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mac80211: add association capabilty and timing info into bss_conf
[deliverable/linux.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
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"
33#include "ieee80211_rate.h"
47f0c502 34#include "ieee80211_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
60#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
61
62#define ERP_INFO_USE_PROTECTION BIT(1)
63
9f985b0e
RR		 64/* mgmt header + 1 byte action code */
65#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
66
67#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
68#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
69#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 70#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
71#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 72
07db2183
RR		 73/* next values represent the buffer size for A-MPDU frame.
74 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
75#define IEEE80211_MIN_AMPDU_BUF 0x8
76#define IEEE80211_MAX_AMPDU_BUF 0x40
77
f0706e82
JB		 78static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
79 u8 *ssid, size_t ssid_len);
80static struct ieee80211_sta_bss *
8318d78a 81ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 82 u8 *ssid, u8 ssid_len);
f0706e82
JB		 83static void ieee80211_rx_bss_put(struct net_device *dev,
84 struct ieee80211_sta_bss *bss);
85static int ieee80211_sta_find_ibss(struct net_device *dev,
86 struct ieee80211_if_sta *ifsta);
87static int ieee80211_sta_wep_configured(struct net_device *dev);
88static int ieee80211_sta_start_scan(struct net_device *dev,
89 u8 *ssid, size_t ssid_len);
90static int ieee80211_sta_config_auth(struct net_device *dev,
91 struct ieee80211_if_sta *ifsta);
92
93
ee385855
LCC		 94void ieee802_11_parse_elems(u8 *start, size_t len,
95 struct ieee802_11_elems *elems)
f0706e82
JB		 96{
97 size_t left = len;
98 u8 *pos = start;
f0706e82
JB		 99
100 memset(elems, 0, sizeof(*elems));
101
102 while (left >= 2) {
103 u8 id, elen;
104
105 id = *pos++;
106 elen = *pos++;
107 left -= 2;
108
67a4cce4
JL		 109 if (elen > left)
110 return;
f0706e82
JB		 111
112 switch (id) {
113 case WLAN_EID_SSID:
114 elems->ssid = pos;
115 elems->ssid_len = elen;
116 break;
117 case WLAN_EID_SUPP_RATES:
118 elems->supp_rates = pos;
119 elems->supp_rates_len = elen;
120 break;
121 case WLAN_EID_FH_PARAMS:
122 elems->fh_params = pos;
123 elems->fh_params_len = elen;
124 break;
125 case WLAN_EID_DS_PARAMS:
126 elems->ds_params = pos;
127 elems->ds_params_len = elen;
128 break;
129 case WLAN_EID_CF_PARAMS:
130 elems->cf_params = pos;
131 elems->cf_params_len = elen;
132 break;
133 case WLAN_EID_TIM:
134 elems->tim = pos;
135 elems->tim_len = elen;
136 break;
137 case WLAN_EID_IBSS_PARAMS:
138 elems->ibss_params = pos;
139 elems->ibss_params_len = elen;
140 break;
141 case WLAN_EID_CHALLENGE:
142 elems->challenge = pos;
143 elems->challenge_len = elen;
144 break;
145 case WLAN_EID_WPA:
146 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
147 pos[2] == 0xf2) {
148 /* Microsoft OUI (00:50:F2) */
149 if (pos[3] == 1) {
150 /* OUI Type 1 - WPA IE */
151 elems->wpa = pos;
152 elems->wpa_len = elen;
153 } else if (elen >= 5 && pos[3] == 2) {
154 if (pos[4] == 0) {
155 elems->wmm_info = pos;
156 elems->wmm_info_len = elen;
157 } else if (pos[4] == 1) {
158 elems->wmm_param = pos;
159 elems->wmm_param_len = elen;
160 }
161 }
162 }
163 break;
164 case WLAN_EID_RSN:
165 elems->rsn = pos;
166 elems->rsn_len = elen;
167 break;
168 case WLAN_EID_ERP_INFO:
169 elems->erp_info = pos;
170 elems->erp_info_len = elen;
171 break;
172 case WLAN_EID_EXT_SUPP_RATES:
173 elems->ext_supp_rates = pos;
174 elems->ext_supp_rates_len = elen;
175 break;
c7153508
RR		 176 case WLAN_EID_HT_CAPABILITY:
177 elems->ht_cap_elem = pos;
178 elems->ht_cap_elem_len = elen;
179 break;
180 case WLAN_EID_HT_EXTRA_INFO:
181 elems->ht_info_elem = pos;
182 elems->ht_info_elem_len = elen;
183 break;
ee385855
LCC		 184 case WLAN_EID_MESH_ID:
185 elems->mesh_id = pos;
186 elems->mesh_id_len = elen;
187 break;
188 case WLAN_EID_MESH_CONFIG:
189 elems->mesh_config = pos;
190 elems->mesh_config_len = elen;
191 break;
192 case WLAN_EID_PEER_LINK:
193 elems->peer_link = pos;
194 elems->peer_link_len = elen;
195 break;
196 case WLAN_EID_PREQ:
197 elems->preq = pos;
198 elems->preq_len = elen;
199 break;
200 case WLAN_EID_PREP:
201 elems->prep = pos;
202 elems->prep_len = elen;
203 break;
204 case WLAN_EID_PERR:
205 elems->perr = pos;
206 elems->perr_len = elen;
207 break;
f0706e82 208 default:
f0706e82
JB		 209 break;
210 }
211
212 left -= elen;
213 pos += elen;
214 }
f0706e82
JB		 215}
216
217
f0706e82
JB		 218static int ecw2cw(int ecw)
219{
ac2bf324 220 return (1 << ecw) - 1;
f0706e82
JB		 221}
222
e2839d8f
VK		 223
224static void ieee80211_sta_def_wmm_params(struct net_device *dev,
225 struct ieee80211_sta_bss *bss,
226 int ibss)
227{
228 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
229 struct ieee80211_local *local = sdata->local;
230 int i, have_higher_than_11mbit = 0;
231
232
233 /* cf. IEEE 802.11 9.2.12 */
234 for (i = 0; i < bss->supp_rates_len; i++)
235 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
236 have_higher_than_11mbit = 1;
237
238 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
239 have_higher_than_11mbit)
240 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
241 else
242 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
243
244
245 if (local->ops->conf_tx) {
246 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 247
248 memset(&qparam, 0, sizeof(qparam));
249
250 qparam.aifs = 2;
251
252 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
253 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
254 qparam.cw_min = 31;
255 else
256 qparam.cw_min = 15;
257
258 qparam.cw_max = 1023;
259 qparam.txop = 0;
260
261 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
262 local->ops->conf_tx(local_to_hw(local),
263 i + IEEE80211_TX_QUEUE_DATA0,
264 &qparam);
265
266 if (ibss) {
267 /* IBSS uses different parameters for Beacon sending */
268 qparam.cw_min++;
269 qparam.cw_min *= 2;
270 qparam.cw_min--;
271 local->ops->conf_tx(local_to_hw(local),
272 IEEE80211_TX_QUEUE_BEACON, &qparam);
273 }
274 }
275}
276
f0706e82
JB		 277static void ieee80211_sta_wmm_params(struct net_device *dev,
278 struct ieee80211_if_sta *ifsta,
279 u8 *wmm_param, size_t wmm_param_len)
280{
281 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
282 struct ieee80211_tx_queue_params params;
283 size_t left;
284 int count;
285 u8 *pos;
286
287 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
288 return;
289 count = wmm_param[6] & 0x0f;
290 if (count == ifsta->wmm_last_param_set)
291 return;
292 ifsta->wmm_last_param_set = count;
293
294 pos = wmm_param + 8;
295 left = wmm_param_len - 8;
296
297 memset(&params, 0, sizeof(params));
298
299 if (!local->ops->conf_tx)
300 return;
301
302 local->wmm_acm = 0;
303 for (; left >= 4; left -= 4, pos += 4) {
304 int aci = (pos[0] >> 5) & 0x03;
305 int acm = (pos[0] >> 4) & 0x01;
306 int queue;
307
308 switch (aci) {
309 case 1:
310 queue = IEEE80211_TX_QUEUE_DATA3;
311 if (acm) {
312 local->wmm_acm |= BIT(0) | BIT(3);
313 }
314 break;
315 case 2:
316 queue = IEEE80211_TX_QUEUE_DATA1;
317 if (acm) {
318 local->wmm_acm |= BIT(4) | BIT(5);
319 }
320 break;
321 case 3:
322 queue = IEEE80211_TX_QUEUE_DATA0;
323 if (acm) {
324 local->wmm_acm |= BIT(6) | BIT(7);
325 }
326 break;
327 case 0:
328 default:
329 queue = IEEE80211_TX_QUEUE_DATA2;
330 if (acm) {
331 local->wmm_acm |= BIT(1) | BIT(2);
332 }
333 break;
334 }
335
336 params.aifs = pos[0] & 0x0f;
337 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
338 params.cw_min = ecw2cw(pos[1] & 0x0f);
3330d7be
JB		 339 params.txop = pos[2] | (pos[3] << 8);
340#ifdef CONFIG_MAC80211_DEBUG
f0706e82 341 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 342 "cWmin=%d cWmax=%d txop=%d\n",
f0706e82 343 dev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 344 params.cw_max, params.txop);
345#endif
f0706e82
JB		 346 /* TODO: handle ACM (block TX, fallback to next lowest allowed
347 * AC for now) */
348 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
349 printk(KERN_DEBUG "%s: failed to set TX queue "
350 "parameters for queue %d\n", dev->name, queue);
351 }
352 }
353}
354
355
471b3efd
JB		 356static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
357 u8 erp_value)
5628221c 358{
471b3efd 359 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
5628221c 360 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
471b3efd 361 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
d43c7b37 362 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
0795af57 363 DECLARE_MAC_BUF(mac);
471b3efd 364 u32 changed = 0;
5628221c 365
471b3efd 366 if (use_protection != bss_conf->use_cts_prot) {
5628221c
DD		 367 if (net_ratelimit()) {
368 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 369 "%s)\n",
471b3efd 370 sdata->dev->name,
5628221c 371 use_protection ? "enabled" : "disabled",
0795af57 372 print_mac(mac, ifsta->bssid));
5628221c 373 }
471b3efd
JB		 374 bss_conf->use_cts_prot = use_protection;
375 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 376 }
7e9ed188 377
d43c7b37 378 if (use_short_preamble != bss_conf->use_short_preamble) {
7e9ed188
DD		 379 if (net_ratelimit()) {
380 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 381 " (BSSID=%s)\n",
471b3efd 382 sdata->dev->name,
d43c7b37 383 use_short_preamble ? "short" : "long",
0795af57 384 print_mac(mac, ifsta->bssid));
7e9ed188 385 }
d43c7b37 386 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 387 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 388 }
d9430a32 389
471b3efd 390 return changed;
5628221c
DD		 391}
392
c7153508
RR		 393int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
394 struct ieee80211_ht_info *ht_info)
395{
396
397 if (ht_info == NULL)
398 return -EINVAL;
399
400 memset(ht_info, 0, sizeof(*ht_info));
401
402 if (ht_cap_ie) {
403 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
404
405 ht_info->ht_supported = 1;
406 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
407 ht_info->ampdu_factor =
408 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
409 ht_info->ampdu_density =
410 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
411 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
412 } else
413 ht_info->ht_supported = 0;
414
415 return 0;
416}
417
418int ieee80211_ht_addt_info_ie_to_ht_bss_info(
419 struct ieee80211_ht_addt_info *ht_add_info_ie,
420 struct ieee80211_ht_bss_info *bss_info)
421{
422 if (bss_info == NULL)
423 return -EINVAL;
424
425 memset(bss_info, 0, sizeof(*bss_info));
426
427 if (ht_add_info_ie) {
428 u16 op_mode;
429 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
430
431 bss_info->primary_channel = ht_add_info_ie->control_chan;
432 bss_info->bss_cap = ht_add_info_ie->ht_param;
433 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
434 }
435
436 return 0;
437}
5628221c 438
f0706e82
JB		 439static void ieee80211_sta_send_associnfo(struct net_device *dev,
440 struct ieee80211_if_sta *ifsta)
441{
442 char *buf;
443 size_t len;
444 int i;
445 union iwreq_data wrqu;
446
447 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
448 return;
449
450 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 451 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 452 if (!buf)
453 return;
454
455 len = sprintf(buf, "ASSOCINFO(");
456 if (ifsta->assocreq_ies) {
457 len += sprintf(buf + len, "ReqIEs=");
458 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
459 len += sprintf(buf + len, "%02x",
460 ifsta->assocreq_ies[i]);
461 }
462 }
463 if (ifsta->assocresp_ies) {
464 if (ifsta->assocreq_ies)
465 len += sprintf(buf + len, " ");
466 len += sprintf(buf + len, "RespIEs=");
467 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
468 len += sprintf(buf + len, "%02x",
469 ifsta->assocresp_ies[i]);
470 }
471 }
472 len += sprintf(buf + len, ")");
473
474 if (len > IW_CUSTOM_MAX) {
475 len = sprintf(buf, "ASSOCRESPIE=");
476 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
477 len += sprintf(buf + len, "%02x",
478 ifsta->assocresp_ies[i]);
479 }
480 }
481
482 memset(&wrqu, 0, sizeof(wrqu));
483 wrqu.data.length = len;
484 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
485
486 kfree(buf);
487}
488
489
490static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 491 struct ieee80211_if_sta *ifsta,
47f0c502 492 bool assoc)
f0706e82 493{
471b3efd
JB		 494 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
495 struct ieee80211_local *local = sdata->local;
38668c05 496 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 497 union iwreq_data wrqu;
471b3efd 498 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 499
f0706e82 500 if (assoc) {
5628221c 501 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 502
503 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
504
51fb61e7 505 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 506 return;
5628221c 507
65c107ab 508 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
38668c05 509 conf->channel->center_freq,
cffdd30d 510 ifsta->ssid, ifsta->ssid_len);
5628221c 511 if (bss) {
21c0cbe7
TW		 512 /* set timing information */
513 sdata->bss_conf.beacon_int = bss->beacon_int;
514 sdata->bss_conf.timestamp = bss->timestamp;
515
5628221c 516 if (bss->has_erp_value)
471b3efd
JB		 517 changed |= ieee80211_handle_erp_ie(
518 sdata, bss->erp_value);
21c0cbe7 519
5628221c
DD		 520 ieee80211_rx_bss_put(dev, bss);
521 }
522
38668c05
TW		 523 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
524 changed |= BSS_CHANGED_HT;
525 sdata->bss_conf.assoc_ht = 1;
526 sdata->bss_conf.ht_conf = &conf->ht_conf;
527 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
528 }
529
f0706e82 530 netif_carrier_on(dev);
d6f2da5b 531 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 532 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
533 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
534 ieee80211_sta_send_associnfo(dev, ifsta);
535 } else {
85249e5f 536 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
d6f2da5b 537 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
f0706e82 538 netif_carrier_off(dev);
d9430a32 539 ieee80211_reset_erp_info(dev);
38668c05
TW		 540
541 sdata->bss_conf.assoc_ht = 0;
542 sdata->bss_conf.ht_conf = NULL;
543 sdata->bss_conf.ht_bss_conf = NULL;
544
f0706e82
JB		 545 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
546 }
547 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
548 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
549 ifsta->last_probe = jiffies;
47f0c502 550 ieee80211_led_assoc(local, assoc);
471b3efd 551
b2205256 552 sdata->bss_conf.assoc = assoc;
471b3efd 553 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 554}
555
556static void ieee80211_set_disassoc(struct net_device *dev,
557 struct ieee80211_if_sta *ifsta, int deauth)
558{
559 if (deauth)
560 ifsta->auth_tries = 0;
561 ifsta->assoc_tries = 0;
562 ieee80211_set_associated(dev, ifsta, 0);
563}
564
ee385855
LCC		 565void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
566 int encrypt)
f0706e82
JB		 567{
568 struct ieee80211_sub_if_data *sdata;
569 struct ieee80211_tx_packet_data *pkt_data;
570
571 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
572 skb->dev = sdata->local->mdev;
573 skb_set_mac_header(skb, 0);
574 skb_set_network_header(skb, 0);
575 skb_set_transport_header(skb, 0);
576
577 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
578 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
579 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 580 if (!encrypt)
581 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 582
583 dev_queue_xmit(skb);
584}
585
586
587static void ieee80211_send_auth(struct net_device *dev,
588 struct ieee80211_if_sta *ifsta,
589 int transaction, u8 *extra, size_t extra_len,
590 int encrypt)
591{
592 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
593 struct sk_buff *skb;
594 struct ieee80211_mgmt *mgmt;
595
596 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
597 sizeof(*mgmt) + 6 + extra_len);
598 if (!skb) {
599 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
600 "frame\n", dev->name);
601 return;
602 }
603 skb_reserve(skb, local->hw.extra_tx_headroom);
604
605 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
606 memset(mgmt, 0, 24 + 6);
607 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
608 IEEE80211_STYPE_AUTH);
609 if (encrypt)
610 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
611 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
612 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
613 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
614 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
615 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
616 ifsta->auth_transaction = transaction + 1;
617 mgmt->u.auth.status_code = cpu_to_le16(0);
618 if (extra)
619 memcpy(skb_put(skb, extra_len), extra, extra_len);
620
621 ieee80211_sta_tx(dev, skb, encrypt);
622}
623
624
625static void ieee80211_authenticate(struct net_device *dev,
626 struct ieee80211_if_sta *ifsta)
627{
0795af57
JP		 628 DECLARE_MAC_BUF(mac);
629
f0706e82
JB		 630 ifsta->auth_tries++;
631 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 632 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 633 " timed out\n",
0795af57 634 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 635 ifsta->state = IEEE80211_DISABLED;
636 return;
637 }
638
639 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 640 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
641 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 642
643 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
644
645 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
646}
647
648
649static void ieee80211_send_assoc(struct net_device *dev,
650 struct ieee80211_if_sta *ifsta)
651{
652 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 653 struct sk_buff *skb;
654 struct ieee80211_mgmt *mgmt;
655 u8 *pos, *ies;
656 int i, len;
657 u16 capab;
658 struct ieee80211_sta_bss *bss;
659 int wmm = 0;
8318d78a 660 struct ieee80211_supported_band *sband;
f0706e82
JB		 661
662 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
663 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
664 ifsta->ssid_len);
665 if (!skb) {
666 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
667 "frame\n", dev->name);
668 return;
669 }
670 skb_reserve(skb, local->hw.extra_tx_headroom);
671
8318d78a
JB		 672 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
673
f0706e82 674 capab = ifsta->capab;
8318d78a
JB		 675
676 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
677 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
678 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
679 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
680 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 681 }
8318d78a
JB		 682
683 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
684 local->hw.conf.channel->center_freq,
cffdd30d 685 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 686 if (bss) {
687 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
688 capab |= WLAN_CAPABILITY_PRIVACY;
689 if (bss->wmm_ie) {
690 wmm = 1;
691 }
692 ieee80211_rx_bss_put(dev, bss);
693 }
694
695 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
696 memset(mgmt, 0, 24);
697 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
698 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
699 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
700
d6f2da5b 701 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 702 skb_put(skb, 10);
703 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
704 IEEE80211_STYPE_REASSOC_REQ);
705 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
706 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
707 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
708 ETH_ALEN);
709 } else {
710 skb_put(skb, 4);
711 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
712 IEEE80211_STYPE_ASSOC_REQ);
713 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
714 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
715 }
716
717 /* SSID */
718 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
719 *pos++ = WLAN_EID_SSID;
720 *pos++ = ifsta->ssid_len;
721 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
722
8318d78a 723 len = sband->n_bitrates;
f0706e82
JB		 724 if (len > 8)
725 len = 8;
726 pos = skb_put(skb, len + 2);
727 *pos++ = WLAN_EID_SUPP_RATES;
728 *pos++ = len;
729 for (i = 0; i < len; i++) {
8318d78a 730 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 731 *pos++ = (u8) (rate / 5);
732 }
733
8318d78a
JB		 734 if (sband->n_bitrates > len) {
735 pos = skb_put(skb, sband->n_bitrates - len + 2);
f0706e82 736 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8318d78a
JB		 737 *pos++ = sband->n_bitrates - len;
738 for (i = len; i < sband->n_bitrates; i++) {
739 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 740 *pos++ = (u8) (rate / 5);
741 }
742 }
743
744 if (ifsta->extra_ie) {
745 pos = skb_put(skb, ifsta->extra_ie_len);
746 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
747 }
748
d6f2da5b 749 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 750 pos = skb_put(skb, 9);
751 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
752 *pos++ = 7; /* len */
753 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
754 *pos++ = 0x50;
755 *pos++ = 0xf2;
756 *pos++ = 2; /* WME */
757 *pos++ = 0; /* WME info */
758 *pos++ = 1; /* WME ver */
759 *pos++ = 0;
760 }
c7153508 761 /* wmm support is a must to HT */
8318d78a
JB		 762 if (wmm && sband->ht_info.ht_supported) {
763 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
c7153508
RR		 764 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
765 *pos++ = WLAN_EID_HT_CAPABILITY;
766 *pos++ = sizeof(struct ieee80211_ht_cap);
767 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
768 memcpy(pos, &tmp, sizeof(u16));
769 pos += sizeof(u16);
8318d78a
JB		 770 /* TODO: needs a define here for << 2 */
771 *pos++ = sband->ht_info.ampdu_factor |
772 (sband->ht_info.ampdu_density << 2);
773 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 774 }
f0706e82
JB		 775
776 kfree(ifsta->assocreq_ies);
777 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 778 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 779 if (ifsta->assocreq_ies)
780 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
781
782 ieee80211_sta_tx(dev, skb, 0);
783}
784
785
786static void ieee80211_send_deauth(struct net_device *dev,
787 struct ieee80211_if_sta *ifsta, u16 reason)
788{
789 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
790 struct sk_buff *skb;
791 struct ieee80211_mgmt *mgmt;
792
793 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
794 if (!skb) {
795 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
796 "frame\n", dev->name);
797 return;
798 }
799 skb_reserve(skb, local->hw.extra_tx_headroom);
800
801 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
802 memset(mgmt, 0, 24);
803 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
804 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
805 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
806 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
807 IEEE80211_STYPE_DEAUTH);
808 skb_put(skb, 2);
809 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
810
811 ieee80211_sta_tx(dev, skb, 0);
812}
813
814
815static void ieee80211_send_disassoc(struct net_device *dev,
816 struct ieee80211_if_sta *ifsta, u16 reason)
817{
818 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
819 struct sk_buff *skb;
820 struct ieee80211_mgmt *mgmt;
821
822 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
823 if (!skb) {
824 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
825 "frame\n", dev->name);
826 return;
827 }
828 skb_reserve(skb, local->hw.extra_tx_headroom);
829
830 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
831 memset(mgmt, 0, 24);
832 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
833 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
834 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
835 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
836 IEEE80211_STYPE_DISASSOC);
837 skb_put(skb, 2);
838 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
839
840 ieee80211_sta_tx(dev, skb, 0);
841}
842
843
844static int ieee80211_privacy_mismatch(struct net_device *dev,
845 struct ieee80211_if_sta *ifsta)
846{
65c107ab 847 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 848 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 849 int bss_privacy;
850 int wep_privacy;
851 int privacy_invoked;
f0706e82 852
5b98b1f7 853 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 854 return 0;
855
8318d78a
JB		 856 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
857 local->hw.conf.channel->center_freq,
cffdd30d 858 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 859 if (!bss)
860 return 0;
861
5b98b1f7
JB		 862 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
863 wep_privacy = !!ieee80211_sta_wep_configured(dev);
864 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 865
866 ieee80211_rx_bss_put(dev, bss);
867
5b98b1f7
JB		 868 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
869 return 0;
870
871 return 1;
f0706e82
JB		 872}
873
874
875static void ieee80211_associate(struct net_device *dev,
876 struct ieee80211_if_sta *ifsta)
877{
0795af57
JP		 878 DECLARE_MAC_BUF(mac);
879
f0706e82
JB		 880 ifsta->assoc_tries++;
881 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 882 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 883 " timed out\n",
0795af57 884 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 885 ifsta->state = IEEE80211_DISABLED;
886 return;
887 }
888
889 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 890 printk(KERN_DEBUG "%s: associate with AP %s\n",
891 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 892 if (ieee80211_privacy_mismatch(dev, ifsta)) {
893 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
894 "mixed-cell disabled - abort association\n", dev->name);
895 ifsta->state = IEEE80211_DISABLED;
896 return;
897 }
898
899 ieee80211_send_assoc(dev, ifsta);
900
901 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
902}
903
904
905static void ieee80211_associated(struct net_device *dev,
906 struct ieee80211_if_sta *ifsta)
907{
908 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
909 struct sta_info *sta;
910 int disassoc;
0795af57 911 DECLARE_MAC_BUF(mac);
f0706e82
JB		 912
913 /* TODO: start monitoring current AP signal quality and number of
914 * missed beacons. Scan other channels every now and then and search
915 * for better APs. */
916 /* TODO: remove expired BSSes */
917
918 ifsta->state = IEEE80211_ASSOCIATED;
919
d0709a65
JB		 920 rcu_read_lock();
921
f0706e82
JB		 922 sta = sta_info_get(local, ifsta->bssid);
923 if (!sta) {
0795af57
JP		 924 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
925 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 926 disassoc = 1;
927 } else {
928 disassoc = 0;
929 if (time_after(jiffies,
930 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 931 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 932 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 933 "current AP %s - assume out of "
f0706e82 934 "range\n",
0795af57 935 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 936 disassoc = 1;
d0709a65 937 sta_info_unlink(&sta);
d6f2da5b 938 } else
f0706e82
JB		 939 ieee80211_send_probe_req(dev, ifsta->bssid,
940 local->scan_ssid,
941 local->scan_ssid_len);
d6f2da5b 942 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 943 } else {
d6f2da5b 944 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 945 if (time_after(jiffies, ifsta->last_probe +
946 IEEE80211_PROBE_INTERVAL)) {
947 ifsta->last_probe = jiffies;
948 ieee80211_send_probe_req(dev, ifsta->bssid,
949 ifsta->ssid,
950 ifsta->ssid_len);
951 }
952 }
f0706e82 953 }
d0709a65
JB		 954
955 rcu_read_unlock();
956
957 if (disassoc && sta) {
d0709a65
JB		 958 rtnl_lock();
959 sta_info_destroy(sta);
960 rtnl_unlock();
961 }
962
f0706e82 963 if (disassoc) {
2d192d95
MW		 964 ifsta->state = IEEE80211_DISABLED;
965 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 966 } else {
967 mod_timer(&ifsta->timer, jiffies +
968 IEEE80211_MONITORING_INTERVAL);
969 }
970}
971
972
973static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
974 u8 *ssid, size_t ssid_len)
975{
976 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 977 struct ieee80211_supported_band *sband;
f0706e82
JB		 978 struct sk_buff *skb;
979 struct ieee80211_mgmt *mgmt;
980 u8 *pos, *supp_rates, *esupp_rates = NULL;
981 int i;
982
983 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
984 if (!skb) {
985 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
986 "request\n", dev->name);
987 return;
988 }
989 skb_reserve(skb, local->hw.extra_tx_headroom);
990
991 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
992 memset(mgmt, 0, 24);
993 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
994 IEEE80211_STYPE_PROBE_REQ);
995 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
996 if (dst) {
997 memcpy(mgmt->da, dst, ETH_ALEN);
998 memcpy(mgmt->bssid, dst, ETH_ALEN);
999 } else {
1000 memset(mgmt->da, 0xff, ETH_ALEN);
1001 memset(mgmt->bssid, 0xff, ETH_ALEN);
1002 }
1003 pos = skb_put(skb, 2 + ssid_len);
1004 *pos++ = WLAN_EID_SSID;
1005 *pos++ = ssid_len;
1006 memcpy(pos, ssid, ssid_len);
1007
1008 supp_rates = skb_put(skb, 2);
1009 supp_rates[0] = WLAN_EID_SUPP_RATES;
1010 supp_rates[1] = 0;
8318d78a
JB		 1011 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1012
1013 for (i = 0; i < sband->n_bitrates; i++) {
1014 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 1015 if (esupp_rates) {
1016 pos = skb_put(skb, 1);
1017 esupp_rates[1]++;
1018 } else if (supp_rates[1] == 8) {
1019 esupp_rates = skb_put(skb, 3);
1020 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1021 esupp_rates[1] = 1;
1022 pos = &esupp_rates[2];
1023 } else {
1024 pos = skb_put(skb, 1);
1025 supp_rates[1]++;
1026 }
8318d78a 1027 *pos = rate->bitrate / 5;
f0706e82
JB		 1028 }
1029
1030 ieee80211_sta_tx(dev, skb, 0);
1031}
1032
1033
1034static int ieee80211_sta_wep_configured(struct net_device *dev)
1035{
1036 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1037 if (!sdata || !sdata->default_key ||
8f20fc24 1038 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 1039 return 0;
1040 return 1;
1041}
1042
1043
1044static void ieee80211_auth_completed(struct net_device *dev,
1045 struct ieee80211_if_sta *ifsta)
1046{
1047 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 1048 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1049 ieee80211_associate(dev, ifsta);
1050}
1051
1052
1053static void ieee80211_auth_challenge(struct net_device *dev,
1054 struct ieee80211_if_sta *ifsta,
1055 struct ieee80211_mgmt *mgmt,
1056 size_t len)
1057{
1058 u8 *pos;
1059 struct ieee802_11_elems elems;
1060
1061 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1062 pos = mgmt->u.auth.variable;
67a4cce4 1063 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1064 if (!elems.challenge) {
1065 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1066 "frame\n", dev->name);
1067 return;
1068 }
1069 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1070 elems.challenge_len + 2, 1);
1071}
1072
9f985b0e
RR		 1073static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1074 u8 dialog_token, u16 status, u16 policy,
1075 u16 buf_size, u16 timeout)
1076{
1077 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1078 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1079 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1080 struct sk_buff *skb;
1081 struct ieee80211_mgmt *mgmt;
1082 u16 capab;
1083
07db2183
RR		 1084 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1085 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1086 if (!skb) {
1087 printk(KERN_DEBUG "%s: failed to allocate buffer "
1088 "for addba resp frame\n", dev->name);
1089 return;
1090 }
1091
1092 skb_reserve(skb, local->hw.extra_tx_headroom);
1093 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1094 memset(mgmt, 0, 24);
1095 memcpy(mgmt->da, da, ETH_ALEN);
1096 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1097 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1098 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1099 else
1100 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1101 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1102 IEEE80211_STYPE_ACTION);
1103
1104 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1105 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1106 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1107 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1108
1109 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1110 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1111 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1112
1113 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1114 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1115 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1116
1117 ieee80211_sta_tx(dev, skb, 0);
1118
1119 return;
1120}
1121
eadc8d9e
RR		 1122void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1123 u16 tid, u8 dialog_token, u16 start_seq_num,
1124 u16 agg_size, u16 timeout)
1125{
1126 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1127 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1128 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1129 struct sk_buff *skb;
1130 struct ieee80211_mgmt *mgmt;
1131 u16 capab;
1132
1133 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1134 sizeof(mgmt->u.action.u.addba_req));
1135
1136
1137 if (!skb) {
1138 printk(KERN_ERR "%s: failed to allocate buffer "
1139 "for addba request frame\n", dev->name);
1140 return;
1141 }
1142 skb_reserve(skb, local->hw.extra_tx_headroom);
1143 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1144 memset(mgmt, 0, 24);
1145 memcpy(mgmt->da, da, ETH_ALEN);
1146 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1147 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1148 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1149 else
1150 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1151
1152 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1153 IEEE80211_STYPE_ACTION);
1154
1155 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1156
1157 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1158 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1159
1160 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1161 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1162 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1163 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1164
1165 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1166
1167 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1168 mgmt->u.action.u.addba_req.start_seq_num =
1169 cpu_to_le16(start_seq_num << 4);
1170
1171 ieee80211_sta_tx(dev, skb, 0);
1172}
1173
9f985b0e
RR		 1174static void ieee80211_sta_process_addba_request(struct net_device *dev,
1175 struct ieee80211_mgmt *mgmt,
1176 size_t len)
1177{
1178 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1179 struct ieee80211_hw *hw = &local->hw;
1180 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1181 struct sta_info *sta;
07db2183
RR		 1182 struct tid_ampdu_rx *tid_agg_rx;
1183 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1184 u8 dialog_token;
07db2183
RR		 1185 int ret = -EOPNOTSUPP;
1186 DECLARE_MAC_BUF(mac);
9f985b0e 1187
d0709a65
JB		 1188 rcu_read_lock();
1189
9f985b0e 1190 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1191 if (!sta) {
1192 rcu_read_unlock();
9f985b0e 1193 return;
d0709a65 1194 }
9f985b0e
RR		 1195
1196 /* extract session parameters from addba request frame */
1197 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1198 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1199 start_seq_num =
1200 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1201
1202 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1203 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1204 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1205 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1206
9f985b0e
RR		 1207 status = WLAN_STATUS_REQUEST_DECLINED;
1208
07db2183
RR		 1209 /* sanity check for incoming parameters:
1210 * check if configuration can support the BA policy
1211 * and if buffer size does not exceeds max value */
1212 if (((ba_policy != 1)
1213 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1214 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1215 status = WLAN_STATUS_INVALID_QOS_PARAM;
1216#ifdef CONFIG_MAC80211_HT_DEBUG
1217 if (net_ratelimit())
7b9d44cd 1218 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1219 "%s on tid %u. policy %d, buffer size %d\n",
1220 print_mac(mac, mgmt->sa), tid, ba_policy,
1221 buf_size);
1222#endif /* CONFIG_MAC80211_HT_DEBUG */
1223 goto end_no_lock;
1224 }
1225 /* determine default buffer size */
1226 if (buf_size == 0) {
8318d78a
JB		 1227 struct ieee80211_supported_band *sband;
1228
1229 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1230 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1231 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1232 }
1233
07db2183
RR		 1234
1235 /* examine state machine */
1236 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1237
cee24a3e 1238 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1239#ifdef CONFIG_MAC80211_HT_DEBUG
1240 if (net_ratelimit())
7b9d44cd 1241 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1242 "%s on tid %u\n",
1243 print_mac(mac, mgmt->sa), tid);
1244#endif /* CONFIG_MAC80211_HT_DEBUG */
1245 goto end;
1246 }
1247
cee24a3e
RR		 1248 /* prepare A-MPDU MLME for Rx aggregation */
1249 sta->ampdu_mlme.tid_rx[tid] =
1250 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1251 if (!sta->ampdu_mlme.tid_rx[tid]) {
1252 if (net_ratelimit())
1253 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1254 tid);
1255 goto end;
1256 }
1257 /* rx timer */
1258 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1259 sta_rx_agg_session_timer_expired;
1260 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1261 (unsigned long)&sta->timer_to_tid[tid];
1262 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1263
1264 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1265
07db2183
RR		 1266 /* prepare reordering buffer */
1267 tid_agg_rx->reorder_buf =
1268 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1269 if (!tid_agg_rx->reorder_buf) {
1270 if (net_ratelimit())
1271 printk(KERN_ERR "can not allocate reordering buffer "
1272 "to tid %d\n", tid);
cee24a3e 1273 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1274 goto end;
1275 }
1276 memset(tid_agg_rx->reorder_buf, 0,
1277 buf_size * sizeof(struct sk_buf *));
1278
1279 if (local->ops->ampdu_action)
1280 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1281 sta->addr, tid, &start_seq_num);
07db2183
RR		 1282#ifdef CONFIG_MAC80211_HT_DEBUG
1283 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1284#endif /* CONFIG_MAC80211_HT_DEBUG */
1285
1286 if (ret) {
1287 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1288 kfree(tid_agg_rx);
1289 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1290 goto end;
1291 }
1292
1293 /* change state and send addba resp */
cee24a3e 1294 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1295 tid_agg_rx->dialog_token = dialog_token;
1296 tid_agg_rx->ssn = start_seq_num;
1297 tid_agg_rx->head_seq_num = start_seq_num;
1298 tid_agg_rx->buf_size = buf_size;
1299 tid_agg_rx->timeout = timeout;
1300 tid_agg_rx->stored_mpdu_num = 0;
1301 status = WLAN_STATUS_SUCCESS;
1302end:
1303 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1304
1305end_no_lock:
d0709a65
JB		 1306 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1307 dialog_token, status, 1, buf_size, timeout);
1308 rcu_read_unlock();
9f985b0e 1309}
f0706e82 1310
eadc8d9e
RR		 1311static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1312 struct ieee80211_mgmt *mgmt,
1313 size_t len)
1314{
1315 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1316 struct ieee80211_hw *hw = &local->hw;
1317 struct sta_info *sta;
1318 u16 capab;
1319 u16 tid;
1320 u8 *state;
1321
d0709a65
JB		 1322 rcu_read_lock();
1323
eadc8d9e 1324 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1325 if (!sta) {
1326 rcu_read_unlock();
eadc8d9e 1327 return;
d0709a65 1328 }
eadc8d9e
RR		 1329
1330 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1331 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1332
cee24a3e 1333 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1334
1335 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1336
cee24a3e
RR		 1337 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1338 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1339 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1340 "%d\n", *state);
1341 goto addba_resp_exit;
1342 }
1343
eadc8d9e 1344 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1345 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
eadc8d9e
RR		 1346 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1347#ifdef CONFIG_MAC80211_HT_DEBUG
1348 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1349#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1350 goto addba_resp_exit;
eadc8d9e
RR		 1351 }
1352
cee24a3e 1353 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1354#ifdef CONFIG_MAC80211_HT_DEBUG
1355 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1356#endif /* CONFIG_MAC80211_HT_DEBUG */
1357 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1358 == WLAN_STATUS_SUCCESS) {
eadc8d9e
RR		 1359 if (*state & HT_ADDBA_RECEIVED_MSK)
1360 printk(KERN_DEBUG "double addBA response\n");
1361
1362 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1363 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e
RR		 1364
1365 if (*state == HT_AGG_STATE_OPERATIONAL) {
1366 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1367 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1368 }
1369
1370 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1371 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1372 } else {
1373 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1374
cee24a3e 1375 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1376 /* this will allow the state check in stop_BA_session */
1377 *state = HT_AGG_STATE_OPERATIONAL;
1378 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1379 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1380 WLAN_BACK_INITIATOR);
1381 }
cee24a3e
RR		 1382
1383addba_resp_exit:
d0709a65 1384 rcu_read_unlock();
eadc8d9e
RR		 1385}
1386
1387void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1388 u16 initiator, u16 reason_code)
07db2183
RR		 1389{
1390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1391 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1392 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1393 struct sk_buff *skb;
1394 struct ieee80211_mgmt *mgmt;
1395 u16 params;
1396
1397 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1398 sizeof(mgmt->u.action.u.delba));
1399
1400 if (!skb) {
1401 printk(KERN_ERR "%s: failed to allocate buffer "
1402 "for delba frame\n", dev->name);
1403 return;
1404 }
1405
1406 skb_reserve(skb, local->hw.extra_tx_headroom);
1407 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1408 memset(mgmt, 0, 24);
1409 memcpy(mgmt->da, da, ETH_ALEN);
1410 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1411 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1412 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1413 else
1414 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1415 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1416 IEEE80211_STYPE_ACTION);
1417
1418 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1419
1420 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1421 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1422 params = (u16)(initiator << 11); /* bit 11 initiator */
1423 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1424
1425 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1426 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1427
1428 ieee80211_sta_tx(dev, skb, 0);
1429}
1430
1431void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1432 u16 initiator, u16 reason)
1433{
1434 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1435 struct ieee80211_hw *hw = &local->hw;
1436 struct sta_info *sta;
b580781e 1437 int ret, i;
07db2183 1438
d0709a65
JB		 1439 rcu_read_lock();
1440
07db2183 1441 sta = sta_info_get(local, ra);
d0709a65
JB		 1442 if (!sta) {
1443 rcu_read_unlock();
07db2183 1444 return;
d0709a65 1445 }
07db2183
RR		 1446
1447 /* check if TID is in operational state */
1448 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
cee24a3e 1449 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183
RR		 1450 != HT_AGG_STATE_OPERATIONAL) {
1451 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
d0709a65 1452 rcu_read_unlock();
07db2183
RR		 1453 return;
1454 }
cee24a3e 1455 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1456 HT_AGG_STATE_REQ_STOP_BA_MSK |
1457 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1458 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1459
1460 /* stop HW Rx aggregation. ampdu_action existence
1461 * already verified in session init so we add the BUG_ON */
1462 BUG_ON(!local->ops->ampdu_action);
1463
1464 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1465 ra, tid, NULL);
07db2183
RR		 1466 if (ret)
1467 printk(KERN_DEBUG "HW problem - can not stop rx "
1468 "aggergation for tid %d\n", tid);
1469
1470 /* shutdown timer has not expired */
1471 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1472 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1473
1474 /* check if this is a self generated aggregation halt */
1475 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1476 ieee80211_send_delba(dev, ra, tid, 0, reason);
1477
1478 /* free the reordering buffer */
cee24a3e
RR		 1479 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1480 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1481 /* release the reordered frames */
cee24a3e
RR		 1482 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1483 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1484 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1485 }
1486 }
cee24a3e
RR		 1487 /* free resources */
1488 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1489 kfree(sta->ampdu_mlme.tid_rx[tid]);
1490 sta->ampdu_mlme.tid_rx[tid] = NULL;
1491 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1492
d0709a65 1493 rcu_read_unlock();
07db2183
RR		 1494}
1495
eadc8d9e 1496
688b88a4
RR		 1497static void ieee80211_sta_process_delba(struct net_device *dev,
1498 struct ieee80211_mgmt *mgmt, size_t len)
1499{
1500 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1501 struct sta_info *sta;
1502 u16 tid, params;
1503 u16 initiator;
1504 DECLARE_MAC_BUF(mac);
1505
d0709a65
JB		 1506 rcu_read_lock();
1507
688b88a4 1508 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1509 if (!sta) {
1510 rcu_read_unlock();
688b88a4 1511 return;
d0709a65 1512 }
688b88a4
RR		 1513
1514 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1515 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1516 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1517
1518#ifdef CONFIG_MAC80211_HT_DEBUG
1519 if (net_ratelimit())
d92684e6
RR		 1520 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1521 print_mac(mac, mgmt->sa),
2e354ed7 1522 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1523 mgmt->u.action.u.delba.reason_code);
1524#endif /* CONFIG_MAC80211_HT_DEBUG */
1525
1526 if (initiator == WLAN_BACK_INITIATOR)
1527 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1528 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1529 else { /* WLAN_BACK_RECIPIENT */
1530 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
cee24a3e 1531 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6
RR		 1532 HT_AGG_STATE_OPERATIONAL;
1533 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1534 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1535 WLAN_BACK_RECIPIENT);
1536 }
d0709a65 1537 rcu_read_unlock();
688b88a4
RR		 1538}
1539
eadc8d9e
RR		 1540/*
1541 * After sending add Block Ack request we activated a timer until
1542 * add Block Ack response will arrive from the recipient.
1543 * If this timer expires sta_addba_resp_timer_expired will be executed.
1544 */
1545void sta_addba_resp_timer_expired(unsigned long data)
1546{
1547 /* not an elegant detour, but there is no choice as the timer passes
1548 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1549 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e
RR		 1550 * array gives the sta through container_of */
1551 u16 tid = *(int *)data;
1552 struct sta_info *temp_sta = container_of((void *)data,
1553 struct sta_info, timer_to_tid[tid]);
1554
1555 struct ieee80211_local *local = temp_sta->local;
1556 struct ieee80211_hw *hw = &local->hw;
1557 struct sta_info *sta;
1558 u8 *state;
1559
d0709a65
JB		 1560 rcu_read_lock();
1561
eadc8d9e 1562 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1563 if (!sta) {
1564 rcu_read_unlock();
eadc8d9e 1565 return;
d0709a65 1566 }
eadc8d9e 1567
cee24a3e 1568 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1569 /* check if the TID waits for addBA response */
1570 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1571 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1572 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1573 *state = HT_AGG_STATE_IDLE;
1574 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1575 "expecting addBA response there", tid);
1576 goto timer_expired_exit;
1577 }
1578
1579 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1580
1581 /* go through the state check in stop_BA_session */
1582 *state = HT_AGG_STATE_OPERATIONAL;
1583 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1584 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1585 WLAN_BACK_INITIATOR);
1586
1587timer_expired_exit:
d0709a65 1588 rcu_read_unlock();
eadc8d9e
RR		 1589}
1590
07db2183 1591/*
7b9d44cd
RR		 1592 * After accepting the AddBA Request we activated a timer,
1593 * resetting it after each frame that arrives from the originator.
07db2183
RR		 1594 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1595 */
1596void sta_rx_agg_session_timer_expired(unsigned long data)
1597{
1598 /* not an elegant detour, but there is no choice as the timer passes
1599 * only one argument, and verious sta_info are needed here, so init
73651ee6 1600 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1601 * array gives the sta through container_of */
1602 u8 *ptid = (u8 *)data;
1603 u8 *timer_to_id = ptid - *ptid;
1604 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1605 timer_to_tid[0]);
1606
1607 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
d0709a65
JB		 1608 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1609 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1610 WLAN_REASON_QSTA_TIMEOUT);
1611}
1612
85249e5f
RR		 1613void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1614{
1615 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1616 int i;
1617
1618 for (i = 0; i < STA_TID_NUM; i++) {
1619 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1620 WLAN_BACK_INITIATOR);
1621 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1622 WLAN_BACK_RECIPIENT,
1623 WLAN_REASON_QSTA_LEAVE_QBSS);
1624 }
1625}
07db2183 1626
f0706e82
JB		 1627static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1628 struct ieee80211_if_sta *ifsta,
1629 struct ieee80211_mgmt *mgmt,
1630 size_t len)
1631{
1632 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1633 u16 auth_alg, auth_transaction, status_code;
0795af57 1634 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1635
1636 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1637 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1638 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1639 "%s, but not in authenticate state - ignored\n",
1640 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1641 return;
1642 }
1643
1644 if (len < 24 + 6) {
1645 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1646 "received from %s - ignored\n",
1647 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1648 return;
1649 }
1650
51fb61e7 1651 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1652 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1653 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1654 "unknown AP (SA=%s BSSID=%s) - "
1655 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1656 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1657 return;
1658 }
1659
51fb61e7 1660 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1661 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1662 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1663 "unknown BSSID (SA=%s BSSID=%s) - "
1664 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1665 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1666 return;
1667 }
1668
1669 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1670 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1671 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1672
0795af57 1673 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1674 "transaction=%d status=%d)\n",
0795af57 1675 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1676 auth_transaction, status_code);
1677
51fb61e7 1678 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1679 /* IEEE 802.11 standard does not require authentication in IBSS
1680 * networks and most implementations do not seem to use it.
1681 * However, try to reply to authentication attempts if someone
1682 * has actually implemented this.
1683 * TODO: Could implement shared key authentication. */
1684 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1685 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1686 "frame (alg=%d transaction=%d)\n",
1687 dev->name, auth_alg, auth_transaction);
1688 return;
1689 }
1690 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1691 }
1692
1693 if (auth_alg != ifsta->auth_alg ||
1694 auth_transaction != ifsta->auth_transaction) {
1695 printk(KERN_DEBUG "%s: unexpected authentication frame "
1696 "(alg=%d transaction=%d)\n",
1697 dev->name, auth_alg, auth_transaction);
1698 return;
1699 }
1700
1701 if (status_code != WLAN_STATUS_SUCCESS) {
1702 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1703 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1704 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1705 u8 algs[3];
1706 const int num_algs = ARRAY_SIZE(algs);
1707 int i, pos;
1708 algs[0] = algs[1] = algs[2] = 0xff;
1709 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1710 algs[0] = WLAN_AUTH_OPEN;
1711 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1712 algs[1] = WLAN_AUTH_SHARED_KEY;
1713 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1714 algs[2] = WLAN_AUTH_LEAP;
1715 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1716 pos = 0;
1717 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1718 pos = 1;
1719 else
1720 pos = 2;
1721 for (i = 0; i < num_algs; i++) {
1722 pos++;
1723 if (pos >= num_algs)
1724 pos = 0;
1725 if (algs[pos] == ifsta->auth_alg ||
1726 algs[pos] == 0xff)
1727 continue;
1728 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1729 !ieee80211_sta_wep_configured(dev))
1730 continue;
1731 ifsta->auth_alg = algs[pos];
1732 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1733 "next try\n",
1734 dev->name, ifsta->auth_alg);
1735 break;
1736 }
1737 }
1738 return;
1739 }
1740
1741 switch (ifsta->auth_alg) {
1742 case WLAN_AUTH_OPEN:
1743 case WLAN_AUTH_LEAP:
1744 ieee80211_auth_completed(dev, ifsta);
1745 break;
1746 case WLAN_AUTH_SHARED_KEY:
1747 if (ifsta->auth_transaction == 4)
1748 ieee80211_auth_completed(dev, ifsta);
1749 else
1750 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1751 break;
1752 }
1753}
1754
1755
1756static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1757 struct ieee80211_if_sta *ifsta,
1758 struct ieee80211_mgmt *mgmt,
1759 size_t len)
1760{
1761 u16 reason_code;
0795af57 1762 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1763
1764 if (len < 24 + 2) {
1765 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1766 "received from %s - ignored\n",
1767 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1768 return;
1769 }
1770
1771 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1772 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1773 "unknown AP (SA=%s BSSID=%s) - "
1774 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1775 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1776 return;
1777 }
1778
1779 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1780
0795af57 1781 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1782 " (reason=%d)\n",
0795af57 1783 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1784
d6f2da5b 1785 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1786 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1787 }
1788
1789 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1790 ifsta->state == IEEE80211_ASSOCIATE ||
1791 ifsta->state == IEEE80211_ASSOCIATED) {
1792 ifsta->state = IEEE80211_AUTHENTICATE;
1793 mod_timer(&ifsta->timer, jiffies +
1794 IEEE80211_RETRY_AUTH_INTERVAL);
1795 }
1796
1797 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1798 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1799}
1800
1801
1802static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1803 struct ieee80211_if_sta *ifsta,
1804 struct ieee80211_mgmt *mgmt,
1805 size_t len)
1806{
1807 u16 reason_code;
0795af57 1808 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1809
1810 if (len < 24 + 2) {
1811 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1812 "received from %s - ignored\n",
1813 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1814 return;
1815 }
1816
1817 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1818 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1819 "unknown AP (SA=%s BSSID=%s) - "
1820 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1821 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1822 return;
1823 }
1824
1825 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1826
0795af57 1827 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1828 " (reason=%d)\n",
0795af57 1829 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1830
d6f2da5b 1831 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1832 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1833
1834 if (ifsta->state == IEEE80211_ASSOCIATED) {
1835 ifsta->state = IEEE80211_ASSOCIATE;
1836 mod_timer(&ifsta->timer, jiffies +
1837 IEEE80211_RETRY_AUTH_INTERVAL);
1838 }
1839
1840 ieee80211_set_disassoc(dev, ifsta, 0);
1841}
1842
1843
471b3efd 1844static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1845 struct ieee80211_if_sta *ifsta,
1846 struct ieee80211_mgmt *mgmt,
1847 size_t len,
1848 int reassoc)
1849{
471b3efd
JB		 1850 struct ieee80211_local *local = sdata->local;
1851 struct net_device *dev = sdata->dev;
8318d78a 1852 struct ieee80211_supported_band *sband;
f0706e82 1853 struct sta_info *sta;
8318d78a 1854 u64 rates, basic_rates;
f0706e82
JB		 1855 u16 capab_info, status_code, aid;
1856 struct ieee802_11_elems elems;
471b3efd 1857 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1858 u8 *pos;
1859 int i, j;
0795af57 1860 DECLARE_MAC_BUF(mac);
8318d78a 1861 bool have_higher_than_11mbit = false;
f0706e82
JB		 1862
1863 /* AssocResp and ReassocResp have identical structure, so process both
1864 * of them in this function. */
1865
1866 if (ifsta->state != IEEE80211_ASSOCIATE) {
1867 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1868 "%s, but not in associate state - ignored\n",
1869 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1870 return;
1871 }
1872
1873 if (len < 24 + 6) {
1874 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1875 "received from %s - ignored\n",
1876 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1877 return;
1878 }
1879
1880 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1881 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1882 "unknown AP (SA=%s BSSID=%s) - "
1883 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1884 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1885 return;
1886 }
1887
1888 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1889 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1890 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1891
0795af57 1892 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1893 "status=%d aid=%d)\n",
0795af57 1894 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1895 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1896
1897 if (status_code != WLAN_STATUS_SUCCESS) {
1898 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1899 dev->name, status_code);
8a69aa93
DD		 1900 /* if this was a reassociation, ensure we try a "full"
1901 * association next time. This works around some broken APs
1902 * which do not correctly reject reassociation requests. */
d6f2da5b 1903 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1904 return;
1905 }
1906
1dd84aa2
JB		 1907 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1908 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1909 "set\n", dev->name, aid);
1910 aid &= ~(BIT(15) | BIT(14));
1911
f0706e82 1912 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1913 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1914
1915 if (!elems.supp_rates) {
1916 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1917 dev->name);
1918 return;
1919 }
1920
1921 printk(KERN_DEBUG "%s: associated\n", dev->name);
1922 ifsta->aid = aid;
1923 ifsta->ap_capab = capab_info;
1924
1925 kfree(ifsta->assocresp_ies);
1926 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1927 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1928 if (ifsta->assocresp_ies)
1929 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1930
d0709a65
JB		 1931 rcu_read_lock();
1932
f0706e82
JB		 1933 /* Add STA entry for the AP */
1934 sta = sta_info_get(local, ifsta->bssid);
1935 if (!sta) {
1936 struct ieee80211_sta_bss *bss;
73651ee6 1937 int err;
d0709a65 1938
73651ee6
JB		 1939 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1940 if (!sta) {
1941 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1942 " the AP\n", dev->name);
d0709a65 1943 rcu_read_unlock();
f0706e82
JB		 1944 return;
1945 }
65c107ab 1946 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 1947 local->hw.conf.channel->center_freq,
cffdd30d 1948 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1949 if (bss) {
1950 sta->last_rssi = bss->rssi;
1951 sta->last_signal = bss->signal;
1952 sta->last_noise = bss->noise;
1953 ieee80211_rx_bss_put(dev, bss);
1954 }
73651ee6
JB		 1955
1956 err = sta_info_insert(sta);
1957 if (err) {
1958 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1959 " the AP (error %d)\n", dev->name, err);
73651ee6
JB		 1960 rcu_read_unlock();
1961 return;
1962 }
f0706e82
JB		 1963 }
1964
73651ee6
JB		 1965 /*
1966 * FIXME: Do we really need to update the sta_info's information here?
1967 * We already know about the AP (we found it in our list) so it
1968 * should already be filled with the right info, no?
1969 * As is stands, all this is racy because typically we assume
1970 * the information that is filled in here (except flags) doesn't
1971 * change while a STA structure is alive. As such, it should move
1972 * to between the sta_info_alloc() and sta_info_insert() above.
1973 */
1974
238814fd
JB		 1975 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1976 WLAN_STA_AUTHORIZED;
f0706e82
JB		 1977
1978 rates = 0;
8318d78a
JB		 1979 basic_rates = 0;
1980 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1981
f0706e82
JB		 1982 for (i = 0; i < elems.supp_rates_len; i++) {
1983 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1984
1985 if (rate > 110)
1986 have_higher_than_11mbit = true;
1987
1988 for (j = 0; j < sband->n_bitrates; j++) {
1989 if (sband->bitrates[j].bitrate == rate)
f0706e82 1990 rates |= BIT(j);
8318d78a
JB		 1991 if (elems.supp_rates[i] & 0x80)
1992 basic_rates |= BIT(j);
1993 }
f0706e82 1994 }
8318d78a 1995
f0706e82
JB		 1996 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1997 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1998
1999 if (rate > 110)
2000 have_higher_than_11mbit = true;
2001
2002 for (j = 0; j < sband->n_bitrates; j++) {
2003 if (sband->bitrates[j].bitrate == rate)
f0706e82 2004 rates |= BIT(j);
8318d78a
JB		 2005 if (elems.ext_supp_rates[i] & 0x80)
2006 basic_rates |= BIT(j);
2007 }
f0706e82 2008 }
8318d78a
JB		 2009
2010 sta->supp_rates[local->hw.conf.channel->band] = rates;
2011 sdata->basic_rates = basic_rates;
2012
2013 /* cf. IEEE 802.11 9.2.12 */
2014 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2015 have_higher_than_11mbit)
2016 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2017 else
2018 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2019
38668c05 2020 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
d3c990fb 2021 struct ieee80211_ht_bss_info bss_info;
d3c990fb
RR		 2022 ieee80211_ht_cap_ie_to_ht_info(
2023 (struct ieee80211_ht_cap *)
2024 elems.ht_cap_elem, &sta->ht_info);
2025 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2026 (struct ieee80211_ht_addt_info *)
2027 elems.ht_info_elem, &bss_info);
38668c05 2028 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
d3c990fb
RR		 2029 }
2030
f0706e82
JB		 2031 rate_control_rate_init(sta, local);
2032
d6f2da5b 2033 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82 2034 sta->flags |= WLAN_STA_WME;
e5f98f2d 2035 rcu_read_unlock();
f0706e82
JB		 2036 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2037 elems.wmm_param_len);
e5f98f2d
JB		 2038 } else
2039 rcu_read_unlock();
f0706e82 2040
21c0cbe7
TW		 2041 /* set AID and assoc capability,
2042 * ieee80211_set_associated() will tell the driver */
8318d78a 2043 bss_conf->aid = aid;
21c0cbe7 2044 bss_conf->assoc_capability = capab_info;
8318d78a 2045 ieee80211_set_associated(dev, ifsta, 1);
f0706e82 2046
f0706e82
JB		 2047 ieee80211_associated(dev, ifsta);
2048}
2049
2050
2051/* Caller must hold local->sta_bss_lock */
2052static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2053 struct ieee80211_sta_bss *bss)
2054{
2055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 2056 u8 hash_idx;
902acc78
JB		 2057
2058 if (bss_mesh_cfg(bss))
2059 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2060 bss_mesh_id_len(bss));
f709fc69 2061 else
f709fc69 2062 hash_idx = STA_HASH(bss->bssid);
902acc78 2063
f709fc69
LCC		 2064 bss->hnext = local->sta_bss_hash[hash_idx];
2065 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 2066}
2067
2068
2069/* Caller must hold local->sta_bss_lock */
2070static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2071 struct ieee80211_sta_bss *bss)
2072{
2073 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2074 struct ieee80211_sta_bss *b, *prev = NULL;
2075 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2076 while (b) {
2077 if (b == bss) {
2078 if (!prev)
2079 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2080 bss->hnext;
2081 else
2082 prev->hnext = bss->hnext;
2083 break;
2084 }
2085 prev = b;
2086 b = b->hnext;
2087 }
2088}
2089
2090
2091static struct ieee80211_sta_bss *
8318d78a 2092ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2093 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2094{
2095 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2096 struct ieee80211_sta_bss *bss;
2097
dd00cc48 2098 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 2099 if (!bss)
2100 return NULL;
f0706e82
JB		 2101 atomic_inc(&bss->users);
2102 atomic_inc(&bss->users);
2103 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2104 bss->freq = freq;
cffdd30d
JL		 2105 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2106 memcpy(bss->ssid, ssid, ssid_len);
2107 bss->ssid_len = ssid_len;
2108 }
f0706e82
JB		 2109
2110 spin_lock_bh(&local->sta_bss_lock);
2111 /* TODO: order by RSSI? */
2112 list_add_tail(&bss->list, &local->sta_bss_list);
2113 __ieee80211_rx_bss_hash_add(dev, bss);
2114 spin_unlock_bh(&local->sta_bss_lock);
2115 return bss;
2116}
2117
f0706e82 2118static struct ieee80211_sta_bss *
8318d78a 2119ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2120 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2121{
2122 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2123 struct ieee80211_sta_bss *bss;
2124
2125 spin_lock_bh(&local->sta_bss_lock);
2126 bss = local->sta_bss_hash[STA_HASH(bssid)];
2127 while (bss) {
902acc78
JB		 2128 if (!bss_mesh_cfg(bss) &&
2129 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2130 bss->freq == freq &&
cffdd30d
JL		 2131 bss->ssid_len == ssid_len &&
2132 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2133 atomic_inc(&bss->users);
2134 break;
2135 }
2136 bss = bss->hnext;
2137 }
2138 spin_unlock_bh(&local->sta_bss_lock);
2139 return bss;
2140}
2141
f709fc69
LCC		 2142#ifdef CONFIG_MAC80211_MESH
2143static struct ieee80211_sta_bss *
2144ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2145 u8 *mesh_cfg, int freq)
2146{
2147 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2148 struct ieee80211_sta_bss *bss;
2149
2150 spin_lock_bh(&local->sta_bss_lock);
2151 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2152 while (bss) {
902acc78
JB		 2153 if (bss_mesh_cfg(bss) &&
2154 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2155 bss->freq == freq &&
2156 mesh_id_len == bss->mesh_id_len &&
2157 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2158 mesh_id_len))) {
2159 atomic_inc(&bss->users);
2160 break;
2161 }
2162 bss = bss->hnext;
2163 }
2164 spin_unlock_bh(&local->sta_bss_lock);
2165 return bss;
2166}
2167
2168static struct ieee80211_sta_bss *
2169ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
05e5e883 2170 u8 *mesh_cfg, int mesh_config_len, int freq)
f709fc69
LCC		 2171{
2172 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2173 struct ieee80211_sta_bss *bss;
2174
05e5e883
LCC		 2175 if (mesh_config_len != MESH_CFG_LEN)
2176 return NULL;
2177
f709fc69
LCC		 2178 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2179 if (!bss)
2180 return NULL;
2181
24736701 2182 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
f709fc69
LCC		 2183 if (!bss->mesh_cfg) {
2184 kfree(bss);
2185 return NULL;
2186 }
2187
2188 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2189 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2190 if (!bss->mesh_id) {
2191 kfree(bss->mesh_cfg);
2192 kfree(bss);
2193 return NULL;
2194 }
2195 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2196 }
2197
2198 atomic_inc(&bss->users);
2199 atomic_inc(&bss->users);
24736701 2200 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
f709fc69
LCC		 2201 bss->mesh_id_len = mesh_id_len;
2202 bss->freq = freq;
2203 spin_lock_bh(&local->sta_bss_lock);
2204 /* TODO: order by RSSI? */
2205 list_add_tail(&bss->list, &local->sta_bss_list);
2206 __ieee80211_rx_bss_hash_add(dev, bss);
2207 spin_unlock_bh(&local->sta_bss_lock);
2208 return bss;
2209}
2210#endif
f0706e82
JB		 2211
2212static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2213{
2214 kfree(bss->wpa_ie);
2215 kfree(bss->rsn_ie);
2216 kfree(bss->wmm_ie);
c7153508 2217 kfree(bss->ht_ie);
902acc78
JB		 2218 kfree(bss_mesh_id(bss));
2219 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2220 kfree(bss);
2221}
2222
2223
2224static void ieee80211_rx_bss_put(struct net_device *dev,
2225 struct ieee80211_sta_bss *bss)
2226{
2227 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2228 if (!atomic_dec_and_test(&bss->users))
2229 return;
2230
2231 spin_lock_bh(&local->sta_bss_lock);
2232 __ieee80211_rx_bss_hash_del(dev, bss);
2233 list_del(&bss->list);
2234 spin_unlock_bh(&local->sta_bss_lock);
2235 ieee80211_rx_bss_free(bss);
2236}
2237
2238
2239void ieee80211_rx_bss_list_init(struct net_device *dev)
2240{
2241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2242 spin_lock_init(&local->sta_bss_lock);
2243 INIT_LIST_HEAD(&local->sta_bss_list);
2244}
2245
2246
2247void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2248{
2249 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2250 struct ieee80211_sta_bss *bss, *tmp;
2251
2252 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2253 ieee80211_rx_bss_put(dev, bss);
2254}
2255
2256
a607268a
BR		 2257static int ieee80211_sta_join_ibss(struct net_device *dev,
2258 struct ieee80211_if_sta *ifsta,
2259 struct ieee80211_sta_bss *bss)
2260{
2261 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2262 int res, rates, i, j;
2263 struct sk_buff *skb;
2264 struct ieee80211_mgmt *mgmt;
2265 struct ieee80211_tx_control control;
2266 struct rate_selection ratesel;
2267 u8 *pos;
2268 struct ieee80211_sub_if_data *sdata;
2269 struct ieee80211_supported_band *sband;
2270
2271 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2272
9dd6aed0
JB		 2273 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2274
a607268a 2275 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2276 sta_info_flush_delayed(sdata);
a607268a
BR		 2277
2278 if (local->ops->reset_tsf) {
2279 /* Reset own TSF to allow time synchronization work. */
2280 local->ops->reset_tsf(local_to_hw(local));
2281 }
2282 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2283 res = ieee80211_if_config(dev);
2284 if (res)
2285 return res;
2286
2287 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2288
a607268a
BR		 2289 sdata->drop_unencrypted = bss->capability &
2290 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2291
2292 res = ieee80211_set_freq(local, bss->freq);
2293
2294 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2295 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2296 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2297 return -1;
2298 }
2299
2300 /* Set beacon template */
2301 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2302 do {
2303 if (!skb)
2304 break;
2305
2306 skb_reserve(skb, local->hw.extra_tx_headroom);
2307
2308 mgmt = (struct ieee80211_mgmt *)
2309 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2310 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2311 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2312 IEEE80211_STYPE_BEACON);
2313 memset(mgmt->da, 0xff, ETH_ALEN);
2314 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2315 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2316 mgmt->u.beacon.beacon_int =
2317 cpu_to_le16(local->hw.conf.beacon_int);
2318 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2319
2320 pos = skb_put(skb, 2 + ifsta->ssid_len);
2321 *pos++ = WLAN_EID_SSID;
2322 *pos++ = ifsta->ssid_len;
2323 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2324
2325 rates = bss->supp_rates_len;
2326 if (rates > 8)
2327 rates = 8;
2328 pos = skb_put(skb, 2 + rates);
2329 *pos++ = WLAN_EID_SUPP_RATES;
2330 *pos++ = rates;
2331 memcpy(pos, bss->supp_rates, rates);
2332
2333 if (bss->band == IEEE80211_BAND_2GHZ) {
2334 pos = skb_put(skb, 2 + 1);
2335 *pos++ = WLAN_EID_DS_PARAMS;
2336 *pos++ = 1;
2337 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2338 }
2339
2340 pos = skb_put(skb, 2 + 2);
2341 *pos++ = WLAN_EID_IBSS_PARAMS;
2342 *pos++ = 2;
2343 /* FIX: set ATIM window based on scan results */
2344 *pos++ = 0;
2345 *pos++ = 0;
2346
2347 if (bss->supp_rates_len > 8) {
2348 rates = bss->supp_rates_len - 8;
2349 pos = skb_put(skb, 2 + rates);
2350 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2351 *pos++ = rates;
2352 memcpy(pos, &bss->supp_rates[8], rates);
2353 }
2354
2355 memset(&control, 0, sizeof(control));
2356 rate_control_get_rate(dev, sband, skb, &ratesel);
2357 if (!ratesel.rate) {
2358 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2359 "for IBSS beacon\n", dev->name);
2360 break;
2361 }
2362 control.vif = &sdata->vif;
2363 control.tx_rate = ratesel.rate;
2364 if (sdata->bss_conf.use_short_preamble &&
2365 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2366 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2367 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2368 control.flags |= IEEE80211_TXCTL_NO_ACK;
2369 control.retry_limit = 1;
2370
2371 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2372 if (ifsta->probe_resp) {
2373 mgmt = (struct ieee80211_mgmt *)
2374 ifsta->probe_resp->data;
2375 mgmt->frame_control =
2376 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2377 IEEE80211_STYPE_PROBE_RESP);
2378 } else {
2379 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2380 "template for IBSS\n", dev->name);
2381 }
2382
2383 if (local->ops->beacon_update &&
2384 local->ops->beacon_update(local_to_hw(local),
2385 skb, &control) == 0) {
2386 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2387 "template\n", dev->name);
2388 skb = NULL;
2389 }
2390
2391 rates = 0;
2392 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2393 for (i = 0; i < bss->supp_rates_len; i++) {
2394 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2395 for (j = 0; j < sband->n_bitrates; j++)
2396 if (sband->bitrates[j].bitrate == bitrate)
2397 rates |= BIT(j);
2398 }
2399 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
e2839d8f
VK		 2400
2401 ieee80211_sta_def_wmm_params(dev, bss, 1);
a607268a
BR		 2402 } while (0);
2403
2404 if (skb) {
2405 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2406 "template\n", dev->name);
2407 dev_kfree_skb(skb);
2408 }
2409
2410 ifsta->state = IEEE80211_IBSS_JOINED;
2411 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2412
2413 ieee80211_rx_bss_put(dev, bss);
2414
2415 return res;
2416}
2417
f709fc69
LCC		 2418u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2419 struct ieee802_11_elems *elems,
2420 enum ieee80211_band band)
2421{
2422 struct ieee80211_supported_band *sband;
2423 struct ieee80211_rate *bitrates;
2424 size_t num_rates;
2425 u64 supp_rates;
2426 int i, j;
2427 sband = local->hw.wiphy->bands[band];
2428
2429 if (!sband) {
2430 WARN_ON(1);
2431 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2432 }
2433
2434 bitrates = sband->bitrates;
2435 num_rates = sband->n_bitrates;
2436 supp_rates = 0;
2437 for (i = 0; i < elems->supp_rates_len +
2438 elems->ext_supp_rates_len; i++) {
2439 u8 rate = 0;
2440 int own_rate;
2441 if (i < elems->supp_rates_len)
2442 rate = elems->supp_rates[i];
2443 else if (elems->ext_supp_rates)
2444 rate = elems->ext_supp_rates
2445 [i - elems->supp_rates_len];
2446 own_rate = 5 * (rate & 0x7f);
2447 for (j = 0; j < num_rates; j++)
2448 if (bitrates[j].bitrate == own_rate)
2449 supp_rates |= BIT(j);
2450 }
2451 return supp_rates;
2452}
2453
a607268a 2454
f0706e82
JB		 2455static void ieee80211_rx_bss_info(struct net_device *dev,
2456 struct ieee80211_mgmt *mgmt,
2457 size_t len,
2458 struct ieee80211_rx_status *rx_status,
2459 int beacon)
2460{
2461 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2462 struct ieee802_11_elems elems;
2463 size_t baselen;
8318d78a 2464 int freq, clen;
f0706e82
JB		 2465 struct ieee80211_sta_bss *bss;
2466 struct sta_info *sta;
2467 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2468 u64 beacon_timestamp, rx_timestamp;
fab7d4a2 2469 struct ieee80211_channel *channel;
0795af57
JP		 2470 DECLARE_MAC_BUF(mac);
2471 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2472
2473 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2474 return; /* ignore ProbeResp to foreign address */
2475
2476#if 0
0795af57 2477 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2478 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2479 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2480#endif
2481
2482 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2483 if (baselen > len)
2484 return;
2485
9d9bf77d 2486 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
67a4cce4 2487 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2488
902acc78
JB		 2489 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2490 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2491 u64 rates = ieee80211_sta_get_rates(local, &elems,
2492 rx_status->band);
2493
2494 mesh_neighbour_update(mgmt->sa, rates, dev,
2495 mesh_peer_accepts_plinks(&elems, dev));
2496 }
f709fc69 2497
d0709a65
JB		 2498 rcu_read_lock();
2499
51fb61e7 2500 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2501 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2502 (sta = sta_info_get(local, mgmt->sa))) {
f709fc69
LCC		 2503 u64 prev_rates;
2504 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2505 rx_status->band);
f0706e82 2506
8318d78a
JB		 2507 prev_rates = sta->supp_rates[rx_status->band];
2508 sta->supp_rates[rx_status->band] &= supp_rates;
2509 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2510 /* No matching rates - this should not really happen.
2511 * Make sure that at least one rate is marked
2512 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2513 sta->supp_rates[rx_status->band] =
2514 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2515 }
8318d78a 2516 if (sta->supp_rates[rx_status->band] != prev_rates) {
f0706e82 2517 printk(KERN_DEBUG "%s: updated supp_rates set for "
8318d78a
JB		 2518 "%s based on beacon info (0x%llx & 0x%llx -> "
2519 "0x%llx)\n",
2520 dev->name, print_mac(mac, sta->addr),
2521 (unsigned long long) prev_rates,
2522 (unsigned long long) supp_rates,
2523 (unsigned long long) sta->supp_rates[rx_status->band]);
f0706e82 2524 }
f0706e82
JB		 2525 }
2526
d0709a65
JB		 2527 rcu_read_unlock();
2528
f0706e82 2529 if (elems.ds_params && elems.ds_params_len == 1)
8318d78a 2530 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
f0706e82 2531 else
8318d78a 2532 freq = rx_status->freq;
f0706e82 2533
fab7d4a2
JB		 2534 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2535
2536 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2537 return;
2538
f709fc69
LCC		 2539#ifdef CONFIG_MAC80211_MESH
2540 if (elems.mesh_config)
2541 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2542 elems.mesh_id_len, elems.mesh_config, freq);
2543 else
2544#endif
2545 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
cffdd30d 2546 elems.ssid, elems.ssid_len);
f709fc69
LCC		 2547 if (!bss) {
2548#ifdef CONFIG_MAC80211_MESH
2549 if (elems.mesh_config)
2550 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
05e5e883
LCC		 2551 elems.mesh_id_len, elems.mesh_config,
2552 elems.mesh_config_len, freq);
f709fc69
LCC		 2553 else
2554#endif
2555 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2556 elems.ssid, elems.ssid_len);
f0706e82
JB		 2557 if (!bss)
2558 return;
2559 } else {
2560#if 0
2561 /* TODO: order by RSSI? */
2562 spin_lock_bh(&local->sta_bss_lock);
2563 list_move_tail(&bss->list, &local->sta_bss_list);
2564 spin_unlock_bh(&local->sta_bss_lock);
2565#endif
2566 }
2567
8318d78a
JB		 2568 bss->band = rx_status->band;
2569
9d9bf77d
BR		 2570 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2571 bss->probe_resp && beacon) {
2572 /* STA mode:
2573 * Do not allow beacon to override data from Probe Response. */
f0706e82
JB		 2574 ieee80211_rx_bss_put(dev, bss);
2575 return;
2576 }
2577
5628221c
DD		 2578 /* save the ERP value so that it is available at association time */
2579 if (elems.erp_info && elems.erp_info_len >= 1) {
2580 bss->erp_value = elems.erp_info[0];
2581 bss->has_erp_value = 1;
2582 }
2583
f0706e82
JB		 2584 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2585 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2586
2587 bss->supp_rates_len = 0;
2588 if (elems.supp_rates) {
2589 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2590 if (clen > elems.supp_rates_len)
2591 clen = elems.supp_rates_len;
2592 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2593 clen);
2594 bss->supp_rates_len += clen;
2595 }
2596 if (elems.ext_supp_rates) {
2597 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2598 if (clen > elems.ext_supp_rates_len)
2599 clen = elems.ext_supp_rates_len;
2600 memcpy(&bss->supp_rates[bss->supp_rates_len],
2601 elems.ext_supp_rates, clen);
2602 bss->supp_rates_len += clen;
2603 }
2604
2605 if (elems.wpa &&
2606 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2607 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2608 kfree(bss->wpa_ie);
2609 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2610 if (bss->wpa_ie) {
2611 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2612 bss->wpa_ie_len = elems.wpa_len + 2;
2613 } else
2614 bss->wpa_ie_len = 0;
2615 } else if (!elems.wpa && bss->wpa_ie) {
2616 kfree(bss->wpa_ie);
2617 bss->wpa_ie = NULL;
2618 bss->wpa_ie_len = 0;
2619 }
2620
2621 if (elems.rsn &&
2622 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2623 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2624 kfree(bss->rsn_ie);
2625 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2626 if (bss->rsn_ie) {
2627 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2628 bss->rsn_ie_len = elems.rsn_len + 2;
2629 } else
2630 bss->rsn_ie_len = 0;
2631 } else if (!elems.rsn && bss->rsn_ie) {
2632 kfree(bss->rsn_ie);
2633 bss->rsn_ie = NULL;
2634 bss->rsn_ie_len = 0;
2635 }
2636
2637 if (elems.wmm_param &&
2638 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2639 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2640 kfree(bss->wmm_ie);
2641 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2642 if (bss->wmm_ie) {
2643 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2644 elems.wmm_param_len + 2);
2645 bss->wmm_ie_len = elems.wmm_param_len + 2;
2646 } else
2647 bss->wmm_ie_len = 0;
2648 } else if (!elems.wmm_param && bss->wmm_ie) {
2649 kfree(bss->wmm_ie);
2650 bss->wmm_ie = NULL;
2651 bss->wmm_ie_len = 0;
2652 }
c7153508
RR		 2653 if (elems.ht_cap_elem &&
2654 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2655 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2656 kfree(bss->ht_ie);
2657 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2658 if (bss->ht_ie) {
2659 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2660 elems.ht_cap_elem_len + 2);
2661 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2662 } else
2663 bss->ht_ie_len = 0;
2664 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2665 kfree(bss->ht_ie);
2666 bss->ht_ie = NULL;
2667 bss->ht_ie_len = 0;
2668 }
f0706e82 2669
9d9bf77d 2670 bss->timestamp = beacon_timestamp;
f0706e82
JB		 2671 bss->last_update = jiffies;
2672 bss->rssi = rx_status->ssi;
2673 bss->signal = rx_status->signal;
2674 bss->noise = rx_status->noise;
2675 if (!beacon)
2676 bss->probe_resp++;
9d9bf77d
BR		 2677
2678 /* check if we need to merge IBSS */
2679 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2680 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2681 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d
BR		 2682 bss->freq == local->oper_channel->center_freq &&
2683 elems.ssid_len == sdata->u.sta.ssid_len &&
2684 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2685 if (rx_status->flag & RX_FLAG_TSFT) {
2686 /* in order for correct IBSS merging we need mactime
2687 *
2688 * since mactime is defined as the time the first data
2689 * symbol of the frame hits the PHY, and the timestamp
2690 * of the beacon is defined as "the time that the data
2691 * symbol containing the first bit of the timestamp is
2692 * transmitted to the PHY plus the transmitting STA’s
2693 * delays through its local PHY from the MAC-PHY
2694 * interface to its interface with the WM"
2695 * (802.11 11.1.2) - equals the time this bit arrives at
2696 * the receiver - we have to take into account the
2697 * offset between the two.
2698 * e.g: at 1 MBit that means mactime is 192 usec earlier
2699 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2700 */
2701 int rate = local->hw.wiphy->bands[rx_status->band]->
2702 bitrates[rx_status->rate_idx].bitrate;
2703 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2704 } else if (local && local->ops && local->ops->get_tsf)
2705 /* second best option: get current TSF */
2706 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2707 else
2708 /* can't merge without knowing the TSF */
2709 rx_timestamp = -1LLU;
2710#ifdef CONFIG_MAC80211_IBSS_DEBUG
2711 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2712 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2713 print_mac(mac, mgmt->sa),
2714 print_mac(mac2, mgmt->bssid),
2715 (unsigned long long)rx_timestamp,
2716 (unsigned long long)beacon_timestamp,
2717 (unsigned long long)(rx_timestamp - beacon_timestamp),
2718 jiffies);
2719#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2720 if (beacon_timestamp > rx_timestamp) {
fba4a1e6 2721#ifndef CONFIG_MAC80211_IBSS_DEBUG
d97cf015 2722 if (net_ratelimit())
fba4a1e6 2723#endif
9d9bf77d
BR		 2724 printk(KERN_DEBUG "%s: beacon TSF higher than "
2725 "local TSF - IBSS merge with BSSID %s\n",
2726 dev->name, print_mac(mac, mgmt->bssid));
2727 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2728 ieee80211_ibss_add_sta(dev, NULL,
2729 mgmt->bssid, mgmt->sa);
2730 }
2731 }
2732
f0706e82
JB		 2733 ieee80211_rx_bss_put(dev, bss);
2734}
2735
2736
2737static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2738 struct ieee80211_mgmt *mgmt,
2739 size_t len,
2740 struct ieee80211_rx_status *rx_status)
2741{
2742 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2743}
2744
2745
2746static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2747 struct ieee80211_mgmt *mgmt,
2748 size_t len,
2749 struct ieee80211_rx_status *rx_status)
2750{
f0706e82
JB		 2751 struct ieee80211_sub_if_data *sdata;
2752 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2753 size_t baselen;
2754 struct ieee802_11_elems elems;
d3c990fb
RR		 2755 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2756 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2757 u32 changed = 0;
f0706e82
JB		 2758
2759 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2760
2761 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2762 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2763 return;
2764 ifsta = &sdata->u.sta;
2765
d6f2da5b 2766 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2767 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2768 return;
2769
2770 /* Process beacon from the current BSS */
2771 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2772 if (baselen > len)
2773 return;
2774
67a4cce4 2775 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2776
5628221c 2777 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2778 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
f0706e82 2779
d3c990fb 2780 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2781 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2782 struct ieee80211_ht_bss_info bss_info;
2783
2784 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2785 (struct ieee80211_ht_addt_info *)
2786 elems.ht_info_elem, &bss_info);
38668c05
TW		 2787 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2788 &bss_info);
d3c990fb
RR		 2789 }
2790
d6f2da5b 2791 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2792 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2793 elems.wmm_param_len);
2794 }
471b3efd
JB		 2795
2796 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2797}
2798
2799
2800static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2801 struct ieee80211_if_sta *ifsta,
2802 struct ieee80211_mgmt *mgmt,
2803 size_t len,
2804 struct ieee80211_rx_status *rx_status)
2805{
2806 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2807 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2808 int tx_last_beacon;
2809 struct sk_buff *skb;
2810 struct ieee80211_mgmt *resp;
2811 u8 *pos, *end;
0795af57
JP		 2812 DECLARE_MAC_BUF(mac);
2813#ifdef CONFIG_MAC80211_IBSS_DEBUG
2814 DECLARE_MAC_BUF(mac2);
2815 DECLARE_MAC_BUF(mac3);
2816#endif
f0706e82 2817
51fb61e7 2818 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2819 ifsta->state != IEEE80211_IBSS_JOINED ||
2820 len < 24 + 2 || !ifsta->probe_resp)
2821 return;
2822
2823 if (local->ops->tx_last_beacon)
2824 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2825 else
2826 tx_last_beacon = 1;
2827
2828#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2829 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2830 "%s (tx_last_beacon=%d)\n",
2831 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2832 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2833#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2834
2835 if (!tx_last_beacon)
2836 return;
2837
2838 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2839 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2840 return;
2841
2842 end = ((u8 *) mgmt) + len;
2843 pos = mgmt->u.probe_req.variable;
2844 if (pos[0] != WLAN_EID_SSID ||
2845 pos + 2 + pos[1] > end) {
2846 if (net_ratelimit()) {
2847 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2848 "from %s\n",
2849 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2850 }
2851 return;
2852 }
2853 if (pos[1] != 0 &&
2854 (pos[1] != ifsta->ssid_len ||
2855 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2856 /* Ignore ProbeReq for foreign SSID */
2857 return;
2858 }
2859
2860 /* Reply with ProbeResp */
0ec0b7ac 2861 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2862 if (!skb)
2863 return;
2864
2865 resp = (struct ieee80211_mgmt *) skb->data;
2866 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2867#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2868 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2869 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2870#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2871 ieee80211_sta_tx(dev, skb, 0);
2872}
2873
4e20cb29
JB		 2874static void ieee80211_rx_mgmt_action(struct net_device *dev,
2875 struct ieee80211_if_sta *ifsta,
2876 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2877 size_t len,
2878 struct ieee80211_rx_status *rx_status)
9f985b0e 2879{
f709fc69 2880 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f709fc69 2881
9f985b0e
RR		 2882 if (len < IEEE80211_MIN_ACTION_SIZE)
2883 return;
2884
2885 switch (mgmt->u.action.category) {
2886 case WLAN_CATEGORY_BACK:
2887 switch (mgmt->u.action.u.addba_req.action_code) {
2888 case WLAN_ACTION_ADDBA_REQ:
2889 if (len < (IEEE80211_MIN_ACTION_SIZE +
2890 sizeof(mgmt->u.action.u.addba_req)))
2891 break;
2892 ieee80211_sta_process_addba_request(dev, mgmt, len);
2893 break;
eadc8d9e
RR		 2894 case WLAN_ACTION_ADDBA_RESP:
2895 if (len < (IEEE80211_MIN_ACTION_SIZE +
2896 sizeof(mgmt->u.action.u.addba_resp)))
2897 break;
2898 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2899 break;
688b88a4
RR		 2900 case WLAN_ACTION_DELBA:
2901 if (len < (IEEE80211_MIN_ACTION_SIZE +
2902 sizeof(mgmt->u.action.u.delba)))
2903 break;
2904 ieee80211_sta_process_delba(dev, mgmt, len);
2905 break;
9f985b0e
RR		 2906 default:
2907 if (net_ratelimit())
688b88a4 2908 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2909 dev->name);
2910 break;
2911 }
2912 break;
f709fc69 2913 case PLINK_CATEGORY:
902acc78 2914 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2915 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2916 break;
f709fc69 2917 case MESH_PATH_SEL_CATEGORY:
902acc78 2918 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2919 mesh_rx_path_sel_frame(dev, mgmt, len);
2920 break;
9f985b0e 2921 default:
f709fc69
LCC		 2922 if (net_ratelimit())
2923 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2924 "category=%d\n", dev->name, mgmt->u.action.category);
9f985b0e
RR		 2925 break;
2926 }
2927}
f0706e82
JB		 2928
2929void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2930 struct ieee80211_rx_status *rx_status)
2931{
2932 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2933 struct ieee80211_sub_if_data *sdata;
2934 struct ieee80211_if_sta *ifsta;
2935 struct ieee80211_mgmt *mgmt;
2936 u16 fc;
2937
2938 if (skb->len < 24)
2939 goto fail;
2940
2941 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2942 ifsta = &sdata->u.sta;
2943
2944 mgmt = (struct ieee80211_mgmt *) skb->data;
2945 fc = le16_to_cpu(mgmt->frame_control);
2946
2947 switch (fc & IEEE80211_FCTL_STYPE) {
2948 case IEEE80211_STYPE_PROBE_REQ:
2949 case IEEE80211_STYPE_PROBE_RESP:
2950 case IEEE80211_STYPE_BEACON:
f709fc69 2951 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2952 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2953 case IEEE80211_STYPE_AUTH:
2954 case IEEE80211_STYPE_ASSOC_RESP:
2955 case IEEE80211_STYPE_REASSOC_RESP:
2956 case IEEE80211_STYPE_DEAUTH:
2957 case IEEE80211_STYPE_DISASSOC:
2958 skb_queue_tail(&ifsta->skb_queue, skb);
2959 queue_work(local->hw.workqueue, &ifsta->work);
2960 return;
2961 default:
2962 printk(KERN_DEBUG "%s: received unknown management frame - "
2963 "stype=%d\n", dev->name,
2964 (fc & IEEE80211_FCTL_STYPE) >> 4);
2965 break;
2966 }
2967
2968 fail:
2969 kfree_skb(skb);
2970}
2971
2972
2973static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2974 struct sk_buff *skb)
2975{
2976 struct ieee80211_rx_status *rx_status;
2977 struct ieee80211_sub_if_data *sdata;
2978 struct ieee80211_if_sta *ifsta;
2979 struct ieee80211_mgmt *mgmt;
2980 u16 fc;
2981
2982 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2983 ifsta = &sdata->u.sta;
2984
2985 rx_status = (struct ieee80211_rx_status *) skb->cb;
2986 mgmt = (struct ieee80211_mgmt *) skb->data;
2987 fc = le16_to_cpu(mgmt->frame_control);
2988
2989 switch (fc & IEEE80211_FCTL_STYPE) {
2990 case IEEE80211_STYPE_PROBE_REQ:
2991 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2992 rx_status);
2993 break;
2994 case IEEE80211_STYPE_PROBE_RESP:
2995 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2996 break;
2997 case IEEE80211_STYPE_BEACON:
2998 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2999 break;
3000 case IEEE80211_STYPE_AUTH:
3001 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3002 break;
3003 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 3004 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 3005 break;
3006 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 3007 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 3008 break;
3009 case IEEE80211_STYPE_DEAUTH:
3010 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3011 break;
3012 case IEEE80211_STYPE_DISASSOC:
3013 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3014 break;
9f985b0e 3015 case IEEE80211_STYPE_ACTION:
f709fc69 3016 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
9f985b0e 3017 break;
f0706e82
JB		 3018 }
3019
3020 kfree_skb(skb);
3021}
3022
3023
9ae54c84 3024ieee80211_rx_result
ece8eddd
ZY		 3025ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3026 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 3027{
3028 struct ieee80211_mgmt *mgmt;
3029 u16 fc;
3030
ece8eddd 3031 if (skb->len < 2)
e4c26add 3032 return RX_DROP_UNUSABLE;
f0706e82
JB		 3033
3034 mgmt = (struct ieee80211_mgmt *) skb->data;
3035 fc = le16_to_cpu(mgmt->frame_control);
3036
ece8eddd 3037 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
9ae54c84 3038 return RX_CONTINUE;
ece8eddd
ZY		 3039
3040 if (skb->len < 24)
e4c26add 3041 return RX_DROP_MONITOR;
ece8eddd 3042
f0706e82
JB		 3043 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3044 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3045 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3046 skb->len, rx_status);
ece8eddd 3047 dev_kfree_skb(skb);
9ae54c84 3048 return RX_QUEUED;
f0706e82
JB		 3049 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3050 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3051 rx_status);
ece8eddd 3052 dev_kfree_skb(skb);
9ae54c84 3053 return RX_QUEUED;
f0706e82
JB		 3054 }
3055 }
9ae54c84 3056 return RX_CONTINUE;
f0706e82
JB		 3057}
3058
3059
3060static int ieee80211_sta_active_ibss(struct net_device *dev)
3061{
3062 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3063 int active = 0;
3064 struct sta_info *sta;
d0709a65 3065 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3066
d0709a65
JB		 3067 rcu_read_lock();
3068
3069 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3070 if (sta->sdata == sdata &&
f0706e82
JB		 3071 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3072 jiffies)) {
3073 active++;
3074 break;
3075 }
3076 }
d0709a65
JB		 3077
3078 rcu_read_unlock();
f0706e82
JB		 3079
3080 return active;
3081}
3082
3083
f709fc69 3084static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
f0706e82
JB		 3085{
3086 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3087 struct sta_info *sta, *tmp;
be8755e1 3088 LIST_HEAD(tmp_list);
0795af57 3089 DECLARE_MAC_BUF(mac);
d0709a65 3090 unsigned long flags;
f0706e82 3091
d0709a65 3092 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3093 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3094 if (time_after(jiffies, sta->last_rx + exp_time)) {
0795af57
JP		 3095 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3096 dev->name, print_mac(mac, sta->addr));
cb585bcc 3097 __sta_info_unlink(&sta);
d0709a65
JB		 3098 if (sta)
3099 list_add(&sta->list, &tmp_list);
f0706e82 3100 }
d0709a65 3101 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3102
d0709a65
JB		 3103 synchronize_rcu();
3104
3105 rtnl_lock();
3106 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3107 sta_info_destroy(sta);
3108 rtnl_unlock();
f0706e82
JB		 3109}
3110
3111
3112static void ieee80211_sta_merge_ibss(struct net_device *dev,
3113 struct ieee80211_if_sta *ifsta)
3114{
3115 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3116
f709fc69 3117 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
f0706e82
JB		 3118 if (ieee80211_sta_active_ibss(dev))
3119 return;
3120
3121 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3122 "IBSS networks with same SSID (merge)\n", dev->name);
3123 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3124}
3125
3126
f709fc69
LCC		 3127#ifdef CONFIG_MAC80211_MESH
3128static void ieee80211_mesh_housekeeping(struct net_device *dev,
3129 struct ieee80211_if_sta *ifsta)
3130{
3131 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3132 bool free_plinks;
3133
3134 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3135 mesh_path_expire(dev);
3136
3137 free_plinks = mesh_plink_availables(sdata);
3138 if (free_plinks != sdata->u.sta.accepting_plinks)
3139 ieee80211_if_config_beacon(dev);
3140
3141 mod_timer(&ifsta->timer, jiffies +
3142 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3143}
3144
3145
3146void ieee80211_start_mesh(struct net_device *dev)
3147{
3148 struct ieee80211_if_sta *ifsta;
3149 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3150 ifsta = &sdata->u.sta;
3151 ifsta->state = IEEE80211_MESH_UP;
3152 ieee80211_sta_timer((unsigned long)sdata);
3153}
3154#endif
3155
3156
f0706e82
JB		 3157void ieee80211_sta_timer(unsigned long data)
3158{
3159 struct ieee80211_sub_if_data *sdata =
3160 (struct ieee80211_sub_if_data *) data;
3161 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3162 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3163
3164 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3165 queue_work(local->hw.workqueue, &ifsta->work);
3166}
3167
f0706e82
JB		 3168void ieee80211_sta_work(struct work_struct *work)
3169{
3170 struct ieee80211_sub_if_data *sdata =
3171 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3172 struct net_device *dev = sdata->dev;
3173 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3174 struct ieee80211_if_sta *ifsta;
3175 struct sk_buff *skb;
3176
3177 if (!netif_running(dev))
3178 return;
3179
ece8eddd 3180 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3181 return;
3182
51fb61e7 3183 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
f709fc69
LCC		 3184 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3185 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
f0706e82 3186 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 3187 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 3188 return;
3189 }
3190 ifsta = &sdata->u.sta;
3191
3192 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3193 ieee80211_sta_rx_queued_mgmt(dev, skb);
3194
f709fc69 3195#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3196 if (ifsta->preq_queue_len &&
3197 time_after(jiffies,
3198 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f709fc69
LCC		 3199 mesh_path_start_discovery(dev);
3200#endif
3201
f0706e82
JB		 3202 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3203 ifsta->state != IEEE80211_ASSOCIATE &&
3204 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 3205 if (ifsta->scan_ssid_len)
3206 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3207 else
3208 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 3209 return;
3210 }
3211
3212 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3213 if (ieee80211_sta_config_auth(dev, ifsta))
3214 return;
3215 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3216 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3217 return;
3218
3219 switch (ifsta->state) {
3220 case IEEE80211_DISABLED:
3221 break;
3222 case IEEE80211_AUTHENTICATE:
3223 ieee80211_authenticate(dev, ifsta);
3224 break;
3225 case IEEE80211_ASSOCIATE:
3226 ieee80211_associate(dev, ifsta);
3227 break;
3228 case IEEE80211_ASSOCIATED:
3229 ieee80211_associated(dev, ifsta);
3230 break;
3231 case IEEE80211_IBSS_SEARCH:
3232 ieee80211_sta_find_ibss(dev, ifsta);
3233 break;
3234 case IEEE80211_IBSS_JOINED:
3235 ieee80211_sta_merge_ibss(dev, ifsta);
3236 break;
f709fc69
LCC		 3237#ifdef CONFIG_MAC80211_MESH
3238 case IEEE80211_MESH_UP:
3239 ieee80211_mesh_housekeeping(dev, ifsta);
3240 break;
3241#endif
f0706e82
JB		 3242 default:
3243 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3244 ifsta->state);
3245 break;
3246 }
3247
3248 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3249 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3250 "mixed-cell disabled - disassociate\n", dev->name);
3251
3252 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3253 ieee80211_set_disassoc(dev, ifsta, 0);
3254 }
3255}
3256
3257
3258static void ieee80211_sta_reset_auth(struct net_device *dev,
3259 struct ieee80211_if_sta *ifsta)
3260{
3261 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3262
3263 if (local->ops->reset_tsf) {
3264 /* Reset own TSF to allow time synchronization work. */
3265 local->ops->reset_tsf(local_to_hw(local));
3266 }
3267
3268 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3269
3270
3271 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3272 ifsta->auth_alg = WLAN_AUTH_OPEN;
3273 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3274 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3275 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3276 ifsta->auth_alg = WLAN_AUTH_LEAP;
3277 else
3278 ifsta->auth_alg = WLAN_AUTH_OPEN;
3279 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3280 ifsta->auth_alg);
3281 ifsta->auth_transaction = -1;
d6f2da5b
JS		 3282 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3283 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 3284 netif_carrier_off(dev);
3285}
3286
3287
3288void ieee80211_sta_req_auth(struct net_device *dev,
3289 struct ieee80211_if_sta *ifsta)
3290{
3291 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3292 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3293
51fb61e7 3294 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3295 return;
3296
d6f2da5b
JS		 3297 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3298 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3299 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3300 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3301 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3302 queue_work(local->hw.workqueue, &ifsta->work);
3303 }
3304}
3305
3306static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3307 const char *ssid, int ssid_len)
3308{
3309 int tmp, hidden_ssid;
3310
48225709
MW		 3311 if (ssid_len == ifsta->ssid_len &&
3312 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3313 return 1;
3314
d6f2da5b 3315 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3316 return 0;
3317
3318 hidden_ssid = 1;
3319 tmp = ssid_len;
3320 while (tmp--) {
3321 if (ssid[tmp] != '\0') {
3322 hidden_ssid = 0;
3323 break;
3324 }
3325 }
3326
3327 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3328 return 1;
3329
3330 if (ssid_len == 1 && ssid[0] == ' ')
3331 return 1;
3332
3333 return 0;
3334}
3335
3336static int ieee80211_sta_config_auth(struct net_device *dev,
3337 struct ieee80211_if_sta *ifsta)
3338{
3339 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3340 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3341 struct ieee80211_sta_bss *bss, *selected = NULL;
3342 int top_rssi = 0, freq;
3343
d6f2da5b
JS		 3344 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3345 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 3346 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3347 ieee80211_sta_reset_auth(dev, ifsta);
3348 return 0;
3349 }
3350
3351 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3352 freq = local->oper_channel->center_freq;
f0706e82
JB		 3353 list_for_each_entry(bss, &local->sta_bss_list, list) {
3354 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3355 continue;
3356
3357 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3358 !!sdata->default_key)
3359 continue;
3360
d6f2da5b
JS		 3361 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3362 bss->freq != freq)
f0706e82
JB		 3363 continue;
3364
d6f2da5b 3365 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3366 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3367 continue;
3368
d6f2da5b 3369 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3370 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3371 continue;
3372
3373 if (!selected || top_rssi < bss->rssi) {
3374 selected = bss;
3375 top_rssi = bss->rssi;
3376 }
3377 }
3378 if (selected)
3379 atomic_inc(&selected->users);
3380 spin_unlock_bh(&local->sta_bss_lock);
3381
3382 if (selected) {
8318d78a 3383 ieee80211_set_freq(local, selected->freq);
d6f2da5b 3384 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3385 ieee80211_sta_set_ssid(dev, selected->ssid,
3386 selected->ssid_len);
3387 ieee80211_sta_set_bssid(dev, selected->bssid);
e2839d8f 3388 ieee80211_sta_def_wmm_params(dev, selected, 0);
f0706e82
JB		 3389 ieee80211_rx_bss_put(dev, selected);
3390 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3391 ieee80211_sta_reset_auth(dev, ifsta);
3392 return 0;
3393 } else {
3394 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3395 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3396 ieee80211_sta_start_scan(dev, NULL, 0);
3397 else
3398 ieee80211_sta_start_scan(dev, ifsta->ssid,
3399 ifsta->ssid_len);
f0706e82
JB		 3400 ifsta->state = IEEE80211_AUTHENTICATE;
3401 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3402 } else
3403 ifsta->state = IEEE80211_DISABLED;
3404 }
f0706e82
JB		 3405 return -1;
3406}
3407
f0706e82
JB		 3408
3409static int ieee80211_sta_create_ibss(struct net_device *dev,
3410 struct ieee80211_if_sta *ifsta)
3411{
3412 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3413 struct ieee80211_sta_bss *bss;
cffdd30d 3414 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3415 struct ieee80211_supported_band *sband;
f0706e82
JB		 3416 u8 bssid[ETH_ALEN], *pos;
3417 int i;
0795af57 3418 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3419
3420#if 0
3421 /* Easier testing, use fixed BSSID. */
3422 memset(bssid, 0xfe, ETH_ALEN);
3423#else
3424 /* Generate random, not broadcast, locally administered BSSID. Mix in
3425 * own MAC address to make sure that devices that do not have proper
3426 * random number generator get different BSSID. */
3427 get_random_bytes(bssid, ETH_ALEN);
3428 for (i = 0; i < ETH_ALEN; i++)
3429 bssid[i] ^= dev->dev_addr[i];
3430 bssid[0] &= ~0x01;
3431 bssid[0] |= 0x02;
3432#endif
3433
0795af57
JP		 3434 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3435 dev->name, print_mac(mac, bssid));
f0706e82 3436
8318d78a
JB		 3437 bss = ieee80211_rx_bss_add(dev, bssid,
3438 local->hw.conf.channel->center_freq,
cffdd30d 3439 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3440 if (!bss)
3441 return -ENOMEM;
3442
8318d78a
JB		 3443 bss->band = local->hw.conf.channel->band;
3444 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3445
3446 if (local->hw.conf.beacon_int == 0)
f709fc69 3447 local->hw.conf.beacon_int = 10000;
f0706e82 3448 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3449 bss->last_update = jiffies;
3450 bss->capability = WLAN_CAPABILITY_IBSS;
3451 if (sdata->default_key) {
3452 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3453 } else
3454 sdata->drop_unencrypted = 0;
8318d78a 3455 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3456 pos = bss->supp_rates;
8318d78a
JB		 3457 for (i = 0; i < sband->n_bitrates; i++) {
3458 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3459 *pos++ = (u8) (rate / 5);
3460 }
3461
3462 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3463}
3464
3465
3466static int ieee80211_sta_find_ibss(struct net_device *dev,
3467 struct ieee80211_if_sta *ifsta)
3468{
3469 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3470 struct ieee80211_sta_bss *bss;
3471 int found = 0;
3472 u8 bssid[ETH_ALEN];
3473 int active_ibss;
0795af57
JP		 3474 DECLARE_MAC_BUF(mac);
3475 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3476
3477 if (ifsta->ssid_len == 0)
3478 return -EINVAL;
3479
3480 active_ibss = ieee80211_sta_active_ibss(dev);
3481#ifdef CONFIG_MAC80211_IBSS_DEBUG
3482 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3483 dev->name, active_ibss);
3484#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3485 spin_lock_bh(&local->sta_bss_lock);
3486 list_for_each_entry(bss, &local->sta_bss_list, list) {
3487 if (ifsta->ssid_len != bss->ssid_len ||
3488 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3489 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3490 continue;
3491#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3492 printk(KERN_DEBUG " bssid=%s found\n",
3493 print_mac(mac, bss->bssid));
f0706e82
JB		 3494#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3495 memcpy(bssid, bss->bssid, ETH_ALEN);
3496 found = 1;
3497 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3498 break;
3499 }
3500 spin_unlock_bh(&local->sta_bss_lock);
3501
3502#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3503 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3504 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3505#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3506 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3507 (bss = ieee80211_rx_bss_get(dev, bssid,
3508 local->hw.conf.channel->center_freq,
cffdd30d 3509 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3510 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3511 " based on configured SSID\n",
0795af57 3512 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3513 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3514 }
3515#ifdef CONFIG_MAC80211_IBSS_DEBUG
3516 printk(KERN_DEBUG " did not try to join ibss\n");
3517#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3518
3519 /* Selected IBSS not found in current scan results - try to scan */
3520 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3521 !ieee80211_sta_active_ibss(dev)) {
3522 mod_timer(&ifsta->timer, jiffies +
3523 IEEE80211_IBSS_MERGE_INTERVAL);
3524 } else if (time_after(jiffies, local->last_scan_completed +
3525 IEEE80211_SCAN_INTERVAL)) {
3526 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3527 "join\n", dev->name);
3528 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3529 ifsta->ssid_len);
3530 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3531 int interval = IEEE80211_SCAN_INTERVAL;
3532
3533 if (time_after(jiffies, ifsta->ibss_join_req +
3534 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3535 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3536 (!(local->oper_channel->flags &
3537 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3538 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3539 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3540 printk(KERN_DEBUG "%s: IBSS not allowed on"
3541 " %d MHz\n", dev->name,
3542 local->hw.conf.channel->center_freq);
f0706e82
JB		 3543 }
3544
3545 /* No IBSS found - decrease scan interval and continue
3546 * scanning. */
3547 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3548 }
3549
3550 ifsta->state = IEEE80211_IBSS_SEARCH;
3551 mod_timer(&ifsta->timer, jiffies + interval);
3552 return 0;
3553 }
3554
3555 return 0;
3556}
3557
3558
3559int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3560{
8318d78a 3561 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3562 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 3563
3564 if (len > IEEE80211_MAX_SSID_LEN)
3565 return -EINVAL;
3566
f0706e82
JB		 3567 ifsta = &sdata->u.sta;
3568
3569 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3570 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3571 memcpy(ifsta->ssid, ssid, len);
3572 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3573 ifsta->ssid_len = len;
3574
d6f2da5b
JS		 3575 if (len)
3576 ifsta->flags |= IEEE80211_STA_SSID_SET;
3577 else
3578 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3579 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3580 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3581 ifsta->ibss_join_req = jiffies;
3582 ifsta->state = IEEE80211_IBSS_SEARCH;
3583 return ieee80211_sta_find_ibss(dev, ifsta);
3584 }
3585 return 0;
3586}
3587
3588
3589int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3590{
3591 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3592 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3593 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3594 *len = ifsta->ssid_len;
3595 return 0;
3596}
3597
3598
3599int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3600{
3601 struct ieee80211_sub_if_data *sdata;
3602 struct ieee80211_if_sta *ifsta;
3603 int res;
3604
3605 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3606 ifsta = &sdata->u.sta;
3607
3608 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3609 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3610 res = ieee80211_if_config(dev);
3611 if (res) {
3612 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3613 "the low-level driver\n", dev->name);
3614 return res;
3615 }
3616 }
3617
d6f2da5b
JS		 3618 if (is_valid_ether_addr(bssid))
3619 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3620 else
d6f2da5b
JS		 3621 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3622
f0706e82
JB		 3623 return 0;
3624}
3625
3626
3627static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3628 struct ieee80211_sub_if_data *sdata,
3629 int powersave)
3630{
3631 struct sk_buff *skb;
3632 struct ieee80211_hdr *nullfunc;
3633 u16 fc;
3634
3635 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3636 if (!skb) {
3637 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3638 "frame\n", sdata->dev->name);
3639 return;
3640 }
3641 skb_reserve(skb, local->hw.extra_tx_headroom);
3642
3643 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3644 memset(nullfunc, 0, 24);
3645 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3646 IEEE80211_FCTL_TODS;
3647 if (powersave)
3648 fc |= IEEE80211_FCTL_PM;
3649 nullfunc->frame_control = cpu_to_le16(fc);
3650 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3651 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3652 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3653
3654 ieee80211_sta_tx(sdata->dev, skb, 0);
3655}
3656
3657
69d3b6f4
JB		 3658static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3659{
3660 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3661 ieee80211_vif_is_mesh(&sdata->vif))
3662 ieee80211_sta_timer((unsigned long)sdata);
3663}
3664
f0706e82
JB		 3665void ieee80211_scan_completed(struct ieee80211_hw *hw)
3666{
3667 struct ieee80211_local *local = hw_to_local(hw);
3668 struct net_device *dev = local->scan_dev;
3669 struct ieee80211_sub_if_data *sdata;
3670 union iwreq_data wrqu;
3671
3672 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3673 memset(&wrqu, 0, sizeof(wrqu));
3674 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3675
ece8eddd
ZY		 3676 if (local->sta_hw_scanning) {
3677 local->sta_hw_scanning = 0;
675ef586
MA		 3678 if (ieee80211_hw_config(local))
3679 printk(KERN_DEBUG "%s: failed to restore operational "
3680 "channel after scan\n", dev->name);
69d3b6f4
JB		 3681 /* Restart STA timer for HW scan case */
3682 rcu_read_lock();
3683 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3684 ieee80211_restart_sta_timer(sdata);
3685 rcu_read_unlock();
3686
ece8eddd
ZY		 3687 goto done;
3688 }
3689
3690 local->sta_sw_scanning = 0;
f0706e82 3691 if (ieee80211_hw_config(local))
4b50e388 3692 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3693 "channel after scan\n", dev->name);
3694
4150c572
JB		 3695
3696 netif_tx_lock_bh(local->mdev);
3697 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3698 local->ops->configure_filter(local_to_hw(local),
3699 FIF_BCN_PRBRESP_PROMISC,
3700 &local->filter_flags,
3701 local->mdev->mc_count,
3702 local->mdev->mc_list);
3703
3704 netif_tx_unlock_bh(local->mdev);
f0706e82 3705
79010420
JB		 3706 rcu_read_lock();
3707 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3708
3709 /* No need to wake the master device. */
3710 if (sdata->dev == local->mdev)
3711 continue;
3712
69d3b6f4
JB		 3713 /* Tell AP we're back */
3714 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3715 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3716 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3717
69d3b6f4 3718 ieee80211_restart_sta_timer(sdata);
f709fc69 3719
f0706e82
JB		 3720 netif_wake_queue(sdata->dev);
3721 }
79010420 3722 rcu_read_unlock();
f0706e82 3723
ece8eddd 3724done:
f0706e82 3725 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3726 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3727 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3728 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3729 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3730 !ieee80211_sta_active_ibss(dev)))
3731 ieee80211_sta_find_ibss(dev, ifsta);
3732 }
3733}
3734EXPORT_SYMBOL(ieee80211_scan_completed);
3735
3736void ieee80211_sta_scan_work(struct work_struct *work)
3737{
3738 struct ieee80211_local *local =
3739 container_of(work, struct ieee80211_local, scan_work.work);
3740 struct net_device *dev = local->scan_dev;
3741 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3742 struct ieee80211_supported_band *sband;
f0706e82
JB		 3743 struct ieee80211_channel *chan;
3744 int skip;
3745 unsigned long next_delay = 0;
3746
ece8eddd 3747 if (!local->sta_sw_scanning)
f0706e82
JB		 3748 return;
3749
3750 switch (local->scan_state) {
3751 case SCAN_SET_CHANNEL:
69d464d5
JB		 3752 /*
3753 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3754 * after we successfully scanned the last channel of the last
3755 * band (and the last band is supported by the hw)
3756 */
8318d78a
JB		 3757 if (local->scan_band < IEEE80211_NUM_BANDS)
3758 sband = local->hw.wiphy->bands[local->scan_band];
3759 else
3760 sband = NULL;
3761
69d464d5
JB		 3762 /*
3763 * If we are at an unsupported band and have more bands
3764 * left to scan, advance to the next supported one.
3765 */
3766 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3767 local->scan_band++;
3768 sband = local->hw.wiphy->bands[local->scan_band];
3769 local->scan_channel_idx = 0;
3770 }
3771
69d464d5
JB		 3772 /* if no more bands/channels left, complete scan */
3773 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3774 ieee80211_scan_completed(local_to_hw(local));
3775 return;
3776 }
8318d78a
JB		 3777 skip = 0;
3778 chan = &sband->channels[local->scan_channel_idx];
3779
3780 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3781 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3782 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3783 skip = 1;
3784
3785 if (!skip) {
f0706e82
JB		 3786 local->scan_channel = chan;
3787 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3788 printk(KERN_DEBUG "%s: failed to set freq to "
3789 "%d MHz for scan\n", dev->name,
3790 chan->center_freq);
f0706e82
JB		 3791 skip = 1;
3792 }
3793 }
3794
69d464d5 3795 /* advance state machine to next channel/band */
f0706e82 3796 local->scan_channel_idx++;
8318d78a 3797 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3798 /*
3799 * scan_band may end up == IEEE80211_NUM_BANDS, but
3800 * we'll catch that case above and complete the scan
3801 * if that is the case.
3802 */
8318d78a
JB		 3803 local->scan_band++;
3804 local->scan_channel_idx = 0;
f0706e82
JB		 3805 }
3806
3807 if (skip)
3808 break;
3809
3810 next_delay = IEEE80211_PROBE_DELAY +
3811 usecs_to_jiffies(local->hw.channel_change_time);
3812 local->scan_state = SCAN_SEND_PROBE;
3813 break;
3814 case SCAN_SEND_PROBE:
8318d78a 3815 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3816 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3817
3818 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3819 break;
3820 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3821 local->scan_ssid_len);
3822 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3823 break;
3824 }
3825
ece8eddd 3826 if (local->sta_sw_scanning)
f0706e82
JB		 3827 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3828 next_delay);
3829}
3830
3831
3832static int ieee80211_sta_start_scan(struct net_device *dev,
3833 u8 *ssid, size_t ssid_len)
3834{
3835 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3836 struct ieee80211_sub_if_data *sdata;
3837
3838 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3839 return -EINVAL;
3840
3841 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3842 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3843 * BSSID: MACAddress
3844 * SSID
3845 * ScanType: ACTIVE, PASSIVE
3846 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3847 * a Probe frame during active scanning
3848 * ChannelList
3849 * MinChannelTime (>= ProbeDelay), in TU
3850 * MaxChannelTime: (>= MinChannelTime), in TU
3851 */
3852
3853 /* MLME-SCAN.confirm
3854 * BSSDescriptionSet
3855 * ResultCode: SUCCESS, INVALID_PARAMETERS
3856 */
3857
ece8eddd 3858 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3859 if (local->scan_dev == dev)
3860 return 0;
3861 return -EBUSY;
3862 }
3863
3864 if (local->ops->hw_scan) {
3865 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3866 ssid, ssid_len);
f0706e82 3867 if (!rc) {
ece8eddd 3868 local->sta_hw_scanning = 1;
f0706e82
JB		 3869 local->scan_dev = dev;
3870 }
3871 return rc;
3872 }
3873
ece8eddd 3874 local->sta_sw_scanning = 1;
f0706e82 3875
79010420
JB		 3876 rcu_read_lock();
3877 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3878
3879 /* Don't stop the master interface, otherwise we can't transmit
3880 * probes! */
3881 if (sdata->dev == local->mdev)
3882 continue;
3883
f0706e82 3884 netif_stop_queue(sdata->dev);
51fb61e7 3885 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3886 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3887 ieee80211_send_nullfunc(local, sdata, 1);
3888 }
79010420 3889 rcu_read_unlock();
f0706e82
JB		 3890
3891 if (ssid) {
3892 local->scan_ssid_len = ssid_len;
3893 memcpy(local->scan_ssid, ssid, ssid_len);
3894 } else
3895 local->scan_ssid_len = 0;
3896 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3897 local->scan_channel_idx = 0;
8318d78a 3898 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 3899 local->scan_dev = dev;
3900
4150c572
JB		 3901 netif_tx_lock_bh(local->mdev);
3902 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3903 local->ops->configure_filter(local_to_hw(local),
3904 FIF_BCN_PRBRESP_PROMISC,
3905 &local->filter_flags,
3906 local->mdev->mc_count,
3907 local->mdev->mc_list);
3908 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3909
3910 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3911 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3912 IEEE80211_CHANNEL_TIME);
3913
3914 return 0;
3915}
3916
3917
3918int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3919{
3920 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3921 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3922 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3923
51fb61e7 3924 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3925 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3926
ece8eddd 3927 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3928 if (local->scan_dev == dev)
3929 return 0;
3930 return -EBUSY;
3931 }
3932
a0af5f14
HS		 3933 ifsta->scan_ssid_len = ssid_len;
3934 if (ssid_len)
3935 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3936 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3937 queue_work(local->hw.workqueue, &ifsta->work);
3938 return 0;
3939}
3940
3941static char *
3942ieee80211_sta_scan_result(struct net_device *dev,
3943 struct ieee80211_sta_bss *bss,
3944 char *current_ev, char *end_buf)
3945{
3946 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3947 struct iw_event iwe;
3948
3949 if (time_after(jiffies,
3950 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3951 return current_ev;
3952
f0706e82
JB		 3953 memset(&iwe, 0, sizeof(iwe));
3954 iwe.cmd = SIOCGIWAP;
3955 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3956 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3957 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3958 IW_EV_ADDR_LEN);
3959
3960 memset(&iwe, 0, sizeof(iwe));
3961 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 3962 if (bss_mesh_cfg(bss)) {
3963 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69
LCC		 3964 iwe.u.data.flags = 1;
3965 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
902acc78 3966 bss_mesh_id(bss));
f709fc69
LCC		 3967 } else {
3968 iwe.u.data.length = bss->ssid_len;
3969 iwe.u.data.flags = 1;
3970 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3971 bss->ssid);
3972 }
f0706e82 3973
1d1b5359
LCC		 3974 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3975 || bss_mesh_cfg(bss)) {
f0706e82
JB		 3976 memset(&iwe, 0, sizeof(iwe));
3977 iwe.cmd = SIOCGIWMODE;
902acc78 3978 if (bss_mesh_cfg(bss))
f709fc69
LCC		 3979 iwe.u.mode = IW_MODE_MESH;
3980 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 3981 iwe.u.mode = IW_MODE_MASTER;
3982 else
3983 iwe.u.mode = IW_MODE_ADHOC;
3984 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3985 IW_EV_UINT_LEN);
3986 }
3987
3988 memset(&iwe, 0, sizeof(iwe));
3989 iwe.cmd = SIOCGIWFREQ;
8318d78a
JB		 3990 iwe.u.freq.m = bss->freq;
3991 iwe.u.freq.e = 6;
f0706e82
JB		 3992 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3993 IW_EV_FREQ_LEN);
8318d78a
JB		 3994
3995 memset(&iwe, 0, sizeof(iwe));
3996 iwe.cmd = SIOCGIWFREQ;
3997 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3998 iwe.u.freq.e = 0;
f0706e82
JB		 3999 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4000 IW_EV_FREQ_LEN);
4001
4002 memset(&iwe, 0, sizeof(iwe));
4003 iwe.cmd = IWEVQUAL;
4004 iwe.u.qual.qual = bss->signal;
4005 iwe.u.qual.level = bss->rssi;
4006 iwe.u.qual.noise = bss->noise;
4007 iwe.u.qual.updated = local->wstats_flags;
4008 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4009 IW_EV_QUAL_LEN);
4010
4011 memset(&iwe, 0, sizeof(iwe));
4012 iwe.cmd = SIOCGIWENCODE;
4013 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4014 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4015 else
4016 iwe.u.data.flags = IW_ENCODE_DISABLED;
4017 iwe.u.data.length = 0;
4018 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4019
4020 if (bss && bss->wpa_ie) {
4021 memset(&iwe, 0, sizeof(iwe));
4022 iwe.cmd = IWEVGENIE;
4023 iwe.u.data.length = bss->wpa_ie_len;
4024 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4025 bss->wpa_ie);
4026 }
4027
4028 if (bss && bss->rsn_ie) {
4029 memset(&iwe, 0, sizeof(iwe));
4030 iwe.cmd = IWEVGENIE;
4031 iwe.u.data.length = bss->rsn_ie_len;
4032 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4033 bss->rsn_ie);
4034 }
4035
4036 if (bss && bss->supp_rates_len > 0) {
4037 /* display all supported rates in readable format */
4038 char *p = current_ev + IW_EV_LCP_LEN;
4039 int i;
4040
4041 memset(&iwe, 0, sizeof(iwe));
4042 iwe.cmd = SIOCGIWRATE;
4043 /* Those two flags are ignored... */
4044 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4045
4046 for (i = 0; i < bss->supp_rates_len; i++) {
4047 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4048 0x7f) * 500000);
4049 p = iwe_stream_add_value(current_ev, p,
4050 end_buf, &iwe, IW_EV_PARAM_LEN);
4051 }
4052 current_ev = p;
4053 }
4054
4055 if (bss) {
4056 char *buf;
4057 buf = kmalloc(30, GFP_ATOMIC);
4058 if (buf) {
4059 memset(&iwe, 0, sizeof(iwe));
4060 iwe.cmd = IWEVCUSTOM;
4061 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4062 iwe.u.data.length = strlen(buf);
4063 current_ev = iwe_stream_add_point(current_ev, end_buf,
4064 &iwe, buf);
4065 kfree(buf);
4066 }
4067 }
4068
902acc78 4069 if (bss_mesh_cfg(bss)) {
f709fc69 4070 char *buf;
24736701 4071 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 4072 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 4073 if (buf) {
4074 memset(&iwe, 0, sizeof(iwe));
4075 iwe.cmd = IWEVCUSTOM;
24736701 4076 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4f5d4c4d
LCC		 4077 iwe.u.data.length = strlen(buf);
4078 current_ev = iwe_stream_add_point(current_ev, end_buf,
4079 &iwe, buf);
4080 sprintf(buf, "Path Selection Protocol ID: "
24736701
JL		 4081 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4082 cfg[4]);
4f5d4c4d
LCC		 4083 iwe.u.data.length = strlen(buf);
4084 current_ev = iwe_stream_add_point(current_ev, end_buf,
4085 &iwe, buf);
4086 sprintf(buf, "Path Selection Metric ID: "
24736701
JL		 4087 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4088 cfg[8]);
4f5d4c4d
LCC		 4089 iwe.u.data.length = strlen(buf);
4090 current_ev = iwe_stream_add_point(current_ev, end_buf,
4091 &iwe, buf);
4092 sprintf(buf, "Congestion Control Mode ID: "
24736701
JL		 4093 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4094 cfg[11], cfg[12]);
4f5d4c4d
LCC		 4095 iwe.u.data.length = strlen(buf);
4096 current_ev = iwe_stream_add_point(current_ev, end_buf,
4097 &iwe, buf);
4098 sprintf(buf, "Channel Precedence: "
24736701
JL		 4099 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4100 cfg[15], cfg[16]);
f709fc69
LCC		 4101 iwe.u.data.length = strlen(buf);
4102 current_ev = iwe_stream_add_point(current_ev, end_buf,
4103 &iwe, buf);
4104 kfree(buf);
4105 }
4106 }
4107
f0706e82
JB		 4108 return current_ev;
4109}
4110
4111
4112int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4113{
4114 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4115 char *current_ev = buf;
4116 char *end_buf = buf + len;
4117 struct ieee80211_sta_bss *bss;
4118
4119 spin_lock_bh(&local->sta_bss_lock);
4120 list_for_each_entry(bss, &local->sta_bss_list, list) {
4121 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4122 spin_unlock_bh(&local->sta_bss_lock);
4123 return -E2BIG;
4124 }
4125 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4126 end_buf);
4127 }
4128 spin_unlock_bh(&local->sta_bss_lock);
4129 return current_ev - buf;
4130}
4131
4132
4133int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4134{
4135 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4136 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4137 kfree(ifsta->extra_ie);
4138 if (len == 0) {
4139 ifsta->extra_ie = NULL;
4140 ifsta->extra_ie_len = 0;
4141 return 0;
4142 }
4143 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4144 if (!ifsta->extra_ie) {
4145 ifsta->extra_ie_len = 0;
4146 return -ENOMEM;
4147 }
4148 memcpy(ifsta->extra_ie, ie, len);
4149 ifsta->extra_ie_len = len;
4150 return 0;
4151}
4152
4153
4154struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4155 struct sk_buff *skb, u8 *bssid,
4156 u8 *addr)
4157{
4158 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4159 struct sta_info *sta;
91fa558b 4160 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 4161 DECLARE_MAC_BUF(mac);
f0706e82
JB		 4162
4163 /* TODO: Could consider removing the least recently used entry and
4164 * allow new one to be added. */
4165 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4166 if (net_ratelimit()) {
4167 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 4168 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 4169 }
4170 return NULL;
4171 }
4172
0795af57 4173 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 4174 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82 4175
73651ee6
JB		 4176 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4177 if (!sta)
f0706e82
JB		 4178 return NULL;
4179
238814fd
JB		 4180 sta->flags |= WLAN_STA_AUTHORIZED;
4181
8318d78a
JB		 4182 sta->supp_rates[local->hw.conf.channel->band] =
4183 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
f0706e82
JB		 4184
4185 rate_control_rate_init(sta, local);
4186
93e5deb1 4187 if (sta_info_insert(sta))
73651ee6 4188 return NULL;
73651ee6 4189
d0709a65 4190 return sta;
f0706e82
JB		 4191}
4192
4193
4194int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4195{
4196 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4197 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4198
4199 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4200 dev->name, reason);
4201
51fb61e7
JB		 4202 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4203 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4204 return -EINVAL;
4205
4206 ieee80211_send_deauth(dev, ifsta, reason);
4207 ieee80211_set_disassoc(dev, ifsta, 1);
4208 return 0;
4209}
4210
4211
4212int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4213{
4214 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4215 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4216
4217 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4218 dev->name, reason);
4219
51fb61e7 4220 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4221 return -EINVAL;
4222
d6f2da5b 4223 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4224 return -1;
4225
4226 ieee80211_send_disassoc(dev, ifsta, reason);
4227 ieee80211_set_disassoc(dev, ifsta, 0);
4228 return 0;
4229}
Linux kernel - Deliverables
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