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mac80211: adding 802.11n IEs handling
[linux-block.git] / net / mac80211 / ieee80211_sta.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>
f0706e82
JB		 27#include <net/iw_handler.h>
28#include <asm/types.h>
f0706e82
JB		 29
30#include <net/mac80211.h>
31#include "ieee80211_i.h"
32#include "ieee80211_rate.h"
47f0c502 33#include "ieee80211_led.h"
f0706e82
JB		 34
35#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_MAX_TRIES 3
39#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
40#define IEEE80211_PROBE_INTERVAL (60 * HZ)
41#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
42#define IEEE80211_SCAN_INTERVAL (2 * HZ)
43#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
44#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
45
46#define IEEE80211_PROBE_DELAY (HZ / 33)
47#define IEEE80211_CHANNEL_TIME (HZ / 33)
48#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
49#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
50#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
51#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
52
53#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
54
55
56#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
57
58#define ERP_INFO_USE_PROTECTION BIT(1)
59
60static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
61 u8 *ssid, size_t ssid_len);
62static struct ieee80211_sta_bss *
cffdd30d
JL		 63ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
64 u8 *ssid, u8 ssid_len);
f0706e82
JB		 65static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69static int ieee80211_sta_wep_configured(struct net_device *dev);
70static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76/* Parsed Information Elements */
77struct ieee802_11_elems {
5558235c 78 /* pointers to IEs */
f0706e82 79 u8 *ssid;
f0706e82 80 u8 *supp_rates;
f0706e82 81 u8 *fh_params;
f0706e82 82 u8 *ds_params;
f0706e82 83 u8 *cf_params;
f0706e82 84 u8 *tim;
f0706e82 85 u8 *ibss_params;
f0706e82 86 u8 *challenge;
f0706e82 87 u8 *wpa;
f0706e82 88 u8 *rsn;
f0706e82 89 u8 *erp_info;
f0706e82 90 u8 *ext_supp_rates;
f0706e82 91 u8 *wmm_info;
f0706e82 92 u8 *wmm_param;
c7153508
RR		 93 u8 *ht_cap_elem;
94 u8 *ht_info_elem;
5558235c
JB		 95 /* length of them, respectively */
96 u8 ssid_len;
97 u8 supp_rates_len;
98 u8 fh_params_len;
99 u8 ds_params_len;
100 u8 cf_params_len;
101 u8 tim_len;
102 u8 ibss_params_len;
103 u8 challenge_len;
104 u8 wpa_len;
105 u8 rsn_len;
106 u8 erp_info_len;
107 u8 ext_supp_rates_len;
108 u8 wmm_info_len;
f0706e82 109 u8 wmm_param_len;
c7153508
RR		 110 u8 ht_cap_elem_len;
111 u8 ht_info_elem_len;
f0706e82
JB		 112};
113
67a4cce4
JL		 114static void ieee802_11_parse_elems(u8 *start, size_t len,
115 struct ieee802_11_elems *elems)
f0706e82
JB		 116{
117 size_t left = len;
118 u8 *pos = start;
f0706e82
JB		 119
120 memset(elems, 0, sizeof(*elems));
121
122 while (left >= 2) {
123 u8 id, elen;
124
125 id = *pos++;
126 elen = *pos++;
127 left -= 2;
128
67a4cce4
JL		 129 if (elen > left)
130 return;
f0706e82
JB		 131
132 switch (id) {
133 case WLAN_EID_SSID:
134 elems->ssid = pos;
135 elems->ssid_len = elen;
136 break;
137 case WLAN_EID_SUPP_RATES:
138 elems->supp_rates = pos;
139 elems->supp_rates_len = elen;
140 break;
141 case WLAN_EID_FH_PARAMS:
142 elems->fh_params = pos;
143 elems->fh_params_len = elen;
144 break;
145 case WLAN_EID_DS_PARAMS:
146 elems->ds_params = pos;
147 elems->ds_params_len = elen;
148 break;
149 case WLAN_EID_CF_PARAMS:
150 elems->cf_params = pos;
151 elems->cf_params_len = elen;
152 break;
153 case WLAN_EID_TIM:
154 elems->tim = pos;
155 elems->tim_len = elen;
156 break;
157 case WLAN_EID_IBSS_PARAMS:
158 elems->ibss_params = pos;
159 elems->ibss_params_len = elen;
160 break;
161 case WLAN_EID_CHALLENGE:
162 elems->challenge = pos;
163 elems->challenge_len = elen;
164 break;
165 case WLAN_EID_WPA:
166 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
167 pos[2] == 0xf2) {
168 /* Microsoft OUI (00:50:F2) */
169 if (pos[3] == 1) {
170 /* OUI Type 1 - WPA IE */
171 elems->wpa = pos;
172 elems->wpa_len = elen;
173 } else if (elen >= 5 && pos[3] == 2) {
174 if (pos[4] == 0) {
175 elems->wmm_info = pos;
176 elems->wmm_info_len = elen;
177 } else if (pos[4] == 1) {
178 elems->wmm_param = pos;
179 elems->wmm_param_len = elen;
180 }
181 }
182 }
183 break;
184 case WLAN_EID_RSN:
185 elems->rsn = pos;
186 elems->rsn_len = elen;
187 break;
188 case WLAN_EID_ERP_INFO:
189 elems->erp_info = pos;
190 elems->erp_info_len = elen;
191 break;
192 case WLAN_EID_EXT_SUPP_RATES:
193 elems->ext_supp_rates = pos;
194 elems->ext_supp_rates_len = elen;
195 break;
c7153508
RR		 196 case WLAN_EID_HT_CAPABILITY:
197 elems->ht_cap_elem = pos;
198 elems->ht_cap_elem_len = elen;
199 break;
200 case WLAN_EID_HT_EXTRA_INFO:
201 elems->ht_info_elem = pos;
202 elems->ht_info_elem_len = elen;
203 break;
f0706e82 204 default:
f0706e82
JB		 205 break;
206 }
207
208 left -= elen;
209 pos += elen;
210 }
f0706e82
JB		 211}
212
213
f0706e82
JB		 214static int ecw2cw(int ecw)
215{
216 int cw = 1;
217 while (ecw > 0) {
218 cw <<= 1;
219 ecw--;
220 }
221 return cw - 1;
222}
223
f0706e82
JB		 224static void ieee80211_sta_wmm_params(struct net_device *dev,
225 struct ieee80211_if_sta *ifsta,
226 u8 *wmm_param, size_t wmm_param_len)
227{
228 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
229 struct ieee80211_tx_queue_params params;
230 size_t left;
231 int count;
232 u8 *pos;
233
234 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
235 return;
236 count = wmm_param[6] & 0x0f;
237 if (count == ifsta->wmm_last_param_set)
238 return;
239 ifsta->wmm_last_param_set = count;
240
241 pos = wmm_param + 8;
242 left = wmm_param_len - 8;
243
244 memset(&params, 0, sizeof(params));
245
246 if (!local->ops->conf_tx)
247 return;
248
249 local->wmm_acm = 0;
250 for (; left >= 4; left -= 4, pos += 4) {
251 int aci = (pos[0] >> 5) & 0x03;
252 int acm = (pos[0] >> 4) & 0x01;
253 int queue;
254
255 switch (aci) {
256 case 1:
257 queue = IEEE80211_TX_QUEUE_DATA3;
258 if (acm) {
259 local->wmm_acm |= BIT(0) | BIT(3);
260 }
261 break;
262 case 2:
263 queue = IEEE80211_TX_QUEUE_DATA1;
264 if (acm) {
265 local->wmm_acm |= BIT(4) | BIT(5);
266 }
267 break;
268 case 3:
269 queue = IEEE80211_TX_QUEUE_DATA0;
270 if (acm) {
271 local->wmm_acm |= BIT(6) | BIT(7);
272 }
273 break;
274 case 0:
275 default:
276 queue = IEEE80211_TX_QUEUE_DATA2;
277 if (acm) {
278 local->wmm_acm |= BIT(1) | BIT(2);
279 }
280 break;
281 }
282
283 params.aifs = pos[0] & 0x0f;
284 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
285 params.cw_min = ecw2cw(pos[1] & 0x0f);
286 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
287 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
288 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
289 "cWmin=%d cWmax=%d burst=%d\n",
290 dev->name, queue, aci, acm, params.aifs, params.cw_min,
291 params.cw_max, params.burst_time);
292 /* TODO: handle ACM (block TX, fallback to next lowest allowed
293 * AC for now) */
294 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
295 printk(KERN_DEBUG "%s: failed to set TX queue "
296 "parameters for queue %d\n", dev->name, queue);
297 }
298 }
299}
300
301
5628221c
DD		 302static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
303{
5628221c
DD		 304 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
305 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
306 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 307 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 308 u8 changes = 0;
0795af57 309 DECLARE_MAC_BUF(mac);
5628221c 310
13262ffd 311 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
5628221c
DD		 312 if (net_ratelimit()) {
313 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 314 "%s)\n",
5628221c
DD		 315 dev->name,
316 use_protection ? "enabled" : "disabled",
0795af57 317 print_mac(mac, ifsta->bssid));
5628221c 318 }
13262ffd
JS		 319 if (use_protection)
320 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
321 else
322 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
d9430a32 323 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 324 }
7e9ed188 325
13262ffd 326 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
7e9ed188
DD		 327 if (net_ratelimit()) {
328 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 329 " (BSSID=%s)\n",
7e9ed188
DD		 330 dev->name,
331 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
332 "short" : "long",
0795af57 333 print_mac(mac, ifsta->bssid));
7e9ed188 334 }
13262ffd
JS		 335 if (preamble_mode)
336 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
337 else
338 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
d9430a32 339 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 340 }
d9430a32
DD		 341
342 if (changes)
343 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 344}
345
c7153508
RR		 346int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
347 struct ieee80211_ht_info *ht_info)
348{
349
350 if (ht_info == NULL)
351 return -EINVAL;
352
353 memset(ht_info, 0, sizeof(*ht_info));
354
355 if (ht_cap_ie) {
356 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
357
358 ht_info->ht_supported = 1;
359 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
360 ht_info->ampdu_factor =
361 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
362 ht_info->ampdu_density =
363 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
364 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
365 } else
366 ht_info->ht_supported = 0;
367
368 return 0;
369}
370
371int ieee80211_ht_addt_info_ie_to_ht_bss_info(
372 struct ieee80211_ht_addt_info *ht_add_info_ie,
373 struct ieee80211_ht_bss_info *bss_info)
374{
375 if (bss_info == NULL)
376 return -EINVAL;
377
378 memset(bss_info, 0, sizeof(*bss_info));
379
380 if (ht_add_info_ie) {
381 u16 op_mode;
382 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
383
384 bss_info->primary_channel = ht_add_info_ie->control_chan;
385 bss_info->bss_cap = ht_add_info_ie->ht_param;
386 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
387 }
388
389 return 0;
390}
5628221c 391
f0706e82
JB		 392static void ieee80211_sta_send_associnfo(struct net_device *dev,
393 struct ieee80211_if_sta *ifsta)
394{
395 char *buf;
396 size_t len;
397 int i;
398 union iwreq_data wrqu;
399
400 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
401 return;
402
403 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 404 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 405 if (!buf)
406 return;
407
408 len = sprintf(buf, "ASSOCINFO(");
409 if (ifsta->assocreq_ies) {
410 len += sprintf(buf + len, "ReqIEs=");
411 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
412 len += sprintf(buf + len, "%02x",
413 ifsta->assocreq_ies[i]);
414 }
415 }
416 if (ifsta->assocresp_ies) {
417 if (ifsta->assocreq_ies)
418 len += sprintf(buf + len, " ");
419 len += sprintf(buf + len, "RespIEs=");
420 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
421 len += sprintf(buf + len, "%02x",
422 ifsta->assocresp_ies[i]);
423 }
424 }
425 len += sprintf(buf + len, ")");
426
427 if (len > IW_CUSTOM_MAX) {
428 len = sprintf(buf, "ASSOCRESPIE=");
429 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
430 len += sprintf(buf + len, "%02x",
431 ifsta->assocresp_ies[i]);
432 }
433 }
434
435 memset(&wrqu, 0, sizeof(wrqu));
436 wrqu.data.length = len;
437 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
438
439 kfree(buf);
440}
441
442
443static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 444 struct ieee80211_if_sta *ifsta,
47f0c502 445 bool assoc)
f0706e82 446{
47f0c502 447 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 448 union iwreq_data wrqu;
449
d6f2da5b 450 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
f0706e82
JB		 451 return;
452
f0706e82
JB		 453 if (assoc) {
454 struct ieee80211_sub_if_data *sdata;
5628221c 455 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 456
457 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
458
f0706e82
JB		 459 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
460 if (sdata->type != IEEE80211_IF_TYPE_STA)
461 return;
5628221c 462
65c107ab 463 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 464 local->hw.conf.channel,
465 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 466 if (bss) {
467 if (bss->has_erp_value)
468 ieee80211_handle_erp_ie(dev, bss->erp_value);
469 ieee80211_rx_bss_put(dev, bss);
470 }
471
f0706e82 472 netif_carrier_on(dev);
d6f2da5b 473 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 474 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
475 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
476 ieee80211_sta_send_associnfo(dev, ifsta);
477 } else {
d6f2da5b
JS		 478 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
479
f0706e82 480 netif_carrier_off(dev);
d9430a32 481 ieee80211_reset_erp_info(dev);
f0706e82
JB		 482 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
483 }
484 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
485 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
486 ifsta->last_probe = jiffies;
47f0c502 487 ieee80211_led_assoc(local, assoc);
f0706e82
JB		 488}
489
490static void ieee80211_set_disassoc(struct net_device *dev,
491 struct ieee80211_if_sta *ifsta, int deauth)
492{
493 if (deauth)
494 ifsta->auth_tries = 0;
495 ifsta->assoc_tries = 0;
496 ieee80211_set_associated(dev, ifsta, 0);
497}
498
499static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
500 int encrypt)
501{
502 struct ieee80211_sub_if_data *sdata;
503 struct ieee80211_tx_packet_data *pkt_data;
504
505 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
506 skb->dev = sdata->local->mdev;
507 skb_set_mac_header(skb, 0);
508 skb_set_network_header(skb, 0);
509 skb_set_transport_header(skb, 0);
510
511 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
512 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
513 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 514 if (!encrypt)
515 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 516
517 dev_queue_xmit(skb);
518}
519
520
521static void ieee80211_send_auth(struct net_device *dev,
522 struct ieee80211_if_sta *ifsta,
523 int transaction, u8 *extra, size_t extra_len,
524 int encrypt)
525{
526 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
527 struct sk_buff *skb;
528 struct ieee80211_mgmt *mgmt;
529
530 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
531 sizeof(*mgmt) + 6 + extra_len);
532 if (!skb) {
533 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
534 "frame\n", dev->name);
535 return;
536 }
537 skb_reserve(skb, local->hw.extra_tx_headroom);
538
539 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
540 memset(mgmt, 0, 24 + 6);
541 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
542 IEEE80211_STYPE_AUTH);
543 if (encrypt)
544 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
545 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
546 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
547 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
548 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
549 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
550 ifsta->auth_transaction = transaction + 1;
551 mgmt->u.auth.status_code = cpu_to_le16(0);
552 if (extra)
553 memcpy(skb_put(skb, extra_len), extra, extra_len);
554
555 ieee80211_sta_tx(dev, skb, encrypt);
556}
557
558
559static void ieee80211_authenticate(struct net_device *dev,
560 struct ieee80211_if_sta *ifsta)
561{
0795af57
JP		 562 DECLARE_MAC_BUF(mac);
563
f0706e82
JB		 564 ifsta->auth_tries++;
565 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 566 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 567 " timed out\n",
0795af57 568 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 569 ifsta->state = IEEE80211_DISABLED;
570 return;
571 }
572
573 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 574 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
575 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 576
577 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
578
579 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
580}
581
582
583static void ieee80211_send_assoc(struct net_device *dev,
584 struct ieee80211_if_sta *ifsta)
585{
586 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
587 struct ieee80211_hw_mode *mode;
588 struct sk_buff *skb;
589 struct ieee80211_mgmt *mgmt;
590 u8 *pos, *ies;
591 int i, len;
592 u16 capab;
593 struct ieee80211_sta_bss *bss;
594 int wmm = 0;
595
596 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
597 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
598 ifsta->ssid_len);
599 if (!skb) {
600 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
601 "frame\n", dev->name);
602 return;
603 }
604 skb_reserve(skb, local->hw.extra_tx_headroom);
605
606 mode = local->oper_hw_mode;
607 capab = ifsta->capab;
608 if (mode->mode == MODE_IEEE80211G) {
609 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
610 WLAN_CAPABILITY_SHORT_PREAMBLE;
611 }
cffdd30d
JL		 612 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
613 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 614 if (bss) {
615 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
616 capab |= WLAN_CAPABILITY_PRIVACY;
617 if (bss->wmm_ie) {
618 wmm = 1;
619 }
620 ieee80211_rx_bss_put(dev, bss);
621 }
622
623 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
624 memset(mgmt, 0, 24);
625 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
626 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
627 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
628
d6f2da5b 629 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 630 skb_put(skb, 10);
631 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
632 IEEE80211_STYPE_REASSOC_REQ);
633 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
634 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
635 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
636 ETH_ALEN);
637 } else {
638 skb_put(skb, 4);
639 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
640 IEEE80211_STYPE_ASSOC_REQ);
641 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
642 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
643 }
644
645 /* SSID */
646 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
647 *pos++ = WLAN_EID_SSID;
648 *pos++ = ifsta->ssid_len;
649 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
650
651 len = mode->num_rates;
652 if (len > 8)
653 len = 8;
654 pos = skb_put(skb, len + 2);
655 *pos++ = WLAN_EID_SUPP_RATES;
656 *pos++ = len;
657 for (i = 0; i < len; i++) {
658 int rate = mode->rates[i].rate;
f0706e82
JB		 659 *pos++ = (u8) (rate / 5);
660 }
661
662 if (mode->num_rates > len) {
663 pos = skb_put(skb, mode->num_rates - len + 2);
664 *pos++ = WLAN_EID_EXT_SUPP_RATES;
665 *pos++ = mode->num_rates - len;
666 for (i = len; i < mode->num_rates; i++) {
667 int rate = mode->rates[i].rate;
f0706e82
JB		 668 *pos++ = (u8) (rate / 5);
669 }
670 }
671
672 if (ifsta->extra_ie) {
673 pos = skb_put(skb, ifsta->extra_ie_len);
674 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
675 }
676
d6f2da5b 677 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 678 pos = skb_put(skb, 9);
679 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
680 *pos++ = 7; /* len */
681 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
682 *pos++ = 0x50;
683 *pos++ = 0xf2;
684 *pos++ = 2; /* WME */
685 *pos++ = 0; /* WME info */
686 *pos++ = 1; /* WME ver */
687 *pos++ = 0;
688 }
c7153508
RR		 689 /* wmm support is a must to HT */
690 if (wmm && mode->ht_info.ht_supported) {
691 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
692 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
693 *pos++ = WLAN_EID_HT_CAPABILITY;
694 *pos++ = sizeof(struct ieee80211_ht_cap);
695 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
696 memcpy(pos, &tmp, sizeof(u16));
697 pos += sizeof(u16);
698 *pos++ = (mode->ht_info.ampdu_factor |
699 (mode->ht_info.ampdu_density << 2));
700 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
701 }
f0706e82
JB		 702
703 kfree(ifsta->assocreq_ies);
704 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 705 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 706 if (ifsta->assocreq_ies)
707 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
708
709 ieee80211_sta_tx(dev, skb, 0);
710}
711
712
713static void ieee80211_send_deauth(struct net_device *dev,
714 struct ieee80211_if_sta *ifsta, u16 reason)
715{
716 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
717 struct sk_buff *skb;
718 struct ieee80211_mgmt *mgmt;
719
720 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
721 if (!skb) {
722 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
723 "frame\n", dev->name);
724 return;
725 }
726 skb_reserve(skb, local->hw.extra_tx_headroom);
727
728 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
729 memset(mgmt, 0, 24);
730 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
731 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
732 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
733 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
734 IEEE80211_STYPE_DEAUTH);
735 skb_put(skb, 2);
736 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
737
738 ieee80211_sta_tx(dev, skb, 0);
739}
740
741
742static void ieee80211_send_disassoc(struct net_device *dev,
743 struct ieee80211_if_sta *ifsta, u16 reason)
744{
745 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
746 struct sk_buff *skb;
747 struct ieee80211_mgmt *mgmt;
748
749 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
750 if (!skb) {
751 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
752 "frame\n", dev->name);
753 return;
754 }
755 skb_reserve(skb, local->hw.extra_tx_headroom);
756
757 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
758 memset(mgmt, 0, 24);
759 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
760 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
761 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
762 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
763 IEEE80211_STYPE_DISASSOC);
764 skb_put(skb, 2);
765 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
766
767 ieee80211_sta_tx(dev, skb, 0);
768}
769
770
771static int ieee80211_privacy_mismatch(struct net_device *dev,
772 struct ieee80211_if_sta *ifsta)
773{
65c107ab 774 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 775 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 776 int bss_privacy;
777 int wep_privacy;
778 int privacy_invoked;
f0706e82 779
5b98b1f7 780 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 781 return 0;
782
cffdd30d
JL		 783 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
784 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 785 if (!bss)
786 return 0;
787
5b98b1f7
JB		 788 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
789 wep_privacy = !!ieee80211_sta_wep_configured(dev);
790 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 791
792 ieee80211_rx_bss_put(dev, bss);
793
5b98b1f7
JB		 794 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
795 return 0;
796
797 return 1;
f0706e82
JB		 798}
799
800
801static void ieee80211_associate(struct net_device *dev,
802 struct ieee80211_if_sta *ifsta)
803{
0795af57
JP		 804 DECLARE_MAC_BUF(mac);
805
f0706e82
JB		 806 ifsta->assoc_tries++;
807 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 808 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 809 " timed out\n",
0795af57 810 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 811 ifsta->state = IEEE80211_DISABLED;
812 return;
813 }
814
815 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 816 printk(KERN_DEBUG "%s: associate with AP %s\n",
817 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 818 if (ieee80211_privacy_mismatch(dev, ifsta)) {
819 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
820 "mixed-cell disabled - abort association\n", dev->name);
821 ifsta->state = IEEE80211_DISABLED;
822 return;
823 }
824
825 ieee80211_send_assoc(dev, ifsta);
826
827 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
828}
829
830
831static void ieee80211_associated(struct net_device *dev,
832 struct ieee80211_if_sta *ifsta)
833{
834 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
835 struct sta_info *sta;
836 int disassoc;
0795af57 837 DECLARE_MAC_BUF(mac);
f0706e82
JB		 838
839 /* TODO: start monitoring current AP signal quality and number of
840 * missed beacons. Scan other channels every now and then and search
841 * for better APs. */
842 /* TODO: remove expired BSSes */
843
844 ifsta->state = IEEE80211_ASSOCIATED;
845
846 sta = sta_info_get(local, ifsta->bssid);
847 if (!sta) {
0795af57
JP		 848 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
849 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 850 disassoc = 1;
851 } else {
852 disassoc = 0;
853 if (time_after(jiffies,
854 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 855 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 856 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 857 "current AP %s - assume out of "
f0706e82 858 "range\n",
0795af57 859 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 860 disassoc = 1;
be8755e1 861 sta_info_free(sta);
d6f2da5b 862 } else
f0706e82
JB		 863 ieee80211_send_probe_req(dev, ifsta->bssid,
864 local->scan_ssid,
865 local->scan_ssid_len);
d6f2da5b 866 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 867 } else {
d6f2da5b 868 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 869 if (time_after(jiffies, ifsta->last_probe +
870 IEEE80211_PROBE_INTERVAL)) {
871 ifsta->last_probe = jiffies;
872 ieee80211_send_probe_req(dev, ifsta->bssid,
873 ifsta->ssid,
874 ifsta->ssid_len);
875 }
876 }
877 sta_info_put(sta);
878 }
879 if (disassoc) {
2d192d95
MW		 880 ifsta->state = IEEE80211_DISABLED;
881 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 882 } else {
883 mod_timer(&ifsta->timer, jiffies +
884 IEEE80211_MONITORING_INTERVAL);
885 }
886}
887
888
889static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
890 u8 *ssid, size_t ssid_len)
891{
892 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
893 struct ieee80211_hw_mode *mode;
894 struct sk_buff *skb;
895 struct ieee80211_mgmt *mgmt;
896 u8 *pos, *supp_rates, *esupp_rates = NULL;
897 int i;
898
899 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
900 if (!skb) {
901 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
902 "request\n", dev->name);
903 return;
904 }
905 skb_reserve(skb, local->hw.extra_tx_headroom);
906
907 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
908 memset(mgmt, 0, 24);
909 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
910 IEEE80211_STYPE_PROBE_REQ);
911 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
912 if (dst) {
913 memcpy(mgmt->da, dst, ETH_ALEN);
914 memcpy(mgmt->bssid, dst, ETH_ALEN);
915 } else {
916 memset(mgmt->da, 0xff, ETH_ALEN);
917 memset(mgmt->bssid, 0xff, ETH_ALEN);
918 }
919 pos = skb_put(skb, 2 + ssid_len);
920 *pos++ = WLAN_EID_SSID;
921 *pos++ = ssid_len;
922 memcpy(pos, ssid, ssid_len);
923
924 supp_rates = skb_put(skb, 2);
925 supp_rates[0] = WLAN_EID_SUPP_RATES;
926 supp_rates[1] = 0;
927 mode = local->oper_hw_mode;
928 for (i = 0; i < mode->num_rates; i++) {
929 struct ieee80211_rate *rate = &mode->rates[i];
930 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
931 continue;
932 if (esupp_rates) {
933 pos = skb_put(skb, 1);
934 esupp_rates[1]++;
935 } else if (supp_rates[1] == 8) {
936 esupp_rates = skb_put(skb, 3);
937 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
938 esupp_rates[1] = 1;
939 pos = &esupp_rates[2];
940 } else {
941 pos = skb_put(skb, 1);
942 supp_rates[1]++;
943 }
b708e610 944 *pos = rate->rate / 5;
f0706e82
JB		 945 }
946
947 ieee80211_sta_tx(dev, skb, 0);
948}
949
950
951static int ieee80211_sta_wep_configured(struct net_device *dev)
952{
953 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
954 if (!sdata || !sdata->default_key ||
8f20fc24 955 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 956 return 0;
957 return 1;
958}
959
960
961static void ieee80211_auth_completed(struct net_device *dev,
962 struct ieee80211_if_sta *ifsta)
963{
964 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 965 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 966 ieee80211_associate(dev, ifsta);
967}
968
969
970static void ieee80211_auth_challenge(struct net_device *dev,
971 struct ieee80211_if_sta *ifsta,
972 struct ieee80211_mgmt *mgmt,
973 size_t len)
974{
975 u8 *pos;
976 struct ieee802_11_elems elems;
977
978 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
979 pos = mgmt->u.auth.variable;
67a4cce4 980 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 981 if (!elems.challenge) {
982 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
983 "frame\n", dev->name);
984 return;
985 }
986 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
987 elems.challenge_len + 2, 1);
988}
989
990
991static void ieee80211_rx_mgmt_auth(struct net_device *dev,
992 struct ieee80211_if_sta *ifsta,
993 struct ieee80211_mgmt *mgmt,
994 size_t len)
995{
996 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
997 u16 auth_alg, auth_transaction, status_code;
0795af57 998 DECLARE_MAC_BUF(mac);
f0706e82
JB		 999
1000 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1001 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1002 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1003 "%s, but not in authenticate state - ignored\n",
1004 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1005 return;
1006 }
1007
1008 if (len < 24 + 6) {
1009 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1010 "received from %s - ignored\n",
1011 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1012 return;
1013 }
1014
1015 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1016 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1017 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1018 "unknown AP (SA=%s BSSID=%s) - "
1019 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1020 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1021 return;
1022 }
1023
1024 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1025 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1026 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1027 "unknown BSSID (SA=%s BSSID=%s) - "
1028 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1029 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1030 return;
1031 }
1032
1033 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1034 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1035 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1036
0795af57 1037 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1038 "transaction=%d status=%d)\n",
0795af57 1039 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1040 auth_transaction, status_code);
1041
1042 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1043 /* IEEE 802.11 standard does not require authentication in IBSS
1044 * networks and most implementations do not seem to use it.
1045 * However, try to reply to authentication attempts if someone
1046 * has actually implemented this.
1047 * TODO: Could implement shared key authentication. */
1048 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1049 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1050 "frame (alg=%d transaction=%d)\n",
1051 dev->name, auth_alg, auth_transaction);
1052 return;
1053 }
1054 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1055 }
1056
1057 if (auth_alg != ifsta->auth_alg ||
1058 auth_transaction != ifsta->auth_transaction) {
1059 printk(KERN_DEBUG "%s: unexpected authentication frame "
1060 "(alg=%d transaction=%d)\n",
1061 dev->name, auth_alg, auth_transaction);
1062 return;
1063 }
1064
1065 if (status_code != WLAN_STATUS_SUCCESS) {
1066 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1067 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1068 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1069 u8 algs[3];
1070 const int num_algs = ARRAY_SIZE(algs);
1071 int i, pos;
1072 algs[0] = algs[1] = algs[2] = 0xff;
1073 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1074 algs[0] = WLAN_AUTH_OPEN;
1075 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1076 algs[1] = WLAN_AUTH_SHARED_KEY;
1077 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1078 algs[2] = WLAN_AUTH_LEAP;
1079 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1080 pos = 0;
1081 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1082 pos = 1;
1083 else
1084 pos = 2;
1085 for (i = 0; i < num_algs; i++) {
1086 pos++;
1087 if (pos >= num_algs)
1088 pos = 0;
1089 if (algs[pos] == ifsta->auth_alg ||
1090 algs[pos] == 0xff)
1091 continue;
1092 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1093 !ieee80211_sta_wep_configured(dev))
1094 continue;
1095 ifsta->auth_alg = algs[pos];
1096 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1097 "next try\n",
1098 dev->name, ifsta->auth_alg);
1099 break;
1100 }
1101 }
1102 return;
1103 }
1104
1105 switch (ifsta->auth_alg) {
1106 case WLAN_AUTH_OPEN:
1107 case WLAN_AUTH_LEAP:
1108 ieee80211_auth_completed(dev, ifsta);
1109 break;
1110 case WLAN_AUTH_SHARED_KEY:
1111 if (ifsta->auth_transaction == 4)
1112 ieee80211_auth_completed(dev, ifsta);
1113 else
1114 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1115 break;
1116 }
1117}
1118
1119
1120static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1121 struct ieee80211_if_sta *ifsta,
1122 struct ieee80211_mgmt *mgmt,
1123 size_t len)
1124{
1125 u16 reason_code;
0795af57 1126 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1127
1128 if (len < 24 + 2) {
1129 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1130 "received from %s - ignored\n",
1131 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1132 return;
1133 }
1134
1135 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1136 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1137 "unknown AP (SA=%s BSSID=%s) - "
1138 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1139 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1140 return;
1141 }
1142
1143 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1144
0795af57 1145 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1146 " (reason=%d)\n",
0795af57 1147 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1148
d6f2da5b 1149 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1150 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1151 }
1152
1153 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1154 ifsta->state == IEEE80211_ASSOCIATE ||
1155 ifsta->state == IEEE80211_ASSOCIATED) {
1156 ifsta->state = IEEE80211_AUTHENTICATE;
1157 mod_timer(&ifsta->timer, jiffies +
1158 IEEE80211_RETRY_AUTH_INTERVAL);
1159 }
1160
1161 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1162 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1163}
1164
1165
1166static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1167 struct ieee80211_if_sta *ifsta,
1168 struct ieee80211_mgmt *mgmt,
1169 size_t len)
1170{
1171 u16 reason_code;
0795af57 1172 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1173
1174 if (len < 24 + 2) {
1175 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1176 "received from %s - ignored\n",
1177 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1178 return;
1179 }
1180
1181 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1182 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1183 "unknown AP (SA=%s BSSID=%s) - "
1184 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1185 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1186 return;
1187 }
1188
1189 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1190
0795af57 1191 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1192 " (reason=%d)\n",
0795af57 1193 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1194
d6f2da5b 1195 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1196 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1197
1198 if (ifsta->state == IEEE80211_ASSOCIATED) {
1199 ifsta->state = IEEE80211_ASSOCIATE;
1200 mod_timer(&ifsta->timer, jiffies +
1201 IEEE80211_RETRY_AUTH_INTERVAL);
1202 }
1203
1204 ieee80211_set_disassoc(dev, ifsta, 0);
1205}
1206
1207
1208static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1209 struct ieee80211_if_sta *ifsta,
1210 struct ieee80211_mgmt *mgmt,
1211 size_t len,
1212 int reassoc)
1213{
1214 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1215 struct ieee80211_hw_mode *mode;
1216 struct sta_info *sta;
1217 u32 rates;
1218 u16 capab_info, status_code, aid;
1219 struct ieee802_11_elems elems;
1220 u8 *pos;
1221 int i, j;
0795af57 1222 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1223
1224 /* AssocResp and ReassocResp have identical structure, so process both
1225 * of them in this function. */
1226
1227 if (ifsta->state != IEEE80211_ASSOCIATE) {
1228 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1229 "%s, but not in associate state - ignored\n",
1230 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1231 return;
1232 }
1233
1234 if (len < 24 + 6) {
1235 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1236 "received from %s - ignored\n",
1237 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1238 return;
1239 }
1240
1241 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1242 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1243 "unknown AP (SA=%s BSSID=%s) - "
1244 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1245 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1246 return;
1247 }
1248
1249 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1250 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1251 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1252
0795af57 1253 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1254 "status=%d aid=%d)\n",
0795af57 1255 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1256 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1257
1258 if (status_code != WLAN_STATUS_SUCCESS) {
1259 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1260 dev->name, status_code);
8a69aa93
DD		 1261 /* if this was a reassociation, ensure we try a "full"
1262 * association next time. This works around some broken APs
1263 * which do not correctly reject reassociation requests. */
d6f2da5b 1264 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1265 return;
1266 }
1267
1dd84aa2
JB		 1268 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1269 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1270 "set\n", dev->name, aid);
1271 aid &= ~(BIT(15) | BIT(14));
1272
f0706e82 1273 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1274 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1275
1276 if (!elems.supp_rates) {
1277 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1278 dev->name);
1279 return;
1280 }
1281
5628221c
DD		 1282 /* it probably doesn't, but if the frame includes an ERP value then
1283 * update our stored copy */
1284 if (elems.erp_info && elems.erp_info_len >= 1) {
1285 struct ieee80211_sta_bss *bss
65c107ab 1286 = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1287 local->hw.conf.channel,
1288 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 1289 if (bss) {
1290 bss->erp_value = elems.erp_info[0];
1291 bss->has_erp_value = 1;
1292 ieee80211_rx_bss_put(dev, bss);
1293 }
1294 }
1295
f0706e82
JB		 1296 printk(KERN_DEBUG "%s: associated\n", dev->name);
1297 ifsta->aid = aid;
1298 ifsta->ap_capab = capab_info;
1299
1300 kfree(ifsta->assocresp_ies);
1301 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1302 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1303 if (ifsta->assocresp_ies)
1304 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1305
1306 ieee80211_set_associated(dev, ifsta, 1);
1307
1308 /* Add STA entry for the AP */
1309 sta = sta_info_get(local, ifsta->bssid);
1310 if (!sta) {
1311 struct ieee80211_sta_bss *bss;
0ec0b7ac 1312 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1313 if (!sta) {
1314 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1315 " AP\n", dev->name);
1316 return;
1317 }
65c107ab 1318 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1319 local->hw.conf.channel,
1320 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1321 if (bss) {
1322 sta->last_rssi = bss->rssi;
1323 sta->last_signal = bss->signal;
1324 sta->last_noise = bss->noise;
1325 ieee80211_rx_bss_put(dev, bss);
1326 }
1327 }
1328
1329 sta->dev = dev;
c9ee23df 1330 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1331
1332 rates = 0;
1333 mode = local->oper_hw_mode;
1334 for (i = 0; i < elems.supp_rates_len; i++) {
1335 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1336 for (j = 0; j < mode->num_rates; j++)
1337 if (mode->rates[j].rate == rate)
1338 rates |= BIT(j);
1339 }
1340 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1341 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1342 for (j = 0; j < mode->num_rates; j++)
1343 if (mode->rates[j].rate == rate)
1344 rates |= BIT(j);
1345 }
1346 sta->supp_rates = rates;
1347
1348 rate_control_rate_init(sta, local);
1349
d6f2da5b 1350 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1351 sta->flags |= WLAN_STA_WME;
1352 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1353 elems.wmm_param_len);
1354 }
1355
1356
1357 sta_info_put(sta);
1358
1359 ieee80211_associated(dev, ifsta);
1360}
1361
1362
1363/* Caller must hold local->sta_bss_lock */
1364static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1365 struct ieee80211_sta_bss *bss)
1366{
1367 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1368 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1369 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1370}
1371
1372
1373/* Caller must hold local->sta_bss_lock */
1374static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1375 struct ieee80211_sta_bss *bss)
1376{
1377 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1378 struct ieee80211_sta_bss *b, *prev = NULL;
1379 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1380 while (b) {
1381 if (b == bss) {
1382 if (!prev)
1383 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1384 bss->hnext;
1385 else
1386 prev->hnext = bss->hnext;
1387 break;
1388 }
1389 prev = b;
1390 b = b->hnext;
1391 }
1392}
1393
1394
1395static struct ieee80211_sta_bss *
cffdd30d
JL		 1396ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1397 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1398{
1399 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1400 struct ieee80211_sta_bss *bss;
1401
dd00cc48 1402 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1403 if (!bss)
1404 return NULL;
f0706e82
JB		 1405 atomic_inc(&bss->users);
1406 atomic_inc(&bss->users);
1407 memcpy(bss->bssid, bssid, ETH_ALEN);
65c107ab 1408 bss->channel = channel;
cffdd30d
JL		 1409 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1410 memcpy(bss->ssid, ssid, ssid_len);
1411 bss->ssid_len = ssid_len;
1412 }
f0706e82
JB		 1413
1414 spin_lock_bh(&local->sta_bss_lock);
1415 /* TODO: order by RSSI? */
1416 list_add_tail(&bss->list, &local->sta_bss_list);
1417 __ieee80211_rx_bss_hash_add(dev, bss);
1418 spin_unlock_bh(&local->sta_bss_lock);
1419 return bss;
1420}
1421
1422
1423static struct ieee80211_sta_bss *
cffdd30d
JL		 1424ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1425 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1426{
1427 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1428 struct ieee80211_sta_bss *bss;
1429
1430 spin_lock_bh(&local->sta_bss_lock);
1431 bss = local->sta_bss_hash[STA_HASH(bssid)];
1432 while (bss) {
cffdd30d
JL		 1433 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1434 bss->channel == channel &&
1435 bss->ssid_len == ssid_len &&
1436 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 1437 atomic_inc(&bss->users);
1438 break;
1439 }
1440 bss = bss->hnext;
1441 }
1442 spin_unlock_bh(&local->sta_bss_lock);
1443 return bss;
1444}
1445
1446
1447static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1448{
1449 kfree(bss->wpa_ie);
1450 kfree(bss->rsn_ie);
1451 kfree(bss->wmm_ie);
c7153508 1452 kfree(bss->ht_ie);
f0706e82
JB		 1453 kfree(bss);
1454}
1455
1456
1457static void ieee80211_rx_bss_put(struct net_device *dev,
1458 struct ieee80211_sta_bss *bss)
1459{
1460 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1461 if (!atomic_dec_and_test(&bss->users))
1462 return;
1463
1464 spin_lock_bh(&local->sta_bss_lock);
1465 __ieee80211_rx_bss_hash_del(dev, bss);
1466 list_del(&bss->list);
1467 spin_unlock_bh(&local->sta_bss_lock);
1468 ieee80211_rx_bss_free(bss);
1469}
1470
1471
1472void ieee80211_rx_bss_list_init(struct net_device *dev)
1473{
1474 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1475 spin_lock_init(&local->sta_bss_lock);
1476 INIT_LIST_HEAD(&local->sta_bss_list);
1477}
1478
1479
1480void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1481{
1482 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1483 struct ieee80211_sta_bss *bss, *tmp;
1484
1485 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1486 ieee80211_rx_bss_put(dev, bss);
1487}
1488
1489
1490static void ieee80211_rx_bss_info(struct net_device *dev,
1491 struct ieee80211_mgmt *mgmt,
1492 size_t len,
1493 struct ieee80211_rx_status *rx_status,
1494 int beacon)
1495{
1496 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1497 struct ieee802_11_elems elems;
1498 size_t baselen;
67a4cce4 1499 int channel, clen;
f0706e82
JB		 1500 struct ieee80211_sta_bss *bss;
1501 struct sta_info *sta;
1502 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1503 u64 timestamp;
0795af57
JP		 1504 DECLARE_MAC_BUF(mac);
1505 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 1506
1507 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1508 return; /* ignore ProbeResp to foreign address */
1509
1510#if 0
0795af57 1511 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 1512 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 1513 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 1514#endif
1515
1516 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1517 if (baselen > len)
1518 return;
1519
1520 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1521
1522 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1523 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1524#ifdef CONFIG_MAC80211_IBSS_DEBUG
1525 static unsigned long last_tsf_debug = 0;
1526 u64 tsf;
1527 if (local->ops->get_tsf)
1528 tsf = local->ops->get_tsf(local_to_hw(local));
1529 else
1530 tsf = -1LLU;
1531 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 1532 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1533 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 1534 "@%lu\n",
0795af57 1535 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 1536 (unsigned long long)tsf,
1537 (unsigned long long)timestamp,
1538 (unsigned long long)(tsf - timestamp),
1539 jiffies);
1540 last_tsf_debug = jiffies;
1541 }
1542#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1543 }
1544
67a4cce4 1545 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82
JB		 1546
1547 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1548 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1549 (sta = sta_info_get(local, mgmt->sa))) {
1550 struct ieee80211_hw_mode *mode;
1551 struct ieee80211_rate *rates;
1552 size_t num_rates;
1553 u32 supp_rates, prev_rates;
1554 int i, j;
1555
ece8eddd 1556 mode = local->sta_sw_scanning ?
f0706e82 1557 local->scan_hw_mode : local->oper_hw_mode;
ece8eddd
ZY		 1558
1559 if (local->sta_hw_scanning) {
1560 /* search for the correct mode matches the beacon */
1561 list_for_each_entry(mode, &local->modes_list, list)
1562 if (mode->mode == rx_status->phymode)
1563 break;
1564
1565 if (mode == NULL)
1566 mode = local->oper_hw_mode;
1567 }
f0706e82
JB		 1568 rates = mode->rates;
1569 num_rates = mode->num_rates;
1570
1571 supp_rates = 0;
1572 for (i = 0; i < elems.supp_rates_len +
1573 elems.ext_supp_rates_len; i++) {
1574 u8 rate = 0;
1575 int own_rate;
1576 if (i < elems.supp_rates_len)
1577 rate = elems.supp_rates[i];
1578 else if (elems.ext_supp_rates)
1579 rate = elems.ext_supp_rates
1580 [i - elems.supp_rates_len];
1581 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 1582 for (j = 0; j < num_rates; j++)
1583 if (rates[j].rate == own_rate)
1584 supp_rates |= BIT(j);
1585 }
1586
1587 prev_rates = sta->supp_rates;
1588 sta->supp_rates &= supp_rates;
1589 if (sta->supp_rates == 0) {
1590 /* No matching rates - this should not really happen.
1591 * Make sure that at least one rate is marked
1592 * supported to avoid issues with TX rate ctrl. */
1593 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1594 }
1595 if (sta->supp_rates != prev_rates) {
1596 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 1597 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 1598 "0x%x)\n",
0795af57 1599 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 1600 supp_rates, sta->supp_rates);
1601 }
1602 sta_info_put(sta);
1603 }
1604
1605 if (!elems.ssid)
1606 return;
1607
1608 if (elems.ds_params && elems.ds_params_len == 1)
1609 channel = elems.ds_params[0];
1610 else
1611 channel = rx_status->channel;
1612
cffdd30d
JL		 1613 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1614 elems.ssid, elems.ssid_len);
f0706e82 1615 if (!bss) {
cffdd30d
JL		 1616 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1617 elems.ssid, elems.ssid_len);
f0706e82
JB		 1618 if (!bss)
1619 return;
1620 } else {
1621#if 0
1622 /* TODO: order by RSSI? */
1623 spin_lock_bh(&local->sta_bss_lock);
1624 list_move_tail(&bss->list, &local->sta_bss_list);
1625 spin_unlock_bh(&local->sta_bss_lock);
1626#endif
1627 }
1628
1629 if (bss->probe_resp && beacon) {
1630 /* Do not allow beacon to override data from Probe Response. */
1631 ieee80211_rx_bss_put(dev, bss);
1632 return;
1633 }
1634
5628221c
DD		 1635 /* save the ERP value so that it is available at association time */
1636 if (elems.erp_info && elems.erp_info_len >= 1) {
1637 bss->erp_value = elems.erp_info[0];
1638 bss->has_erp_value = 1;
1639 }
1640
f0706e82
JB		 1641 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1642 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 1643
1644 bss->supp_rates_len = 0;
1645 if (elems.supp_rates) {
1646 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1647 if (clen > elems.supp_rates_len)
1648 clen = elems.supp_rates_len;
1649 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1650 clen);
1651 bss->supp_rates_len += clen;
1652 }
1653 if (elems.ext_supp_rates) {
1654 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1655 if (clen > elems.ext_supp_rates_len)
1656 clen = elems.ext_supp_rates_len;
1657 memcpy(&bss->supp_rates[bss->supp_rates_len],
1658 elems.ext_supp_rates, clen);
1659 bss->supp_rates_len += clen;
1660 }
1661
1662 if (elems.wpa &&
1663 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1664 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1665 kfree(bss->wpa_ie);
1666 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1667 if (bss->wpa_ie) {
1668 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1669 bss->wpa_ie_len = elems.wpa_len + 2;
1670 } else
1671 bss->wpa_ie_len = 0;
1672 } else if (!elems.wpa && bss->wpa_ie) {
1673 kfree(bss->wpa_ie);
1674 bss->wpa_ie = NULL;
1675 bss->wpa_ie_len = 0;
1676 }
1677
1678 if (elems.rsn &&
1679 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1680 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1681 kfree(bss->rsn_ie);
1682 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1683 if (bss->rsn_ie) {
1684 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1685 bss->rsn_ie_len = elems.rsn_len + 2;
1686 } else
1687 bss->rsn_ie_len = 0;
1688 } else if (!elems.rsn && bss->rsn_ie) {
1689 kfree(bss->rsn_ie);
1690 bss->rsn_ie = NULL;
1691 bss->rsn_ie_len = 0;
1692 }
1693
1694 if (elems.wmm_param &&
1695 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1696 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1697 kfree(bss->wmm_ie);
1698 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1699 if (bss->wmm_ie) {
1700 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1701 elems.wmm_param_len + 2);
1702 bss->wmm_ie_len = elems.wmm_param_len + 2;
1703 } else
1704 bss->wmm_ie_len = 0;
1705 } else if (!elems.wmm_param && bss->wmm_ie) {
1706 kfree(bss->wmm_ie);
1707 bss->wmm_ie = NULL;
1708 bss->wmm_ie_len = 0;
1709 }
c7153508
RR		 1710 if (elems.ht_cap_elem &&
1711 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
1712 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
1713 kfree(bss->ht_ie);
1714 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
1715 if (bss->ht_ie) {
1716 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
1717 elems.ht_cap_elem_len + 2);
1718 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
1719 } else
1720 bss->ht_ie_len = 0;
1721 } else if (!elems.ht_cap_elem && bss->ht_ie) {
1722 kfree(bss->ht_ie);
1723 bss->ht_ie = NULL;
1724 bss->ht_ie_len = 0;
1725 }
f0706e82
JB		 1726
1727 bss->hw_mode = rx_status->phymode;
f0706e82
JB		 1728 bss->freq = rx_status->freq;
1729 if (channel != rx_status->channel &&
1730 (bss->hw_mode == MODE_IEEE80211G ||
1731 bss->hw_mode == MODE_IEEE80211B) &&
1732 channel >= 1 && channel <= 14) {
1733 static const int freq_list[] = {
1734 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1735 2447, 2452, 2457, 2462, 2467, 2472, 2484
1736 };
1737 /* IEEE 802.11g/b mode can receive packets from neighboring
1738 * channels, so map the channel into frequency. */
1739 bss->freq = freq_list[channel - 1];
1740 }
1741 bss->timestamp = timestamp;
1742 bss->last_update = jiffies;
1743 bss->rssi = rx_status->ssi;
1744 bss->signal = rx_status->signal;
1745 bss->noise = rx_status->noise;
1746 if (!beacon)
1747 bss->probe_resp++;
1748 ieee80211_rx_bss_put(dev, bss);
1749}
1750
1751
1752static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1753 struct ieee80211_mgmt *mgmt,
1754 size_t len,
1755 struct ieee80211_rx_status *rx_status)
1756{
1757 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1758}
1759
1760
1761static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1762 struct ieee80211_mgmt *mgmt,
1763 size_t len,
1764 struct ieee80211_rx_status *rx_status)
1765{
f0706e82
JB		 1766 struct ieee80211_sub_if_data *sdata;
1767 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1768 size_t baselen;
1769 struct ieee802_11_elems elems;
1770
1771 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1772
1773 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1774 if (sdata->type != IEEE80211_IF_TYPE_STA)
1775 return;
1776 ifsta = &sdata->u.sta;
1777
d6f2da5b 1778 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1779 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1780 return;
1781
1782 /* Process beacon from the current BSS */
1783 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1784 if (baselen > len)
1785 return;
1786
67a4cce4 1787 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 1788
5628221c
DD		 1789 if (elems.erp_info && elems.erp_info_len >= 1)
1790 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82 1791
d6f2da5b 1792 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1793 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1794 elems.wmm_param_len);
1795 }
1796}
1797
1798
1799static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1800 struct ieee80211_if_sta *ifsta,
1801 struct ieee80211_mgmt *mgmt,
1802 size_t len,
1803 struct ieee80211_rx_status *rx_status)
1804{
1805 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1806 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1807 int tx_last_beacon;
1808 struct sk_buff *skb;
1809 struct ieee80211_mgmt *resp;
1810 u8 *pos, *end;
0795af57
JP		 1811 DECLARE_MAC_BUF(mac);
1812#ifdef CONFIG_MAC80211_IBSS_DEBUG
1813 DECLARE_MAC_BUF(mac2);
1814 DECLARE_MAC_BUF(mac3);
1815#endif
f0706e82
JB		 1816
1817 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1818 ifsta->state != IEEE80211_IBSS_JOINED ||
1819 len < 24 + 2 || !ifsta->probe_resp)
1820 return;
1821
1822 if (local->ops->tx_last_beacon)
1823 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1824 else
1825 tx_last_beacon = 1;
1826
1827#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1828 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1829 "%s (tx_last_beacon=%d)\n",
1830 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1831 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1832#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1833
1834 if (!tx_last_beacon)
1835 return;
1836
1837 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1838 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1839 return;
1840
1841 end = ((u8 *) mgmt) + len;
1842 pos = mgmt->u.probe_req.variable;
1843 if (pos[0] != WLAN_EID_SSID ||
1844 pos + 2 + pos[1] > end) {
1845 if (net_ratelimit()) {
1846 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 1847 "from %s\n",
1848 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1849 }
1850 return;
1851 }
1852 if (pos[1] != 0 &&
1853 (pos[1] != ifsta->ssid_len ||
1854 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1855 /* Ignore ProbeReq for foreign SSID */
1856 return;
1857 }
1858
1859 /* Reply with ProbeResp */
0ec0b7ac 1860 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1861 if (!skb)
1862 return;
1863
1864 resp = (struct ieee80211_mgmt *) skb->data;
1865 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1866#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1867 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1868 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 1869#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1870 ieee80211_sta_tx(dev, skb, 0);
1871}
1872
1873
1874void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1875 struct ieee80211_rx_status *rx_status)
1876{
1877 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1878 struct ieee80211_sub_if_data *sdata;
1879 struct ieee80211_if_sta *ifsta;
1880 struct ieee80211_mgmt *mgmt;
1881 u16 fc;
1882
1883 if (skb->len < 24)
1884 goto fail;
1885
1886 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1887 ifsta = &sdata->u.sta;
1888
1889 mgmt = (struct ieee80211_mgmt *) skb->data;
1890 fc = le16_to_cpu(mgmt->frame_control);
1891
1892 switch (fc & IEEE80211_FCTL_STYPE) {
1893 case IEEE80211_STYPE_PROBE_REQ:
1894 case IEEE80211_STYPE_PROBE_RESP:
1895 case IEEE80211_STYPE_BEACON:
1896 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1897 case IEEE80211_STYPE_AUTH:
1898 case IEEE80211_STYPE_ASSOC_RESP:
1899 case IEEE80211_STYPE_REASSOC_RESP:
1900 case IEEE80211_STYPE_DEAUTH:
1901 case IEEE80211_STYPE_DISASSOC:
1902 skb_queue_tail(&ifsta->skb_queue, skb);
1903 queue_work(local->hw.workqueue, &ifsta->work);
1904 return;
1905 default:
1906 printk(KERN_DEBUG "%s: received unknown management frame - "
1907 "stype=%d\n", dev->name,
1908 (fc & IEEE80211_FCTL_STYPE) >> 4);
1909 break;
1910 }
1911
1912 fail:
1913 kfree_skb(skb);
1914}
1915
1916
1917static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1918 struct sk_buff *skb)
1919{
1920 struct ieee80211_rx_status *rx_status;
1921 struct ieee80211_sub_if_data *sdata;
1922 struct ieee80211_if_sta *ifsta;
1923 struct ieee80211_mgmt *mgmt;
1924 u16 fc;
1925
1926 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1927 ifsta = &sdata->u.sta;
1928
1929 rx_status = (struct ieee80211_rx_status *) skb->cb;
1930 mgmt = (struct ieee80211_mgmt *) skb->data;
1931 fc = le16_to_cpu(mgmt->frame_control);
1932
1933 switch (fc & IEEE80211_FCTL_STYPE) {
1934 case IEEE80211_STYPE_PROBE_REQ:
1935 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1936 rx_status);
1937 break;
1938 case IEEE80211_STYPE_PROBE_RESP:
1939 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1940 break;
1941 case IEEE80211_STYPE_BEACON:
1942 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1943 break;
1944 case IEEE80211_STYPE_AUTH:
1945 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1946 break;
1947 case IEEE80211_STYPE_ASSOC_RESP:
1948 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1949 break;
1950 case IEEE80211_STYPE_REASSOC_RESP:
1951 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1952 break;
1953 case IEEE80211_STYPE_DEAUTH:
1954 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1955 break;
1956 case IEEE80211_STYPE_DISASSOC:
1957 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1958 break;
1959 }
1960
1961 kfree_skb(skb);
1962}
1963
1964
ece8eddd
ZY		 1965ieee80211_txrx_result
1966ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1967 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 1968{
1969 struct ieee80211_mgmt *mgmt;
1970 u16 fc;
1971
ece8eddd
ZY		 1972 if (skb->len < 2)
1973 return TXRX_DROP;
f0706e82
JB		 1974
1975 mgmt = (struct ieee80211_mgmt *) skb->data;
1976 fc = le16_to_cpu(mgmt->frame_control);
1977
ece8eddd
ZY		 1978 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
1979 return TXRX_CONTINUE;
1980
1981 if (skb->len < 24)
1982 return TXRX_DROP;
1983
f0706e82
JB		 1984 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1985 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1986 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1987 skb->len, rx_status);
ece8eddd
ZY		 1988 dev_kfree_skb(skb);
1989 return TXRX_QUEUED;
f0706e82
JB		 1990 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1991 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1992 rx_status);
ece8eddd
ZY		 1993 dev_kfree_skb(skb);
1994 return TXRX_QUEUED;
f0706e82
JB		 1995 }
1996 }
ece8eddd 1997 return TXRX_CONTINUE;
f0706e82
JB		 1998}
1999
2000
2001static int ieee80211_sta_active_ibss(struct net_device *dev)
2002{
2003 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2004 int active = 0;
2005 struct sta_info *sta;
2006
be8755e1 2007 read_lock_bh(&local->sta_lock);
f0706e82
JB		 2008 list_for_each_entry(sta, &local->sta_list, list) {
2009 if (sta->dev == dev &&
2010 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2011 jiffies)) {
2012 active++;
2013 break;
2014 }
2015 }
be8755e1 2016 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 2017
2018 return active;
2019}
2020
2021
2022static void ieee80211_sta_expire(struct net_device *dev)
2023{
2024 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2025 struct sta_info *sta, *tmp;
be8755e1 2026 LIST_HEAD(tmp_list);
0795af57 2027 DECLARE_MAC_BUF(mac);
f0706e82 2028
be8755e1 2029 write_lock_bh(&local->sta_lock);
f0706e82
JB		 2030 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2031 if (time_after(jiffies, sta->last_rx +
2032 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 2033 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2034 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 2035 __sta_info_get(sta);
2036 sta_info_remove(sta);
2037 list_add(&sta->list, &tmp_list);
f0706e82 2038 }
be8755e1
MW		 2039 write_unlock_bh(&local->sta_lock);
2040
2041 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2042 sta_info_free(sta);
2043 sta_info_put(sta);
2044 }
f0706e82
JB		 2045}
2046
2047
2048static void ieee80211_sta_merge_ibss(struct net_device *dev,
2049 struct ieee80211_if_sta *ifsta)
2050{
2051 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2052
2053 ieee80211_sta_expire(dev);
2054 if (ieee80211_sta_active_ibss(dev))
2055 return;
2056
2057 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2058 "IBSS networks with same SSID (merge)\n", dev->name);
2059 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2060}
2061
2062
2063void ieee80211_sta_timer(unsigned long data)
2064{
2065 struct ieee80211_sub_if_data *sdata =
2066 (struct ieee80211_sub_if_data *) data;
2067 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2068 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2069
2070 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2071 queue_work(local->hw.workqueue, &ifsta->work);
2072}
2073
2074
2075void ieee80211_sta_work(struct work_struct *work)
2076{
2077 struct ieee80211_sub_if_data *sdata =
2078 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2079 struct net_device *dev = sdata->dev;
2080 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2081 struct ieee80211_if_sta *ifsta;
2082 struct sk_buff *skb;
2083
2084 if (!netif_running(dev))
2085 return;
2086
ece8eddd 2087 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 2088 return;
2089
2090 if (sdata->type != IEEE80211_IF_TYPE_STA &&
2091 sdata->type != IEEE80211_IF_TYPE_IBSS) {
2092 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2093 "(type=%d)\n", dev->name, sdata->type);
2094 return;
2095 }
2096 ifsta = &sdata->u.sta;
2097
2098 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2099 ieee80211_sta_rx_queued_mgmt(dev, skb);
2100
2101 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2102 ifsta->state != IEEE80211_ASSOCIATE &&
2103 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 2104 if (ifsta->scan_ssid_len)
2105 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2106 else
2107 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 2108 return;
2109 }
2110
2111 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2112 if (ieee80211_sta_config_auth(dev, ifsta))
2113 return;
2114 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2115 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2116 return;
2117
2118 switch (ifsta->state) {
2119 case IEEE80211_DISABLED:
2120 break;
2121 case IEEE80211_AUTHENTICATE:
2122 ieee80211_authenticate(dev, ifsta);
2123 break;
2124 case IEEE80211_ASSOCIATE:
2125 ieee80211_associate(dev, ifsta);
2126 break;
2127 case IEEE80211_ASSOCIATED:
2128 ieee80211_associated(dev, ifsta);
2129 break;
2130 case IEEE80211_IBSS_SEARCH:
2131 ieee80211_sta_find_ibss(dev, ifsta);
2132 break;
2133 case IEEE80211_IBSS_JOINED:
2134 ieee80211_sta_merge_ibss(dev, ifsta);
2135 break;
2136 default:
2137 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2138 ifsta->state);
2139 break;
2140 }
2141
2142 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2143 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2144 "mixed-cell disabled - disassociate\n", dev->name);
2145
2146 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2147 ieee80211_set_disassoc(dev, ifsta, 0);
2148 }
2149}
2150
2151
2152static void ieee80211_sta_reset_auth(struct net_device *dev,
2153 struct ieee80211_if_sta *ifsta)
2154{
2155 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2156
2157 if (local->ops->reset_tsf) {
2158 /* Reset own TSF to allow time synchronization work. */
2159 local->ops->reset_tsf(local_to_hw(local));
2160 }
2161
2162 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2163
2164
2165 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2166 ifsta->auth_alg = WLAN_AUTH_OPEN;
2167 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2168 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2169 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2170 ifsta->auth_alg = WLAN_AUTH_LEAP;
2171 else
2172 ifsta->auth_alg = WLAN_AUTH_OPEN;
2173 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2174 ifsta->auth_alg);
2175 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2176 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2177 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2178 netif_carrier_off(dev);
2179}
2180
2181
2182void ieee80211_sta_req_auth(struct net_device *dev,
2183 struct ieee80211_if_sta *ifsta)
2184{
2185 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2186 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2187
2188 if (sdata->type != IEEE80211_IF_TYPE_STA)
2189 return;
2190
d6f2da5b
JS		 2191 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2192 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2193 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2194 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2195 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2196 queue_work(local->hw.workqueue, &ifsta->work);
2197 }
2198}
2199
2200static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2201 const char *ssid, int ssid_len)
2202{
2203 int tmp, hidden_ssid;
2204
48225709
MW		 2205 if (ssid_len == ifsta->ssid_len &&
2206 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2207 return 1;
2208
d6f2da5b 2209 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2210 return 0;
2211
2212 hidden_ssid = 1;
2213 tmp = ssid_len;
2214 while (tmp--) {
2215 if (ssid[tmp] != '\0') {
2216 hidden_ssid = 0;
2217 break;
2218 }
2219 }
2220
2221 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2222 return 1;
2223
2224 if (ssid_len == 1 && ssid[0] == ' ')
2225 return 1;
2226
2227 return 0;
2228}
2229
2230static int ieee80211_sta_config_auth(struct net_device *dev,
2231 struct ieee80211_if_sta *ifsta)
2232{
2233 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2234 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2235 struct ieee80211_sta_bss *bss, *selected = NULL;
2236 int top_rssi = 0, freq;
2237
d6f2da5b
JS		 2238 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2239 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2240 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2241 ieee80211_sta_reset_auth(dev, ifsta);
2242 return 0;
2243 }
2244
2245 spin_lock_bh(&local->sta_bss_lock);
2246 freq = local->oper_channel->freq;
2247 list_for_each_entry(bss, &local->sta_bss_list, list) {
2248 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2249 continue;
2250
2251 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2252 !!sdata->default_key)
2253 continue;
2254
d6f2da5b
JS		 2255 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2256 bss->freq != freq)
f0706e82
JB		 2257 continue;
2258
d6f2da5b 2259 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2260 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2261 continue;
2262
d6f2da5b 2263 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2264 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2265 continue;
2266
2267 if (!selected || top_rssi < bss->rssi) {
2268 selected = bss;
2269 top_rssi = bss->rssi;
2270 }
2271 }
2272 if (selected)
2273 atomic_inc(&selected->users);
2274 spin_unlock_bh(&local->sta_bss_lock);
2275
2276 if (selected) {
2277 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2278 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2279 ieee80211_sta_set_ssid(dev, selected->ssid,
2280 selected->ssid_len);
2281 ieee80211_sta_set_bssid(dev, selected->bssid);
2282 ieee80211_rx_bss_put(dev, selected);
2283 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2284 ieee80211_sta_reset_auth(dev, ifsta);
2285 return 0;
2286 } else {
2287 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2288 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2289 ieee80211_sta_start_scan(dev, NULL, 0);
2290 else
2291 ieee80211_sta_start_scan(dev, ifsta->ssid,
2292 ifsta->ssid_len);
f0706e82
JB		 2293 ifsta->state = IEEE80211_AUTHENTICATE;
2294 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2295 } else
2296 ifsta->state = IEEE80211_DISABLED;
2297 }
f0706e82
JB		 2298 return -1;
2299}
2300
2301static int ieee80211_sta_join_ibss(struct net_device *dev,
2302 struct ieee80211_if_sta *ifsta,
2303 struct ieee80211_sta_bss *bss)
2304{
2305 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2306 int res, rates, i, j;
2307 struct sk_buff *skb;
2308 struct ieee80211_mgmt *mgmt;
2309 struct ieee80211_tx_control control;
2310 struct ieee80211_rate *rate;
2311 struct ieee80211_hw_mode *mode;
2312 struct rate_control_extra extra;
2313 u8 *pos;
2314 struct ieee80211_sub_if_data *sdata;
2315
2316 /* Remove possible STA entries from other IBSS networks. */
2317 sta_info_flush(local, NULL);
2318
2319 if (local->ops->reset_tsf) {
2320 /* Reset own TSF to allow time synchronization work. */
2321 local->ops->reset_tsf(local_to_hw(local));
2322 }
2323 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2324 res = ieee80211_if_config(dev);
2325 if (res)
2326 return res;
2327
2328 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2329
2330 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2331 sdata->drop_unencrypted = bss->capability &
2332 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2333
2334 res = ieee80211_set_channel(local, -1, bss->freq);
2335
2336 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2337 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2338 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2339 local->hw.conf.freq);
2340 return -1;
2341 }
2342
2343 /* Set beacon template based on scan results */
2344 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2345 do {
2346 if (!skb)
2347 break;
2348
2349 skb_reserve(skb, local->hw.extra_tx_headroom);
2350
2351 mgmt = (struct ieee80211_mgmt *)
2352 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2353 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2354 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2355 IEEE80211_STYPE_BEACON);
2356 memset(mgmt->da, 0xff, ETH_ALEN);
2357 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2358 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2359 mgmt->u.beacon.beacon_int =
2360 cpu_to_le16(local->hw.conf.beacon_int);
2361 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2362
2363 pos = skb_put(skb, 2 + ifsta->ssid_len);
2364 *pos++ = WLAN_EID_SSID;
2365 *pos++ = ifsta->ssid_len;
2366 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2367
2368 rates = bss->supp_rates_len;
2369 if (rates > 8)
2370 rates = 8;
2371 pos = skb_put(skb, 2 + rates);
2372 *pos++ = WLAN_EID_SUPP_RATES;
2373 *pos++ = rates;
2374 memcpy(pos, bss->supp_rates, rates);
2375
2376 pos = skb_put(skb, 2 + 1);
2377 *pos++ = WLAN_EID_DS_PARAMS;
2378 *pos++ = 1;
2379 *pos++ = bss->channel;
2380
2381 pos = skb_put(skb, 2 + 2);
2382 *pos++ = WLAN_EID_IBSS_PARAMS;
2383 *pos++ = 2;
2384 /* FIX: set ATIM window based on scan results */
2385 *pos++ = 0;
2386 *pos++ = 0;
2387
2388 if (bss->supp_rates_len > 8) {
2389 rates = bss->supp_rates_len - 8;
2390 pos = skb_put(skb, 2 + rates);
2391 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2392 *pos++ = rates;
2393 memcpy(pos, &bss->supp_rates[8], rates);
2394 }
2395
2396 memset(&control, 0, sizeof(control));
2397 memset(&extra, 0, sizeof(extra));
2398 extra.mode = local->oper_hw_mode;
2399 rate = rate_control_get_rate(local, dev, skb, &extra);
2400 if (!rate) {
2401 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2402 "for IBSS beacon\n", dev->name);
2403 break;
2404 }
13262ffd
JS		 2405 control.tx_rate =
2406 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2407 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
f0706e82
JB		 2408 rate->val2 : rate->val;
2409 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2410 control.power_level = local->hw.conf.power_level;
2411 control.flags |= IEEE80211_TXCTL_NO_ACK;
2412 control.retry_limit = 1;
2413
2414 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2415 if (ifsta->probe_resp) {
2416 mgmt = (struct ieee80211_mgmt *)
2417 ifsta->probe_resp->data;
2418 mgmt->frame_control =
2419 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2420 IEEE80211_STYPE_PROBE_RESP);
2421 } else {
2422 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2423 "template for IBSS\n", dev->name);
2424 }
2425
2426 if (local->ops->beacon_update &&
2427 local->ops->beacon_update(local_to_hw(local),
2428 skb, &control) == 0) {
2429 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2430 "template based on scan results\n", dev->name);
2431 skb = NULL;
2432 }
2433
2434 rates = 0;
2435 mode = local->oper_hw_mode;
2436 for (i = 0; i < bss->supp_rates_len; i++) {
2437 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 2438 for (j = 0; j < mode->num_rates; j++)
2439 if (mode->rates[j].rate == bitrate)
2440 rates |= BIT(j);
2441 }
2442 ifsta->supp_rates_bits = rates;
2443 } while (0);
2444
2445 if (skb) {
2446 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2447 "template\n", dev->name);
2448 dev_kfree_skb(skb);
2449 }
2450
2451 ifsta->state = IEEE80211_IBSS_JOINED;
2452 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2453
2454 ieee80211_rx_bss_put(dev, bss);
2455
2456 return res;
2457}
2458
2459
2460static int ieee80211_sta_create_ibss(struct net_device *dev,
2461 struct ieee80211_if_sta *ifsta)
2462{
2463 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2464 struct ieee80211_sta_bss *bss;
cffdd30d 2465 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 2466 struct ieee80211_hw_mode *mode;
2467 u8 bssid[ETH_ALEN], *pos;
2468 int i;
0795af57 2469 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2470
2471#if 0
2472 /* Easier testing, use fixed BSSID. */
2473 memset(bssid, 0xfe, ETH_ALEN);
2474#else
2475 /* Generate random, not broadcast, locally administered BSSID. Mix in
2476 * own MAC address to make sure that devices that do not have proper
2477 * random number generator get different BSSID. */
2478 get_random_bytes(bssid, ETH_ALEN);
2479 for (i = 0; i < ETH_ALEN; i++)
2480 bssid[i] ^= dev->dev_addr[i];
2481 bssid[0] &= ~0x01;
2482 bssid[0] |= 0x02;
2483#endif
2484
0795af57
JP		 2485 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2486 dev->name, print_mac(mac, bssid));
f0706e82 2487
cffdd30d
JL		 2488 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2489 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2490 if (!bss)
2491 return -ENOMEM;
2492
f0706e82
JB		 2493 mode = local->oper_hw_mode;
2494
2495 if (local->hw.conf.beacon_int == 0)
2496 local->hw.conf.beacon_int = 100;
2497 bss->beacon_int = local->hw.conf.beacon_int;
2498 bss->hw_mode = local->hw.conf.phymode;
f0706e82
JB		 2499 bss->freq = local->hw.conf.freq;
2500 bss->last_update = jiffies;
2501 bss->capability = WLAN_CAPABILITY_IBSS;
2502 if (sdata->default_key) {
2503 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2504 } else
2505 sdata->drop_unencrypted = 0;
2506 bss->supp_rates_len = mode->num_rates;
2507 pos = bss->supp_rates;
2508 for (i = 0; i < mode->num_rates; i++) {
2509 int rate = mode->rates[i].rate;
f0706e82
JB		 2510 *pos++ = (u8) (rate / 5);
2511 }
2512
2513 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2514}
2515
2516
2517static int ieee80211_sta_find_ibss(struct net_device *dev,
2518 struct ieee80211_if_sta *ifsta)
2519{
2520 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2521 struct ieee80211_sta_bss *bss;
2522 int found = 0;
2523 u8 bssid[ETH_ALEN];
2524 int active_ibss;
0795af57
JP		 2525 DECLARE_MAC_BUF(mac);
2526 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2527
2528 if (ifsta->ssid_len == 0)
2529 return -EINVAL;
2530
2531 active_ibss = ieee80211_sta_active_ibss(dev);
2532#ifdef CONFIG_MAC80211_IBSS_DEBUG
2533 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2534 dev->name, active_ibss);
2535#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2536 spin_lock_bh(&local->sta_bss_lock);
2537 list_for_each_entry(bss, &local->sta_bss_list, list) {
2538 if (ifsta->ssid_len != bss->ssid_len ||
2539 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2540 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2541 continue;
2542#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2543 printk(KERN_DEBUG " bssid=%s found\n",
2544 print_mac(mac, bss->bssid));
f0706e82
JB		 2545#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2546 memcpy(bssid, bss->bssid, ETH_ALEN);
2547 found = 1;
2548 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2549 break;
2550 }
2551 spin_unlock_bh(&local->sta_bss_lock);
2552
2553#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2554 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2555 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 2556#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2557 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
cffdd30d
JL		 2558 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2559 ifsta->ssid, ifsta->ssid_len))) {
0795af57 2560 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2561 " based on configured SSID\n",
0795af57 2562 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2563 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2564 }
2565#ifdef CONFIG_MAC80211_IBSS_DEBUG
2566 printk(KERN_DEBUG " did not try to join ibss\n");
2567#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2568
2569 /* Selected IBSS not found in current scan results - try to scan */
2570 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2571 !ieee80211_sta_active_ibss(dev)) {
2572 mod_timer(&ifsta->timer, jiffies +
2573 IEEE80211_IBSS_MERGE_INTERVAL);
2574 } else if (time_after(jiffies, local->last_scan_completed +
2575 IEEE80211_SCAN_INTERVAL)) {
2576 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2577 "join\n", dev->name);
2578 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2579 ifsta->ssid_len);
2580 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2581 int interval = IEEE80211_SCAN_INTERVAL;
2582
2583 if (time_after(jiffies, ifsta->ibss_join_req +
2584 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2585 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 2586 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2587 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 2588 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 2589 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2590 " configured channel %d (%d MHz)\n",
2591 dev->name, local->hw.conf.channel,
2592 local->hw.conf.freq);
2593 }
2594
2595 /* No IBSS found - decrease scan interval and continue
2596 * scanning. */
2597 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2598 }
2599
2600 ifsta->state = IEEE80211_IBSS_SEARCH;
2601 mod_timer(&ifsta->timer, jiffies + interval);
2602 return 0;
2603 }
2604
2605 return 0;
2606}
2607
2608
2609int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2610{
2611 struct ieee80211_sub_if_data *sdata;
2612 struct ieee80211_if_sta *ifsta;
2613 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2614
2615 if (len > IEEE80211_MAX_SSID_LEN)
2616 return -EINVAL;
2617
2618 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2619 * not defined. */
2620 if (local->ops->conf_tx) {
2621 struct ieee80211_tx_queue_params qparam;
2622 int i;
2623
2624 memset(&qparam, 0, sizeof(qparam));
2625 /* TODO: are these ok defaults for all hw_modes? */
2626 qparam.aifs = 2;
2627 qparam.cw_min =
2628 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2629 qparam.cw_max = 1023;
2630 qparam.burst_time = 0;
2631 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2632 {
2633 local->ops->conf_tx(local_to_hw(local),
2634 i + IEEE80211_TX_QUEUE_DATA0,
2635 &qparam);
2636 }
2637 /* IBSS uses different parameters for Beacon sending */
2638 qparam.cw_min++;
2639 qparam.cw_min *= 2;
2640 qparam.cw_min--;
2641 local->ops->conf_tx(local_to_hw(local),
2642 IEEE80211_TX_QUEUE_BEACON, &qparam);
2643 }
2644
2645 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2646 ifsta = &sdata->u.sta;
2647
2648 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 2649 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2650 memcpy(ifsta->ssid, ssid, len);
2651 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2652 ifsta->ssid_len = len;
2653
d6f2da5b
JS		 2654 if (len)
2655 ifsta->flags |= IEEE80211_STA_SSID_SET;
2656 else
2657 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2658 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2659 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 2660 ifsta->ibss_join_req = jiffies;
2661 ifsta->state = IEEE80211_IBSS_SEARCH;
2662 return ieee80211_sta_find_ibss(dev, ifsta);
2663 }
2664 return 0;
2665}
2666
2667
2668int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2669{
2670 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2671 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2672 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2673 *len = ifsta->ssid_len;
2674 return 0;
2675}
2676
2677
2678int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2679{
2680 struct ieee80211_sub_if_data *sdata;
2681 struct ieee80211_if_sta *ifsta;
2682 int res;
2683
2684 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2685 ifsta = &sdata->u.sta;
2686
2687 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2688 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2689 res = ieee80211_if_config(dev);
2690 if (res) {
2691 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2692 "the low-level driver\n", dev->name);
2693 return res;
2694 }
2695 }
2696
d6f2da5b
JS		 2697 if (is_valid_ether_addr(bssid))
2698 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2699 else
d6f2da5b
JS		 2700 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2701
f0706e82
JB		 2702 return 0;
2703}
2704
2705
2706static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2707 struct ieee80211_sub_if_data *sdata,
2708 int powersave)
2709{
2710 struct sk_buff *skb;
2711 struct ieee80211_hdr *nullfunc;
2712 u16 fc;
2713
2714 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2715 if (!skb) {
2716 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2717 "frame\n", sdata->dev->name);
2718 return;
2719 }
2720 skb_reserve(skb, local->hw.extra_tx_headroom);
2721
2722 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2723 memset(nullfunc, 0, 24);
2724 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2725 IEEE80211_FCTL_TODS;
2726 if (powersave)
2727 fc |= IEEE80211_FCTL_PM;
2728 nullfunc->frame_control = cpu_to_le16(fc);
2729 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2730 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2731 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2732
2733 ieee80211_sta_tx(sdata->dev, skb, 0);
2734}
2735
2736
2737void ieee80211_scan_completed(struct ieee80211_hw *hw)
2738{
2739 struct ieee80211_local *local = hw_to_local(hw);
2740 struct net_device *dev = local->scan_dev;
2741 struct ieee80211_sub_if_data *sdata;
2742 union iwreq_data wrqu;
2743
2744 local->last_scan_completed = jiffies;
ece8eddd
ZY		 2745 memset(&wrqu, 0, sizeof(wrqu));
2746 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 2747
ece8eddd
ZY		 2748 if (local->sta_hw_scanning) {
2749 local->sta_hw_scanning = 0;
2750 goto done;
2751 }
2752
2753 local->sta_sw_scanning = 0;
f0706e82 2754 if (ieee80211_hw_config(local))
4b50e388 2755 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 2756 "channel after scan\n", dev->name);
2757
4150c572
JB		 2758
2759 netif_tx_lock_bh(local->mdev);
2760 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
2761 local->ops->configure_filter(local_to_hw(local),
2762 FIF_BCN_PRBRESP_PROMISC,
2763 &local->filter_flags,
2764 local->mdev->mc_count,
2765 local->mdev->mc_list);
2766
2767 netif_tx_unlock_bh(local->mdev);
f0706e82 2768
79010420
JB		 2769 rcu_read_lock();
2770 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 2771
2772 /* No need to wake the master device. */
2773 if (sdata->dev == local->mdev)
2774 continue;
2775
f0706e82 2776 if (sdata->type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 2777 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 2778 ieee80211_send_nullfunc(local, sdata, 0);
2779 ieee80211_sta_timer((unsigned long)sdata);
2780 }
14042cbe 2781
f0706e82
JB		 2782 netif_wake_queue(sdata->dev);
2783 }
79010420 2784 rcu_read_unlock();
f0706e82 2785
ece8eddd 2786done:
f0706e82
JB		 2787 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2788 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2789 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 2790 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 2791 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2792 !ieee80211_sta_active_ibss(dev)))
2793 ieee80211_sta_find_ibss(dev, ifsta);
2794 }
2795}
2796EXPORT_SYMBOL(ieee80211_scan_completed);
2797
2798void ieee80211_sta_scan_work(struct work_struct *work)
2799{
2800 struct ieee80211_local *local =
2801 container_of(work, struct ieee80211_local, scan_work.work);
2802 struct net_device *dev = local->scan_dev;
2803 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2804 struct ieee80211_hw_mode *mode;
2805 struct ieee80211_channel *chan;
2806 int skip;
2807 unsigned long next_delay = 0;
2808
ece8eddd 2809 if (!local->sta_sw_scanning)
f0706e82
JB		 2810 return;
2811
2812 switch (local->scan_state) {
2813 case SCAN_SET_CHANNEL:
2814 mode = local->scan_hw_mode;
2815 if (local->scan_hw_mode->list.next == &local->modes_list &&
2816 local->scan_channel_idx >= mode->num_channels) {
2817 ieee80211_scan_completed(local_to_hw(local));
2818 return;
2819 }
2820 skip = !(local->enabled_modes & (1 << mode->mode));
2821 chan = &mode->channels[local->scan_channel_idx];
2822 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2823 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2824 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2825 (local->hw_modes & local->enabled_modes &
2826 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2827 skip = 1;
2828
2829 if (!skip) {
2830#if 0
2831 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2832 dev->name, chan->chan, chan->freq);
2833#endif
2834
2835 local->scan_channel = chan;
2836 if (ieee80211_hw_config(local)) {
2837 printk(KERN_DEBUG "%s: failed to set channel "
2838 "%d (%d MHz) for scan\n", dev->name,
2839 chan->chan, chan->freq);
2840 skip = 1;
2841 }
2842 }
2843
2844 local->scan_channel_idx++;
2845 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2846 if (local->scan_hw_mode->list.next != &local->modes_list) {
2847 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2848 struct ieee80211_hw_mode,
2849 list);
2850 local->scan_channel_idx = 0;
2851 }
2852 }
2853
2854 if (skip)
2855 break;
2856
2857 next_delay = IEEE80211_PROBE_DELAY +
2858 usecs_to_jiffies(local->hw.channel_change_time);
2859 local->scan_state = SCAN_SEND_PROBE;
2860 break;
2861 case SCAN_SEND_PROBE:
2862 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2863 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2864 local->scan_ssid_len);
2865 next_delay = IEEE80211_CHANNEL_TIME;
2866 } else
2867 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2868 local->scan_state = SCAN_SET_CHANNEL;
2869 break;
2870 }
2871
ece8eddd 2872 if (local->sta_sw_scanning)
f0706e82
JB		 2873 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2874 next_delay);
2875}
2876
2877
2878static int ieee80211_sta_start_scan(struct net_device *dev,
2879 u8 *ssid, size_t ssid_len)
2880{
2881 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2882 struct ieee80211_sub_if_data *sdata;
2883
2884 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2885 return -EINVAL;
2886
2887 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2888 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2889 * BSSID: MACAddress
2890 * SSID
2891 * ScanType: ACTIVE, PASSIVE
2892 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2893 * a Probe frame during active scanning
2894 * ChannelList
2895 * MinChannelTime (>= ProbeDelay), in TU
2896 * MaxChannelTime: (>= MinChannelTime), in TU
2897 */
2898
2899 /* MLME-SCAN.confirm
2900 * BSSDescriptionSet
2901 * ResultCode: SUCCESS, INVALID_PARAMETERS
2902 */
2903
ece8eddd 2904 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 2905 if (local->scan_dev == dev)
2906 return 0;
2907 return -EBUSY;
2908 }
2909
2910 if (local->ops->hw_scan) {
2911 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 2912 ssid, ssid_len);
f0706e82 2913 if (!rc) {
ece8eddd 2914 local->sta_hw_scanning = 1;
f0706e82
JB		 2915 local->scan_dev = dev;
2916 }
2917 return rc;
2918 }
2919
ece8eddd 2920 local->sta_sw_scanning = 1;
f0706e82 2921
79010420
JB		 2922 rcu_read_lock();
2923 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 2924
2925 /* Don't stop the master interface, otherwise we can't transmit
2926 * probes! */
2927 if (sdata->dev == local->mdev)
2928 continue;
2929
f0706e82
JB		 2930 netif_stop_queue(sdata->dev);
2931 if (sdata->type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 2932 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2933 ieee80211_send_nullfunc(local, sdata, 1);
2934 }
79010420 2935 rcu_read_unlock();
f0706e82
JB		 2936
2937 if (ssid) {
2938 local->scan_ssid_len = ssid_len;
2939 memcpy(local->scan_ssid, ssid, ssid_len);
2940 } else
2941 local->scan_ssid_len = 0;
2942 local->scan_state = SCAN_SET_CHANNEL;
2943 local->scan_hw_mode = list_entry(local->modes_list.next,
2944 struct ieee80211_hw_mode,
2945 list);
2946 local->scan_channel_idx = 0;
2947 local->scan_dev = dev;
2948
4150c572
JB		 2949 netif_tx_lock_bh(local->mdev);
2950 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
2951 local->ops->configure_filter(local_to_hw(local),
2952 FIF_BCN_PRBRESP_PROMISC,
2953 &local->filter_flags,
2954 local->mdev->mc_count,
2955 local->mdev->mc_list);
2956 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 2957
2958 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2959 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2960 IEEE80211_CHANNEL_TIME);
2961
2962 return 0;
2963}
2964
2965
2966int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2967{
2968 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2969 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2970 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2971
2972 if (sdata->type != IEEE80211_IF_TYPE_STA)
2973 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2974
ece8eddd 2975 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 2976 if (local->scan_dev == dev)
2977 return 0;
2978 return -EBUSY;
2979 }
2980
a0af5f14
HS		 2981 ifsta->scan_ssid_len = ssid_len;
2982 if (ssid_len)
2983 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 2984 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2985 queue_work(local->hw.workqueue, &ifsta->work);
2986 return 0;
2987}
2988
2989static char *
2990ieee80211_sta_scan_result(struct net_device *dev,
2991 struct ieee80211_sta_bss *bss,
2992 char *current_ev, char *end_buf)
2993{
2994 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2995 struct iw_event iwe;
2996
2997 if (time_after(jiffies,
2998 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2999 return current_ev;
3000
3001 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3002 return current_ev;
3003
f0706e82
JB		 3004 memset(&iwe, 0, sizeof(iwe));
3005 iwe.cmd = SIOCGIWAP;
3006 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3007 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3008 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3009 IW_EV_ADDR_LEN);
3010
3011 memset(&iwe, 0, sizeof(iwe));
3012 iwe.cmd = SIOCGIWESSID;
3013 iwe.u.data.length = bss->ssid_len;
3014 iwe.u.data.flags = 1;
3015 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3016 bss->ssid);
3017
3018 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3019 memset(&iwe, 0, sizeof(iwe));
3020 iwe.cmd = SIOCGIWMODE;
3021 if (bss->capability & WLAN_CAPABILITY_ESS)
3022 iwe.u.mode = IW_MODE_MASTER;
3023 else
3024 iwe.u.mode = IW_MODE_ADHOC;
3025 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3026 IW_EV_UINT_LEN);
3027 }
3028
3029 memset(&iwe, 0, sizeof(iwe));
3030 iwe.cmd = SIOCGIWFREQ;
3031 iwe.u.freq.m = bss->channel;
3032 iwe.u.freq.e = 0;
3033 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3034 IW_EV_FREQ_LEN);
3035 iwe.u.freq.m = bss->freq * 100000;
3036 iwe.u.freq.e = 1;
3037 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3038 IW_EV_FREQ_LEN);
3039
3040 memset(&iwe, 0, sizeof(iwe));
3041 iwe.cmd = IWEVQUAL;
3042 iwe.u.qual.qual = bss->signal;
3043 iwe.u.qual.level = bss->rssi;
3044 iwe.u.qual.noise = bss->noise;
3045 iwe.u.qual.updated = local->wstats_flags;
3046 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3047 IW_EV_QUAL_LEN);
3048
3049 memset(&iwe, 0, sizeof(iwe));
3050 iwe.cmd = SIOCGIWENCODE;
3051 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3052 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3053 else
3054 iwe.u.data.flags = IW_ENCODE_DISABLED;
3055 iwe.u.data.length = 0;
3056 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3057
3058 if (bss && bss->wpa_ie) {
3059 memset(&iwe, 0, sizeof(iwe));
3060 iwe.cmd = IWEVGENIE;
3061 iwe.u.data.length = bss->wpa_ie_len;
3062 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3063 bss->wpa_ie);
3064 }
3065
3066 if (bss && bss->rsn_ie) {
3067 memset(&iwe, 0, sizeof(iwe));
3068 iwe.cmd = IWEVGENIE;
3069 iwe.u.data.length = bss->rsn_ie_len;
3070 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3071 bss->rsn_ie);
3072 }
3073
3074 if (bss && bss->supp_rates_len > 0) {
3075 /* display all supported rates in readable format */
3076 char *p = current_ev + IW_EV_LCP_LEN;
3077 int i;
3078
3079 memset(&iwe, 0, sizeof(iwe));
3080 iwe.cmd = SIOCGIWRATE;
3081 /* Those two flags are ignored... */
3082 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3083
3084 for (i = 0; i < bss->supp_rates_len; i++) {
3085 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3086 0x7f) * 500000);
3087 p = iwe_stream_add_value(current_ev, p,
3088 end_buf, &iwe, IW_EV_PARAM_LEN);
3089 }
3090 current_ev = p;
3091 }
3092
3093 if (bss) {
3094 char *buf;
3095 buf = kmalloc(30, GFP_ATOMIC);
3096 if (buf) {
3097 memset(&iwe, 0, sizeof(iwe));
3098 iwe.cmd = IWEVCUSTOM;
3099 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3100 iwe.u.data.length = strlen(buf);
3101 current_ev = iwe_stream_add_point(current_ev, end_buf,
3102 &iwe, buf);
3103 kfree(buf);
3104 }
3105 }
3106
3107 do {
3108 char *buf;
3109
f0706e82
JB		 3110 buf = kmalloc(100, GFP_ATOMIC);
3111 if (!buf)
3112 break;
3113
3114 memset(&iwe, 0, sizeof(iwe));
3115 iwe.cmd = IWEVCUSTOM;
3116 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3117 iwe.u.data.length = strlen(buf);
3118 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3119 buf);
3120
3121 memset(&iwe, 0, sizeof(iwe));
3122 iwe.cmd = IWEVCUSTOM;
3123 sprintf(buf, "capab=0x%04x", bss->capability);
3124 iwe.u.data.length = strlen(buf);
3125 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3126 buf);
3127
3128 kfree(buf);
3129 break;
3130 } while (0);
3131
3132 return current_ev;
3133}
3134
3135
3136int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3137{
3138 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3139 char *current_ev = buf;
3140 char *end_buf = buf + len;
3141 struct ieee80211_sta_bss *bss;
3142
3143 spin_lock_bh(&local->sta_bss_lock);
3144 list_for_each_entry(bss, &local->sta_bss_list, list) {
3145 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3146 spin_unlock_bh(&local->sta_bss_lock);
3147 return -E2BIG;
3148 }
3149 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3150 end_buf);
3151 }
3152 spin_unlock_bh(&local->sta_bss_lock);
3153 return current_ev - buf;
3154}
3155
3156
3157int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3158{
3159 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3160 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3161 kfree(ifsta->extra_ie);
3162 if (len == 0) {
3163 ifsta->extra_ie = NULL;
3164 ifsta->extra_ie_len = 0;
3165 return 0;
3166 }
3167 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3168 if (!ifsta->extra_ie) {
3169 ifsta->extra_ie_len = 0;
3170 return -ENOMEM;
3171 }
3172 memcpy(ifsta->extra_ie, ie, len);
3173 ifsta->extra_ie_len = len;
3174 return 0;
3175}
3176
3177
3178struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3179 struct sk_buff *skb, u8 *bssid,
3180 u8 *addr)
3181{
3182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3183 struct sta_info *sta;
91fa558b 3184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3185 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3186
3187 /* TODO: Could consider removing the least recently used entry and
3188 * allow new one to be added. */
3189 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3190 if (net_ratelimit()) {
3191 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3192 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3193 }
3194 return NULL;
3195 }
3196
0795af57 3197 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3198 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3199
3200 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3201 if (!sta)
3202 return NULL;
3203
3204 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3205
3206 rate_control_rate_init(sta, local);
3207
3208 return sta; /* caller will call sta_info_put() */
3209}
3210
3211
3212int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3213{
3214 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3215 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3216
3217 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3218 dev->name, reason);
3219
3220 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3221 sdata->type != IEEE80211_IF_TYPE_IBSS)
3222 return -EINVAL;
3223
3224 ieee80211_send_deauth(dev, ifsta, reason);
3225 ieee80211_set_disassoc(dev, ifsta, 1);
3226 return 0;
3227}
3228
3229
3230int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3231{
3232 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3233 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3234
3235 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3236 dev->name, reason);
3237
3238 if (sdata->type != IEEE80211_IF_TYPE_STA)
3239 return -EINVAL;
3240
d6f2da5b 3241 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3242 return -1;
3243
3244 ieee80211_send_disassoc(dev, ifsta, reason);
3245 ieee80211_set_disassoc(dev, ifsta, 0);
3246 return 0;
3247}
Linux 6.x block layer and io_uring tree(s)