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mac80211: simplify scan start
[mirror_ubuntu-zesty-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
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,
e2839d8f
VK		 191 struct ieee80211_sta_bss *bss,
192 int ibss)
193{
e2839d8f
VK		 194 struct ieee80211_local *local = sdata->local;
195 int i, have_higher_than_11mbit = 0;
196
197
198 /* cf. IEEE 802.11 9.2.12 */
199 for (i = 0; i < bss->supp_rates_len; i++)
200 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
201 have_higher_than_11mbit = 1;
202
203 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
204 have_higher_than_11mbit)
205 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
206 else
207 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
208
209
210 if (local->ops->conf_tx) {
211 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 212
213 memset(&qparam, 0, sizeof(qparam));
214
215 qparam.aifs = 2;
216
217 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
218 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
219 qparam.cw_min = 31;
220 else
221 qparam.cw_min = 15;
222
223 qparam.cw_max = 1023;
224 qparam.txop = 0;
225
e100bb64
JB		 226 for (i = 0; i < local_to_hw(local)->queues; i++)
227 local->ops->conf_tx(local_to_hw(local), i, &qparam);
e2839d8f
VK		 228 }
229}
230
f698d856 231static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 232 struct ieee80211_if_sta *ifsta,
233 u8 *wmm_param, size_t wmm_param_len)
234{
f0706e82
JB		 235 struct ieee80211_tx_queue_params params;
236 size_t left;
237 int count;
238 u8 *pos;
239
3434fbd3
JB		 240 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
241 return;
242
243 if (!wmm_param)
244 return;
245
f0706e82
JB		 246 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
247 return;
248 count = wmm_param[6] & 0x0f;
249 if (count == ifsta->wmm_last_param_set)
250 return;
251 ifsta->wmm_last_param_set = count;
252
253 pos = wmm_param + 8;
254 left = wmm_param_len - 8;
255
256 memset(&params, 0, sizeof(params));
257
258 if (!local->ops->conf_tx)
259 return;
260
261 local->wmm_acm = 0;
262 for (; left >= 4; left -= 4, pos += 4) {
263 int aci = (pos[0] >> 5) & 0x03;
264 int acm = (pos[0] >> 4) & 0x01;
265 int queue;
266
267 switch (aci) {
268 case 1:
e100bb64 269 queue = 3;
988c0f72 270 if (acm)
f0706e82 271 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 272 break;
273 case 2:
e100bb64 274 queue = 1;
988c0f72 275 if (acm)
f0706e82 276 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 277 break;
278 case 3:
e100bb64 279 queue = 0;
988c0f72 280 if (acm)
f0706e82 281 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 282 break;
283 case 0:
284 default:
e100bb64 285 queue = 2;
988c0f72 286 if (acm)
f0706e82 287 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 288 break;
289 }
290
291 params.aifs = pos[0] & 0x0f;
292 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
293 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 294 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 295#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 296 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 297 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 298 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 299 params.cw_max, params.txop);
300#endif
f0706e82
JB		 301 /* TODO: handle ACM (block TX, fallback to next lowest allowed
302 * AC for now) */
303 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
304 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 305 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 306 }
307 }
308}
309
50c4afb9
JL		 310static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
311 bool use_protection,
312 bool use_short_preamble)
5628221c 313{
471b3efd 314 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 315#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 316 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 317 DECLARE_MAC_BUF(mac);
ebd74487 318#endif
471b3efd 319 u32 changed = 0;
5628221c 320
471b3efd 321 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 322#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 325 "%s)\n",
471b3efd 326 sdata->dev->name,
5628221c 327 use_protection ? "enabled" : "disabled",
0795af57 328 print_mac(mac, ifsta->bssid));
5628221c 329 }
f4ea83dd 330#endif
471b3efd
JB		 331 bss_conf->use_cts_prot = use_protection;
332 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 333 }
7e9ed188 334
d43c7b37 335 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 336#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 337 if (net_ratelimit()) {
338 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 339 " (BSSID=%s)\n",
471b3efd 340 sdata->dev->name,
d43c7b37 341 use_short_preamble ? "short" : "long",
0795af57 342 print_mac(mac, ifsta->bssid));
7e9ed188 343 }
f4ea83dd 344#endif
d43c7b37 345 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 346 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 347 }
d9430a32 348
471b3efd 349 return changed;
5628221c
DD		 350}
351
50c4afb9
JL		 352static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
353 u8 erp_value)
354{
355 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
356 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
357
358 return ieee80211_handle_protect_preamb(sdata,
359 use_protection, use_short_preamble);
360}
361
362static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
363 struct ieee80211_sta_bss *bss)
364{
365 u32 changed = 0;
366
367 if (bss->has_erp_value)
368 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
369 else {
370 u16 capab = bss->capability;
371 changed |= ieee80211_handle_protect_preamb(sdata, false,
372 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
373 }
374
375 return changed;
376}
377
f5e5bf25
TW		 378static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
379 struct ieee80211_if_sta *ifsta)
380{
381 union iwreq_data wrqu;
382 memset(&wrqu, 0, sizeof(wrqu));
383 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
384 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
385 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
386 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
387}
388
f698d856 389static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 390 struct ieee80211_if_sta *ifsta)
391{
f0706e82
JB		 392 union iwreq_data wrqu;
393
f0706e82 394 if (ifsta->assocreq_ies) {
087d833e
JM		 395 memset(&wrqu, 0, sizeof(wrqu));
396 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 397 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 398 ifsta->assocreq_ies);
f0706e82 399 }
087d833e
JM		 400 if (ifsta->assocresp_ies) {
401 memset(&wrqu, 0, sizeof(wrqu));
402 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 403 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 404 ifsta->assocresp_ies);
f0706e82 405 }
f0706e82
JB		 406}
407
408
f698d856 409static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 410 struct ieee80211_if_sta *ifsta)
f0706e82 411{
471b3efd 412 struct ieee80211_local *local = sdata->local;
38668c05 413 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 414 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 415
f5e5bf25 416 struct ieee80211_sta_bss *bss;
d6f2da5b 417
f5e5bf25 418 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 419
f5e5bf25
TW		 420 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
421 return;
21c0cbe7 422
f5e5bf25
TW		 423 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
424 conf->channel->center_freq,
425 ifsta->ssid, ifsta->ssid_len);
426 if (bss) {
427 /* set timing information */
428 sdata->bss_conf.beacon_int = bss->beacon_int;
429 sdata->bss_conf.timestamp = bss->timestamp;
430 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 431
f5e5bf25 432 changed |= ieee80211_handle_bss_capability(sdata, bss);
5628221c 433
f5e5bf25
TW		 434 ieee80211_rx_bss_put(local, bss);
435 }
38668c05 436
f5e5bf25
TW		 437 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
438 changed |= BSS_CHANGED_HT;
439 sdata->bss_conf.assoc_ht = 1;
440 sdata->bss_conf.ht_conf = &conf->ht_conf;
441 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
442 }
38668c05 443
f5e5bf25
TW		 444 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
445 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
446 ieee80211_sta_send_associnfo(sdata, ifsta);
38668c05 447
f0706e82 448 ifsta->last_probe = jiffies;
f5e5bf25 449 ieee80211_led_assoc(local, 1);
471b3efd 450
f5e5bf25 451 sdata->bss_conf.assoc = 1;
471b3efd 452 ieee80211_bss_info_change_notify(sdata, changed);
8db9369f 453
24e64622 454 netif_tx_start_all_queues(sdata->dev);
f5e5bf25 455 netif_carrier_on(sdata->dev);
8db9369f 456
f5e5bf25 457 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 458}
459
9859b81e
RR		 460static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
461 struct ieee80211_if_sta *ifsta)
462{
463 DECLARE_MAC_BUF(mac);
464
465 ifsta->direct_probe_tries++;
466 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
467 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
468 sdata->dev->name, print_mac(mac, ifsta->bssid));
469 ifsta->state = IEEE80211_STA_MLME_DISABLED;
470 return;
471 }
472
473 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
474 sdata->dev->name, print_mac(mac, ifsta->bssid),
475 ifsta->direct_probe_tries);
476
477 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
478
479 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
480
481 /* Direct probe is sent to broadcast address as some APs
482 * will not answer to direct packet in unassociated state.
483 */
484 ieee80211_send_probe_req(sdata, NULL,
485 ifsta->ssid, ifsta->ssid_len);
486
487 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
488}
489
f0706e82 490
f698d856 491static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 492 struct ieee80211_if_sta *ifsta)
493{
0795af57
JP		 494 DECLARE_MAC_BUF(mac);
495
f0706e82
JB		 496 ifsta->auth_tries++;
497 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 498 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 499 " timed out\n",
f698d856 500 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 501 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 502 return;
503 }
504
48c2fc59 505 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0795af57 506 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
f698d856 507 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 508
f698d856 509 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
f0706e82
JB		 510
511 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
512}
513
36d16ae7
HS		 514static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
515 struct ieee80211_supported_band *sband,
516 u64 *rates)
517{
518 int i, j, count;
519 *rates = 0;
520 count = 0;
521 for (i = 0; i < bss->supp_rates_len; i++) {
522 int rate = (bss->supp_rates[i] & 0x7F) * 5;
523
524 for (j = 0; j < sband->n_bitrates; j++)
525 if (sband->bitrates[j].bitrate == rate) {
526 *rates |= BIT(j);
527 count++;
528 break;
529 }
530 }
531
532 return count;
533}
f0706e82 534
f698d856 535static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 536 struct ieee80211_if_sta *ifsta)
537{
f698d856 538 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 539 struct sk_buff *skb;
540 struct ieee80211_mgmt *mgmt;
43ac2ca3 541 u8 *pos, *ies, *ht_add_ie;
36d16ae7 542 int i, len, count, rates_len, supp_rates_len;
f0706e82
JB		 543 u16 capab;
544 struct ieee80211_sta_bss *bss;
545 int wmm = 0;
8318d78a 546 struct ieee80211_supported_band *sband;
36d16ae7 547 u64 rates = 0;
f0706e82
JB		 548
549 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
550 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
551 ifsta->ssid_len);
552 if (!skb) {
553 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
f698d856 554 "frame\n", sdata->dev->name);
f0706e82
JB		 555 return;
556 }
557 skb_reserve(skb, local->hw.extra_tx_headroom);
558
8318d78a
JB		 559 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
560
f0706e82 561 capab = ifsta->capab;
8318d78a
JB		 562
563 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
564 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
565 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
566 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
567 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 568 }
8318d78a 569
f698d856 570 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 571 local->hw.conf.channel->center_freq,
cffdd30d 572 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 573 if (bss) {
574 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
575 capab |= WLAN_CAPABILITY_PRIVACY;
43ac2ca3 576 if (bss->wmm_used)
f0706e82 577 wmm = 1;
0d580a77
HS		 578
579 /* get all rates supported by the device and the AP as
580 * some APs don't like getting a superset of their rates
581 * in the association request (e.g. D-Link DAP 1353 in
582 * b-only mode) */
583 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
584
06ff47bc
TW		 585 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
586 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
587 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
588
3e122be0 589 ieee80211_rx_bss_put(local, bss);
0d580a77
HS		 590 } else {
591 rates = ~0;
592 rates_len = sband->n_bitrates;
f0706e82
JB		 593 }
594
595 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
596 memset(mgmt, 0, 24);
597 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 598 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 599 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
600
d6f2da5b 601 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82 602 skb_put(skb, 10);
e7827a70
HH		 603 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
604 IEEE80211_STYPE_REASSOC_REQ);
f0706e82 605 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 606 mgmt->u.reassoc_req.listen_interval =
607 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 608 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
609 ETH_ALEN);
610 } else {
611 skb_put(skb, 4);
e7827a70
HH		 612 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
613 IEEE80211_STYPE_ASSOC_REQ);
f0706e82 614 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 615 mgmt->u.reassoc_req.listen_interval =
616 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 617 }
618
619 /* SSID */
620 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
621 *pos++ = WLAN_EID_SSID;
622 *pos++ = ifsta->ssid_len;
623 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
624
0d580a77 625 /* add all rates which were marked to be used above */
36d16ae7
HS		 626 supp_rates_len = rates_len;
627 if (supp_rates_len > 8)
628 supp_rates_len = 8;
629
8318d78a 630 len = sband->n_bitrates;
36d16ae7 631 pos = skb_put(skb, supp_rates_len + 2);
f0706e82 632 *pos++ = WLAN_EID_SUPP_RATES;
36d16ae7 633 *pos++ = supp_rates_len;
f0706e82 634
36d16ae7
HS		 635 count = 0;
636 for (i = 0; i < sband->n_bitrates; i++) {
637 if (BIT(i) & rates) {
8318d78a 638 int rate = sband->bitrates[i].bitrate;
f0706e82 639 *pos++ = (u8) (rate / 5);
36d16ae7
HS		 640 if (++count == 8)
641 break;
642 }
643 }
644
8ab65b03 645 if (rates_len > count) {
36d16ae7
HS		 646 pos = skb_put(skb, rates_len - count + 2);
647 *pos++ = WLAN_EID_EXT_SUPP_RATES;
648 *pos++ = rates_len - count;
649
650 for (i++; i < sband->n_bitrates; i++) {
651 if (BIT(i) & rates) {
652 int rate = sband->bitrates[i].bitrate;
653 *pos++ = (u8) (rate / 5);
654 }
f0706e82
JB		 655 }
656 }
657
06ff47bc
TW		 658 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
659 /* 1. power capabilities */
660 pos = skb_put(skb, 4);
661 *pos++ = WLAN_EID_PWR_CAPABILITY;
662 *pos++ = 2;
663 *pos++ = 0; /* min tx power */
664 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
665
666 /* 2. supported channels */
667 /* TODO: get this in reg domain format */
668 pos = skb_put(skb, 2 * sband->n_channels + 2);
669 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
670 *pos++ = 2 * sband->n_channels;
671 for (i = 0; i < sband->n_channels; i++) {
672 *pos++ = ieee80211_frequency_to_channel(
673 sband->channels[i].center_freq);
674 *pos++ = 1; /* one channel in the subband*/
675 }
676 }
677
f0706e82
JB		 678 if (ifsta->extra_ie) {
679 pos = skb_put(skb, ifsta->extra_ie_len);
680 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
681 }
682
d6f2da5b 683 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 684 pos = skb_put(skb, 9);
685 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
686 *pos++ = 7; /* len */
687 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
688 *pos++ = 0x50;
689 *pos++ = 0xf2;
690 *pos++ = 2; /* WME */
691 *pos++ = 0; /* WME info */
692 *pos++ = 1; /* WME ver */
693 *pos++ = 0;
694 }
3434fbd3 695
c7153508 696 /* wmm support is a must to HT */
3434fbd3 697 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
43ac2ca3
JM		 698 sband->ht_info.ht_supported &&
699 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
9306102e 700 struct ieee80211_ht_addt_info *ht_add_info =
43ac2ca3 701 (struct ieee80211_ht_addt_info *)ht_add_ie;
9306102e
EG		 702 u16 cap = sband->ht_info.cap;
703 __le16 tmp;
704 u32 flags = local->hw.conf.channel->flags;
705
706 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
707 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
708 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
709 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
710 cap &= ~IEEE80211_HT_CAP_SGI_40;
711 }
712 break;
713 case IEEE80211_HT_IE_CHA_SEC_BELOW:
714 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
715 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
716 cap &= ~IEEE80211_HT_CAP_SGI_40;
717 }
718 break;
719 }
720
721 tmp = cpu_to_le16(cap);
c7153508
RR		 722 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
723 *pos++ = WLAN_EID_HT_CAPABILITY;
724 *pos++ = sizeof(struct ieee80211_ht_cap);
725 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
726 memcpy(pos, &tmp, sizeof(u16));
727 pos += sizeof(u16);
8318d78a
JB		 728 /* TODO: needs a define here for << 2 */
729 *pos++ = sband->ht_info.ampdu_factor |
730 (sband->ht_info.ampdu_density << 2);
731 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 732 }
f0706e82
JB		 733
734 kfree(ifsta->assocreq_ies);
735 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 736 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 737 if (ifsta->assocreq_ies)
738 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
739
f698d856 740 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 741}
742
743
f698d856 744static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 745 struct ieee80211_if_sta *ifsta, u16 reason)
746{
f698d856 747 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 748 struct sk_buff *skb;
749 struct ieee80211_mgmt *mgmt;
750
751 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
752 if (!skb) {
753 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
f698d856 754 "frame\n", sdata->dev->name);
f0706e82
JB		 755 return;
756 }
757 skb_reserve(skb, local->hw.extra_tx_headroom);
758
759 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
760 memset(mgmt, 0, 24);
761 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 762 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 763 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 764 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
765 IEEE80211_STYPE_DEAUTH);
f0706e82
JB		 766 skb_put(skb, 2);
767 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
768
f698d856 769 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 770}
771
60f8b39c
JB		 772static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
773{
774 if (!sdata || !sdata->default_key ||
775 sdata->default_key->conf.alg != ALG_WEP)
776 return 0;
777 return 1;
778}
f0706e82 779
f698d856 780static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 781 struct ieee80211_if_sta *ifsta, u16 reason)
782{
f698d856 783 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 784 struct sk_buff *skb;
785 struct ieee80211_mgmt *mgmt;
786
787 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
788 if (!skb) {
789 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
f698d856 790 "frame\n", sdata->dev->name);
f0706e82
JB		 791 return;
792 }
793 skb_reserve(skb, local->hw.extra_tx_headroom);
794
795 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
796 memset(mgmt, 0, 24);
797 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 798 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 799 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 800 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
801 IEEE80211_STYPE_DISASSOC);
f0706e82
JB		 802 skb_put(skb, 2);
803 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
804
f698d856 805 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 806}
807
aa458d17
TW		 808static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
809 struct ieee80211_if_sta *ifsta, bool deauth,
810 bool self_disconnected, u16 reason)
811{
812 struct ieee80211_local *local = sdata->local;
813 struct sta_info *sta;
f5e5bf25 814 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 815
816 rcu_read_lock();
817
818 sta = sta_info_get(local, ifsta->bssid);
819 if (!sta) {
820 rcu_read_unlock();
821 return;
822 }
823
824 if (deauth) {
825 ifsta->direct_probe_tries = 0;
826 ifsta->auth_tries = 0;
827 }
828 ifsta->assoc_scan_tries = 0;
829 ifsta->assoc_tries = 0;
830
24e64622 831 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 832 netif_carrier_off(sdata->dev);
833
834 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
835
836 if (self_disconnected) {
837 if (deauth)
838 ieee80211_send_deauth(sdata, ifsta, reason);
839 else
840 ieee80211_send_disassoc(sdata, ifsta, reason);
841 }
842
f5e5bf25
TW		 843 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
844 changed |= ieee80211_reset_erp_info(sdata);
845
846 if (sdata->bss_conf.assoc_ht)
847 changed |= BSS_CHANGED_HT;
848
849 sdata->bss_conf.assoc_ht = 0;
850 sdata->bss_conf.ht_conf = NULL;
851 sdata->bss_conf.ht_bss_conf = NULL;
852
853 ieee80211_led_assoc(local, 0);
854 sdata->bss_conf.assoc = 0;
855
856 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 857
858 if (self_disconnected)
859 ifsta->state = IEEE80211_STA_MLME_DISABLED;
860
861 sta_info_unlink(&sta);
862
863 rcu_read_unlock();
864
865 sta_info_destroy(sta);
866}
f0706e82 867
f698d856 868static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 869 struct ieee80211_if_sta *ifsta)
870{
f698d856 871 struct ieee80211_local *local = sdata->local;
f0706e82 872 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 873 int bss_privacy;
874 int wep_privacy;
875 int privacy_invoked;
f0706e82 876
5b98b1f7 877 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 878 return 0;
879
f698d856 880 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 881 local->hw.conf.channel->center_freq,
cffdd30d 882 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 883 if (!bss)
884 return 0;
885
5b98b1f7 886 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 887 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 888 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 889
3e122be0 890 ieee80211_rx_bss_put(local, bss);
f0706e82 891
5b98b1f7
JB		 892 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
893 return 0;
894
895 return 1;
f0706e82
JB		 896}
897
f698d856 898static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 899 struct ieee80211_if_sta *ifsta)
900{
0795af57
JP		 901 DECLARE_MAC_BUF(mac);
902
f0706e82
JB		 903 ifsta->assoc_tries++;
904 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 905 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 906 " timed out\n",
f698d856 907 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 908 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 909 return;
910 }
911
48c2fc59 912 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 913 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 914 sdata->dev->name, print_mac(mac, ifsta->bssid));
915 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 916 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 917 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 918 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 919 return;
920 }
921
f698d856 922 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 923
924 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
925}
926
927
f698d856 928static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 929 struct ieee80211_if_sta *ifsta)
930{
f698d856 931 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 932 struct sta_info *sta;
933 int disassoc;
0795af57 934 DECLARE_MAC_BUF(mac);
f0706e82
JB		 935
936 /* TODO: start monitoring current AP signal quality and number of
937 * missed beacons. Scan other channels every now and then and search
938 * for better APs. */
939 /* TODO: remove expired BSSes */
940
48c2fc59 941 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 942
d0709a65
JB		 943 rcu_read_lock();
944
f0706e82
JB		 945 sta = sta_info_get(local, ifsta->bssid);
946 if (!sta) {
0795af57 947 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 948 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 949 disassoc = 1;
950 } else {
951 disassoc = 0;
952 if (time_after(jiffies,
953 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 954 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 955 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 956 "current AP %s - assume out of "
f0706e82 957 "range\n",
f698d856 958 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 959 disassoc = 1;
d6f2da5b 960 } else
f698d856 961 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 962 local->scan_ssid,
963 local->scan_ssid_len);
d6f2da5b 964 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 965 } else {
d6f2da5b 966 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 967 if (time_after(jiffies, ifsta->last_probe +
968 IEEE80211_PROBE_INTERVAL)) {
969 ifsta->last_probe = jiffies;
f698d856 970 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 971 ifsta->ssid,
972 ifsta->ssid_len);
973 }
974 }
f0706e82 975 }
d0709a65
JB		 976
977 rcu_read_unlock();
978
60f8b39c
JB		 979 if (disassoc)
980 ieee80211_set_disassoc(sdata, ifsta, true, true,
981 WLAN_REASON_PREV_AUTH_NOT_VALID);
982 else
983 mod_timer(&ifsta->timer, jiffies +
984 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 985}
986
987
f698d856 988static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 989 struct ieee80211_if_sta *ifsta)
990{
f698d856 991 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 992 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 993 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 994}
995
996
f698d856 997static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 998 struct ieee80211_if_sta *ifsta,
999 struct ieee80211_mgmt *mgmt,
1000 size_t len)
1001{
1002 u8 *pos;
1003 struct ieee802_11_elems elems;
1004
f0706e82 1005 pos = mgmt->u.auth.variable;
67a4cce4 1006 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1007 if (!elems.challenge)
f0706e82 1008 return;
f698d856 1009 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1010 elems.challenge_len + 2, 1);
1011}
1012
f698d856 1013static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
9f985b0e
RR		 1014 u8 dialog_token, u16 status, u16 policy,
1015 u16 buf_size, u16 timeout)
1016{
9f985b0e 1017 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 1018 struct ieee80211_local *local = sdata->local;
9f985b0e
RR		 1019 struct sk_buff *skb;
1020 struct ieee80211_mgmt *mgmt;
1021 u16 capab;
1022
3acea5b6
EK		 1023 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1024
9f985b0e
RR		 1025 if (!skb) {
1026 printk(KERN_DEBUG "%s: failed to allocate buffer "
f698d856 1027 "for addba resp frame\n", sdata->dev->name);
9f985b0e
RR		 1028 return;
1029 }
1030
1031 skb_reserve(skb, local->hw.extra_tx_headroom);
1032 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1033 memset(mgmt, 0, 24);
1034 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1035 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1036 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1037 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
9f985b0e
RR		 1038 else
1039 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1040 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1041 IEEE80211_STYPE_ACTION);
9f985b0e
RR		 1042
1043 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1044 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1045 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1046 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1047
1048 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1049 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1050 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1051
1052 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1053 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1054 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1055
f698d856 1056 ieee80211_sta_tx(sdata, skb, 0);
9f985b0e
RR		 1057
1058 return;
1059}
1060
60f8b39c
JB		 1061/*
1062 * After accepting the AddBA Request we activated a timer,
1063 * resetting it after each frame that arrives from the originator.
1064 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1065 */
1066static void sta_rx_agg_session_timer_expired(unsigned long data)
1067{
1068 /* not an elegant detour, but there is no choice as the timer passes
1069 * only one argument, and various sta_info are needed here, so init
1070 * flow in sta_info_create gives the TID as data, while the timer_to_id
1071 * array gives the sta through container_of */
1072 u8 *ptid = (u8 *)data;
1073 u8 *timer_to_id = ptid - *ptid;
1074 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1075 timer_to_tid[0]);
1076
1077#ifdef CONFIG_MAC80211_HT_DEBUG
1078 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1079#endif
1080 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1081 (u16)*ptid, WLAN_BACK_TIMER,
1082 WLAN_REASON_QSTA_TIMEOUT);
1083}
1084
f698d856 1085static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
9f985b0e
RR		 1086 struct ieee80211_mgmt *mgmt,
1087 size_t len)
1088{
07db2183
RR		 1089 struct ieee80211_hw *hw = &local->hw;
1090 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1091 struct sta_info *sta;
07db2183
RR		 1092 struct tid_ampdu_rx *tid_agg_rx;
1093 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1094 u8 dialog_token;
07db2183
RR		 1095 int ret = -EOPNOTSUPP;
1096 DECLARE_MAC_BUF(mac);
9f985b0e 1097
d0709a65
JB		 1098 rcu_read_lock();
1099
9f985b0e 1100 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1101 if (!sta) {
1102 rcu_read_unlock();
9f985b0e 1103 return;
d0709a65 1104 }
9f985b0e
RR		 1105
1106 /* extract session parameters from addba request frame */
1107 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1108 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1109 start_seq_num =
1110 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1111
1112 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1113 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1114 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1115 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1116
9f985b0e
RR		 1117 status = WLAN_STATUS_REQUEST_DECLINED;
1118
07db2183
RR		 1119 /* sanity check for incoming parameters:
1120 * check if configuration can support the BA policy
1121 * and if buffer size does not exceeds max value */
1122 if (((ba_policy != 1)
1123 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1124 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1125 status = WLAN_STATUS_INVALID_QOS_PARAM;
1126#ifdef CONFIG_MAC80211_HT_DEBUG
1127 if (net_ratelimit())
7b9d44cd 1128 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1129 "%s on tid %u. policy %d, buffer size %d\n",
1130 print_mac(mac, mgmt->sa), tid, ba_policy,
1131 buf_size);
1132#endif /* CONFIG_MAC80211_HT_DEBUG */
1133 goto end_no_lock;
1134 }
1135 /* determine default buffer size */
1136 if (buf_size == 0) {
8318d78a
JB		 1137 struct ieee80211_supported_band *sband;
1138
1139 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1140 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1141 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1142 }
1143
07db2183
RR		 1144
1145 /* examine state machine */
07346f81 1146 spin_lock_bh(&sta->lock);
07db2183 1147
cee24a3e 1148 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1149#ifdef CONFIG_MAC80211_HT_DEBUG
1150 if (net_ratelimit())
7b9d44cd 1151 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1152 "%s on tid %u\n",
1153 print_mac(mac, mgmt->sa), tid);
1154#endif /* CONFIG_MAC80211_HT_DEBUG */
1155 goto end;
1156 }
1157
cee24a3e
RR		 1158 /* prepare A-MPDU MLME for Rx aggregation */
1159 sta->ampdu_mlme.tid_rx[tid] =
1160 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1161 if (!sta->ampdu_mlme.tid_rx[tid]) {
f4ea83dd 1162#ifdef CONFIG_MAC80211_HT_DEBUG
cee24a3e
RR		 1163 if (net_ratelimit())
1164 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1165 tid);
f4ea83dd 1166#endif
cee24a3e
RR		 1167 goto end;
1168 }
1169 /* rx timer */
1170 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1171 sta_rx_agg_session_timer_expired;
1172 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1173 (unsigned long)&sta->timer_to_tid[tid];
1174 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1175
1176 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1177
07db2183
RR		 1178 /* prepare reordering buffer */
1179 tid_agg_rx->reorder_buf =
c97c23e3 1180 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
03147dfc 1181 if (!tid_agg_rx->reorder_buf) {
f4ea83dd 1182#ifdef CONFIG_MAC80211_HT_DEBUG
03147dfc
JB		 1183 if (net_ratelimit())
1184 printk(KERN_ERR "can not allocate reordering buffer "
1185 "to tid %d\n", tid);
f4ea83dd 1186#endif
cee24a3e 1187 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1188 goto end;
1189 }
1190 memset(tid_agg_rx->reorder_buf, 0,
c97c23e3 1191 buf_size * sizeof(struct sk_buff *));
07db2183
RR		 1192
1193 if (local->ops->ampdu_action)
1194 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1195 sta->addr, tid, &start_seq_num);
07db2183 1196#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1197 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1198#endif /* CONFIG_MAC80211_HT_DEBUG */
1199
1200 if (ret) {
1201 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1202 kfree(tid_agg_rx);
1203 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1204 goto end;
1205 }
1206
1207 /* change state and send addba resp */
cee24a3e 1208 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1209 tid_agg_rx->dialog_token = dialog_token;
1210 tid_agg_rx->ssn = start_seq_num;
1211 tid_agg_rx->head_seq_num = start_seq_num;
1212 tid_agg_rx->buf_size = buf_size;
1213 tid_agg_rx->timeout = timeout;
1214 tid_agg_rx->stored_mpdu_num = 0;
1215 status = WLAN_STATUS_SUCCESS;
1216end:
07346f81 1217 spin_unlock_bh(&sta->lock);
07db2183
RR		 1218
1219end_no_lock:
f698d856 1220 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
d0709a65
JB		 1221 dialog_token, status, 1, buf_size, timeout);
1222 rcu_read_unlock();
9f985b0e 1223}
f0706e82 1224
f698d856 1225static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
eadc8d9e
RR		 1226 struct ieee80211_mgmt *mgmt,
1227 size_t len)
1228{
eadc8d9e
RR		 1229 struct ieee80211_hw *hw = &local->hw;
1230 struct sta_info *sta;
1231 u16 capab;
1232 u16 tid;
1233 u8 *state;
1234
d0709a65
JB		 1235 rcu_read_lock();
1236
eadc8d9e 1237 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1238 if (!sta) {
1239 rcu_read_unlock();
eadc8d9e 1240 return;
d0709a65 1241 }
eadc8d9e
RR		 1242
1243 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1244 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1245
cee24a3e 1246 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1247
07346f81 1248 spin_lock_bh(&sta->lock);
eadc8d9e 1249
cee24a3e 1250 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1251 spin_unlock_bh(&sta->lock);
cee24a3e
RR		 1252 goto addba_resp_exit;
1253 }
1254
eadc8d9e 1255 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1256 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
07346f81 1257 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1258#ifdef CONFIG_MAC80211_HT_DEBUG
1259 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1260#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1261 goto addba_resp_exit;
eadc8d9e
RR		 1262 }
1263
cee24a3e 1264 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1265#ifdef CONFIG_MAC80211_HT_DEBUG
1266 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1267#endif /* CONFIG_MAC80211_HT_DEBUG */
1268 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1269 == WLAN_STATUS_SUCCESS) {
eadc8d9e 1270 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1271 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e 1272
f4ea83dd 1273 if (*state == HT_AGG_STATE_OPERATIONAL)
eadc8d9e 1274 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
eadc8d9e 1275
07346f81 1276 spin_unlock_bh(&sta->lock);
eadc8d9e 1277 } else {
cee24a3e 1278 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1279 /* this will allow the state check in stop_BA_session */
1280 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1281 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1282 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1283 WLAN_BACK_INITIATOR);
1284 }
cee24a3e
RR		 1285
1286addba_resp_exit:
d0709a65 1287 rcu_read_unlock();
eadc8d9e
RR		 1288}
1289
f698d856 1290static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
688b88a4
RR		 1291 struct ieee80211_mgmt *mgmt, size_t len)
1292{
f698d856 1293 struct ieee80211_local *local = sdata->local;
688b88a4
RR		 1294 struct sta_info *sta;
1295 u16 tid, params;
1296 u16 initiator;
1297 DECLARE_MAC_BUF(mac);
1298
d0709a65
JB		 1299 rcu_read_lock();
1300
688b88a4 1301 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1302 if (!sta) {
1303 rcu_read_unlock();
688b88a4 1304 return;
d0709a65 1305 }
688b88a4
RR		 1306
1307 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1308 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1309 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1310
1311#ifdef CONFIG_MAC80211_HT_DEBUG
1312 if (net_ratelimit())
d92684e6
RR		 1313 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1314 print_mac(mac, mgmt->sa),
2e354ed7 1315 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1316 mgmt->u.action.u.delba.reason_code);
1317#endif /* CONFIG_MAC80211_HT_DEBUG */
1318
1319 if (initiator == WLAN_BACK_INITIATOR)
f698d856 1320 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
688b88a4 1321 WLAN_BACK_INITIATOR, 0);
d92684e6 1322 else { /* WLAN_BACK_RECIPIENT */
07346f81 1323 spin_lock_bh(&sta->lock);
cee24a3e 1324 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6 1325 HT_AGG_STATE_OPERATIONAL;
07346f81 1326 spin_unlock_bh(&sta->lock);
d92684e6
RR		 1327 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1328 WLAN_BACK_RECIPIENT);
1329 }
d0709a65 1330 rcu_read_unlock();
688b88a4
RR		 1331}
1332
f698d856 1333static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1334 struct ieee80211_msrment_ie *request_ie,
1335 const u8 *da, const u8 *bssid,
1336 u8 dialog_token)
1337{
f698d856 1338 struct ieee80211_local *local = sdata->local;
b6623486
AK		 1339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *msr_report;
1341
1342 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1343 sizeof(struct ieee80211_msrment_ie));
1344
1345 if (!skb) {
1346 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1347 "measurement report frame\n", sdata->dev->name);
b6623486
AK		 1348 return;
1349 }
1350
1351 skb_reserve(skb, local->hw.extra_tx_headroom);
1352 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1353 memset(msr_report, 0, 24);
1354 memcpy(msr_report->da, da, ETH_ALEN);
f698d856 1355 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
b6623486 1356 memcpy(msr_report->bssid, bssid, ETH_ALEN);
e7827a70 1357 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
b6623486
AK		 1358 IEEE80211_STYPE_ACTION);
1359
1360 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1361 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1362 msr_report->u.action.u.measurement.action_code =
1363 WLAN_ACTION_SPCT_MSR_RPRT;
1364 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1365
1366 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1367 msr_report->u.action.u.measurement.length =
1368 sizeof(struct ieee80211_msrment_ie);
1369
1370 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1371 sizeof(struct ieee80211_msrment_ie));
1372 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1373 msr_report->u.action.u.measurement.msr_elem.mode |=
1374 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1375 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1376
f698d856 1377 ieee80211_sta_tx(sdata, skb, 0);
b6623486
AK		 1378}
1379
f698d856 1380static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1381 struct ieee80211_mgmt *mgmt,
1382 size_t len)
1383{
1384 /*
1385 * Ignoring measurement request is spec violation.
1386 * Mandatory measurements must be reported optional
1387 * measurements might be refused or reported incapable
1388 * For now just refuse
1389 * TODO: Answer basic measurement as unmeasured
1390 */
f698d856 1391 ieee80211_send_refuse_measurement_request(sdata,
b6623486
AK		 1392 &mgmt->u.action.u.measurement.msr_elem,
1393 mgmt->sa, mgmt->bssid,
1394 mgmt->u.action.u.measurement.dialog_token);
1395}
1396
1397
f698d856 1398static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1399 struct ieee80211_if_sta *ifsta,
1400 struct ieee80211_mgmt *mgmt,
1401 size_t len)
1402{
f0706e82 1403 u16 auth_alg, auth_transaction, status_code;
0795af57 1404 DECLARE_MAC_BUF(mac);
f0706e82 1405
48c2fc59 1406 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 1407 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1408 return;
f0706e82 1409
f4ea83dd 1410 if (len < 24 + 6)
f0706e82 1411 return;
f0706e82 1412
51fb61e7 1413 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1414 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1415 return;
f0706e82 1416
51fb61e7 1417 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1418 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1419 return;
f0706e82
JB		 1420
1421 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1422 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1423 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1424
51fb61e7 1425 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1426 /*
1427 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1428 * networks and most implementations do not seem to use it.
1429 * However, try to reply to authentication attempts if someone
1430 * has actually implemented this.
135a2110 1431 */
f4ea83dd 1432 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1433 return;
f698d856 1434 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1435 }
1436
1437 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1438 auth_transaction != ifsta->auth_transaction)
f0706e82 1439 return;
f0706e82
JB		 1440
1441 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1442 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1443 u8 algs[3];
1444 const int num_algs = ARRAY_SIZE(algs);
1445 int i, pos;
1446 algs[0] = algs[1] = algs[2] = 0xff;
1447 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1448 algs[0] = WLAN_AUTH_OPEN;
1449 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1450 algs[1] = WLAN_AUTH_SHARED_KEY;
1451 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1452 algs[2] = WLAN_AUTH_LEAP;
1453 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1454 pos = 0;
1455 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1456 pos = 1;
1457 else
1458 pos = 2;
1459 for (i = 0; i < num_algs; i++) {
1460 pos++;
1461 if (pos >= num_algs)
1462 pos = 0;
1463 if (algs[pos] == ifsta->auth_alg ||
1464 algs[pos] == 0xff)
1465 continue;
1466 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1467 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1468 continue;
1469 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1470 break;
1471 }
1472 }
1473 return;
1474 }
1475
1476 switch (ifsta->auth_alg) {
1477 case WLAN_AUTH_OPEN:
1478 case WLAN_AUTH_LEAP:
f698d856 1479 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1480 break;
1481 case WLAN_AUTH_SHARED_KEY:
1482 if (ifsta->auth_transaction == 4)
f698d856 1483 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1484 else
f698d856 1485 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1486 break;
1487 }
1488}
1489
1490
f698d856 1491static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1492 struct ieee80211_if_sta *ifsta,
1493 struct ieee80211_mgmt *mgmt,
1494 size_t len)
1495{
1496 u16 reason_code;
0795af57 1497 DECLARE_MAC_BUF(mac);
f0706e82 1498
f4ea83dd 1499 if (len < 24 + 2)
f0706e82 1500 return;
f0706e82 1501
f4ea83dd 1502 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1503 return;
f0706e82
JB		 1504
1505 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1506
988c0f72 1507 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 1508 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 1509
48c2fc59
TW		 1510 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1511 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1512 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1513 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1514 mod_timer(&ifsta->timer, jiffies +
1515 IEEE80211_RETRY_AUTH_INTERVAL);
1516 }
1517
aa458d17 1518 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1519 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1520}
1521
1522
f698d856 1523static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1524 struct ieee80211_if_sta *ifsta,
1525 struct ieee80211_mgmt *mgmt,
1526 size_t len)
1527{
1528 u16 reason_code;
0795af57 1529 DECLARE_MAC_BUF(mac);
f0706e82 1530
f4ea83dd 1531 if (len < 24 + 2)
f0706e82 1532 return;
f0706e82 1533
f4ea83dd 1534 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1535 return;
f0706e82
JB		 1536
1537 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1538
d6f2da5b 1539 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 1540 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 1541
48c2fc59
TW		 1542 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1543 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1544 mod_timer(&ifsta->timer, jiffies +
1545 IEEE80211_RETRY_AUTH_INTERVAL);
1546 }
1547
aa458d17 1548 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 1549}
1550
1551
471b3efd 1552static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1553 struct ieee80211_if_sta *ifsta,
1554 struct ieee80211_mgmt *mgmt,
1555 size_t len,
1556 int reassoc)
1557{
471b3efd 1558 struct ieee80211_local *local = sdata->local;
8318d78a 1559 struct ieee80211_supported_band *sband;
f0706e82 1560 struct sta_info *sta;
8318d78a 1561 u64 rates, basic_rates;
f0706e82
JB		 1562 u16 capab_info, status_code, aid;
1563 struct ieee802_11_elems elems;
471b3efd 1564 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1565 u8 *pos;
1566 int i, j;
0795af57 1567 DECLARE_MAC_BUF(mac);
8318d78a 1568 bool have_higher_than_11mbit = false;
f0706e82
JB		 1569
1570 /* AssocResp and ReassocResp have identical structure, so process both
1571 * of them in this function. */
1572
48c2fc59 1573 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1574 return;
f0706e82 1575
f4ea83dd 1576 if (len < 24 + 6)
f0706e82 1577 return;
f0706e82 1578
f4ea83dd 1579 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1580 return;
f0706e82
JB		 1581
1582 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1583 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1584 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1585
0795af57 1586 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1587 "status=%d aid=%d)\n",
f698d856 1588 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1589 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1590
1591 if (status_code != WLAN_STATUS_SUCCESS) {
1592 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1593 sdata->dev->name, status_code);
8a69aa93
DD		 1594 /* if this was a reassociation, ensure we try a "full"
1595 * association next time. This works around some broken APs
1596 * which do not correctly reject reassociation requests. */
d6f2da5b 1597 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1598 return;
1599 }
1600
1dd84aa2
JB		 1601 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1602 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1603 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1604 aid &= ~(BIT(15) | BIT(14));
1605
f0706e82 1606 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1607 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1608
1609 if (!elems.supp_rates) {
1610 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1611 sdata->dev->name);
f0706e82
JB		 1612 return;
1613 }
1614
f698d856 1615 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1616 ifsta->aid = aid;
1617 ifsta->ap_capab = capab_info;
1618
1619 kfree(ifsta->assocresp_ies);
1620 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1621 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1622 if (ifsta->assocresp_ies)
1623 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1624
d0709a65
JB		 1625 rcu_read_lock();
1626
f0706e82
JB		 1627 /* Add STA entry for the AP */
1628 sta = sta_info_get(local, ifsta->bssid);
1629 if (!sta) {
1630 struct ieee80211_sta_bss *bss;
73651ee6 1631 int err;
d0709a65 1632
73651ee6
JB		 1633 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1634 if (!sta) {
1635 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1636 " the AP\n", sdata->dev->name);
d0709a65 1637 rcu_read_unlock();
f0706e82
JB		 1638 return;
1639 }
60f8b39c
JB		 1640 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1641 local->hw.conf.channel->center_freq,
1642 ifsta->ssid, ifsta->ssid_len);
1643 if (bss) {
1644 sta->last_signal = bss->signal;
1645 sta->last_qual = bss->qual;
1646 sta->last_noise = bss->noise;
1647 ieee80211_rx_bss_put(local, bss);
1648 }
f709fc69 1649
60f8b39c
JB		 1650 err = sta_info_insert(sta);
1651 if (err) {
1652 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1653 " the AP (error %d)\n", sdata->dev->name, err);
1654 rcu_read_unlock();
1655 return;
f709fc69 1656 }
60f8b39c
JB		 1657 /* update new sta with its last rx activity */
1658 sta->last_rx = jiffies;
f709fc69 1659 }
f709fc69 1660
60f8b39c
JB		 1661 /*
1662 * FIXME: Do we really need to update the sta_info's information here?
1663 * We already know about the AP (we found it in our list) so it
1664 * should already be filled with the right info, no?
1665 * As is stands, all this is racy because typically we assume
1666 * the information that is filled in here (except flags) doesn't
1667 * change while a STA structure is alive. As such, it should move
1668 * to between the sta_info_alloc() and sta_info_insert() above.
1669 */
f709fc69 1670
60f8b39c
JB		 1671 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1672 WLAN_STA_AUTHORIZED);
05e5e883 1673
60f8b39c
JB		 1674 rates = 0;
1675 basic_rates = 0;
1676 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1677
60f8b39c
JB		 1678 for (i = 0; i < elems.supp_rates_len; i++) {
1679 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 1680
60f8b39c
JB		 1681 if (rate > 110)
1682 have_higher_than_11mbit = true;
1683
1684 for (j = 0; j < sband->n_bitrates; j++) {
1685 if (sband->bitrates[j].bitrate == rate)
1686 rates |= BIT(j);
1687 if (elems.supp_rates[i] & 0x80)
1688 basic_rates |= BIT(j);
f709fc69 1689 }
f709fc69
LCC		 1690 }
1691
60f8b39c
JB		 1692 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1693 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 1694
60f8b39c
JB		 1695 if (rate > 110)
1696 have_higher_than_11mbit = true;
f0706e82 1697
60f8b39c
JB		 1698 for (j = 0; j < sband->n_bitrates; j++) {
1699 if (sband->bitrates[j].bitrate == rate)
1700 rates |= BIT(j);
1701 if (elems.ext_supp_rates[i] & 0x80)
1702 basic_rates |= BIT(j);
1703 }
1ebebea8 1704 }
f0706e82 1705
60f8b39c
JB		 1706 sta->supp_rates[local->hw.conf.channel->band] = rates;
1707 sdata->basic_rates = basic_rates;
1708
1709 /* cf. IEEE 802.11 9.2.12 */
1710 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1711 have_higher_than_11mbit)
1712 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1713 else
1714 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1715
60f8b39c
JB		 1716 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1717 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1718 struct ieee80211_ht_bss_info bss_info;
1719 ieee80211_ht_cap_ie_to_ht_info(
1720 (struct ieee80211_ht_cap *)
1721 elems.ht_cap_elem, &sta->ht_info);
1722 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1723 (struct ieee80211_ht_addt_info *)
1724 elems.ht_info_elem, &bss_info);
1725 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
1726 }
f0706e82 1727
60f8b39c 1728 rate_control_rate_init(sta, local);
f0706e82 1729
60f8b39c
JB		 1730 if (elems.wmm_param) {
1731 set_sta_flags(sta, WLAN_STA_WME);
1732 rcu_read_unlock();
1733 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1734 elems.wmm_param_len);
1735 } else
1736 rcu_read_unlock();
f0706e82 1737
60f8b39c
JB		 1738 /* set AID and assoc capability,
1739 * ieee80211_set_associated() will tell the driver */
1740 bss_conf->aid = aid;
1741 bss_conf->assoc_capability = capab_info;
1742 ieee80211_set_associated(sdata, ifsta);
f0706e82 1743
60f8b39c 1744 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1745}
1746
1747
f698d856 1748static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 1749 struct ieee80211_if_sta *ifsta,
1750 struct ieee80211_sta_bss *bss)
1751{
f698d856 1752 struct ieee80211_local *local = sdata->local;
a607268a
BR		 1753 int res, rates, i, j;
1754 struct sk_buff *skb;
1755 struct ieee80211_mgmt *mgmt;
a607268a 1756 u8 *pos;
a607268a 1757 struct ieee80211_supported_band *sband;
507b06d0 1758 union iwreq_data wrqu;
a607268a
BR		 1759
1760 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1761
1762 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 1763 sta_info_flush_delayed(sdata);
a607268a
BR		 1764
1765 if (local->ops->reset_tsf) {
1766 /* Reset own TSF to allow time synchronization work. */
1767 local->ops->reset_tsf(local_to_hw(local));
1768 }
1769 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 1770 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1771 if (res)
1772 return res;
1773
1774 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
1775
a607268a
BR		 1776 sdata->drop_unencrypted = bss->capability &
1777 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1778
f698d856 1779 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 1780
be038b37
AK		 1781 if (res)
1782 return res;
a607268a 1783
9d139c81 1784 /* Build IBSS probe response */
a607268a 1785 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 1786 if (skb) {
a607268a
BR		 1787 skb_reserve(skb, local->hw.extra_tx_headroom);
1788
1789 mgmt = (struct ieee80211_mgmt *)
1790 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1791 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 1792 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1793 IEEE80211_STYPE_PROBE_RESP);
a607268a 1794 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 1795 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 1796 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1797 mgmt->u.beacon.beacon_int =
1798 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 1799 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 1800 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
1801
1802 pos = skb_put(skb, 2 + ifsta->ssid_len);
1803 *pos++ = WLAN_EID_SSID;
1804 *pos++ = ifsta->ssid_len;
1805 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
1806
1807 rates = bss->supp_rates_len;
1808 if (rates > 8)
1809 rates = 8;
1810 pos = skb_put(skb, 2 + rates);
1811 *pos++ = WLAN_EID_SUPP_RATES;
1812 *pos++ = rates;
1813 memcpy(pos, bss->supp_rates, rates);
1814
1815 if (bss->band == IEEE80211_BAND_2GHZ) {
1816 pos = skb_put(skb, 2 + 1);
1817 *pos++ = WLAN_EID_DS_PARAMS;
1818 *pos++ = 1;
1819 *pos++ = ieee80211_frequency_to_channel(bss->freq);
1820 }
1821
1822 pos = skb_put(skb, 2 + 2);
1823 *pos++ = WLAN_EID_IBSS_PARAMS;
1824 *pos++ = 2;
1825 /* FIX: set ATIM window based on scan results */
1826 *pos++ = 0;
1827 *pos++ = 0;
1828
1829 if (bss->supp_rates_len > 8) {
1830 rates = bss->supp_rates_len - 8;
1831 pos = skb_put(skb, 2 + rates);
1832 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1833 *pos++ = rates;
1834 memcpy(pos, &bss->supp_rates[8], rates);
1835 }
1836
9d139c81 1837 ifsta->probe_resp = skb;
e039fa4a 1838
9d139c81
JB		 1839 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
1840 }
a607268a 1841
9d139c81
JB		 1842 rates = 0;
1843 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1844 for (i = 0; i < bss->supp_rates_len; i++) {
1845 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
1846 for (j = 0; j < sband->n_bitrates; j++)
1847 if (sband->bitrates[j].bitrate == bitrate)
1848 rates |= BIT(j);
a607268a 1849 }
9d139c81
JB		 1850 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1851
f698d856 1852 ieee80211_sta_def_wmm_params(sdata, bss, 1);
a607268a 1853
48c2fc59 1854 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1855 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1856
507b06d0
DW		 1857 memset(&wrqu, 0, sizeof(wrqu));
1858 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 1859 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1860
1861 return res;
1862}
1863
f709fc69
LCC		 1864u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
1865 struct ieee802_11_elems *elems,
1866 enum ieee80211_band band)
1867{
1868 struct ieee80211_supported_band *sband;
1869 struct ieee80211_rate *bitrates;
1870 size_t num_rates;
1871 u64 supp_rates;
1872 int i, j;
1873 sband = local->hw.wiphy->bands[band];
1874
1875 if (!sband) {
1876 WARN_ON(1);
1877 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1878 }
1879
1880 bitrates = sband->bitrates;
1881 num_rates = sband->n_bitrates;
1882 supp_rates = 0;
1883 for (i = 0; i < elems->supp_rates_len +
1884 elems->ext_supp_rates_len; i++) {
1885 u8 rate = 0;
1886 int own_rate;
1887 if (i < elems->supp_rates_len)
1888 rate = elems->supp_rates[i];
1889 else if (elems->ext_supp_rates)
1890 rate = elems->ext_supp_rates
1891 [i - elems->supp_rates_len];
1892 own_rate = 5 * (rate & 0x7f);
1893 for (j = 0; j < num_rates; j++)
1894 if (bitrates[j].bitrate == own_rate)
1895 supp_rates |= BIT(j);
1896 }
1897 return supp_rates;
1898}
1899
8e1535d5
EG		 1900static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
1901 enum ieee80211_band band)
1902{
1903 struct ieee80211_supported_band *sband;
1904 struct ieee80211_rate *bitrates;
1905 u64 mandatory_rates;
1906 enum ieee80211_rate_flags mandatory_flag;
1907 int i;
1908
1909 sband = local->hw.wiphy->bands[band];
1910 if (!sband) {
1911 WARN_ON(1);
1912 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1913 }
1914
1915 if (band == IEEE80211_BAND_2GHZ)
1916 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1917 else
1918 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1919
1920 bitrates = sband->bitrates;
1921 mandatory_rates = 0;
1922 for (i = 0; i < sband->n_bitrates; i++)
1923 if (bitrates[i].flags & mandatory_flag)
1924 mandatory_rates |= BIT(i);
1925 return mandatory_rates;
1926}
a607268a 1927
98c8fccf
JB		 1928static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1929 struct ieee80211_mgmt *mgmt,
1930 size_t len,
1931 struct ieee80211_rx_status *rx_status,
1932 struct ieee802_11_elems *elems,
1933 bool beacon)
1934{
1935 struct ieee80211_local *local = sdata->local;
1936 int freq;
1937 struct ieee80211_sta_bss *bss;
1938 struct sta_info *sta;
1939 struct ieee80211_channel *channel;
1940 u64 beacon_timestamp, rx_timestamp;
1941 u64 supp_rates = 0;
1942 enum ieee80211_band band = rx_status->band;
1943 DECLARE_MAC_BUF(mac);
1944 DECLARE_MAC_BUF(mac2);
1945
1946 if (elems->ds_params && elems->ds_params_len == 1)
1947 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1948 else
1949 freq = rx_status->freq;
1950
1951 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1952
1953 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1954 return;
1955
1956 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
1957 elems->mesh_config && mesh_matches_local(elems, sdata)) {
1958 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1959
1960 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
1961 mesh_peer_accepts_plinks(elems));
1962 }
1963
1964 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
1965 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1966 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1967
1968 rcu_read_lock();
1969
1970 sta = sta_info_get(local, mgmt->sa);
1971 if (sta) {
1972 u64 prev_rates;
1973
1974 prev_rates = sta->supp_rates[band];
1975 /* make sure mandatory rates are always added */
1976 sta->supp_rates[band] = supp_rates |
1977 ieee80211_sta_get_mandatory_rates(local, band);
1978
1979#ifdef CONFIG_MAC80211_IBSS_DEBUG
1980 if (sta->supp_rates[band] != prev_rates)
1981 printk(KERN_DEBUG "%s: updated supp_rates set "
1982 "for %s based on beacon info (0x%llx | "
1983 "0x%llx -> 0x%llx)\n",
1984 sdata->dev->name, print_mac(mac, sta->addr),
1985 (unsigned long long) prev_rates,
1986 (unsigned long long) supp_rates,
1987 (unsigned long long) sta->supp_rates[band]);
1988#endif
1989 } else {
1990 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
1991 mgmt->sa, supp_rates);
1992 }
1993
1994 rcu_read_unlock();
1995 }
1996
1997 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
1998 freq, beacon);
1999 if (!bss)
2000 return;
2001
2002 /* was just updated in ieee80211_bss_info_update */
2003 beacon_timestamp = bss->timestamp;
2004
30b89b0f
JB		 2005 /*
2006 * In STA mode, the remaining parameters should not be overridden
2007 * by beacons because they're not necessarily accurate there.
2008 */
2009 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 2010 bss->last_probe_resp && beacon) {
3e122be0 2011 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 2012 return;
2013 }
2014
9d9bf77d
BR		 2015 /* check if we need to merge IBSS */
2016 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
fba4a1e6 2017 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 2018 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 2019 elems->ssid_len == sdata->u.sta.ssid_len &&
2020 memcmp(elems->ssid, sdata->u.sta.ssid,
2021 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 2022 if (rx_status->flag & RX_FLAG_TSFT) {
2023 /* in order for correct IBSS merging we need mactime
2024 *
2025 * since mactime is defined as the time the first data
2026 * symbol of the frame hits the PHY, and the timestamp
2027 * of the beacon is defined as "the time that the data
2028 * symbol containing the first bit of the timestamp is
2029 * transmitted to the PHY plus the transmitting STA’s
2030 * delays through its local PHY from the MAC-PHY
2031 * interface to its interface with the WM"
2032 * (802.11 11.1.2) - equals the time this bit arrives at
2033 * the receiver - we have to take into account the
2034 * offset between the two.
2035 * e.g: at 1 MBit that means mactime is 192 usec earlier
2036 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2037 */
8e1535d5 2038 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 2039 bitrates[rx_status->rate_idx].bitrate;
2040 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2041 } else if (local && local->ops && local->ops->get_tsf)
2042 /* second best option: get current TSF */
2043 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2044 else
2045 /* can't merge without knowing the TSF */
2046 rx_timestamp = -1LLU;
2047#ifdef CONFIG_MAC80211_IBSS_DEBUG
2048 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2049 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2050 print_mac(mac, mgmt->sa),
2051 print_mac(mac2, mgmt->bssid),
2052 (unsigned long long)rx_timestamp,
2053 (unsigned long long)beacon_timestamp,
2054 (unsigned long long)(rx_timestamp - beacon_timestamp),
2055 jiffies);
2056#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2057 if (beacon_timestamp > rx_timestamp) {
576fdeae 2058#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 2059 printk(KERN_DEBUG "%s: beacon TSF higher than "
2060 "local TSF - IBSS merge with BSSID %s\n",
f698d856 2061 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 2062#endif
f698d856
JBG		 2063 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2064 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 2065 mgmt->bssid, mgmt->sa,
8e1535d5 2066 supp_rates);
9d9bf77d
BR		 2067 }
2068 }
2069
3e122be0 2070 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2071}
2072
2073
f698d856 2074static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2075 struct ieee80211_mgmt *mgmt,
2076 size_t len,
2077 struct ieee80211_rx_status *rx_status)
2078{
ae6a44e3
EK		 2079 size_t baselen;
2080 struct ieee802_11_elems elems;
9859b81e 2081 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 2082
8e7cdbb6
TW		 2083 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2084 return; /* ignore ProbeResp to foreign address */
2085
ae6a44e3
EK		 2086 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2087 if (baselen > len)
2088 return;
2089
2090 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2091 &elems);
2092
98c8fccf 2093 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 2094
2095 /* direct probe may be part of the association flow */
2096 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2097 &ifsta->request)) {
2098 printk(KERN_DEBUG "%s direct probe responded\n",
2099 sdata->dev->name);
2100 ieee80211_authenticate(sdata, ifsta);
2101 }
f0706e82
JB		 2102}
2103
2104
f698d856 2105static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2106 struct ieee80211_mgmt *mgmt,
2107 size_t len,
2108 struct ieee80211_rx_status *rx_status)
2109{
f0706e82 2110 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2111 size_t baselen;
2112 struct ieee802_11_elems elems;
f698d856 2113 struct ieee80211_local *local = sdata->local;
d3c990fb 2114 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2115 u32 changed = 0;
f0706e82 2116
ae6a44e3
EK		 2117 /* Process beacon from the current BSS */
2118 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2119 if (baselen > len)
2120 return;
2121
2122 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2123
98c8fccf 2124 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 2125
51fb61e7 2126 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2127 return;
2128 ifsta = &sdata->u.sta;
2129
d6f2da5b 2130 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2131 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2132 return;
2133
fe3fa827
JB		 2134 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2135 elems.wmm_param_len);
2136
5628221c 2137 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2138 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2139 else {
2140 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2141 changed |= ieee80211_handle_protect_preamb(sdata, false,
2142 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2143 }
f0706e82 2144
d3c990fb 2145 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2146 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2147 struct ieee80211_ht_bss_info bss_info;
2148
2149 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2150 (struct ieee80211_ht_addt_info *)
2151 elems.ht_info_elem, &bss_info);
38668c05
TW		 2152 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2153 &bss_info);
d3c990fb
RR		 2154 }
2155
471b3efd 2156 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2157}
2158
2159
f698d856 2160static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2161 struct ieee80211_if_sta *ifsta,
2162 struct ieee80211_mgmt *mgmt,
2163 size_t len,
2164 struct ieee80211_rx_status *rx_status)
2165{
f698d856 2166 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2167 int tx_last_beacon;
2168 struct sk_buff *skb;
2169 struct ieee80211_mgmt *resp;
2170 u8 *pos, *end;
0795af57
JP		 2171 DECLARE_MAC_BUF(mac);
2172#ifdef CONFIG_MAC80211_IBSS_DEBUG
2173 DECLARE_MAC_BUF(mac2);
2174 DECLARE_MAC_BUF(mac3);
2175#endif
f0706e82 2176
51fb61e7 2177 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 2178 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2179 len < 24 + 2 || !ifsta->probe_resp)
2180 return;
2181
2182 if (local->ops->tx_last_beacon)
2183 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2184 else
2185 tx_last_beacon = 1;
2186
2187#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2188 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2189 "%s (tx_last_beacon=%d)\n",
f698d856 2190 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 2191 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2192#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2193
2194 if (!tx_last_beacon)
2195 return;
2196
2197 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2198 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2199 return;
2200
2201 end = ((u8 *) mgmt) + len;
2202 pos = mgmt->u.probe_req.variable;
2203 if (pos[0] != WLAN_EID_SSID ||
2204 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2205#ifdef CONFIG_MAC80211_IBSS_DEBUG
2206 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2207 "from %s\n",
f698d856 2208 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 2209#endif
f0706e82
JB		 2210 return;
2211 }
2212 if (pos[1] != 0 &&
2213 (pos[1] != ifsta->ssid_len ||
2214 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2215 /* Ignore ProbeReq for foreign SSID */
2216 return;
2217 }
2218
2219 /* Reply with ProbeResp */
0ec0b7ac 2220 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2221 if (!skb)
2222 return;
2223
2224 resp = (struct ieee80211_mgmt *) skb->data;
2225 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2226#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2227 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 2228 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 2229#endif /* CONFIG_MAC80211_IBSS_DEBUG */
f698d856 2230 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 2231}
2232
f698d856 2233static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
4e20cb29
JB		 2234 struct ieee80211_if_sta *ifsta,
2235 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2236 size_t len,
2237 struct ieee80211_rx_status *rx_status)
9f985b0e 2238{
f698d856 2239 struct ieee80211_local *local = sdata->local;
f709fc69 2240
9c80d3dc
JB		 2241 /* all categories we currently handle have action_code */
2242 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
9f985b0e
RR		 2243 return;
2244
2245 switch (mgmt->u.action.category) {
b6623486
AK		 2246 case WLAN_CATEGORY_SPECTRUM_MGMT:
2247 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2248 break;
5fd12d4d 2249 switch (mgmt->u.action.u.measurement.action_code) {
b6623486
AK		 2250 case WLAN_ACTION_SPCT_MSR_REQ:
2251 if (len < (IEEE80211_MIN_ACTION_SIZE +
2252 sizeof(mgmt->u.action.u.measurement)))
2253 break;
f698d856 2254 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
b6623486
AK		 2255 break;
2256 }
2257 break;
9f985b0e
RR		 2258 case WLAN_CATEGORY_BACK:
2259 switch (mgmt->u.action.u.addba_req.action_code) {
2260 case WLAN_ACTION_ADDBA_REQ:
2261 if (len < (IEEE80211_MIN_ACTION_SIZE +
2262 sizeof(mgmt->u.action.u.addba_req)))
2263 break;
f698d856 2264 ieee80211_sta_process_addba_request(local, mgmt, len);
9f985b0e 2265 break;
eadc8d9e
RR		 2266 case WLAN_ACTION_ADDBA_RESP:
2267 if (len < (IEEE80211_MIN_ACTION_SIZE +
2268 sizeof(mgmt->u.action.u.addba_resp)))
2269 break;
f698d856 2270 ieee80211_sta_process_addba_resp(local, mgmt, len);
eadc8d9e 2271 break;
688b88a4
RR		 2272 case WLAN_ACTION_DELBA:
2273 if (len < (IEEE80211_MIN_ACTION_SIZE +
2274 sizeof(mgmt->u.action.u.delba)))
2275 break;
f698d856 2276 ieee80211_sta_process_delba(sdata, mgmt, len);
688b88a4 2277 break;
9f985b0e
RR		 2278 }
2279 break;
f709fc69 2280 case PLINK_CATEGORY:
902acc78 2281 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2282 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
f709fc69 2283 break;
f709fc69 2284 case MESH_PATH_SEL_CATEGORY:
902acc78 2285 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2286 mesh_rx_path_sel_frame(sdata, mgmt, len);
f709fc69 2287 break;
9f985b0e
RR		 2288 }
2289}
f0706e82 2290
f698d856 2291void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2292 struct ieee80211_rx_status *rx_status)
2293{
f698d856 2294 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2295 struct ieee80211_if_sta *ifsta;
2296 struct ieee80211_mgmt *mgmt;
2297 u16 fc;
2298
2299 if (skb->len < 24)
2300 goto fail;
2301
f0706e82
JB		 2302 ifsta = &sdata->u.sta;
2303
2304 mgmt = (struct ieee80211_mgmt *) skb->data;
2305 fc = le16_to_cpu(mgmt->frame_control);
2306
2307 switch (fc & IEEE80211_FCTL_STYPE) {
2308 case IEEE80211_STYPE_PROBE_REQ:
2309 case IEEE80211_STYPE_PROBE_RESP:
2310 case IEEE80211_STYPE_BEACON:
f709fc69 2311 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2312 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2313 case IEEE80211_STYPE_AUTH:
2314 case IEEE80211_STYPE_ASSOC_RESP:
2315 case IEEE80211_STYPE_REASSOC_RESP:
2316 case IEEE80211_STYPE_DEAUTH:
2317 case IEEE80211_STYPE_DISASSOC:
2318 skb_queue_tail(&ifsta->skb_queue, skb);
2319 queue_work(local->hw.workqueue, &ifsta->work);
2320 return;
f0706e82
JB		 2321 }
2322
2323 fail:
2324 kfree_skb(skb);
2325}
2326
f698d856 2327static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2328 struct sk_buff *skb)
2329{
2330 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2331 struct ieee80211_if_sta *ifsta;
2332 struct ieee80211_mgmt *mgmt;
2333 u16 fc;
2334
f0706e82
JB		 2335 ifsta = &sdata->u.sta;
2336
2337 rx_status = (struct ieee80211_rx_status *) skb->cb;
2338 mgmt = (struct ieee80211_mgmt *) skb->data;
2339 fc = le16_to_cpu(mgmt->frame_control);
2340
2341 switch (fc & IEEE80211_FCTL_STYPE) {
2342 case IEEE80211_STYPE_PROBE_REQ:
f698d856 2343 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 2344 rx_status);
2345 break;
2346 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2347 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2348 break;
2349 case IEEE80211_STYPE_BEACON:
f698d856 2350 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2351 break;
2352 case IEEE80211_STYPE_AUTH:
f698d856 2353 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2354 break;
2355 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2356 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2357 break;
2358 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2359 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2360 break;
2361 case IEEE80211_STYPE_DEAUTH:
f698d856 2362 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2363 break;
2364 case IEEE80211_STYPE_DISASSOC:
f698d856 2365 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82 2366 break;
9f985b0e 2367 case IEEE80211_STYPE_ACTION:
f698d856 2368 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
9f985b0e 2369 break;
f0706e82
JB		 2370 }
2371
2372 kfree_skb(skb);
2373}
2374
2375
f698d856 2376static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2377{
f698d856 2378 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2379 int active = 0;
2380 struct sta_info *sta;
2381
d0709a65
JB		 2382 rcu_read_lock();
2383
2384 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2385 if (sta->sdata == sdata &&
f0706e82
JB		 2386 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2387 jiffies)) {
2388 active++;
2389 break;
2390 }
2391 }
d0709a65
JB		 2392
2393 rcu_read_unlock();
f0706e82
JB		 2394
2395 return active;
2396}
2397
2398
f698d856 2399static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
f0706e82 2400{
f698d856 2401 struct ieee80211_local *local = sdata->local;
f0706e82 2402 struct sta_info *sta, *tmp;
be8755e1 2403 LIST_HEAD(tmp_list);
0795af57 2404 DECLARE_MAC_BUF(mac);
d0709a65 2405 unsigned long flags;
f0706e82 2406
d0709a65 2407 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 2408 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 2409 if (time_after(jiffies, sta->last_rx + exp_time)) {
f4ea83dd 2410#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2411 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
f698d856 2412 sdata->dev->name, print_mac(mac, sta->addr));
f4ea83dd 2413#endif
cb585bcc 2414 __sta_info_unlink(&sta);
d0709a65
JB		 2415 if (sta)
2416 list_add(&sta->list, &tmp_list);
f0706e82 2417 }
d0709a65 2418 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 2419
d0709a65
JB		 2420 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
2421 sta_info_destroy(sta);
f0706e82
JB		 2422}
2423
2424
f698d856 2425static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2426 struct ieee80211_if_sta *ifsta)
2427{
2428 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2429
f698d856
JBG		 2430 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2431 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2432 return;
2433
2434 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 2435 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2436 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 2437}
2438
2439
f709fc69 2440#ifdef CONFIG_MAC80211_MESH
f698d856 2441static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
f709fc69
LCC		 2442 struct ieee80211_if_sta *ifsta)
2443{
f709fc69
LCC		 2444 bool free_plinks;
2445
f698d856
JBG		 2446 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
2447 mesh_path_expire(sdata);
f709fc69
LCC		 2448
2449 free_plinks = mesh_plink_availables(sdata);
2450 if (free_plinks != sdata->u.sta.accepting_plinks)
9d139c81 2451 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 2452
2453 mod_timer(&ifsta->timer, jiffies +
2454 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
2455}
2456
2457
f698d856 2458void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
f709fc69
LCC		 2459{
2460 struct ieee80211_if_sta *ifsta;
f709fc69 2461 ifsta = &sdata->u.sta;
48c2fc59 2462 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
f709fc69 2463 ieee80211_sta_timer((unsigned long)sdata);
56a6d13d 2464 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 2465}
2466#endif
2467
2468
f0706e82
JB		 2469void ieee80211_sta_timer(unsigned long data)
2470{
60f8b39c
JB		 2471 struct ieee80211_sub_if_data *sdata =
2472 (struct ieee80211_sub_if_data *) data;
2473 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2474 struct ieee80211_local *local = sdata->local;
f0706e82 2475
60f8b39c
JB		 2476 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2477 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2478}
2479
f698d856 2480static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2481 struct ieee80211_if_sta *ifsta)
2482{
f698d856 2483 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2484
2485 if (local->ops->reset_tsf) {
2486 /* Reset own TSF to allow time synchronization work. */
2487 local->ops->reset_tsf(local_to_hw(local));
2488 }
2489
2490 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2491
2492
2493 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2494 ifsta->auth_alg = WLAN_AUTH_OPEN;
2495 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2496 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2497 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2498 ifsta->auth_alg = WLAN_AUTH_LEAP;
2499 else
2500 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2501 ifsta->auth_transaction = -1;
d6f2da5b 2502 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2503 ifsta->assoc_scan_tries = 0;
9859b81e 2504 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2505 ifsta->auth_tries = 0;
2506 ifsta->assoc_tries = 0;
24e64622 2507 netif_tx_stop_all_queues(sdata->dev);
f698d856 2508 netif_carrier_off(sdata->dev);
f0706e82
JB		 2509}
2510
2511
f698d856 2512void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2513 struct ieee80211_if_sta *ifsta)
2514{
f698d856 2515 struct ieee80211_local *local = sdata->local;
f0706e82 2516
51fb61e7 2517 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2518 return;
2519
d6f2da5b 2520 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3b7ee69d 2521 IEEE80211_STA_AUTO_BSSID_SEL)) &&
d6f2da5b 2522 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3b7ee69d
TW		 2523 IEEE80211_STA_AUTO_SSID_SEL))) {
2524
2525 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2526 ieee80211_set_disassoc(sdata, ifsta, true, true,
2527 WLAN_REASON_DEAUTH_LEAVING);
2528
f0706e82
JB		 2529 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2530 queue_work(local->hw.workqueue, &ifsta->work);
2531 }
2532}
2533
2534static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2535 const char *ssid, int ssid_len)
2536{
2537 int tmp, hidden_ssid;
2538
48225709
MW		 2539 if (ssid_len == ifsta->ssid_len &&
2540 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2541 return 1;
2542
d6f2da5b 2543 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2544 return 0;
2545
2546 hidden_ssid = 1;
2547 tmp = ssid_len;
2548 while (tmp--) {
2549 if (ssid[tmp] != '\0') {
2550 hidden_ssid = 0;
2551 break;
2552 }
2553 }
2554
2555 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2556 return 1;
2557
2558 if (ssid_len == 1 && ssid[0] == ' ')
2559 return 1;
2560
2561 return 0;
2562}
2563
f698d856 2564static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2565 struct ieee80211_if_sta *ifsta)
2566{
f698d856 2567 struct ieee80211_local *local = sdata->local;
f0706e82 2568 struct ieee80211_sta_bss *bss;
8318d78a 2569 struct ieee80211_supported_band *sband;
f0706e82
JB		 2570 u8 bssid[ETH_ALEN], *pos;
2571 int i;
167ad6f7 2572 int ret;
0795af57 2573 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2574
2575#if 0
2576 /* Easier testing, use fixed BSSID. */
2577 memset(bssid, 0xfe, ETH_ALEN);
2578#else
2579 /* Generate random, not broadcast, locally administered BSSID. Mix in
2580 * own MAC address to make sure that devices that do not have proper
2581 * random number generator get different BSSID. */
2582 get_random_bytes(bssid, ETH_ALEN);
2583 for (i = 0; i < ETH_ALEN; i++)
f698d856 2584 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 2585 bssid[0] &= ~0x01;
2586 bssid[0] |= 0x02;
2587#endif
2588
0795af57 2589 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 2590 sdata->dev->name, print_mac(mac, bssid));
f0706e82 2591
98c8fccf 2592 bss = ieee80211_rx_bss_add(local, bssid,
8318d78a 2593 local->hw.conf.channel->center_freq,
cffdd30d 2594 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2595 if (!bss)
2596 return -ENOMEM;
2597
8318d78a
JB		 2598 bss->band = local->hw.conf.channel->band;
2599 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 2600
2601 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2602 local->hw.conf.beacon_int = 100;
f0706e82 2603 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 2604 bss->last_update = jiffies;
2605 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2606
2607 if (sdata->default_key)
f0706e82 2608 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2609 else
f0706e82 2610 sdata->drop_unencrypted = 0;
988c0f72 2611
8318d78a 2612 bss->supp_rates_len = sband->n_bitrates;
f0706e82 2613 pos = bss->supp_rates;
8318d78a
JB		 2614 for (i = 0; i < sband->n_bitrates; i++) {
2615 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2616 *pos++ = (u8) (rate / 5);
2617 }
2618
f698d856 2619 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2620 ieee80211_rx_bss_put(local, bss);
167ad6f7 2621 return ret;
f0706e82
JB		 2622}
2623
2624
f698d856 2625static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2626 struct ieee80211_if_sta *ifsta)
2627{
f698d856 2628 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2629 struct ieee80211_sta_bss *bss;
2630 int found = 0;
2631 u8 bssid[ETH_ALEN];
2632 int active_ibss;
0795af57
JP		 2633 DECLARE_MAC_BUF(mac);
2634 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2635
2636 if (ifsta->ssid_len == 0)
2637 return -EINVAL;
2638
f698d856 2639 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2640#ifdef CONFIG_MAC80211_IBSS_DEBUG
2641 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2642 sdata->dev->name, active_ibss);
f0706e82
JB		 2643#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2644 spin_lock_bh(&local->sta_bss_lock);
2645 list_for_each_entry(bss, &local->sta_bss_list, list) {
2646 if (ifsta->ssid_len != bss->ssid_len ||
2647 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2648 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2649 continue;
2650#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2651 printk(KERN_DEBUG " bssid=%s found\n",
2652 print_mac(mac, bss->bssid));
f0706e82
JB		 2653#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2654 memcpy(bssid, bss->bssid, ETH_ALEN);
2655 found = 1;
2656 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2657 break;
2658 }
2659 spin_unlock_bh(&local->sta_bss_lock);
2660
2661#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 2662 if (found)
2663 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2664 "%s\n", print_mac(mac, bssid),
2665 print_mac(mac2, ifsta->bssid));
f0706e82 2666#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 2667
2668 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 2669 int ret;
80693ceb
DD		 2670 int search_freq;
2671
2672 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2673 search_freq = bss->freq;
2674 else
2675 search_freq = local->hw.conf.channel->center_freq;
2676
f698d856 2677 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2678 ifsta->ssid, ifsta->ssid_len);
2679 if (!bss)
2680 goto dont_join;
2681
0795af57 2682 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2683 " based on configured SSID\n",
f698d856
JBG		 2684 sdata->dev->name, print_mac(mac, bssid));
2685 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2686 ieee80211_rx_bss_put(local, bss);
167ad6f7 2687 return ret;
f0706e82 2688 }
80693ceb
DD		 2689
2690dont_join:
f0706e82
JB		 2691#ifdef CONFIG_MAC80211_IBSS_DEBUG
2692 printk(KERN_DEBUG " did not try to join ibss\n");
2693#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2694
2695 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2696 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2697 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2698 mod_timer(&ifsta->timer, jiffies +
2699 IEEE80211_IBSS_MERGE_INTERVAL);
2700 } else if (time_after(jiffies, local->last_scan_completed +
2701 IEEE80211_SCAN_INTERVAL)) {
2702 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 2703 "join\n", sdata->dev->name);
2704 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 2705 ifsta->ssid_len);
48c2fc59 2706 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2707 int interval = IEEE80211_SCAN_INTERVAL;
2708
2709 if (time_after(jiffies, ifsta->ibss_join_req +
2710 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2711 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2712 (!(local->oper_channel->flags &
2713 IEEE80211_CHAN_NO_IBSS)))
f698d856 2714 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2715 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2716 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2717 " %d MHz\n", sdata->dev->name,
8318d78a 2718 local->hw.conf.channel->center_freq);
f0706e82
JB		 2719 }
2720
2721 /* No IBSS found - decrease scan interval and continue
2722 * scanning. */
2723 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2724 }
2725
48c2fc59 2726 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2727 mod_timer(&ifsta->timer, jiffies + interval);
2728 return 0;
2729 }
2730
2731 return 0;
2732}
2733
2734
f698d856 2735int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
f0706e82 2736{
f0706e82 2737 struct ieee80211_if_sta *ifsta;
9d139c81 2738 int res;
f0706e82
JB		 2739
2740 if (len > IEEE80211_MAX_SSID_LEN)
2741 return -EINVAL;
2742
f0706e82
JB		 2743 ifsta = &sdata->u.sta;
2744
9d139c81
JB		 2745 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2746 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2747 memcpy(ifsta->ssid, ssid, len);
2748 ifsta->ssid_len = len;
d6f2da5b 2749 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 2750
2751 res = 0;
2752 /*
2753 * Hack! MLME code needs to be cleaned up to have different
2754 * entry points for configuration and internal selection change
2755 */
2756 if (netif_running(sdata->dev))
2757 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
2758 if (res) {
2759 printk(KERN_DEBUG "%s: Failed to config new SSID to "
f698d856 2760 "the low-level driver\n", sdata->dev->name);
9d139c81
JB		 2761 return res;
2762 }
2763 }
f0706e82 2764
d6f2da5b
JS		 2765 if (len)
2766 ifsta->flags |= IEEE80211_STA_SSID_SET;
2767 else
2768 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 2769
51fb61e7 2770 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 2771 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82 2772 ifsta->ibss_join_req = jiffies;
48c2fc59 2773 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f698d856 2774 return ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 2775 }
9d139c81 2776
f0706e82
JB		 2777 return 0;
2778}
2779
2780
f698d856 2781int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
f0706e82 2782{
f0706e82
JB		 2783 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2784 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2785 *len = ifsta->ssid_len;
2786 return 0;
2787}
2788
2789
f698d856 2790int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
f0706e82 2791{
f0706e82
JB		 2792 struct ieee80211_if_sta *ifsta;
2793 int res;
2794
f0706e82
JB		 2795 ifsta = &sdata->u.sta;
2796
2797 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2798 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 2799 res = 0;
2800 /*
2801 * Hack! See also ieee80211_sta_set_ssid.
2802 */
2803 if (netif_running(sdata->dev))
2804 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 2805 if (res) {
2806 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
f698d856 2807 "the low-level driver\n", sdata->dev->name);
f0706e82
JB		 2808 return res;
2809 }
2810 }
2811
d6f2da5b
JS		 2812 if (is_valid_ether_addr(bssid))
2813 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2814 else
d6f2da5b
JS		 2815 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2816
f0706e82
JB		 2817 return 0;
2818}
2819
2820
f698d856 2821int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
f0706e82 2822{
f0706e82 2823 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 2824
f0706e82
JB		 2825 kfree(ifsta->extra_ie);
2826 if (len == 0) {
2827 ifsta->extra_ie = NULL;
2828 ifsta->extra_ie_len = 0;
2829 return 0;
2830 }
2831 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2832 if (!ifsta->extra_ie) {
2833 ifsta->extra_ie_len = 0;
2834 return -ENOMEM;
2835 }
2836 memcpy(ifsta->extra_ie, ie, len);
2837 ifsta->extra_ie_len = len;
2838 return 0;
2839}
2840
2841
f698d856 2842struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 2843 struct sk_buff *skb, u8 *bssid,
87291c02 2844 u8 *addr, u64 supp_rates)
f0706e82 2845{
f698d856 2846 struct ieee80211_local *local = sdata->local;
f0706e82 2847 struct sta_info *sta;
0795af57 2848 DECLARE_MAC_BUF(mac);
87291c02 2849 int band = local->hw.conf.channel->band;
f0706e82
JB		 2850
2851 /* TODO: Could consider removing the least recently used entry and
2852 * allow new one to be added. */
2853 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2854 if (net_ratelimit()) {
2855 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 2856 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 2857 }
2858 return NULL;
2859 }
2860
1e188637 2861 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2862 return NULL;
2863
f4ea83dd 2864#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 2865 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 2866 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 2867#endif
f0706e82 2868
73651ee6
JB		 2869 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2870 if (!sta)
f0706e82
JB		 2871 return NULL;
2872
07346f81 2873 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2874
8e1535d5
EG		 2875 /* make sure mandatory rates are always added */
2876 sta->supp_rates[band] = supp_rates |
2877 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 2878
2879 rate_control_rate_init(sta, local);
2880
93e5deb1 2881 if (sta_info_insert(sta))
73651ee6 2882 return NULL;
73651ee6 2883
d0709a65 2884 return sta;
f0706e82
JB		 2885}
2886
2887
60f8b39c
JB		 2888static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2889 struct ieee80211_if_sta *ifsta)
2890{
2891 struct ieee80211_local *local = sdata->local;
2892 struct ieee80211_sta_bss *bss, *selected = NULL;
2893 int top_rssi = 0, freq;
2894
2895 spin_lock_bh(&local->sta_bss_lock);
2896 freq = local->oper_channel->center_freq;
2897 list_for_each_entry(bss, &local->sta_bss_list, list) {
2898 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2899 continue;
2900
2901 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2902 IEEE80211_STA_AUTO_BSSID_SEL |
2903 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2904 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2905 !!sdata->default_key))
2906 continue;
2907
2908 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2909 bss->freq != freq)
2910 continue;
2911
2912 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2913 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2914 continue;
2915
2916 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2917 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2918 continue;
2919
2920 if (!selected || top_rssi < bss->signal) {
2921 selected = bss;
2922 top_rssi = bss->signal;
2923 }
2924 }
2925 if (selected)
2926 atomic_inc(&selected->users);
2927 spin_unlock_bh(&local->sta_bss_lock);
2928
2929 if (selected) {
2930 ieee80211_set_freq(sdata, selected->freq);
2931 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2932 ieee80211_sta_set_ssid(sdata, selected->ssid,
2933 selected->ssid_len);
2934 ieee80211_sta_set_bssid(sdata, selected->bssid);
2935 ieee80211_sta_def_wmm_params(sdata, selected, 0);
2936
2937 /* Send out direct probe if no probe resp was received or
2938 * the one we have is outdated
2939 */
2940 if (!selected->last_probe_resp ||
2941 time_after(jiffies, selected->last_probe_resp
2942 + IEEE80211_SCAN_RESULT_EXPIRE))
2943 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2944 else
2945 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2946
2947 ieee80211_rx_bss_put(local, selected);
2948 ieee80211_sta_reset_auth(sdata, ifsta);
2949 return 0;
2950 } else {
2951 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2952 ifsta->assoc_scan_tries++;
2953 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2954 ieee80211_sta_start_scan(sdata, NULL, 0);
2955 else
2956 ieee80211_sta_start_scan(sdata, ifsta->ssid,
2957 ifsta->ssid_len);
2958 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2959 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2960 } else
2961 ifsta->state = IEEE80211_STA_MLME_DISABLED;
2962 }
2963 return -1;
2964}
2965
2966
f698d856 2967int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2968{
f0706e82
JB		 2969 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2970
f4ea83dd 2971 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2972 sdata->dev->name, reason);
f0706e82 2973
51fb61e7
JB		 2974 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2975 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 2976 return -EINVAL;
2977
aa458d17 2978 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2979 return 0;
2980}
2981
2982
f698d856 2983int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2984{
f0706e82
JB		 2985 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2986
f4ea83dd 2987 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2988 sdata->dev->name, reason);
f0706e82 2989
51fb61e7 2990 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2991 return -EINVAL;
2992
d6f2da5b 2993 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2994 return -1;
2995
aa458d17 2996 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2997 return 0;
2998}
84363e6e
MA		 2999
3000void ieee80211_notify_mac(struct ieee80211_hw *hw,
3001 enum ieee80211_notification_types notif_type)
3002{
3003 struct ieee80211_local *local = hw_to_local(hw);
3004 struct ieee80211_sub_if_data *sdata;
3005
3006 switch (notif_type) {
3007 case IEEE80211_NOTIFY_RE_ASSOC:
3008 rcu_read_lock();
3009 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 3010 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3011 continue;
84363e6e 3012
f698d856 3013 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 3014 }
3015 rcu_read_unlock();
3016 break;
3017 }
3018}
3019EXPORT_SYMBOL(ieee80211_notify_mac);
60f8b39c
JB		 3020
3021void ieee80211_sta_work(struct work_struct *work)
3022{
3023 struct ieee80211_sub_if_data *sdata =
3024 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3025 struct ieee80211_local *local = sdata->local;
3026 struct ieee80211_if_sta *ifsta;
3027 struct sk_buff *skb;
3028
3029 if (!netif_running(sdata->dev))
3030 return;
3031
3032 if (local->sta_sw_scanning || local->sta_hw_scanning)
3033 return;
3034
3035 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3036 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3037 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3038 return;
3039 ifsta = &sdata->u.sta;
3040
3041 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3042 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3043
3044#ifdef CONFIG_MAC80211_MESH
3045 if (ifsta->preq_queue_len &&
3046 time_after(jiffies,
3047 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3048 mesh_path_start_discovery(sdata);
3049#endif
3050
3051 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3052 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3053 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3054 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0fe8b33 3055 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
60f8b39c
JB		 3056 return;
3057 }
3058
3059 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3060 if (ieee80211_sta_config_auth(sdata, ifsta))
3061 return;
3062 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3063 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3064 return;
3065
3066 switch (ifsta->state) {
3067 case IEEE80211_STA_MLME_DISABLED:
3068 break;
3069 case IEEE80211_STA_MLME_DIRECT_PROBE:
3070 ieee80211_direct_probe(sdata, ifsta);
3071 break;
3072 case IEEE80211_STA_MLME_AUTHENTICATE:
3073 ieee80211_authenticate(sdata, ifsta);
3074 break;
3075 case IEEE80211_STA_MLME_ASSOCIATE:
3076 ieee80211_associate(sdata, ifsta);
3077 break;
3078 case IEEE80211_STA_MLME_ASSOCIATED:
3079 ieee80211_associated(sdata, ifsta);
3080 break;
3081 case IEEE80211_STA_MLME_IBSS_SEARCH:
3082 ieee80211_sta_find_ibss(sdata, ifsta);
3083 break;
3084 case IEEE80211_STA_MLME_IBSS_JOINED:
3085 ieee80211_sta_merge_ibss(sdata, ifsta);
3086 break;
3087#ifdef CONFIG_MAC80211_MESH
3088 case IEEE80211_STA_MLME_MESH_UP:
3089 ieee80211_mesh_housekeeping(sdata, ifsta);
3090 break;
3091#endif
3092 default:
3093 WARN_ON(1);
3094 break;
3095 }
3096
3097 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3098 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3099 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3100
3101 ieee80211_set_disassoc(sdata, ifsta, false, true,
3102 WLAN_REASON_UNSPECIFIED);
3103 }
3104}
0a51b27e
JB		 3105
3106void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3107{
3108 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3109 struct ieee80211_if_sta *ifsta;
3110
3111 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3112 ifsta = &sdata->u.sta;
3113 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3114 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3115 !ieee80211_sta_active_ibss(sdata)))
3116 ieee80211_sta_find_ibss(sdata, ifsta);
3117 }
3118}
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