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ath5k: Fix radio identification on AR5424/2424
[net-next-2.6.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
d0709a65 27#include <linux/rtnetlink.h>
f0706e82
JB		 28#include <net/iw_handler.h>
29#include <asm/types.h>
f0706e82
JB		 30
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
2c8dccc7
JB		 33#include "rate.h"
34#include "led.h"
f709fc69 35#include "mesh.h"
f0706e82
JB		 36
37#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40#define IEEE80211_ASSOC_MAX_TRIES 3
41#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
f709fc69 42#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
f0706e82
JB		 43#define IEEE80211_PROBE_INTERVAL (60 * HZ)
44#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45#define IEEE80211_SCAN_INTERVAL (2 * HZ)
46#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49#define IEEE80211_PROBE_DELAY (HZ / 33)
50#define IEEE80211_CHANNEL_TIME (HZ / 33)
51#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 55#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 56
57#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
f0706e82
JB		 60#define ERP_INFO_USE_PROTECTION BIT(1)
61
9f985b0e
RR		 62/* mgmt header + 1 byte action code */
63#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
64
65#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 68#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 70
07db2183
RR		 71/* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73#define IEEE80211_MIN_AMPDU_BUF 0x8
74#define IEEE80211_MAX_AMPDU_BUF 0x40
75
f0706e82
JB		 76static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78static struct ieee80211_sta_bss *
8318d78a 79ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 80 u8 *ssid, u8 ssid_len);
f0706e82
JB		 81static void ieee80211_rx_bss_put(struct net_device *dev,
82 struct ieee80211_sta_bss *bss);
83static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85static int ieee80211_sta_wep_configured(struct net_device *dev);
86static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
90
91
ee385855
LCC		 92void ieee802_11_parse_elems(u8 *start, size_t len,
93 struct ieee802_11_elems *elems)
f0706e82
JB		 94{
95 size_t left = len;
96 u8 *pos = start;
f0706e82
JB		 97
98 memset(elems, 0, sizeof(*elems));
99
100 while (left >= 2) {
101 u8 id, elen;
102
103 id = *pos++;
104 elen = *pos++;
105 left -= 2;
106
67a4cce4
JL		 107 if (elen > left)
108 return;
f0706e82
JB		 109
110 switch (id) {
111 case WLAN_EID_SSID:
112 elems->ssid = pos;
113 elems->ssid_len = elen;
114 break;
115 case WLAN_EID_SUPP_RATES:
116 elems->supp_rates = pos;
117 elems->supp_rates_len = elen;
118 break;
119 case WLAN_EID_FH_PARAMS:
120 elems->fh_params = pos;
121 elems->fh_params_len = elen;
122 break;
123 case WLAN_EID_DS_PARAMS:
124 elems->ds_params = pos;
125 elems->ds_params_len = elen;
126 break;
127 case WLAN_EID_CF_PARAMS:
128 elems->cf_params = pos;
129 elems->cf_params_len = elen;
130 break;
131 case WLAN_EID_TIM:
132 elems->tim = pos;
133 elems->tim_len = elen;
134 break;
135 case WLAN_EID_IBSS_PARAMS:
136 elems->ibss_params = pos;
137 elems->ibss_params_len = elen;
138 break;
139 case WLAN_EID_CHALLENGE:
140 elems->challenge = pos;
141 elems->challenge_len = elen;
142 break;
143 case WLAN_EID_WPA:
144 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
145 pos[2] == 0xf2) {
146 /* Microsoft OUI (00:50:F2) */
147 if (pos[3] == 1) {
148 /* OUI Type 1 - WPA IE */
149 elems->wpa = pos;
150 elems->wpa_len = elen;
151 } else if (elen >= 5 && pos[3] == 2) {
152 if (pos[4] == 0) {
153 elems->wmm_info = pos;
154 elems->wmm_info_len = elen;
155 } else if (pos[4] == 1) {
156 elems->wmm_param = pos;
157 elems->wmm_param_len = elen;
158 }
159 }
160 }
161 break;
162 case WLAN_EID_RSN:
163 elems->rsn = pos;
164 elems->rsn_len = elen;
165 break;
166 case WLAN_EID_ERP_INFO:
167 elems->erp_info = pos;
168 elems->erp_info_len = elen;
169 break;
170 case WLAN_EID_EXT_SUPP_RATES:
171 elems->ext_supp_rates = pos;
172 elems->ext_supp_rates_len = elen;
173 break;
c7153508
RR		 174 case WLAN_EID_HT_CAPABILITY:
175 elems->ht_cap_elem = pos;
176 elems->ht_cap_elem_len = elen;
177 break;
178 case WLAN_EID_HT_EXTRA_INFO:
179 elems->ht_info_elem = pos;
180 elems->ht_info_elem_len = elen;
181 break;
ee385855
LCC		 182 case WLAN_EID_MESH_ID:
183 elems->mesh_id = pos;
184 elems->mesh_id_len = elen;
185 break;
186 case WLAN_EID_MESH_CONFIG:
187 elems->mesh_config = pos;
188 elems->mesh_config_len = elen;
189 break;
190 case WLAN_EID_PEER_LINK:
191 elems->peer_link = pos;
192 elems->peer_link_len = elen;
193 break;
194 case WLAN_EID_PREQ:
195 elems->preq = pos;
196 elems->preq_len = elen;
197 break;
198 case WLAN_EID_PREP:
199 elems->prep = pos;
200 elems->prep_len = elen;
201 break;
202 case WLAN_EID_PERR:
203 elems->perr = pos;
204 elems->perr_len = elen;
205 break;
f0706e82 206 default:
f0706e82
JB		 207 break;
208 }
209
210 left -= elen;
211 pos += elen;
212 }
f0706e82
JB		 213}
214
215
f0706e82
JB		 216static int ecw2cw(int ecw)
217{
ac2bf324 218 return (1 << ecw) - 1;
f0706e82
JB		 219}
220
e2839d8f
VK		 221
222static void ieee80211_sta_def_wmm_params(struct net_device *dev,
223 struct ieee80211_sta_bss *bss,
224 int ibss)
225{
226 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
227 struct ieee80211_local *local = sdata->local;
228 int i, have_higher_than_11mbit = 0;
229
230
231 /* cf. IEEE 802.11 9.2.12 */
232 for (i = 0; i < bss->supp_rates_len; i++)
233 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
234 have_higher_than_11mbit = 1;
235
236 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
237 have_higher_than_11mbit)
238 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
239 else
240 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
241
242
243 if (local->ops->conf_tx) {
244 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 245
246 memset(&qparam, 0, sizeof(qparam));
247
248 qparam.aifs = 2;
249
250 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
251 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
252 qparam.cw_min = 31;
253 else
254 qparam.cw_min = 15;
255
256 qparam.cw_max = 1023;
257 qparam.txop = 0;
258
259 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
260 local->ops->conf_tx(local_to_hw(local),
261 i + IEEE80211_TX_QUEUE_DATA0,
262 &qparam);
263
264 if (ibss) {
265 /* IBSS uses different parameters for Beacon sending */
266 qparam.cw_min++;
267 qparam.cw_min *= 2;
268 qparam.cw_min--;
269 local->ops->conf_tx(local_to_hw(local),
270 IEEE80211_TX_QUEUE_BEACON, &qparam);
271 }
272 }
273}
274
f0706e82
JB		 275static void ieee80211_sta_wmm_params(struct net_device *dev,
276 struct ieee80211_if_sta *ifsta,
277 u8 *wmm_param, size_t wmm_param_len)
278{
279 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
280 struct ieee80211_tx_queue_params params;
281 size_t left;
282 int count;
283 u8 *pos;
284
285 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
286 return;
287 count = wmm_param[6] & 0x0f;
288 if (count == ifsta->wmm_last_param_set)
289 return;
290 ifsta->wmm_last_param_set = count;
291
292 pos = wmm_param + 8;
293 left = wmm_param_len - 8;
294
295 memset(&params, 0, sizeof(params));
296
297 if (!local->ops->conf_tx)
298 return;
299
300 local->wmm_acm = 0;
301 for (; left >= 4; left -= 4, pos += 4) {
302 int aci = (pos[0] >> 5) & 0x03;
303 int acm = (pos[0] >> 4) & 0x01;
304 int queue;
305
306 switch (aci) {
307 case 1:
308 queue = IEEE80211_TX_QUEUE_DATA3;
309 if (acm) {
310 local->wmm_acm |= BIT(0) | BIT(3);
311 }
312 break;
313 case 2:
314 queue = IEEE80211_TX_QUEUE_DATA1;
315 if (acm) {
316 local->wmm_acm |= BIT(4) | BIT(5);
317 }
318 break;
319 case 3:
320 queue = IEEE80211_TX_QUEUE_DATA0;
321 if (acm) {
322 local->wmm_acm |= BIT(6) | BIT(7);
323 }
324 break;
325 case 0:
326 default:
327 queue = IEEE80211_TX_QUEUE_DATA2;
328 if (acm) {
329 local->wmm_acm |= BIT(1) | BIT(2);
330 }
331 break;
332 }
333
334 params.aifs = pos[0] & 0x0f;
335 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
336 params.cw_min = ecw2cw(pos[1] & 0x0f);
3330d7be
JB		 337 params.txop = pos[2] | (pos[3] << 8);
338#ifdef CONFIG_MAC80211_DEBUG
f0706e82 339 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 340 "cWmin=%d cWmax=%d txop=%d\n",
f0706e82 341 dev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 342 params.cw_max, params.txop);
343#endif
f0706e82
JB		 344 /* TODO: handle ACM (block TX, fallback to next lowest allowed
345 * AC for now) */
346 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
347 printk(KERN_DEBUG "%s: failed to set TX queue "
348 "parameters for queue %d\n", dev->name, queue);
349 }
350 }
351}
352
50c4afb9
JL		 353static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
354 bool use_protection,
355 bool use_short_preamble)
5628221c 356{
471b3efd 357 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
5628221c 358 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 359 DECLARE_MAC_BUF(mac);
471b3efd 360 u32 changed = 0;
5628221c 361
471b3efd 362 if (use_protection != bss_conf->use_cts_prot) {
5628221c
DD		 363 if (net_ratelimit()) {
364 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 365 "%s)\n",
471b3efd 366 sdata->dev->name,
5628221c 367 use_protection ? "enabled" : "disabled",
0795af57 368 print_mac(mac, ifsta->bssid));
5628221c 369 }
471b3efd
JB		 370 bss_conf->use_cts_prot = use_protection;
371 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 372 }
7e9ed188 373
d43c7b37 374 if (use_short_preamble != bss_conf->use_short_preamble) {
7e9ed188
DD		 375 if (net_ratelimit()) {
376 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 377 " (BSSID=%s)\n",
471b3efd 378 sdata->dev->name,
d43c7b37 379 use_short_preamble ? "short" : "long",
0795af57 380 print_mac(mac, ifsta->bssid));
7e9ed188 381 }
d43c7b37 382 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 383 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 384 }
d9430a32 385
471b3efd 386 return changed;
5628221c
DD		 387}
388
50c4afb9
JL		 389static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
390 u8 erp_value)
391{
392 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
393 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
394
395 return ieee80211_handle_protect_preamb(sdata,
396 use_protection, use_short_preamble);
397}
398
399static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
400 struct ieee80211_sta_bss *bss)
401{
402 u32 changed = 0;
403
404 if (bss->has_erp_value)
405 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
406 else {
407 u16 capab = bss->capability;
408 changed |= ieee80211_handle_protect_preamb(sdata, false,
409 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
410 }
411
412 return changed;
413}
414
c7153508
RR		 415int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
416 struct ieee80211_ht_info *ht_info)
417{
418
419 if (ht_info == NULL)
420 return -EINVAL;
421
422 memset(ht_info, 0, sizeof(*ht_info));
423
424 if (ht_cap_ie) {
425 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
426
427 ht_info->ht_supported = 1;
428 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
429 ht_info->ampdu_factor =
430 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
431 ht_info->ampdu_density =
432 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
433 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
434 } else
435 ht_info->ht_supported = 0;
436
437 return 0;
438}
439
440int ieee80211_ht_addt_info_ie_to_ht_bss_info(
441 struct ieee80211_ht_addt_info *ht_add_info_ie,
442 struct ieee80211_ht_bss_info *bss_info)
443{
444 if (bss_info == NULL)
445 return -EINVAL;
446
447 memset(bss_info, 0, sizeof(*bss_info));
448
449 if (ht_add_info_ie) {
450 u16 op_mode;
451 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
452
453 bss_info->primary_channel = ht_add_info_ie->control_chan;
454 bss_info->bss_cap = ht_add_info_ie->ht_param;
455 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
456 }
457
458 return 0;
459}
5628221c 460
f0706e82
JB		 461static void ieee80211_sta_send_associnfo(struct net_device *dev,
462 struct ieee80211_if_sta *ifsta)
463{
464 char *buf;
465 size_t len;
466 int i;
467 union iwreq_data wrqu;
468
469 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
470 return;
471
472 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 473 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 474 if (!buf)
475 return;
476
477 len = sprintf(buf, "ASSOCINFO(");
478 if (ifsta->assocreq_ies) {
479 len += sprintf(buf + len, "ReqIEs=");
480 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
481 len += sprintf(buf + len, "%02x",
482 ifsta->assocreq_ies[i]);
483 }
484 }
485 if (ifsta->assocresp_ies) {
486 if (ifsta->assocreq_ies)
487 len += sprintf(buf + len, " ");
488 len += sprintf(buf + len, "RespIEs=");
489 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
490 len += sprintf(buf + len, "%02x",
491 ifsta->assocresp_ies[i]);
492 }
493 }
494 len += sprintf(buf + len, ")");
495
496 if (len > IW_CUSTOM_MAX) {
497 len = sprintf(buf, "ASSOCRESPIE=");
498 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
499 len += sprintf(buf + len, "%02x",
500 ifsta->assocresp_ies[i]);
501 }
502 }
503
504 memset(&wrqu, 0, sizeof(wrqu));
505 wrqu.data.length = len;
506 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
507
508 kfree(buf);
509}
510
511
512static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 513 struct ieee80211_if_sta *ifsta,
47f0c502 514 bool assoc)
f0706e82 515{
471b3efd
JB		 516 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
517 struct ieee80211_local *local = sdata->local;
38668c05 518 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 519 union iwreq_data wrqu;
471b3efd 520 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 521
f0706e82 522 if (assoc) {
5628221c 523 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 524
525 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
526
51fb61e7 527 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 528 return;
5628221c 529
65c107ab 530 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
38668c05 531 conf->channel->center_freq,
cffdd30d 532 ifsta->ssid, ifsta->ssid_len);
5628221c 533 if (bss) {
21c0cbe7
TW		 534 /* set timing information */
535 sdata->bss_conf.beacon_int = bss->beacon_int;
536 sdata->bss_conf.timestamp = bss->timestamp;
537
50c4afb9 538 changed |= ieee80211_handle_bss_capability(sdata, bss);
21c0cbe7 539
5628221c
DD		 540 ieee80211_rx_bss_put(dev, bss);
541 }
542
38668c05
TW		 543 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
544 changed |= BSS_CHANGED_HT;
545 sdata->bss_conf.assoc_ht = 1;
546 sdata->bss_conf.ht_conf = &conf->ht_conf;
547 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
548 }
549
f0706e82 550 netif_carrier_on(dev);
d6f2da5b 551 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 552 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
553 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
554 ieee80211_sta_send_associnfo(dev, ifsta);
555 } else {
85249e5f 556 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
d6f2da5b 557 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
f0706e82 558 netif_carrier_off(dev);
d9430a32 559 ieee80211_reset_erp_info(dev);
38668c05
TW		 560
561 sdata->bss_conf.assoc_ht = 0;
562 sdata->bss_conf.ht_conf = NULL;
563 sdata->bss_conf.ht_bss_conf = NULL;
564
f0706e82
JB		 565 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
566 }
f0706e82 567 ifsta->last_probe = jiffies;
47f0c502 568 ieee80211_led_assoc(local, assoc);
471b3efd 569
b2205256 570 sdata->bss_conf.assoc = assoc;
471b3efd 571 ieee80211_bss_info_change_notify(sdata, changed);
41a7be48
RC		 572 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
573 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
f0706e82
JB		 574}
575
576static void ieee80211_set_disassoc(struct net_device *dev,
577 struct ieee80211_if_sta *ifsta, int deauth)
578{
579 if (deauth)
580 ifsta->auth_tries = 0;
581 ifsta->assoc_tries = 0;
582 ieee80211_set_associated(dev, ifsta, 0);
583}
584
ee385855
LCC		 585void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
586 int encrypt)
f0706e82
JB		 587{
588 struct ieee80211_sub_if_data *sdata;
589 struct ieee80211_tx_packet_data *pkt_data;
590
591 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
592 skb->dev = sdata->local->mdev;
593 skb_set_mac_header(skb, 0);
594 skb_set_network_header(skb, 0);
595 skb_set_transport_header(skb, 0);
596
597 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
598 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
599 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 600 if (!encrypt)
601 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 602
603 dev_queue_xmit(skb);
604}
605
606
607static void ieee80211_send_auth(struct net_device *dev,
608 struct ieee80211_if_sta *ifsta,
609 int transaction, u8 *extra, size_t extra_len,
610 int encrypt)
611{
612 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
613 struct sk_buff *skb;
614 struct ieee80211_mgmt *mgmt;
615
616 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
617 sizeof(*mgmt) + 6 + extra_len);
618 if (!skb) {
619 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
620 "frame\n", dev->name);
621 return;
622 }
623 skb_reserve(skb, local->hw.extra_tx_headroom);
624
625 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
626 memset(mgmt, 0, 24 + 6);
627 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
628 IEEE80211_STYPE_AUTH);
629 if (encrypt)
630 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
631 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
632 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
633 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
634 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
635 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
636 ifsta->auth_transaction = transaction + 1;
637 mgmt->u.auth.status_code = cpu_to_le16(0);
638 if (extra)
639 memcpy(skb_put(skb, extra_len), extra, extra_len);
640
641 ieee80211_sta_tx(dev, skb, encrypt);
642}
643
644
645static void ieee80211_authenticate(struct net_device *dev,
646 struct ieee80211_if_sta *ifsta)
647{
0795af57
JP		 648 DECLARE_MAC_BUF(mac);
649
f0706e82
JB		 650 ifsta->auth_tries++;
651 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 652 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 653 " timed out\n",
0795af57 654 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 655 ifsta->state = IEEE80211_DISABLED;
656 return;
657 }
658
659 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 660 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
661 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 662
663 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
664
665 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
666}
667
668
669static void ieee80211_send_assoc(struct net_device *dev,
670 struct ieee80211_if_sta *ifsta)
671{
672 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 673 struct sk_buff *skb;
674 struct ieee80211_mgmt *mgmt;
675 u8 *pos, *ies;
676 int i, len;
677 u16 capab;
678 struct ieee80211_sta_bss *bss;
679 int wmm = 0;
8318d78a 680 struct ieee80211_supported_band *sband;
f0706e82
JB		 681
682 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
683 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
684 ifsta->ssid_len);
685 if (!skb) {
686 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
687 "frame\n", dev->name);
688 return;
689 }
690 skb_reserve(skb, local->hw.extra_tx_headroom);
691
8318d78a
JB		 692 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
693
f0706e82 694 capab = ifsta->capab;
8318d78a
JB		 695
696 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
697 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
698 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
699 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
700 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 701 }
8318d78a
JB		 702
703 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
704 local->hw.conf.channel->center_freq,
cffdd30d 705 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 706 if (bss) {
707 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
708 capab |= WLAN_CAPABILITY_PRIVACY;
709 if (bss->wmm_ie) {
710 wmm = 1;
711 }
712 ieee80211_rx_bss_put(dev, bss);
713 }
714
715 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
716 memset(mgmt, 0, 24);
717 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
718 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
719 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
720
d6f2da5b 721 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 722 skb_put(skb, 10);
723 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
724 IEEE80211_STYPE_REASSOC_REQ);
725 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
726 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
727 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
728 ETH_ALEN);
729 } else {
730 skb_put(skb, 4);
731 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
732 IEEE80211_STYPE_ASSOC_REQ);
733 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
734 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
735 }
736
737 /* SSID */
738 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
739 *pos++ = WLAN_EID_SSID;
740 *pos++ = ifsta->ssid_len;
741 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
742
8318d78a 743 len = sband->n_bitrates;
f0706e82
JB		 744 if (len > 8)
745 len = 8;
746 pos = skb_put(skb, len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = len;
749 for (i = 0; i < len; i++) {
8318d78a 750 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 751 *pos++ = (u8) (rate / 5);
752 }
753
8318d78a
JB		 754 if (sband->n_bitrates > len) {
755 pos = skb_put(skb, sband->n_bitrates - len + 2);
f0706e82 756 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8318d78a
JB		 757 *pos++ = sband->n_bitrates - len;
758 for (i = len; i < sband->n_bitrates; i++) {
759 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 760 *pos++ = (u8) (rate / 5);
761 }
762 }
763
764 if (ifsta->extra_ie) {
765 pos = skb_put(skb, ifsta->extra_ie_len);
766 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
767 }
768
d6f2da5b 769 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 770 pos = skb_put(skb, 9);
771 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
772 *pos++ = 7; /* len */
773 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
774 *pos++ = 0x50;
775 *pos++ = 0xf2;
776 *pos++ = 2; /* WME */
777 *pos++ = 0; /* WME info */
778 *pos++ = 1; /* WME ver */
779 *pos++ = 0;
780 }
c7153508 781 /* wmm support is a must to HT */
8318d78a
JB		 782 if (wmm && sband->ht_info.ht_supported) {
783 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
c7153508
RR		 784 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
785 *pos++ = WLAN_EID_HT_CAPABILITY;
786 *pos++ = sizeof(struct ieee80211_ht_cap);
787 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
788 memcpy(pos, &tmp, sizeof(u16));
789 pos += sizeof(u16);
8318d78a
JB		 790 /* TODO: needs a define here for << 2 */
791 *pos++ = sband->ht_info.ampdu_factor |
792 (sband->ht_info.ampdu_density << 2);
793 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 794 }
f0706e82
JB		 795
796 kfree(ifsta->assocreq_ies);
797 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 798 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 799 if (ifsta->assocreq_ies)
800 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
801
802 ieee80211_sta_tx(dev, skb, 0);
803}
804
805
806static void ieee80211_send_deauth(struct net_device *dev,
807 struct ieee80211_if_sta *ifsta, u16 reason)
808{
809 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
810 struct sk_buff *skb;
811 struct ieee80211_mgmt *mgmt;
812
813 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
814 if (!skb) {
815 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
816 "frame\n", dev->name);
817 return;
818 }
819 skb_reserve(skb, local->hw.extra_tx_headroom);
820
821 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
822 memset(mgmt, 0, 24);
823 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
824 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
825 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
826 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
827 IEEE80211_STYPE_DEAUTH);
828 skb_put(skb, 2);
829 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
830
831 ieee80211_sta_tx(dev, skb, 0);
832}
833
834
835static void ieee80211_send_disassoc(struct net_device *dev,
836 struct ieee80211_if_sta *ifsta, u16 reason)
837{
838 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
839 struct sk_buff *skb;
840 struct ieee80211_mgmt *mgmt;
841
842 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
843 if (!skb) {
844 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
845 "frame\n", dev->name);
846 return;
847 }
848 skb_reserve(skb, local->hw.extra_tx_headroom);
849
850 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
851 memset(mgmt, 0, 24);
852 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
853 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
854 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
855 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
856 IEEE80211_STYPE_DISASSOC);
857 skb_put(skb, 2);
858 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
859
860 ieee80211_sta_tx(dev, skb, 0);
861}
862
863
864static int ieee80211_privacy_mismatch(struct net_device *dev,
865 struct ieee80211_if_sta *ifsta)
866{
65c107ab 867 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 868 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 869 int bss_privacy;
870 int wep_privacy;
871 int privacy_invoked;
f0706e82 872
5b98b1f7 873 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 874 return 0;
875
8318d78a
JB		 876 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
877 local->hw.conf.channel->center_freq,
cffdd30d 878 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 879 if (!bss)
880 return 0;
881
5b98b1f7
JB		 882 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
883 wep_privacy = !!ieee80211_sta_wep_configured(dev);
884 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 885
886 ieee80211_rx_bss_put(dev, bss);
887
5b98b1f7
JB		 888 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
889 return 0;
890
891 return 1;
f0706e82
JB		 892}
893
894
895static void ieee80211_associate(struct net_device *dev,
896 struct ieee80211_if_sta *ifsta)
897{
0795af57
JP		 898 DECLARE_MAC_BUF(mac);
899
f0706e82
JB		 900 ifsta->assoc_tries++;
901 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 902 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 903 " timed out\n",
0795af57 904 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 905 ifsta->state = IEEE80211_DISABLED;
906 return;
907 }
908
909 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 910 printk(KERN_DEBUG "%s: associate with AP %s\n",
911 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 912 if (ieee80211_privacy_mismatch(dev, ifsta)) {
913 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
914 "mixed-cell disabled - abort association\n", dev->name);
915 ifsta->state = IEEE80211_DISABLED;
916 return;
917 }
918
919 ieee80211_send_assoc(dev, ifsta);
920
921 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
922}
923
924
925static void ieee80211_associated(struct net_device *dev,
926 struct ieee80211_if_sta *ifsta)
927{
928 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
929 struct sta_info *sta;
930 int disassoc;
0795af57 931 DECLARE_MAC_BUF(mac);
f0706e82
JB		 932
933 /* TODO: start monitoring current AP signal quality and number of
934 * missed beacons. Scan other channels every now and then and search
935 * for better APs. */
936 /* TODO: remove expired BSSes */
937
938 ifsta->state = IEEE80211_ASSOCIATED;
939
d0709a65
JB		 940 rcu_read_lock();
941
f0706e82
JB		 942 sta = sta_info_get(local, ifsta->bssid);
943 if (!sta) {
0795af57
JP		 944 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
945 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 946 disassoc = 1;
947 } else {
948 disassoc = 0;
949 if (time_after(jiffies,
950 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 951 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 952 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 953 "current AP %s - assume out of "
f0706e82 954 "range\n",
0795af57 955 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 956 disassoc = 1;
d0709a65 957 sta_info_unlink(&sta);
d6f2da5b 958 } else
f0706e82
JB		 959 ieee80211_send_probe_req(dev, ifsta->bssid,
960 local->scan_ssid,
961 local->scan_ssid_len);
d6f2da5b 962 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 963 } else {
d6f2da5b 964 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 965 if (time_after(jiffies, ifsta->last_probe +
966 IEEE80211_PROBE_INTERVAL)) {
967 ifsta->last_probe = jiffies;
968 ieee80211_send_probe_req(dev, ifsta->bssid,
969 ifsta->ssid,
970 ifsta->ssid_len);
971 }
972 }
f0706e82 973 }
d0709a65
JB		 974
975 rcu_read_unlock();
976
3b96766f 977 if (disassoc && sta)
d0709a65 978 sta_info_destroy(sta);
d0709a65 979
f0706e82 980 if (disassoc) {
2d192d95
MW		 981 ifsta->state = IEEE80211_DISABLED;
982 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 983 } else {
984 mod_timer(&ifsta->timer, jiffies +
985 IEEE80211_MONITORING_INTERVAL);
986 }
987}
988
989
990static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
991 u8 *ssid, size_t ssid_len)
992{
993 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 994 struct ieee80211_supported_band *sband;
f0706e82
JB		 995 struct sk_buff *skb;
996 struct ieee80211_mgmt *mgmt;
997 u8 *pos, *supp_rates, *esupp_rates = NULL;
998 int i;
999
1000 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1001 if (!skb) {
1002 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1003 "request\n", dev->name);
1004 return;
1005 }
1006 skb_reserve(skb, local->hw.extra_tx_headroom);
1007
1008 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1009 memset(mgmt, 0, 24);
1010 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1011 IEEE80211_STYPE_PROBE_REQ);
1012 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1013 if (dst) {
1014 memcpy(mgmt->da, dst, ETH_ALEN);
1015 memcpy(mgmt->bssid, dst, ETH_ALEN);
1016 } else {
1017 memset(mgmt->da, 0xff, ETH_ALEN);
1018 memset(mgmt->bssid, 0xff, ETH_ALEN);
1019 }
1020 pos = skb_put(skb, 2 + ssid_len);
1021 *pos++ = WLAN_EID_SSID;
1022 *pos++ = ssid_len;
1023 memcpy(pos, ssid, ssid_len);
1024
1025 supp_rates = skb_put(skb, 2);
1026 supp_rates[0] = WLAN_EID_SUPP_RATES;
1027 supp_rates[1] = 0;
8318d78a
JB		 1028 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1029
1030 for (i = 0; i < sband->n_bitrates; i++) {
1031 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 1032 if (esupp_rates) {
1033 pos = skb_put(skb, 1);
1034 esupp_rates[1]++;
1035 } else if (supp_rates[1] == 8) {
1036 esupp_rates = skb_put(skb, 3);
1037 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1038 esupp_rates[1] = 1;
1039 pos = &esupp_rates[2];
1040 } else {
1041 pos = skb_put(skb, 1);
1042 supp_rates[1]++;
1043 }
8318d78a 1044 *pos = rate->bitrate / 5;
f0706e82
JB		 1045 }
1046
1047 ieee80211_sta_tx(dev, skb, 0);
1048}
1049
1050
1051static int ieee80211_sta_wep_configured(struct net_device *dev)
1052{
1053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054 if (!sdata || !sdata->default_key ||
8f20fc24 1055 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 1056 return 0;
1057 return 1;
1058}
1059
1060
1061static void ieee80211_auth_completed(struct net_device *dev,
1062 struct ieee80211_if_sta *ifsta)
1063{
1064 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 1065 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1066 ieee80211_associate(dev, ifsta);
1067}
1068
1069
1070static void ieee80211_auth_challenge(struct net_device *dev,
1071 struct ieee80211_if_sta *ifsta,
1072 struct ieee80211_mgmt *mgmt,
1073 size_t len)
1074{
1075 u8 *pos;
1076 struct ieee802_11_elems elems;
1077
1078 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1079 pos = mgmt->u.auth.variable;
67a4cce4 1080 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1081 if (!elems.challenge) {
1082 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1083 "frame\n", dev->name);
1084 return;
1085 }
1086 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1087 elems.challenge_len + 2, 1);
1088}
1089
9f985b0e
RR		 1090static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1091 u8 dialog_token, u16 status, u16 policy,
1092 u16 buf_size, u16 timeout)
1093{
1094 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1095 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1096 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1097 struct sk_buff *skb;
1098 struct ieee80211_mgmt *mgmt;
1099 u16 capab;
1100
07db2183
RR		 1101 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1102 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1103 if (!skb) {
1104 printk(KERN_DEBUG "%s: failed to allocate buffer "
1105 "for addba resp frame\n", dev->name);
1106 return;
1107 }
1108
1109 skb_reserve(skb, local->hw.extra_tx_headroom);
1110 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1111 memset(mgmt, 0, 24);
1112 memcpy(mgmt->da, da, ETH_ALEN);
1113 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1114 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1115 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1116 else
1117 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1118 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1119 IEEE80211_STYPE_ACTION);
1120
1121 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1122 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1123 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1124 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1125
1126 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1127 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1128 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1129
1130 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1131 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1132 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1133
1134 ieee80211_sta_tx(dev, skb, 0);
1135
1136 return;
1137}
1138
eadc8d9e
RR		 1139void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1140 u16 tid, u8 dialog_token, u16 start_seq_num,
1141 u16 agg_size, u16 timeout)
1142{
1143 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1144 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1145 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1146 struct sk_buff *skb;
1147 struct ieee80211_mgmt *mgmt;
1148 u16 capab;
1149
1150 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1151 sizeof(mgmt->u.action.u.addba_req));
1152
1153
1154 if (!skb) {
1155 printk(KERN_ERR "%s: failed to allocate buffer "
1156 "for addba request frame\n", dev->name);
1157 return;
1158 }
1159 skb_reserve(skb, local->hw.extra_tx_headroom);
1160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1161 memset(mgmt, 0, 24);
1162 memcpy(mgmt->da, da, ETH_ALEN);
1163 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1164 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1165 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1166 else
1167 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1168
1169 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1170 IEEE80211_STYPE_ACTION);
1171
1172 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1173
1174 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1175 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1176
1177 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1178 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1179 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1180 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1181
1182 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1183
1184 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1185 mgmt->u.action.u.addba_req.start_seq_num =
1186 cpu_to_le16(start_seq_num << 4);
1187
1188 ieee80211_sta_tx(dev, skb, 0);
1189}
1190
9f985b0e
RR		 1191static void ieee80211_sta_process_addba_request(struct net_device *dev,
1192 struct ieee80211_mgmt *mgmt,
1193 size_t len)
1194{
1195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1196 struct ieee80211_hw *hw = &local->hw;
1197 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1198 struct sta_info *sta;
07db2183
RR		 1199 struct tid_ampdu_rx *tid_agg_rx;
1200 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1201 u8 dialog_token;
07db2183
RR		 1202 int ret = -EOPNOTSUPP;
1203 DECLARE_MAC_BUF(mac);
9f985b0e 1204
d0709a65
JB		 1205 rcu_read_lock();
1206
9f985b0e 1207 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1208 if (!sta) {
1209 rcu_read_unlock();
9f985b0e 1210 return;
d0709a65 1211 }
9f985b0e
RR		 1212
1213 /* extract session parameters from addba request frame */
1214 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1215 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1216 start_seq_num =
1217 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1218
1219 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1220 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1221 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1222 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1223
9f985b0e
RR		 1224 status = WLAN_STATUS_REQUEST_DECLINED;
1225
07db2183
RR		 1226 /* sanity check for incoming parameters:
1227 * check if configuration can support the BA policy
1228 * and if buffer size does not exceeds max value */
1229 if (((ba_policy != 1)
1230 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1231 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1232 status = WLAN_STATUS_INVALID_QOS_PARAM;
1233#ifdef CONFIG_MAC80211_HT_DEBUG
1234 if (net_ratelimit())
7b9d44cd 1235 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1236 "%s on tid %u. policy %d, buffer size %d\n",
1237 print_mac(mac, mgmt->sa), tid, ba_policy,
1238 buf_size);
1239#endif /* CONFIG_MAC80211_HT_DEBUG */
1240 goto end_no_lock;
1241 }
1242 /* determine default buffer size */
1243 if (buf_size == 0) {
8318d78a
JB		 1244 struct ieee80211_supported_band *sband;
1245
1246 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1247 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1248 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1249 }
1250
07db2183
RR		 1251
1252 /* examine state machine */
1253 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1254
cee24a3e 1255 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1256#ifdef CONFIG_MAC80211_HT_DEBUG
1257 if (net_ratelimit())
7b9d44cd 1258 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1259 "%s on tid %u\n",
1260 print_mac(mac, mgmt->sa), tid);
1261#endif /* CONFIG_MAC80211_HT_DEBUG */
1262 goto end;
1263 }
1264
cee24a3e
RR		 1265 /* prepare A-MPDU MLME for Rx aggregation */
1266 sta->ampdu_mlme.tid_rx[tid] =
1267 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1268 if (!sta->ampdu_mlme.tid_rx[tid]) {
1269 if (net_ratelimit())
1270 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1271 tid);
1272 goto end;
1273 }
1274 /* rx timer */
1275 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1276 sta_rx_agg_session_timer_expired;
1277 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1278 (unsigned long)&sta->timer_to_tid[tid];
1279 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1280
1281 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1282
07db2183
RR		 1283 /* prepare reordering buffer */
1284 tid_agg_rx->reorder_buf =
1285 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1286 if (!tid_agg_rx->reorder_buf) {
1287 if (net_ratelimit())
1288 printk(KERN_ERR "can not allocate reordering buffer "
1289 "to tid %d\n", tid);
cee24a3e 1290 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1291 goto end;
1292 }
1293 memset(tid_agg_rx->reorder_buf, 0,
1294 buf_size * sizeof(struct sk_buf *));
1295
1296 if (local->ops->ampdu_action)
1297 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1298 sta->addr, tid, &start_seq_num);
07db2183 1299#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1300 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1301#endif /* CONFIG_MAC80211_HT_DEBUG */
1302
1303 if (ret) {
1304 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1305 kfree(tid_agg_rx);
1306 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1307 goto end;
1308 }
1309
1310 /* change state and send addba resp */
cee24a3e 1311 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1312 tid_agg_rx->dialog_token = dialog_token;
1313 tid_agg_rx->ssn = start_seq_num;
1314 tid_agg_rx->head_seq_num = start_seq_num;
1315 tid_agg_rx->buf_size = buf_size;
1316 tid_agg_rx->timeout = timeout;
1317 tid_agg_rx->stored_mpdu_num = 0;
1318 status = WLAN_STATUS_SUCCESS;
1319end:
1320 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1321
1322end_no_lock:
d0709a65
JB		 1323 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1324 dialog_token, status, 1, buf_size, timeout);
1325 rcu_read_unlock();
9f985b0e 1326}
f0706e82 1327
eadc8d9e
RR		 1328static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1329 struct ieee80211_mgmt *mgmt,
1330 size_t len)
1331{
1332 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1333 struct ieee80211_hw *hw = &local->hw;
1334 struct sta_info *sta;
1335 u16 capab;
1336 u16 tid;
1337 u8 *state;
1338
d0709a65
JB		 1339 rcu_read_lock();
1340
eadc8d9e 1341 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1342 if (!sta) {
1343 rcu_read_unlock();
eadc8d9e 1344 return;
d0709a65 1345 }
eadc8d9e
RR		 1346
1347 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1348 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1349
cee24a3e 1350 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1351
1352 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1353
cee24a3e
RR		 1354 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1355 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1356 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1357 "%d\n", *state);
1358 goto addba_resp_exit;
1359 }
1360
eadc8d9e 1361 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1362 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
eadc8d9e
RR		 1363 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1364#ifdef CONFIG_MAC80211_HT_DEBUG
1365 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1366#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1367 goto addba_resp_exit;
eadc8d9e
RR		 1368 }
1369
cee24a3e 1370 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1371#ifdef CONFIG_MAC80211_HT_DEBUG
1372 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1373#endif /* CONFIG_MAC80211_HT_DEBUG */
1374 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1375 == WLAN_STATUS_SUCCESS) {
eadc8d9e
RR		 1376 if (*state & HT_ADDBA_RECEIVED_MSK)
1377 printk(KERN_DEBUG "double addBA response\n");
1378
1379 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1380 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e
RR		 1381
1382 if (*state == HT_AGG_STATE_OPERATIONAL) {
1383 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1384 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1385 }
1386
1387 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1388 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1389 } else {
1390 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1391
cee24a3e 1392 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1393 /* this will allow the state check in stop_BA_session */
1394 *state = HT_AGG_STATE_OPERATIONAL;
1395 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1396 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1397 WLAN_BACK_INITIATOR);
1398 }
cee24a3e
RR		 1399
1400addba_resp_exit:
d0709a65 1401 rcu_read_unlock();
eadc8d9e
RR		 1402}
1403
1404void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1405 u16 initiator, u16 reason_code)
07db2183
RR		 1406{
1407 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1408 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1409 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1410 struct sk_buff *skb;
1411 struct ieee80211_mgmt *mgmt;
1412 u16 params;
1413
1414 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1415 sizeof(mgmt->u.action.u.delba));
1416
1417 if (!skb) {
1418 printk(KERN_ERR "%s: failed to allocate buffer "
1419 "for delba frame\n", dev->name);
1420 return;
1421 }
1422
1423 skb_reserve(skb, local->hw.extra_tx_headroom);
1424 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1425 memset(mgmt, 0, 24);
1426 memcpy(mgmt->da, da, ETH_ALEN);
1427 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1428 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1429 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1430 else
1431 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1432 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1433 IEEE80211_STYPE_ACTION);
1434
1435 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1436
1437 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1438 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1439 params = (u16)(initiator << 11); /* bit 11 initiator */
1440 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1441
1442 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1443 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1444
1445 ieee80211_sta_tx(dev, skb, 0);
1446}
1447
1448void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1449 u16 initiator, u16 reason)
1450{
1451 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1452 struct ieee80211_hw *hw = &local->hw;
1453 struct sta_info *sta;
b580781e 1454 int ret, i;
513a1025 1455 DECLARE_MAC_BUF(mac);
07db2183 1456
d0709a65
JB		 1457 rcu_read_lock();
1458
07db2183 1459 sta = sta_info_get(local, ra);
d0709a65
JB		 1460 if (!sta) {
1461 rcu_read_unlock();
07db2183 1462 return;
d0709a65 1463 }
07db2183
RR		 1464
1465 /* check if TID is in operational state */
1466 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
cee24a3e 1467 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183
RR		 1468 != HT_AGG_STATE_OPERATIONAL) {
1469 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
d0709a65 1470 rcu_read_unlock();
07db2183
RR		 1471 return;
1472 }
cee24a3e 1473 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1474 HT_AGG_STATE_REQ_STOP_BA_MSK |
1475 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
513a1025 1476 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
07db2183
RR		 1477
1478 /* stop HW Rx aggregation. ampdu_action existence
1479 * already verified in session init so we add the BUG_ON */
1480 BUG_ON(!local->ops->ampdu_action);
1481
513a1025
RR		 1482#ifdef CONFIG_MAC80211_HT_DEBUG
1483 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1484 print_mac(mac, ra), tid);
1485#endif /* CONFIG_MAC80211_HT_DEBUG */
1486
07db2183 1487 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1488 ra, tid, NULL);
07db2183
RR		 1489 if (ret)
1490 printk(KERN_DEBUG "HW problem - can not stop rx "
1491 "aggergation for tid %d\n", tid);
1492
1493 /* shutdown timer has not expired */
1494 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1495 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1496
1497 /* check if this is a self generated aggregation halt */
1498 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1499 ieee80211_send_delba(dev, ra, tid, 0, reason);
1500
1501 /* free the reordering buffer */
cee24a3e
RR		 1502 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1503 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1504 /* release the reordered frames */
cee24a3e
RR		 1505 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1506 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1507 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1508 }
1509 }
cee24a3e
RR		 1510 /* free resources */
1511 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1512 kfree(sta->ampdu_mlme.tid_rx[tid]);
1513 sta->ampdu_mlme.tid_rx[tid] = NULL;
1514 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1515
d0709a65 1516 rcu_read_unlock();
07db2183
RR		 1517}
1518
eadc8d9e 1519
688b88a4
RR		 1520static void ieee80211_sta_process_delba(struct net_device *dev,
1521 struct ieee80211_mgmt *mgmt, size_t len)
1522{
1523 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1524 struct sta_info *sta;
1525 u16 tid, params;
1526 u16 initiator;
1527 DECLARE_MAC_BUF(mac);
1528
d0709a65
JB		 1529 rcu_read_lock();
1530
688b88a4 1531 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1532 if (!sta) {
1533 rcu_read_unlock();
688b88a4 1534 return;
d0709a65 1535 }
688b88a4
RR		 1536
1537 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1538 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1539 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1540
1541#ifdef CONFIG_MAC80211_HT_DEBUG
1542 if (net_ratelimit())
d92684e6
RR		 1543 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1544 print_mac(mac, mgmt->sa),
2e354ed7 1545 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1546 mgmt->u.action.u.delba.reason_code);
1547#endif /* CONFIG_MAC80211_HT_DEBUG */
1548
1549 if (initiator == WLAN_BACK_INITIATOR)
1550 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1551 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1552 else { /* WLAN_BACK_RECIPIENT */
1553 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
cee24a3e 1554 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6
RR		 1555 HT_AGG_STATE_OPERATIONAL;
1556 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1557 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1558 WLAN_BACK_RECIPIENT);
1559 }
d0709a65 1560 rcu_read_unlock();
688b88a4
RR		 1561}
1562
eadc8d9e
RR		 1563/*
1564 * After sending add Block Ack request we activated a timer until
1565 * add Block Ack response will arrive from the recipient.
1566 * If this timer expires sta_addba_resp_timer_expired will be executed.
1567 */
1568void sta_addba_resp_timer_expired(unsigned long data)
1569{
1570 /* not an elegant detour, but there is no choice as the timer passes
1571 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1572 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e
RR		 1573 * array gives the sta through container_of */
1574 u16 tid = *(int *)data;
1575 struct sta_info *temp_sta = container_of((void *)data,
1576 struct sta_info, timer_to_tid[tid]);
1577
1578 struct ieee80211_local *local = temp_sta->local;
1579 struct ieee80211_hw *hw = &local->hw;
1580 struct sta_info *sta;
1581 u8 *state;
1582
d0709a65
JB		 1583 rcu_read_lock();
1584
eadc8d9e 1585 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1586 if (!sta) {
1587 rcu_read_unlock();
eadc8d9e 1588 return;
d0709a65 1589 }
eadc8d9e 1590
cee24a3e 1591 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1592 /* check if the TID waits for addBA response */
1593 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1594 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1595 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1596 *state = HT_AGG_STATE_IDLE;
1597 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1598 "expecting addBA response there", tid);
1599 goto timer_expired_exit;
1600 }
1601
1602 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1603
1604 /* go through the state check in stop_BA_session */
1605 *state = HT_AGG_STATE_OPERATIONAL;
1606 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1607 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1608 WLAN_BACK_INITIATOR);
1609
1610timer_expired_exit:
d0709a65 1611 rcu_read_unlock();
eadc8d9e
RR		 1612}
1613
07db2183 1614/*
7b9d44cd
RR		 1615 * After accepting the AddBA Request we activated a timer,
1616 * resetting it after each frame that arrives from the originator.
07db2183
RR		 1617 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1618 */
1619void sta_rx_agg_session_timer_expired(unsigned long data)
1620{
1621 /* not an elegant detour, but there is no choice as the timer passes
1622 * only one argument, and verious sta_info are needed here, so init
73651ee6 1623 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1624 * array gives the sta through container_of */
1625 u8 *ptid = (u8 *)data;
1626 u8 *timer_to_id = ptid - *ptid;
1627 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1628 timer_to_tid[0]);
1629
1630 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
d0709a65
JB		 1631 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1632 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1633 WLAN_REASON_QSTA_TIMEOUT);
1634}
1635
85249e5f
RR		 1636void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1637{
1638 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1639 int i;
1640
1641 for (i = 0; i < STA_TID_NUM; i++) {
1642 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1643 WLAN_BACK_INITIATOR);
1644 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1645 WLAN_BACK_RECIPIENT,
1646 WLAN_REASON_QSTA_LEAVE_QBSS);
1647 }
1648}
07db2183 1649
f0706e82
JB		 1650static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1651 struct ieee80211_if_sta *ifsta,
1652 struct ieee80211_mgmt *mgmt,
1653 size_t len)
1654{
1655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1656 u16 auth_alg, auth_transaction, status_code;
0795af57 1657 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1658
1659 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1660 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1661 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1662 "%s, but not in authenticate state - ignored\n",
1663 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1664 return;
1665 }
1666
1667 if (len < 24 + 6) {
1668 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1669 "received from %s - ignored\n",
1670 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1671 return;
1672 }
1673
51fb61e7 1674 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1675 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1676 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1677 "unknown AP (SA=%s BSSID=%s) - "
1678 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1679 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1680 return;
1681 }
1682
51fb61e7 1683 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1684 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1685 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1686 "unknown BSSID (SA=%s BSSID=%s) - "
1687 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1688 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1689 return;
1690 }
1691
1692 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1693 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1694 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1695
0795af57 1696 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1697 "transaction=%d status=%d)\n",
0795af57 1698 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1699 auth_transaction, status_code);
1700
51fb61e7 1701 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1702 /* IEEE 802.11 standard does not require authentication in IBSS
1703 * networks and most implementations do not seem to use it.
1704 * However, try to reply to authentication attempts if someone
1705 * has actually implemented this.
1706 * TODO: Could implement shared key authentication. */
1707 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1708 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1709 "frame (alg=%d transaction=%d)\n",
1710 dev->name, auth_alg, auth_transaction);
1711 return;
1712 }
1713 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1714 }
1715
1716 if (auth_alg != ifsta->auth_alg ||
1717 auth_transaction != ifsta->auth_transaction) {
1718 printk(KERN_DEBUG "%s: unexpected authentication frame "
1719 "(alg=%d transaction=%d)\n",
1720 dev->name, auth_alg, auth_transaction);
1721 return;
1722 }
1723
1724 if (status_code != WLAN_STATUS_SUCCESS) {
1725 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1726 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1727 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1728 u8 algs[3];
1729 const int num_algs = ARRAY_SIZE(algs);
1730 int i, pos;
1731 algs[0] = algs[1] = algs[2] = 0xff;
1732 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1733 algs[0] = WLAN_AUTH_OPEN;
1734 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1735 algs[1] = WLAN_AUTH_SHARED_KEY;
1736 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1737 algs[2] = WLAN_AUTH_LEAP;
1738 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1739 pos = 0;
1740 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1741 pos = 1;
1742 else
1743 pos = 2;
1744 for (i = 0; i < num_algs; i++) {
1745 pos++;
1746 if (pos >= num_algs)
1747 pos = 0;
1748 if (algs[pos] == ifsta->auth_alg ||
1749 algs[pos] == 0xff)
1750 continue;
1751 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1752 !ieee80211_sta_wep_configured(dev))
1753 continue;
1754 ifsta->auth_alg = algs[pos];
1755 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1756 "next try\n",
1757 dev->name, ifsta->auth_alg);
1758 break;
1759 }
1760 }
1761 return;
1762 }
1763
1764 switch (ifsta->auth_alg) {
1765 case WLAN_AUTH_OPEN:
1766 case WLAN_AUTH_LEAP:
1767 ieee80211_auth_completed(dev, ifsta);
1768 break;
1769 case WLAN_AUTH_SHARED_KEY:
1770 if (ifsta->auth_transaction == 4)
1771 ieee80211_auth_completed(dev, ifsta);
1772 else
1773 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1774 break;
1775 }
1776}
1777
1778
1779static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1780 struct ieee80211_if_sta *ifsta,
1781 struct ieee80211_mgmt *mgmt,
1782 size_t len)
1783{
1784 u16 reason_code;
0795af57 1785 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1786
1787 if (len < 24 + 2) {
1788 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1789 "received from %s - ignored\n",
1790 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1791 return;
1792 }
1793
1794 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1795 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1796 "unknown AP (SA=%s BSSID=%s) - "
1797 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1798 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1799 return;
1800 }
1801
1802 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1803
0795af57 1804 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1805 " (reason=%d)\n",
0795af57 1806 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1807
d6f2da5b 1808 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1809 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1810 }
1811
1812 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1813 ifsta->state == IEEE80211_ASSOCIATE ||
1814 ifsta->state == IEEE80211_ASSOCIATED) {
1815 ifsta->state = IEEE80211_AUTHENTICATE;
1816 mod_timer(&ifsta->timer, jiffies +
1817 IEEE80211_RETRY_AUTH_INTERVAL);
1818 }
1819
1820 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1821 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1822}
1823
1824
1825static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1826 struct ieee80211_if_sta *ifsta,
1827 struct ieee80211_mgmt *mgmt,
1828 size_t len)
1829{
1830 u16 reason_code;
0795af57 1831 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1832
1833 if (len < 24 + 2) {
1834 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1835 "received from %s - ignored\n",
1836 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1837 return;
1838 }
1839
1840 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1841 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1842 "unknown AP (SA=%s BSSID=%s) - "
1843 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1844 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1845 return;
1846 }
1847
1848 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1849
0795af57 1850 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1851 " (reason=%d)\n",
0795af57 1852 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1853
d6f2da5b 1854 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1855 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1856
1857 if (ifsta->state == IEEE80211_ASSOCIATED) {
1858 ifsta->state = IEEE80211_ASSOCIATE;
1859 mod_timer(&ifsta->timer, jiffies +
1860 IEEE80211_RETRY_AUTH_INTERVAL);
1861 }
1862
1863 ieee80211_set_disassoc(dev, ifsta, 0);
1864}
1865
1866
471b3efd 1867static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1868 struct ieee80211_if_sta *ifsta,
1869 struct ieee80211_mgmt *mgmt,
1870 size_t len,
1871 int reassoc)
1872{
471b3efd
JB		 1873 struct ieee80211_local *local = sdata->local;
1874 struct net_device *dev = sdata->dev;
8318d78a 1875 struct ieee80211_supported_band *sband;
f0706e82 1876 struct sta_info *sta;
8318d78a 1877 u64 rates, basic_rates;
f0706e82
JB		 1878 u16 capab_info, status_code, aid;
1879 struct ieee802_11_elems elems;
471b3efd 1880 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1881 u8 *pos;
1882 int i, j;
0795af57 1883 DECLARE_MAC_BUF(mac);
8318d78a 1884 bool have_higher_than_11mbit = false;
f0706e82
JB		 1885
1886 /* AssocResp and ReassocResp have identical structure, so process both
1887 * of them in this function. */
1888
1889 if (ifsta->state != IEEE80211_ASSOCIATE) {
1890 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1891 "%s, but not in associate state - ignored\n",
1892 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1893 return;
1894 }
1895
1896 if (len < 24 + 6) {
1897 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1898 "received from %s - ignored\n",
1899 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1900 return;
1901 }
1902
1903 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1904 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1905 "unknown AP (SA=%s BSSID=%s) - "
1906 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1907 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1908 return;
1909 }
1910
1911 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1912 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1913 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1914
0795af57 1915 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1916 "status=%d aid=%d)\n",
0795af57 1917 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1918 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1919
1920 if (status_code != WLAN_STATUS_SUCCESS) {
1921 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1922 dev->name, status_code);
8a69aa93
DD		 1923 /* if this was a reassociation, ensure we try a "full"
1924 * association next time. This works around some broken APs
1925 * which do not correctly reject reassociation requests. */
d6f2da5b 1926 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1927 return;
1928 }
1929
1dd84aa2
JB		 1930 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1931 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1932 "set\n", dev->name, aid);
1933 aid &= ~(BIT(15) | BIT(14));
1934
f0706e82 1935 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1936 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1937
1938 if (!elems.supp_rates) {
1939 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1940 dev->name);
1941 return;
1942 }
1943
1944 printk(KERN_DEBUG "%s: associated\n", dev->name);
1945 ifsta->aid = aid;
1946 ifsta->ap_capab = capab_info;
1947
1948 kfree(ifsta->assocresp_ies);
1949 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1950 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1951 if (ifsta->assocresp_ies)
1952 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1953
d0709a65
JB		 1954 rcu_read_lock();
1955
f0706e82
JB		 1956 /* Add STA entry for the AP */
1957 sta = sta_info_get(local, ifsta->bssid);
1958 if (!sta) {
1959 struct ieee80211_sta_bss *bss;
73651ee6 1960 int err;
d0709a65 1961
73651ee6
JB		 1962 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1963 if (!sta) {
1964 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1965 " the AP\n", dev->name);
d0709a65 1966 rcu_read_unlock();
f0706e82
JB		 1967 return;
1968 }
65c107ab 1969 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 1970 local->hw.conf.channel->center_freq,
cffdd30d 1971 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1972 if (bss) {
1973 sta->last_rssi = bss->rssi;
1974 sta->last_signal = bss->signal;
1975 sta->last_noise = bss->noise;
1976 ieee80211_rx_bss_put(dev, bss);
1977 }
73651ee6
JB		 1978
1979 err = sta_info_insert(sta);
1980 if (err) {
1981 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1982 " the AP (error %d)\n", dev->name, err);
73651ee6
JB		 1983 rcu_read_unlock();
1984 return;
1985 }
f0706e82
JB		 1986 }
1987
73651ee6
JB		 1988 /*
1989 * FIXME: Do we really need to update the sta_info's information here?
1990 * We already know about the AP (we found it in our list) so it
1991 * should already be filled with the right info, no?
1992 * As is stands, all this is racy because typically we assume
1993 * the information that is filled in here (except flags) doesn't
1994 * change while a STA structure is alive. As such, it should move
1995 * to between the sta_info_alloc() and sta_info_insert() above.
1996 */
1997
238814fd
JB		 1998 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1999 WLAN_STA_AUTHORIZED;
f0706e82
JB		 2000
2001 rates = 0;
8318d78a
JB		 2002 basic_rates = 0;
2003 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2004
f0706e82
JB		 2005 for (i = 0; i < elems.supp_rates_len; i++) {
2006 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 2007
2008 if (rate > 110)
2009 have_higher_than_11mbit = true;
2010
2011 for (j = 0; j < sband->n_bitrates; j++) {
2012 if (sband->bitrates[j].bitrate == rate)
f0706e82 2013 rates |= BIT(j);
8318d78a
JB		 2014 if (elems.supp_rates[i] & 0x80)
2015 basic_rates |= BIT(j);
2016 }
f0706e82 2017 }
8318d78a 2018
f0706e82
JB		 2019 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2020 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 2021
2022 if (rate > 110)
2023 have_higher_than_11mbit = true;
2024
2025 for (j = 0; j < sband->n_bitrates; j++) {
2026 if (sband->bitrates[j].bitrate == rate)
f0706e82 2027 rates |= BIT(j);
8318d78a
JB		 2028 if (elems.ext_supp_rates[i] & 0x80)
2029 basic_rates |= BIT(j);
2030 }
f0706e82 2031 }
8318d78a
JB		 2032
2033 sta->supp_rates[local->hw.conf.channel->band] = rates;
2034 sdata->basic_rates = basic_rates;
2035
2036 /* cf. IEEE 802.11 9.2.12 */
2037 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2038 have_higher_than_11mbit)
2039 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2040 else
2041 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2042
38668c05 2043 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
d3c990fb 2044 struct ieee80211_ht_bss_info bss_info;
d3c990fb
RR		 2045 ieee80211_ht_cap_ie_to_ht_info(
2046 (struct ieee80211_ht_cap *)
2047 elems.ht_cap_elem, &sta->ht_info);
2048 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2049 (struct ieee80211_ht_addt_info *)
2050 elems.ht_info_elem, &bss_info);
38668c05 2051 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
d3c990fb
RR		 2052 }
2053
f0706e82
JB		 2054 rate_control_rate_init(sta, local);
2055
d6f2da5b 2056 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82 2057 sta->flags |= WLAN_STA_WME;
e5f98f2d 2058 rcu_read_unlock();
f0706e82
JB		 2059 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2060 elems.wmm_param_len);
e5f98f2d
JB		 2061 } else
2062 rcu_read_unlock();
f0706e82 2063
21c0cbe7
TW		 2064 /* set AID and assoc capability,
2065 * ieee80211_set_associated() will tell the driver */
8318d78a 2066 bss_conf->aid = aid;
21c0cbe7 2067 bss_conf->assoc_capability = capab_info;
8318d78a 2068 ieee80211_set_associated(dev, ifsta, 1);
f0706e82 2069
f0706e82
JB		 2070 ieee80211_associated(dev, ifsta);
2071}
2072
2073
2074/* Caller must hold local->sta_bss_lock */
2075static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2076 struct ieee80211_sta_bss *bss)
2077{
2078 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 2079 u8 hash_idx;
902acc78
JB		 2080
2081 if (bss_mesh_cfg(bss))
2082 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2083 bss_mesh_id_len(bss));
f709fc69 2084 else
f709fc69 2085 hash_idx = STA_HASH(bss->bssid);
902acc78 2086
f709fc69
LCC		 2087 bss->hnext = local->sta_bss_hash[hash_idx];
2088 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 2089}
2090
2091
2092/* Caller must hold local->sta_bss_lock */
2093static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2094 struct ieee80211_sta_bss *bss)
2095{
2096 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2097 struct ieee80211_sta_bss *b, *prev = NULL;
2098 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2099 while (b) {
2100 if (b == bss) {
2101 if (!prev)
2102 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2103 bss->hnext;
2104 else
2105 prev->hnext = bss->hnext;
2106 break;
2107 }
2108 prev = b;
2109 b = b->hnext;
2110 }
2111}
2112
2113
2114static struct ieee80211_sta_bss *
8318d78a 2115ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2116 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2117{
2118 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2119 struct ieee80211_sta_bss *bss;
2120
dd00cc48 2121 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 2122 if (!bss)
2123 return NULL;
f0706e82
JB		 2124 atomic_inc(&bss->users);
2125 atomic_inc(&bss->users);
2126 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2127 bss->freq = freq;
cffdd30d
JL		 2128 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2129 memcpy(bss->ssid, ssid, ssid_len);
2130 bss->ssid_len = ssid_len;
2131 }
f0706e82
JB		 2132
2133 spin_lock_bh(&local->sta_bss_lock);
2134 /* TODO: order by RSSI? */
2135 list_add_tail(&bss->list, &local->sta_bss_list);
2136 __ieee80211_rx_bss_hash_add(dev, bss);
2137 spin_unlock_bh(&local->sta_bss_lock);
2138 return bss;
2139}
2140
f0706e82 2141static struct ieee80211_sta_bss *
8318d78a 2142ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2143 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2144{
2145 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2146 struct ieee80211_sta_bss *bss;
2147
2148 spin_lock_bh(&local->sta_bss_lock);
2149 bss = local->sta_bss_hash[STA_HASH(bssid)];
2150 while (bss) {
902acc78
JB		 2151 if (!bss_mesh_cfg(bss) &&
2152 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2153 bss->freq == freq &&
cffdd30d
JL		 2154 bss->ssid_len == ssid_len &&
2155 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2156 atomic_inc(&bss->users);
2157 break;
2158 }
2159 bss = bss->hnext;
2160 }
2161 spin_unlock_bh(&local->sta_bss_lock);
2162 return bss;
2163}
2164
f709fc69
LCC		 2165#ifdef CONFIG_MAC80211_MESH
2166static struct ieee80211_sta_bss *
2167ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2168 u8 *mesh_cfg, int freq)
2169{
2170 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2171 struct ieee80211_sta_bss *bss;
2172
2173 spin_lock_bh(&local->sta_bss_lock);
2174 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2175 while (bss) {
902acc78
JB		 2176 if (bss_mesh_cfg(bss) &&
2177 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2178 bss->freq == freq &&
2179 mesh_id_len == bss->mesh_id_len &&
2180 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2181 mesh_id_len))) {
2182 atomic_inc(&bss->users);
2183 break;
2184 }
2185 bss = bss->hnext;
2186 }
2187 spin_unlock_bh(&local->sta_bss_lock);
2188 return bss;
2189}
2190
2191static struct ieee80211_sta_bss *
2192ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
05e5e883 2193 u8 *mesh_cfg, int mesh_config_len, int freq)
f709fc69
LCC		 2194{
2195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2196 struct ieee80211_sta_bss *bss;
2197
05e5e883
LCC		 2198 if (mesh_config_len != MESH_CFG_LEN)
2199 return NULL;
2200
f709fc69
LCC		 2201 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2202 if (!bss)
2203 return NULL;
2204
24736701 2205 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
f709fc69
LCC		 2206 if (!bss->mesh_cfg) {
2207 kfree(bss);
2208 return NULL;
2209 }
2210
2211 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2212 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2213 if (!bss->mesh_id) {
2214 kfree(bss->mesh_cfg);
2215 kfree(bss);
2216 return NULL;
2217 }
2218 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2219 }
2220
2221 atomic_inc(&bss->users);
2222 atomic_inc(&bss->users);
24736701 2223 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
f709fc69
LCC		 2224 bss->mesh_id_len = mesh_id_len;
2225 bss->freq = freq;
2226 spin_lock_bh(&local->sta_bss_lock);
2227 /* TODO: order by RSSI? */
2228 list_add_tail(&bss->list, &local->sta_bss_list);
2229 __ieee80211_rx_bss_hash_add(dev, bss);
2230 spin_unlock_bh(&local->sta_bss_lock);
2231 return bss;
2232}
2233#endif
f0706e82
JB		 2234
2235static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2236{
2237 kfree(bss->wpa_ie);
2238 kfree(bss->rsn_ie);
2239 kfree(bss->wmm_ie);
c7153508 2240 kfree(bss->ht_ie);
902acc78
JB		 2241 kfree(bss_mesh_id(bss));
2242 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2243 kfree(bss);
2244}
2245
2246
2247static void ieee80211_rx_bss_put(struct net_device *dev,
2248 struct ieee80211_sta_bss *bss)
2249{
2250 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2251 if (!atomic_dec_and_test(&bss->users))
2252 return;
2253
2254 spin_lock_bh(&local->sta_bss_lock);
2255 __ieee80211_rx_bss_hash_del(dev, bss);
2256 list_del(&bss->list);
2257 spin_unlock_bh(&local->sta_bss_lock);
2258 ieee80211_rx_bss_free(bss);
2259}
2260
2261
2262void ieee80211_rx_bss_list_init(struct net_device *dev)
2263{
2264 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2265 spin_lock_init(&local->sta_bss_lock);
2266 INIT_LIST_HEAD(&local->sta_bss_list);
2267}
2268
2269
2270void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2271{
2272 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2273 struct ieee80211_sta_bss *bss, *tmp;
2274
2275 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2276 ieee80211_rx_bss_put(dev, bss);
2277}
2278
2279
a607268a
BR		 2280static int ieee80211_sta_join_ibss(struct net_device *dev,
2281 struct ieee80211_if_sta *ifsta,
2282 struct ieee80211_sta_bss *bss)
2283{
2284 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2285 int res, rates, i, j;
2286 struct sk_buff *skb;
2287 struct ieee80211_mgmt *mgmt;
2288 struct ieee80211_tx_control control;
2289 struct rate_selection ratesel;
2290 u8 *pos;
2291 struct ieee80211_sub_if_data *sdata;
2292 struct ieee80211_supported_band *sband;
2293
2294 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2295
9dd6aed0
JB		 2296 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2297
a607268a 2298 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2299 sta_info_flush_delayed(sdata);
a607268a
BR		 2300
2301 if (local->ops->reset_tsf) {
2302 /* Reset own TSF to allow time synchronization work. */
2303 local->ops->reset_tsf(local_to_hw(local));
2304 }
2305 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2306 res = ieee80211_if_config(dev);
2307 if (res)
2308 return res;
2309
2310 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2311
a607268a
BR		 2312 sdata->drop_unencrypted = bss->capability &
2313 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2314
2315 res = ieee80211_set_freq(local, bss->freq);
2316
2317 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2318 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2319 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2320 return -1;
2321 }
2322
2323 /* Set beacon template */
2324 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2325 do {
2326 if (!skb)
2327 break;
2328
2329 skb_reserve(skb, local->hw.extra_tx_headroom);
2330
2331 mgmt = (struct ieee80211_mgmt *)
2332 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2333 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2334 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2335 IEEE80211_STYPE_BEACON);
2336 memset(mgmt->da, 0xff, ETH_ALEN);
2337 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2338 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2339 mgmt->u.beacon.beacon_int =
2340 cpu_to_le16(local->hw.conf.beacon_int);
2341 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2342
2343 pos = skb_put(skb, 2 + ifsta->ssid_len);
2344 *pos++ = WLAN_EID_SSID;
2345 *pos++ = ifsta->ssid_len;
2346 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2347
2348 rates = bss->supp_rates_len;
2349 if (rates > 8)
2350 rates = 8;
2351 pos = skb_put(skb, 2 + rates);
2352 *pos++ = WLAN_EID_SUPP_RATES;
2353 *pos++ = rates;
2354 memcpy(pos, bss->supp_rates, rates);
2355
2356 if (bss->band == IEEE80211_BAND_2GHZ) {
2357 pos = skb_put(skb, 2 + 1);
2358 *pos++ = WLAN_EID_DS_PARAMS;
2359 *pos++ = 1;
2360 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2361 }
2362
2363 pos = skb_put(skb, 2 + 2);
2364 *pos++ = WLAN_EID_IBSS_PARAMS;
2365 *pos++ = 2;
2366 /* FIX: set ATIM window based on scan results */
2367 *pos++ = 0;
2368 *pos++ = 0;
2369
2370 if (bss->supp_rates_len > 8) {
2371 rates = bss->supp_rates_len - 8;
2372 pos = skb_put(skb, 2 + rates);
2373 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2374 *pos++ = rates;
2375 memcpy(pos, &bss->supp_rates[8], rates);
2376 }
2377
2378 memset(&control, 0, sizeof(control));
2379 rate_control_get_rate(dev, sband, skb, &ratesel);
2380 if (!ratesel.rate) {
2381 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2382 "for IBSS beacon\n", dev->name);
2383 break;
2384 }
2385 control.vif = &sdata->vif;
2386 control.tx_rate = ratesel.rate;
2387 if (sdata->bss_conf.use_short_preamble &&
2388 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2389 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2390 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2391 control.flags |= IEEE80211_TXCTL_NO_ACK;
2392 control.retry_limit = 1;
2393
2394 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2395 if (ifsta->probe_resp) {
2396 mgmt = (struct ieee80211_mgmt *)
2397 ifsta->probe_resp->data;
2398 mgmt->frame_control =
2399 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2400 IEEE80211_STYPE_PROBE_RESP);
2401 } else {
2402 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2403 "template for IBSS\n", dev->name);
2404 }
2405
2406 if (local->ops->beacon_update &&
2407 local->ops->beacon_update(local_to_hw(local),
2408 skb, &control) == 0) {
2409 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2410 "template\n", dev->name);
2411 skb = NULL;
2412 }
2413
2414 rates = 0;
2415 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2416 for (i = 0; i < bss->supp_rates_len; i++) {
2417 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2418 for (j = 0; j < sband->n_bitrates; j++)
2419 if (sband->bitrates[j].bitrate == bitrate)
2420 rates |= BIT(j);
2421 }
2422 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
e2839d8f
VK		 2423
2424 ieee80211_sta_def_wmm_params(dev, bss, 1);
a607268a
BR		 2425 } while (0);
2426
2427 if (skb) {
2428 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2429 "template\n", dev->name);
2430 dev_kfree_skb(skb);
2431 }
2432
2433 ifsta->state = IEEE80211_IBSS_JOINED;
2434 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2435
2436 ieee80211_rx_bss_put(dev, bss);
2437
2438 return res;
2439}
2440
f709fc69
LCC		 2441u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2442 struct ieee802_11_elems *elems,
2443 enum ieee80211_band band)
2444{
2445 struct ieee80211_supported_band *sband;
2446 struct ieee80211_rate *bitrates;
2447 size_t num_rates;
2448 u64 supp_rates;
2449 int i, j;
2450 sband = local->hw.wiphy->bands[band];
2451
2452 if (!sband) {
2453 WARN_ON(1);
2454 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2455 }
2456
2457 bitrates = sband->bitrates;
2458 num_rates = sband->n_bitrates;
2459 supp_rates = 0;
2460 for (i = 0; i < elems->supp_rates_len +
2461 elems->ext_supp_rates_len; i++) {
2462 u8 rate = 0;
2463 int own_rate;
2464 if (i < elems->supp_rates_len)
2465 rate = elems->supp_rates[i];
2466 else if (elems->ext_supp_rates)
2467 rate = elems->ext_supp_rates
2468 [i - elems->supp_rates_len];
2469 own_rate = 5 * (rate & 0x7f);
2470 for (j = 0; j < num_rates; j++)
2471 if (bitrates[j].bitrate == own_rate)
2472 supp_rates |= BIT(j);
2473 }
2474 return supp_rates;
2475}
2476
a607268a 2477
f0706e82
JB		 2478static void ieee80211_rx_bss_info(struct net_device *dev,
2479 struct ieee80211_mgmt *mgmt,
2480 size_t len,
2481 struct ieee80211_rx_status *rx_status,
2482 int beacon)
2483{
2484 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2485 struct ieee802_11_elems elems;
2486 size_t baselen;
8318d78a 2487 int freq, clen;
f0706e82
JB		 2488 struct ieee80211_sta_bss *bss;
2489 struct sta_info *sta;
2490 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2491 u64 beacon_timestamp, rx_timestamp;
fab7d4a2 2492 struct ieee80211_channel *channel;
0795af57
JP		 2493 DECLARE_MAC_BUF(mac);
2494 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2495
2496 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2497 return; /* ignore ProbeResp to foreign address */
2498
2499#if 0
0795af57 2500 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2501 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2502 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2503#endif
2504
2505 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2506 if (baselen > len)
2507 return;
2508
9d9bf77d 2509 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
67a4cce4 2510 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2511
902acc78
JB		 2512 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2513 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2514 u64 rates = ieee80211_sta_get_rates(local, &elems,
2515 rx_status->band);
2516
2517 mesh_neighbour_update(mgmt->sa, rates, dev,
2518 mesh_peer_accepts_plinks(&elems, dev));
2519 }
f709fc69 2520
d0709a65
JB		 2521 rcu_read_lock();
2522
51fb61e7 2523 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2524 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2525 (sta = sta_info_get(local, mgmt->sa))) {
f709fc69
LCC		 2526 u64 prev_rates;
2527 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2528 rx_status->band);
f0706e82 2529
8318d78a
JB		 2530 prev_rates = sta->supp_rates[rx_status->band];
2531 sta->supp_rates[rx_status->band] &= supp_rates;
2532 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2533 /* No matching rates - this should not really happen.
2534 * Make sure that at least one rate is marked
2535 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2536 sta->supp_rates[rx_status->band] =
2537 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2538 }
8318d78a 2539 if (sta->supp_rates[rx_status->band] != prev_rates) {
f0706e82 2540 printk(KERN_DEBUG "%s: updated supp_rates set for "
8318d78a
JB		 2541 "%s based on beacon info (0x%llx & 0x%llx -> "
2542 "0x%llx)\n",
2543 dev->name, print_mac(mac, sta->addr),
2544 (unsigned long long) prev_rates,
2545 (unsigned long long) supp_rates,
2546 (unsigned long long) sta->supp_rates[rx_status->band]);
f0706e82 2547 }
f0706e82
JB		 2548 }
2549
d0709a65
JB		 2550 rcu_read_unlock();
2551
f0706e82 2552 if (elems.ds_params && elems.ds_params_len == 1)
8318d78a 2553 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
f0706e82 2554 else
8318d78a 2555 freq = rx_status->freq;
f0706e82 2556
fab7d4a2
JB		 2557 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2558
2559 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2560 return;
2561
f709fc69
LCC		 2562#ifdef CONFIG_MAC80211_MESH
2563 if (elems.mesh_config)
2564 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2565 elems.mesh_id_len, elems.mesh_config, freq);
2566 else
2567#endif
2568 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
cffdd30d 2569 elems.ssid, elems.ssid_len);
f709fc69
LCC		 2570 if (!bss) {
2571#ifdef CONFIG_MAC80211_MESH
2572 if (elems.mesh_config)
2573 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
05e5e883
LCC		 2574 elems.mesh_id_len, elems.mesh_config,
2575 elems.mesh_config_len, freq);
f709fc69
LCC		 2576 else
2577#endif
2578 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2579 elems.ssid, elems.ssid_len);
f0706e82
JB		 2580 if (!bss)
2581 return;
2582 } else {
2583#if 0
2584 /* TODO: order by RSSI? */
2585 spin_lock_bh(&local->sta_bss_lock);
2586 list_move_tail(&bss->list, &local->sta_bss_list);
2587 spin_unlock_bh(&local->sta_bss_lock);
2588#endif
2589 }
2590
5628221c
DD		 2591 /* save the ERP value so that it is available at association time */
2592 if (elems.erp_info && elems.erp_info_len >= 1) {
2593 bss->erp_value = elems.erp_info[0];
2594 bss->has_erp_value = 1;
2595 }
2596
30b89b0f
JB		 2597 if (elems.ht_cap_elem &&
2598 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2599 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2600 kfree(bss->ht_ie);
2601 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2602 if (bss->ht_ie) {
2603 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2604 elems.ht_cap_elem_len + 2);
2605 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2606 } else
2607 bss->ht_ie_len = 0;
2608 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2609 kfree(bss->ht_ie);
2610 bss->ht_ie = NULL;
2611 bss->ht_ie_len = 0;
2612 }
2613
f0706e82
JB		 2614 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2615 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2616
2617 bss->supp_rates_len = 0;
2618 if (elems.supp_rates) {
2619 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2620 if (clen > elems.supp_rates_len)
2621 clen = elems.supp_rates_len;
2622 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2623 clen);
2624 bss->supp_rates_len += clen;
2625 }
2626 if (elems.ext_supp_rates) {
2627 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2628 if (clen > elems.ext_supp_rates_len)
2629 clen = elems.ext_supp_rates_len;
2630 memcpy(&bss->supp_rates[bss->supp_rates_len],
2631 elems.ext_supp_rates, clen);
2632 bss->supp_rates_len += clen;
2633 }
2634
30b89b0f
JB		 2635 bss->band = rx_status->band;
2636
2637 bss->timestamp = beacon_timestamp;
2638 bss->last_update = jiffies;
2639 bss->rssi = rx_status->ssi;
2640 bss->signal = rx_status->signal;
2641 bss->noise = rx_status->noise;
2642 if (!beacon && !bss->probe_resp)
2643 bss->probe_resp = true;
2644
2645 /*
2646 * In STA mode, the remaining parameters should not be overridden
2647 * by beacons because they're not necessarily accurate there.
2648 */
2649 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2650 bss->probe_resp && beacon) {
2651 ieee80211_rx_bss_put(dev, bss);
2652 return;
2653 }
2654
f0706e82
JB		 2655 if (elems.wpa &&
2656 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2657 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2658 kfree(bss->wpa_ie);
2659 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2660 if (bss->wpa_ie) {
2661 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2662 bss->wpa_ie_len = elems.wpa_len + 2;
2663 } else
2664 bss->wpa_ie_len = 0;
2665 } else if (!elems.wpa && bss->wpa_ie) {
2666 kfree(bss->wpa_ie);
2667 bss->wpa_ie = NULL;
2668 bss->wpa_ie_len = 0;
2669 }
2670
2671 if (elems.rsn &&
2672 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2673 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2674 kfree(bss->rsn_ie);
2675 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2676 if (bss->rsn_ie) {
2677 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2678 bss->rsn_ie_len = elems.rsn_len + 2;
2679 } else
2680 bss->rsn_ie_len = 0;
2681 } else if (!elems.rsn && bss->rsn_ie) {
2682 kfree(bss->rsn_ie);
2683 bss->rsn_ie = NULL;
2684 bss->rsn_ie_len = 0;
2685 }
2686
30b89b0f
JB		 2687 /*
2688 * Cf.
2689 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2690 *
2691 * quoting:
2692 *
2693 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2694 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2695 * Alliance (September 1, 2004) is incorporated by reference herein.
2696 * The inclusion of the WMM Parameters in probe responses and
2697 * association responses is mandatory for WMM enabled networks. The
2698 * inclusion of the WMM Parameters in beacons, however, is optional.
2699 */
2700
f0706e82
JB		 2701 if (elems.wmm_param &&
2702 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2703 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2704 kfree(bss->wmm_ie);
2705 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2706 if (bss->wmm_ie) {
2707 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2708 elems.wmm_param_len + 2);
2709 bss->wmm_ie_len = elems.wmm_param_len + 2;
2710 } else
2711 bss->wmm_ie_len = 0;
a46f025d
AK		 2712 } else if (elems.wmm_info &&
2713 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2714 memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2715 /* As for certain AP's Fifth bit is not set in WMM IE in
2716 * beacon frames.So while parsing the beacon frame the
2717 * wmm_info structure is used instead of wmm_param.
2718 * wmm_info structure was never used to set bss->wmm_ie.
2719 * This code fixes this problem by copying the WME
2720 * information from wmm_info to bss->wmm_ie and enabling
2721 * n-band association.
2722 */
2723 kfree(bss->wmm_ie);
2724 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2725 if (bss->wmm_ie) {
2726 memcpy(bss->wmm_ie, elems.wmm_info - 2,
2727 elems.wmm_info_len + 2);
2728 bss->wmm_ie_len = elems.wmm_info_len + 2;
2729 } else
2730 bss->wmm_ie_len = 0;
2731 } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
f0706e82
JB		 2732 kfree(bss->wmm_ie);
2733 bss->wmm_ie = NULL;
2734 bss->wmm_ie_len = 0;
2735 }
9d9bf77d
BR		 2736
2737 /* check if we need to merge IBSS */
2738 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2739 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2740 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d
BR		 2741 bss->freq == local->oper_channel->center_freq &&
2742 elems.ssid_len == sdata->u.sta.ssid_len &&
2743 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2744 if (rx_status->flag & RX_FLAG_TSFT) {
2745 /* in order for correct IBSS merging we need mactime
2746 *
2747 * since mactime is defined as the time the first data
2748 * symbol of the frame hits the PHY, and the timestamp
2749 * of the beacon is defined as "the time that the data
2750 * symbol containing the first bit of the timestamp is
2751 * transmitted to the PHY plus the transmitting STA’s
2752 * delays through its local PHY from the MAC-PHY
2753 * interface to its interface with the WM"
2754 * (802.11 11.1.2) - equals the time this bit arrives at
2755 * the receiver - we have to take into account the
2756 * offset between the two.
2757 * e.g: at 1 MBit that means mactime is 192 usec earlier
2758 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2759 */
2760 int rate = local->hw.wiphy->bands[rx_status->band]->
2761 bitrates[rx_status->rate_idx].bitrate;
2762 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2763 } else if (local && local->ops && local->ops->get_tsf)
2764 /* second best option: get current TSF */
2765 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2766 else
2767 /* can't merge without knowing the TSF */
2768 rx_timestamp = -1LLU;
2769#ifdef CONFIG_MAC80211_IBSS_DEBUG
2770 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2771 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2772 print_mac(mac, mgmt->sa),
2773 print_mac(mac2, mgmt->bssid),
2774 (unsigned long long)rx_timestamp,
2775 (unsigned long long)beacon_timestamp,
2776 (unsigned long long)(rx_timestamp - beacon_timestamp),
2777 jiffies);
2778#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2779 if (beacon_timestamp > rx_timestamp) {
fba4a1e6 2780#ifndef CONFIG_MAC80211_IBSS_DEBUG
d97cf015 2781 if (net_ratelimit())
fba4a1e6 2782#endif
9d9bf77d
BR		 2783 printk(KERN_DEBUG "%s: beacon TSF higher than "
2784 "local TSF - IBSS merge with BSSID %s\n",
2785 dev->name, print_mac(mac, mgmt->bssid));
2786 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2787 ieee80211_ibss_add_sta(dev, NULL,
2788 mgmt->bssid, mgmt->sa);
2789 }
2790 }
2791
f0706e82
JB		 2792 ieee80211_rx_bss_put(dev, bss);
2793}
2794
2795
2796static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2797 struct ieee80211_mgmt *mgmt,
2798 size_t len,
2799 struct ieee80211_rx_status *rx_status)
2800{
2801 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2802}
2803
2804
2805static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2806 struct ieee80211_mgmt *mgmt,
2807 size_t len,
2808 struct ieee80211_rx_status *rx_status)
2809{
f0706e82
JB		 2810 struct ieee80211_sub_if_data *sdata;
2811 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2812 size_t baselen;
2813 struct ieee802_11_elems elems;
d3c990fb
RR		 2814 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2815 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2816 u32 changed = 0;
f0706e82
JB		 2817
2818 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2819
2820 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2821 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2822 return;
2823 ifsta = &sdata->u.sta;
2824
d6f2da5b 2825 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2826 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2827 return;
2828
2829 /* Process beacon from the current BSS */
2830 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2831 if (baselen > len)
2832 return;
2833
67a4cce4 2834 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2835
d18ef29f
RC		 2836 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2837 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2838 elems.wmm_param_len);
2839 }
2840
2841 /* Do not send changes to driver if we are scanning. This removes
2842 * requirement that driver's bss_info_changed function needs to be
2843 * atomic. */
2844 if (local->sta_sw_scanning || local->sta_hw_scanning)
2845 return;
2846
5628221c 2847 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2848 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2849 else {
2850 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2851 changed |= ieee80211_handle_protect_preamb(sdata, false,
2852 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2853 }
f0706e82 2854
d3c990fb 2855 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2856 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2857 struct ieee80211_ht_bss_info bss_info;
2858
2859 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2860 (struct ieee80211_ht_addt_info *)
2861 elems.ht_info_elem, &bss_info);
38668c05
TW		 2862 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2863 &bss_info);
d3c990fb
RR		 2864 }
2865
471b3efd 2866 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2867}
2868
2869
2870static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2871 struct ieee80211_if_sta *ifsta,
2872 struct ieee80211_mgmt *mgmt,
2873 size_t len,
2874 struct ieee80211_rx_status *rx_status)
2875{
2876 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2877 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2878 int tx_last_beacon;
2879 struct sk_buff *skb;
2880 struct ieee80211_mgmt *resp;
2881 u8 *pos, *end;
0795af57
JP		 2882 DECLARE_MAC_BUF(mac);
2883#ifdef CONFIG_MAC80211_IBSS_DEBUG
2884 DECLARE_MAC_BUF(mac2);
2885 DECLARE_MAC_BUF(mac3);
2886#endif
f0706e82 2887
51fb61e7 2888 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2889 ifsta->state != IEEE80211_IBSS_JOINED ||
2890 len < 24 + 2 || !ifsta->probe_resp)
2891 return;
2892
2893 if (local->ops->tx_last_beacon)
2894 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2895 else
2896 tx_last_beacon = 1;
2897
2898#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2899 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2900 "%s (tx_last_beacon=%d)\n",
2901 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2902 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2903#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2904
2905 if (!tx_last_beacon)
2906 return;
2907
2908 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2909 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2910 return;
2911
2912 end = ((u8 *) mgmt) + len;
2913 pos = mgmt->u.probe_req.variable;
2914 if (pos[0] != WLAN_EID_SSID ||
2915 pos + 2 + pos[1] > end) {
2916 if (net_ratelimit()) {
2917 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2918 "from %s\n",
2919 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2920 }
2921 return;
2922 }
2923 if (pos[1] != 0 &&
2924 (pos[1] != ifsta->ssid_len ||
2925 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2926 /* Ignore ProbeReq for foreign SSID */
2927 return;
2928 }
2929
2930 /* Reply with ProbeResp */
0ec0b7ac 2931 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2932 if (!skb)
2933 return;
2934
2935 resp = (struct ieee80211_mgmt *) skb->data;
2936 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2937#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2938 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2939 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2940#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2941 ieee80211_sta_tx(dev, skb, 0);
2942}
2943
4e20cb29
JB		 2944static void ieee80211_rx_mgmt_action(struct net_device *dev,
2945 struct ieee80211_if_sta *ifsta,
2946 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2947 size_t len,
2948 struct ieee80211_rx_status *rx_status)
9f985b0e 2949{
f709fc69 2950 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f709fc69 2951
9f985b0e
RR		 2952 if (len < IEEE80211_MIN_ACTION_SIZE)
2953 return;
2954
2955 switch (mgmt->u.action.category) {
2956 case WLAN_CATEGORY_BACK:
2957 switch (mgmt->u.action.u.addba_req.action_code) {
2958 case WLAN_ACTION_ADDBA_REQ:
2959 if (len < (IEEE80211_MIN_ACTION_SIZE +
2960 sizeof(mgmt->u.action.u.addba_req)))
2961 break;
2962 ieee80211_sta_process_addba_request(dev, mgmt, len);
2963 break;
eadc8d9e
RR		 2964 case WLAN_ACTION_ADDBA_RESP:
2965 if (len < (IEEE80211_MIN_ACTION_SIZE +
2966 sizeof(mgmt->u.action.u.addba_resp)))
2967 break;
2968 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2969 break;
688b88a4
RR		 2970 case WLAN_ACTION_DELBA:
2971 if (len < (IEEE80211_MIN_ACTION_SIZE +
2972 sizeof(mgmt->u.action.u.delba)))
2973 break;
2974 ieee80211_sta_process_delba(dev, mgmt, len);
2975 break;
9f985b0e
RR		 2976 default:
2977 if (net_ratelimit())
688b88a4 2978 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2979 dev->name);
2980 break;
2981 }
2982 break;
f709fc69 2983 case PLINK_CATEGORY:
902acc78 2984 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2985 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2986 break;
f709fc69 2987 case MESH_PATH_SEL_CATEGORY:
902acc78 2988 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2989 mesh_rx_path_sel_frame(dev, mgmt, len);
2990 break;
9f985b0e 2991 default:
f709fc69
LCC		 2992 if (net_ratelimit())
2993 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2994 "category=%d\n", dev->name, mgmt->u.action.category);
9f985b0e
RR		 2995 break;
2996 }
2997}
f0706e82
JB		 2998
2999void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3000 struct ieee80211_rx_status *rx_status)
3001{
3002 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3003 struct ieee80211_sub_if_data *sdata;
3004 struct ieee80211_if_sta *ifsta;
3005 struct ieee80211_mgmt *mgmt;
3006 u16 fc;
3007
3008 if (skb->len < 24)
3009 goto fail;
3010
3011 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3012 ifsta = &sdata->u.sta;
3013
3014 mgmt = (struct ieee80211_mgmt *) skb->data;
3015 fc = le16_to_cpu(mgmt->frame_control);
3016
3017 switch (fc & IEEE80211_FCTL_STYPE) {
3018 case IEEE80211_STYPE_PROBE_REQ:
3019 case IEEE80211_STYPE_PROBE_RESP:
3020 case IEEE80211_STYPE_BEACON:
f709fc69 3021 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 3022 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3023 case IEEE80211_STYPE_AUTH:
3024 case IEEE80211_STYPE_ASSOC_RESP:
3025 case IEEE80211_STYPE_REASSOC_RESP:
3026 case IEEE80211_STYPE_DEAUTH:
3027 case IEEE80211_STYPE_DISASSOC:
3028 skb_queue_tail(&ifsta->skb_queue, skb);
3029 queue_work(local->hw.workqueue, &ifsta->work);
3030 return;
3031 default:
3032 printk(KERN_DEBUG "%s: received unknown management frame - "
3033 "stype=%d\n", dev->name,
3034 (fc & IEEE80211_FCTL_STYPE) >> 4);
3035 break;
3036 }
3037
3038 fail:
3039 kfree_skb(skb);
3040}
3041
3042
3043static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3044 struct sk_buff *skb)
3045{
3046 struct ieee80211_rx_status *rx_status;
3047 struct ieee80211_sub_if_data *sdata;
3048 struct ieee80211_if_sta *ifsta;
3049 struct ieee80211_mgmt *mgmt;
3050 u16 fc;
3051
3052 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3053 ifsta = &sdata->u.sta;
3054
3055 rx_status = (struct ieee80211_rx_status *) skb->cb;
3056 mgmt = (struct ieee80211_mgmt *) skb->data;
3057 fc = le16_to_cpu(mgmt->frame_control);
3058
3059 switch (fc & IEEE80211_FCTL_STYPE) {
3060 case IEEE80211_STYPE_PROBE_REQ:
3061 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3062 rx_status);
3063 break;
3064 case IEEE80211_STYPE_PROBE_RESP:
3065 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3066 break;
3067 case IEEE80211_STYPE_BEACON:
3068 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3069 break;
3070 case IEEE80211_STYPE_AUTH:
3071 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3072 break;
3073 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 3074 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 3075 break;
3076 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 3077 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 3078 break;
3079 case IEEE80211_STYPE_DEAUTH:
3080 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3081 break;
3082 case IEEE80211_STYPE_DISASSOC:
3083 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3084 break;
9f985b0e 3085 case IEEE80211_STYPE_ACTION:
f709fc69 3086 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
9f985b0e 3087 break;
f0706e82
JB		 3088 }
3089
3090 kfree_skb(skb);
3091}
3092
3093
9ae54c84 3094ieee80211_rx_result
ece8eddd
ZY		 3095ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3096 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 3097{
3098 struct ieee80211_mgmt *mgmt;
3099 u16 fc;
3100
ece8eddd 3101 if (skb->len < 2)
e4c26add 3102 return RX_DROP_UNUSABLE;
f0706e82
JB		 3103
3104 mgmt = (struct ieee80211_mgmt *) skb->data;
3105 fc = le16_to_cpu(mgmt->frame_control);
3106
ece8eddd 3107 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
9ae54c84 3108 return RX_CONTINUE;
ece8eddd
ZY		 3109
3110 if (skb->len < 24)
e4c26add 3111 return RX_DROP_MONITOR;
ece8eddd 3112
f0706e82
JB		 3113 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3114 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3115 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3116 skb->len, rx_status);
ece8eddd 3117 dev_kfree_skb(skb);
9ae54c84 3118 return RX_QUEUED;
f0706e82
JB		 3119 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3120 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3121 rx_status);
ece8eddd 3122 dev_kfree_skb(skb);
9ae54c84 3123 return RX_QUEUED;
f0706e82
JB		 3124 }
3125 }
9ae54c84 3126 return RX_CONTINUE;
f0706e82
JB		 3127}
3128
3129
3130static int ieee80211_sta_active_ibss(struct net_device *dev)
3131{
3132 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3133 int active = 0;
3134 struct sta_info *sta;
d0709a65 3135 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3136
d0709a65
JB		 3137 rcu_read_lock();
3138
3139 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3140 if (sta->sdata == sdata &&
f0706e82
JB		 3141 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3142 jiffies)) {
3143 active++;
3144 break;
3145 }
3146 }
d0709a65
JB		 3147
3148 rcu_read_unlock();
f0706e82
JB		 3149
3150 return active;
3151}
3152
3153
f709fc69 3154static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
f0706e82
JB		 3155{
3156 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3157 struct sta_info *sta, *tmp;
be8755e1 3158 LIST_HEAD(tmp_list);
0795af57 3159 DECLARE_MAC_BUF(mac);
d0709a65 3160 unsigned long flags;
f0706e82 3161
d0709a65 3162 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3163 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3164 if (time_after(jiffies, sta->last_rx + exp_time)) {
0795af57
JP		 3165 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3166 dev->name, print_mac(mac, sta->addr));
cb585bcc 3167 __sta_info_unlink(&sta);
d0709a65
JB		 3168 if (sta)
3169 list_add(&sta->list, &tmp_list);
f0706e82 3170 }
d0709a65 3171 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3172
d0709a65
JB		 3173 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3174 sta_info_destroy(sta);
f0706e82
JB		 3175}
3176
3177
3178static void ieee80211_sta_merge_ibss(struct net_device *dev,
3179 struct ieee80211_if_sta *ifsta)
3180{
3181 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3182
f709fc69 3183 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
f0706e82
JB		 3184 if (ieee80211_sta_active_ibss(dev))
3185 return;
3186
3187 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3188 "IBSS networks with same SSID (merge)\n", dev->name);
3189 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3190}
3191
3192
f709fc69
LCC		 3193#ifdef CONFIG_MAC80211_MESH
3194static void ieee80211_mesh_housekeeping(struct net_device *dev,
3195 struct ieee80211_if_sta *ifsta)
3196{
3197 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3198 bool free_plinks;
3199
3200 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3201 mesh_path_expire(dev);
3202
3203 free_plinks = mesh_plink_availables(sdata);
3204 if (free_plinks != sdata->u.sta.accepting_plinks)
3205 ieee80211_if_config_beacon(dev);
3206
3207 mod_timer(&ifsta->timer, jiffies +
3208 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3209}
3210
3211
3212void ieee80211_start_mesh(struct net_device *dev)
3213{
3214 struct ieee80211_if_sta *ifsta;
3215 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3216 ifsta = &sdata->u.sta;
3217 ifsta->state = IEEE80211_MESH_UP;
3218 ieee80211_sta_timer((unsigned long)sdata);
3219}
3220#endif
3221
3222
f0706e82
JB		 3223void ieee80211_sta_timer(unsigned long data)
3224{
3225 struct ieee80211_sub_if_data *sdata =
3226 (struct ieee80211_sub_if_data *) data;
3227 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3228 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3229
3230 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3231 queue_work(local->hw.workqueue, &ifsta->work);
3232}
3233
f0706e82
JB		 3234void ieee80211_sta_work(struct work_struct *work)
3235{
3236 struct ieee80211_sub_if_data *sdata =
3237 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3238 struct net_device *dev = sdata->dev;
3239 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3240 struct ieee80211_if_sta *ifsta;
3241 struct sk_buff *skb;
3242
3243 if (!netif_running(dev))
3244 return;
3245
ece8eddd 3246 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3247 return;
3248
51fb61e7 3249 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
f709fc69
LCC		 3250 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3251 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
f0706e82 3252 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 3253 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 3254 return;
3255 }
3256 ifsta = &sdata->u.sta;
3257
3258 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3259 ieee80211_sta_rx_queued_mgmt(dev, skb);
3260
f709fc69 3261#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3262 if (ifsta->preq_queue_len &&
3263 time_after(jiffies,
3264 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f709fc69
LCC		 3265 mesh_path_start_discovery(dev);
3266#endif
3267
f0706e82
JB		 3268 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3269 ifsta->state != IEEE80211_ASSOCIATE &&
3270 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 3271 if (ifsta->scan_ssid_len)
3272 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3273 else
3274 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 3275 return;
3276 }
3277
3278 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3279 if (ieee80211_sta_config_auth(dev, ifsta))
3280 return;
3281 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3282 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3283 return;
3284
3285 switch (ifsta->state) {
3286 case IEEE80211_DISABLED:
3287 break;
3288 case IEEE80211_AUTHENTICATE:
3289 ieee80211_authenticate(dev, ifsta);
3290 break;
3291 case IEEE80211_ASSOCIATE:
3292 ieee80211_associate(dev, ifsta);
3293 break;
3294 case IEEE80211_ASSOCIATED:
3295 ieee80211_associated(dev, ifsta);
3296 break;
3297 case IEEE80211_IBSS_SEARCH:
3298 ieee80211_sta_find_ibss(dev, ifsta);
3299 break;
3300 case IEEE80211_IBSS_JOINED:
3301 ieee80211_sta_merge_ibss(dev, ifsta);
3302 break;
f709fc69
LCC		 3303#ifdef CONFIG_MAC80211_MESH
3304 case IEEE80211_MESH_UP:
3305 ieee80211_mesh_housekeeping(dev, ifsta);
3306 break;
3307#endif
f0706e82
JB		 3308 default:
3309 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3310 ifsta->state);
3311 break;
3312 }
3313
3314 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3315 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3316 "mixed-cell disabled - disassociate\n", dev->name);
3317
3318 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3319 ieee80211_set_disassoc(dev, ifsta, 0);
3320 }
3321}
3322
3323
3324static void ieee80211_sta_reset_auth(struct net_device *dev,
3325 struct ieee80211_if_sta *ifsta)
3326{
3327 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3328
3329 if (local->ops->reset_tsf) {
3330 /* Reset own TSF to allow time synchronization work. */
3331 local->ops->reset_tsf(local_to_hw(local));
3332 }
3333
3334 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3335
3336
3337 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3338 ifsta->auth_alg = WLAN_AUTH_OPEN;
3339 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3340 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3341 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3342 ifsta->auth_alg = WLAN_AUTH_LEAP;
3343 else
3344 ifsta->auth_alg = WLAN_AUTH_OPEN;
3345 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3346 ifsta->auth_alg);
3347 ifsta->auth_transaction = -1;
d6f2da5b
JS		 3348 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3349 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 3350 netif_carrier_off(dev);
3351}
3352
3353
3354void ieee80211_sta_req_auth(struct net_device *dev,
3355 struct ieee80211_if_sta *ifsta)
3356{
3357 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3358 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3359
51fb61e7 3360 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3361 return;
3362
d6f2da5b
JS		 3363 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3364 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3365 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3366 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3367 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3368 queue_work(local->hw.workqueue, &ifsta->work);
3369 }
3370}
3371
3372static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3373 const char *ssid, int ssid_len)
3374{
3375 int tmp, hidden_ssid;
3376
48225709
MW		 3377 if (ssid_len == ifsta->ssid_len &&
3378 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3379 return 1;
3380
d6f2da5b 3381 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3382 return 0;
3383
3384 hidden_ssid = 1;
3385 tmp = ssid_len;
3386 while (tmp--) {
3387 if (ssid[tmp] != '\0') {
3388 hidden_ssid = 0;
3389 break;
3390 }
3391 }
3392
3393 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3394 return 1;
3395
3396 if (ssid_len == 1 && ssid[0] == ' ')
3397 return 1;
3398
3399 return 0;
3400}
3401
3402static int ieee80211_sta_config_auth(struct net_device *dev,
3403 struct ieee80211_if_sta *ifsta)
3404{
3405 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3406 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3407 struct ieee80211_sta_bss *bss, *selected = NULL;
3408 int top_rssi = 0, freq;
3409
d6f2da5b
JS		 3410 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3411 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 3412 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3413 ieee80211_sta_reset_auth(dev, ifsta);
3414 return 0;
3415 }
3416
3417 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3418 freq = local->oper_channel->center_freq;
f0706e82
JB		 3419 list_for_each_entry(bss, &local->sta_bss_list, list) {
3420 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3421 continue;
3422
3423 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3424 !!sdata->default_key)
3425 continue;
3426
d6f2da5b
JS		 3427 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3428 bss->freq != freq)
f0706e82
JB		 3429 continue;
3430
d6f2da5b 3431 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3432 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3433 continue;
3434
d6f2da5b 3435 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3436 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3437 continue;
3438
3439 if (!selected || top_rssi < bss->rssi) {
3440 selected = bss;
3441 top_rssi = bss->rssi;
3442 }
3443 }
3444 if (selected)
3445 atomic_inc(&selected->users);
3446 spin_unlock_bh(&local->sta_bss_lock);
3447
3448 if (selected) {
8318d78a 3449 ieee80211_set_freq(local, selected->freq);
d6f2da5b 3450 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3451 ieee80211_sta_set_ssid(dev, selected->ssid,
3452 selected->ssid_len);
3453 ieee80211_sta_set_bssid(dev, selected->bssid);
e2839d8f 3454 ieee80211_sta_def_wmm_params(dev, selected, 0);
f0706e82
JB		 3455 ieee80211_rx_bss_put(dev, selected);
3456 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3457 ieee80211_sta_reset_auth(dev, ifsta);
3458 return 0;
3459 } else {
3460 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3461 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3462 ieee80211_sta_start_scan(dev, NULL, 0);
3463 else
3464 ieee80211_sta_start_scan(dev, ifsta->ssid,
3465 ifsta->ssid_len);
f0706e82
JB		 3466 ifsta->state = IEEE80211_AUTHENTICATE;
3467 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3468 } else
3469 ifsta->state = IEEE80211_DISABLED;
3470 }
f0706e82
JB		 3471 return -1;
3472}
3473
f0706e82
JB		 3474
3475static int ieee80211_sta_create_ibss(struct net_device *dev,
3476 struct ieee80211_if_sta *ifsta)
3477{
3478 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3479 struct ieee80211_sta_bss *bss;
cffdd30d 3480 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3481 struct ieee80211_supported_band *sband;
f0706e82
JB		 3482 u8 bssid[ETH_ALEN], *pos;
3483 int i;
0795af57 3484 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3485
3486#if 0
3487 /* Easier testing, use fixed BSSID. */
3488 memset(bssid, 0xfe, ETH_ALEN);
3489#else
3490 /* Generate random, not broadcast, locally administered BSSID. Mix in
3491 * own MAC address to make sure that devices that do not have proper
3492 * random number generator get different BSSID. */
3493 get_random_bytes(bssid, ETH_ALEN);
3494 for (i = 0; i < ETH_ALEN; i++)
3495 bssid[i] ^= dev->dev_addr[i];
3496 bssid[0] &= ~0x01;
3497 bssid[0] |= 0x02;
3498#endif
3499
0795af57
JP		 3500 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3501 dev->name, print_mac(mac, bssid));
f0706e82 3502
8318d78a
JB		 3503 bss = ieee80211_rx_bss_add(dev, bssid,
3504 local->hw.conf.channel->center_freq,
cffdd30d 3505 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3506 if (!bss)
3507 return -ENOMEM;
3508
8318d78a
JB		 3509 bss->band = local->hw.conf.channel->band;
3510 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3511
3512 if (local->hw.conf.beacon_int == 0)
f709fc69 3513 local->hw.conf.beacon_int = 10000;
f0706e82 3514 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3515 bss->last_update = jiffies;
3516 bss->capability = WLAN_CAPABILITY_IBSS;
3517 if (sdata->default_key) {
3518 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3519 } else
3520 sdata->drop_unencrypted = 0;
8318d78a 3521 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3522 pos = bss->supp_rates;
8318d78a
JB		 3523 for (i = 0; i < sband->n_bitrates; i++) {
3524 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3525 *pos++ = (u8) (rate / 5);
3526 }
3527
3528 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3529}
3530
3531
3532static int ieee80211_sta_find_ibss(struct net_device *dev,
3533 struct ieee80211_if_sta *ifsta)
3534{
3535 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3536 struct ieee80211_sta_bss *bss;
3537 int found = 0;
3538 u8 bssid[ETH_ALEN];
3539 int active_ibss;
0795af57
JP		 3540 DECLARE_MAC_BUF(mac);
3541 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3542
3543 if (ifsta->ssid_len == 0)
3544 return -EINVAL;
3545
3546 active_ibss = ieee80211_sta_active_ibss(dev);
3547#ifdef CONFIG_MAC80211_IBSS_DEBUG
3548 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3549 dev->name, active_ibss);
3550#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3551 spin_lock_bh(&local->sta_bss_lock);
3552 list_for_each_entry(bss, &local->sta_bss_list, list) {
3553 if (ifsta->ssid_len != bss->ssid_len ||
3554 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3555 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3556 continue;
3557#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3558 printk(KERN_DEBUG " bssid=%s found\n",
3559 print_mac(mac, bss->bssid));
f0706e82
JB		 3560#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3561 memcpy(bssid, bss->bssid, ETH_ALEN);
3562 found = 1;
3563 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3564 break;
3565 }
3566 spin_unlock_bh(&local->sta_bss_lock);
3567
3568#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3569 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3570 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3571#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3572 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3573 (bss = ieee80211_rx_bss_get(dev, bssid,
3574 local->hw.conf.channel->center_freq,
cffdd30d 3575 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3576 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3577 " based on configured SSID\n",
0795af57 3578 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3579 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3580 }
3581#ifdef CONFIG_MAC80211_IBSS_DEBUG
3582 printk(KERN_DEBUG " did not try to join ibss\n");
3583#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3584
3585 /* Selected IBSS not found in current scan results - try to scan */
3586 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3587 !ieee80211_sta_active_ibss(dev)) {
3588 mod_timer(&ifsta->timer, jiffies +
3589 IEEE80211_IBSS_MERGE_INTERVAL);
3590 } else if (time_after(jiffies, local->last_scan_completed +
3591 IEEE80211_SCAN_INTERVAL)) {
3592 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3593 "join\n", dev->name);
3594 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3595 ifsta->ssid_len);
3596 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3597 int interval = IEEE80211_SCAN_INTERVAL;
3598
3599 if (time_after(jiffies, ifsta->ibss_join_req +
3600 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3601 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3602 (!(local->oper_channel->flags &
3603 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3604 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3605 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3606 printk(KERN_DEBUG "%s: IBSS not allowed on"
3607 " %d MHz\n", dev->name,
3608 local->hw.conf.channel->center_freq);
f0706e82
JB		 3609 }
3610
3611 /* No IBSS found - decrease scan interval and continue
3612 * scanning. */
3613 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3614 }
3615
3616 ifsta->state = IEEE80211_IBSS_SEARCH;
3617 mod_timer(&ifsta->timer, jiffies + interval);
3618 return 0;
3619 }
3620
3621 return 0;
3622}
3623
3624
3625int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3626{
8318d78a 3627 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3628 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 3629
3630 if (len > IEEE80211_MAX_SSID_LEN)
3631 return -EINVAL;
3632
f0706e82
JB		 3633 ifsta = &sdata->u.sta;
3634
3635 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3636 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3637 memcpy(ifsta->ssid, ssid, len);
3638 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3639 ifsta->ssid_len = len;
3640
d6f2da5b
JS		 3641 if (len)
3642 ifsta->flags |= IEEE80211_STA_SSID_SET;
3643 else
3644 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3645 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3646 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3647 ifsta->ibss_join_req = jiffies;
3648 ifsta->state = IEEE80211_IBSS_SEARCH;
3649 return ieee80211_sta_find_ibss(dev, ifsta);
3650 }
3651 return 0;
3652}
3653
3654
3655int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3656{
3657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3658 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3659 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3660 *len = ifsta->ssid_len;
3661 return 0;
3662}
3663
3664
3665int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3666{
3667 struct ieee80211_sub_if_data *sdata;
3668 struct ieee80211_if_sta *ifsta;
3669 int res;
3670
3671 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3672 ifsta = &sdata->u.sta;
3673
3674 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3675 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3676 res = ieee80211_if_config(dev);
3677 if (res) {
3678 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3679 "the low-level driver\n", dev->name);
3680 return res;
3681 }
3682 }
3683
d6f2da5b
JS		 3684 if (is_valid_ether_addr(bssid))
3685 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3686 else
d6f2da5b
JS		 3687 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3688
f0706e82
JB		 3689 return 0;
3690}
3691
3692
3693static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3694 struct ieee80211_sub_if_data *sdata,
3695 int powersave)
3696{
3697 struct sk_buff *skb;
3698 struct ieee80211_hdr *nullfunc;
3699 u16 fc;
3700
3701 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3702 if (!skb) {
3703 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3704 "frame\n", sdata->dev->name);
3705 return;
3706 }
3707 skb_reserve(skb, local->hw.extra_tx_headroom);
3708
3709 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3710 memset(nullfunc, 0, 24);
3711 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3712 IEEE80211_FCTL_TODS;
3713 if (powersave)
3714 fc |= IEEE80211_FCTL_PM;
3715 nullfunc->frame_control = cpu_to_le16(fc);
3716 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3717 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3718 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3719
3720 ieee80211_sta_tx(sdata->dev, skb, 0);
3721}
3722
3723
69d3b6f4
JB		 3724static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3725{
3726 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3727 ieee80211_vif_is_mesh(&sdata->vif))
3728 ieee80211_sta_timer((unsigned long)sdata);
3729}
3730
f0706e82
JB		 3731void ieee80211_scan_completed(struct ieee80211_hw *hw)
3732{
3733 struct ieee80211_local *local = hw_to_local(hw);
3734 struct net_device *dev = local->scan_dev;
3735 struct ieee80211_sub_if_data *sdata;
3736 union iwreq_data wrqu;
3737
3738 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3739 memset(&wrqu, 0, sizeof(wrqu));
3740 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3741
ece8eddd
ZY		 3742 if (local->sta_hw_scanning) {
3743 local->sta_hw_scanning = 0;
675ef586
MA		 3744 if (ieee80211_hw_config(local))
3745 printk(KERN_DEBUG "%s: failed to restore operational "
3746 "channel after scan\n", dev->name);
69d3b6f4
JB		 3747 /* Restart STA timer for HW scan case */
3748 rcu_read_lock();
3749 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3750 ieee80211_restart_sta_timer(sdata);
3751 rcu_read_unlock();
3752
ece8eddd
ZY		 3753 goto done;
3754 }
3755
3756 local->sta_sw_scanning = 0;
f0706e82 3757 if (ieee80211_hw_config(local))
4b50e388 3758 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3759 "channel after scan\n", dev->name);
3760
4150c572
JB		 3761
3762 netif_tx_lock_bh(local->mdev);
3763 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3764 local->ops->configure_filter(local_to_hw(local),
3765 FIF_BCN_PRBRESP_PROMISC,
3766 &local->filter_flags,
3767 local->mdev->mc_count,
3768 local->mdev->mc_list);
3769
3770 netif_tx_unlock_bh(local->mdev);
f0706e82 3771
79010420
JB		 3772 rcu_read_lock();
3773 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3774
3775 /* No need to wake the master device. */
3776 if (sdata->dev == local->mdev)
3777 continue;
3778
69d3b6f4
JB		 3779 /* Tell AP we're back */
3780 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3781 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3782 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3783
69d3b6f4 3784 ieee80211_restart_sta_timer(sdata);
f709fc69 3785
f0706e82
JB		 3786 netif_wake_queue(sdata->dev);
3787 }
79010420 3788 rcu_read_unlock();
f0706e82 3789
ece8eddd 3790done:
f0706e82 3791 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3792 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3793 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3794 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3795 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3796 !ieee80211_sta_active_ibss(dev)))
3797 ieee80211_sta_find_ibss(dev, ifsta);
3798 }
3799}
3800EXPORT_SYMBOL(ieee80211_scan_completed);
3801
3802void ieee80211_sta_scan_work(struct work_struct *work)
3803{
3804 struct ieee80211_local *local =
3805 container_of(work, struct ieee80211_local, scan_work.work);
3806 struct net_device *dev = local->scan_dev;
3807 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3808 struct ieee80211_supported_band *sband;
f0706e82
JB		 3809 struct ieee80211_channel *chan;
3810 int skip;
3811 unsigned long next_delay = 0;
3812
ece8eddd 3813 if (!local->sta_sw_scanning)
f0706e82
JB		 3814 return;
3815
3816 switch (local->scan_state) {
3817 case SCAN_SET_CHANNEL:
69d464d5
JB		 3818 /*
3819 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3820 * after we successfully scanned the last channel of the last
3821 * band (and the last band is supported by the hw)
3822 */
8318d78a
JB		 3823 if (local->scan_band < IEEE80211_NUM_BANDS)
3824 sband = local->hw.wiphy->bands[local->scan_band];
3825 else
3826 sband = NULL;
3827
69d464d5
JB		 3828 /*
3829 * If we are at an unsupported band and have more bands
3830 * left to scan, advance to the next supported one.
3831 */
3832 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3833 local->scan_band++;
3834 sband = local->hw.wiphy->bands[local->scan_band];
3835 local->scan_channel_idx = 0;
3836 }
3837
69d464d5
JB		 3838 /* if no more bands/channels left, complete scan */
3839 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3840 ieee80211_scan_completed(local_to_hw(local));
3841 return;
3842 }
8318d78a
JB		 3843 skip = 0;
3844 chan = &sband->channels[local->scan_channel_idx];
3845
3846 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3847 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3848 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3849 skip = 1;
3850
3851 if (!skip) {
f0706e82
JB		 3852 local->scan_channel = chan;
3853 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3854 printk(KERN_DEBUG "%s: failed to set freq to "
3855 "%d MHz for scan\n", dev->name,
3856 chan->center_freq);
f0706e82
JB		 3857 skip = 1;
3858 }
3859 }
3860
69d464d5 3861 /* advance state machine to next channel/band */
f0706e82 3862 local->scan_channel_idx++;
8318d78a 3863 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3864 /*
3865 * scan_band may end up == IEEE80211_NUM_BANDS, but
3866 * we'll catch that case above and complete the scan
3867 * if that is the case.
3868 */
8318d78a
JB		 3869 local->scan_band++;
3870 local->scan_channel_idx = 0;
f0706e82
JB		 3871 }
3872
3873 if (skip)
3874 break;
3875
3876 next_delay = IEEE80211_PROBE_DELAY +
3877 usecs_to_jiffies(local->hw.channel_change_time);
3878 local->scan_state = SCAN_SEND_PROBE;
3879 break;
3880 case SCAN_SEND_PROBE:
8318d78a 3881 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3882 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3883
3884 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3885 break;
3886 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3887 local->scan_ssid_len);
3888 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3889 break;
3890 }
3891
ece8eddd 3892 if (local->sta_sw_scanning)
f0706e82
JB		 3893 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3894 next_delay);
3895}
3896
3897
3898static int ieee80211_sta_start_scan(struct net_device *dev,
3899 u8 *ssid, size_t ssid_len)
3900{
3901 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3902 struct ieee80211_sub_if_data *sdata;
3903
3904 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3905 return -EINVAL;
3906
3907 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3908 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3909 * BSSID: MACAddress
3910 * SSID
3911 * ScanType: ACTIVE, PASSIVE
3912 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3913 * a Probe frame during active scanning
3914 * ChannelList
3915 * MinChannelTime (>= ProbeDelay), in TU
3916 * MaxChannelTime: (>= MinChannelTime), in TU
3917 */
3918
3919 /* MLME-SCAN.confirm
3920 * BSSDescriptionSet
3921 * ResultCode: SUCCESS, INVALID_PARAMETERS
3922 */
3923
ece8eddd 3924 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3925 if (local->scan_dev == dev)
3926 return 0;
3927 return -EBUSY;
3928 }
3929
3930 if (local->ops->hw_scan) {
3931 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3932 ssid, ssid_len);
f0706e82 3933 if (!rc) {
ece8eddd 3934 local->sta_hw_scanning = 1;
f0706e82
JB		 3935 local->scan_dev = dev;
3936 }
3937 return rc;
3938 }
3939
ece8eddd 3940 local->sta_sw_scanning = 1;
f0706e82 3941
79010420
JB		 3942 rcu_read_lock();
3943 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3944
3945 /* Don't stop the master interface, otherwise we can't transmit
3946 * probes! */
3947 if (sdata->dev == local->mdev)
3948 continue;
3949
f0706e82 3950 netif_stop_queue(sdata->dev);
51fb61e7 3951 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3952 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3953 ieee80211_send_nullfunc(local, sdata, 1);
3954 }
79010420 3955 rcu_read_unlock();
f0706e82
JB		 3956
3957 if (ssid) {
3958 local->scan_ssid_len = ssid_len;
3959 memcpy(local->scan_ssid, ssid, ssid_len);
3960 } else
3961 local->scan_ssid_len = 0;
3962 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3963 local->scan_channel_idx = 0;
8318d78a 3964 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 3965 local->scan_dev = dev;
3966
4150c572
JB		 3967 netif_tx_lock_bh(local->mdev);
3968 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3969 local->ops->configure_filter(local_to_hw(local),
3970 FIF_BCN_PRBRESP_PROMISC,
3971 &local->filter_flags,
3972 local->mdev->mc_count,
3973 local->mdev->mc_list);
3974 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3975
3976 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3977 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3978 IEEE80211_CHANNEL_TIME);
3979
3980 return 0;
3981}
3982
3983
3984int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3985{
3986 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3987 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3988 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3989
51fb61e7 3990 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3991 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3992
ece8eddd 3993 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3994 if (local->scan_dev == dev)
3995 return 0;
3996 return -EBUSY;
3997 }
3998
a0af5f14
HS		 3999 ifsta->scan_ssid_len = ssid_len;
4000 if (ssid_len)
4001 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 4002 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4003 queue_work(local->hw.workqueue, &ifsta->work);
4004 return 0;
4005}
4006
4007static char *
4008ieee80211_sta_scan_result(struct net_device *dev,
4009 struct ieee80211_sta_bss *bss,
4010 char *current_ev, char *end_buf)
4011{
4012 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4013 struct iw_event iwe;
4014
4015 if (time_after(jiffies,
4016 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4017 return current_ev;
4018
f0706e82
JB		 4019 memset(&iwe, 0, sizeof(iwe));
4020 iwe.cmd = SIOCGIWAP;
4021 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4022 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4023 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4024 IW_EV_ADDR_LEN);
4025
4026 memset(&iwe, 0, sizeof(iwe));
4027 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 4028 if (bss_mesh_cfg(bss)) {
4029 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69
LCC		 4030 iwe.u.data.flags = 1;
4031 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
902acc78 4032 bss_mesh_id(bss));
f709fc69
LCC		 4033 } else {
4034 iwe.u.data.length = bss->ssid_len;
4035 iwe.u.data.flags = 1;
4036 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4037 bss->ssid);
4038 }
f0706e82 4039
1d1b5359
LCC		 4040 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4041 || bss_mesh_cfg(bss)) {
f0706e82
JB		 4042 memset(&iwe, 0, sizeof(iwe));
4043 iwe.cmd = SIOCGIWMODE;
902acc78 4044 if (bss_mesh_cfg(bss))
f709fc69
LCC		 4045 iwe.u.mode = IW_MODE_MESH;
4046 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 4047 iwe.u.mode = IW_MODE_MASTER;
4048 else
4049 iwe.u.mode = IW_MODE_ADHOC;
4050 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4051 IW_EV_UINT_LEN);
4052 }
4053
4054 memset(&iwe, 0, sizeof(iwe));
4055 iwe.cmd = SIOCGIWFREQ;
8318d78a
JB		 4056 iwe.u.freq.m = bss->freq;
4057 iwe.u.freq.e = 6;
f0706e82
JB		 4058 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4059 IW_EV_FREQ_LEN);
8318d78a
JB		 4060
4061 memset(&iwe, 0, sizeof(iwe));
4062 iwe.cmd = SIOCGIWFREQ;
4063 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4064 iwe.u.freq.e = 0;
f0706e82
JB		 4065 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4066 IW_EV_FREQ_LEN);
4067
4068 memset(&iwe, 0, sizeof(iwe));
4069 iwe.cmd = IWEVQUAL;
4070 iwe.u.qual.qual = bss->signal;
4071 iwe.u.qual.level = bss->rssi;
4072 iwe.u.qual.noise = bss->noise;
4073 iwe.u.qual.updated = local->wstats_flags;
4074 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4075 IW_EV_QUAL_LEN);
4076
4077 memset(&iwe, 0, sizeof(iwe));
4078 iwe.cmd = SIOCGIWENCODE;
4079 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4080 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4081 else
4082 iwe.u.data.flags = IW_ENCODE_DISABLED;
4083 iwe.u.data.length = 0;
4084 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4085
4086 if (bss && bss->wpa_ie) {
4087 memset(&iwe, 0, sizeof(iwe));
4088 iwe.cmd = IWEVGENIE;
4089 iwe.u.data.length = bss->wpa_ie_len;
4090 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4091 bss->wpa_ie);
4092 }
4093
4094 if (bss && bss->rsn_ie) {
4095 memset(&iwe, 0, sizeof(iwe));
4096 iwe.cmd = IWEVGENIE;
4097 iwe.u.data.length = bss->rsn_ie_len;
4098 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4099 bss->rsn_ie);
4100 }
4101
4102 if (bss && bss->supp_rates_len > 0) {
4103 /* display all supported rates in readable format */
4104 char *p = current_ev + IW_EV_LCP_LEN;
4105 int i;
4106
4107 memset(&iwe, 0, sizeof(iwe));
4108 iwe.cmd = SIOCGIWRATE;
4109 /* Those two flags are ignored... */
4110 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4111
4112 for (i = 0; i < bss->supp_rates_len; i++) {
4113 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4114 0x7f) * 500000);
4115 p = iwe_stream_add_value(current_ev, p,
4116 end_buf, &iwe, IW_EV_PARAM_LEN);
4117 }
4118 current_ev = p;
4119 }
4120
4121 if (bss) {
4122 char *buf;
4123 buf = kmalloc(30, GFP_ATOMIC);
4124 if (buf) {
4125 memset(&iwe, 0, sizeof(iwe));
4126 iwe.cmd = IWEVCUSTOM;
4127 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4128 iwe.u.data.length = strlen(buf);
4129 current_ev = iwe_stream_add_point(current_ev, end_buf,
4130 &iwe, buf);
4131 kfree(buf);
4132 }
4133 }
4134
902acc78 4135 if (bss_mesh_cfg(bss)) {
f709fc69 4136 char *buf;
24736701 4137 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 4138 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 4139 if (buf) {
4140 memset(&iwe, 0, sizeof(iwe));
4141 iwe.cmd = IWEVCUSTOM;
24736701 4142 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4f5d4c4d
LCC		 4143 iwe.u.data.length = strlen(buf);
4144 current_ev = iwe_stream_add_point(current_ev, end_buf,
4145 &iwe, buf);
4146 sprintf(buf, "Path Selection Protocol ID: "
24736701
JL		 4147 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4148 cfg[4]);
4f5d4c4d
LCC		 4149 iwe.u.data.length = strlen(buf);
4150 current_ev = iwe_stream_add_point(current_ev, end_buf,
4151 &iwe, buf);
4152 sprintf(buf, "Path Selection Metric ID: "
24736701
JL		 4153 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4154 cfg[8]);
4f5d4c4d
LCC		 4155 iwe.u.data.length = strlen(buf);
4156 current_ev = iwe_stream_add_point(current_ev, end_buf,
4157 &iwe, buf);
4158 sprintf(buf, "Congestion Control Mode ID: "
24736701
JL		 4159 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4160 cfg[11], cfg[12]);
4f5d4c4d
LCC		 4161 iwe.u.data.length = strlen(buf);
4162 current_ev = iwe_stream_add_point(current_ev, end_buf,
4163 &iwe, buf);
4164 sprintf(buf, "Channel Precedence: "
24736701
JL		 4165 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4166 cfg[15], cfg[16]);
f709fc69
LCC		 4167 iwe.u.data.length = strlen(buf);
4168 current_ev = iwe_stream_add_point(current_ev, end_buf,
4169 &iwe, buf);
4170 kfree(buf);
4171 }
4172 }
4173
f0706e82
JB		 4174 return current_ev;
4175}
4176
4177
4178int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4179{
4180 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4181 char *current_ev = buf;
4182 char *end_buf = buf + len;
4183 struct ieee80211_sta_bss *bss;
4184
4185 spin_lock_bh(&local->sta_bss_lock);
4186 list_for_each_entry(bss, &local->sta_bss_list, list) {
4187 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4188 spin_unlock_bh(&local->sta_bss_lock);
4189 return -E2BIG;
4190 }
4191 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4192 end_buf);
4193 }
4194 spin_unlock_bh(&local->sta_bss_lock);
4195 return current_ev - buf;
4196}
4197
4198
4199int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4200{
4201 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4202 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4203 kfree(ifsta->extra_ie);
4204 if (len == 0) {
4205 ifsta->extra_ie = NULL;
4206 ifsta->extra_ie_len = 0;
4207 return 0;
4208 }
4209 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4210 if (!ifsta->extra_ie) {
4211 ifsta->extra_ie_len = 0;
4212 return -ENOMEM;
4213 }
4214 memcpy(ifsta->extra_ie, ie, len);
4215 ifsta->extra_ie_len = len;
4216 return 0;
4217}
4218
4219
4220struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4221 struct sk_buff *skb, u8 *bssid,
4222 u8 *addr)
4223{
4224 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4225 struct sta_info *sta;
91fa558b 4226 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 4227 DECLARE_MAC_BUF(mac);
f0706e82
JB		 4228
4229 /* TODO: Could consider removing the least recently used entry and
4230 * allow new one to be added. */
4231 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4232 if (net_ratelimit()) {
4233 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 4234 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 4235 }
4236 return NULL;
4237 }
4238
0795af57 4239 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 4240 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82 4241
73651ee6
JB		 4242 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4243 if (!sta)
f0706e82
JB		 4244 return NULL;
4245
238814fd
JB		 4246 sta->flags |= WLAN_STA_AUTHORIZED;
4247
8318d78a
JB		 4248 sta->supp_rates[local->hw.conf.channel->band] =
4249 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
f0706e82
JB		 4250
4251 rate_control_rate_init(sta, local);
4252
93e5deb1 4253 if (sta_info_insert(sta))
73651ee6 4254 return NULL;
73651ee6 4255
d0709a65 4256 return sta;
f0706e82
JB		 4257}
4258
4259
4260int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4261{
4262 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4263 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4264
4265 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4266 dev->name, reason);
4267
51fb61e7
JB		 4268 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4269 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4270 return -EINVAL;
4271
4272 ieee80211_send_deauth(dev, ifsta, reason);
4273 ieee80211_set_disassoc(dev, ifsta, 1);
4274 return 0;
4275}
4276
4277
4278int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4279{
4280 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4281 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4282
4283 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4284 dev->name, reason);
4285
51fb61e7 4286 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4287 return -EINVAL;
4288
d6f2da5b 4289 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4290 return -1;
4291
4292 ieee80211_send_disassoc(dev, ifsta, reason);
4293 ieee80211_set_disassoc(dev, ifsta, 0);
4294 return 0;
4295}
84363e6e
MA		 4296
4297void ieee80211_notify_mac(struct ieee80211_hw *hw,
4298 enum ieee80211_notification_types notif_type)
4299{
4300 struct ieee80211_local *local = hw_to_local(hw);
4301 struct ieee80211_sub_if_data *sdata;
4302
4303 switch (notif_type) {
4304 case IEEE80211_NOTIFY_RE_ASSOC:
4305 rcu_read_lock();
4306 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4307
4308 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4309 ieee80211_sta_req_auth(sdata->dev,
4310 &sdata->u.sta);
4311 }
4312
4313 }
4314 rcu_read_unlock();
4315 break;
4316 }
4317}
4318EXPORT_SYMBOL(ieee80211_notify_mac);
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