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mac80211: remove useless 'ibss' parameter
[linux-block.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
17#include <linux/netdevice.h>
18#include <linux/if_arp.h>
19#include <linux/wireless.h>
20#include <linux/random.h>
21#include <linux/etherdevice.h>
d0709a65 22#include <linux/rtnetlink.h>
f0706e82 23#include <net/iw_handler.h>
f0706e82 24#include <net/mac80211.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f709fc69 29#include "mesh.h"
f0706e82 30
6042a3e3 31#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 32#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33#define IEEE80211_AUTH_MAX_TRIES 3
34#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35#define IEEE80211_ASSOC_MAX_TRIES 3
36#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
f709fc69 37#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
f0706e82
JB		 38#define IEEE80211_PROBE_INTERVAL (60 * HZ)
39#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40#define IEEE80211_SCAN_INTERVAL (2 * HZ)
41#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 42#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 43
f0706e82
JB		 44#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
45#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 46#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 47
48#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49
50
5484e237
JB		 51/* utils */
52static int ecw2cw(int ecw)
60f8b39c 53{
5484e237 54 return (1 << ecw) - 1;
60f8b39c
JB		 55}
56
57static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
43ac2ca3
JM		 58{
59 u8 *end, *pos;
60
61 pos = bss->ies;
62 if (pos == NULL)
63 return NULL;
64 end = pos + bss->ies_len;
65
66 while (pos + 1 < end) {
67 if (pos + 2 + pos[1] > end)
68 break;
69 if (pos[0] == ie)
70 return pos;
71 pos += 2 + pos[1];
72 }
73
74 return NULL;
75}
76
60f8b39c
JB		 77/* frame sending functions */
78void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
79 int encrypt)
80{
81 skb->dev = sdata->local->mdev;
82 skb_set_mac_header(skb, 0);
83 skb_set_network_header(skb, 0);
84 skb_set_transport_header(skb, 0);
e2839d8f 85
60f8b39c
JB		 86 skb->iif = sdata->dev->ifindex;
87 skb->do_not_encrypt = !encrypt;
88
89 dev_queue_xmit(skb);
90}
91
92static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
93 struct ieee80211_if_sta *ifsta,
94 int transaction, u8 *extra, size_t extra_len,
95 int encrypt)
96{
97 struct ieee80211_local *local = sdata->local;
98 struct sk_buff *skb;
99 struct ieee80211_mgmt *mgmt;
100
101 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
102 sizeof(*mgmt) + 6 + extra_len);
103 if (!skb) {
104 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
105 "frame\n", sdata->dev->name);
106 return;
107 }
108 skb_reserve(skb, local->hw.extra_tx_headroom);
109
110 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
111 memset(mgmt, 0, 24 + 6);
112 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
113 IEEE80211_STYPE_AUTH);
114 if (encrypt)
115 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
116 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
117 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
118 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
119 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
120 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
121 ifsta->auth_transaction = transaction + 1;
122 mgmt->u.auth.status_code = cpu_to_le16(0);
123 if (extra)
124 memcpy(skb_put(skb, extra_len), extra, extra_len);
125
126 ieee80211_sta_tx(sdata, skb, encrypt);
127}
128
0a51b27e
JB		 129void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
130 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 131{
132 struct ieee80211_local *local = sdata->local;
133 struct ieee80211_supported_band *sband;
134 struct sk_buff *skb;
135 struct ieee80211_mgmt *mgmt;
136 u8 *pos, *supp_rates, *esupp_rates = NULL;
137 int i;
138
139 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
140 if (!skb) {
141 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
142 "request\n", sdata->dev->name);
143 return;
144 }
145 skb_reserve(skb, local->hw.extra_tx_headroom);
146
147 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
148 memset(mgmt, 0, 24);
149 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
150 IEEE80211_STYPE_PROBE_REQ);
151 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
152 if (dst) {
153 memcpy(mgmt->da, dst, ETH_ALEN);
154 memcpy(mgmt->bssid, dst, ETH_ALEN);
155 } else {
156 memset(mgmt->da, 0xff, ETH_ALEN);
157 memset(mgmt->bssid, 0xff, ETH_ALEN);
158 }
159 pos = skb_put(skb, 2 + ssid_len);
160 *pos++ = WLAN_EID_SSID;
161 *pos++ = ssid_len;
162 memcpy(pos, ssid, ssid_len);
163
164 supp_rates = skb_put(skb, 2);
165 supp_rates[0] = WLAN_EID_SUPP_RATES;
166 supp_rates[1] = 0;
167 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
168
169 for (i = 0; i < sband->n_bitrates; i++) {
170 struct ieee80211_rate *rate = &sband->bitrates[i];
171 if (esupp_rates) {
172 pos = skb_put(skb, 1);
173 esupp_rates[1]++;
174 } else if (supp_rates[1] == 8) {
175 esupp_rates = skb_put(skb, 3);
176 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
177 esupp_rates[1] = 1;
178 pos = &esupp_rates[2];
179 } else {
180 pos = skb_put(skb, 1);
181 supp_rates[1]++;
182 }
183 *pos = rate->bitrate / 5;
184 }
185
186 ieee80211_sta_tx(sdata, skb, 0);
187}
188
189/* MLME */
f698d856 190static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
b079ada7 191 struct ieee80211_sta_bss *bss)
e2839d8f 192{
e2839d8f
VK		 193 struct ieee80211_local *local = sdata->local;
194 int i, have_higher_than_11mbit = 0;
195
196
197 /* cf. IEEE 802.11 9.2.12 */
198 for (i = 0; i < bss->supp_rates_len; i++)
199 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
200 have_higher_than_11mbit = 1;
201
202 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
203 have_higher_than_11mbit)
204 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
205 else
206 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
207
208
209 if (local->ops->conf_tx) {
210 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 211
212 memset(&qparam, 0, sizeof(qparam));
213
214 qparam.aifs = 2;
215
216 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
217 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
218 qparam.cw_min = 31;
219 else
220 qparam.cw_min = 15;
221
222 qparam.cw_max = 1023;
223 qparam.txop = 0;
224
e100bb64
JB		 225 for (i = 0; i < local_to_hw(local)->queues; i++)
226 local->ops->conf_tx(local_to_hw(local), i, &qparam);
e2839d8f
VK		 227 }
228}
229
f698d856 230static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 231 struct ieee80211_if_sta *ifsta,
232 u8 *wmm_param, size_t wmm_param_len)
233{
f0706e82
JB		 234 struct ieee80211_tx_queue_params params;
235 size_t left;
236 int count;
237 u8 *pos;
238
3434fbd3
JB		 239 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
240 return;
241
242 if (!wmm_param)
243 return;
244
f0706e82
JB		 245 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
246 return;
247 count = wmm_param[6] & 0x0f;
248 if (count == ifsta->wmm_last_param_set)
249 return;
250 ifsta->wmm_last_param_set = count;
251
252 pos = wmm_param + 8;
253 left = wmm_param_len - 8;
254
255 memset(&params, 0, sizeof(params));
256
257 if (!local->ops->conf_tx)
258 return;
259
260 local->wmm_acm = 0;
261 for (; left >= 4; left -= 4, pos += 4) {
262 int aci = (pos[0] >> 5) & 0x03;
263 int acm = (pos[0] >> 4) & 0x01;
264 int queue;
265
266 switch (aci) {
267 case 1:
e100bb64 268 queue = 3;
988c0f72 269 if (acm)
f0706e82 270 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 271 break;
272 case 2:
e100bb64 273 queue = 1;
988c0f72 274 if (acm)
f0706e82 275 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 276 break;
277 case 3:
e100bb64 278 queue = 0;
988c0f72 279 if (acm)
f0706e82 280 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 281 break;
282 case 0:
283 default:
e100bb64 284 queue = 2;
988c0f72 285 if (acm)
f0706e82 286 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 287 break;
288 }
289
290 params.aifs = pos[0] & 0x0f;
291 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
292 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 293 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 294#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 295 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 296 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 297 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 298 params.cw_max, params.txop);
299#endif
f0706e82
JB		 300 /* TODO: handle ACM (block TX, fallback to next lowest allowed
301 * AC for now) */
302 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
303 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 304 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 305 }
306 }
307}
308
50c4afb9
JL		 309static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
310 bool use_protection,
311 bool use_short_preamble)
5628221c 312{
471b3efd 313 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 314#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 315 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 316 DECLARE_MAC_BUF(mac);
ebd74487 317#endif
471b3efd 318 u32 changed = 0;
5628221c 319
471b3efd 320 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 321#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 322 if (net_ratelimit()) {
323 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 324 "%s)\n",
471b3efd 325 sdata->dev->name,
5628221c 326 use_protection ? "enabled" : "disabled",
0795af57 327 print_mac(mac, ifsta->bssid));
5628221c 328 }
f4ea83dd 329#endif
471b3efd
JB		 330 bss_conf->use_cts_prot = use_protection;
331 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 332 }
7e9ed188 333
d43c7b37 334 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 335#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 336 if (net_ratelimit()) {
337 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 338 " (BSSID=%s)\n",
471b3efd 339 sdata->dev->name,
d43c7b37 340 use_short_preamble ? "short" : "long",
0795af57 341 print_mac(mac, ifsta->bssid));
7e9ed188 342 }
f4ea83dd 343#endif
d43c7b37 344 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 345 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 346 }
d9430a32 347
471b3efd 348 return changed;
5628221c
DD		 349}
350
50c4afb9
JL		 351static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
352 u8 erp_value)
353{
354 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
355 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
356
357 return ieee80211_handle_protect_preamb(sdata,
358 use_protection, use_short_preamble);
359}
360
361static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
362 struct ieee80211_sta_bss *bss)
363{
364 u32 changed = 0;
365
366 if (bss->has_erp_value)
367 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
368 else {
369 u16 capab = bss->capability;
370 changed |= ieee80211_handle_protect_preamb(sdata, false,
371 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
372 }
373
374 return changed;
375}
376
f5e5bf25
TW		 377static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
378 struct ieee80211_if_sta *ifsta)
379{
380 union iwreq_data wrqu;
381 memset(&wrqu, 0, sizeof(wrqu));
382 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
383 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
384 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
385 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
386}
387
f698d856 388static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 389 struct ieee80211_if_sta *ifsta)
390{
f0706e82
JB		 391 union iwreq_data wrqu;
392
f0706e82 393 if (ifsta->assocreq_ies) {
087d833e
JM		 394 memset(&wrqu, 0, sizeof(wrqu));
395 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 396 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 397 ifsta->assocreq_ies);
f0706e82 398 }
087d833e
JM		 399 if (ifsta->assocresp_ies) {
400 memset(&wrqu, 0, sizeof(wrqu));
401 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 402 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 403 ifsta->assocresp_ies);
f0706e82 404 }
f0706e82
JB		 405}
406
407
f698d856 408static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 409 struct ieee80211_if_sta *ifsta)
f0706e82 410{
471b3efd 411 struct ieee80211_local *local = sdata->local;
38668c05 412 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 413 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 414
f5e5bf25 415 struct ieee80211_sta_bss *bss;
d6f2da5b 416
f5e5bf25 417 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 418
f5e5bf25
TW		 419 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
420 return;
21c0cbe7 421
f5e5bf25
TW		 422 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
423 conf->channel->center_freq,
424 ifsta->ssid, ifsta->ssid_len);
425 if (bss) {
426 /* set timing information */
427 sdata->bss_conf.beacon_int = bss->beacon_int;
428 sdata->bss_conf.timestamp = bss->timestamp;
429 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 430
f5e5bf25 431 changed |= ieee80211_handle_bss_capability(sdata, bss);
5628221c 432
f5e5bf25
TW		 433 ieee80211_rx_bss_put(local, bss);
434 }
38668c05 435
f5e5bf25
TW		 436 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
437 changed |= BSS_CHANGED_HT;
438 sdata->bss_conf.assoc_ht = 1;
439 sdata->bss_conf.ht_conf = &conf->ht_conf;
440 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
441 }
38668c05 442
f5e5bf25
TW		 443 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
444 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
445 ieee80211_sta_send_associnfo(sdata, ifsta);
38668c05 446
f0706e82 447 ifsta->last_probe = jiffies;
f5e5bf25 448 ieee80211_led_assoc(local, 1);
471b3efd 449
f5e5bf25 450 sdata->bss_conf.assoc = 1;
471b3efd 451 ieee80211_bss_info_change_notify(sdata, changed);
8db9369f 452
24e64622 453 netif_tx_start_all_queues(sdata->dev);
f5e5bf25 454 netif_carrier_on(sdata->dev);
8db9369f 455
f5e5bf25 456 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 457}
458
9859b81e
RR		 459static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
460 struct ieee80211_if_sta *ifsta)
461{
462 DECLARE_MAC_BUF(mac);
463
464 ifsta->direct_probe_tries++;
465 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
466 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
467 sdata->dev->name, print_mac(mac, ifsta->bssid));
468 ifsta->state = IEEE80211_STA_MLME_DISABLED;
469 return;
470 }
471
472 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
473 sdata->dev->name, print_mac(mac, ifsta->bssid),
474 ifsta->direct_probe_tries);
475
476 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
477
478 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
479
480 /* Direct probe is sent to broadcast address as some APs
481 * will not answer to direct packet in unassociated state.
482 */
483 ieee80211_send_probe_req(sdata, NULL,
484 ifsta->ssid, ifsta->ssid_len);
485
486 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
487}
488
f0706e82 489
f698d856 490static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 491 struct ieee80211_if_sta *ifsta)
492{
0795af57
JP		 493 DECLARE_MAC_BUF(mac);
494
f0706e82
JB		 495 ifsta->auth_tries++;
496 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 497 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 498 " timed out\n",
f698d856 499 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 500 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 501 return;
502 }
503
48c2fc59 504 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0795af57 505 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
f698d856 506 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 507
f698d856 508 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
f0706e82
JB		 509
510 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
511}
512
36d16ae7
HS		 513static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
514 struct ieee80211_supported_band *sband,
515 u64 *rates)
516{
517 int i, j, count;
518 *rates = 0;
519 count = 0;
520 for (i = 0; i < bss->supp_rates_len; i++) {
521 int rate = (bss->supp_rates[i] & 0x7F) * 5;
522
523 for (j = 0; j < sband->n_bitrates; j++)
524 if (sband->bitrates[j].bitrate == rate) {
525 *rates |= BIT(j);
526 count++;
527 break;
528 }
529 }
530
531 return count;
532}
f0706e82 533
f698d856 534static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 535 struct ieee80211_if_sta *ifsta)
536{
f698d856 537 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 538 struct sk_buff *skb;
539 struct ieee80211_mgmt *mgmt;
43ac2ca3 540 u8 *pos, *ies, *ht_add_ie;
36d16ae7 541 int i, len, count, rates_len, supp_rates_len;
f0706e82
JB		 542 u16 capab;
543 struct ieee80211_sta_bss *bss;
544 int wmm = 0;
8318d78a 545 struct ieee80211_supported_band *sband;
36d16ae7 546 u64 rates = 0;
f0706e82
JB		 547
548 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
549 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
550 ifsta->ssid_len);
551 if (!skb) {
552 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
f698d856 553 "frame\n", sdata->dev->name);
f0706e82
JB		 554 return;
555 }
556 skb_reserve(skb, local->hw.extra_tx_headroom);
557
8318d78a
JB		 558 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
559
f0706e82 560 capab = ifsta->capab;
8318d78a
JB		 561
562 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
563 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
564 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
565 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
566 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 567 }
8318d78a 568
f698d856 569 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 570 local->hw.conf.channel->center_freq,
cffdd30d 571 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 572 if (bss) {
573 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
574 capab |= WLAN_CAPABILITY_PRIVACY;
43ac2ca3 575 if (bss->wmm_used)
f0706e82 576 wmm = 1;
0d580a77
HS		 577
578 /* get all rates supported by the device and the AP as
579 * some APs don't like getting a superset of their rates
580 * in the association request (e.g. D-Link DAP 1353 in
581 * b-only mode) */
582 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
583
06ff47bc
TW		 584 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
585 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
586 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
587
3e122be0 588 ieee80211_rx_bss_put(local, bss);
0d580a77
HS		 589 } else {
590 rates = ~0;
591 rates_len = sband->n_bitrates;
f0706e82
JB		 592 }
593
594 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
595 memset(mgmt, 0, 24);
596 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 597 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 598 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
599
d6f2da5b 600 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82 601 skb_put(skb, 10);
e7827a70
HH		 602 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
603 IEEE80211_STYPE_REASSOC_REQ);
f0706e82 604 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 605 mgmt->u.reassoc_req.listen_interval =
606 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 607 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
608 ETH_ALEN);
609 } else {
610 skb_put(skb, 4);
e7827a70
HH		 611 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
612 IEEE80211_STYPE_ASSOC_REQ);
f0706e82 613 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 614 mgmt->u.reassoc_req.listen_interval =
615 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 616 }
617
618 /* SSID */
619 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
620 *pos++ = WLAN_EID_SSID;
621 *pos++ = ifsta->ssid_len;
622 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
623
0d580a77 624 /* add all rates which were marked to be used above */
36d16ae7
HS		 625 supp_rates_len = rates_len;
626 if (supp_rates_len > 8)
627 supp_rates_len = 8;
628
8318d78a 629 len = sband->n_bitrates;
36d16ae7 630 pos = skb_put(skb, supp_rates_len + 2);
f0706e82 631 *pos++ = WLAN_EID_SUPP_RATES;
36d16ae7 632 *pos++ = supp_rates_len;
f0706e82 633
36d16ae7
HS		 634 count = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if (BIT(i) & rates) {
8318d78a 637 int rate = sband->bitrates[i].bitrate;
f0706e82 638 *pos++ = (u8) (rate / 5);
36d16ae7
HS		 639 if (++count == 8)
640 break;
641 }
642 }
643
8ab65b03 644 if (rates_len > count) {
36d16ae7
HS		 645 pos = skb_put(skb, rates_len - count + 2);
646 *pos++ = WLAN_EID_EXT_SUPP_RATES;
647 *pos++ = rates_len - count;
648
649 for (i++; i < sband->n_bitrates; i++) {
650 if (BIT(i) & rates) {
651 int rate = sband->bitrates[i].bitrate;
652 *pos++ = (u8) (rate / 5);
653 }
f0706e82
JB		 654 }
655 }
656
06ff47bc
TW		 657 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
658 /* 1. power capabilities */
659 pos = skb_put(skb, 4);
660 *pos++ = WLAN_EID_PWR_CAPABILITY;
661 *pos++ = 2;
662 *pos++ = 0; /* min tx power */
663 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
664
665 /* 2. supported channels */
666 /* TODO: get this in reg domain format */
667 pos = skb_put(skb, 2 * sband->n_channels + 2);
668 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
669 *pos++ = 2 * sband->n_channels;
670 for (i = 0; i < sband->n_channels; i++) {
671 *pos++ = ieee80211_frequency_to_channel(
672 sband->channels[i].center_freq);
673 *pos++ = 1; /* one channel in the subband*/
674 }
675 }
676
f0706e82
JB		 677 if (ifsta->extra_ie) {
678 pos = skb_put(skb, ifsta->extra_ie_len);
679 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
680 }
681
d6f2da5b 682 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 683 pos = skb_put(skb, 9);
684 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
685 *pos++ = 7; /* len */
686 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
687 *pos++ = 0x50;
688 *pos++ = 0xf2;
689 *pos++ = 2; /* WME */
690 *pos++ = 0; /* WME info */
691 *pos++ = 1; /* WME ver */
692 *pos++ = 0;
693 }
3434fbd3 694
c7153508 695 /* wmm support is a must to HT */
3434fbd3 696 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
43ac2ca3
JM		 697 sband->ht_info.ht_supported &&
698 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
9306102e 699 struct ieee80211_ht_addt_info *ht_add_info =
43ac2ca3 700 (struct ieee80211_ht_addt_info *)ht_add_ie;
9306102e
EG		 701 u16 cap = sband->ht_info.cap;
702 __le16 tmp;
703 u32 flags = local->hw.conf.channel->flags;
704
705 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
706 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
707 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
708 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
709 cap &= ~IEEE80211_HT_CAP_SGI_40;
710 }
711 break;
712 case IEEE80211_HT_IE_CHA_SEC_BELOW:
713 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
714 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
715 cap &= ~IEEE80211_HT_CAP_SGI_40;
716 }
717 break;
718 }
719
720 tmp = cpu_to_le16(cap);
c7153508
RR		 721 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
722 *pos++ = WLAN_EID_HT_CAPABILITY;
723 *pos++ = sizeof(struct ieee80211_ht_cap);
724 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
725 memcpy(pos, &tmp, sizeof(u16));
726 pos += sizeof(u16);
8318d78a
JB		 727 /* TODO: needs a define here for << 2 */
728 *pos++ = sband->ht_info.ampdu_factor |
729 (sband->ht_info.ampdu_density << 2);
730 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 731 }
f0706e82
JB		 732
733 kfree(ifsta->assocreq_ies);
734 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 735 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 736 if (ifsta->assocreq_ies)
737 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
738
f698d856 739 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 740}
741
742
f698d856 743static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 744 struct ieee80211_if_sta *ifsta, u16 reason)
745{
f698d856 746 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 747 struct sk_buff *skb;
748 struct ieee80211_mgmt *mgmt;
749
750 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
751 if (!skb) {
752 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
f698d856 753 "frame\n", sdata->dev->name);
f0706e82
JB		 754 return;
755 }
756 skb_reserve(skb, local->hw.extra_tx_headroom);
757
758 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
759 memset(mgmt, 0, 24);
760 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 761 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 762 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 763 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
764 IEEE80211_STYPE_DEAUTH);
f0706e82
JB		 765 skb_put(skb, 2);
766 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
767
f698d856 768 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 769}
770
60f8b39c
JB		 771static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
772{
773 if (!sdata || !sdata->default_key ||
774 sdata->default_key->conf.alg != ALG_WEP)
775 return 0;
776 return 1;
777}
f0706e82 778
f698d856 779static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 780 struct ieee80211_if_sta *ifsta, u16 reason)
781{
f698d856 782 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 783 struct sk_buff *skb;
784 struct ieee80211_mgmt *mgmt;
785
786 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
787 if (!skb) {
788 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
f698d856 789 "frame\n", sdata->dev->name);
f0706e82
JB		 790 return;
791 }
792 skb_reserve(skb, local->hw.extra_tx_headroom);
793
794 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
795 memset(mgmt, 0, 24);
796 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 797 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 798 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 799 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
800 IEEE80211_STYPE_DISASSOC);
f0706e82
JB		 801 skb_put(skb, 2);
802 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
803
f698d856 804 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 805}
806
aa458d17
TW		 807static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
808 struct ieee80211_if_sta *ifsta, bool deauth,
809 bool self_disconnected, u16 reason)
810{
811 struct ieee80211_local *local = sdata->local;
812 struct sta_info *sta;
f5e5bf25 813 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 814
815 rcu_read_lock();
816
817 sta = sta_info_get(local, ifsta->bssid);
818 if (!sta) {
819 rcu_read_unlock();
820 return;
821 }
822
823 if (deauth) {
824 ifsta->direct_probe_tries = 0;
825 ifsta->auth_tries = 0;
826 }
827 ifsta->assoc_scan_tries = 0;
828 ifsta->assoc_tries = 0;
829
24e64622 830 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 831 netif_carrier_off(sdata->dev);
832
833 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
834
835 if (self_disconnected) {
836 if (deauth)
837 ieee80211_send_deauth(sdata, ifsta, reason);
838 else
839 ieee80211_send_disassoc(sdata, ifsta, reason);
840 }
841
f5e5bf25
TW		 842 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
843 changed |= ieee80211_reset_erp_info(sdata);
844
845 if (sdata->bss_conf.assoc_ht)
846 changed |= BSS_CHANGED_HT;
847
848 sdata->bss_conf.assoc_ht = 0;
849 sdata->bss_conf.ht_conf = NULL;
850 sdata->bss_conf.ht_bss_conf = NULL;
851
852 ieee80211_led_assoc(local, 0);
853 sdata->bss_conf.assoc = 0;
854
855 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 856
857 if (self_disconnected)
858 ifsta->state = IEEE80211_STA_MLME_DISABLED;
859
860 sta_info_unlink(&sta);
861
862 rcu_read_unlock();
863
864 sta_info_destroy(sta);
865}
f0706e82 866
f698d856 867static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 868 struct ieee80211_if_sta *ifsta)
869{
f698d856 870 struct ieee80211_local *local = sdata->local;
f0706e82 871 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 872 int bss_privacy;
873 int wep_privacy;
874 int privacy_invoked;
f0706e82 875
5b98b1f7 876 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 877 return 0;
878
f698d856 879 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 880 local->hw.conf.channel->center_freq,
cffdd30d 881 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 882 if (!bss)
883 return 0;
884
5b98b1f7 885 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 886 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 887 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 888
3e122be0 889 ieee80211_rx_bss_put(local, bss);
f0706e82 890
5b98b1f7
JB		 891 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
892 return 0;
893
894 return 1;
f0706e82
JB		 895}
896
f698d856 897static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 898 struct ieee80211_if_sta *ifsta)
899{
0795af57
JP		 900 DECLARE_MAC_BUF(mac);
901
f0706e82
JB		 902 ifsta->assoc_tries++;
903 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 904 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 905 " timed out\n",
f698d856 906 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 907 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 908 return;
909 }
910
48c2fc59 911 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 912 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 913 sdata->dev->name, print_mac(mac, ifsta->bssid));
914 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 915 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 916 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 917 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 918 return;
919 }
920
f698d856 921 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 922
923 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
924}
925
926
f698d856 927static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 928 struct ieee80211_if_sta *ifsta)
929{
f698d856 930 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 931 struct sta_info *sta;
932 int disassoc;
0795af57 933 DECLARE_MAC_BUF(mac);
f0706e82
JB		 934
935 /* TODO: start monitoring current AP signal quality and number of
936 * missed beacons. Scan other channels every now and then and search
937 * for better APs. */
938 /* TODO: remove expired BSSes */
939
48c2fc59 940 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 941
d0709a65
JB		 942 rcu_read_lock();
943
f0706e82
JB		 944 sta = sta_info_get(local, ifsta->bssid);
945 if (!sta) {
0795af57 946 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 947 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 948 disassoc = 1;
949 } else {
950 disassoc = 0;
951 if (time_after(jiffies,
952 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 953 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 954 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 955 "current AP %s - assume out of "
f0706e82 956 "range\n",
f698d856 957 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 958 disassoc = 1;
d6f2da5b 959 } else
f698d856 960 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 961 local->scan_ssid,
962 local->scan_ssid_len);
d6f2da5b 963 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 964 } else {
d6f2da5b 965 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 966 if (time_after(jiffies, ifsta->last_probe +
967 IEEE80211_PROBE_INTERVAL)) {
968 ifsta->last_probe = jiffies;
f698d856 969 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 970 ifsta->ssid,
971 ifsta->ssid_len);
972 }
973 }
f0706e82 974 }
d0709a65
JB		 975
976 rcu_read_unlock();
977
60f8b39c
JB		 978 if (disassoc)
979 ieee80211_set_disassoc(sdata, ifsta, true, true,
980 WLAN_REASON_PREV_AUTH_NOT_VALID);
981 else
982 mod_timer(&ifsta->timer, jiffies +
983 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 984}
985
986
f698d856 987static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 988 struct ieee80211_if_sta *ifsta)
989{
f698d856 990 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 991 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 992 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 993}
994
995
f698d856 996static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 997 struct ieee80211_if_sta *ifsta,
998 struct ieee80211_mgmt *mgmt,
999 size_t len)
1000{
1001 u8 *pos;
1002 struct ieee802_11_elems elems;
1003
f0706e82 1004 pos = mgmt->u.auth.variable;
67a4cce4 1005 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1006 if (!elems.challenge)
f0706e82 1007 return;
f698d856 1008 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1009 elems.challenge_len + 2, 1);
1010}
1011
f698d856 1012static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
9f985b0e
RR		 1013 u8 dialog_token, u16 status, u16 policy,
1014 u16 buf_size, u16 timeout)
1015{
9f985b0e 1016 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 1017 struct ieee80211_local *local = sdata->local;
9f985b0e
RR		 1018 struct sk_buff *skb;
1019 struct ieee80211_mgmt *mgmt;
1020 u16 capab;
1021
3acea5b6
EK		 1022 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1023
9f985b0e
RR		 1024 if (!skb) {
1025 printk(KERN_DEBUG "%s: failed to allocate buffer "
f698d856 1026 "for addba resp frame\n", sdata->dev->name);
9f985b0e
RR		 1027 return;
1028 }
1029
1030 skb_reserve(skb, local->hw.extra_tx_headroom);
1031 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1032 memset(mgmt, 0, 24);
1033 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1034 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1035 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1036 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
9f985b0e
RR		 1037 else
1038 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1039 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1040 IEEE80211_STYPE_ACTION);
9f985b0e
RR		 1041
1042 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1043 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1044 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1045 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1046
1047 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1048 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1049 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1050
1051 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1052 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1053 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1054
f698d856 1055 ieee80211_sta_tx(sdata, skb, 0);
9f985b0e
RR		 1056
1057 return;
1058}
1059
60f8b39c
JB		 1060/*
1061 * After accepting the AddBA Request we activated a timer,
1062 * resetting it after each frame that arrives from the originator.
1063 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1064 */
1065static void sta_rx_agg_session_timer_expired(unsigned long data)
1066{
1067 /* not an elegant detour, but there is no choice as the timer passes
1068 * only one argument, and various sta_info are needed here, so init
1069 * flow in sta_info_create gives the TID as data, while the timer_to_id
1070 * array gives the sta through container_of */
1071 u8 *ptid = (u8 *)data;
1072 u8 *timer_to_id = ptid - *ptid;
1073 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1074 timer_to_tid[0]);
1075
1076#ifdef CONFIG_MAC80211_HT_DEBUG
1077 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1078#endif
1079 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1080 (u16)*ptid, WLAN_BACK_TIMER,
1081 WLAN_REASON_QSTA_TIMEOUT);
1082}
1083
f698d856 1084static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
9f985b0e
RR		 1085 struct ieee80211_mgmt *mgmt,
1086 size_t len)
1087{
07db2183
RR		 1088 struct ieee80211_hw *hw = &local->hw;
1089 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1090 struct sta_info *sta;
07db2183
RR		 1091 struct tid_ampdu_rx *tid_agg_rx;
1092 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1093 u8 dialog_token;
07db2183
RR		 1094 int ret = -EOPNOTSUPP;
1095 DECLARE_MAC_BUF(mac);
9f985b0e 1096
d0709a65
JB		 1097 rcu_read_lock();
1098
9f985b0e 1099 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1100 if (!sta) {
1101 rcu_read_unlock();
9f985b0e 1102 return;
d0709a65 1103 }
9f985b0e
RR		 1104
1105 /* extract session parameters from addba request frame */
1106 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1107 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1108 start_seq_num =
1109 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1110
1111 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1112 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1113 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1114 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1115
9f985b0e
RR		 1116 status = WLAN_STATUS_REQUEST_DECLINED;
1117
07db2183
RR		 1118 /* sanity check for incoming parameters:
1119 * check if configuration can support the BA policy
1120 * and if buffer size does not exceeds max value */
1121 if (((ba_policy != 1)
1122 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1123 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1124 status = WLAN_STATUS_INVALID_QOS_PARAM;
1125#ifdef CONFIG_MAC80211_HT_DEBUG
1126 if (net_ratelimit())
7b9d44cd 1127 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1128 "%s on tid %u. policy %d, buffer size %d\n",
1129 print_mac(mac, mgmt->sa), tid, ba_policy,
1130 buf_size);
1131#endif /* CONFIG_MAC80211_HT_DEBUG */
1132 goto end_no_lock;
1133 }
1134 /* determine default buffer size */
1135 if (buf_size == 0) {
8318d78a
JB		 1136 struct ieee80211_supported_band *sband;
1137
1138 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1139 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1140 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1141 }
1142
07db2183
RR		 1143
1144 /* examine state machine */
07346f81 1145 spin_lock_bh(&sta->lock);
07db2183 1146
cee24a3e 1147 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1148#ifdef CONFIG_MAC80211_HT_DEBUG
1149 if (net_ratelimit())
7b9d44cd 1150 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1151 "%s on tid %u\n",
1152 print_mac(mac, mgmt->sa), tid);
1153#endif /* CONFIG_MAC80211_HT_DEBUG */
1154 goto end;
1155 }
1156
cee24a3e
RR		 1157 /* prepare A-MPDU MLME for Rx aggregation */
1158 sta->ampdu_mlme.tid_rx[tid] =
1159 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1160 if (!sta->ampdu_mlme.tid_rx[tid]) {
f4ea83dd 1161#ifdef CONFIG_MAC80211_HT_DEBUG
cee24a3e
RR		 1162 if (net_ratelimit())
1163 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1164 tid);
f4ea83dd 1165#endif
cee24a3e
RR		 1166 goto end;
1167 }
1168 /* rx timer */
1169 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1170 sta_rx_agg_session_timer_expired;
1171 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1172 (unsigned long)&sta->timer_to_tid[tid];
1173 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1174
1175 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1176
07db2183
RR		 1177 /* prepare reordering buffer */
1178 tid_agg_rx->reorder_buf =
c97c23e3 1179 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
03147dfc 1180 if (!tid_agg_rx->reorder_buf) {
f4ea83dd 1181#ifdef CONFIG_MAC80211_HT_DEBUG
03147dfc
JB		 1182 if (net_ratelimit())
1183 printk(KERN_ERR "can not allocate reordering buffer "
1184 "to tid %d\n", tid);
f4ea83dd 1185#endif
cee24a3e 1186 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1187 goto end;
1188 }
1189 memset(tid_agg_rx->reorder_buf, 0,
c97c23e3 1190 buf_size * sizeof(struct sk_buff *));
07db2183
RR		 1191
1192 if (local->ops->ampdu_action)
1193 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1194 sta->addr, tid, &start_seq_num);
07db2183 1195#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1196 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1197#endif /* CONFIG_MAC80211_HT_DEBUG */
1198
1199 if (ret) {
1200 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1201 kfree(tid_agg_rx);
1202 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1203 goto end;
1204 }
1205
1206 /* change state and send addba resp */
cee24a3e 1207 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1208 tid_agg_rx->dialog_token = dialog_token;
1209 tid_agg_rx->ssn = start_seq_num;
1210 tid_agg_rx->head_seq_num = start_seq_num;
1211 tid_agg_rx->buf_size = buf_size;
1212 tid_agg_rx->timeout = timeout;
1213 tid_agg_rx->stored_mpdu_num = 0;
1214 status = WLAN_STATUS_SUCCESS;
1215end:
07346f81 1216 spin_unlock_bh(&sta->lock);
07db2183
RR		 1217
1218end_no_lock:
f698d856 1219 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
d0709a65
JB		 1220 dialog_token, status, 1, buf_size, timeout);
1221 rcu_read_unlock();
9f985b0e 1222}
f0706e82 1223
f698d856 1224static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
eadc8d9e
RR		 1225 struct ieee80211_mgmt *mgmt,
1226 size_t len)
1227{
eadc8d9e
RR		 1228 struct ieee80211_hw *hw = &local->hw;
1229 struct sta_info *sta;
1230 u16 capab;
1231 u16 tid;
1232 u8 *state;
1233
d0709a65
JB		 1234 rcu_read_lock();
1235
eadc8d9e 1236 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1237 if (!sta) {
1238 rcu_read_unlock();
eadc8d9e 1239 return;
d0709a65 1240 }
eadc8d9e
RR		 1241
1242 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1243 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1244
cee24a3e 1245 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1246
07346f81 1247 spin_lock_bh(&sta->lock);
eadc8d9e 1248
cee24a3e 1249 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1250 spin_unlock_bh(&sta->lock);
cee24a3e
RR		 1251 goto addba_resp_exit;
1252 }
1253
eadc8d9e 1254 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1255 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
07346f81 1256 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1257#ifdef CONFIG_MAC80211_HT_DEBUG
1258 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1259#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1260 goto addba_resp_exit;
eadc8d9e
RR		 1261 }
1262
cee24a3e 1263 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1264#ifdef CONFIG_MAC80211_HT_DEBUG
1265 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1266#endif /* CONFIG_MAC80211_HT_DEBUG */
1267 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1268 == WLAN_STATUS_SUCCESS) {
eadc8d9e 1269 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1270 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e 1271
f4ea83dd 1272 if (*state == HT_AGG_STATE_OPERATIONAL)
eadc8d9e 1273 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
eadc8d9e 1274
07346f81 1275 spin_unlock_bh(&sta->lock);
eadc8d9e 1276 } else {
cee24a3e 1277 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1278 /* this will allow the state check in stop_BA_session */
1279 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1280 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1281 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1282 WLAN_BACK_INITIATOR);
1283 }
cee24a3e
RR		 1284
1285addba_resp_exit:
d0709a65 1286 rcu_read_unlock();
eadc8d9e
RR		 1287}
1288
f698d856 1289static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
688b88a4
RR		 1290 struct ieee80211_mgmt *mgmt, size_t len)
1291{
f698d856 1292 struct ieee80211_local *local = sdata->local;
688b88a4
RR		 1293 struct sta_info *sta;
1294 u16 tid, params;
1295 u16 initiator;
1296 DECLARE_MAC_BUF(mac);
1297
d0709a65
JB		 1298 rcu_read_lock();
1299
688b88a4 1300 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1301 if (!sta) {
1302 rcu_read_unlock();
688b88a4 1303 return;
d0709a65 1304 }
688b88a4
RR		 1305
1306 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1307 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1308 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1309
1310#ifdef CONFIG_MAC80211_HT_DEBUG
1311 if (net_ratelimit())
d92684e6
RR		 1312 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1313 print_mac(mac, mgmt->sa),
2e354ed7 1314 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1315 mgmt->u.action.u.delba.reason_code);
1316#endif /* CONFIG_MAC80211_HT_DEBUG */
1317
1318 if (initiator == WLAN_BACK_INITIATOR)
f698d856 1319 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
688b88a4 1320 WLAN_BACK_INITIATOR, 0);
d92684e6 1321 else { /* WLAN_BACK_RECIPIENT */
07346f81 1322 spin_lock_bh(&sta->lock);
cee24a3e 1323 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6 1324 HT_AGG_STATE_OPERATIONAL;
07346f81 1325 spin_unlock_bh(&sta->lock);
d92684e6
RR		 1326 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1327 WLAN_BACK_RECIPIENT);
1328 }
d0709a65 1329 rcu_read_unlock();
688b88a4
RR		 1330}
1331
f698d856 1332static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1333 struct ieee80211_msrment_ie *request_ie,
1334 const u8 *da, const u8 *bssid,
1335 u8 dialog_token)
1336{
f698d856 1337 struct ieee80211_local *local = sdata->local;
b6623486
AK		 1338 struct sk_buff *skb;
1339 struct ieee80211_mgmt *msr_report;
1340
1341 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1342 sizeof(struct ieee80211_msrment_ie));
1343
1344 if (!skb) {
1345 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1346 "measurement report frame\n", sdata->dev->name);
b6623486
AK		 1347 return;
1348 }
1349
1350 skb_reserve(skb, local->hw.extra_tx_headroom);
1351 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1352 memset(msr_report, 0, 24);
1353 memcpy(msr_report->da, da, ETH_ALEN);
f698d856 1354 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
b6623486 1355 memcpy(msr_report->bssid, bssid, ETH_ALEN);
e7827a70 1356 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
b6623486
AK		 1357 IEEE80211_STYPE_ACTION);
1358
1359 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1360 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1361 msr_report->u.action.u.measurement.action_code =
1362 WLAN_ACTION_SPCT_MSR_RPRT;
1363 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1364
1365 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1366 msr_report->u.action.u.measurement.length =
1367 sizeof(struct ieee80211_msrment_ie);
1368
1369 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1370 sizeof(struct ieee80211_msrment_ie));
1371 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1372 msr_report->u.action.u.measurement.msr_elem.mode |=
1373 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1374 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1375
f698d856 1376 ieee80211_sta_tx(sdata, skb, 0);
b6623486
AK		 1377}
1378
f698d856 1379static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1380 struct ieee80211_mgmt *mgmt,
1381 size_t len)
1382{
1383 /*
1384 * Ignoring measurement request is spec violation.
1385 * Mandatory measurements must be reported optional
1386 * measurements might be refused or reported incapable
1387 * For now just refuse
1388 * TODO: Answer basic measurement as unmeasured
1389 */
f698d856 1390 ieee80211_send_refuse_measurement_request(sdata,
b6623486
AK		 1391 &mgmt->u.action.u.measurement.msr_elem,
1392 mgmt->sa, mgmt->bssid,
1393 mgmt->u.action.u.measurement.dialog_token);
1394}
1395
1396
f698d856 1397static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1398 struct ieee80211_if_sta *ifsta,
1399 struct ieee80211_mgmt *mgmt,
1400 size_t len)
1401{
f0706e82 1402 u16 auth_alg, auth_transaction, status_code;
0795af57 1403 DECLARE_MAC_BUF(mac);
f0706e82 1404
48c2fc59 1405 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 1406 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1407 return;
f0706e82 1408
f4ea83dd 1409 if (len < 24 + 6)
f0706e82 1410 return;
f0706e82 1411
51fb61e7 1412 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1413 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1414 return;
f0706e82 1415
51fb61e7 1416 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1417 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1418 return;
f0706e82
JB		 1419
1420 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1421 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1422 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1423
51fb61e7 1424 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1425 /*
1426 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1427 * networks and most implementations do not seem to use it.
1428 * However, try to reply to authentication attempts if someone
1429 * has actually implemented this.
135a2110 1430 */
f4ea83dd 1431 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1432 return;
f698d856 1433 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1434 }
1435
1436 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1437 auth_transaction != ifsta->auth_transaction)
f0706e82 1438 return;
f0706e82
JB		 1439
1440 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1441 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1442 u8 algs[3];
1443 const int num_algs = ARRAY_SIZE(algs);
1444 int i, pos;
1445 algs[0] = algs[1] = algs[2] = 0xff;
1446 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1447 algs[0] = WLAN_AUTH_OPEN;
1448 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1449 algs[1] = WLAN_AUTH_SHARED_KEY;
1450 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1451 algs[2] = WLAN_AUTH_LEAP;
1452 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1453 pos = 0;
1454 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1455 pos = 1;
1456 else
1457 pos = 2;
1458 for (i = 0; i < num_algs; i++) {
1459 pos++;
1460 if (pos >= num_algs)
1461 pos = 0;
1462 if (algs[pos] == ifsta->auth_alg ||
1463 algs[pos] == 0xff)
1464 continue;
1465 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1466 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1467 continue;
1468 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1469 break;
1470 }
1471 }
1472 return;
1473 }
1474
1475 switch (ifsta->auth_alg) {
1476 case WLAN_AUTH_OPEN:
1477 case WLAN_AUTH_LEAP:
f698d856 1478 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1479 break;
1480 case WLAN_AUTH_SHARED_KEY:
1481 if (ifsta->auth_transaction == 4)
f698d856 1482 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1483 else
f698d856 1484 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1485 break;
1486 }
1487}
1488
1489
f698d856 1490static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1491 struct ieee80211_if_sta *ifsta,
1492 struct ieee80211_mgmt *mgmt,
1493 size_t len)
1494{
1495 u16 reason_code;
0795af57 1496 DECLARE_MAC_BUF(mac);
f0706e82 1497
f4ea83dd 1498 if (len < 24 + 2)
f0706e82 1499 return;
f0706e82 1500
f4ea83dd 1501 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1502 return;
f0706e82
JB		 1503
1504 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1505
988c0f72 1506 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1507 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1508
48c2fc59
TW		 1509 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1510 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1511 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1512 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1513 mod_timer(&ifsta->timer, jiffies +
1514 IEEE80211_RETRY_AUTH_INTERVAL);
1515 }
1516
aa458d17 1517 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1518 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1519}
1520
1521
f698d856 1522static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1523 struct ieee80211_if_sta *ifsta,
1524 struct ieee80211_mgmt *mgmt,
1525 size_t len)
1526{
1527 u16 reason_code;
0795af57 1528 DECLARE_MAC_BUF(mac);
f0706e82 1529
f4ea83dd 1530 if (len < 24 + 2)
f0706e82 1531 return;
f0706e82 1532
f4ea83dd 1533 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1534 return;
f0706e82
JB		 1535
1536 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1537
d6f2da5b 1538 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1539 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1540
48c2fc59
TW		 1541 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1542 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1543 mod_timer(&ifsta->timer, jiffies +
1544 IEEE80211_RETRY_AUTH_INTERVAL);
1545 }
1546
aa458d17 1547 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1548}
1549
1550
471b3efd 1551static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1552 struct ieee80211_if_sta *ifsta,
1553 struct ieee80211_mgmt *mgmt,
1554 size_t len,
1555 int reassoc)
1556{
471b3efd 1557 struct ieee80211_local *local = sdata->local;
8318d78a 1558 struct ieee80211_supported_band *sband;
f0706e82 1559 struct sta_info *sta;
8318d78a 1560 u64 rates, basic_rates;
f0706e82
JB		 1561 u16 capab_info, status_code, aid;
1562 struct ieee802_11_elems elems;
471b3efd 1563 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1564 u8 *pos;
1565 int i, j;
0795af57 1566 DECLARE_MAC_BUF(mac);
8318d78a 1567 bool have_higher_than_11mbit = false;
f0706e82
JB		 1568
1569 /* AssocResp and ReassocResp have identical structure, so process both
1570 * of them in this function. */
1571
48c2fc59 1572 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1573 return;
f0706e82 1574
f4ea83dd 1575 if (len < 24 + 6)
f0706e82 1576 return;
f0706e82 1577
f4ea83dd 1578 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1579 return;
f0706e82
JB		 1580
1581 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1582 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1583 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1584
0795af57 1585 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1586 "status=%d aid=%d)\n",
f698d856 1587 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1588 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1589
1590 if (status_code != WLAN_STATUS_SUCCESS) {
1591 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1592 sdata->dev->name, status_code);
8a69aa93
DD		 1593 /* if this was a reassociation, ensure we try a "full"
1594 * association next time. This works around some broken APs
1595 * which do not correctly reject reassociation requests. */
d6f2da5b 1596 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1597 return;
1598 }
1599
1dd84aa2
JB		 1600 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1601 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1602 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1603 aid &= ~(BIT(15) | BIT(14));
1604
f0706e82 1605 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1606 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1607
1608 if (!elems.supp_rates) {
1609 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1610 sdata->dev->name);
f0706e82
JB		 1611 return;
1612 }
1613
f698d856 1614 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1615 ifsta->aid = aid;
1616 ifsta->ap_capab = capab_info;
1617
1618 kfree(ifsta->assocresp_ies);
1619 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1620 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1621 if (ifsta->assocresp_ies)
1622 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1623
d0709a65
JB		 1624 rcu_read_lock();
1625
f0706e82
JB		 1626 /* Add STA entry for the AP */
1627 sta = sta_info_get(local, ifsta->bssid);
1628 if (!sta) {
1629 struct ieee80211_sta_bss *bss;
73651ee6 1630 int err;
d0709a65 1631
73651ee6
JB		 1632 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1633 if (!sta) {
1634 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1635 " the AP\n", sdata->dev->name);
d0709a65 1636 rcu_read_unlock();
f0706e82
JB		 1637 return;
1638 }
60f8b39c
JB		 1639 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1640 local->hw.conf.channel->center_freq,
1641 ifsta->ssid, ifsta->ssid_len);
1642 if (bss) {
1643 sta->last_signal = bss->signal;
1644 sta->last_qual = bss->qual;
1645 sta->last_noise = bss->noise;
1646 ieee80211_rx_bss_put(local, bss);
1647 }
f709fc69 1648
60f8b39c
JB		 1649 err = sta_info_insert(sta);
1650 if (err) {
1651 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1652 " the AP (error %d)\n", sdata->dev->name, err);
1653 rcu_read_unlock();
1654 return;
f709fc69 1655 }
60f8b39c
JB		 1656 /* update new sta with its last rx activity */
1657 sta->last_rx = jiffies;
f709fc69 1658 }
f709fc69 1659
60f8b39c
JB		 1660 /*
1661 * FIXME: Do we really need to update the sta_info's information here?
1662 * We already know about the AP (we found it in our list) so it
1663 * should already be filled with the right info, no?
1664 * As is stands, all this is racy because typically we assume
1665 * the information that is filled in here (except flags) doesn't
1666 * change while a STA structure is alive. As such, it should move
1667 * to between the sta_info_alloc() and sta_info_insert() above.
1668 */
f709fc69 1669
60f8b39c
JB		 1670 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1671 WLAN_STA_AUTHORIZED);
05e5e883 1672
60f8b39c
JB		 1673 rates = 0;
1674 basic_rates = 0;
1675 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1676
60f8b39c
JB		 1677 for (i = 0; i < elems.supp_rates_len; i++) {
1678 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1679
60f8b39c
JB		 1680 if (rate > 110)
1681 have_higher_than_11mbit = true;
1682
1683 for (j = 0; j < sband->n_bitrates; j++) {
1684 if (sband->bitrates[j].bitrate == rate)
1685 rates |= BIT(j);
1686 if (elems.supp_rates[i] & 0x80)
1687 basic_rates |= BIT(j);
f709fc69 1688 }
f709fc69
LCC		 1689 }
1690
60f8b39c
JB		 1691 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1692 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1693
60f8b39c
JB		 1694 if (rate > 110)
1695 have_higher_than_11mbit = true;
f0706e82 1696
60f8b39c
JB		 1697 for (j = 0; j < sband->n_bitrates; j++) {
1698 if (sband->bitrates[j].bitrate == rate)
1699 rates |= BIT(j);
1700 if (elems.ext_supp_rates[i] & 0x80)
1701 basic_rates |= BIT(j);
1702 }
1ebebea8 1703 }
f0706e82 1704
60f8b39c
JB		 1705 sta->supp_rates[local->hw.conf.channel->band] = rates;
1706 sdata->basic_rates = basic_rates;
1707
1708 /* cf. IEEE 802.11 9.2.12 */
1709 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1710 have_higher_than_11mbit)
1711 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1712 else
1713 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1714
60f8b39c
JB		 1715 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1716 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1717 struct ieee80211_ht_bss_info bss_info;
1718 ieee80211_ht_cap_ie_to_ht_info(
1719 (struct ieee80211_ht_cap *)
1720 elems.ht_cap_elem, &sta->ht_info);
1721 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1722 (struct ieee80211_ht_addt_info *)
1723 elems.ht_info_elem, &bss_info);
1724 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1725 }
f0706e82 1726
60f8b39c 1727 rate_control_rate_init(sta, local);
f0706e82 1728
60f8b39c
JB		 1729 if (elems.wmm_param) {
1730 set_sta_flags(sta, WLAN_STA_WME);
1731 rcu_read_unlock();
1732 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1733 elems.wmm_param_len);
1734 } else
1735 rcu_read_unlock();
f0706e82 1736
60f8b39c
JB		 1737 /* set AID and assoc capability,
1738 * ieee80211_set_associated() will tell the driver */
1739 bss_conf->aid = aid;
1740 bss_conf->assoc_capability = capab_info;
1741 ieee80211_set_associated(sdata, ifsta);
f0706e82 1742
60f8b39c 1743 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1744}
1745
1746
f698d856 1747static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 1748 struct ieee80211_if_sta *ifsta,
1749 struct ieee80211_sta_bss *bss)
1750{
f698d856 1751 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1752 int res, rates, i, j;
1753 struct sk_buff *skb;
1754 struct ieee80211_mgmt *mgmt;
a607268a 1755 u8 *pos;
a607268a 1756 struct ieee80211_supported_band *sband;
507b06d0 1757 union iwreq_data wrqu;
a607268a
BR		 1758
1759 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1760
1761 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1762 sta_info_flush_delayed(sdata);
a607268a
BR		 1763
1764 if (local->ops->reset_tsf) {
1765 /* Reset own TSF to allow time synchronization work. */
1766 local->ops->reset_tsf(local_to_hw(local));
1767 }
1768 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1769 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1770 if (res)
1771 return res;
1772
1773 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1774
a607268a
BR		 1775 sdata->drop_unencrypted = bss->capability &
1776 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1777
f698d856 1778 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1779
be038b37
AK		 1780 if (res)
1781 return res;
a607268a 1782
9d139c81 1783 /* Build IBSS probe response */
a607268a 1784 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1785 if (skb) {
a607268a
BR		 1786 skb_reserve(skb, local->hw.extra_tx_headroom);
1787
1788 mgmt = (struct ieee80211_mgmt *)
1789 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1790 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1791 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1792 IEEE80211_STYPE_PROBE_RESP);
a607268a 1793 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1794 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1795 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1796 mgmt->u.beacon.beacon_int =
1797 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1798 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1799 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1800
1801 pos = skb_put(skb, 2 + ifsta->ssid_len);
1802 *pos++ = WLAN_EID_SSID;
1803 *pos++ = ifsta->ssid_len;
1804 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1805
1806 rates = bss->supp_rates_len;
1807 if (rates > 8)
1808 rates = 8;
1809 pos = skb_put(skb, 2 + rates);
1810 *pos++ = WLAN_EID_SUPP_RATES;
1811 *pos++ = rates;
1812 memcpy(pos, bss->supp_rates, rates);
1813
1814 if (bss->band == IEEE80211_BAND_2GHZ) {
1815 pos = skb_put(skb, 2 + 1);
1816 *pos++ = WLAN_EID_DS_PARAMS;
1817 *pos++ = 1;
1818 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1819 }
1820
1821 pos = skb_put(skb, 2 + 2);
1822 *pos++ = WLAN_EID_IBSS_PARAMS;
1823 *pos++ = 2;
1824 /* FIX: set ATIM window based on scan results */
1825 *pos++ = 0;
1826 *pos++ = 0;
1827
1828 if (bss->supp_rates_len > 8) {
1829 rates = bss->supp_rates_len - 8;
1830 pos = skb_put(skb, 2 + rates);
1831 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1832 *pos++ = rates;
1833 memcpy(pos, &bss->supp_rates[8], rates);
1834 }
1835
9d139c81 1836 ifsta->probe_resp = skb;
e039fa4a 1837
9d139c81
JB		 1838 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1839 }
a607268a 1840
9d139c81
JB		 1841 rates = 0;
1842 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1843 for (i = 0; i < bss->supp_rates_len; i++) {
1844 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1845 for (j = 0; j < sband->n_bitrates; j++)
1846 if (sband->bitrates[j].bitrate == bitrate)
1847 rates |= BIT(j);
a607268a 1848 }
9d139c81
JB		 1849 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1850
b079ada7 1851 ieee80211_sta_def_wmm_params(sdata, bss);
a607268a 1852
48c2fc59 1853 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1854 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1855
507b06d0
DW		 1856 memset(&wrqu, 0, sizeof(wrqu));
1857 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1858 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1859
1860 return res;
1861}
1862
f709fc69
LCC		 1863u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
1864 struct ieee802_11_elems *elems,
1865 enum ieee80211_band band)
1866{
1867 struct ieee80211_supported_band *sband;
1868 struct ieee80211_rate *bitrates;
1869 size_t num_rates;
1870 u64 supp_rates;
1871 int i, j;
1872 sband = local->hw.wiphy->bands[band];
1873
1874 if (!sband) {
1875 WARN_ON(1);
1876 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1877 }
1878
1879 bitrates = sband->bitrates;
1880 num_rates = sband->n_bitrates;
1881 supp_rates = 0;
1882 for (i = 0; i < elems->supp_rates_len +
1883 elems->ext_supp_rates_len; i++) {
1884 u8 rate = 0;
1885 int own_rate;
1886 if (i < elems->supp_rates_len)
1887 rate = elems->supp_rates[i];
1888 else if (elems->ext_supp_rates)
1889 rate = elems->ext_supp_rates
1890 [i - elems->supp_rates_len];
1891 own_rate = 5 * (rate & 0x7f);
1892 for (j = 0; j < num_rates; j++)
1893 if (bitrates[j].bitrate == own_rate)
1894 supp_rates |= BIT(j);
1895 }
1896 return supp_rates;
1897}
1898
8e1535d5
EG		 1899static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
1900 enum ieee80211_band band)
1901{
1902 struct ieee80211_supported_band *sband;
1903 struct ieee80211_rate *bitrates;
1904 u64 mandatory_rates;
1905 enum ieee80211_rate_flags mandatory_flag;
1906 int i;
1907
1908 sband = local->hw.wiphy->bands[band];
1909 if (!sband) {
1910 WARN_ON(1);
1911 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1912 }
1913
1914 if (band == IEEE80211_BAND_2GHZ)
1915 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1916 else
1917 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1918
1919 bitrates = sband->bitrates;
1920 mandatory_rates = 0;
1921 for (i = 0; i < sband->n_bitrates; i++)
1922 if (bitrates[i].flags & mandatory_flag)
1923 mandatory_rates |= BIT(i);
1924 return mandatory_rates;
1925}
a607268a 1926
98c8fccf
JB		 1927static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1928 struct ieee80211_mgmt *mgmt,
1929 size_t len,
1930 struct ieee80211_rx_status *rx_status,
1931 struct ieee802_11_elems *elems,
1932 bool beacon)
1933{
1934 struct ieee80211_local *local = sdata->local;
1935 int freq;
1936 struct ieee80211_sta_bss *bss;
1937 struct sta_info *sta;
1938 struct ieee80211_channel *channel;
1939 u64 beacon_timestamp, rx_timestamp;
1940 u64 supp_rates = 0;
1941 enum ieee80211_band band = rx_status->band;
1942 DECLARE_MAC_BUF(mac);
1943 DECLARE_MAC_BUF(mac2);
1944
1945 if (elems->ds_params && elems->ds_params_len == 1)
1946 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1947 else
1948 freq = rx_status->freq;
1949
1950 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1951
1952 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1953 return;
1954
1955 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
1956 elems->mesh_config && mesh_matches_local(elems, sdata)) {
1957 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1958
1959 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
1960 mesh_peer_accepts_plinks(elems));
1961 }
1962
1963 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1964 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1965 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1966
1967 rcu_read_lock();
1968
1969 sta = sta_info_get(local, mgmt->sa);
1970 if (sta) {
1971 u64 prev_rates;
1972
1973 prev_rates = sta->supp_rates[band];
1974 /* make sure mandatory rates are always added */
1975 sta->supp_rates[band] = supp_rates |
1976 ieee80211_sta_get_mandatory_rates(local, band);
1977
1978#ifdef CONFIG_MAC80211_IBSS_DEBUG
1979 if (sta->supp_rates[band] != prev_rates)
1980 printk(KERN_DEBUG "%s: updated supp_rates set "
1981 "for %s based on beacon info (0x%llx | "
1982 "0x%llx -> 0x%llx)\n",
1983 sdata->dev->name, print_mac(mac, sta->addr),
1984 (unsigned long long) prev_rates,
1985 (unsigned long long) supp_rates,
1986 (unsigned long long) sta->supp_rates[band]);
1987#endif
1988 } else {
1989 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1990 mgmt->sa, supp_rates);
1991 }
1992
1993 rcu_read_unlock();
1994 }
1995
1996 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1997 freq, beacon);
1998 if (!bss)
1999 return;
2000
2001 /* was just updated in ieee80211_bss_info_update */
2002 beacon_timestamp = bss->timestamp;
2003
30b89b0f
JB		 2004 /*
2005 * In STA mode, the remaining parameters should not be overridden
2006 * by beacons because they're not necessarily accurate there.
2007 */
2008 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 2009 bss->last_probe_resp && beacon) {
3e122be0 2010 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 2011 return;
2012 }
2013
9d9bf77d
BR		 2014 /* check if we need to merge IBSS */
2015 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
fba4a1e6 2016 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 2017 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 2018 elems->ssid_len == sdata->u.sta.ssid_len &&
2019 memcmp(elems->ssid, sdata->u.sta.ssid,
2020 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 2021 if (rx_status->flag & RX_FLAG_TSFT) {
2022 /* in order for correct IBSS merging we need mactime
2023 *
2024 * since mactime is defined as the time the first data
2025 * symbol of the frame hits the PHY, and the timestamp
2026 * of the beacon is defined as "the time that the data
2027 * symbol containing the first bit of the timestamp is
2028 * transmitted to the PHY plus the transmitting STA’s
2029 * delays through its local PHY from the MAC-PHY
2030 * interface to its interface with the WM"
2031 * (802.11 11.1.2) - equals the time this bit arrives at
2032 * the receiver - we have to take into account the
2033 * offset between the two.
2034 * e.g: at 1 MBit that means mactime is 192 usec earlier
2035 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2036 */
8e1535d5 2037 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 2038 bitrates[rx_status->rate_idx].bitrate;
2039 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2040 } else if (local && local->ops && local->ops->get_tsf)
2041 /* second best option: get current TSF */
2042 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2043 else
2044 /* can't merge without knowing the TSF */
2045 rx_timestamp = -1LLU;
2046#ifdef CONFIG_MAC80211_IBSS_DEBUG
2047 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2048 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2049 print_mac(mac, mgmt->sa),
2050 print_mac(mac2, mgmt->bssid),
2051 (unsigned long long)rx_timestamp,
2052 (unsigned long long)beacon_timestamp,
2053 (unsigned long long)(rx_timestamp - beacon_timestamp),
2054 jiffies);
2055#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2056 if (beacon_timestamp > rx_timestamp) {
576fdeae 2057#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 2058 printk(KERN_DEBUG "%s: beacon TSF higher than "
2059 "local TSF - IBSS merge with BSSID %s\n",
f698d856 2060 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 2061#endif
f698d856
JBG		 2062 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2063 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 2064 mgmt->bssid, mgmt->sa,
8e1535d5 2065 supp_rates);
9d9bf77d
BR		 2066 }
2067 }
2068
3e122be0 2069 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2070}
2071
2072
f698d856 2073static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2074 struct ieee80211_mgmt *mgmt,
2075 size_t len,
2076 struct ieee80211_rx_status *rx_status)
2077{
ae6a44e3
EK		 2078 size_t baselen;
2079 struct ieee802_11_elems elems;
9859b81e 2080 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 2081
8e7cdbb6
TW		 2082 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2083 return; /* ignore ProbeResp to foreign address */
2084
ae6a44e3
EK		 2085 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2086 if (baselen > len)
2087 return;
2088
2089 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2090 &elems);
2091
98c8fccf 2092 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 2093
2094 /* direct probe may be part of the association flow */
2095 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2096 &ifsta->request)) {
2097 printk(KERN_DEBUG "%s direct probe responded\n",
2098 sdata->dev->name);
2099 ieee80211_authenticate(sdata, ifsta);
2100 }
f0706e82
JB		 2101}
2102
2103
f698d856 2104static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2105 struct ieee80211_mgmt *mgmt,
2106 size_t len,
2107 struct ieee80211_rx_status *rx_status)
2108{
f0706e82 2109 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2110 size_t baselen;
2111 struct ieee802_11_elems elems;
f698d856 2112 struct ieee80211_local *local = sdata->local;
d3c990fb 2113 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2114 u32 changed = 0;
f0706e82 2115
ae6a44e3
EK		 2116 /* Process beacon from the current BSS */
2117 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2118 if (baselen > len)
2119 return;
2120
2121 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2122
98c8fccf 2123 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 2124
51fb61e7 2125 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2126 return;
2127 ifsta = &sdata->u.sta;
2128
d6f2da5b 2129 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2130 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2131 return;
2132
fe3fa827
JB		 2133 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2134 elems.wmm_param_len);
2135
5628221c 2136 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2137 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2138 else {
2139 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2140 changed |= ieee80211_handle_protect_preamb(sdata, false,
2141 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2142 }
f0706e82 2143
d3c990fb 2144 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2145 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2146 struct ieee80211_ht_bss_info bss_info;
2147
2148 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2149 (struct ieee80211_ht_addt_info *)
2150 elems.ht_info_elem, &bss_info);
38668c05
TW		 2151 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2152 &bss_info);
d3c990fb
RR		 2153 }
2154
471b3efd 2155 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2156}
2157
2158
f698d856 2159static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2160 struct ieee80211_if_sta *ifsta,
2161 struct ieee80211_mgmt *mgmt,
2162 size_t len,
2163 struct ieee80211_rx_status *rx_status)
2164{
f698d856 2165 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2166 int tx_last_beacon;
2167 struct sk_buff *skb;
2168 struct ieee80211_mgmt *resp;
2169 u8 *pos, *end;
0795af57
JP		 2170 DECLARE_MAC_BUF(mac);
2171#ifdef CONFIG_MAC80211_IBSS_DEBUG
2172 DECLARE_MAC_BUF(mac2);
2173 DECLARE_MAC_BUF(mac3);
2174#endif
f0706e82 2175
51fb61e7 2176 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 2177 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2178 len < 24 + 2 || !ifsta->probe_resp)
2179 return;
2180
2181 if (local->ops->tx_last_beacon)
2182 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2183 else
2184 tx_last_beacon = 1;
2185
2186#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2187 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2188 "%s (tx_last_beacon=%d)\n",
f698d856 2189 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 2190 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2191#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2192
2193 if (!tx_last_beacon)
2194 return;
2195
2196 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2197 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2198 return;
2199
2200 end = ((u8 *) mgmt) + len;
2201 pos = mgmt->u.probe_req.variable;
2202 if (pos[0] != WLAN_EID_SSID ||
2203 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2204#ifdef CONFIG_MAC80211_IBSS_DEBUG
2205 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2206 "from %s\n",
f698d856 2207 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 2208#endif
f0706e82
JB		 2209 return;
2210 }
2211 if (pos[1] != 0 &&
2212 (pos[1] != ifsta->ssid_len ||
2213 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2214 /* Ignore ProbeReq for foreign SSID */
2215 return;
2216 }
2217
2218 /* Reply with ProbeResp */
0ec0b7ac 2219 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2220 if (!skb)
2221 return;
2222
2223 resp = (struct ieee80211_mgmt *) skb->data;
2224 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2225#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2226 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 2227 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 2228#endif /* CONFIG_MAC80211_IBSS_DEBUG */
f698d856 2229 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 2230}
2231
f698d856 2232static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
4e20cb29
JB		 2233 struct ieee80211_if_sta *ifsta,
2234 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2235 size_t len,
2236 struct ieee80211_rx_status *rx_status)
9f985b0e 2237{
f698d856 2238 struct ieee80211_local *local = sdata->local;
f709fc69 2239
9c80d3dc
JB		 2240 /* all categories we currently handle have action_code */
2241 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
9f985b0e
RR		 2242 return;
2243
2244 switch (mgmt->u.action.category) {
b6623486
AK		 2245 case WLAN_CATEGORY_SPECTRUM_MGMT:
2246 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2247 break;
5fd12d4d 2248 switch (mgmt->u.action.u.measurement.action_code) {
b6623486
AK		 2249 case WLAN_ACTION_SPCT_MSR_REQ:
2250 if (len < (IEEE80211_MIN_ACTION_SIZE +
2251 sizeof(mgmt->u.action.u.measurement)))
2252 break;
f698d856 2253 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
b6623486
AK		 2254 break;
2255 }
2256 break;
9f985b0e
RR		 2257 case WLAN_CATEGORY_BACK:
2258 switch (mgmt->u.action.u.addba_req.action_code) {
2259 case WLAN_ACTION_ADDBA_REQ:
2260 if (len < (IEEE80211_MIN_ACTION_SIZE +
2261 sizeof(mgmt->u.action.u.addba_req)))
2262 break;
f698d856 2263 ieee80211_sta_process_addba_request(local, mgmt, len);
9f985b0e 2264 break;
eadc8d9e
RR		 2265 case WLAN_ACTION_ADDBA_RESP:
2266 if (len < (IEEE80211_MIN_ACTION_SIZE +
2267 sizeof(mgmt->u.action.u.addba_resp)))
2268 break;
f698d856 2269 ieee80211_sta_process_addba_resp(local, mgmt, len);
eadc8d9e 2270 break;
688b88a4
RR		 2271 case WLAN_ACTION_DELBA:
2272 if (len < (IEEE80211_MIN_ACTION_SIZE +
2273 sizeof(mgmt->u.action.u.delba)))
2274 break;
f698d856 2275 ieee80211_sta_process_delba(sdata, mgmt, len);
688b88a4 2276 break;
9f985b0e
RR		 2277 }
2278 break;
f709fc69 2279 case PLINK_CATEGORY:
902acc78 2280 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2281 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
f709fc69 2282 break;
f709fc69 2283 case MESH_PATH_SEL_CATEGORY:
902acc78 2284 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2285 mesh_rx_path_sel_frame(sdata, mgmt, len);
f709fc69 2286 break;
9f985b0e
RR		 2287 }
2288}
f0706e82 2289
f698d856 2290void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2291 struct ieee80211_rx_status *rx_status)
2292{
f698d856 2293 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2294 struct ieee80211_if_sta *ifsta;
2295 struct ieee80211_mgmt *mgmt;
2296 u16 fc;
2297
2298 if (skb->len < 24)
2299 goto fail;
2300
f0706e82
JB		 2301 ifsta = &sdata->u.sta;
2302
2303 mgmt = (struct ieee80211_mgmt *) skb->data;
2304 fc = le16_to_cpu(mgmt->frame_control);
2305
2306 switch (fc & IEEE80211_FCTL_STYPE) {
2307 case IEEE80211_STYPE_PROBE_REQ:
2308 case IEEE80211_STYPE_PROBE_RESP:
2309 case IEEE80211_STYPE_BEACON:
f709fc69 2310 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2311 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2312 case IEEE80211_STYPE_AUTH:
2313 case IEEE80211_STYPE_ASSOC_RESP:
2314 case IEEE80211_STYPE_REASSOC_RESP:
2315 case IEEE80211_STYPE_DEAUTH:
2316 case IEEE80211_STYPE_DISASSOC:
2317 skb_queue_tail(&ifsta->skb_queue, skb);
2318 queue_work(local->hw.workqueue, &ifsta->work);
2319 return;
f0706e82
JB		 2320 }
2321
2322 fail:
2323 kfree_skb(skb);
2324}
2325
f698d856 2326static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2327 struct sk_buff *skb)
2328{
2329 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2330 struct ieee80211_if_sta *ifsta;
2331 struct ieee80211_mgmt *mgmt;
2332 u16 fc;
2333
f0706e82
JB		 2334 ifsta = &sdata->u.sta;
2335
2336 rx_status = (struct ieee80211_rx_status *) skb->cb;
2337 mgmt = (struct ieee80211_mgmt *) skb->data;
2338 fc = le16_to_cpu(mgmt->frame_control);
2339
2340 switch (fc & IEEE80211_FCTL_STYPE) {
2341 case IEEE80211_STYPE_PROBE_REQ:
f698d856 2342 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 2343 rx_status);
2344 break;
2345 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2346 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2347 break;
2348 case IEEE80211_STYPE_BEACON:
f698d856 2349 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2350 break;
2351 case IEEE80211_STYPE_AUTH:
f698d856 2352 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2353 break;
2354 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2355 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2356 break;
2357 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2358 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2359 break;
2360 case IEEE80211_STYPE_DEAUTH:
f698d856 2361 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2362 break;
2363 case IEEE80211_STYPE_DISASSOC:
f698d856 2364 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82 2365 break;
9f985b0e 2366 case IEEE80211_STYPE_ACTION:
f698d856 2367 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
9f985b0e 2368 break;
f0706e82
JB		 2369 }
2370
2371 kfree_skb(skb);
2372}
2373
2374
f698d856 2375static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2376{
f698d856 2377 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2378 int active = 0;
2379 struct sta_info *sta;
2380
d0709a65
JB		 2381 rcu_read_lock();
2382
2383 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2384 if (sta->sdata == sdata &&
f0706e82
JB		 2385 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2386 jiffies)) {
2387 active++;
2388 break;
2389 }
2390 }
d0709a65
JB		 2391
2392 rcu_read_unlock();
f0706e82
JB		 2393
2394 return active;
2395}
2396
2397
f698d856 2398static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
f0706e82 2399{
f698d856 2400 struct ieee80211_local *local = sdata->local;
f0706e82 2401 struct sta_info *sta, *tmp;
be8755e1 2402 LIST_HEAD(tmp_list);
0795af57 2403 DECLARE_MAC_BUF(mac);
d0709a65 2404 unsigned long flags;
f0706e82 2405
d0709a65 2406 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 2407 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 2408 if (time_after(jiffies, sta->last_rx + exp_time)) {
f4ea83dd 2409#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2410 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
f698d856 2411 sdata->dev->name, print_mac(mac, sta->addr));
f4ea83dd 2412#endif
cb585bcc 2413 __sta_info_unlink(&sta);
d0709a65
JB		 2414 if (sta)
2415 list_add(&sta->list, &tmp_list);
f0706e82 2416 }
d0709a65 2417 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 2418
d0709a65
JB		 2419 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2420 sta_info_destroy(sta);
f0706e82
JB		 2421}
2422
2423
f698d856 2424static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2425 struct ieee80211_if_sta *ifsta)
2426{
2427 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2428
f698d856
JBG		 2429 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2430 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2431 return;
2432
2433 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 2434 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2435 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 2436}
2437
2438
f709fc69 2439#ifdef CONFIG_MAC80211_MESH
f698d856 2440static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
f709fc69
LCC		 2441 struct ieee80211_if_sta *ifsta)
2442{
f709fc69
LCC		 2443 bool free_plinks;
2444
f698d856
JBG		 2445 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
2446 mesh_path_expire(sdata);
f709fc69
LCC		 2447
2448 free_plinks = mesh_plink_availables(sdata);
2449 if (free_plinks != sdata->u.sta.accepting_plinks)
9d139c81 2450 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 2451
2452 mod_timer(&ifsta->timer, jiffies +
2453 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
2454}
2455
2456
f698d856 2457void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
f709fc69
LCC		 2458{
2459 struct ieee80211_if_sta *ifsta;
f709fc69 2460 ifsta = &sdata->u.sta;
48c2fc59 2461 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
f709fc69 2462 ieee80211_sta_timer((unsigned long)sdata);
56a6d13d 2463 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 2464}
2465#endif
2466
2467
f0706e82
JB		 2468void ieee80211_sta_timer(unsigned long data)
2469{
60f8b39c
JB		 2470 struct ieee80211_sub_if_data *sdata =
2471 (struct ieee80211_sub_if_data *) data;
2472 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2473 struct ieee80211_local *local = sdata->local;
f0706e82 2474
60f8b39c
JB		 2475 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2476 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2477}
2478
f698d856 2479static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2480 struct ieee80211_if_sta *ifsta)
2481{
f698d856 2482 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2483
2484 if (local->ops->reset_tsf) {
2485 /* Reset own TSF to allow time synchronization work. */
2486 local->ops->reset_tsf(local_to_hw(local));
2487 }
2488
2489 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2490
2491
2492 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2493 ifsta->auth_alg = WLAN_AUTH_OPEN;
2494 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2495 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2496 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2497 ifsta->auth_alg = WLAN_AUTH_LEAP;
2498 else
2499 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2500 ifsta->auth_transaction = -1;
d6f2da5b 2501 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2502 ifsta->assoc_scan_tries = 0;
9859b81e 2503 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2504 ifsta->auth_tries = 0;
2505 ifsta->assoc_tries = 0;
24e64622 2506 netif_tx_stop_all_queues(sdata->dev);
f698d856 2507 netif_carrier_off(sdata->dev);
f0706e82
JB		 2508}
2509
2510
f698d856 2511void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2512 struct ieee80211_if_sta *ifsta)
2513{
f698d856 2514 struct ieee80211_local *local = sdata->local;
f0706e82 2515
51fb61e7 2516 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2517 return;
2518
d6f2da5b 2519 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3b7ee69d 2520 IEEE80211_STA_AUTO_BSSID_SEL)) &&
d6f2da5b 2521 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3b7ee69d
TW		 2522 IEEE80211_STA_AUTO_SSID_SEL))) {
2523
2524 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2525 ieee80211_set_disassoc(sdata, ifsta, true, true,
2526 WLAN_REASON_DEAUTH_LEAVING);
2527
f0706e82
JB		 2528 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2529 queue_work(local->hw.workqueue, &ifsta->work);
2530 }
2531}
2532
2533static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2534 const char *ssid, int ssid_len)
2535{
2536 int tmp, hidden_ssid;
2537
48225709
MW		 2538 if (ssid_len == ifsta->ssid_len &&
2539 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2540 return 1;
2541
d6f2da5b 2542 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2543 return 0;
2544
2545 hidden_ssid = 1;
2546 tmp = ssid_len;
2547 while (tmp--) {
2548 if (ssid[tmp] != '\0') {
2549 hidden_ssid = 0;
2550 break;
2551 }
2552 }
2553
2554 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2555 return 1;
2556
2557 if (ssid_len == 1 && ssid[0] == ' ')
2558 return 1;
2559
2560 return 0;
2561}
2562
f698d856 2563static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2564 struct ieee80211_if_sta *ifsta)
2565{
f698d856 2566 struct ieee80211_local *local = sdata->local;
f0706e82 2567 struct ieee80211_sta_bss *bss;
8318d78a 2568 struct ieee80211_supported_band *sband;
f0706e82
JB		 2569 u8 bssid[ETH_ALEN], *pos;
2570 int i;
167ad6f7 2571 int ret;
0795af57 2572 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2573
2574#if 0
2575 /* Easier testing, use fixed BSSID. */
2576 memset(bssid, 0xfe, ETH_ALEN);
2577#else
2578 /* Generate random, not broadcast, locally administered BSSID. Mix in
2579 * own MAC address to make sure that devices that do not have proper
2580 * random number generator get different BSSID. */
2581 get_random_bytes(bssid, ETH_ALEN);
2582 for (i = 0; i < ETH_ALEN; i++)
f698d856 2583 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 2584 bssid[0] &= ~0x01;
2585 bssid[0] |= 0x02;
2586#endif
2587
0795af57 2588 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 2589 sdata->dev->name, print_mac(mac, bssid));
f0706e82 2590
98c8fccf 2591 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2592 local->hw.conf.channel->center_freq,
cffdd30d 2593 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2594 if (!bss)
2595 return -ENOMEM;
2596
8318d78a
JB		 2597 bss->band = local->hw.conf.channel->band;
2598 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2599
2600 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2601 local->hw.conf.beacon_int = 100;
f0706e82 2602 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2603 bss->last_update = jiffies;
2604 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2605
2606 if (sdata->default_key)
f0706e82 2607 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2608 else
f0706e82 2609 sdata->drop_unencrypted = 0;
988c0f72 2610
8318d78a 2611 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2612 pos = bss->supp_rates;
8318d78a
JB		 2613 for (i = 0; i < sband->n_bitrates; i++) {
2614 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2615 *pos++ = (u8) (rate / 5);
2616 }
2617
f698d856 2618 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2619 ieee80211_rx_bss_put(local, bss);
167ad6f7 2620 return ret;
f0706e82
JB		 2621}
2622
2623
f698d856 2624static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2625 struct ieee80211_if_sta *ifsta)
2626{
f698d856 2627 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2628 struct ieee80211_sta_bss *bss;
2629 int found = 0;
2630 u8 bssid[ETH_ALEN];
2631 int active_ibss;
0795af57
JP		 2632 DECLARE_MAC_BUF(mac);
2633 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2634
2635 if (ifsta->ssid_len == 0)
2636 return -EINVAL;
2637
f698d856 2638 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2639#ifdef CONFIG_MAC80211_IBSS_DEBUG
2640 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2641 sdata->dev->name, active_ibss);
f0706e82
JB		 2642#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2643 spin_lock_bh(&local->sta_bss_lock);
2644 list_for_each_entry(bss, &local->sta_bss_list, list) {
2645 if (ifsta->ssid_len != bss->ssid_len ||
2646 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2647 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2648 continue;
2649#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2650 printk(KERN_DEBUG " bssid=%s found\n",
2651 print_mac(mac, bss->bssid));
f0706e82
JB		 2652#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2653 memcpy(bssid, bss->bssid, ETH_ALEN);
2654 found = 1;
2655 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2656 break;
2657 }
2658 spin_unlock_bh(&local->sta_bss_lock);
2659
2660#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 2661 if (found)
2662 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2663 "%s\n", print_mac(mac, bssid),
2664 print_mac(mac2, ifsta->bssid));
f0706e82 2665#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2666
2667 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2668 int ret;
80693ceb
DD		 2669 int search_freq;
2670
2671 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2672 search_freq = bss->freq;
2673 else
2674 search_freq = local->hw.conf.channel->center_freq;
2675
f698d856 2676 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2677 ifsta->ssid, ifsta->ssid_len);
2678 if (!bss)
2679 goto dont_join;
2680
0795af57 2681 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2682 " based on configured SSID\n",
f698d856
JBG		 2683 sdata->dev->name, print_mac(mac, bssid));
2684 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2685 ieee80211_rx_bss_put(local, bss);
167ad6f7 2686 return ret;
f0706e82 2687 }
80693ceb
DD		 2688
2689dont_join:
f0706e82
JB		 2690#ifdef CONFIG_MAC80211_IBSS_DEBUG
2691 printk(KERN_DEBUG " did not try to join ibss\n");
2692#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2693
2694 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2695 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2696 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2697 mod_timer(&ifsta->timer, jiffies +
2698 IEEE80211_IBSS_MERGE_INTERVAL);
2699 } else if (time_after(jiffies, local->last_scan_completed +
2700 IEEE80211_SCAN_INTERVAL)) {
2701 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 2702 "join\n", sdata->dev->name);
2703 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 2704 ifsta->ssid_len);
48c2fc59 2705 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2706 int interval = IEEE80211_SCAN_INTERVAL;
2707
2708 if (time_after(jiffies, ifsta->ibss_join_req +
2709 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2710 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2711 (!(local->oper_channel->flags &
2712 IEEE80211_CHAN_NO_IBSS)))
f698d856 2713 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2714 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2715 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2716 " %d MHz\n", sdata->dev->name,
8318d78a 2717 local->hw.conf.channel->center_freq);
f0706e82
JB		 2718 }
2719
2720 /* No IBSS found - decrease scan interval and continue
2721 * scanning. */
2722 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2723 }
2724
48c2fc59 2725 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2726 mod_timer(&ifsta->timer, jiffies + interval);
2727 return 0;
2728 }
2729
2730 return 0;
2731}
2732
2733
f698d856 2734int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
f0706e82 2735{
f0706e82 2736 struct ieee80211_if_sta *ifsta;
9d139c81 2737 int res;
f0706e82
JB		 2738
2739 if (len > IEEE80211_MAX_SSID_LEN)
2740 return -EINVAL;
2741
f0706e82
JB		 2742 ifsta = &sdata->u.sta;
2743
9d139c81
JB		 2744 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2745 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2746 memcpy(ifsta->ssid, ssid, len);
2747 ifsta->ssid_len = len;
d6f2da5b 2748 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 2749
2750 res = 0;
2751 /*
2752 * Hack! MLME code needs to be cleaned up to have different
2753 * entry points for configuration and internal selection change
2754 */
2755 if (netif_running(sdata->dev))
2756 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2757 if (res) {
2758 printk(KERN_DEBUG "%s: Failed to config new SSID to "
f698d856 2759 "the low-level driver\n", sdata->dev->name);
9d139c81
JB		 2760 return res;
2761 }
2762 }
f0706e82 2763
d6f2da5b
JS		 2764 if (len)
2765 ifsta->flags |= IEEE80211_STA_SSID_SET;
2766 else
2767 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 2768
51fb61e7 2769 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 2770 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82 2771 ifsta->ibss_join_req = jiffies;
48c2fc59 2772 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f698d856 2773 return ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 2774 }
9d139c81 2775
f0706e82
JB		 2776 return 0;
2777}
2778
2779
f698d856 2780int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
f0706e82 2781{
f0706e82
JB		 2782 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2783 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2784 *len = ifsta->ssid_len;
2785 return 0;
2786}
2787
2788
f698d856 2789int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
f0706e82 2790{
f0706e82
JB		 2791 struct ieee80211_if_sta *ifsta;
2792 int res;
2793
f0706e82
JB		 2794 ifsta = &sdata->u.sta;
2795
2796 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2797 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 2798 res = 0;
2799 /*
2800 * Hack! See also ieee80211_sta_set_ssid.
2801 */
2802 if (netif_running(sdata->dev))
2803 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 2804 if (res) {
2805 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
f698d856 2806 "the low-level driver\n", sdata->dev->name);
f0706e82
JB		 2807 return res;
2808 }
2809 }
2810
d6f2da5b
JS		 2811 if (is_valid_ether_addr(bssid))
2812 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2813 else
d6f2da5b
JS		 2814 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2815
f0706e82
JB		 2816 return 0;
2817}
2818
2819
f698d856 2820int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
f0706e82 2821{
f0706e82 2822 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 2823
f0706e82
JB		 2824 kfree(ifsta->extra_ie);
2825 if (len == 0) {
2826 ifsta->extra_ie = NULL;
2827 ifsta->extra_ie_len = 0;
2828 return 0;
2829 }
2830 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2831 if (!ifsta->extra_ie) {
2832 ifsta->extra_ie_len = 0;
2833 return -ENOMEM;
2834 }
2835 memcpy(ifsta->extra_ie, ie, len);
2836 ifsta->extra_ie_len = len;
2837 return 0;
2838}
2839
2840
f698d856 2841struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2842 struct sk_buff *skb, u8 *bssid,
87291c02 2843 u8 *addr, u64 supp_rates)
f0706e82 2844{
f698d856 2845 struct ieee80211_local *local = sdata->local;
f0706e82 2846 struct sta_info *sta;
0795af57 2847 DECLARE_MAC_BUF(mac);
87291c02 2848 int band = local->hw.conf.channel->band;
f0706e82
JB		 2849
2850 /* TODO: Could consider removing the least recently used entry and
2851 * allow new one to be added. */
2852 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2853 if (net_ratelimit()) {
2854 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 2855 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 2856 }
2857 return NULL;
2858 }
2859
1e188637 2860 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2861 return NULL;
2862
f4ea83dd 2863#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 2864 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 2865 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 2866#endif
f0706e82 2867
73651ee6
JB		 2868 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2869 if (!sta)
f0706e82
JB		 2870 return NULL;
2871
07346f81 2872 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2873
8e1535d5
EG		 2874 /* make sure mandatory rates are always added */
2875 sta->supp_rates[band] = supp_rates |
2876 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 2877
2878 rate_control_rate_init(sta, local);
2879
93e5deb1 2880 if (sta_info_insert(sta))
73651ee6 2881 return NULL;
73651ee6 2882
d0709a65 2883 return sta;
f0706e82
JB		 2884}
2885
2886
60f8b39c
JB		 2887static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2888 struct ieee80211_if_sta *ifsta)
2889{
2890 struct ieee80211_local *local = sdata->local;
2891 struct ieee80211_sta_bss *bss, *selected = NULL;
2892 int top_rssi = 0, freq;
2893
2894 spin_lock_bh(&local->sta_bss_lock);
2895 freq = local->oper_channel->center_freq;
2896 list_for_each_entry(bss, &local->sta_bss_list, list) {
2897 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2898 continue;
2899
2900 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2901 IEEE80211_STA_AUTO_BSSID_SEL |
2902 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2903 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2904 !!sdata->default_key))
2905 continue;
2906
2907 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2908 bss->freq != freq)
2909 continue;
2910
2911 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2912 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2913 continue;
2914
2915 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2916 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2917 continue;
2918
2919 if (!selected || top_rssi < bss->signal) {
2920 selected = bss;
2921 top_rssi = bss->signal;
2922 }
2923 }
2924 if (selected)
2925 atomic_inc(&selected->users);
2926 spin_unlock_bh(&local->sta_bss_lock);
2927
2928 if (selected) {
2929 ieee80211_set_freq(sdata, selected->freq);
2930 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2931 ieee80211_sta_set_ssid(sdata, selected->ssid,
2932 selected->ssid_len);
2933 ieee80211_sta_set_bssid(sdata, selected->bssid);
b079ada7 2934 ieee80211_sta_def_wmm_params(sdata, selected);
60f8b39c
JB		 2935
2936 /* Send out direct probe if no probe resp was received or
2937 * the one we have is outdated
2938 */
2939 if (!selected->last_probe_resp ||
2940 time_after(jiffies, selected->last_probe_resp
2941 + IEEE80211_SCAN_RESULT_EXPIRE))
2942 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2943 else
2944 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2945
2946 ieee80211_rx_bss_put(local, selected);
2947 ieee80211_sta_reset_auth(sdata, ifsta);
2948 return 0;
2949 } else {
2950 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2951 ifsta->assoc_scan_tries++;
2952 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2953 ieee80211_sta_start_scan(sdata, NULL, 0);
2954 else
2955 ieee80211_sta_start_scan(sdata, ifsta->ssid,
2956 ifsta->ssid_len);
2957 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2958 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2959 } else
2960 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2961 }
2962 return -1;
2963}
2964
2965
f698d856 2966int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2967{
f0706e82
JB		 2968 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2969
f4ea83dd 2970 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2971 sdata->dev->name, reason);
f0706e82 2972
51fb61e7
JB		 2973 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2974 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 2975 return -EINVAL;
2976
aa458d17 2977 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2978 return 0;
2979}
2980
2981
f698d856 2982int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2983{
f0706e82
JB		 2984 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2985
f4ea83dd 2986 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2987 sdata->dev->name, reason);
f0706e82 2988
51fb61e7 2989 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2990 return -EINVAL;
2991
d6f2da5b 2992 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2993 return -1;
2994
aa458d17 2995 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2996 return 0;
2997}
84363e6e
MA		 2998
2999void ieee80211_notify_mac(struct ieee80211_hw *hw,
3000 enum ieee80211_notification_types notif_type)
3001{
3002 struct ieee80211_local *local = hw_to_local(hw);
3003 struct ieee80211_sub_if_data *sdata;
3004
3005 switch (notif_type) {
3006 case IEEE80211_NOTIFY_RE_ASSOC:
3007 rcu_read_lock();
3008 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 3009 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3010 continue;
84363e6e 3011
f698d856 3012 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 3013 }
3014 rcu_read_unlock();
3015 break;
3016 }
3017}
3018EXPORT_SYMBOL(ieee80211_notify_mac);
60f8b39c
JB		 3019
3020void ieee80211_sta_work(struct work_struct *work)
3021{
3022 struct ieee80211_sub_if_data *sdata =
3023 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3024 struct ieee80211_local *local = sdata->local;
3025 struct ieee80211_if_sta *ifsta;
3026 struct sk_buff *skb;
3027
3028 if (!netif_running(sdata->dev))
3029 return;
3030
3031 if (local->sta_sw_scanning || local->sta_hw_scanning)
3032 return;
3033
3034 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3035 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3036 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3037 return;
3038 ifsta = &sdata->u.sta;
3039
3040 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3041 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3042
3043#ifdef CONFIG_MAC80211_MESH
3044 if (ifsta->preq_queue_len &&
3045 time_after(jiffies,
3046 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3047 mesh_path_start_discovery(sdata);
3048#endif
3049
3050 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3051 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3052 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3053 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0fe8b33 3054 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
60f8b39c
JB		 3055 return;
3056 }
3057
3058 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3059 if (ieee80211_sta_config_auth(sdata, ifsta))
3060 return;
3061 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3062 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3063 return;
3064
3065 switch (ifsta->state) {
3066 case IEEE80211_STA_MLME_DISABLED:
3067 break;
3068 case IEEE80211_STA_MLME_DIRECT_PROBE:
3069 ieee80211_direct_probe(sdata, ifsta);
3070 break;
3071 case IEEE80211_STA_MLME_AUTHENTICATE:
3072 ieee80211_authenticate(sdata, ifsta);
3073 break;
3074 case IEEE80211_STA_MLME_ASSOCIATE:
3075 ieee80211_associate(sdata, ifsta);
3076 break;
3077 case IEEE80211_STA_MLME_ASSOCIATED:
3078 ieee80211_associated(sdata, ifsta);
3079 break;
3080 case IEEE80211_STA_MLME_IBSS_SEARCH:
3081 ieee80211_sta_find_ibss(sdata, ifsta);
3082 break;
3083 case IEEE80211_STA_MLME_IBSS_JOINED:
3084 ieee80211_sta_merge_ibss(sdata, ifsta);
3085 break;
3086#ifdef CONFIG_MAC80211_MESH
3087 case IEEE80211_STA_MLME_MESH_UP:
3088 ieee80211_mesh_housekeeping(sdata, ifsta);
3089 break;
3090#endif
3091 default:
3092 WARN_ON(1);
3093 break;
3094 }
3095
3096 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3097 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3098 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3099
3100 ieee80211_set_disassoc(sdata, ifsta, false, true,
3101 WLAN_REASON_UNSPECIFIED);
3102 }
3103}
0a51b27e
JB		 3104
3105void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3106{
3107 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3108 struct ieee80211_if_sta *ifsta;
3109
3110 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3111 ifsta = &sdata->u.sta;
3112 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3113 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3114 !ieee80211_sta_active_ibss(sdata)))
3115 ieee80211_sta_find_ibss(sdata, ifsta);
3116 }
3117}
Linux 6.x block layer and io_uring tree(s)