAN_EID_CHANNEL_SWITCH:
208 elems->ch_switch_elem = pos;
209 elems->ch_switch_elem_len = elen;
210 break;
211 case WLAN_EID_QUIET:
212 if (!elems->quiet_elem) {
213 elems->quiet_elem = pos;
214 elems->quiet_elem_len = elen;
215 }
216 elems->num_of_quiet_elem++;
217 break;
218 case WLAN_EID_COUNTRY:
219 elems->country_elem = pos;
220 elems->country_elem_len = elen;
221 break;
222 case WLAN_EID_PWR_CONSTRAINT:
223 elems->pwr_constr_elem = pos;
224 elems->pwr_constr_elem_len = elen;
225 break;
f0706e82 226 default:
f0706e82
JB		 227 break;
228 }
229
230 left -= elen;
231 pos += elen;
232 }
f0706e82
JB		 233}
234
235
f0706e82
JB		 236static int ecw2cw(int ecw)
237{
ac2bf324 238 return (1 << ecw) - 1;
f0706e82
JB		 239}
240
e2839d8f
VK		 241
242static void ieee80211_sta_def_wmm_params(struct net_device *dev,
243 struct ieee80211_sta_bss *bss,
244 int ibss)
245{
246 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
247 struct ieee80211_local *local = sdata->local;
248 int i, have_higher_than_11mbit = 0;
249
250
251 /* cf. IEEE 802.11 9.2.12 */
252 for (i = 0; i < bss->supp_rates_len; i++)
253 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
254 have_higher_than_11mbit = 1;
255
256 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
257 have_higher_than_11mbit)
258 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
259 else
260 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
261
262
263 if (local->ops->conf_tx) {
264 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 265
266 memset(&qparam, 0, sizeof(qparam));
267
268 qparam.aifs = 2;
269
270 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
271 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
272 qparam.cw_min = 31;
273 else
274 qparam.cw_min = 15;
275
276 qparam.cw_max = 1023;
277 qparam.txop = 0;
278
e100bb64
JB		 279 for (i = 0; i < local_to_hw(local)->queues; i++)
280 local->ops->conf_tx(local_to_hw(local), i, &qparam);
e2839d8f
VK		 281 }
282}
283
f0706e82
JB		 284static void ieee80211_sta_wmm_params(struct net_device *dev,
285 struct ieee80211_if_sta *ifsta,
286 u8 *wmm_param, size_t wmm_param_len)
287{
288 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
289 struct ieee80211_tx_queue_params params;
290 size_t left;
291 int count;
292 u8 *pos;
293
3434fbd3
JB		 294 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
295 return;
296
297 if (!wmm_param)
298 return;
299
f0706e82
JB		 300 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
301 return;
302 count = wmm_param[6] & 0x0f;
303 if (count == ifsta->wmm_last_param_set)
304 return;
305 ifsta->wmm_last_param_set = count;
306
307 pos = wmm_param + 8;
308 left = wmm_param_len - 8;
309
310 memset(&params, 0, sizeof(params));
311
312 if (!local->ops->conf_tx)
313 return;
314
315 local->wmm_acm = 0;
316 for (; left >= 4; left -= 4, pos += 4) {
317 int aci = (pos[0] >> 5) & 0x03;
318 int acm = (pos[0] >> 4) & 0x01;
319 int queue;
320
321 switch (aci) {
322 case 1:
e100bb64 323 queue = 3;
988c0f72 324 if (acm)
f0706e82 325 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 326 break;
327 case 2:
e100bb64 328 queue = 1;
988c0f72 329 if (acm)
f0706e82 330 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 331 break;
332 case 3:
e100bb64 333 queue = 0;
988c0f72 334 if (acm)
f0706e82 335 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 336 break;
337 case 0:
338 default:
e100bb64 339 queue = 2;
988c0f72 340 if (acm)
f0706e82 341 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 342 break;
343 }
344
345 params.aifs = pos[0] & 0x0f;
346 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
347 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 348 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 349#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 350 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 351 "cWmin=%d cWmax=%d txop=%d\n",
f0706e82 352 dev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 353 params.cw_max, params.txop);
354#endif
f0706e82
JB		 355 /* TODO: handle ACM (block TX, fallback to next lowest allowed
356 * AC for now) */
357 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
358 printk(KERN_DEBUG "%s: failed to set TX queue "
359 "parameters for queue %d\n", dev->name, queue);
360 }
361 }
362}
363
50c4afb9
JL		 364static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
365 bool use_protection,
366 bool use_short_preamble)
5628221c 367{
471b3efd 368 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 369#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 370 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 371 DECLARE_MAC_BUF(mac);
ebd74487 372#endif
471b3efd 373 u32 changed = 0;
5628221c 374
471b3efd 375 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 376#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 377 if (net_ratelimit()) {
378 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 379 "%s)\n",
471b3efd 380 sdata->dev->name,
5628221c 381 use_protection ? "enabled" : "disabled",
0795af57 382 print_mac(mac, ifsta->bssid));
5628221c 383 }
f4ea83dd 384#endif
471b3efd
JB		 385 bss_conf->use_cts_prot = use_protection;
386 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 387 }
7e9ed188 388
d43c7b37 389 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 390#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 391 if (net_ratelimit()) {
392 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 393 " (BSSID=%s)\n",
471b3efd 394 sdata->dev->name,
d43c7b37 395 use_short_preamble ? "short" : "long",
0795af57 396 print_mac(mac, ifsta->bssid));
7e9ed188 397 }
f4ea83dd 398#endif
d43c7b37 399 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 400 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 401 }
d9430a32 402
471b3efd 403 return changed;
5628221c
DD		 404}
405
50c4afb9
JL		 406static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
407 u8 erp_value)
408{
409 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
410 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
411
412 return ieee80211_handle_protect_preamb(sdata,
413 use_protection, use_short_preamble);
414}
415
416static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
417 struct ieee80211_sta_bss *bss)
418{
419 u32 changed = 0;
420
421 if (bss->has_erp_value)
422 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
423 else {
424 u16 capab = bss->capability;
425 changed |= ieee80211_handle_protect_preamb(sdata, false,
426 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
427 }
428
429 return changed;
430}
431
c7153508
RR		 432int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
433 struct ieee80211_ht_info *ht_info)
434{
435
436 if (ht_info == NULL)
437 return -EINVAL;
438
439 memset(ht_info, 0, sizeof(*ht_info));
440
441 if (ht_cap_ie) {
442 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
443
444 ht_info->ht_supported = 1;
445 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
446 ht_info->ampdu_factor =
447 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
448 ht_info->ampdu_density =
449 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
450 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
451 } else
452 ht_info->ht_supported = 0;
453
454 return 0;
455}
456
457int ieee80211_ht_addt_info_ie_to_ht_bss_info(
458 struct ieee80211_ht_addt_info *ht_add_info_ie,
459 struct ieee80211_ht_bss_info *bss_info)
460{
461 if (bss_info == NULL)
462 return -EINVAL;
463
464 memset(bss_info, 0, sizeof(*bss_info));
465
466 if (ht_add_info_ie) {
467 u16 op_mode;
468 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
469
470 bss_info->primary_channel = ht_add_info_ie->control_chan;
471 bss_info->bss_cap = ht_add_info_ie->ht_param;
472 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
473 }
474
475 return 0;
476}
5628221c 477
f0706e82
JB		 478static void ieee80211_sta_send_associnfo(struct net_device *dev,
479 struct ieee80211_if_sta *ifsta)
480{
481 char *buf;
482 size_t len;
483 int i;
484 union iwreq_data wrqu;
485
486 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
487 return;
488
489 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 490 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 491 if (!buf)
492 return;
493
494 len = sprintf(buf, "ASSOCINFO(");
495 if (ifsta->assocreq_ies) {
496 len += sprintf(buf + len, "ReqIEs=");
497 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
498 len += sprintf(buf + len, "%02x",
499 ifsta->assocreq_ies[i]);
500 }
501 }
502 if (ifsta->assocresp_ies) {
503 if (ifsta->assocreq_ies)
504 len += sprintf(buf + len, " ");
505 len += sprintf(buf + len, "RespIEs=");
506 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
507 len += sprintf(buf + len, "%02x",
508 ifsta->assocresp_ies[i]);
509 }
510 }
511 len += sprintf(buf + len, ")");
512
513 if (len > IW_CUSTOM_MAX) {
514 len = sprintf(buf, "ASSOCRESPIE=");
515 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
516 len += sprintf(buf + len, "%02x",
517 ifsta->assocresp_ies[i]);
518 }
519 }
520
521 memset(&wrqu, 0, sizeof(wrqu));
522 wrqu.data.length = len;
523 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
524
525 kfree(buf);
526}
527
528
529static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 530 struct ieee80211_if_sta *ifsta,
47f0c502 531 bool assoc)
f0706e82 532{
471b3efd
JB		 533 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
534 struct ieee80211_local *local = sdata->local;
38668c05 535 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 536 union iwreq_data wrqu;
471b3efd 537 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 538
f0706e82 539 if (assoc) {
5628221c 540 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 541
542 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
543
51fb61e7 544 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 545 return;
5628221c 546
65c107ab 547 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
38668c05 548 conf->channel->center_freq,
cffdd30d 549 ifsta->ssid, ifsta->ssid_len);
5628221c 550 if (bss) {
21c0cbe7
TW		 551 /* set timing information */
552 sdata->bss_conf.beacon_int = bss->beacon_int;
553 sdata->bss_conf.timestamp = bss->timestamp;
98f7dfd8 554 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 555
50c4afb9 556 changed |= ieee80211_handle_bss_capability(sdata, bss);
21c0cbe7 557
3e122be0 558 ieee80211_rx_bss_put(local, bss);
5628221c
DD		 559 }
560
38668c05
TW		 561 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
562 changed |= BSS_CHANGED_HT;
563 sdata->bss_conf.assoc_ht = 1;
564 sdata->bss_conf.ht_conf = &conf->ht_conf;
565 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
566 }
567
d6f2da5b 568 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 569 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
570 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
571 ieee80211_sta_send_associnfo(dev, ifsta);
572 } else {
8db9369f 573 netif_carrier_off(dev);
85249e5f 574 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
d6f2da5b 575 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
fc32f924 576 changed |= ieee80211_reset_erp_info(dev);
38668c05
TW		 577
578 sdata->bss_conf.assoc_ht = 0;
579 sdata->bss_conf.ht_conf = NULL;
580 sdata->bss_conf.ht_bss_conf = NULL;
581
f0706e82
JB		 582 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
583 }
f0706e82 584 ifsta->last_probe = jiffies;
47f0c502 585 ieee80211_led_assoc(local, assoc);
471b3efd 586
b2205256 587 sdata->bss_conf.assoc = assoc;
471b3efd 588 ieee80211_bss_info_change_notify(sdata, changed);
8db9369f
GC		 589
590 if (assoc)
591 netif_carrier_on(dev);
592
41a7be48
RC		 593 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
594 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
f0706e82
JB		 595}
596
597static void ieee80211_set_disassoc(struct net_device *dev,
598 struct ieee80211_if_sta *ifsta, int deauth)
599{
600 if (deauth)
601 ifsta->auth_tries = 0;
602 ifsta->assoc_tries = 0;
603 ieee80211_set_associated(dev, ifsta, 0);
604}
605
ee385855
LCC		 606void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
607 int encrypt)
f0706e82
JB		 608{
609 struct ieee80211_sub_if_data *sdata;
f0706e82
JB		 610
611 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
612 skb->dev = sdata->local->mdev;
613 skb_set_mac_header(skb, 0);
614 skb_set_network_header(skb, 0);
615 skb_set_transport_header(skb, 0);
616
d0f09804
JB		 617 skb->iif = sdata->dev->ifindex;
618 skb->do_not_encrypt = !encrypt;
f0706e82
JB		 619
620 dev_queue_xmit(skb);
621}
622
623
624static void ieee80211_send_auth(struct net_device *dev,
625 struct ieee80211_if_sta *ifsta,
626 int transaction, u8 *extra, size_t extra_len,
627 int encrypt)
628{
629 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
630 struct sk_buff *skb;
631 struct ieee80211_mgmt *mgmt;
632
633 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
634 sizeof(*mgmt) + 6 + extra_len);
635 if (!skb) {
636 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
637 "frame\n", dev->name);
638 return;
639 }
640 skb_reserve(skb, local->hw.extra_tx_headroom);
641
642 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
643 memset(mgmt, 0, 24 + 6);
644 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
645 IEEE80211_STYPE_AUTH);
646 if (encrypt)
647 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
648 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
649 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
650 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
651 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
652 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
653 ifsta->auth_transaction = transaction + 1;
654 mgmt->u.auth.status_code = cpu_to_le16(0);
655 if (extra)
656 memcpy(skb_put(skb, extra_len), extra, extra_len);
657
658 ieee80211_sta_tx(dev, skb, encrypt);
659}
660
661
662static void ieee80211_authenticate(struct net_device *dev,
663 struct ieee80211_if_sta *ifsta)
664{
0795af57
JP		 665 DECLARE_MAC_BUF(mac);
666
f0706e82
JB		 667 ifsta->auth_tries++;
668 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 669 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 670 " timed out\n",
0795af57 671 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 672 ifsta->state = IEEE80211_DISABLED;
673 return;
674 }
675
676 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 677 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
678 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 679
680 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
681
682 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
683}
684
36d16ae7
HS		 685static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
686 struct ieee80211_supported_band *sband,
687 u64 *rates)
688{
689 int i, j, count;
690 *rates = 0;
691 count = 0;
692 for (i = 0; i < bss->supp_rates_len; i++) {
693 int rate = (bss->supp_rates[i] & 0x7F) * 5;
694
695 for (j = 0; j < sband->n_bitrates; j++)
696 if (sband->bitrates[j].bitrate == rate) {
697 *rates |= BIT(j);
698 count++;
699 break;
700 }
701 }
702
703 return count;
704}
f0706e82
JB		 705
706static void ieee80211_send_assoc(struct net_device *dev,
707 struct ieee80211_if_sta *ifsta)
708{
709 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 710 struct sk_buff *skb;
711 struct ieee80211_mgmt *mgmt;
712 u8 *pos, *ies;
36d16ae7 713 int i, len, count, rates_len, supp_rates_len;
f0706e82
JB		 714 u16 capab;
715 struct ieee80211_sta_bss *bss;
716 int wmm = 0;
8318d78a 717 struct ieee80211_supported_band *sband;
36d16ae7 718 u64 rates = 0;
f0706e82
JB		 719
720 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
721 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
722 ifsta->ssid_len);
723 if (!skb) {
724 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
725 "frame\n", dev->name);
726 return;
727 }
728 skb_reserve(skb, local->hw.extra_tx_headroom);
729
8318d78a
JB		 730 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
731
f0706e82 732 capab = ifsta->capab;
8318d78a
JB		 733
734 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
735 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
736 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
737 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
738 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 739 }
8318d78a
JB		 740
741 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
742 local->hw.conf.channel->center_freq,
cffdd30d 743 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 744 if (bss) {
745 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
746 capab |= WLAN_CAPABILITY_PRIVACY;
988c0f72 747 if (bss->wmm_ie)
f0706e82 748 wmm = 1;
0d580a77
HS		 749
750 /* get all rates supported by the device and the AP as
751 * some APs don't like getting a superset of their rates
752 * in the association request (e.g. D-Link DAP 1353 in
753 * b-only mode) */
754 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
755
06ff47bc
TW		 756 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
757 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
758 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
759
3e122be0 760 ieee80211_rx_bss_put(local, bss);
0d580a77
HS		 761 } else {
762 rates = ~0;
763 rates_len = sband->n_bitrates;
f0706e82
JB		 764 }
765
766 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
767 memset(mgmt, 0, 24);
768 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
769 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
770 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
771
d6f2da5b 772 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 773 skb_put(skb, 10);
774 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
775 IEEE80211_STYPE_REASSOC_REQ);
776 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 777 mgmt->u.reassoc_req.listen_interval =
778 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 779 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
780 ETH_ALEN);
781 } else {
782 skb_put(skb, 4);
783 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
784 IEEE80211_STYPE_ASSOC_REQ);
785 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 786 mgmt->u.reassoc_req.listen_interval =
787 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 788 }
789
790 /* SSID */
791 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
792 *pos++ = WLAN_EID_SSID;
793 *pos++ = ifsta->ssid_len;
794 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
795
0d580a77 796 /* add all rates which were marked to be used above */
36d16ae7
HS		 797 supp_rates_len = rates_len;
798 if (supp_rates_len > 8)
799 supp_rates_len = 8;
800
8318d78a 801 len = sband->n_bitrates;
36d16ae7 802 pos = skb_put(skb, supp_rates_len + 2);
f0706e82 803 *pos++ = WLAN_EID_SUPP_RATES;
36d16ae7 804 *pos++ = supp_rates_len;
f0706e82 805
36d16ae7
HS		 806 count = 0;
807 for (i = 0; i < sband->n_bitrates; i++) {
808 if (BIT(i) & rates) {
8318d78a 809 int rate = sband->bitrates[i].bitrate;
f0706e82 810 *pos++ = (u8) (rate / 5);
36d16ae7
HS		 811 if (++count == 8)
812 break;
813 }
814 }
815
816 if (count == 8) {
817 pos = skb_put(skb, rates_len - count + 2);
818 *pos++ = WLAN_EID_EXT_SUPP_RATES;
819 *pos++ = rates_len - count;
820
821 for (i++; i < sband->n_bitrates; i++) {
822 if (BIT(i) & rates) {
823 int rate = sband->bitrates[i].bitrate;
824 *pos++ = (u8) (rate / 5);
825 }
f0706e82
JB		 826 }
827 }
828
06ff47bc
TW		 829 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
830 /* 1. power capabilities */
831 pos = skb_put(skb, 4);
832 *pos++ = WLAN_EID_PWR_CAPABILITY;
833 *pos++ = 2;
834 *pos++ = 0; /* min tx power */
835 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
836
837 /* 2. supported channels */
838 /* TODO: get this in reg domain format */
839 pos = skb_put(skb, 2 * sband->n_channels + 2);
840 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
841 *pos++ = 2 * sband->n_channels;
842 for (i = 0; i < sband->n_channels; i++) {
843 *pos++ = ieee80211_frequency_to_channel(
844 sband->channels[i].center_freq);
845 *pos++ = 1; /* one channel in the subband*/
846 }
847 }
848
f0706e82
JB		 849 if (ifsta->extra_ie) {
850 pos = skb_put(skb, ifsta->extra_ie_len);
851 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
852 }
853
d6f2da5b 854 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 855 pos = skb_put(skb, 9);
856 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
857 *pos++ = 7; /* len */
858 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
859 *pos++ = 0x50;
860 *pos++ = 0xf2;
861 *pos++ = 2; /* WME */
862 *pos++ = 0; /* WME info */
863 *pos++ = 1; /* WME ver */
864 *pos++ = 0;
865 }
3434fbd3 866
c7153508 867 /* wmm support is a must to HT */
3434fbd3 868 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
9306102e
EG		 869 sband->ht_info.ht_supported && bss->ht_add_ie) {
870 struct ieee80211_ht_addt_info *ht_add_info =
871 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
872 u16 cap = sband->ht_info.cap;
873 __le16 tmp;
874 u32 flags = local->hw.conf.channel->flags;
875
876 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
877 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
878 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
879 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
880 cap &= ~IEEE80211_HT_CAP_SGI_40;
881 }
882 break;
883 case IEEE80211_HT_IE_CHA_SEC_BELOW:
884 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
885 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
886 cap &= ~IEEE80211_HT_CAP_SGI_40;
887 }
888 break;
889 }
890
891 tmp = cpu_to_le16(cap);
c7153508
RR		 892 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
893 *pos++ = WLAN_EID_HT_CAPABILITY;
894 *pos++ = sizeof(struct ieee80211_ht_cap);
895 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
896 memcpy(pos, &tmp, sizeof(u16));
897 pos += sizeof(u16);
8318d78a
JB		 898 /* TODO: needs a define here for << 2 */
899 *pos++ = sband->ht_info.ampdu_factor |
900 (sband->ht_info.ampdu_density << 2);
901 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 902 }
f0706e82
JB		 903
904 kfree(ifsta->assocreq_ies);
905 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 906 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 907 if (ifsta->assocreq_ies)
908 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
909
910 ieee80211_sta_tx(dev, skb, 0);
911}
912
913
914static void ieee80211_send_deauth(struct net_device *dev,
915 struct ieee80211_if_sta *ifsta, u16 reason)
916{
917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
918 struct sk_buff *skb;
919 struct ieee80211_mgmt *mgmt;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
922 if (!skb) {
923 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
924 "frame\n", dev->name);
925 return;
926 }
927 skb_reserve(skb, local->hw.extra_tx_headroom);
928
929 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
930 memset(mgmt, 0, 24);
931 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
932 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
933 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
934 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
935 IEEE80211_STYPE_DEAUTH);
936 skb_put(skb, 2);
937 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
938
939 ieee80211_sta_tx(dev, skb, 0);
940}
941
942
943static void ieee80211_send_disassoc(struct net_device *dev,
944 struct ieee80211_if_sta *ifsta, u16 reason)
945{
946 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
947 struct sk_buff *skb;
948 struct ieee80211_mgmt *mgmt;
949
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
951 if (!skb) {
952 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
953 "frame\n", dev->name);
954 return;
955 }
956 skb_reserve(skb, local->hw.extra_tx_headroom);
957
958 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
959 memset(mgmt, 0, 24);
960 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
961 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
962 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
963 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
964 IEEE80211_STYPE_DISASSOC);
965 skb_put(skb, 2);
966 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
967
968 ieee80211_sta_tx(dev, skb, 0);
969}
970
971
972static int ieee80211_privacy_mismatch(struct net_device *dev,
973 struct ieee80211_if_sta *ifsta)
974{
65c107ab 975 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 976 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 977 int bss_privacy;
978 int wep_privacy;
979 int privacy_invoked;
f0706e82 980
5b98b1f7 981 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 982 return 0;
983
8318d78a
JB		 984 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
985 local->hw.conf.channel->center_freq,
cffdd30d 986 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 987 if (!bss)
988 return 0;
989
5b98b1f7
JB		 990 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
991 wep_privacy = !!ieee80211_sta_wep_configured(dev);
992 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 993
3e122be0 994 ieee80211_rx_bss_put(local, bss);
f0706e82 995
5b98b1f7
JB		 996 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
997 return 0;
998
999 return 1;
f0706e82
JB		 1000}
1001
1002
1003static void ieee80211_associate(struct net_device *dev,
1004 struct ieee80211_if_sta *ifsta)
1005{
0795af57
JP		 1006 DECLARE_MAC_BUF(mac);
1007
f0706e82
JB		 1008 ifsta->assoc_tries++;
1009 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 1010 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 1011 " timed out\n",
0795af57 1012 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 1013 ifsta->state = IEEE80211_DISABLED;
1014 return;
1015 }
1016
1017 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 1018 printk(KERN_DEBUG "%s: associate with AP %s\n",
1019 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 1020 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1021 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1022 "mixed-cell disabled - abort association\n", dev->name);
1023 ifsta->state = IEEE80211_DISABLED;
1024 return;
1025 }
1026
1027 ieee80211_send_assoc(dev, ifsta);
1028
1029 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1030}
1031
1032
1033static void ieee80211_associated(struct net_device *dev,
1034 struct ieee80211_if_sta *ifsta)
1035{
1036 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1037 struct sta_info *sta;
1038 int disassoc;
0795af57 1039 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1040
1041 /* TODO: start monitoring current AP signal quality and number of
1042 * missed beacons. Scan other channels every now and then and search
1043 * for better APs. */
1044 /* TODO: remove expired BSSes */
1045
1046 ifsta->state = IEEE80211_ASSOCIATED;
1047
d0709a65
JB		 1048 rcu_read_lock();
1049
f0706e82
JB		 1050 sta = sta_info_get(local, ifsta->bssid);
1051 if (!sta) {
0795af57
JP		 1052 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1053 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 1054 disassoc = 1;
1055 } else {
1056 disassoc = 0;
1057 if (time_after(jiffies,
1058 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1059 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1060 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 1061 "current AP %s - assume out of "
f0706e82 1062 "range\n",
0795af57 1063 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 1064 disassoc = 1;
d0709a65 1065 sta_info_unlink(&sta);
d6f2da5b 1066 } else
f0706e82
JB		 1067 ieee80211_send_probe_req(dev, ifsta->bssid,
1068 local->scan_ssid,
1069 local->scan_ssid_len);
d6f2da5b 1070 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1071 } else {
d6f2da5b 1072 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1073 if (time_after(jiffies, ifsta->last_probe +
1074 IEEE80211_PROBE_INTERVAL)) {
1075 ifsta->last_probe = jiffies;
1076 ieee80211_send_probe_req(dev, ifsta->bssid,
1077 ifsta->ssid,
1078 ifsta->ssid_len);
1079 }
1080 }
f0706e82 1081 }
d0709a65
JB		 1082
1083 rcu_read_unlock();
1084
3b96766f 1085 if (disassoc && sta)
d0709a65 1086 sta_info_destroy(sta);
d0709a65 1087
f0706e82 1088 if (disassoc) {
2d192d95
MW		 1089 ifsta->state = IEEE80211_DISABLED;
1090 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 1091 } else {
1092 mod_timer(&ifsta->timer, jiffies +
1093 IEEE80211_MONITORING_INTERVAL);
1094 }
1095}
1096
1097
1098static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1099 u8 *ssid, size_t ssid_len)
1100{
1101 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 1102 struct ieee80211_supported_band *sband;
f0706e82
JB		 1103 struct sk_buff *skb;
1104 struct ieee80211_mgmt *mgmt;
1105 u8 *pos, *supp_rates, *esupp_rates = NULL;
1106 int i;
1107
1108 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1109 if (!skb) {
1110 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1111 "request\n", dev->name);
1112 return;
1113 }
1114 skb_reserve(skb, local->hw.extra_tx_headroom);
1115
1116 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1117 memset(mgmt, 0, 24);
1118 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1119 IEEE80211_STYPE_PROBE_REQ);
1120 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1121 if (dst) {
1122 memcpy(mgmt->da, dst, ETH_ALEN);
1123 memcpy(mgmt->bssid, dst, ETH_ALEN);
1124 } else {
1125 memset(mgmt->da, 0xff, ETH_ALEN);
1126 memset(mgmt->bssid, 0xff, ETH_ALEN);
1127 }
1128 pos = skb_put(skb, 2 + ssid_len);
1129 *pos++ = WLAN_EID_SSID;
1130 *pos++ = ssid_len;
1131 memcpy(pos, ssid, ssid_len);
1132
1133 supp_rates = skb_put(skb, 2);
1134 supp_rates[0] = WLAN_EID_SUPP_RATES;
1135 supp_rates[1] = 0;
8318d78a
JB		 1136 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1137
1138 for (i = 0; i < sband->n_bitrates; i++) {
1139 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 1140 if (esupp_rates) {
1141 pos = skb_put(skb, 1);
1142 esupp_rates[1]++;
1143 } else if (supp_rates[1] == 8) {
1144 esupp_rates = skb_put(skb, 3);
1145 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1146 esupp_rates[1] = 1;
1147 pos = &esupp_rates[2];
1148 } else {
1149 pos = skb_put(skb, 1);
1150 supp_rates[1]++;
1151 }
8318d78a 1152 *pos = rate->bitrate / 5;
f0706e82
JB		 1153 }
1154
1155 ieee80211_sta_tx(dev, skb, 0);
1156}
1157
1158
1159static int ieee80211_sta_wep_configured(struct net_device *dev)
1160{
1161 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1162 if (!sdata || !sdata->default_key ||
8f20fc24 1163 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 1164 return 0;
1165 return 1;
1166}
1167
1168
1169static void ieee80211_auth_completed(struct net_device *dev,
1170 struct ieee80211_if_sta *ifsta)
1171{
1172 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 1173 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1174 ieee80211_associate(dev, ifsta);
1175}
1176
1177
1178static void ieee80211_auth_challenge(struct net_device *dev,
1179 struct ieee80211_if_sta *ifsta,
1180 struct ieee80211_mgmt *mgmt,
1181 size_t len)
1182{
1183 u8 *pos;
1184 struct ieee802_11_elems elems;
1185
f0706e82 1186 pos = mgmt->u.auth.variable;
67a4cce4 1187 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1188 if (!elems.challenge)
f0706e82 1189 return;
f0706e82
JB		 1190 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1191 elems.challenge_len + 2, 1);
1192}
1193
9f985b0e
RR		 1194static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1195 u8 dialog_token, u16 status, u16 policy,
1196 u16 buf_size, u16 timeout)
1197{
1198 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1199 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1200 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1201 struct sk_buff *skb;
1202 struct ieee80211_mgmt *mgmt;
1203 u16 capab;
1204
3acea5b6
EK		 1205 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1206
9f985b0e
RR		 1207 if (!skb) {
1208 printk(KERN_DEBUG "%s: failed to allocate buffer "
1209 "for addba resp frame\n", dev->name);
1210 return;
1211 }
1212
1213 skb_reserve(skb, local->hw.extra_tx_headroom);
1214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1215 memset(mgmt, 0, 24);
1216 memcpy(mgmt->da, da, ETH_ALEN);
1217 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1218 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1219 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1220 else
1221 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1222 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1223 IEEE80211_STYPE_ACTION);
1224
1225 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1226 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1227 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1228 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1229
1230 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1231 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1232 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1233
1234 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1235 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1236 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1237
1238 ieee80211_sta_tx(dev, skb, 0);
1239
1240 return;
1241}
1242
eadc8d9e
RR		 1243void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1244 u16 tid, u8 dialog_token, u16 start_seq_num,
1245 u16 agg_size, u16 timeout)
1246{
1247 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1248 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1249 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1250 struct sk_buff *skb;
1251 struct ieee80211_mgmt *mgmt;
1252 u16 capab;
1253
3acea5b6 1254 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
eadc8d9e
RR		 1255
1256 if (!skb) {
1257 printk(KERN_ERR "%s: failed to allocate buffer "
1258 "for addba request frame\n", dev->name);
1259 return;
1260 }
1261 skb_reserve(skb, local->hw.extra_tx_headroom);
1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1263 memset(mgmt, 0, 24);
1264 memcpy(mgmt->da, da, ETH_ALEN);
1265 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1266 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1267 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1268 else
1269 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1270
1271 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1272 IEEE80211_STYPE_ACTION);
1273
1274 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1275
1276 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1277 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1278
1279 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1280 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1281 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1282 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1283
1284 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1285
1286 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1287 mgmt->u.action.u.addba_req.start_seq_num =
1288 cpu_to_le16(start_seq_num << 4);
1289
1290 ieee80211_sta_tx(dev, skb, 0);
1291}
1292
9f985b0e
RR		 1293static void ieee80211_sta_process_addba_request(struct net_device *dev,
1294 struct ieee80211_mgmt *mgmt,
1295 size_t len)
1296{
1297 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1298 struct ieee80211_hw *hw = &local->hw;
1299 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1300 struct sta_info *sta;
07db2183
RR		 1301 struct tid_ampdu_rx *tid_agg_rx;
1302 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1303 u8 dialog_token;
07db2183
RR		 1304 int ret = -EOPNOTSUPP;
1305 DECLARE_MAC_BUF(mac);
9f985b0e 1306
d0709a65
JB		 1307 rcu_read_lock();
1308
9f985b0e 1309 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1310 if (!sta) {
1311 rcu_read_unlock();
9f985b0e 1312 return;
d0709a65 1313 }
9f985b0e
RR		 1314
1315 /* extract session parameters from addba request frame */
1316 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1317 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1318 start_seq_num =
1319 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1320
1321 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1322 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1323 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1324 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1325
9f985b0e
RR		 1326 status = WLAN_STATUS_REQUEST_DECLINED;
1327
07db2183
RR		 1328 /* sanity check for incoming parameters:
1329 * check if configuration can support the BA policy
1330 * and if buffer size does not exceeds max value */
1331 if (((ba_policy != 1)
1332 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1333 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1334 status = WLAN_STATUS_INVALID_QOS_PARAM;
1335#ifdef CONFIG_MAC80211_HT_DEBUG
1336 if (net_ratelimit())
7b9d44cd 1337 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1338 "%s on tid %u. policy %d, buffer size %d\n",
1339 print_mac(mac, mgmt->sa), tid, ba_policy,
1340 buf_size);
1341#endif /* CONFIG_MAC80211_HT_DEBUG */
1342 goto end_no_lock;
1343 }
1344 /* determine default buffer size */
1345 if (buf_size == 0) {
8318d78a
JB		 1346 struct ieee80211_supported_band *sband;
1347
1348 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1349 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1350 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1351 }
1352
07db2183
RR		 1353
1354 /* examine state machine */
07346f81 1355 spin_lock_bh(&sta->lock);
07db2183 1356
cee24a3e 1357 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1358#ifdef CONFIG_MAC80211_HT_DEBUG
1359 if (net_ratelimit())
7b9d44cd 1360 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1361 "%s on tid %u\n",
1362 print_mac(mac, mgmt->sa), tid);
1363#endif /* CONFIG_MAC80211_HT_DEBUG */
1364 goto end;
1365 }
1366
cee24a3e
RR		 1367 /* prepare A-MPDU MLME for Rx aggregation */
1368 sta->ampdu_mlme.tid_rx[tid] =
1369 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1370 if (!sta->ampdu_mlme.tid_rx[tid]) {
f4ea83dd 1371#ifdef CONFIG_MAC80211_HT_DEBUG
cee24a3e
RR		 1372 if (net_ratelimit())
1373 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1374 tid);
f4ea83dd 1375#endif
cee24a3e
RR		 1376 goto end;
1377 }
1378 /* rx timer */
1379 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1380 sta_rx_agg_session_timer_expired;
1381 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1382 (unsigned long)&sta->timer_to_tid[tid];
1383 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1384
1385 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1386
07db2183
RR		 1387 /* prepare reordering buffer */
1388 tid_agg_rx->reorder_buf =
c97c23e3 1389 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
03147dfc 1390 if (!tid_agg_rx->reorder_buf) {
f4ea83dd 1391#ifdef CONFIG_MAC80211_HT_DEBUG
03147dfc
JB		 1392 if (net_ratelimit())
1393 printk(KERN_ERR "can not allocate reordering buffer "
1394 "to tid %d\n", tid);
f4ea83dd 1395#endif
cee24a3e 1396 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1397 goto end;
1398 }
1399 memset(tid_agg_rx->reorder_buf, 0,
c97c23e3 1400 buf_size * sizeof(struct sk_buff *));
07db2183
RR		 1401
1402 if (local->ops->ampdu_action)
1403 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1404 sta->addr, tid, &start_seq_num);
07db2183 1405#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1406 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1407#endif /* CONFIG_MAC80211_HT_DEBUG */
1408
1409 if (ret) {
1410 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1411 kfree(tid_agg_rx);
1412 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1413 goto end;
1414 }
1415
1416 /* change state and send addba resp */
cee24a3e 1417 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1418 tid_agg_rx->dialog_token = dialog_token;
1419 tid_agg_rx->ssn = start_seq_num;
1420 tid_agg_rx->head_seq_num = start_seq_num;
1421 tid_agg_rx->buf_size = buf_size;
1422 tid_agg_rx->timeout = timeout;
1423 tid_agg_rx->stored_mpdu_num = 0;
1424 status = WLAN_STATUS_SUCCESS;
1425end:
07346f81 1426 spin_unlock_bh(&sta->lock);
07db2183
RR		 1427
1428end_no_lock:
d0709a65
JB		 1429 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1430 dialog_token, status, 1, buf_size, timeout);
1431 rcu_read_unlock();
9f985b0e 1432}
f0706e82 1433
eadc8d9e
RR		 1434static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1435 struct ieee80211_mgmt *mgmt,
1436 size_t len)
1437{
1438 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1439 struct ieee80211_hw *hw = &local->hw;
1440 struct sta_info *sta;
1441 u16 capab;
1442 u16 tid;
1443 u8 *state;
1444
d0709a65
JB		 1445 rcu_read_lock();
1446
eadc8d9e 1447 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1448 if (!sta) {
1449 rcu_read_unlock();
eadc8d9e 1450 return;
d0709a65 1451 }
eadc8d9e
RR		 1452
1453 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1454 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1455
cee24a3e 1456 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1457
07346f81 1458 spin_lock_bh(&sta->lock);
eadc8d9e 1459
cee24a3e 1460 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1461 spin_unlock_bh(&sta->lock);
cee24a3e
RR		 1462 goto addba_resp_exit;
1463 }
1464
eadc8d9e 1465 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1466 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
07346f81 1467 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1468#ifdef CONFIG_MAC80211_HT_DEBUG
1469 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1470#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1471 goto addba_resp_exit;
eadc8d9e
RR		 1472 }
1473
cee24a3e 1474 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1475#ifdef CONFIG_MAC80211_HT_DEBUG
1476 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1477#endif /* CONFIG_MAC80211_HT_DEBUG */
1478 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1479 == WLAN_STATUS_SUCCESS) {
eadc8d9e 1480 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1481 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e 1482
f4ea83dd 1483 if (*state == HT_AGG_STATE_OPERATIONAL)
eadc8d9e 1484 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
eadc8d9e 1485
07346f81 1486 spin_unlock_bh(&sta->lock);
eadc8d9e 1487 } else {
cee24a3e 1488 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1489 /* this will allow the state check in stop_BA_session */
1490 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1491 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1492 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1493 WLAN_BACK_INITIATOR);
1494 }
cee24a3e
RR		 1495
1496addba_resp_exit:
d0709a65 1497 rcu_read_unlock();
eadc8d9e
RR		 1498}
1499
1500void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1501 u16 initiator, u16 reason_code)
07db2183
RR		 1502{
1503 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1504 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1505 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1506 struct sk_buff *skb;
1507 struct ieee80211_mgmt *mgmt;
1508 u16 params;
1509
3acea5b6 1510 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
07db2183
RR		 1511
1512 if (!skb) {
1513 printk(KERN_ERR "%s: failed to allocate buffer "
1514 "for delba frame\n", dev->name);
1515 return;
1516 }
1517
1518 skb_reserve(skb, local->hw.extra_tx_headroom);
1519 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1520 memset(mgmt, 0, 24);
1521 memcpy(mgmt->da, da, ETH_ALEN);
1522 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1523 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1524 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1525 else
1526 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1527 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1528 IEEE80211_STYPE_ACTION);
1529
1530 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1531
1532 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1533 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1534 params = (u16)(initiator << 11); /* bit 11 initiator */
1535 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1536
1537 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1538 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1539
1540 ieee80211_sta_tx(dev, skb, 0);
1541}
1542
429a3805
RR		 1543void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn)
1544{
1545 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1546 struct sk_buff *skb;
1547 struct ieee80211_bar *bar;
1548 u16 bar_control = 0;
1549
1550 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1551 if (!skb) {
1552 printk(KERN_ERR "%s: failed to allocate buffer for "
1553 "bar frame\n", dev->name);
1554 return;
1555 }
1556 skb_reserve(skb, local->hw.extra_tx_headroom);
1557 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1558 memset(bar, 0, sizeof(*bar));
1559 bar->frame_control = IEEE80211_FC(IEEE80211_FTYPE_CTL,
1560 IEEE80211_STYPE_BACK_REQ);
1561 memcpy(bar->ra, ra, ETH_ALEN);
1562 memcpy(bar->ta, dev->dev_addr, ETH_ALEN);
1563 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1564 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1565 bar_control |= (u16)(tid << 12);
1566 bar->control = cpu_to_le16(bar_control);
1567 bar->start_seq_num = cpu_to_le16(ssn);
1568
1569 ieee80211_sta_tx(dev, skb, 0);
1570}
1571
07db2183
RR		 1572void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1573 u16 initiator, u16 reason)
1574{
1575 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1576 struct ieee80211_hw *hw = &local->hw;
1577 struct sta_info *sta;
b580781e 1578 int ret, i;
513a1025 1579 DECLARE_MAC_BUF(mac);
07db2183 1580
d0709a65
JB		 1581 rcu_read_lock();
1582
07db2183 1583 sta = sta_info_get(local, ra);
d0709a65
JB		 1584 if (!sta) {
1585 rcu_read_unlock();
07db2183 1586 return;
d0709a65 1587 }
07db2183
RR		 1588
1589 /* check if TID is in operational state */
07346f81 1590 spin_lock_bh(&sta->lock);
cee24a3e 1591 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183 1592 != HT_AGG_STATE_OPERATIONAL) {
07346f81 1593 spin_unlock_bh(&sta->lock);
d0709a65 1594 rcu_read_unlock();
07db2183
RR		 1595 return;
1596 }
cee24a3e 1597 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1598 HT_AGG_STATE_REQ_STOP_BA_MSK |
1599 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
07346f81 1600 spin_unlock_bh(&sta->lock);
07db2183
RR		 1601
1602 /* stop HW Rx aggregation. ampdu_action existence
1603 * already verified in session init so we add the BUG_ON */
1604 BUG_ON(!local->ops->ampdu_action);
1605
513a1025
RR		 1606#ifdef CONFIG_MAC80211_HT_DEBUG
1607 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1608 print_mac(mac, ra), tid);
1609#endif /* CONFIG_MAC80211_HT_DEBUG */
1610
07db2183 1611 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1612 ra, tid, NULL);
07db2183
RR		 1613 if (ret)
1614 printk(KERN_DEBUG "HW problem - can not stop rx "
f4ea83dd 1615 "aggregation for tid %d\n", tid);
07db2183
RR		 1616
1617 /* shutdown timer has not expired */
1618 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1619 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1620
1621 /* check if this is a self generated aggregation halt */
1622 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1623 ieee80211_send_delba(dev, ra, tid, 0, reason);
1624
1625 /* free the reordering buffer */
cee24a3e
RR		 1626 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1627 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1628 /* release the reordered frames */
cee24a3e
RR		 1629 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1630 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1631 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1632 }
1633 }
cee24a3e
RR		 1634 /* free resources */
1635 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1636 kfree(sta->ampdu_mlme.tid_rx[tid]);
1637 sta->ampdu_mlme.tid_rx[tid] = NULL;
1638 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1639
d0709a65 1640 rcu_read_unlock();
07db2183
RR		 1641}
1642
eadc8d9e 1643
688b88a4
RR		 1644static void ieee80211_sta_process_delba(struct net_device *dev,
1645 struct ieee80211_mgmt *mgmt, size_t len)
1646{
1647 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1648 struct sta_info *sta;
1649 u16 tid, params;
1650 u16 initiator;
1651 DECLARE_MAC_BUF(mac);
1652
d0709a65
JB		 1653 rcu_read_lock();
1654
688b88a4 1655 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1656 if (!sta) {
1657 rcu_read_unlock();
688b88a4 1658 return;
d0709a65 1659 }
688b88a4
RR		 1660
1661 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1662 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1663 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1664
1665#ifdef CONFIG_MAC80211_HT_DEBUG
1666 if (net_ratelimit())
d92684e6
RR		 1667 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1668 print_mac(mac, mgmt->sa),
2e354ed7 1669 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1670 mgmt->u.action.u.delba.reason_code);
1671#endif /* CONFIG_MAC80211_HT_DEBUG */
1672
1673 if (initiator == WLAN_BACK_INITIATOR)
1674 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1675 WLAN_BACK_INITIATOR, 0);
d92684e6 1676 else { /* WLAN_BACK_RECIPIENT */
07346f81 1677 spin_lock_bh(&sta->lock);
cee24a3e 1678 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6 1679 HT_AGG_STATE_OPERATIONAL;
07346f81 1680 spin_unlock_bh(&sta->lock);
d92684e6
RR		 1681 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1682 WLAN_BACK_RECIPIENT);
1683 }
d0709a65 1684 rcu_read_unlock();
688b88a4
RR		 1685}
1686
eadc8d9e
RR		 1687/*
1688 * After sending add Block Ack request we activated a timer until
1689 * add Block Ack response will arrive from the recipient.
1690 * If this timer expires sta_addba_resp_timer_expired will be executed.
1691 */
1692void sta_addba_resp_timer_expired(unsigned long data)
1693{
1694 /* not an elegant detour, but there is no choice as the timer passes
1695 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1696 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e 1697 * array gives the sta through container_of */
70d251b2 1698 u16 tid = *(u8 *)data;
eadc8d9e
RR		 1699 struct sta_info *temp_sta = container_of((void *)data,
1700 struct sta_info, timer_to_tid[tid]);
1701
1702 struct ieee80211_local *local = temp_sta->local;
1703 struct ieee80211_hw *hw = &local->hw;
1704 struct sta_info *sta;
1705 u8 *state;
1706
d0709a65
JB		 1707 rcu_read_lock();
1708
eadc8d9e 1709 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1710 if (!sta) {
1711 rcu_read_unlock();
eadc8d9e 1712 return;
d0709a65 1713 }
eadc8d9e 1714
cee24a3e 1715 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1716 /* check if the TID waits for addBA response */
07346f81 1717 spin_lock_bh(&sta->lock);
eadc8d9e 1718 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1719 spin_unlock_bh(&sta->lock);
eadc8d9e 1720 *state = HT_AGG_STATE_IDLE;
f4ea83dd 1721#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e
RR		 1722 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1723 "expecting addBA response there", tid);
f4ea83dd 1724#endif
eadc8d9e
RR		 1725 goto timer_expired_exit;
1726 }
1727
f4ea83dd 1728#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e 1729 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
f4ea83dd 1730#endif
eadc8d9e
RR		 1731
1732 /* go through the state check in stop_BA_session */
1733 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1734 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1735 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1736 WLAN_BACK_INITIATOR);
1737
1738timer_expired_exit:
d0709a65 1739 rcu_read_unlock();
eadc8d9e
RR		 1740}
1741
07db2183 1742/*
7b9d44cd
RR		 1743 * After accepting the AddBA Request we activated a timer,
1744 * resetting it after each frame that arrives from the originator.
07db2183
RR		 1745 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1746 */
712590de 1747static void sta_rx_agg_session_timer_expired(unsigned long data)
07db2183
RR		 1748{
1749 /* not an elegant detour, but there is no choice as the timer passes
70d251b2 1750 * only one argument, and various sta_info are needed here, so init
73651ee6 1751 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1752 * array gives the sta through container_of */
1753 u8 *ptid = (u8 *)data;
1754 u8 *timer_to_id = ptid - *ptid;
1755 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1756 timer_to_tid[0]);
1757
f4ea83dd 1758#ifdef CONFIG_MAC80211_HT_DEBUG
07db2183 1759 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
f4ea83dd 1760#endif
d0709a65
JB		 1761 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1762 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1763 WLAN_REASON_QSTA_TIMEOUT);
1764}
1765
85249e5f
RR		 1766void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1767{
1768 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1769 int i;
1770
1771 for (i = 0; i < STA_TID_NUM; i++) {
1772 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1773 WLAN_BACK_INITIATOR);
1774 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1775 WLAN_BACK_RECIPIENT,
1776 WLAN_REASON_QSTA_LEAVE_QBSS);
1777 }
1778}
07db2183 1779
b6623486
AK		 1780static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1781 struct ieee80211_msrment_ie *request_ie,
1782 const u8 *da, const u8 *bssid,
1783 u8 dialog_token)
1784{
1785 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1786 struct sk_buff *skb;
1787 struct ieee80211_mgmt *msr_report;
1788
1789 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1790 sizeof(struct ieee80211_msrment_ie));
1791
1792 if (!skb) {
1793 printk(KERN_ERR "%s: failed to allocate buffer for "
1794 "measurement report frame\n", dev->name);
1795 return;
1796 }
1797
1798 skb_reserve(skb, local->hw.extra_tx_headroom);
1799 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1800 memset(msr_report, 0, 24);
1801 memcpy(msr_report->da, da, ETH_ALEN);
1802 memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1803 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1804 msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1805 IEEE80211_STYPE_ACTION);
1806
1807 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1808 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1809 msr_report->u.action.u.measurement.action_code =
1810 WLAN_ACTION_SPCT_MSR_RPRT;
1811 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1812
1813 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1814 msr_report->u.action.u.measurement.length =
1815 sizeof(struct ieee80211_msrment_ie);
1816
1817 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1818 sizeof(struct ieee80211_msrment_ie));
1819 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1820 msr_report->u.action.u.measurement.msr_elem.mode |=
1821 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1822 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1823
1824 ieee80211_sta_tx(dev, skb, 0);
1825}
1826
1827static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1828 struct ieee80211_mgmt *mgmt,
1829 size_t len)
1830{
1831 /*
1832 * Ignoring measurement request is spec violation.
1833 * Mandatory measurements must be reported optional
1834 * measurements might be refused or reported incapable
1835 * For now just refuse
1836 * TODO: Answer basic measurement as unmeasured
1837 */
1838 ieee80211_send_refuse_measurement_request(dev,
1839 &mgmt->u.action.u.measurement.msr_elem,
1840 mgmt->sa, mgmt->bssid,
1841 mgmt->u.action.u.measurement.dialog_token);
1842}
1843
1844
f0706e82
JB		 1845static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1846 struct ieee80211_if_sta *ifsta,
1847 struct ieee80211_mgmt *mgmt,
1848 size_t len)
1849{
1850 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1851 u16 auth_alg, auth_transaction, status_code;
0795af57 1852 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1853
1854 if (ifsta->state != IEEE80211_AUTHENTICATE &&
f4ea83dd 1855 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1856 return;
f0706e82 1857
f4ea83dd 1858 if (len < 24 + 6)
f0706e82 1859 return;
f0706e82 1860
51fb61e7 1861 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1862 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1863 return;
f0706e82 1864
51fb61e7 1865 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1866 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1867 return;
f0706e82
JB		 1868
1869 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1870 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1871 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1872
51fb61e7 1873 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1874 /*
1875 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1876 * networks and most implementations do not seem to use it.
1877 * However, try to reply to authentication attempts if someone
1878 * has actually implemented this.
135a2110 1879 */
f4ea83dd 1880 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1881 return;
f0706e82
JB		 1882 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1883 }
1884
1885 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1886 auth_transaction != ifsta->auth_transaction)
f0706e82 1887 return;
f0706e82
JB		 1888
1889 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1890 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1891 u8 algs[3];
1892 const int num_algs = ARRAY_SIZE(algs);
1893 int i, pos;
1894 algs[0] = algs[1] = algs[2] = 0xff;
1895 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1896 algs[0] = WLAN_AUTH_OPEN;
1897 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1898 algs[1] = WLAN_AUTH_SHARED_KEY;
1899 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1900 algs[2] = WLAN_AUTH_LEAP;
1901 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1902 pos = 0;
1903 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1904 pos = 1;
1905 else
1906 pos = 2;
1907 for (i = 0; i < num_algs; i++) {
1908 pos++;
1909 if (pos >= num_algs)
1910 pos = 0;
1911 if (algs[pos] == ifsta->auth_alg ||
1912 algs[pos] == 0xff)
1913 continue;
1914 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1915 !ieee80211_sta_wep_configured(dev))
1916 continue;
1917 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1918 break;
1919 }
1920 }
1921 return;
1922 }
1923
1924 switch (ifsta->auth_alg) {
1925 case WLAN_AUTH_OPEN:
1926 case WLAN_AUTH_LEAP:
1927 ieee80211_auth_completed(dev, ifsta);
1928 break;
1929 case WLAN_AUTH_SHARED_KEY:
1930 if (ifsta->auth_transaction == 4)
1931 ieee80211_auth_completed(dev, ifsta);
1932 else
1933 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1934 break;
1935 }
1936}
1937
1938
1939static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1940 struct ieee80211_if_sta *ifsta,
1941 struct ieee80211_mgmt *mgmt,
1942 size_t len)
1943{
1944 u16 reason_code;
0795af57 1945 DECLARE_MAC_BUF(mac);
f0706e82 1946
f4ea83dd 1947 if (len < 24 + 2)
f0706e82 1948 return;
f0706e82 1949
f4ea83dd 1950 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1951 return;
f0706e82
JB		 1952
1953 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1954
988c0f72 1955 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f0706e82 1956 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
f0706e82
JB		 1957
1958 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1959 ifsta->state == IEEE80211_ASSOCIATE ||
1960 ifsta->state == IEEE80211_ASSOCIATED) {
1961 ifsta->state = IEEE80211_AUTHENTICATE;
1962 mod_timer(&ifsta->timer, jiffies +
1963 IEEE80211_RETRY_AUTH_INTERVAL);
1964 }
1965
1966 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1967 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1968}
1969
1970
1971static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1972 struct ieee80211_if_sta *ifsta,
1973 struct ieee80211_mgmt *mgmt,
1974 size_t len)
1975{
1976 u16 reason_code;
0795af57 1977 DECLARE_MAC_BUF(mac);
f0706e82 1978
f4ea83dd 1979 if (len < 24 + 2)
f0706e82 1980 return;
f0706e82 1981
f4ea83dd 1982 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1983 return;
f0706e82
JB		 1984
1985 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1986
d6f2da5b 1987 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1988 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1989
1990 if (ifsta->state == IEEE80211_ASSOCIATED) {
1991 ifsta->state = IEEE80211_ASSOCIATE;
1992 mod_timer(&ifsta->timer, jiffies +
1993 IEEE80211_RETRY_AUTH_INTERVAL);
1994 }
1995
1996 ieee80211_set_disassoc(dev, ifsta, 0);
1997}
1998
1999
471b3efd 2000static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2001 struct ieee80211_if_sta *ifsta,
2002 struct ieee80211_mgmt *mgmt,
2003 size_t len,
2004 int reassoc)
2005{
471b3efd
JB		 2006 struct ieee80211_local *local = sdata->local;
2007 struct net_device *dev = sdata->dev;
8318d78a 2008 struct ieee80211_supported_band *sband;
f0706e82 2009 struct sta_info *sta;
8318d78a 2010 u64 rates, basic_rates;
f0706e82
JB		 2011 u16 capab_info, status_code, aid;
2012 struct ieee802_11_elems elems;
471b3efd 2013 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 2014 u8 *pos;
2015 int i, j;
0795af57 2016 DECLARE_MAC_BUF(mac);
8318d78a 2017 bool have_higher_than_11mbit = false;
f0706e82
JB		 2018
2019 /* AssocResp and ReassocResp have identical structure, so process both
2020 * of them in this function. */
2021
f4ea83dd 2022 if (ifsta->state != IEEE80211_ASSOCIATE)
f0706e82 2023 return;
f0706e82 2024
f4ea83dd 2025 if (len < 24 + 6)
f0706e82 2026 return;
f0706e82 2027
f4ea83dd 2028 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 2029 return;
f0706e82
JB		 2030
2031 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2032 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2033 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 2034
0795af57 2035 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 2036 "status=%d aid=%d)\n",
0795af57 2037 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 2038 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 2039
2040 if (status_code != WLAN_STATUS_SUCCESS) {
2041 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2042 dev->name, status_code);
8a69aa93
DD		 2043 /* if this was a reassociation, ensure we try a "full"
2044 * association next time. This works around some broken APs
2045 * which do not correctly reject reassociation requests. */
d6f2da5b 2046 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2047 return;
2048 }
2049
1dd84aa2
JB		 2050 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2051 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2052 "set\n", dev->name, aid);
2053 aid &= ~(BIT(15) | BIT(14));
2054
f0706e82 2055 pos = mgmt->u.assoc_resp.variable;
67a4cce4 2056 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 2057
2058 if (!elems.supp_rates) {
2059 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2060 dev->name);
2061 return;
2062 }
2063
2064 printk(KERN_DEBUG "%s: associated\n", dev->name);
2065 ifsta->aid = aid;
2066 ifsta->ap_capab = capab_info;
2067
2068 kfree(ifsta->assocresp_ies);
2069 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 2070 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 2071 if (ifsta->assocresp_ies)
2072 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2073
d0709a65
JB		 2074 rcu_read_lock();
2075
f0706e82
JB		 2076 /* Add STA entry for the AP */
2077 sta = sta_info_get(local, ifsta->bssid);
2078 if (!sta) {
2079 struct ieee80211_sta_bss *bss;
73651ee6 2080 int err;
d0709a65 2081
73651ee6
JB		 2082 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2083 if (!sta) {
2084 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2085 " the AP\n", dev->name);
d0709a65 2086 rcu_read_unlock();
f0706e82
JB		 2087 return;
2088 }
65c107ab 2089 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 2090 local->hw.conf.channel->center_freq,
cffdd30d 2091 ifsta->ssid, ifsta->ssid_len);
f0706e82 2092 if (bss) {
f0706e82 2093 sta->last_signal = bss->signal;
566bfe5a 2094 sta->last_qual = bss->qual;
f0706e82 2095 sta->last_noise = bss->noise;
3e122be0 2096 ieee80211_rx_bss_put(local, bss);
f0706e82 2097 }
73651ee6
JB		 2098
2099 err = sta_info_insert(sta);
2100 if (err) {
2101 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2102 " the AP (error %d)\n", dev->name, err);
73651ee6
JB		 2103 rcu_read_unlock();
2104 return;
2105 }
f0706e82
JB		 2106 }
2107
73651ee6
JB		 2108 /*
2109 * FIXME: Do we really need to update the sta_info's information here?
2110 * We already know about the AP (we found it in our list) so it
2111 * should already be filled with the right info, no?
2112 * As is stands, all this is racy because typically we assume
2113 * the information that is filled in here (except flags) doesn't
2114 * change while a STA structure is alive. As such, it should move
2115 * to between the sta_info_alloc() and sta_info_insert() above.
2116 */
2117
07346f81
JB		 2118 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2119 WLAN_STA_AUTHORIZED);
f0706e82
JB		 2120
2121 rates = 0;
8318d78a
JB		 2122 basic_rates = 0;
2123 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2124
f0706e82
JB		 2125 for (i = 0; i < elems.supp_rates_len; i++) {
2126 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 2127
2128 if (rate > 110)
2129 have_higher_than_11mbit = true;
2130
2131 for (j = 0; j < sband->n_bitrates; j++) {
2132 if (sband->bitrates[j].bitrate == rate)
f0706e82 2133 rates |= BIT(j);
8318d78a
JB		 2134 if (elems.supp_rates[i] & 0x80)
2135 basic_rates |= BIT(j);
2136 }
f0706e82 2137 }
8318d78a 2138
f0706e82
JB		 2139 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2140 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 2141
2142 if (rate > 110)
2143 have_higher_than_11mbit = true;
2144
2145 for (j = 0; j < sband->n_bitrates; j++) {
2146 if (sband->bitrates[j].bitrate == rate)
f0706e82 2147 rates |= BIT(j);
8318d78a
JB		 2148 if (elems.ext_supp_rates[i] & 0x80)
2149 basic_rates |= BIT(j);
2150 }
f0706e82 2151 }
8318d78a
JB		 2152
2153 sta->supp_rates[local->hw.conf.channel->band] = rates;
2154 sdata->basic_rates = basic_rates;
2155
2156 /* cf. IEEE 802.11 9.2.12 */
2157 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2158 have_higher_than_11mbit)
2159 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2160 else
2161 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2162
3434fbd3
JB		 2163 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2164 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
d3c990fb 2165 struct ieee80211_ht_bss_info bss_info;
d3c990fb
RR		 2166 ieee80211_ht_cap_ie_to_ht_info(
2167 (struct ieee80211_ht_cap *)
2168 elems.ht_cap_elem, &sta->ht_info);
2169 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2170 (struct ieee80211_ht_addt_info *)
2171 elems.ht_info_elem, &bss_info);
38668c05 2172 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
d3c990fb
RR		 2173 }
2174
f0706e82
JB		 2175 rate_control_rate_init(sta, local);
2176
3434fbd3 2177 if (elems.wmm_param) {
07346f81 2178 set_sta_flags(sta, WLAN_STA_WME);
e5f98f2d 2179 rcu_read_unlock();
f0706e82
JB		 2180 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2181 elems.wmm_param_len);
e5f98f2d
JB		 2182 } else
2183 rcu_read_unlock();
f0706e82 2184
21c0cbe7
TW		 2185 /* set AID and assoc capability,
2186 * ieee80211_set_associated() will tell the driver */
8318d78a 2187 bss_conf->aid = aid;
21c0cbe7 2188 bss_conf->assoc_capability = capab_info;
8318d78a 2189 ieee80211_set_associated(dev, ifsta, 1);
f0706e82 2190
f0706e82
JB		 2191 ieee80211_associated(dev, ifsta);
2192}
2193
2194
2195/* Caller must hold local->sta_bss_lock */
2196static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2197 struct ieee80211_sta_bss *bss)
2198{
2199 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 2200 u8 hash_idx;
902acc78
JB		 2201
2202 if (bss_mesh_cfg(bss))
2203 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2204 bss_mesh_id_len(bss));
f709fc69 2205 else
f709fc69 2206 hash_idx = STA_HASH(bss->bssid);
902acc78 2207
f709fc69
LCC		 2208 bss->hnext = local->sta_bss_hash[hash_idx];
2209 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 2210}
2211
2212
2213/* Caller must hold local->sta_bss_lock */
3e122be0 2214static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
f0706e82
JB		 2215 struct ieee80211_sta_bss *bss)
2216{
f0706e82
JB		 2217 struct ieee80211_sta_bss *b, *prev = NULL;
2218 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2219 while (b) {
2220 if (b == bss) {
2221 if (!prev)
2222 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2223 bss->hnext;
2224 else
2225 prev->hnext = bss->hnext;
2226 break;
2227 }
2228 prev = b;
2229 b = b->hnext;
2230 }
2231}
2232
2233
2234static struct ieee80211_sta_bss *
8318d78a 2235ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2236 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2237{
2238 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2239 struct ieee80211_sta_bss *bss;
2240
dd00cc48 2241 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 2242 if (!bss)
2243 return NULL;
f0706e82
JB		 2244 atomic_inc(&bss->users);
2245 atomic_inc(&bss->users);
2246 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2247 bss->freq = freq;
cffdd30d
JL		 2248 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2249 memcpy(bss->ssid, ssid, ssid_len);
2250 bss->ssid_len = ssid_len;
2251 }
f0706e82
JB		 2252
2253 spin_lock_bh(&local->sta_bss_lock);
2254 /* TODO: order by RSSI? */
2255 list_add_tail(&bss->list, &local->sta_bss_list);
2256 __ieee80211_rx_bss_hash_add(dev, bss);
2257 spin_unlock_bh(&local->sta_bss_lock);
2258 return bss;
2259}
2260
f0706e82 2261static struct ieee80211_sta_bss *
8318d78a 2262ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2263 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2264{
2265 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2266 struct ieee80211_sta_bss *bss;
2267
2268 spin_lock_bh(&local->sta_bss_lock);
2269 bss = local->sta_bss_hash[STA_HASH(bssid)];
2270 while (bss) {
902acc78
JB		 2271 if (!bss_mesh_cfg(bss) &&
2272 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2273 bss->freq == freq &&
cffdd30d
JL		 2274 bss->ssid_len == ssid_len &&
2275 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2276 atomic_inc(&bss->users);
2277 break;
2278 }
2279 bss = bss->hnext;
2280 }
2281 spin_unlock_bh(&local->sta_bss_lock);
2282 return bss;
2283}
2284
f709fc69
LCC		 2285#ifdef CONFIG_MAC80211_MESH
2286static struct ieee80211_sta_bss *
2287ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2288 u8 *mesh_cfg, int freq)
2289{
2290 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2291 struct ieee80211_sta_bss *bss;
2292
2293 spin_lock_bh(&local->sta_bss_lock);
2294 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2295 while (bss) {
902acc78
JB		 2296 if (bss_mesh_cfg(bss) &&
2297 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2298 bss->freq == freq &&
2299 mesh_id_len == bss->mesh_id_len &&
2300 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2301 mesh_id_len))) {
2302 atomic_inc(&bss->users);
2303 break;
2304 }
2305 bss = bss->hnext;
2306 }
2307 spin_unlock_bh(&local->sta_bss_lock);
2308 return bss;
2309}
2310
2311static struct ieee80211_sta_bss *
2312ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
05e5e883 2313 u8 *mesh_cfg, int mesh_config_len, int freq)
f709fc69
LCC		 2314{
2315 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2316 struct ieee80211_sta_bss *bss;
2317
05e5e883
LCC		 2318 if (mesh_config_len != MESH_CFG_LEN)
2319 return NULL;
2320
f709fc69
LCC		 2321 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2322 if (!bss)
2323 return NULL;
2324
24736701 2325 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
f709fc69
LCC		 2326 if (!bss->mesh_cfg) {
2327 kfree(bss);
2328 return NULL;
2329 }
2330
2331 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2332 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2333 if (!bss->mesh_id) {
2334 kfree(bss->mesh_cfg);
2335 kfree(bss);
2336 return NULL;
2337 }
2338 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2339 }
2340
2341 atomic_inc(&bss->users);
2342 atomic_inc(&bss->users);
24736701 2343 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
f709fc69
LCC		 2344 bss->mesh_id_len = mesh_id_len;
2345 bss->freq = freq;
2346 spin_lock_bh(&local->sta_bss_lock);
2347 /* TODO: order by RSSI? */
2348 list_add_tail(&bss->list, &local->sta_bss_list);
2349 __ieee80211_rx_bss_hash_add(dev, bss);
2350 spin_unlock_bh(&local->sta_bss_lock);
2351 return bss;
2352}
2353#endif
f0706e82
JB		 2354
2355static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2356{
2357 kfree(bss->wpa_ie);
2358 kfree(bss->rsn_ie);
2359 kfree(bss->wmm_ie);
c7153508 2360 kfree(bss->ht_ie);
9306102e 2361 kfree(bss->ht_add_ie);
902acc78
JB		 2362 kfree(bss_mesh_id(bss));
2363 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2364 kfree(bss);
2365}
2366
2367
3e122be0 2368static void ieee80211_rx_bss_put(struct ieee80211_local *local,
f0706e82
JB		 2369 struct ieee80211_sta_bss *bss)
2370{
1ebebea8
PE		 2371 local_bh_disable();
2372 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2373 local_bh_enable();
f0706e82 2374 return;
1ebebea8 2375 }
f0706e82 2376
3e122be0 2377 __ieee80211_rx_bss_hash_del(local, bss);
f0706e82
JB		 2378 list_del(&bss->list);
2379 spin_unlock_bh(&local->sta_bss_lock);
2380 ieee80211_rx_bss_free(bss);
2381}
2382
2383
3e122be0 2384void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
f0706e82 2385{
f0706e82
JB		 2386 spin_lock_init(&local->sta_bss_lock);
2387 INIT_LIST_HEAD(&local->sta_bss_list);
2388}
2389
2390
3e122be0 2391void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
f0706e82 2392{
f0706e82
JB		 2393 struct ieee80211_sta_bss *bss, *tmp;
2394
2395 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
3e122be0 2396 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2397}
2398
2399
a607268a
BR		 2400static int ieee80211_sta_join_ibss(struct net_device *dev,
2401 struct ieee80211_if_sta *ifsta,
2402 struct ieee80211_sta_bss *bss)
2403{
2404 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2405 int res, rates, i, j;
2406 struct sk_buff *skb;
2407 struct ieee80211_mgmt *mgmt;
a607268a
BR		 2408 u8 *pos;
2409 struct ieee80211_sub_if_data *sdata;
2410 struct ieee80211_supported_band *sband;
507b06d0 2411 union iwreq_data wrqu;
a607268a
BR		 2412
2413 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2414
9dd6aed0
JB		 2415 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2416
a607268a 2417 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2418 sta_info_flush_delayed(sdata);
a607268a
BR		 2419
2420 if (local->ops->reset_tsf) {
2421 /* Reset own TSF to allow time synchronization work. */
2422 local->ops->reset_tsf(local_to_hw(local));
2423 }
2424 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 2425 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 2426 if (res)
2427 return res;
2428
2429 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2430
a607268a
BR		 2431 sdata->drop_unencrypted = bss->capability &
2432 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2433
be038b37 2434 res = ieee80211_set_freq(dev, bss->freq);
a607268a 2435
be038b37
AK		 2436 if (res)
2437 return res;
a607268a 2438
9d139c81 2439 /* Build IBSS probe response */
a607268a 2440 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 2441 if (skb) {
a607268a
BR		 2442 skb_reserve(skb, local->hw.extra_tx_headroom);
2443
2444 mgmt = (struct ieee80211_mgmt *)
2445 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2446 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2447 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
9d139c81 2448 IEEE80211_STYPE_PROBE_RESP);
a607268a
BR		 2449 memset(mgmt->da, 0xff, ETH_ALEN);
2450 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2451 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2452 mgmt->u.beacon.beacon_int =
2453 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 2454 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 2455 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2456
2457 pos = skb_put(skb, 2 + ifsta->ssid_len);
2458 *pos++ = WLAN_EID_SSID;
2459 *pos++ = ifsta->ssid_len;
2460 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2461
2462 rates = bss->supp_rates_len;
2463 if (rates > 8)
2464 rates = 8;
2465 pos = skb_put(skb, 2 + rates);
2466 *pos++ = WLAN_EID_SUPP_RATES;
2467 *pos++ = rates;
2468 memcpy(pos, bss->supp_rates, rates);
2469
2470 if (bss->band == IEEE80211_BAND_2GHZ) {
2471 pos = skb_put(skb, 2 + 1);
2472 *pos++ = WLAN_EID_DS_PARAMS;
2473 *pos++ = 1;
2474 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2475 }
2476
2477 pos = skb_put(skb, 2 + 2);
2478 *pos++ = WLAN_EID_IBSS_PARAMS;
2479 *pos++ = 2;
2480 /* FIX: set ATIM window based on scan results */
2481 *pos++ = 0;
2482 *pos++ = 0;
2483
2484 if (bss->supp_rates_len > 8) {
2485 rates = bss->supp_rates_len - 8;
2486 pos = skb_put(skb, 2 + rates);
2487 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2488 *pos++ = rates;
2489 memcpy(pos, &bss->supp_rates[8], rates);
2490 }
2491
9d139c81 2492 ifsta->probe_resp = skb;
e039fa4a 2493
9d139c81
JB		 2494 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2495 }
a607268a 2496
9d139c81
JB		 2497 rates = 0;
2498 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2499 for (i = 0; i < bss->supp_rates_len; i++) {
2500 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2501 for (j = 0; j < sband->n_bitrates; j++)
2502 if (sband->bitrates[j].bitrate == bitrate)
2503 rates |= BIT(j);
a607268a 2504 }
9d139c81
JB		 2505 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2506
2507 ieee80211_sta_def_wmm_params(dev, bss, 1);
a607268a
BR		 2508
2509 ifsta->state = IEEE80211_IBSS_JOINED;
2510 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2511
507b06d0
DW		 2512 memset(&wrqu, 0, sizeof(wrqu));
2513 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2514 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 2515
2516 return res;
2517}
2518
f709fc69
LCC		 2519u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2520 struct ieee802_11_elems *elems,
2521 enum ieee80211_band band)
2522{
2523 struct ieee80211_supported_band *sband;
2524 struct ieee80211_rate *bitrates;
2525 size_t num_rates;
2526 u64 supp_rates;
2527 int i, j;
2528 sband = local->hw.wiphy->bands[band];
2529
2530 if (!sband) {
2531 WARN_ON(1);
2532 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2533 }
2534
2535 bitrates = sband->bitrates;
2536 num_rates = sband->n_bitrates;
2537 supp_rates = 0;
2538 for (i = 0; i < elems->supp_rates_len +
2539 elems->ext_supp_rates_len; i++) {
2540 u8 rate = 0;
2541 int own_rate;
2542 if (i < elems->supp_rates_len)
2543 rate = elems->supp_rates[i];
2544 else if (elems->ext_supp_rates)
2545 rate = elems->ext_supp_rates
2546 [i - elems->supp_rates_len];
2547 own_rate = 5 * (rate & 0x7f);
2548 for (j = 0; j < num_rates; j++)
2549 if (bitrates[j].bitrate == own_rate)
2550 supp_rates |= BIT(j);
2551 }
2552 return supp_rates;
2553}
2554
a607268a 2555
f0706e82
JB		 2556static void ieee80211_rx_bss_info(struct net_device *dev,
2557 struct ieee80211_mgmt *mgmt,
2558 size_t len,
2559 struct ieee80211_rx_status *rx_status,
ae6a44e3 2560 struct ieee802_11_elems *elems,
f0706e82
JB		 2561 int beacon)
2562{
2563 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 2564 int freq, clen;
f0706e82
JB		 2565 struct ieee80211_sta_bss *bss;
2566 struct sta_info *sta;
2567 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2568 u64 beacon_timestamp, rx_timestamp;
fab7d4a2 2569 struct ieee80211_channel *channel;
0795af57
JP		 2570 DECLARE_MAC_BUF(mac);
2571 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2572
2573 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2574 return; /* ignore ProbeResp to foreign address */
2575
9d9bf77d 2576 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
f0706e82 2577
ae6a44e3
EK		 2578 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2579 elems->mesh_config && mesh_matches_local(elems, dev)) {
2580 u64 rates = ieee80211_sta_get_rates(local, elems,
902acc78
JB		 2581 rx_status->band);
2582
2583 mesh_neighbour_update(mgmt->sa, rates, dev,
ae6a44e3 2584 mesh_peer_accepts_plinks(elems, dev));
902acc78 2585 }
f709fc69 2586
d0709a65
JB		 2587 rcu_read_lock();
2588
ae6a44e3 2589 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
f0706e82
JB		 2590 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2591 (sta = sta_info_get(local, mgmt->sa))) {
f709fc69 2592 u64 prev_rates;
ae6a44e3 2593 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
f709fc69 2594 rx_status->band);
f0706e82 2595
8318d78a
JB		 2596 prev_rates = sta->supp_rates[rx_status->band];
2597 sta->supp_rates[rx_status->band] &= supp_rates;
2598 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2599 /* No matching rates - this should not really happen.
2600 * Make sure that at least one rate is marked
2601 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2602 sta->supp_rates[rx_status->band] =
2603 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2604 }
f0706e82
JB		 2605 }
2606
d0709a65
JB		 2607 rcu_read_unlock();
2608
ae6a44e3
EK		 2609 if (elems->ds_params && elems->ds_params_len == 1)
2610 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
f0706e82 2611 else
8318d78a 2612 freq = rx_status->freq;
f0706e82 2613
fab7d4a2
JB		 2614 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2615
2616 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2617 return;
2618
f709fc69 2619#ifdef CONFIG_MAC80211_MESH
ae6a44e3
EK		 2620 if (elems->mesh_config)
2621 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2622 elems->mesh_id_len, elems->mesh_config, freq);
f709fc69
LCC		 2623 else
2624#endif
2625 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
ae6a44e3 2626 elems->ssid, elems->ssid_len);
f709fc69
LCC		 2627 if (!bss) {
2628#ifdef CONFIG_MAC80211_MESH
ae6a44e3
EK		 2629 if (elems->mesh_config)
2630 bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2631 elems->mesh_id_len, elems->mesh_config,
2632 elems->mesh_config_len, freq);
f709fc69
LCC		 2633 else
2634#endif
2635 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
ae6a44e3 2636 elems->ssid, elems->ssid_len);
f0706e82
JB		 2637 if (!bss)
2638 return;
2639 } else {
2640#if 0
2641 /* TODO: order by RSSI? */
2642 spin_lock_bh(&local->sta_bss_lock);
2643 list_move_tail(&bss->list, &local->sta_bss_list);
2644 spin_unlock_bh(&local->sta_bss_lock);
2645#endif
2646 }
2647
5628221c 2648 /* save the ERP value so that it is available at association time */
ae6a44e3
EK		 2649 if (elems->erp_info && elems->erp_info_len >= 1) {
2650 bss->erp_value = elems->erp_info[0];
5628221c
DD		 2651 bss->has_erp_value = 1;
2652 }
2653
ae6a44e3
EK		 2654 if (elems->ht_cap_elem &&
2655 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2656 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
30b89b0f 2657 kfree(bss->ht_ie);
ae6a44e3 2658 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
30b89b0f 2659 if (bss->ht_ie) {
ae6a44e3
EK		 2660 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2661 elems->ht_cap_elem_len + 2);
2662 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
30b89b0f
JB		 2663 } else
2664 bss->ht_ie_len = 0;
ae6a44e3 2665 } else if (!elems->ht_cap_elem && bss->ht_ie) {
30b89b0f
JB		 2666 kfree(bss->ht_ie);
2667 bss->ht_ie = NULL;
2668 bss->ht_ie_len = 0;
2669 }
2670
ae6a44e3 2671 if (elems->ht_info_elem &&
9306102e 2672 (!bss->ht_add_ie ||
ae6a44e3
EK		 2673 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2674 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2675 elems->ht_info_elem_len))) {
9306102e
EG		 2676 kfree(bss->ht_add_ie);
2677 bss->ht_add_ie =
ae6a44e3 2678 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
9306102e 2679 if (bss->ht_add_ie) {
ae6a44e3
EK		 2680 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2681 elems->ht_info_elem_len + 2);
2682 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
9306102e
EG		 2683 } else
2684 bss->ht_add_ie_len = 0;
ae6a44e3 2685 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
9306102e
EG		 2686 kfree(bss->ht_add_ie);
2687 bss->ht_add_ie = NULL;
2688 bss->ht_add_ie_len = 0;
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
30b89b0f
JB		 2722 bss->band = rx_status->band;
2723
2724 bss->timestamp = beacon_timestamp;
2725 bss->last_update = jiffies;
30b89b0f
JB		 2726 bss->signal = rx_status->signal;
2727 bss->noise = rx_status->noise;
566bfe5a 2728 bss->qual = rx_status->qual;
30b89b0f
JB		 2729 if (!beacon && !bss->probe_resp)
2730 bss->probe_resp = true;
2731
2732 /*
2733 * In STA mode, the remaining parameters should not be overridden
2734 * by beacons because they're not necessarily accurate there.
2735 */
2736 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2737 bss->probe_resp && beacon) {
3e122be0 2738 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 2739 return;
2740 }
2741
ae6a44e3
EK		 2742 if (elems->wpa &&
2743 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2744 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
f0706e82 2745 kfree(bss->wpa_ie);
ae6a44e3 2746 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
f0706e82 2747 if (bss->wpa_ie) {
ae6a44e3
EK		 2748 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2749 bss->wpa_ie_len = elems->wpa_len + 2;
f0706e82
JB		 2750 } else
2751 bss->wpa_ie_len = 0;
ae6a44e3 2752 } else if (!elems->wpa && bss->wpa_ie) {
f0706e82
JB		 2753 kfree(bss->wpa_ie);
2754 bss->wpa_ie = NULL;
2755 bss->wpa_ie_len = 0;
2756 }
2757
ae6a44e3
EK		 2758 if (elems->rsn &&
2759 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2760 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
f0706e82 2761 kfree(bss->rsn_ie);
ae6a44e3 2762 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
f0706e82 2763 if (bss->rsn_ie) {
ae6a44e3
EK		 2764 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2765 bss->rsn_ie_len = elems->rsn_len + 2;
f0706e82
JB		 2766 } else
2767 bss->rsn_ie_len = 0;
ae6a44e3 2768 } else if (!elems->rsn && bss->rsn_ie) {
f0706e82
JB		 2769 kfree(bss->rsn_ie);
2770 bss->rsn_ie = NULL;
2771 bss->rsn_ie_len = 0;
2772 }
2773
30b89b0f
JB		 2774 /*
2775 * Cf.
2776 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2777 *
2778 * quoting:
2779 *
2780 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2781 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2782 * Alliance (September 1, 2004) is incorporated by reference herein.
2783 * The inclusion of the WMM Parameters in probe responses and
2784 * association responses is mandatory for WMM enabled networks. The
2785 * inclusion of the WMM Parameters in beacons, however, is optional.
2786 */
2787
ae6a44e3
EK		 2788 if (elems->wmm_param &&
2789 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2790 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
f0706e82 2791 kfree(bss->wmm_ie);
ae6a44e3 2792 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
f0706e82 2793 if (bss->wmm_ie) {
ae6a44e3
EK		 2794 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2795 elems->wmm_param_len + 2);
2796 bss->wmm_ie_len = elems->wmm_param_len + 2;
f0706e82
JB		 2797 } else
2798 bss->wmm_ie_len = 0;
ae6a44e3
EK		 2799 } else if (elems->wmm_info &&
2800 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2801 memcmp(bss->wmm_ie, elems->wmm_info,
2802 elems->wmm_info_len))) {
a46f025d
AK		 2803 /* As for certain AP's Fifth bit is not set in WMM IE in
2804 * beacon frames.So while parsing the beacon frame the
2805 * wmm_info structure is used instead of wmm_param.
2806 * wmm_info structure was never used to set bss->wmm_ie.
2807 * This code fixes this problem by copying the WME
2808 * information from wmm_info to bss->wmm_ie and enabling
2809 * n-band association.
2810 */
2811 kfree(bss->wmm_ie);
ae6a44e3 2812 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
a46f025d 2813 if (bss->wmm_ie) {
ae6a44e3
EK		 2814 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2815 elems->wmm_info_len + 2);
2816 bss->wmm_ie_len = elems->wmm_info_len + 2;
a46f025d
AK		 2817 } else
2818 bss->wmm_ie_len = 0;
ae6a44e3 2819 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
f0706e82
JB		 2820 kfree(bss->wmm_ie);
2821 bss->wmm_ie = NULL;
2822 bss->wmm_ie_len = 0;
2823 }
9d9bf77d
BR		 2824
2825 /* check if we need to merge IBSS */
2826 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2827 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2828 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 2829 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 2830 elems->ssid_len == sdata->u.sta.ssid_len &&
2831 memcmp(elems->ssid, sdata->u.sta.ssid,
2832 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 2833 if (rx_status->flag & RX_FLAG_TSFT) {
2834 /* in order for correct IBSS merging we need mactime
2835 *
2836 * since mactime is defined as the time the first data
2837 * symbol of the frame hits the PHY, and the timestamp
2838 * of the beacon is defined as "the time that the data
2839 * symbol containing the first bit of the timestamp is
2840 * transmitted to the PHY plus the transmitting STA’s
2841 * delays through its local PHY from the MAC-PHY
2842 * interface to its interface with the WM"
2843 * (802.11 11.1.2) - equals the time this bit arrives at
2844 * the receiver - we have to take into account the
2845 * offset between the two.
2846 * e.g: at 1 MBit that means mactime is 192 usec earlier
2847 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2848 */
2849 int rate = local->hw.wiphy->bands[rx_status->band]->
2850 bitrates[rx_status->rate_idx].bitrate;
2851 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2852 } else if (local && local->ops && local->ops->get_tsf)
2853 /* second best option: get current TSF */
2854 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2855 else
2856 /* can't merge without knowing the TSF */
2857 rx_timestamp = -1LLU;
2858#ifdef CONFIG_MAC80211_IBSS_DEBUG
2859 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2860 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2861 print_mac(mac, mgmt->sa),
2862 print_mac(mac2, mgmt->bssid),
2863 (unsigned long long)rx_timestamp,
2864 (unsigned long long)beacon_timestamp,
2865 (unsigned long long)(rx_timestamp - beacon_timestamp),
2866 jiffies);
2867#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2868 if (beacon_timestamp > rx_timestamp) {
fba4a1e6 2869#ifndef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 2870 printk(KERN_DEBUG "%s: beacon TSF higher than "
2871 "local TSF - IBSS merge with BSSID %s\n",
2872 dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 2873#endif
9d9bf77d
BR		 2874 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2875 ieee80211_ibss_add_sta(dev, NULL,
87291c02
VK		 2876 mgmt->bssid, mgmt->sa,
2877 BIT(rx_status->rate_idx));
9d9bf77d
BR		 2878 }
2879 }
2880
3e122be0 2881 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2882}
2883
2884
2885static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2886 struct ieee80211_mgmt *mgmt,
2887 size_t len,
2888 struct ieee80211_rx_status *rx_status)
2889{
ae6a44e3
EK		 2890 size_t baselen;
2891 struct ieee802_11_elems elems;
2892
2893 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2894 if (baselen > len)
2895 return;
2896
2897 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2898 &elems);
2899
2900 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
f0706e82
JB		 2901}
2902
2903
2904static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2905 struct ieee80211_mgmt *mgmt,
2906 size_t len,
2907 struct ieee80211_rx_status *rx_status)
2908{
f0706e82
JB		 2909 struct ieee80211_sub_if_data *sdata;
2910 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2911 size_t baselen;
2912 struct ieee802_11_elems elems;
d3c990fb
RR		 2913 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2914 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2915 u32 changed = 0;
f0706e82 2916
ae6a44e3
EK		 2917 /* Process beacon from the current BSS */
2918 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2919 if (baselen > len)
2920 return;
2921
2922 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2923
2924 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
f0706e82
JB		 2925
2926 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2927 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2928 return;
2929 ifsta = &sdata->u.sta;
2930
d6f2da5b 2931 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2932 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2933 return;
2934
3434fbd3
JB		 2935 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2936 elems.wmm_param_len);
d18ef29f
RC		 2937
2938 /* Do not send changes to driver if we are scanning. This removes
2939 * requirement that driver's bss_info_changed function needs to be
2940 * atomic. */
2941 if (local->sta_sw_scanning || local->sta_hw_scanning)
2942 return;
2943
5628221c 2944 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2945 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2946 else {
2947 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2948 changed |= ieee80211_handle_protect_preamb(sdata, false,
2949 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2950 }
f0706e82 2951
d3c990fb 2952 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2953 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2954 struct ieee80211_ht_bss_info bss_info;
2955
2956 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2957 (struct ieee80211_ht_addt_info *)
2958 elems.ht_info_elem, &bss_info);
38668c05
TW		 2959 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2960 &bss_info);
d3c990fb
RR		 2961 }
2962
471b3efd 2963 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2964}
2965
2966
2967static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2968 struct ieee80211_if_sta *ifsta,
2969 struct ieee80211_mgmt *mgmt,
2970 size_t len,
2971 struct ieee80211_rx_status *rx_status)
2972{
2973 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2974 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2975 int tx_last_beacon;
2976 struct sk_buff *skb;
2977 struct ieee80211_mgmt *resp;
2978 u8 *pos, *end;
0795af57
JP		 2979 DECLARE_MAC_BUF(mac);
2980#ifdef CONFIG_MAC80211_IBSS_DEBUG
2981 DECLARE_MAC_BUF(mac2);
2982 DECLARE_MAC_BUF(mac3);
2983#endif
f0706e82 2984
51fb61e7 2985 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2986 ifsta->state != IEEE80211_IBSS_JOINED ||
2987 len < 24 + 2 || !ifsta->probe_resp)
2988 return;
2989
2990 if (local->ops->tx_last_beacon)
2991 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2992 else
2993 tx_last_beacon = 1;
2994
2995#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2996 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2997 "%s (tx_last_beacon=%d)\n",
2998 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2999 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 3000#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3001
3002 if (!tx_last_beacon)
3003 return;
3004
3005 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3006 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3007 return;
3008
3009 end = ((u8 *) mgmt) + len;
3010 pos = mgmt->u.probe_req.variable;
3011 if (pos[0] != WLAN_EID_SSID ||
3012 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 3013#ifdef CONFIG_MAC80211_IBSS_DEBUG
3014 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3015 "from %s\n",
3016 dev->name, print_mac(mac, mgmt->sa));
3017#endif
f0706e82
JB		 3018 return;
3019 }
3020 if (pos[1] != 0 &&
3021 (pos[1] != ifsta->ssid_len ||
3022 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3023 /* Ignore ProbeReq for foreign SSID */
3024 return;
3025 }
3026
3027 /* Reply with ProbeResp */
0ec0b7ac 3028 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 3029 if (!skb)
3030 return;
3031
3032 resp = (struct ieee80211_mgmt *) skb->data;
3033 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3034#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3035 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3036 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 3037#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3038 ieee80211_sta_tx(dev, skb, 0);
3039}
3040
4e20cb29
JB		 3041static void ieee80211_rx_mgmt_action(struct net_device *dev,
3042 struct ieee80211_if_sta *ifsta,
3043 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 3044 size_t len,
3045 struct ieee80211_rx_status *rx_status)
9f985b0e 3046{
f709fc69 3047 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b6623486 3048 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 3049
9f985b0e
RR		 3050 if (len < IEEE80211_MIN_ACTION_SIZE)
3051 return;
3052
3053 switch (mgmt->u.action.category) {
b6623486
AK		 3054 case WLAN_CATEGORY_SPECTRUM_MGMT:
3055 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3056 break;
3057 switch (mgmt->u.action.u.chan_switch.action_code) {
3058 case WLAN_ACTION_SPCT_MSR_REQ:
3059 if (len < (IEEE80211_MIN_ACTION_SIZE +
3060 sizeof(mgmt->u.action.u.measurement)))
3061 break;
3062 ieee80211_sta_process_measurement_req(dev, mgmt, len);
3063 break;
3064 }
3065 break;
9f985b0e
RR		 3066 case WLAN_CATEGORY_BACK:
3067 switch (mgmt->u.action.u.addba_req.action_code) {
3068 case WLAN_ACTION_ADDBA_REQ:
3069 if (len < (IEEE80211_MIN_ACTION_SIZE +
3070 sizeof(mgmt->u.action.u.addba_req)))
3071 break;
3072 ieee80211_sta_process_addba_request(dev, mgmt, len);
3073 break;
eadc8d9e
RR		 3074 case WLAN_ACTION_ADDBA_RESP:
3075 if (len < (IEEE80211_MIN_ACTION_SIZE +
3076 sizeof(mgmt->u.action.u.addba_resp)))
3077 break;
3078 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3079 break;
688b88a4
RR		 3080 case WLAN_ACTION_DELBA:
3081 if (len < (IEEE80211_MIN_ACTION_SIZE +
3082 sizeof(mgmt->u.action.u.delba)))
3083 break;
3084 ieee80211_sta_process_delba(dev, mgmt, len);
3085 break;
9f985b0e
RR		 3086 }
3087 break;
f709fc69 3088 case PLINK_CATEGORY:
902acc78 3089 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 3090 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3091 break;
f709fc69 3092 case MESH_PATH_SEL_CATEGORY:
902acc78 3093 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 3094 mesh_rx_path_sel_frame(dev, mgmt, len);
3095 break;
9f985b0e
RR		 3096 }
3097}
f0706e82
JB		 3098
3099void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3100 struct ieee80211_rx_status *rx_status)
3101{
3102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3103 struct ieee80211_sub_if_data *sdata;
3104 struct ieee80211_if_sta *ifsta;
3105 struct ieee80211_mgmt *mgmt;
3106 u16 fc;
3107
3108 if (skb->len < 24)
3109 goto fail;
3110
3111 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3112 ifsta = &sdata->u.sta;
3113
3114 mgmt = (struct ieee80211_mgmt *) skb->data;
3115 fc = le16_to_cpu(mgmt->frame_control);
3116
3117 switch (fc & IEEE80211_FCTL_STYPE) {
3118 case IEEE80211_STYPE_PROBE_REQ:
3119 case IEEE80211_STYPE_PROBE_RESP:
3120 case IEEE80211_STYPE_BEACON:
f709fc69 3121 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 3122 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3123 case IEEE80211_STYPE_AUTH:
3124 case IEEE80211_STYPE_ASSOC_RESP:
3125 case IEEE80211_STYPE_REASSOC_RESP:
3126 case IEEE80211_STYPE_DEAUTH:
3127 case IEEE80211_STYPE_DISASSOC:
3128 skb_queue_tail(&ifsta->skb_queue, skb);
3129 queue_work(local->hw.workqueue, &ifsta->work);
3130 return;
f0706e82
JB		 3131 }
3132
3133 fail:
3134 kfree_skb(skb);
3135}
3136
3137
3138static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3139 struct sk_buff *skb)
3140{
3141 struct ieee80211_rx_status *rx_status;
3142 struct ieee80211_sub_if_data *sdata;
3143 struct ieee80211_if_sta *ifsta;
3144 struct ieee80211_mgmt *mgmt;
3145 u16 fc;
3146
3147 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3148 ifsta = &sdata->u.sta;
3149
3150 rx_status = (struct ieee80211_rx_status *) skb->cb;
3151 mgmt = (struct ieee80211_mgmt *) skb->data;
3152 fc = le16_to_cpu(mgmt->frame_control);
3153
3154 switch (fc & IEEE80211_FCTL_STYPE) {
3155 case IEEE80211_STYPE_PROBE_REQ:
3156 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3157 rx_status);
3158 break;
3159 case IEEE80211_STYPE_PROBE_RESP:
3160 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3161 break;
3162 case IEEE80211_STYPE_BEACON:
3163 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3164 break;
3165 case IEEE80211_STYPE_AUTH:
3166 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3167 break;
3168 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 3169 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 3170 break;
3171 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 3172 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 3173 break;
3174 case IEEE80211_STYPE_DEAUTH:
3175 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3176 break;
3177 case IEEE80211_STYPE_DISASSOC:
3178 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3179 break;
9f985b0e 3180 case IEEE80211_STYPE_ACTION:
f709fc69 3181 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
9f985b0e 3182 break;
f0706e82
JB		 3183 }
3184
3185 kfree_skb(skb);
3186}
3187
3188
9ae54c84 3189ieee80211_rx_result
ece8eddd
ZY		 3190ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3191 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 3192{
3193 struct ieee80211_mgmt *mgmt;
4e3996fe 3194 __le16 fc;
f0706e82 3195
ece8eddd 3196 if (skb->len < 2)
e4c26add 3197 return RX_DROP_UNUSABLE;
f0706e82
JB		 3198
3199 mgmt = (struct ieee80211_mgmt *) skb->data;
4e3996fe 3200 fc = mgmt->frame_control;
f0706e82 3201
4e3996fe 3202 if (ieee80211_is_ctl(fc))
9ae54c84 3203 return RX_CONTINUE;
ece8eddd
ZY		 3204
3205 if (skb->len < 24)
e4c26add 3206 return RX_DROP_MONITOR;
ece8eddd 3207
4e3996fe
HH		 3208 if (ieee80211_is_probe_resp(fc)) {
3209 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3210 dev_kfree_skb(skb);
3211 return RX_QUEUED;
f0706e82 3212 }
4e3996fe
HH		 3213
3214 if (ieee80211_is_beacon(fc)) {
3215 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3216 dev_kfree_skb(skb);
3217 return RX_QUEUED;
3218 }
3219
9ae54c84 3220 return RX_CONTINUE;
f0706e82
JB		 3221}
3222
3223
3224static int ieee80211_sta_active_ibss(struct net_device *dev)
3225{
3226 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3227 int active = 0;
3228 struct sta_info *sta;
d0709a65 3229 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3230
d0709a65
JB		 3231 rcu_read_lock();
3232
3233 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3234 if (sta->sdata == sdata &&
f0706e82
JB		 3235 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3236 jiffies)) {
3237 active++;
3238 break;
3239 }
3240 }
d0709a65
JB		 3241
3242 rcu_read_unlock();
f0706e82
JB		 3243
3244 return active;
3245}
3246
3247
f709fc69 3248static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
f0706e82
JB		 3249{
3250 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3251 struct sta_info *sta, *tmp;
be8755e1 3252 LIST_HEAD(tmp_list);
0795af57 3253 DECLARE_MAC_BUF(mac);
d0709a65 3254 unsigned long flags;
f0706e82 3255
d0709a65 3256 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3257 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3258 if (time_after(jiffies, sta->last_rx + exp_time)) {
f4ea83dd 3259#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3260 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3261 dev->name, print_mac(mac, sta->addr));
f4ea83dd 3262#endif
cb585bcc 3263 __sta_info_unlink(&sta);
d0709a65
JB		 3264 if (sta)
3265 list_add(&sta->list, &tmp_list);
f0706e82 3266 }
d0709a65 3267 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3268
d0709a65
JB		 3269 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3270 sta_info_destroy(sta);
f0706e82
JB		 3271}
3272
3273
3274static void ieee80211_sta_merge_ibss(struct net_device *dev,
3275 struct ieee80211_if_sta *ifsta)
3276{
3277 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3278
f709fc69 3279 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
f0706e82
JB		 3280 if (ieee80211_sta_active_ibss(dev))
3281 return;
3282
3283 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3284 "IBSS networks with same SSID (merge)\n", dev->name);
3285 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3286}
3287
3288
f709fc69
LCC		 3289#ifdef CONFIG_MAC80211_MESH
3290static void ieee80211_mesh_housekeeping(struct net_device *dev,
3291 struct ieee80211_if_sta *ifsta)
3292{
3293 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3294 bool free_plinks;
3295
3296 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3297 mesh_path_expire(dev);
3298
3299 free_plinks = mesh_plink_availables(sdata);
3300 if (free_plinks != sdata->u.sta.accepting_plinks)
9d139c81 3301 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3302
3303 mod_timer(&ifsta->timer, jiffies +
3304 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3305}
3306
3307
3308void ieee80211_start_mesh(struct net_device *dev)
3309{
3310 struct ieee80211_if_sta *ifsta;
3311 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3312 ifsta = &sdata->u.sta;
3313 ifsta->state = IEEE80211_MESH_UP;
3314 ieee80211_sta_timer((unsigned long)sdata);
56a6d13d 3315 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3316}
3317#endif
3318
3319
f0706e82
JB		 3320void ieee80211_sta_timer(unsigned long data)
3321{
3322 struct ieee80211_sub_if_data *sdata =
3323 (struct ieee80211_sub_if_data *) data;
3324 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3325 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3326
3327 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3328 queue_work(local->hw.workqueue, &ifsta->work);
3329}
3330
f0706e82
JB		 3331void ieee80211_sta_work(struct work_struct *work)
3332{
3333 struct ieee80211_sub_if_data *sdata =
3334 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3335 struct net_device *dev = sdata->dev;
3336 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3337 struct ieee80211_if_sta *ifsta;
3338 struct sk_buff *skb;
3339
3340 if (!netif_running(dev))
3341 return;
3342
ece8eddd 3343 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3344 return;
3345
f4ea83dd
JB		 3346 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3347 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3348 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
f0706e82 3349 return;
f0706e82
JB		 3350 ifsta = &sdata->u.sta;
3351
3352 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3353 ieee80211_sta_rx_queued_mgmt(dev, skb);
3354
f709fc69 3355#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3356 if (ifsta->preq_queue_len &&
3357 time_after(jiffies,
3358 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f709fc69
LCC		 3359 mesh_path_start_discovery(dev);
3360#endif
3361
f0706e82
JB		 3362 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3363 ifsta->state != IEEE80211_ASSOCIATE &&
3364 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 3365 if (ifsta->scan_ssid_len)
3366 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3367 else
3368 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 3369 return;
3370 }
3371
3372 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3373 if (ieee80211_sta_config_auth(dev, ifsta))
3374 return;
3375 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3376 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3377 return;
3378
3379 switch (ifsta->state) {
3380 case IEEE80211_DISABLED:
3381 break;
3382 case IEEE80211_AUTHENTICATE:
3383 ieee80211_authenticate(dev, ifsta);
3384 break;
3385 case IEEE80211_ASSOCIATE:
3386 ieee80211_associate(dev, ifsta);
3387 break;
3388 case IEEE80211_ASSOCIATED:
3389 ieee80211_associated(dev, ifsta);
3390 break;
3391 case IEEE80211_IBSS_SEARCH:
3392 ieee80211_sta_find_ibss(dev, ifsta);
3393 break;
3394 case IEEE80211_IBSS_JOINED:
3395 ieee80211_sta_merge_ibss(dev, ifsta);
3396 break;
f709fc69
LCC		 3397#ifdef CONFIG_MAC80211_MESH
3398 case IEEE80211_MESH_UP:
3399 ieee80211_mesh_housekeeping(dev, ifsta);
3400 break;
3401#endif
f0706e82 3402 default:
f4ea83dd 3403 WARN_ON(1);
f0706e82
JB		 3404 break;
3405 }
3406
3407 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3408 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3409 "mixed-cell disabled - disassociate\n", dev->name);
3410
3411 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3412 ieee80211_set_disassoc(dev, ifsta, 0);
3413 }
3414}
3415
3416
3417static void ieee80211_sta_reset_auth(struct net_device *dev,
3418 struct ieee80211_if_sta *ifsta)
3419{
3420 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3421
3422 if (local->ops->reset_tsf) {
3423 /* Reset own TSF to allow time synchronization work. */
3424 local->ops->reset_tsf(local_to_hw(local));
3425 }
3426
3427 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3428
3429
3430 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3431 ifsta->auth_alg = WLAN_AUTH_OPEN;
3432 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3433 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3434 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3435 ifsta->auth_alg = WLAN_AUTH_LEAP;
3436 else
3437 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 3438 ifsta->auth_transaction = -1;
d6f2da5b
JS		 3439 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3440 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 3441 netif_carrier_off(dev);
3442}
3443
3444
3445void ieee80211_sta_req_auth(struct net_device *dev,
3446 struct ieee80211_if_sta *ifsta)
3447{
3448 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3449 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3450
51fb61e7 3451 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3452 return;
3453
d6f2da5b
JS		 3454 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3455 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3456 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3457 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3458 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3459 queue_work(local->hw.workqueue, &ifsta->work);
3460 }
3461}
3462
3463static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3464 const char *ssid, int ssid_len)
3465{
3466 int tmp, hidden_ssid;
3467
48225709
MW		 3468 if (ssid_len == ifsta->ssid_len &&
3469 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3470 return 1;
3471
d6f2da5b 3472 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3473 return 0;
3474
3475 hidden_ssid = 1;
3476 tmp = ssid_len;
3477 while (tmp--) {
3478 if (ssid[tmp] != '\0') {
3479 hidden_ssid = 0;
3480 break;
3481 }
3482 }
3483
3484 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3485 return 1;
3486
3487 if (ssid_len == 1 && ssid[0] == ' ')
3488 return 1;
3489
3490 return 0;
3491}
3492
3493static int ieee80211_sta_config_auth(struct net_device *dev,
3494 struct ieee80211_if_sta *ifsta)
3495{
3496 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3497 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3498 struct ieee80211_sta_bss *bss, *selected = NULL;
3499 int top_rssi = 0, freq;
3500
f0706e82 3501 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3502 freq = local->oper_channel->center_freq;
f0706e82
JB		 3503 list_for_each_entry(bss, &local->sta_bss_list, list) {
3504 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3505 continue;
3506
34a961f7
AK		 3507 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3508 IEEE80211_STA_AUTO_BSSID_SEL |
3509 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3510 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3511 !!sdata->default_key))
f0706e82
JB		 3512 continue;
3513
d6f2da5b
JS		 3514 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3515 bss->freq != freq)
f0706e82
JB		 3516 continue;
3517
d6f2da5b 3518 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3519 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3520 continue;
3521
d6f2da5b 3522 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3523 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3524 continue;
3525
566bfe5a 3526 if (!selected || top_rssi < bss->signal) {
f0706e82 3527 selected = bss;
566bfe5a 3528 top_rssi = bss->signal;
f0706e82
JB		 3529 }
3530 }
3531 if (selected)
3532 atomic_inc(&selected->users);
3533 spin_unlock_bh(&local->sta_bss_lock);
3534
3535 if (selected) {
be038b37 3536 ieee80211_set_freq(dev, selected->freq);
d6f2da5b 3537 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3538 ieee80211_sta_set_ssid(dev, selected->ssid,
3539 selected->ssid_len);
3540 ieee80211_sta_set_bssid(dev, selected->bssid);
e2839d8f 3541 ieee80211_sta_def_wmm_params(dev, selected, 0);
3e122be0 3542 ieee80211_rx_bss_put(local, selected);
f0706e82 3543 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3544 ieee80211_sta_reset_auth(dev, ifsta);
3545 return 0;
3546 } else {
3547 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3548 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3549 ieee80211_sta_start_scan(dev, NULL, 0);
3550 else
3551 ieee80211_sta_start_scan(dev, ifsta->ssid,
3552 ifsta->ssid_len);
f0706e82
JB		 3553 ifsta->state = IEEE80211_AUTHENTICATE;
3554 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3555 } else
3556 ifsta->state = IEEE80211_DISABLED;
3557 }
f0706e82
JB		 3558 return -1;
3559}
3560
f0706e82
JB		 3561
3562static int ieee80211_sta_create_ibss(struct net_device *dev,
3563 struct ieee80211_if_sta *ifsta)
3564{
3565 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3566 struct ieee80211_sta_bss *bss;
cffdd30d 3567 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3568 struct ieee80211_supported_band *sband;
f0706e82
JB		 3569 u8 bssid[ETH_ALEN], *pos;
3570 int i;
167ad6f7 3571 int ret;
0795af57 3572 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3573
3574#if 0
3575 /* Easier testing, use fixed BSSID. */
3576 memset(bssid, 0xfe, ETH_ALEN);
3577#else
3578 /* Generate random, not broadcast, locally administered BSSID. Mix in
3579 * own MAC address to make sure that devices that do not have proper
3580 * random number generator get different BSSID. */
3581 get_random_bytes(bssid, ETH_ALEN);
3582 for (i = 0; i < ETH_ALEN; i++)
3583 bssid[i] ^= dev->dev_addr[i];
3584 bssid[0] &= ~0x01;
3585 bssid[0] |= 0x02;
3586#endif
3587
0795af57
JP		 3588 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3589 dev->name, print_mac(mac, bssid));
f0706e82 3590
8318d78a
JB		 3591 bss = ieee80211_rx_bss_add(dev, bssid,
3592 local->hw.conf.channel->center_freq,
cffdd30d 3593 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3594 if (!bss)
3595 return -ENOMEM;
3596
8318d78a
JB		 3597 bss->band = local->hw.conf.channel->band;
3598 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3599
3600 if (local->hw.conf.beacon_int == 0)
dc0ae30c 3601 local->hw.conf.beacon_int = 100;
f0706e82 3602 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3603 bss->last_update = jiffies;
3604 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 3605
3606 if (sdata->default_key)
f0706e82 3607 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 3608 else
f0706e82 3609 sdata->drop_unencrypted = 0;
988c0f72 3610
8318d78a 3611 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3612 pos = bss->supp_rates;
8318d78a
JB		 3613 for (i = 0; i < sband->n_bitrates; i++) {
3614 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3615 *pos++ = (u8) (rate / 5);
3616 }
3617
167ad6f7 3618 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3e122be0 3619 ieee80211_rx_bss_put(local, bss);
167ad6f7 3620 return ret;
f0706e82
JB		 3621}
3622
3623
3624static int ieee80211_sta_find_ibss(struct net_device *dev,
3625 struct ieee80211_if_sta *ifsta)
3626{
3627 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3628 struct ieee80211_sta_bss *bss;
3629 int found = 0;
3630 u8 bssid[ETH_ALEN];
3631 int active_ibss;
0795af57
JP		 3632 DECLARE_MAC_BUF(mac);
3633 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3634
3635 if (ifsta->ssid_len == 0)
3636 return -EINVAL;
3637
3638 active_ibss = ieee80211_sta_active_ibss(dev);
3639#ifdef CONFIG_MAC80211_IBSS_DEBUG
3640 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3641 dev->name, active_ibss);
3642#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3643 spin_lock_bh(&local->sta_bss_lock);
3644 list_for_each_entry(bss, &local->sta_bss_list, list) {
3645 if (ifsta->ssid_len != bss->ssid_len ||
3646 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3647 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3648 continue;
3649#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3650 printk(KERN_DEBUG " bssid=%s found\n",
3651 print_mac(mac, bss->bssid));
f0706e82
JB		 3652#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3653 memcpy(bssid, bss->bssid, ETH_ALEN);
3654 found = 1;
3655 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3656 break;
3657 }
3658 spin_unlock_bh(&local->sta_bss_lock);
3659
3660#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 3661 if (found)
3662 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3663 "%s\n", print_mac(mac, bssid),
3664 print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3665#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3666 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3667 (bss = ieee80211_rx_bss_get(dev, bssid,
3668 local->hw.conf.channel->center_freq,
cffdd30d 3669 ifsta->ssid, ifsta->ssid_len))) {
167ad6f7 3670 int ret;
0795af57 3671 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3672 " based on configured SSID\n",
0795af57 3673 dev->name, print_mac(mac, bssid));
167ad6f7 3674 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3e122be0 3675 ieee80211_rx_bss_put(local, bss);
167ad6f7 3676 return ret;
f0706e82
JB		 3677 }
3678#ifdef CONFIG_MAC80211_IBSS_DEBUG
3679 printk(KERN_DEBUG " did not try to join ibss\n");
3680#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3681
3682 /* Selected IBSS not found in current scan results - try to scan */
3683 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3684 !ieee80211_sta_active_ibss(dev)) {
3685 mod_timer(&ifsta->timer, jiffies +
3686 IEEE80211_IBSS_MERGE_INTERVAL);
3687 } else if (time_after(jiffies, local->last_scan_completed +
3688 IEEE80211_SCAN_INTERVAL)) {
3689 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3690 "join\n", dev->name);
3691 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3692 ifsta->ssid_len);
3693 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3694 int interval = IEEE80211_SCAN_INTERVAL;
3695
3696 if (time_after(jiffies, ifsta->ibss_join_req +
3697 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3698 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3699 (!(local->oper_channel->flags &
3700 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3701 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3702 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3703 printk(KERN_DEBUG "%s: IBSS not allowed on"
3704 " %d MHz\n", dev->name,
3705 local->hw.conf.channel->center_freq);
f0706e82
JB		 3706 }
3707
3708 /* No IBSS found - decrease scan interval and continue
3709 * scanning. */
3710 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3711 }
3712
3713 ifsta->state = IEEE80211_IBSS_SEARCH;
3714 mod_timer(&ifsta->timer, jiffies + interval);
3715 return 0;
3716 }
3717
3718 return 0;
3719}
3720
3721
3722int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3723{
8318d78a 3724 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3725 struct ieee80211_if_sta *ifsta;
9d139c81 3726 int res;
f0706e82
JB		 3727
3728 if (len > IEEE80211_MAX_SSID_LEN)
3729 return -EINVAL;
3730
f0706e82
JB		 3731 ifsta = &sdata->u.sta;
3732
9d139c81
JB		 3733 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3734 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3735 memcpy(ifsta->ssid, ssid, len);
3736 ifsta->ssid_len = len;
d6f2da5b 3737 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 3738
3739 res = 0;
3740 /*
3741 * Hack! MLME code needs to be cleaned up to have different
3742 * entry points for configuration and internal selection change
3743 */
3744 if (netif_running(sdata->dev))
3745 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3746 if (res) {
3747 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3748 "the low-level driver\n", dev->name);
3749 return res;
3750 }
3751 }
f0706e82 3752
d6f2da5b
JS		 3753 if (len)
3754 ifsta->flags |= IEEE80211_STA_SSID_SET;
3755 else
3756 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 3757
51fb61e7 3758 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3759 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3760 ifsta->ibss_join_req = jiffies;
3761 ifsta->state = IEEE80211_IBSS_SEARCH;
3762 return ieee80211_sta_find_ibss(dev, ifsta);
3763 }
9d139c81 3764
f0706e82
JB		 3765 return 0;
3766}
3767
3768
3769int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3770{
3771 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3772 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3773 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3774 *len = ifsta->ssid_len;
3775 return 0;
3776}
3777
3778
3779int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3780{
3781 struct ieee80211_sub_if_data *sdata;
3782 struct ieee80211_if_sta *ifsta;
3783 int res;
3784
3785 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3786 ifsta = &sdata->u.sta;
3787
3788 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3789 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 3790 res = 0;
3791 /*
3792 * Hack! See also ieee80211_sta_set_ssid.
3793 */
3794 if (netif_running(sdata->dev))
3795 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 3796 if (res) {
3797 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3798 "the low-level driver\n", dev->name);
3799 return res;
3800 }
3801 }
3802
d6f2da5b
JS		 3803 if (is_valid_ether_addr(bssid))
3804 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3805 else
d6f2da5b
JS		 3806 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3807
f0706e82
JB		 3808 return 0;
3809}
3810
3811
3812static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3813 struct ieee80211_sub_if_data *sdata,
3814 int powersave)
3815{
3816 struct sk_buff *skb;
3817 struct ieee80211_hdr *nullfunc;
4e3996fe 3818 __le16 fc;
f0706e82
JB		 3819
3820 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3821 if (!skb) {
3822 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3823 "frame\n", sdata->dev->name);
3824 return;
3825 }
3826 skb_reserve(skb, local->hw.extra_tx_headroom);
3827
3828 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3829 memset(nullfunc, 0, 24);
4e3996fe
HH		 3830 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3831 IEEE80211_FCTL_TODS);
f0706e82 3832 if (powersave)
4e3996fe
HH		 3833 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3834 nullfunc->frame_control = fc;
f0706e82
JB		 3835 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3836 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3837 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3838
3839 ieee80211_sta_tx(sdata->dev, skb, 0);
3840}
3841
3842
69d3b6f4
JB		 3843static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3844{
3845 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3846 ieee80211_vif_is_mesh(&sdata->vif))
3847 ieee80211_sta_timer((unsigned long)sdata);
3848}
3849
f0706e82
JB		 3850void ieee80211_scan_completed(struct ieee80211_hw *hw)
3851{
3852 struct ieee80211_local *local = hw_to_local(hw);
3853 struct net_device *dev = local->scan_dev;
3854 struct ieee80211_sub_if_data *sdata;
3855 union iwreq_data wrqu;
3856
3857 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3858 memset(&wrqu, 0, sizeof(wrqu));
3859 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3860
ece8eddd
ZY		 3861 if (local->sta_hw_scanning) {
3862 local->sta_hw_scanning = 0;
675ef586
MA		 3863 if (ieee80211_hw_config(local))
3864 printk(KERN_DEBUG "%s: failed to restore operational "
3865 "channel after scan\n", dev->name);
69d3b6f4
JB		 3866 /* Restart STA timer for HW scan case */
3867 rcu_read_lock();
3868 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3869 ieee80211_restart_sta_timer(sdata);
3870 rcu_read_unlock();
3871
ece8eddd
ZY		 3872 goto done;
3873 }
3874
3875 local->sta_sw_scanning = 0;
f0706e82 3876 if (ieee80211_hw_config(local))
4b50e388 3877 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3878 "channel after scan\n", dev->name);
3879
4150c572
JB		 3880
3881 netif_tx_lock_bh(local->mdev);
e308a5d8 3882 netif_addr_lock(local->mdev);
4150c572
JB		 3883 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3884 local->ops->configure_filter(local_to_hw(local),
3885 FIF_BCN_PRBRESP_PROMISC,
3886 &local->filter_flags,
3887 local->mdev->mc_count,
3888 local->mdev->mc_list);
3889
e308a5d8 3890 netif_addr_unlock(local->mdev);
4150c572 3891 netif_tx_unlock_bh(local->mdev);
f0706e82 3892
79010420
JB		 3893 rcu_read_lock();
3894 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
69d3b6f4
JB		 3895 /* Tell AP we're back */
3896 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3897 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3898 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3899
69d3b6f4 3900 ieee80211_restart_sta_timer(sdata);
f709fc69 3901
f0706e82
JB		 3902 netif_wake_queue(sdata->dev);
3903 }
79010420 3904 rcu_read_unlock();
f0706e82 3905
ece8eddd 3906done:
f0706e82 3907 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3908 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3909 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3910 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3911 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3912 !ieee80211_sta_active_ibss(dev)))
3913 ieee80211_sta_find_ibss(dev, ifsta);
3914 }
3915}
3916EXPORT_SYMBOL(ieee80211_scan_completed);
3917
3918void ieee80211_sta_scan_work(struct work_struct *work)
3919{
3920 struct ieee80211_local *local =
3921 container_of(work, struct ieee80211_local, scan_work.work);
3922 struct net_device *dev = local->scan_dev;
3923 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3924 struct ieee80211_supported_band *sband;
f0706e82
JB		 3925 struct ieee80211_channel *chan;
3926 int skip;
3927 unsigned long next_delay = 0;
3928
ece8eddd 3929 if (!local->sta_sw_scanning)
f0706e82
JB		 3930 return;
3931
3932 switch (local->scan_state) {
3933 case SCAN_SET_CHANNEL:
69d464d5
JB		 3934 /*
3935 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3936 * after we successfully scanned the last channel of the last
3937 * band (and the last band is supported by the hw)
3938 */
8318d78a
JB		 3939 if (local->scan_band < IEEE80211_NUM_BANDS)
3940 sband = local->hw.wiphy->bands[local->scan_band];
3941 else
3942 sband = NULL;
3943
69d464d5
JB		 3944 /*
3945 * If we are at an unsupported band and have more bands
3946 * left to scan, advance to the next supported one.
3947 */
3948 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3949 local->scan_band++;
3950 sband = local->hw.wiphy->bands[local->scan_band];
3951 local->scan_channel_idx = 0;
3952 }
3953
69d464d5
JB		 3954 /* if no more bands/channels left, complete scan */
3955 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3956 ieee80211_scan_completed(local_to_hw(local));
3957 return;
3958 }
8318d78a
JB		 3959 skip = 0;
3960 chan = &sband->channels[local->scan_channel_idx];
3961
3962 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3963 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3964 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3965 skip = 1;
3966
3967 if (!skip) {
f0706e82
JB		 3968 local->scan_channel = chan;
3969 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3970 printk(KERN_DEBUG "%s: failed to set freq to "
3971 "%d MHz for scan\n", dev->name,
3972 chan->center_freq);
f0706e82
JB		 3973 skip = 1;
3974 }
3975 }
3976
69d464d5 3977 /* advance state machine to next channel/band */
f0706e82 3978 local->scan_channel_idx++;
8318d78a 3979 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3980 /*
3981 * scan_band may end up == IEEE80211_NUM_BANDS, but
3982 * we'll catch that case above and complete the scan
3983 * if that is the case.
3984 */
8318d78a
JB		 3985 local->scan_band++;
3986 local->scan_channel_idx = 0;
f0706e82
JB		 3987 }
3988
3989 if (skip)
3990 break;
3991
3992 next_delay = IEEE80211_PROBE_DELAY +
3993 usecs_to_jiffies(local->hw.channel_change_time);
3994 local->scan_state = SCAN_SEND_PROBE;
3995 break;
3996 case SCAN_SEND_PROBE:
8318d78a 3997 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3998 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3999
4000 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4001 break;
4002 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4003 local->scan_ssid_len);
4004 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 4005 break;
4006 }
4007
ece8eddd 4008 if (local->sta_sw_scanning)
f0706e82
JB		 4009 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4010 next_delay);
4011}
4012
4013
4014static int ieee80211_sta_start_scan(struct net_device *dev,
4015 u8 *ssid, size_t ssid_len)
4016{
4017 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4018 struct ieee80211_sub_if_data *sdata;
4019
4020 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4021 return -EINVAL;
4022
4023 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4024 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4025 * BSSID: MACAddress
4026 * SSID
4027 * ScanType: ACTIVE, PASSIVE
4028 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4029 * a Probe frame during active scanning
4030 * ChannelList
4031 * MinChannelTime (>= ProbeDelay), in TU
4032 * MaxChannelTime: (>= MinChannelTime), in TU
4033 */
4034
4035 /* MLME-SCAN.confirm
4036 * BSSDescriptionSet
4037 * ResultCode: SUCCESS, INVALID_PARAMETERS
4038 */
4039
ece8eddd 4040 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 4041 if (local->scan_dev == dev)
4042 return 0;
4043 return -EBUSY;
4044 }
4045
4046 if (local->ops->hw_scan) {
4047 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 4048 ssid, ssid_len);
f0706e82 4049 if (!rc) {
ece8eddd 4050 local->sta_hw_scanning = 1;
f0706e82
JB		 4051 local->scan_dev = dev;
4052 }
4053 return rc;
4054 }
4055
ece8eddd 4056 local->sta_sw_scanning = 1;
f0706e82 4057
79010420
JB		 4058 rcu_read_lock();
4059 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
f0706e82 4060 netif_stop_queue(sdata->dev);
51fb61e7 4061 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 4062 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4063 ieee80211_send_nullfunc(local, sdata, 1);
4064 }
79010420 4065 rcu_read_unlock();
f0706e82
JB		 4066
4067 if (ssid) {
4068 local->scan_ssid_len = ssid_len;
4069 memcpy(local->scan_ssid, ssid, ssid_len);
4070 } else
4071 local->scan_ssid_len = 0;
4072 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 4073 local->scan_channel_idx = 0;
8318d78a 4074 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 4075 local->scan_dev = dev;
4076
b9e40857 4077 netif_addr_lock_bh(local->mdev);
4150c572
JB		 4078 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4079 local->ops->configure_filter(local_to_hw(local),
4080 FIF_BCN_PRBRESP_PROMISC,
4081 &local->filter_flags,
4082 local->mdev->mc_count,
4083 local->mdev->mc_list);
b9e40857 4084 netif_addr_unlock_bh(local->mdev);
f0706e82
JB		 4085
4086 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4087 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4088 IEEE80211_CHANNEL_TIME);
4089
4090 return 0;
4091}
4092
4093
4094int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4095{
4096 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4097 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4098 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4099
51fb61e7 4100 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4101 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4102
ece8eddd 4103 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 4104 if (local->scan_dev == dev)
4105 return 0;
4106 return -EBUSY;
4107 }
4108
a0af5f14
HS		 4109 ifsta->scan_ssid_len = ssid_len;
4110 if (ssid_len)
4111 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 4112 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4113 queue_work(local->hw.workqueue, &ifsta->work);
4114 return 0;
4115}
4116
4117static char *
4118ieee80211_sta_scan_result(struct net_device *dev,
ccc58057 4119 struct iw_request_info *info,
f0706e82
JB		 4120 struct ieee80211_sta_bss *bss,
4121 char *current_ev, char *end_buf)
4122{
4123 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4124 struct iw_event iwe;
4125
4126 if (time_after(jiffies,
4127 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4128 return current_ev;
4129
f0706e82
JB		 4130 memset(&iwe, 0, sizeof(iwe));
4131 iwe.cmd = SIOCGIWAP;
4132 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4133 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
ccc58057 4134 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82
JB		 4135 IW_EV_ADDR_LEN);
4136
4137 memset(&iwe, 0, sizeof(iwe));
4138 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 4139 if (bss_mesh_cfg(bss)) {
4140 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69 4141 iwe.u.data.flags = 1;
ccc58057
DM		 4142 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4143 &iwe, bss_mesh_id(bss));
f709fc69
LCC		 4144 } else {
4145 iwe.u.data.length = bss->ssid_len;
4146 iwe.u.data.flags = 1;
ccc58057
DM		 4147 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4148 &iwe, bss->ssid);
f709fc69 4149 }
f0706e82 4150
1d1b5359
LCC		 4151 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4152 || bss_mesh_cfg(bss)) {
f0706e82
JB		 4153 memset(&iwe, 0, sizeof(iwe));
4154 iwe.cmd = SIOCGIWMODE;
902acc78 4155 if (bss_mesh_cfg(bss))
f709fc69
LCC		 4156 iwe.u.mode = IW_MODE_MESH;
4157 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 4158 iwe.u.mode = IW_MODE_MASTER;
4159 else
4160 iwe.u.mode = IW_MODE_ADHOC;
ccc58057
DM		 4161 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4162 &iwe, IW_EV_UINT_LEN);
f0706e82
JB		 4163 }
4164
4165 memset(&iwe, 0, sizeof(iwe));
4166 iwe.cmd = SIOCGIWFREQ;
9381be05
TW		 4167 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4168 iwe.u.freq.e = 0;
ccc58057 4169 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82 4170 IW_EV_FREQ_LEN);
8318d78a
JB		 4171
4172 memset(&iwe, 0, sizeof(iwe));
4173 iwe.cmd = SIOCGIWFREQ;
9381be05
TW		 4174 iwe.u.freq.m = bss->freq;
4175 iwe.u.freq.e = 6;
ccc58057 4176 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82 4177 IW_EV_FREQ_LEN);
f0706e82
JB		 4178 memset(&iwe, 0, sizeof(iwe));
4179 iwe.cmd = IWEVQUAL;
566bfe5a
BR		 4180 iwe.u.qual.qual = bss->qual;
4181 iwe.u.qual.level = bss->signal;
f0706e82
JB		 4182 iwe.u.qual.noise = bss->noise;
4183 iwe.u.qual.updated = local->wstats_flags;
ccc58057 4184 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
f0706e82
JB		 4185 IW_EV_QUAL_LEN);
4186
4187 memset(&iwe, 0, sizeof(iwe));
4188 iwe.cmd = SIOCGIWENCODE;
4189 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4190 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4191 else
4192 iwe.u.data.flags = IW_ENCODE_DISABLED;
4193 iwe.u.data.length = 0;
ccc58057
DM		 4194 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4195 &iwe, "");
f0706e82
JB		 4196
4197 if (bss && bss->wpa_ie) {
4198 memset(&iwe, 0, sizeof(iwe));
4199 iwe.cmd = IWEVGENIE;
4200 iwe.u.data.length = bss->wpa_ie_len;
ccc58057
DM		 4201 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4202 &iwe, bss->wpa_ie);
f0706e82
JB		 4203 }
4204
4205 if (bss && bss->rsn_ie) {
4206 memset(&iwe, 0, sizeof(iwe));
4207 iwe.cmd = IWEVGENIE;
4208 iwe.u.data.length = bss->rsn_ie_len;
ccc58057
DM		 4209 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4210 &iwe, bss->rsn_ie);
f0706e82
JB		 4211 }
4212
e623157b
EG		 4213 if (bss && bss->ht_ie) {
4214 memset(&iwe, 0, sizeof(iwe));
4215 iwe.cmd = IWEVGENIE;
4216 iwe.u.data.length = bss->ht_ie_len;
ccc58057
DM		 4217 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4218 &iwe, bss->ht_ie);
e623157b
EG		 4219 }
4220
f0706e82
JB		 4221 if (bss && bss->supp_rates_len > 0) {
4222 /* display all supported rates in readable format */
ccc58057 4223 char *p = current_ev + iwe_stream_lcp_len(info);
f0706e82
JB		 4224 int i;
4225
4226 memset(&iwe, 0, sizeof(iwe));
4227 iwe.cmd = SIOCGIWRATE;
4228 /* Those two flags are ignored... */
4229 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4230
4231 for (i = 0; i < bss->supp_rates_len; i++) {
4232 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4233 0x7f) * 500000);
ccc58057 4234 p = iwe_stream_add_value(info, current_ev, p,
f0706e82
JB		 4235 end_buf, &iwe, IW_EV_PARAM_LEN);
4236 }
4237 current_ev = p;
4238 }
4239
4240 if (bss) {
4241 char *buf;
4242 buf = kmalloc(30, GFP_ATOMIC);
4243 if (buf) {
4244 memset(&iwe, 0, sizeof(iwe));
4245 iwe.cmd = IWEVCUSTOM;
4246 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4247 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4248 current_ev = iwe_stream_add_point(info, current_ev,
4249 end_buf,
f0706e82 4250 &iwe, buf);
bf998f68
EG		 4251 memset(&iwe, 0, sizeof(iwe));
4252 iwe.cmd = IWEVCUSTOM;
4253 sprintf(buf, " Last beacon: %dms ago",
4254 jiffies_to_msecs(jiffies - bss->last_update));
4255 iwe.u.data.length = strlen(buf);
4256 current_ev = iwe_stream_add_point(info, current_ev,
4257 end_buf, &iwe, buf);
f0706e82
JB		 4258 kfree(buf);
4259 }
4260 }
4261
902acc78 4262 if (bss_mesh_cfg(bss)) {
f709fc69 4263 char *buf;
24736701 4264 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 4265 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 4266 if (buf) {
4267 memset(&iwe, 0, sizeof(iwe));
4268 iwe.cmd = IWEVCUSTOM;
24736701 4269 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4f5d4c4d 4270 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4271 current_ev = iwe_stream_add_point(info, current_ev,
4272 end_buf,
4f5d4c4d
LCC		 4273 &iwe, buf);
4274 sprintf(buf, "Path Selection Protocol ID: "
24736701
JL		 4275 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4276 cfg[4]);
4f5d4c4d 4277 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4278 current_ev = iwe_stream_add_point(info, current_ev,
4279 end_buf,
4f5d4c4d
LCC		 4280 &iwe, buf);
4281 sprintf(buf, "Path Selection Metric ID: "
24736701
JL		 4282 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4283 cfg[8]);
4f5d4c4d 4284 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4285 current_ev = iwe_stream_add_point(info, current_ev,
4286 end_buf,
4f5d4c4d
LCC		 4287 &iwe, buf);
4288 sprintf(buf, "Congestion Control Mode ID: "
24736701
JL		 4289 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4290 cfg[11], cfg[12]);
4f5d4c4d 4291 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4292 current_ev = iwe_stream_add_point(info, current_ev,
4293 end_buf,
4f5d4c4d
LCC		 4294 &iwe, buf);
4295 sprintf(buf, "Channel Precedence: "
24736701
JL		 4296 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4297 cfg[15], cfg[16]);
f709fc69 4298 iwe.u.data.length = strlen(buf);
ccc58057
DM		 4299 current_ev = iwe_stream_add_point(info, current_ev,
4300 end_buf,
f709fc69
LCC		 4301 &iwe, buf);
4302 kfree(buf);
4303 }
4304 }
4305
f0706e82
JB		 4306 return current_ev;
4307}
4308
4309
ccc58057
DM		 4310int ieee80211_sta_scan_results(struct net_device *dev,
4311 struct iw_request_info *info,
4312 char *buf, size_t len)
f0706e82
JB		 4313{
4314 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4315 char *current_ev = buf;
4316 char *end_buf = buf + len;
4317 struct ieee80211_sta_bss *bss;
4318
4319 spin_lock_bh(&local->sta_bss_lock);
4320 list_for_each_entry(bss, &local->sta_bss_list, list) {
4321 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4322 spin_unlock_bh(&local->sta_bss_lock);
4323 return -E2BIG;
4324 }
ccc58057
DM		 4325 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4326 current_ev, end_buf);
f0706e82
JB		 4327 }
4328 spin_unlock_bh(&local->sta_bss_lock);
4329 return current_ev - buf;
4330}
4331
4332
4333int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4334{
4335 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4336 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 4337
f0706e82
JB		 4338 kfree(ifsta->extra_ie);
4339 if (len == 0) {
4340 ifsta->extra_ie = NULL;
4341 ifsta->extra_ie_len = 0;
4342 return 0;
4343 }
4344 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4345 if (!ifsta->extra_ie) {
4346 ifsta->extra_ie_len = 0;
4347 return -ENOMEM;
4348 }
4349 memcpy(ifsta->extra_ie, ie, len);
4350 ifsta->extra_ie_len = len;
4351 return 0;
4352}
4353
4354
988c0f72
JB		 4355struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4356 struct sk_buff *skb, u8 *bssid,
87291c02 4357 u8 *addr, u64 supp_rates)
f0706e82
JB		 4358{
4359 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4360 struct sta_info *sta;
91fa558b 4361 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 4362 DECLARE_MAC_BUF(mac);
87291c02 4363 int band = local->hw.conf.channel->band;
f0706e82
JB		 4364
4365 /* TODO: Could consider removing the least recently used entry and
4366 * allow new one to be added. */
4367 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4368 if (net_ratelimit()) {
4369 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 4370 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 4371 }
4372 return NULL;
4373 }
4374
1e188637 4375 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 4376 return NULL;
4377
f4ea83dd 4378#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 4379 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 4380 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f4ea83dd 4381#endif
f0706e82 4382
73651ee6
JB		 4383 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4384 if (!sta)
f0706e82
JB		 4385 return NULL;
4386
07346f81 4387 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 4388
87291c02
VK		 4389 if (supp_rates)
4390 sta->supp_rates[band] = supp_rates;
4391 else
4392 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
f0706e82
JB		 4393
4394 rate_control_rate_init(sta, local);
4395
93e5deb1 4396 if (sta_info_insert(sta))
73651ee6 4397 return NULL;
73651ee6 4398
d0709a65 4399 return sta;
f0706e82
JB		 4400}
4401
4402
4403int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4404{
4405 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4406 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4407
f4ea83dd 4408 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f0706e82
JB		 4409 dev->name, reason);
4410
51fb61e7
JB		 4411 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4412 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4413 return -EINVAL;
4414
4415 ieee80211_send_deauth(dev, ifsta, reason);
4416 ieee80211_set_disassoc(dev, ifsta, 1);
4417 return 0;
4418}
4419
4420
4421int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4422{
4423 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4424 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4425
f4ea83dd 4426 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f0706e82
JB		 4427 dev->name, reason);
4428
51fb61e7 4429 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4430 return -EINVAL;
4431
d6f2da5b 4432 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4433 return -1;
4434
4435 ieee80211_send_disassoc(dev, ifsta, reason);
4436 ieee80211_set_disassoc(dev, ifsta, 0);
4437 return 0;
4438}
84363e6e
MA		 4439
4440void ieee80211_notify_mac(struct ieee80211_hw *hw,
4441 enum ieee80211_notification_types notif_type)
4442{
4443 struct ieee80211_local *local = hw_to_local(hw);
4444 struct ieee80211_sub_if_data *sdata;
4445
4446 switch (notif_type) {
4447 case IEEE80211_NOTIFY_RE_ASSOC:
4448 rcu_read_lock();
4449 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 4450 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4451 continue;
84363e6e 4452
3e122be0 4453 ieee80211_sta_req_auth(sdata->dev, &sdata->u.sta);
84363e6e
MA		 4454 }
4455 rcu_read_unlock();
4456 break;
4457 }
4458}
4459EXPORT_SYMBOL(ieee80211_notify_mac);
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