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mac80211: rework TX filtered frame code
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
f0706e82
JB		 27#include <net/iw_handler.h>
28#include <asm/types.h>
f0706e82
JB		 29
30#include <net/mac80211.h>
31#include "ieee80211_i.h"
32#include "ieee80211_rate.h"
47f0c502 33#include "ieee80211_led.h"
f0706e82
JB		 34
35#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_MAX_TRIES 3
39#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
40#define IEEE80211_PROBE_INTERVAL (60 * HZ)
41#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
42#define IEEE80211_SCAN_INTERVAL (2 * HZ)
43#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
44#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
45
46#define IEEE80211_PROBE_DELAY (HZ / 33)
47#define IEEE80211_CHANNEL_TIME (HZ / 33)
48#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
49#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
50#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
51#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
52
53#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
54
55
56#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
57
58#define ERP_INFO_USE_PROTECTION BIT(1)
59
9f985b0e
RR		 60/* mgmt header + 1 byte action code */
61#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
62
63#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
64#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
65#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 66#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
67#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 68
07db2183
RR		 69/* next values represent the buffer size for A-MPDU frame.
70 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
71#define IEEE80211_MIN_AMPDU_BUF 0x8
72#define IEEE80211_MAX_AMPDU_BUF 0x40
73
f0706e82
JB		 74static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
75 u8 *ssid, size_t ssid_len);
76static struct ieee80211_sta_bss *
8318d78a 77ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 78 u8 *ssid, u8 ssid_len);
f0706e82
JB		 79static void ieee80211_rx_bss_put(struct net_device *dev,
80 struct ieee80211_sta_bss *bss);
81static int ieee80211_sta_find_ibss(struct net_device *dev,
82 struct ieee80211_if_sta *ifsta);
83static int ieee80211_sta_wep_configured(struct net_device *dev);
84static int ieee80211_sta_start_scan(struct net_device *dev,
85 u8 *ssid, size_t ssid_len);
86static int ieee80211_sta_config_auth(struct net_device *dev,
87 struct ieee80211_if_sta *ifsta);
88
89
90/* Parsed Information Elements */
91struct ieee802_11_elems {
5558235c 92 /* pointers to IEs */
f0706e82 93 u8 *ssid;
f0706e82 94 u8 *supp_rates;
f0706e82 95 u8 *fh_params;
f0706e82 96 u8 *ds_params;
f0706e82 97 u8 *cf_params;
f0706e82 98 u8 *tim;
f0706e82 99 u8 *ibss_params;
f0706e82 100 u8 *challenge;
f0706e82 101 u8 *wpa;
f0706e82 102 u8 *rsn;
f0706e82 103 u8 *erp_info;
f0706e82 104 u8 *ext_supp_rates;
f0706e82 105 u8 *wmm_info;
f0706e82 106 u8 *wmm_param;
c7153508
RR		 107 u8 *ht_cap_elem;
108 u8 *ht_info_elem;
5558235c
JB		 109 /* length of them, respectively */
110 u8 ssid_len;
111 u8 supp_rates_len;
112 u8 fh_params_len;
113 u8 ds_params_len;
114 u8 cf_params_len;
115 u8 tim_len;
116 u8 ibss_params_len;
117 u8 challenge_len;
118 u8 wpa_len;
119 u8 rsn_len;
120 u8 erp_info_len;
121 u8 ext_supp_rates_len;
122 u8 wmm_info_len;
f0706e82 123 u8 wmm_param_len;
c7153508
RR		 124 u8 ht_cap_elem_len;
125 u8 ht_info_elem_len;
f0706e82
JB		 126};
127
67a4cce4
JL		 128static void ieee802_11_parse_elems(u8 *start, size_t len,
129 struct ieee802_11_elems *elems)
f0706e82
JB		 130{
131 size_t left = len;
132 u8 *pos = start;
f0706e82
JB		 133
134 memset(elems, 0, sizeof(*elems));
135
136 while (left >= 2) {
137 u8 id, elen;
138
139 id = *pos++;
140 elen = *pos++;
141 left -= 2;
142
67a4cce4
JL		 143 if (elen > left)
144 return;
f0706e82
JB		 145
146 switch (id) {
147 case WLAN_EID_SSID:
148 elems->ssid = pos;
149 elems->ssid_len = elen;
150 break;
151 case WLAN_EID_SUPP_RATES:
152 elems->supp_rates = pos;
153 elems->supp_rates_len = elen;
154 break;
155 case WLAN_EID_FH_PARAMS:
156 elems->fh_params = pos;
157 elems->fh_params_len = elen;
158 break;
159 case WLAN_EID_DS_PARAMS:
160 elems->ds_params = pos;
161 elems->ds_params_len = elen;
162 break;
163 case WLAN_EID_CF_PARAMS:
164 elems->cf_params = pos;
165 elems->cf_params_len = elen;
166 break;
167 case WLAN_EID_TIM:
168 elems->tim = pos;
169 elems->tim_len = elen;
170 break;
171 case WLAN_EID_IBSS_PARAMS:
172 elems->ibss_params = pos;
173 elems->ibss_params_len = elen;
174 break;
175 case WLAN_EID_CHALLENGE:
176 elems->challenge = pos;
177 elems->challenge_len = elen;
178 break;
179 case WLAN_EID_WPA:
180 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
181 pos[2] == 0xf2) {
182 /* Microsoft OUI (00:50:F2) */
183 if (pos[3] == 1) {
184 /* OUI Type 1 - WPA IE */
185 elems->wpa = pos;
186 elems->wpa_len = elen;
187 } else if (elen >= 5 && pos[3] == 2) {
188 if (pos[4] == 0) {
189 elems->wmm_info = pos;
190 elems->wmm_info_len = elen;
191 } else if (pos[4] == 1) {
192 elems->wmm_param = pos;
193 elems->wmm_param_len = elen;
194 }
195 }
196 }
197 break;
198 case WLAN_EID_RSN:
199 elems->rsn = pos;
200 elems->rsn_len = elen;
201 break;
202 case WLAN_EID_ERP_INFO:
203 elems->erp_info = pos;
204 elems->erp_info_len = elen;
205 break;
206 case WLAN_EID_EXT_SUPP_RATES:
207 elems->ext_supp_rates = pos;
208 elems->ext_supp_rates_len = elen;
209 break;
c7153508
RR		 210 case WLAN_EID_HT_CAPABILITY:
211 elems->ht_cap_elem = pos;
212 elems->ht_cap_elem_len = elen;
213 break;
214 case WLAN_EID_HT_EXTRA_INFO:
215 elems->ht_info_elem = pos;
216 elems->ht_info_elem_len = elen;
217 break;
f0706e82 218 default:
f0706e82
JB		 219 break;
220 }
221
222 left -= elen;
223 pos += elen;
224 }
f0706e82
JB		 225}
226
227
f0706e82
JB		 228static int ecw2cw(int ecw)
229{
ac2bf324 230 return (1 << ecw) - 1;
f0706e82
JB		 231}
232
f0706e82
JB		 233static void ieee80211_sta_wmm_params(struct net_device *dev,
234 struct ieee80211_if_sta *ifsta,
235 u8 *wmm_param, size_t wmm_param_len)
236{
237 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
238 struct ieee80211_tx_queue_params params;
239 size_t left;
240 int count;
241 u8 *pos;
242
243 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
244 return;
245 count = wmm_param[6] & 0x0f;
246 if (count == ifsta->wmm_last_param_set)
247 return;
248 ifsta->wmm_last_param_set = count;
249
250 pos = wmm_param + 8;
251 left = wmm_param_len - 8;
252
253 memset(&params, 0, sizeof(params));
254
255 if (!local->ops->conf_tx)
256 return;
257
258 local->wmm_acm = 0;
259 for (; left >= 4; left -= 4, pos += 4) {
260 int aci = (pos[0] >> 5) & 0x03;
261 int acm = (pos[0] >> 4) & 0x01;
262 int queue;
263
264 switch (aci) {
265 case 1:
266 queue = IEEE80211_TX_QUEUE_DATA3;
267 if (acm) {
268 local->wmm_acm |= BIT(0) | BIT(3);
269 }
270 break;
271 case 2:
272 queue = IEEE80211_TX_QUEUE_DATA1;
273 if (acm) {
274 local->wmm_acm |= BIT(4) | BIT(5);
275 }
276 break;
277 case 3:
278 queue = IEEE80211_TX_QUEUE_DATA0;
279 if (acm) {
280 local->wmm_acm |= BIT(6) | BIT(7);
281 }
282 break;
283 case 0:
284 default:
285 queue = IEEE80211_TX_QUEUE_DATA2;
286 if (acm) {
287 local->wmm_acm |= BIT(1) | BIT(2);
288 }
289 break;
290 }
291
292 params.aifs = pos[0] & 0x0f;
293 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
294 params.cw_min = ecw2cw(pos[1] & 0x0f);
3330d7be
JB		 295 params.txop = pos[2] | (pos[3] << 8);
296#ifdef CONFIG_MAC80211_DEBUG
f0706e82 297 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 298 "cWmin=%d cWmax=%d txop=%d\n",
f0706e82 299 dev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 300 params.cw_max, params.txop);
301#endif
f0706e82
JB		 302 /* TODO: handle ACM (block TX, fallback to next lowest allowed
303 * AC for now) */
304 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
305 printk(KERN_DEBUG "%s: failed to set TX queue "
306 "parameters for queue %d\n", dev->name, queue);
307 }
308 }
309}
310
311
471b3efd
JB		 312static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
313 u8 erp_value)
5628221c 314{
471b3efd 315 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
5628221c 316 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
471b3efd
JB		 317 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
318 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
0795af57 319 DECLARE_MAC_BUF(mac);
471b3efd 320 u32 changed = 0;
5628221c 321
471b3efd 322 if (use_protection != bss_conf->use_cts_prot) {
5628221c
DD		 323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 325 "%s)\n",
471b3efd 326 sdata->dev->name,
5628221c 327 use_protection ? "enabled" : "disabled",
0795af57 328 print_mac(mac, ifsta->bssid));
5628221c 329 }
471b3efd
JB		 330 bss_conf->use_cts_prot = use_protection;
331 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 332 }
7e9ed188 333
471b3efd 334 if (preamble_mode != bss_conf->use_short_preamble) {
7e9ed188
DD		 335 if (net_ratelimit()) {
336 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 337 " (BSSID=%s)\n",
471b3efd 338 sdata->dev->name,
7e9ed188
DD		 339 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
340 "short" : "long",
0795af57 341 print_mac(mac, ifsta->bssid));
7e9ed188 342 }
471b3efd
JB		 343 bss_conf->use_short_preamble = preamble_mode;
344 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 345 }
d9430a32 346
471b3efd 347 return changed;
5628221c
DD		 348}
349
c7153508
RR		 350int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
351 struct ieee80211_ht_info *ht_info)
352{
353
354 if (ht_info == NULL)
355 return -EINVAL;
356
357 memset(ht_info, 0, sizeof(*ht_info));
358
359 if (ht_cap_ie) {
360 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
361
362 ht_info->ht_supported = 1;
363 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
364 ht_info->ampdu_factor =
365 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
366 ht_info->ampdu_density =
367 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
368 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
369 } else
370 ht_info->ht_supported = 0;
371
372 return 0;
373}
374
375int ieee80211_ht_addt_info_ie_to_ht_bss_info(
376 struct ieee80211_ht_addt_info *ht_add_info_ie,
377 struct ieee80211_ht_bss_info *bss_info)
378{
379 if (bss_info == NULL)
380 return -EINVAL;
381
382 memset(bss_info, 0, sizeof(*bss_info));
383
384 if (ht_add_info_ie) {
385 u16 op_mode;
386 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
387
388 bss_info->primary_channel = ht_add_info_ie->control_chan;
389 bss_info->bss_cap = ht_add_info_ie->ht_param;
390 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
391 }
392
393 return 0;
394}
5628221c 395
f0706e82
JB		 396static void ieee80211_sta_send_associnfo(struct net_device *dev,
397 struct ieee80211_if_sta *ifsta)
398{
399 char *buf;
400 size_t len;
401 int i;
402 union iwreq_data wrqu;
403
404 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
405 return;
406
407 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 408 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 409 if (!buf)
410 return;
411
412 len = sprintf(buf, "ASSOCINFO(");
413 if (ifsta->assocreq_ies) {
414 len += sprintf(buf + len, "ReqIEs=");
415 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
416 len += sprintf(buf + len, "%02x",
417 ifsta->assocreq_ies[i]);
418 }
419 }
420 if (ifsta->assocresp_ies) {
421 if (ifsta->assocreq_ies)
422 len += sprintf(buf + len, " ");
423 len += sprintf(buf + len, "RespIEs=");
424 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
425 len += sprintf(buf + len, "%02x",
426 ifsta->assocresp_ies[i]);
427 }
428 }
429 len += sprintf(buf + len, ")");
430
431 if (len > IW_CUSTOM_MAX) {
432 len = sprintf(buf, "ASSOCRESPIE=");
433 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
434 len += sprintf(buf + len, "%02x",
435 ifsta->assocresp_ies[i]);
436 }
437 }
438
439 memset(&wrqu, 0, sizeof(wrqu));
440 wrqu.data.length = len;
441 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
442
443 kfree(buf);
444}
445
446
447static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 448 struct ieee80211_if_sta *ifsta,
47f0c502 449 bool assoc)
f0706e82 450{
471b3efd
JB		 451 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
452 struct ieee80211_local *local = sdata->local;
f0706e82 453 union iwreq_data wrqu;
471b3efd 454 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 455
f0706e82 456 if (assoc) {
5628221c 457 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 458
459 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
460
51fb61e7 461 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 462 return;
5628221c 463
65c107ab 464 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 465 local->hw.conf.channel->center_freq,
cffdd30d 466 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 467 if (bss) {
468 if (bss->has_erp_value)
471b3efd
JB		 469 changed |= ieee80211_handle_erp_ie(
470 sdata, bss->erp_value);
5628221c
DD		 471 ieee80211_rx_bss_put(dev, bss);
472 }
473
f0706e82 474 netif_carrier_on(dev);
d6f2da5b 475 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 476 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
477 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
478 ieee80211_sta_send_associnfo(dev, ifsta);
479 } else {
d6f2da5b
JS		 480 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
481
f0706e82 482 netif_carrier_off(dev);
d9430a32 483 ieee80211_reset_erp_info(dev);
f0706e82
JB		 484 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
485 }
486 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
487 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
488 ifsta->last_probe = jiffies;
47f0c502 489 ieee80211_led_assoc(local, assoc);
471b3efd 490
b2205256 491 sdata->bss_conf.assoc = assoc;
471b3efd 492 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 493}
494
495static void ieee80211_set_disassoc(struct net_device *dev,
496 struct ieee80211_if_sta *ifsta, int deauth)
497{
498 if (deauth)
499 ifsta->auth_tries = 0;
500 ifsta->assoc_tries = 0;
501 ieee80211_set_associated(dev, ifsta, 0);
502}
503
504static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
505 int encrypt)
506{
507 struct ieee80211_sub_if_data *sdata;
508 struct ieee80211_tx_packet_data *pkt_data;
509
510 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
511 skb->dev = sdata->local->mdev;
512 skb_set_mac_header(skb, 0);
513 skb_set_network_header(skb, 0);
514 skb_set_transport_header(skb, 0);
515
516 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
517 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
518 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 519 if (!encrypt)
520 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 521
522 dev_queue_xmit(skb);
523}
524
525
526static void ieee80211_send_auth(struct net_device *dev,
527 struct ieee80211_if_sta *ifsta,
528 int transaction, u8 *extra, size_t extra_len,
529 int encrypt)
530{
531 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
532 struct sk_buff *skb;
533 struct ieee80211_mgmt *mgmt;
534
535 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
536 sizeof(*mgmt) + 6 + extra_len);
537 if (!skb) {
538 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
539 "frame\n", dev->name);
540 return;
541 }
542 skb_reserve(skb, local->hw.extra_tx_headroom);
543
544 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
545 memset(mgmt, 0, 24 + 6);
546 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
547 IEEE80211_STYPE_AUTH);
548 if (encrypt)
549 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
550 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
551 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
552 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
553 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
554 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
555 ifsta->auth_transaction = transaction + 1;
556 mgmt->u.auth.status_code = cpu_to_le16(0);
557 if (extra)
558 memcpy(skb_put(skb, extra_len), extra, extra_len);
559
560 ieee80211_sta_tx(dev, skb, encrypt);
561}
562
563
564static void ieee80211_authenticate(struct net_device *dev,
565 struct ieee80211_if_sta *ifsta)
566{
0795af57
JP		 567 DECLARE_MAC_BUF(mac);
568
f0706e82
JB		 569 ifsta->auth_tries++;
570 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 571 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 572 " timed out\n",
0795af57 573 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 574 ifsta->state = IEEE80211_DISABLED;
575 return;
576 }
577
578 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 579 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
580 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 581
582 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
583
584 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
585}
586
587
588static void ieee80211_send_assoc(struct net_device *dev,
589 struct ieee80211_if_sta *ifsta)
590{
591 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, *ies;
595 int i, len;
596 u16 capab;
597 struct ieee80211_sta_bss *bss;
598 int wmm = 0;
8318d78a 599 struct ieee80211_supported_band *sband;
f0706e82
JB		 600
601 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
602 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
603 ifsta->ssid_len);
604 if (!skb) {
605 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
606 "frame\n", dev->name);
607 return;
608 }
609 skb_reserve(skb, local->hw.extra_tx_headroom);
610
8318d78a
JB		 611 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
612
f0706e82 613 capab = ifsta->capab;
8318d78a
JB		 614
615 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
616 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
617 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
618 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
619 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 620 }
8318d78a
JB		 621
622 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
623 local->hw.conf.channel->center_freq,
cffdd30d 624 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 625 if (bss) {
626 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
627 capab |= WLAN_CAPABILITY_PRIVACY;
628 if (bss->wmm_ie) {
629 wmm = 1;
630 }
631 ieee80211_rx_bss_put(dev, bss);
632 }
633
634 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
635 memset(mgmt, 0, 24);
636 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
637 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
638 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
639
d6f2da5b 640 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 641 skb_put(skb, 10);
642 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
643 IEEE80211_STYPE_REASSOC_REQ);
644 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
645 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
646 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
647 ETH_ALEN);
648 } else {
649 skb_put(skb, 4);
650 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
651 IEEE80211_STYPE_ASSOC_REQ);
652 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
653 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
654 }
655
656 /* SSID */
657 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
658 *pos++ = WLAN_EID_SSID;
659 *pos++ = ifsta->ssid_len;
660 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
661
8318d78a 662 len = sband->n_bitrates;
f0706e82
JB		 663 if (len > 8)
664 len = 8;
665 pos = skb_put(skb, len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = len;
668 for (i = 0; i < len; i++) {
8318d78a 669 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 670 *pos++ = (u8) (rate / 5);
671 }
672
8318d78a
JB		 673 if (sband->n_bitrates > len) {
674 pos = skb_put(skb, sband->n_bitrates - len + 2);
f0706e82 675 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8318d78a
JB		 676 *pos++ = sband->n_bitrates - len;
677 for (i = len; i < sband->n_bitrates; i++) {
678 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 679 *pos++ = (u8) (rate / 5);
680 }
681 }
682
683 if (ifsta->extra_ie) {
684 pos = skb_put(skb, ifsta->extra_ie_len);
685 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
686 }
687
d6f2da5b 688 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 689 pos = skb_put(skb, 9);
690 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
691 *pos++ = 7; /* len */
692 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
693 *pos++ = 0x50;
694 *pos++ = 0xf2;
695 *pos++ = 2; /* WME */
696 *pos++ = 0; /* WME info */
697 *pos++ = 1; /* WME ver */
698 *pos++ = 0;
699 }
c7153508 700 /* wmm support is a must to HT */
8318d78a
JB		 701 if (wmm && sband->ht_info.ht_supported) {
702 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
c7153508
RR		 703 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
704 *pos++ = WLAN_EID_HT_CAPABILITY;
705 *pos++ = sizeof(struct ieee80211_ht_cap);
706 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
707 memcpy(pos, &tmp, sizeof(u16));
708 pos += sizeof(u16);
8318d78a
JB		 709 /* TODO: needs a define here for << 2 */
710 *pos++ = sband->ht_info.ampdu_factor |
711 (sband->ht_info.ampdu_density << 2);
712 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 713 }
f0706e82
JB		 714
715 kfree(ifsta->assocreq_ies);
716 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 717 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 718 if (ifsta->assocreq_ies)
719 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
720
721 ieee80211_sta_tx(dev, skb, 0);
722}
723
724
725static void ieee80211_send_deauth(struct net_device *dev,
726 struct ieee80211_if_sta *ifsta, u16 reason)
727{
728 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
729 struct sk_buff *skb;
730 struct ieee80211_mgmt *mgmt;
731
732 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
733 if (!skb) {
734 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
735 "frame\n", dev->name);
736 return;
737 }
738 skb_reserve(skb, local->hw.extra_tx_headroom);
739
740 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
741 memset(mgmt, 0, 24);
742 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
743 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
744 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
745 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
746 IEEE80211_STYPE_DEAUTH);
747 skb_put(skb, 2);
748 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
749
750 ieee80211_sta_tx(dev, skb, 0);
751}
752
753
754static void ieee80211_send_disassoc(struct net_device *dev,
755 struct ieee80211_if_sta *ifsta, u16 reason)
756{
757 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
758 struct sk_buff *skb;
759 struct ieee80211_mgmt *mgmt;
760
761 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
762 if (!skb) {
763 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
764 "frame\n", dev->name);
765 return;
766 }
767 skb_reserve(skb, local->hw.extra_tx_headroom);
768
769 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
770 memset(mgmt, 0, 24);
771 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
772 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
773 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
774 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
775 IEEE80211_STYPE_DISASSOC);
776 skb_put(skb, 2);
777 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
778
779 ieee80211_sta_tx(dev, skb, 0);
780}
781
782
783static int ieee80211_privacy_mismatch(struct net_device *dev,
784 struct ieee80211_if_sta *ifsta)
785{
65c107ab 786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 787 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 788 int bss_privacy;
789 int wep_privacy;
790 int privacy_invoked;
f0706e82 791
5b98b1f7 792 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 793 return 0;
794
8318d78a
JB		 795 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
796 local->hw.conf.channel->center_freq,
cffdd30d 797 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 798 if (!bss)
799 return 0;
800
5b98b1f7
JB		 801 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
802 wep_privacy = !!ieee80211_sta_wep_configured(dev);
803 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 804
805 ieee80211_rx_bss_put(dev, bss);
806
5b98b1f7
JB		 807 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
808 return 0;
809
810 return 1;
f0706e82
JB		 811}
812
813
814static void ieee80211_associate(struct net_device *dev,
815 struct ieee80211_if_sta *ifsta)
816{
0795af57
JP		 817 DECLARE_MAC_BUF(mac);
818
f0706e82
JB		 819 ifsta->assoc_tries++;
820 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 821 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 822 " timed out\n",
0795af57 823 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 824 ifsta->state = IEEE80211_DISABLED;
825 return;
826 }
827
828 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 829 printk(KERN_DEBUG "%s: associate with AP %s\n",
830 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 831 if (ieee80211_privacy_mismatch(dev, ifsta)) {
832 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
833 "mixed-cell disabled - abort association\n", dev->name);
834 ifsta->state = IEEE80211_DISABLED;
835 return;
836 }
837
838 ieee80211_send_assoc(dev, ifsta);
839
840 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
841}
842
843
844static void ieee80211_associated(struct net_device *dev,
845 struct ieee80211_if_sta *ifsta)
846{
847 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
848 struct sta_info *sta;
849 int disassoc;
0795af57 850 DECLARE_MAC_BUF(mac);
f0706e82
JB		 851
852 /* TODO: start monitoring current AP signal quality and number of
853 * missed beacons. Scan other channels every now and then and search
854 * for better APs. */
855 /* TODO: remove expired BSSes */
856
857 ifsta->state = IEEE80211_ASSOCIATED;
858
859 sta = sta_info_get(local, ifsta->bssid);
860 if (!sta) {
0795af57
JP		 861 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
862 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 863 disassoc = 1;
864 } else {
865 disassoc = 0;
866 if (time_after(jiffies,
867 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 868 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 869 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 870 "current AP %s - assume out of "
f0706e82 871 "range\n",
0795af57 872 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 873 disassoc = 1;
be8755e1 874 sta_info_free(sta);
d6f2da5b 875 } else
f0706e82
JB		 876 ieee80211_send_probe_req(dev, ifsta->bssid,
877 local->scan_ssid,
878 local->scan_ssid_len);
d6f2da5b 879 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 880 } else {
d6f2da5b 881 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 882 if (time_after(jiffies, ifsta->last_probe +
883 IEEE80211_PROBE_INTERVAL)) {
884 ifsta->last_probe = jiffies;
885 ieee80211_send_probe_req(dev, ifsta->bssid,
886 ifsta->ssid,
887 ifsta->ssid_len);
888 }
889 }
890 sta_info_put(sta);
891 }
892 if (disassoc) {
2d192d95
MW		 893 ifsta->state = IEEE80211_DISABLED;
894 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 895 } else {
896 mod_timer(&ifsta->timer, jiffies +
897 IEEE80211_MONITORING_INTERVAL);
898 }
899}
900
901
902static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
903 u8 *ssid, size_t ssid_len)
904{
905 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 906 struct ieee80211_supported_band *sband;
f0706e82
JB		 907 struct sk_buff *skb;
908 struct ieee80211_mgmt *mgmt;
909 u8 *pos, *supp_rates, *esupp_rates = NULL;
910 int i;
911
912 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
913 if (!skb) {
914 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
915 "request\n", dev->name);
916 return;
917 }
918 skb_reserve(skb, local->hw.extra_tx_headroom);
919
920 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
921 memset(mgmt, 0, 24);
922 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
923 IEEE80211_STYPE_PROBE_REQ);
924 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
925 if (dst) {
926 memcpy(mgmt->da, dst, ETH_ALEN);
927 memcpy(mgmt->bssid, dst, ETH_ALEN);
928 } else {
929 memset(mgmt->da, 0xff, ETH_ALEN);
930 memset(mgmt->bssid, 0xff, ETH_ALEN);
931 }
932 pos = skb_put(skb, 2 + ssid_len);
933 *pos++ = WLAN_EID_SSID;
934 *pos++ = ssid_len;
935 memcpy(pos, ssid, ssid_len);
936
937 supp_rates = skb_put(skb, 2);
938 supp_rates[0] = WLAN_EID_SUPP_RATES;
939 supp_rates[1] = 0;
8318d78a
JB		 940 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
941
942 for (i = 0; i < sband->n_bitrates; i++) {
943 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 944 if (esupp_rates) {
945 pos = skb_put(skb, 1);
946 esupp_rates[1]++;
947 } else if (supp_rates[1] == 8) {
948 esupp_rates = skb_put(skb, 3);
949 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
950 esupp_rates[1] = 1;
951 pos = &esupp_rates[2];
952 } else {
953 pos = skb_put(skb, 1);
954 supp_rates[1]++;
955 }
8318d78a 956 *pos = rate->bitrate / 5;
f0706e82
JB		 957 }
958
959 ieee80211_sta_tx(dev, skb, 0);
960}
961
962
963static int ieee80211_sta_wep_configured(struct net_device *dev)
964{
965 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
966 if (!sdata || !sdata->default_key ||
8f20fc24 967 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 968 return 0;
969 return 1;
970}
971
972
973static void ieee80211_auth_completed(struct net_device *dev,
974 struct ieee80211_if_sta *ifsta)
975{
976 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 977 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 978 ieee80211_associate(dev, ifsta);
979}
980
981
982static void ieee80211_auth_challenge(struct net_device *dev,
983 struct ieee80211_if_sta *ifsta,
984 struct ieee80211_mgmt *mgmt,
985 size_t len)
986{
987 u8 *pos;
988 struct ieee802_11_elems elems;
989
990 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
991 pos = mgmt->u.auth.variable;
67a4cce4 992 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 993 if (!elems.challenge) {
994 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
995 "frame\n", dev->name);
996 return;
997 }
998 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
999 elems.challenge_len + 2, 1);
1000}
1001
9f985b0e
RR		 1002static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1003 u8 dialog_token, u16 status, u16 policy,
1004 u16 buf_size, u16 timeout)
1005{
1006 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1008 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1009 struct sk_buff *skb;
1010 struct ieee80211_mgmt *mgmt;
1011 u16 capab;
1012
07db2183
RR		 1013 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1014 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1015 if (!skb) {
1016 printk(KERN_DEBUG "%s: failed to allocate buffer "
1017 "for addba resp frame\n", dev->name);
1018 return;
1019 }
1020
1021 skb_reserve(skb, local->hw.extra_tx_headroom);
1022 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1023 memset(mgmt, 0, 24);
1024 memcpy(mgmt->da, da, ETH_ALEN);
1025 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1026 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1027 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1028 else
1029 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1030 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1031 IEEE80211_STYPE_ACTION);
1032
1033 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1034 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1035 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1036 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1037
1038 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1039 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1040 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1041
1042 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1043 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1044 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1045
1046 ieee80211_sta_tx(dev, skb, 0);
1047
1048 return;
1049}
1050
eadc8d9e
RR		 1051void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1052 u16 tid, u8 dialog_token, u16 start_seq_num,
1053 u16 agg_size, u16 timeout)
1054{
1055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1056 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1057 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1058 struct sk_buff *skb;
1059 struct ieee80211_mgmt *mgmt;
1060 u16 capab;
1061
1062 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1063 sizeof(mgmt->u.action.u.addba_req));
1064
1065
1066 if (!skb) {
1067 printk(KERN_ERR "%s: failed to allocate buffer "
1068 "for addba request frame\n", dev->name);
1069 return;
1070 }
1071 skb_reserve(skb, local->hw.extra_tx_headroom);
1072 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1073 memset(mgmt, 0, 24);
1074 memcpy(mgmt->da, da, ETH_ALEN);
1075 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1076 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1077 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1078 else
1079 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1080
1081 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1082 IEEE80211_STYPE_ACTION);
1083
1084 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1085
1086 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1087 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1088
1089 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1090 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1091 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1092 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1093
1094 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1095
1096 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1097 mgmt->u.action.u.addba_req.start_seq_num =
1098 cpu_to_le16(start_seq_num << 4);
1099
1100 ieee80211_sta_tx(dev, skb, 0);
1101}
1102
9f985b0e
RR		 1103static void ieee80211_sta_process_addba_request(struct net_device *dev,
1104 struct ieee80211_mgmt *mgmt,
1105 size_t len)
1106{
1107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1108 struct ieee80211_hw *hw = &local->hw;
1109 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1110 struct sta_info *sta;
07db2183
RR		 1111 struct tid_ampdu_rx *tid_agg_rx;
1112 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1113 u8 dialog_token;
07db2183
RR		 1114 int ret = -EOPNOTSUPP;
1115 DECLARE_MAC_BUF(mac);
9f985b0e
RR		 1116
1117 sta = sta_info_get(local, mgmt->sa);
1118 if (!sta)
1119 return;
1120
1121 /* extract session parameters from addba request frame */
1122 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1123 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1124 start_seq_num =
1125 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1126
1127 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1128 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1129 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1130 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1131
9f985b0e
RR		 1132 status = WLAN_STATUS_REQUEST_DECLINED;
1133
07db2183
RR		 1134 /* sanity check for incoming parameters:
1135 * check if configuration can support the BA policy
1136 * and if buffer size does not exceeds max value */
1137 if (((ba_policy != 1)
1138 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1139 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1140 status = WLAN_STATUS_INVALID_QOS_PARAM;
1141#ifdef CONFIG_MAC80211_HT_DEBUG
1142 if (net_ratelimit())
1143 printk(KERN_DEBUG "Block Ack Req with bad params from "
1144 "%s on tid %u. policy %d, buffer size %d\n",
1145 print_mac(mac, mgmt->sa), tid, ba_policy,
1146 buf_size);
1147#endif /* CONFIG_MAC80211_HT_DEBUG */
1148 goto end_no_lock;
1149 }
1150 /* determine default buffer size */
1151 if (buf_size == 0) {
8318d78a
JB		 1152 struct ieee80211_supported_band *sband;
1153
1154 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1155 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1156 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1157 }
1158
1159 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1160
1161 /* examine state machine */
1162 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1163
1164 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1165#ifdef CONFIG_MAC80211_HT_DEBUG
1166 if (net_ratelimit())
1167 printk(KERN_DEBUG "unexpected Block Ack Req from "
1168 "%s on tid %u\n",
1169 print_mac(mac, mgmt->sa), tid);
1170#endif /* CONFIG_MAC80211_HT_DEBUG */
1171 goto end;
1172 }
1173
1174 /* prepare reordering buffer */
1175 tid_agg_rx->reorder_buf =
1176 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1177 if (!tid_agg_rx->reorder_buf) {
1178 if (net_ratelimit())
1179 printk(KERN_ERR "can not allocate reordering buffer "
1180 "to tid %d\n", tid);
07db2183
RR		 1181 goto end;
1182 }
1183 memset(tid_agg_rx->reorder_buf, 0,
1184 buf_size * sizeof(struct sk_buf *));
1185
1186 if (local->ops->ampdu_action)
1187 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1188 sta->addr, tid, &start_seq_num);
07db2183
RR		 1189#ifdef CONFIG_MAC80211_HT_DEBUG
1190 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1191#endif /* CONFIG_MAC80211_HT_DEBUG */
1192
1193 if (ret) {
1194 kfree(tid_agg_rx->reorder_buf);
1195 goto end;
1196 }
1197
1198 /* change state and send addba resp */
1199 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1200 tid_agg_rx->dialog_token = dialog_token;
1201 tid_agg_rx->ssn = start_seq_num;
1202 tid_agg_rx->head_seq_num = start_seq_num;
1203 tid_agg_rx->buf_size = buf_size;
1204 tid_agg_rx->timeout = timeout;
1205 tid_agg_rx->stored_mpdu_num = 0;
1206 status = WLAN_STATUS_SUCCESS;
1207end:
1208 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1209
1210end_no_lock:
9f985b0e
RR		 1211 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1212 status, 1, buf_size, timeout);
1213 sta_info_put(sta);
1214}
f0706e82 1215
eadc8d9e
RR		 1216static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1217 struct ieee80211_mgmt *mgmt,
1218 size_t len)
1219{
1220 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1221 struct ieee80211_hw *hw = &local->hw;
1222 struct sta_info *sta;
1223 u16 capab;
1224 u16 tid;
1225 u8 *state;
1226
1227 sta = sta_info_get(local, mgmt->sa);
1228 if (!sta)
1229 return;
1230
1231 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1232 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1233
1234 state = &sta->ampdu_mlme.tid_tx[tid].state;
1235
1236 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1237
1238 if (mgmt->u.action.u.addba_resp.dialog_token !=
1239 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1240 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1241#ifdef CONFIG_MAC80211_HT_DEBUG
1242 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1243#endif /* CONFIG_MAC80211_HT_DEBUG */
1244 sta_info_put(sta);
1245 return;
1246 }
1247
1248 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1249#ifdef CONFIG_MAC80211_HT_DEBUG
1250 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1251#endif /* CONFIG_MAC80211_HT_DEBUG */
1252 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1253 == WLAN_STATUS_SUCCESS) {
1254 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1255 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1256 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1257 "%d\n", *state);
1258 sta_info_put(sta);
1259 return;
1260 }
1261
1262 if (*state & HT_ADDBA_RECEIVED_MSK)
1263 printk(KERN_DEBUG "double addBA response\n");
1264
1265 *state |= HT_ADDBA_RECEIVED_MSK;
1266 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1267
1268 if (*state == HT_AGG_STATE_OPERATIONAL) {
1269 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1270 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1271 }
1272
1273 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1274 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1275 } else {
1276 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1277
1278 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1279 /* this will allow the state check in stop_BA_session */
1280 *state = HT_AGG_STATE_OPERATIONAL;
1281 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1282 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1283 WLAN_BACK_INITIATOR);
1284 }
1285 sta_info_put(sta);
1286}
1287
1288void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1289 u16 initiator, u16 reason_code)
07db2183
RR		 1290{
1291 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1292 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1293 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1294 struct sk_buff *skb;
1295 struct ieee80211_mgmt *mgmt;
1296 u16 params;
1297
1298 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1299 sizeof(mgmt->u.action.u.delba));
1300
1301 if (!skb) {
1302 printk(KERN_ERR "%s: failed to allocate buffer "
1303 "for delba frame\n", dev->name);
1304 return;
1305 }
1306
1307 skb_reserve(skb, local->hw.extra_tx_headroom);
1308 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1309 memset(mgmt, 0, 24);
1310 memcpy(mgmt->da, da, ETH_ALEN);
1311 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1312 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1313 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1314 else
1315 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1316 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1317 IEEE80211_STYPE_ACTION);
1318
1319 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1320
1321 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1322 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1323 params = (u16)(initiator << 11); /* bit 11 initiator */
1324 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1325
1326 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1327 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1328
1329 ieee80211_sta_tx(dev, skb, 0);
1330}
1331
1332void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1333 u16 initiator, u16 reason)
1334{
1335 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1336 struct ieee80211_hw *hw = &local->hw;
1337 struct sta_info *sta;
b580781e 1338 int ret, i;
07db2183
RR		 1339
1340 sta = sta_info_get(local, ra);
1341 if (!sta)
1342 return;
1343
1344 /* check if TID is in operational state */
1345 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1346 if (sta->ampdu_mlme.tid_rx[tid].state
1347 != HT_AGG_STATE_OPERATIONAL) {
1348 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
07db2183
RR		 1349 sta_info_put(sta);
1350 return;
1351 }
1352 sta->ampdu_mlme.tid_rx[tid].state =
1353 HT_AGG_STATE_REQ_STOP_BA_MSK |
1354 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1355 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1356
1357 /* stop HW Rx aggregation. ampdu_action existence
1358 * already verified in session init so we add the BUG_ON */
1359 BUG_ON(!local->ops->ampdu_action);
1360
1361 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1362 ra, tid, NULL);
07db2183
RR		 1363 if (ret)
1364 printk(KERN_DEBUG "HW problem - can not stop rx "
1365 "aggergation for tid %d\n", tid);
1366
1367 /* shutdown timer has not expired */
1368 if (initiator != WLAN_BACK_TIMER)
1369 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1370 session_timer);
1371
1372 /* check if this is a self generated aggregation halt */
1373 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1374 ieee80211_send_delba(dev, ra, tid, 0, reason);
1375
1376 /* free the reordering buffer */
b580781e
RR		 1377 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1378 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1379 /* release the reordered frames */
1380 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1381 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1382 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1383 }
1384 }
07db2183
RR		 1385 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1386
1387 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1388 sta_info_put(sta);
1389}
1390
eadc8d9e 1391
688b88a4
RR		 1392static void ieee80211_sta_process_delba(struct net_device *dev,
1393 struct ieee80211_mgmt *mgmt, size_t len)
1394{
1395 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1396 struct sta_info *sta;
1397 u16 tid, params;
1398 u16 initiator;
1399 DECLARE_MAC_BUF(mac);
1400
1401 sta = sta_info_get(local, mgmt->sa);
1402 if (!sta)
1403 return;
1404
1405 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1406 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1407 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1408
1409#ifdef CONFIG_MAC80211_HT_DEBUG
1410 if (net_ratelimit())
d92684e6
RR		 1411 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1412 print_mac(mac, mgmt->sa),
1413 initiator ? "recipient" : "initiator", tid,
688b88a4
RR		 1414 mgmt->u.action.u.delba.reason_code);
1415#endif /* CONFIG_MAC80211_HT_DEBUG */
1416
1417 if (initiator == WLAN_BACK_INITIATOR)
1418 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1419 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1420 else { /* WLAN_BACK_RECIPIENT */
1421 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1422 sta->ampdu_mlme.tid_tx[tid].state =
1423 HT_AGG_STATE_OPERATIONAL;
1424 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1425 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1426 WLAN_BACK_RECIPIENT);
1427 }
688b88a4
RR		 1428 sta_info_put(sta);
1429}
1430
eadc8d9e
RR		 1431/*
1432 * After sending add Block Ack request we activated a timer until
1433 * add Block Ack response will arrive from the recipient.
1434 * If this timer expires sta_addba_resp_timer_expired will be executed.
1435 */
1436void sta_addba_resp_timer_expired(unsigned long data)
1437{
1438 /* not an elegant detour, but there is no choice as the timer passes
1439 * only one argument, and both sta_info and TID are needed, so init
1440 * flow in sta_info_add gives the TID as data, while the timer_to_id
1441 * array gives the sta through container_of */
1442 u16 tid = *(int *)data;
1443 struct sta_info *temp_sta = container_of((void *)data,
1444 struct sta_info, timer_to_tid[tid]);
1445
1446 struct ieee80211_local *local = temp_sta->local;
1447 struct ieee80211_hw *hw = &local->hw;
1448 struct sta_info *sta;
1449 u8 *state;
1450
1451 sta = sta_info_get(local, temp_sta->addr);
1452 if (!sta)
1453 return;
1454
1455 state = &sta->ampdu_mlme.tid_tx[tid].state;
1456 /* check if the TID waits for addBA response */
1457 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1458 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1459 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1460 *state = HT_AGG_STATE_IDLE;
1461 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1462 "expecting addBA response there", tid);
1463 goto timer_expired_exit;
1464 }
1465
1466 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1467
1468 /* go through the state check in stop_BA_session */
1469 *state = HT_AGG_STATE_OPERATIONAL;
1470 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1471 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1472 WLAN_BACK_INITIATOR);
1473
1474timer_expired_exit:
1475 sta_info_put(sta);
1476}
1477
07db2183
RR		 1478/*
1479 * After receiving Block Ack Request (BAR) we activated a
1480 * timer after each frame arrives from the originator.
1481 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1482 */
1483void sta_rx_agg_session_timer_expired(unsigned long data)
1484{
1485 /* not an elegant detour, but there is no choice as the timer passes
1486 * only one argument, and verious sta_info are needed here, so init
1487 * flow in sta_info_add gives the TID as data, while the timer_to_id
1488 * array gives the sta through container_of */
1489 u8 *ptid = (u8 *)data;
1490 u8 *timer_to_id = ptid - *ptid;
1491 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1492 timer_to_tid[0]);
1493
1494 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1495 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1496 WLAN_BACK_TIMER,
1497 WLAN_REASON_QSTA_TIMEOUT);
1498}
1499
1500
f0706e82
JB		 1501static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1502 struct ieee80211_if_sta *ifsta,
1503 struct ieee80211_mgmt *mgmt,
1504 size_t len)
1505{
1506 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1507 u16 auth_alg, auth_transaction, status_code;
0795af57 1508 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1509
1510 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1511 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1512 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1513 "%s, but not in authenticate state - ignored\n",
1514 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1515 return;
1516 }
1517
1518 if (len < 24 + 6) {
1519 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1520 "received from %s - ignored\n",
1521 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1522 return;
1523 }
1524
51fb61e7 1525 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1526 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1527 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1528 "unknown AP (SA=%s BSSID=%s) - "
1529 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1530 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1531 return;
1532 }
1533
51fb61e7 1534 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1535 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1536 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1537 "unknown BSSID (SA=%s BSSID=%s) - "
1538 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1539 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1540 return;
1541 }
1542
1543 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1544 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1545 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1546
0795af57 1547 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1548 "transaction=%d status=%d)\n",
0795af57 1549 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1550 auth_transaction, status_code);
1551
51fb61e7 1552 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1553 /* IEEE 802.11 standard does not require authentication in IBSS
1554 * networks and most implementations do not seem to use it.
1555 * However, try to reply to authentication attempts if someone
1556 * has actually implemented this.
1557 * TODO: Could implement shared key authentication. */
1558 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1559 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1560 "frame (alg=%d transaction=%d)\n",
1561 dev->name, auth_alg, auth_transaction);
1562 return;
1563 }
1564 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1565 }
1566
1567 if (auth_alg != ifsta->auth_alg ||
1568 auth_transaction != ifsta->auth_transaction) {
1569 printk(KERN_DEBUG "%s: unexpected authentication frame "
1570 "(alg=%d transaction=%d)\n",
1571 dev->name, auth_alg, auth_transaction);
1572 return;
1573 }
1574
1575 if (status_code != WLAN_STATUS_SUCCESS) {
1576 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1577 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1578 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1579 u8 algs[3];
1580 const int num_algs = ARRAY_SIZE(algs);
1581 int i, pos;
1582 algs[0] = algs[1] = algs[2] = 0xff;
1583 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1584 algs[0] = WLAN_AUTH_OPEN;
1585 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1586 algs[1] = WLAN_AUTH_SHARED_KEY;
1587 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1588 algs[2] = WLAN_AUTH_LEAP;
1589 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1590 pos = 0;
1591 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1592 pos = 1;
1593 else
1594 pos = 2;
1595 for (i = 0; i < num_algs; i++) {
1596 pos++;
1597 if (pos >= num_algs)
1598 pos = 0;
1599 if (algs[pos] == ifsta->auth_alg ||
1600 algs[pos] == 0xff)
1601 continue;
1602 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1603 !ieee80211_sta_wep_configured(dev))
1604 continue;
1605 ifsta->auth_alg = algs[pos];
1606 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1607 "next try\n",
1608 dev->name, ifsta->auth_alg);
1609 break;
1610 }
1611 }
1612 return;
1613 }
1614
1615 switch (ifsta->auth_alg) {
1616 case WLAN_AUTH_OPEN:
1617 case WLAN_AUTH_LEAP:
1618 ieee80211_auth_completed(dev, ifsta);
1619 break;
1620 case WLAN_AUTH_SHARED_KEY:
1621 if (ifsta->auth_transaction == 4)
1622 ieee80211_auth_completed(dev, ifsta);
1623 else
1624 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1625 break;
1626 }
1627}
1628
1629
1630static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1631 struct ieee80211_if_sta *ifsta,
1632 struct ieee80211_mgmt *mgmt,
1633 size_t len)
1634{
1635 u16 reason_code;
0795af57 1636 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1637
1638 if (len < 24 + 2) {
1639 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1640 "received from %s - ignored\n",
1641 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1642 return;
1643 }
1644
1645 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1646 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1647 "unknown AP (SA=%s BSSID=%s) - "
1648 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1649 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1650 return;
1651 }
1652
1653 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1654
0795af57 1655 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1656 " (reason=%d)\n",
0795af57 1657 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1658
d6f2da5b 1659 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1660 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1661 }
1662
1663 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1664 ifsta->state == IEEE80211_ASSOCIATE ||
1665 ifsta->state == IEEE80211_ASSOCIATED) {
1666 ifsta->state = IEEE80211_AUTHENTICATE;
1667 mod_timer(&ifsta->timer, jiffies +
1668 IEEE80211_RETRY_AUTH_INTERVAL);
1669 }
1670
1671 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1672 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1673}
1674
1675
1676static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1677 struct ieee80211_if_sta *ifsta,
1678 struct ieee80211_mgmt *mgmt,
1679 size_t len)
1680{
1681 u16 reason_code;
0795af57 1682 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1683
1684 if (len < 24 + 2) {
1685 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1686 "received from %s - ignored\n",
1687 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1688 return;
1689 }
1690
1691 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1692 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1693 "unknown AP (SA=%s BSSID=%s) - "
1694 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1695 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1696 return;
1697 }
1698
1699 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1700
0795af57 1701 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1702 " (reason=%d)\n",
0795af57 1703 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1704
d6f2da5b 1705 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1706 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1707
1708 if (ifsta->state == IEEE80211_ASSOCIATED) {
1709 ifsta->state = IEEE80211_ASSOCIATE;
1710 mod_timer(&ifsta->timer, jiffies +
1711 IEEE80211_RETRY_AUTH_INTERVAL);
1712 }
1713
1714 ieee80211_set_disassoc(dev, ifsta, 0);
1715}
1716
1717
471b3efd 1718static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1719 struct ieee80211_if_sta *ifsta,
1720 struct ieee80211_mgmt *mgmt,
1721 size_t len,
1722 int reassoc)
1723{
471b3efd
JB		 1724 struct ieee80211_local *local = sdata->local;
1725 struct net_device *dev = sdata->dev;
8318d78a 1726 struct ieee80211_supported_band *sband;
f0706e82 1727 struct sta_info *sta;
8318d78a 1728 u64 rates, basic_rates;
f0706e82
JB		 1729 u16 capab_info, status_code, aid;
1730 struct ieee802_11_elems elems;
471b3efd 1731 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1732 u8 *pos;
1733 int i, j;
0795af57 1734 DECLARE_MAC_BUF(mac);
8318d78a 1735 bool have_higher_than_11mbit = false;
f0706e82
JB		 1736
1737 /* AssocResp and ReassocResp have identical structure, so process both
1738 * of them in this function. */
1739
1740 if (ifsta->state != IEEE80211_ASSOCIATE) {
1741 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1742 "%s, but not in associate state - ignored\n",
1743 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1744 return;
1745 }
1746
1747 if (len < 24 + 6) {
1748 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1749 "received from %s - ignored\n",
1750 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1751 return;
1752 }
1753
1754 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1755 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1756 "unknown AP (SA=%s BSSID=%s) - "
1757 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1758 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1759 return;
1760 }
1761
1762 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1763 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1764 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1765
0795af57 1766 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1767 "status=%d aid=%d)\n",
0795af57 1768 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1769 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1770
1771 if (status_code != WLAN_STATUS_SUCCESS) {
1772 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1773 dev->name, status_code);
8a69aa93
DD		 1774 /* if this was a reassociation, ensure we try a "full"
1775 * association next time. This works around some broken APs
1776 * which do not correctly reject reassociation requests. */
d6f2da5b 1777 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1778 return;
1779 }
1780
1dd84aa2
JB		 1781 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1782 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1783 "set\n", dev->name, aid);
1784 aid &= ~(BIT(15) | BIT(14));
1785
f0706e82 1786 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1787 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1788
1789 if (!elems.supp_rates) {
1790 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1791 dev->name);
1792 return;
1793 }
1794
1795 printk(KERN_DEBUG "%s: associated\n", dev->name);
1796 ifsta->aid = aid;
1797 ifsta->ap_capab = capab_info;
1798
1799 kfree(ifsta->assocresp_ies);
1800 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1801 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1802 if (ifsta->assocresp_ies)
1803 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1804
f0706e82
JB		 1805 /* Add STA entry for the AP */
1806 sta = sta_info_get(local, ifsta->bssid);
1807 if (!sta) {
1808 struct ieee80211_sta_bss *bss;
0ec0b7ac 1809 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1810 if (!sta) {
1811 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1812 " AP\n", dev->name);
1813 return;
1814 }
65c107ab 1815 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 1816 local->hw.conf.channel->center_freq,
cffdd30d 1817 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1818 if (bss) {
1819 sta->last_rssi = bss->rssi;
1820 sta->last_signal = bss->signal;
1821 sta->last_noise = bss->noise;
1822 ieee80211_rx_bss_put(dev, bss);
1823 }
1824 }
1825
1826 sta->dev = dev;
238814fd
JB		 1827 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1828 WLAN_STA_AUTHORIZED;
f0706e82
JB		 1829
1830 rates = 0;
8318d78a
JB		 1831 basic_rates = 0;
1832 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1833
f0706e82
JB		 1834 for (i = 0; i < elems.supp_rates_len; i++) {
1835 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1836
1837 if (rate > 110)
1838 have_higher_than_11mbit = true;
1839
1840 for (j = 0; j < sband->n_bitrates; j++) {
1841 if (sband->bitrates[j].bitrate == rate)
f0706e82 1842 rates |= BIT(j);
8318d78a
JB		 1843 if (elems.supp_rates[i] & 0x80)
1844 basic_rates |= BIT(j);
1845 }
f0706e82 1846 }
8318d78a 1847
f0706e82
JB		 1848 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1849 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1850
1851 if (rate > 110)
1852 have_higher_than_11mbit = true;
1853
1854 for (j = 0; j < sband->n_bitrates; j++) {
1855 if (sband->bitrates[j].bitrate == rate)
f0706e82 1856 rates |= BIT(j);
8318d78a
JB		 1857 if (elems.ext_supp_rates[i] & 0x80)
1858 basic_rates |= BIT(j);
1859 }
f0706e82 1860 }
8318d78a
JB		 1861
1862 sta->supp_rates[local->hw.conf.channel->band] = rates;
1863 sdata->basic_rates = basic_rates;
1864
1865 /* cf. IEEE 802.11 9.2.12 */
1866 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1867 have_higher_than_11mbit)
1868 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1869 else
1870 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1871
d3c990fb
RR		 1872 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1873 local->ops->conf_ht) {
1874 struct ieee80211_ht_bss_info bss_info;
1875
1876 ieee80211_ht_cap_ie_to_ht_info(
1877 (struct ieee80211_ht_cap *)
1878 elems.ht_cap_elem, &sta->ht_info);
1879 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1880 (struct ieee80211_ht_addt_info *)
1881 elems.ht_info_elem, &bss_info);
1882 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1883 }
1884
f0706e82
JB		 1885 rate_control_rate_init(sta, local);
1886
d6f2da5b 1887 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1888 sta->flags |= WLAN_STA_WME;
1889 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1890 elems.wmm_param_len);
1891 }
1892
8318d78a
JB		 1893 /* set AID, ieee80211_set_associated() will tell the driver */
1894 bss_conf->aid = aid;
1895 ieee80211_set_associated(dev, ifsta, 1);
f0706e82
JB		 1896
1897 sta_info_put(sta);
1898
1899 ieee80211_associated(dev, ifsta);
1900}
1901
1902
1903/* Caller must hold local->sta_bss_lock */
1904static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1905 struct ieee80211_sta_bss *bss)
1906{
1907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1908 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1909 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1910}
1911
1912
1913/* Caller must hold local->sta_bss_lock */
1914static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1915 struct ieee80211_sta_bss *bss)
1916{
1917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1918 struct ieee80211_sta_bss *b, *prev = NULL;
1919 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1920 while (b) {
1921 if (b == bss) {
1922 if (!prev)
1923 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1924 bss->hnext;
1925 else
1926 prev->hnext = bss->hnext;
1927 break;
1928 }
1929 prev = b;
1930 b = b->hnext;
1931 }
1932}
1933
1934
1935static struct ieee80211_sta_bss *
8318d78a 1936ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 1937 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1938{
1939 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1940 struct ieee80211_sta_bss *bss;
1941
dd00cc48 1942 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1943 if (!bss)
1944 return NULL;
f0706e82
JB		 1945 atomic_inc(&bss->users);
1946 atomic_inc(&bss->users);
1947 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 1948 bss->freq = freq;
cffdd30d
JL		 1949 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1950 memcpy(bss->ssid, ssid, ssid_len);
1951 bss->ssid_len = ssid_len;
1952 }
f0706e82
JB		 1953
1954 spin_lock_bh(&local->sta_bss_lock);
1955 /* TODO: order by RSSI? */
1956 list_add_tail(&bss->list, &local->sta_bss_list);
1957 __ieee80211_rx_bss_hash_add(dev, bss);
1958 spin_unlock_bh(&local->sta_bss_lock);
1959 return bss;
1960}
1961
1962
1963static struct ieee80211_sta_bss *
8318d78a 1964ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 1965 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1966{
1967 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1968 struct ieee80211_sta_bss *bss;
1969
1970 spin_lock_bh(&local->sta_bss_lock);
1971 bss = local->sta_bss_hash[STA_HASH(bssid)];
1972 while (bss) {
cffdd30d 1973 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 1974 bss->freq == freq &&
cffdd30d
JL		 1975 bss->ssid_len == ssid_len &&
1976 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 1977 atomic_inc(&bss->users);
1978 break;
1979 }
1980 bss = bss->hnext;
1981 }
1982 spin_unlock_bh(&local->sta_bss_lock);
1983 return bss;
1984}
1985
1986
1987static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1988{
1989 kfree(bss->wpa_ie);
1990 kfree(bss->rsn_ie);
1991 kfree(bss->wmm_ie);
c7153508 1992 kfree(bss->ht_ie);
f0706e82
JB		 1993 kfree(bss);
1994}
1995
1996
1997static void ieee80211_rx_bss_put(struct net_device *dev,
1998 struct ieee80211_sta_bss *bss)
1999{
2000 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2001 if (!atomic_dec_and_test(&bss->users))
2002 return;
2003
2004 spin_lock_bh(&local->sta_bss_lock);
2005 __ieee80211_rx_bss_hash_del(dev, bss);
2006 list_del(&bss->list);
2007 spin_unlock_bh(&local->sta_bss_lock);
2008 ieee80211_rx_bss_free(bss);
2009}
2010
2011
2012void ieee80211_rx_bss_list_init(struct net_device *dev)
2013{
2014 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2015 spin_lock_init(&local->sta_bss_lock);
2016 INIT_LIST_HEAD(&local->sta_bss_list);
2017}
2018
2019
2020void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2021{
2022 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2023 struct ieee80211_sta_bss *bss, *tmp;
2024
2025 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2026 ieee80211_rx_bss_put(dev, bss);
2027}
2028
2029
a607268a
BR		 2030static int ieee80211_sta_join_ibss(struct net_device *dev,
2031 struct ieee80211_if_sta *ifsta,
2032 struct ieee80211_sta_bss *bss)
2033{
2034 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2035 int res, rates, i, j;
2036 struct sk_buff *skb;
2037 struct ieee80211_mgmt *mgmt;
2038 struct ieee80211_tx_control control;
2039 struct rate_selection ratesel;
2040 u8 *pos;
2041 struct ieee80211_sub_if_data *sdata;
2042 struct ieee80211_supported_band *sband;
2043
2044 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2045
2046 /* Remove possible STA entries from other IBSS networks. */
2047 sta_info_flush(local, NULL);
2048
2049 if (local->ops->reset_tsf) {
2050 /* Reset own TSF to allow time synchronization work. */
2051 local->ops->reset_tsf(local_to_hw(local));
2052 }
2053 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2054 res = ieee80211_if_config(dev);
2055 if (res)
2056 return res;
2057
2058 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2059
2060 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2061 sdata->drop_unencrypted = bss->capability &
2062 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2063
2064 res = ieee80211_set_freq(local, bss->freq);
2065
2066 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2067 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2068 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2069 return -1;
2070 }
2071
2072 /* Set beacon template */
2073 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2074 do {
2075 if (!skb)
2076 break;
2077
2078 skb_reserve(skb, local->hw.extra_tx_headroom);
2079
2080 mgmt = (struct ieee80211_mgmt *)
2081 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2082 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2083 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2084 IEEE80211_STYPE_BEACON);
2085 memset(mgmt->da, 0xff, ETH_ALEN);
2086 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2087 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2088 mgmt->u.beacon.beacon_int =
2089 cpu_to_le16(local->hw.conf.beacon_int);
2090 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2091
2092 pos = skb_put(skb, 2 + ifsta->ssid_len);
2093 *pos++ = WLAN_EID_SSID;
2094 *pos++ = ifsta->ssid_len;
2095 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2096
2097 rates = bss->supp_rates_len;
2098 if (rates > 8)
2099 rates = 8;
2100 pos = skb_put(skb, 2 + rates);
2101 *pos++ = WLAN_EID_SUPP_RATES;
2102 *pos++ = rates;
2103 memcpy(pos, bss->supp_rates, rates);
2104
2105 if (bss->band == IEEE80211_BAND_2GHZ) {
2106 pos = skb_put(skb, 2 + 1);
2107 *pos++ = WLAN_EID_DS_PARAMS;
2108 *pos++ = 1;
2109 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2110 }
2111
2112 pos = skb_put(skb, 2 + 2);
2113 *pos++ = WLAN_EID_IBSS_PARAMS;
2114 *pos++ = 2;
2115 /* FIX: set ATIM window based on scan results */
2116 *pos++ = 0;
2117 *pos++ = 0;
2118
2119 if (bss->supp_rates_len > 8) {
2120 rates = bss->supp_rates_len - 8;
2121 pos = skb_put(skb, 2 + rates);
2122 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2123 *pos++ = rates;
2124 memcpy(pos, &bss->supp_rates[8], rates);
2125 }
2126
2127 memset(&control, 0, sizeof(control));
2128 rate_control_get_rate(dev, sband, skb, &ratesel);
2129 if (!ratesel.rate) {
2130 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2131 "for IBSS beacon\n", dev->name);
2132 break;
2133 }
2134 control.vif = &sdata->vif;
2135 control.tx_rate = ratesel.rate;
2136 if (sdata->bss_conf.use_short_preamble &&
2137 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2138 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2139 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2140 control.flags |= IEEE80211_TXCTL_NO_ACK;
2141 control.retry_limit = 1;
2142
2143 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2144 if (ifsta->probe_resp) {
2145 mgmt = (struct ieee80211_mgmt *)
2146 ifsta->probe_resp->data;
2147 mgmt->frame_control =
2148 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2149 IEEE80211_STYPE_PROBE_RESP);
2150 } else {
2151 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2152 "template for IBSS\n", dev->name);
2153 }
2154
2155 if (local->ops->beacon_update &&
2156 local->ops->beacon_update(local_to_hw(local),
2157 skb, &control) == 0) {
2158 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2159 "template\n", dev->name);
2160 skb = NULL;
2161 }
2162
2163 rates = 0;
2164 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2165 for (i = 0; i < bss->supp_rates_len; i++) {
2166 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2167 for (j = 0; j < sband->n_bitrates; j++)
2168 if (sband->bitrates[j].bitrate == bitrate)
2169 rates |= BIT(j);
2170 }
2171 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2172 } while (0);
2173
2174 if (skb) {
2175 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2176 "template\n", dev->name);
2177 dev_kfree_skb(skb);
2178 }
2179
2180 ifsta->state = IEEE80211_IBSS_JOINED;
2181 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2182
2183 ieee80211_rx_bss_put(dev, bss);
2184
2185 return res;
2186}
2187
2188
f0706e82
JB		 2189static void ieee80211_rx_bss_info(struct net_device *dev,
2190 struct ieee80211_mgmt *mgmt,
2191 size_t len,
2192 struct ieee80211_rx_status *rx_status,
2193 int beacon)
2194{
2195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2196 struct ieee802_11_elems elems;
2197 size_t baselen;
8318d78a 2198 int freq, clen;
f0706e82
JB		 2199 struct ieee80211_sta_bss *bss;
2200 struct sta_info *sta;
2201 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2202 u64 beacon_timestamp, rx_timestamp;
0795af57
JP		 2203 DECLARE_MAC_BUF(mac);
2204 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2205
2206 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2207 return; /* ignore ProbeResp to foreign address */
2208
2209#if 0
0795af57 2210 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2211 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2212 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2213#endif
2214
2215 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2216 if (baselen > len)
2217 return;
2218
9d9bf77d 2219 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
67a4cce4 2220 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2221
51fb61e7 2222 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2223 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2224 (sta = sta_info_get(local, mgmt->sa))) {
8318d78a
JB		 2225 struct ieee80211_supported_band *sband;
2226 struct ieee80211_rate *bitrates;
f0706e82 2227 size_t num_rates;
8318d78a 2228 u64 supp_rates, prev_rates;
f0706e82
JB		 2229 int i, j;
2230
8318d78a 2231 sband = local->hw.wiphy->bands[rx_status->band];
ece8eddd 2232
8318d78a
JB		 2233 if (!sband) {
2234 WARN_ON(1);
2235 sband = local->hw.wiphy->bands[
2236 local->hw.conf.channel->band];
ece8eddd 2237 }
8318d78a
JB		 2238
2239 bitrates = sband->bitrates;
2240 num_rates = sband->n_bitrates;
f0706e82
JB		 2241
2242 supp_rates = 0;
2243 for (i = 0; i < elems.supp_rates_len +
2244 elems.ext_supp_rates_len; i++) {
2245 u8 rate = 0;
2246 int own_rate;
2247 if (i < elems.supp_rates_len)
2248 rate = elems.supp_rates[i];
2249 else if (elems.ext_supp_rates)
2250 rate = elems.ext_supp_rates
2251 [i - elems.supp_rates_len];
2252 own_rate = 5 * (rate & 0x7f);
f0706e82 2253 for (j = 0; j < num_rates; j++)
8318d78a 2254 if (bitrates[j].bitrate == own_rate)
f0706e82
JB		 2255 supp_rates |= BIT(j);
2256 }
2257
8318d78a
JB		 2258 prev_rates = sta->supp_rates[rx_status->band];
2259 sta->supp_rates[rx_status->band] &= supp_rates;
2260 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2261 /* No matching rates - this should not really happen.
2262 * Make sure that at least one rate is marked
2263 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2264 sta->supp_rates[rx_status->band] =
2265 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2266 }
8318d78a 2267 if (sta->supp_rates[rx_status->band] != prev_rates) {
f0706e82 2268 printk(KERN_DEBUG "%s: updated supp_rates set for "
8318d78a
JB		 2269 "%s based on beacon info (0x%llx & 0x%llx -> "
2270 "0x%llx)\n",
2271 dev->name, print_mac(mac, sta->addr),
2272 (unsigned long long) prev_rates,
2273 (unsigned long long) supp_rates,
2274 (unsigned long long) sta->supp_rates[rx_status->band]);
f0706e82
JB		 2275 }
2276 sta_info_put(sta);
2277 }
2278
2279 if (!elems.ssid)
2280 return;
2281
2282 if (elems.ds_params && elems.ds_params_len == 1)
8318d78a 2283 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
f0706e82 2284 else
8318d78a 2285 freq = rx_status->freq;
f0706e82 2286
8318d78a 2287 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
cffdd30d 2288 elems.ssid, elems.ssid_len);
f0706e82 2289 if (!bss) {
8318d78a 2290 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
cffdd30d 2291 elems.ssid, elems.ssid_len);
f0706e82
JB		 2292 if (!bss)
2293 return;
2294 } else {
2295#if 0
2296 /* TODO: order by RSSI? */
2297 spin_lock_bh(&local->sta_bss_lock);
2298 list_move_tail(&bss->list, &local->sta_bss_list);
2299 spin_unlock_bh(&local->sta_bss_lock);
2300#endif
2301 }
2302
8318d78a
JB		 2303 bss->band = rx_status->band;
2304
9d9bf77d
BR		 2305 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2306 bss->probe_resp && beacon) {
2307 /* STA mode:
2308 * Do not allow beacon to override data from Probe Response. */
f0706e82
JB		 2309 ieee80211_rx_bss_put(dev, bss);
2310 return;
2311 }
2312
5628221c
DD		 2313 /* save the ERP value so that it is available at association time */
2314 if (elems.erp_info && elems.erp_info_len >= 1) {
2315 bss->erp_value = elems.erp_info[0];
2316 bss->has_erp_value = 1;
2317 }
2318
f0706e82
JB		 2319 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2320 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2321
2322 bss->supp_rates_len = 0;
2323 if (elems.supp_rates) {
2324 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2325 if (clen > elems.supp_rates_len)
2326 clen = elems.supp_rates_len;
2327 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2328 clen);
2329 bss->supp_rates_len += clen;
2330 }
2331 if (elems.ext_supp_rates) {
2332 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2333 if (clen > elems.ext_supp_rates_len)
2334 clen = elems.ext_supp_rates_len;
2335 memcpy(&bss->supp_rates[bss->supp_rates_len],
2336 elems.ext_supp_rates, clen);
2337 bss->supp_rates_len += clen;
2338 }
2339
2340 if (elems.wpa &&
2341 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2342 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2343 kfree(bss->wpa_ie);
2344 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2345 if (bss->wpa_ie) {
2346 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2347 bss->wpa_ie_len = elems.wpa_len + 2;
2348 } else
2349 bss->wpa_ie_len = 0;
2350 } else if (!elems.wpa && bss->wpa_ie) {
2351 kfree(bss->wpa_ie);
2352 bss->wpa_ie = NULL;
2353 bss->wpa_ie_len = 0;
2354 }
2355
2356 if (elems.rsn &&
2357 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2358 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2359 kfree(bss->rsn_ie);
2360 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2361 if (bss->rsn_ie) {
2362 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2363 bss->rsn_ie_len = elems.rsn_len + 2;
2364 } else
2365 bss->rsn_ie_len = 0;
2366 } else if (!elems.rsn && bss->rsn_ie) {
2367 kfree(bss->rsn_ie);
2368 bss->rsn_ie = NULL;
2369 bss->rsn_ie_len = 0;
2370 }
2371
2372 if (elems.wmm_param &&
2373 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2374 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2375 kfree(bss->wmm_ie);
2376 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2377 if (bss->wmm_ie) {
2378 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2379 elems.wmm_param_len + 2);
2380 bss->wmm_ie_len = elems.wmm_param_len + 2;
2381 } else
2382 bss->wmm_ie_len = 0;
2383 } else if (!elems.wmm_param && bss->wmm_ie) {
2384 kfree(bss->wmm_ie);
2385 bss->wmm_ie = NULL;
2386 bss->wmm_ie_len = 0;
2387 }
c7153508
RR		 2388 if (elems.ht_cap_elem &&
2389 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2390 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2391 kfree(bss->ht_ie);
2392 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2393 if (bss->ht_ie) {
2394 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2395 elems.ht_cap_elem_len + 2);
2396 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2397 } else
2398 bss->ht_ie_len = 0;
2399 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2400 kfree(bss->ht_ie);
2401 bss->ht_ie = NULL;
2402 bss->ht_ie_len = 0;
2403 }
f0706e82 2404
9d9bf77d 2405 bss->timestamp = beacon_timestamp;
f0706e82
JB		 2406 bss->last_update = jiffies;
2407 bss->rssi = rx_status->ssi;
2408 bss->signal = rx_status->signal;
2409 bss->noise = rx_status->noise;
2410 if (!beacon)
2411 bss->probe_resp++;
9d9bf77d
BR		 2412
2413 /* check if we need to merge IBSS */
2414 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2415 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2416 mgmt->u.beacon.capab_info & WLAN_CAPABILITY_IBSS &&
2417 bss->freq == local->oper_channel->center_freq &&
2418 elems.ssid_len == sdata->u.sta.ssid_len &&
2419 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2420 if (rx_status->flag & RX_FLAG_TSFT) {
2421 /* in order for correct IBSS merging we need mactime
2422 *
2423 * since mactime is defined as the time the first data
2424 * symbol of the frame hits the PHY, and the timestamp
2425 * of the beacon is defined as "the time that the data
2426 * symbol containing the first bit of the timestamp is
2427 * transmitted to the PHY plus the transmitting STA’s
2428 * delays through its local PHY from the MAC-PHY
2429 * interface to its interface with the WM"
2430 * (802.11 11.1.2) - equals the time this bit arrives at
2431 * the receiver - we have to take into account the
2432 * offset between the two.
2433 * e.g: at 1 MBit that means mactime is 192 usec earlier
2434 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2435 */
2436 int rate = local->hw.wiphy->bands[rx_status->band]->
2437 bitrates[rx_status->rate_idx].bitrate;
2438 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2439 } else if (local && local->ops && local->ops->get_tsf)
2440 /* second best option: get current TSF */
2441 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2442 else
2443 /* can't merge without knowing the TSF */
2444 rx_timestamp = -1LLU;
2445#ifdef CONFIG_MAC80211_IBSS_DEBUG
2446 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2447 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2448 print_mac(mac, mgmt->sa),
2449 print_mac(mac2, mgmt->bssid),
2450 (unsigned long long)rx_timestamp,
2451 (unsigned long long)beacon_timestamp,
2452 (unsigned long long)(rx_timestamp - beacon_timestamp),
2453 jiffies);
2454#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2455 if (beacon_timestamp > rx_timestamp) {
d97cf015
PR		 2456#ifdef CONFIG_MAC80211_IBSS_DEBUG
2457 if (net_ratelimit())
9d9bf77d
BR		 2458 printk(KERN_DEBUG "%s: beacon TSF higher than "
2459 "local TSF - IBSS merge with BSSID %s\n",
2460 dev->name, print_mac(mac, mgmt->bssid));
d97cf015 2461#endif /* CONFIG_MAC80211_IBSS_DEBUG */
9d9bf77d
BR		 2462 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2463 ieee80211_ibss_add_sta(dev, NULL,
2464 mgmt->bssid, mgmt->sa);
2465 }
2466 }
2467
f0706e82
JB		 2468 ieee80211_rx_bss_put(dev, bss);
2469}
2470
2471
2472static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2473 struct ieee80211_mgmt *mgmt,
2474 size_t len,
2475 struct ieee80211_rx_status *rx_status)
2476{
2477 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2478}
2479
2480
2481static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2482 struct ieee80211_mgmt *mgmt,
2483 size_t len,
2484 struct ieee80211_rx_status *rx_status)
2485{
f0706e82
JB		 2486 struct ieee80211_sub_if_data *sdata;
2487 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2488 size_t baselen;
2489 struct ieee802_11_elems elems;
d3c990fb
RR		 2490 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2491 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2492 u32 changed = 0;
f0706e82
JB		 2493
2494 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2495
2496 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2497 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2498 return;
2499 ifsta = &sdata->u.sta;
2500
d6f2da5b 2501 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2502 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2503 return;
2504
2505 /* Process beacon from the current BSS */
2506 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2507 if (baselen > len)
2508 return;
2509
67a4cce4 2510 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2511
5628221c 2512 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2513 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
f0706e82 2514
d3c990fb
RR		 2515 if (elems.ht_cap_elem && elems.ht_info_elem &&
2516 elems.wmm_param && local->ops->conf_ht &&
2517 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2518 struct ieee80211_ht_bss_info bss_info;
2519
2520 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2521 (struct ieee80211_ht_addt_info *)
2522 elems.ht_info_elem, &bss_info);
2523 /* check if AP changed bss inforamation */
2524 if ((conf->ht_bss_conf.primary_channel !=
2525 bss_info.primary_channel) ||
2526 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2527 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2528 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2529 &bss_info);
2530 }
2531
d6f2da5b 2532 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2533 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2534 elems.wmm_param_len);
2535 }
471b3efd
JB		 2536
2537 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2538}
2539
2540
2541static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2542 struct ieee80211_if_sta *ifsta,
2543 struct ieee80211_mgmt *mgmt,
2544 size_t len,
2545 struct ieee80211_rx_status *rx_status)
2546{
2547 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2548 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2549 int tx_last_beacon;
2550 struct sk_buff *skb;
2551 struct ieee80211_mgmt *resp;
2552 u8 *pos, *end;
0795af57
JP		 2553 DECLARE_MAC_BUF(mac);
2554#ifdef CONFIG_MAC80211_IBSS_DEBUG
2555 DECLARE_MAC_BUF(mac2);
2556 DECLARE_MAC_BUF(mac3);
2557#endif
f0706e82 2558
51fb61e7 2559 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2560 ifsta->state != IEEE80211_IBSS_JOINED ||
2561 len < 24 + 2 || !ifsta->probe_resp)
2562 return;
2563
2564 if (local->ops->tx_last_beacon)
2565 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2566 else
2567 tx_last_beacon = 1;
2568
2569#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2570 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2571 "%s (tx_last_beacon=%d)\n",
2572 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2573 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2574#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2575
2576 if (!tx_last_beacon)
2577 return;
2578
2579 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2580 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2581 return;
2582
2583 end = ((u8 *) mgmt) + len;
2584 pos = mgmt->u.probe_req.variable;
2585 if (pos[0] != WLAN_EID_SSID ||
2586 pos + 2 + pos[1] > end) {
2587 if (net_ratelimit()) {
2588 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2589 "from %s\n",
2590 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2591 }
2592 return;
2593 }
2594 if (pos[1] != 0 &&
2595 (pos[1] != ifsta->ssid_len ||
2596 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2597 /* Ignore ProbeReq for foreign SSID */
2598 return;
2599 }
2600
2601 /* Reply with ProbeResp */
0ec0b7ac 2602 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2603 if (!skb)
2604 return;
2605
2606 resp = (struct ieee80211_mgmt *) skb->data;
2607 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2608#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2609 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2610 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2611#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2612 ieee80211_sta_tx(dev, skb, 0);
2613}
2614
4e20cb29
JB		 2615static void ieee80211_rx_mgmt_action(struct net_device *dev,
2616 struct ieee80211_if_sta *ifsta,
2617 struct ieee80211_mgmt *mgmt,
2618 size_t len)
9f985b0e
RR		 2619{
2620 if (len < IEEE80211_MIN_ACTION_SIZE)
2621 return;
2622
2623 switch (mgmt->u.action.category) {
2624 case WLAN_CATEGORY_BACK:
2625 switch (mgmt->u.action.u.addba_req.action_code) {
2626 case WLAN_ACTION_ADDBA_REQ:
2627 if (len < (IEEE80211_MIN_ACTION_SIZE +
2628 sizeof(mgmt->u.action.u.addba_req)))
2629 break;
2630 ieee80211_sta_process_addba_request(dev, mgmt, len);
2631 break;
eadc8d9e
RR		 2632 case WLAN_ACTION_ADDBA_RESP:
2633 if (len < (IEEE80211_MIN_ACTION_SIZE +
2634 sizeof(mgmt->u.action.u.addba_resp)))
2635 break;
2636 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2637 break;
688b88a4
RR		 2638 case WLAN_ACTION_DELBA:
2639 if (len < (IEEE80211_MIN_ACTION_SIZE +
2640 sizeof(mgmt->u.action.u.delba)))
2641 break;
2642 ieee80211_sta_process_delba(dev, mgmt, len);
2643 break;
9f985b0e
RR		 2644 default:
2645 if (net_ratelimit())
688b88a4 2646 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2647 dev->name);
2648 break;
2649 }
2650 break;
2651 default:
2652 break;
2653 }
2654}
f0706e82
JB		 2655
2656void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2657 struct ieee80211_rx_status *rx_status)
2658{
2659 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2660 struct ieee80211_sub_if_data *sdata;
2661 struct ieee80211_if_sta *ifsta;
2662 struct ieee80211_mgmt *mgmt;
2663 u16 fc;
2664
2665 if (skb->len < 24)
2666 goto fail;
2667
2668 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2669 ifsta = &sdata->u.sta;
2670
2671 mgmt = (struct ieee80211_mgmt *) skb->data;
2672 fc = le16_to_cpu(mgmt->frame_control);
2673
2674 switch (fc & IEEE80211_FCTL_STYPE) {
2675 case IEEE80211_STYPE_PROBE_REQ:
2676 case IEEE80211_STYPE_PROBE_RESP:
2677 case IEEE80211_STYPE_BEACON:
2678 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2679 case IEEE80211_STYPE_AUTH:
2680 case IEEE80211_STYPE_ASSOC_RESP:
2681 case IEEE80211_STYPE_REASSOC_RESP:
2682 case IEEE80211_STYPE_DEAUTH:
2683 case IEEE80211_STYPE_DISASSOC:
9f985b0e 2684 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2685 skb_queue_tail(&ifsta->skb_queue, skb);
2686 queue_work(local->hw.workqueue, &ifsta->work);
2687 return;
2688 default:
2689 printk(KERN_DEBUG "%s: received unknown management frame - "
2690 "stype=%d\n", dev->name,
2691 (fc & IEEE80211_FCTL_STYPE) >> 4);
2692 break;
2693 }
2694
2695 fail:
2696 kfree_skb(skb);
2697}
2698
2699
2700static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2701 struct sk_buff *skb)
2702{
2703 struct ieee80211_rx_status *rx_status;
2704 struct ieee80211_sub_if_data *sdata;
2705 struct ieee80211_if_sta *ifsta;
2706 struct ieee80211_mgmt *mgmt;
2707 u16 fc;
2708
2709 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2710 ifsta = &sdata->u.sta;
2711
2712 rx_status = (struct ieee80211_rx_status *) skb->cb;
2713 mgmt = (struct ieee80211_mgmt *) skb->data;
2714 fc = le16_to_cpu(mgmt->frame_control);
2715
2716 switch (fc & IEEE80211_FCTL_STYPE) {
2717 case IEEE80211_STYPE_PROBE_REQ:
2718 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2719 rx_status);
2720 break;
2721 case IEEE80211_STYPE_PROBE_RESP:
2722 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2723 break;
2724 case IEEE80211_STYPE_BEACON:
2725 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2726 break;
2727 case IEEE80211_STYPE_AUTH:
2728 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2729 break;
2730 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2731 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2732 break;
2733 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2734 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2735 break;
2736 case IEEE80211_STYPE_DEAUTH:
2737 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2738 break;
2739 case IEEE80211_STYPE_DISASSOC:
2740 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2741 break;
9f985b0e
RR		 2742 case IEEE80211_STYPE_ACTION:
2743 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2744 break;
f0706e82
JB		 2745 }
2746
2747 kfree_skb(skb);
2748}
2749
2750
9ae54c84 2751ieee80211_rx_result
ece8eddd
ZY		 2752ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2753 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2754{
2755 struct ieee80211_mgmt *mgmt;
2756 u16 fc;
2757
ece8eddd 2758 if (skb->len < 2)
e4c26add 2759 return RX_DROP_UNUSABLE;
f0706e82
JB		 2760
2761 mgmt = (struct ieee80211_mgmt *) skb->data;
2762 fc = le16_to_cpu(mgmt->frame_control);
2763
ece8eddd 2764 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
9ae54c84 2765 return RX_CONTINUE;
ece8eddd
ZY		 2766
2767 if (skb->len < 24)
e4c26add 2768 return RX_DROP_MONITOR;
ece8eddd 2769
f0706e82
JB		 2770 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2771 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2772 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2773 skb->len, rx_status);
ece8eddd 2774 dev_kfree_skb(skb);
9ae54c84 2775 return RX_QUEUED;
f0706e82
JB		 2776 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2777 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2778 rx_status);
ece8eddd 2779 dev_kfree_skb(skb);
9ae54c84 2780 return RX_QUEUED;
f0706e82
JB		 2781 }
2782 }
9ae54c84 2783 return RX_CONTINUE;
f0706e82
JB		 2784}
2785
2786
2787static int ieee80211_sta_active_ibss(struct net_device *dev)
2788{
2789 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2790 int active = 0;
2791 struct sta_info *sta;
2792
be8755e1 2793 read_lock_bh(&local->sta_lock);
f0706e82
JB		 2794 list_for_each_entry(sta, &local->sta_list, list) {
2795 if (sta->dev == dev &&
2796 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2797 jiffies)) {
2798 active++;
2799 break;
2800 }
2801 }
be8755e1 2802 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 2803
2804 return active;
2805}
2806
2807
2808static void ieee80211_sta_expire(struct net_device *dev)
2809{
2810 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2811 struct sta_info *sta, *tmp;
be8755e1 2812 LIST_HEAD(tmp_list);
0795af57 2813 DECLARE_MAC_BUF(mac);
f0706e82 2814
be8755e1 2815 write_lock_bh(&local->sta_lock);
f0706e82
JB		 2816 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2817 if (time_after(jiffies, sta->last_rx +
2818 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 2819 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2820 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 2821 __sta_info_get(sta);
2822 sta_info_remove(sta);
2823 list_add(&sta->list, &tmp_list);
f0706e82 2824 }
be8755e1
MW		 2825 write_unlock_bh(&local->sta_lock);
2826
2827 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2828 sta_info_free(sta);
2829 sta_info_put(sta);
2830 }
f0706e82
JB		 2831}
2832
2833
2834static void ieee80211_sta_merge_ibss(struct net_device *dev,
2835 struct ieee80211_if_sta *ifsta)
2836{
2837 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2838
2839 ieee80211_sta_expire(dev);
2840 if (ieee80211_sta_active_ibss(dev))
2841 return;
2842
2843 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2844 "IBSS networks with same SSID (merge)\n", dev->name);
2845 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2846}
2847
2848
2849void ieee80211_sta_timer(unsigned long data)
2850{
2851 struct ieee80211_sub_if_data *sdata =
2852 (struct ieee80211_sub_if_data *) data;
2853 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2854 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2855
2856 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2857 queue_work(local->hw.workqueue, &ifsta->work);
2858}
2859
2860
2861void ieee80211_sta_work(struct work_struct *work)
2862{
2863 struct ieee80211_sub_if_data *sdata =
2864 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2865 struct net_device *dev = sdata->dev;
2866 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2867 struct ieee80211_if_sta *ifsta;
2868 struct sk_buff *skb;
2869
2870 if (!netif_running(dev))
2871 return;
2872
ece8eddd 2873 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 2874 return;
2875
51fb61e7
JB		 2876 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2877 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 2878 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 2879 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 2880 return;
2881 }
2882 ifsta = &sdata->u.sta;
2883
2884 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2885 ieee80211_sta_rx_queued_mgmt(dev, skb);
2886
2887 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2888 ifsta->state != IEEE80211_ASSOCIATE &&
2889 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 2890 if (ifsta->scan_ssid_len)
2891 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2892 else
2893 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 2894 return;
2895 }
2896
2897 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2898 if (ieee80211_sta_config_auth(dev, ifsta))
2899 return;
2900 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2901 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2902 return;
2903
2904 switch (ifsta->state) {
2905 case IEEE80211_DISABLED:
2906 break;
2907 case IEEE80211_AUTHENTICATE:
2908 ieee80211_authenticate(dev, ifsta);
2909 break;
2910 case IEEE80211_ASSOCIATE:
2911 ieee80211_associate(dev, ifsta);
2912 break;
2913 case IEEE80211_ASSOCIATED:
2914 ieee80211_associated(dev, ifsta);
2915 break;
2916 case IEEE80211_IBSS_SEARCH:
2917 ieee80211_sta_find_ibss(dev, ifsta);
2918 break;
2919 case IEEE80211_IBSS_JOINED:
2920 ieee80211_sta_merge_ibss(dev, ifsta);
2921 break;
2922 default:
2923 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2924 ifsta->state);
2925 break;
2926 }
2927
2928 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2929 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2930 "mixed-cell disabled - disassociate\n", dev->name);
2931
2932 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2933 ieee80211_set_disassoc(dev, ifsta, 0);
2934 }
2935}
2936
2937
2938static void ieee80211_sta_reset_auth(struct net_device *dev,
2939 struct ieee80211_if_sta *ifsta)
2940{
2941 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2942
2943 if (local->ops->reset_tsf) {
2944 /* Reset own TSF to allow time synchronization work. */
2945 local->ops->reset_tsf(local_to_hw(local));
2946 }
2947
2948 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2949
2950
2951 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2952 ifsta->auth_alg = WLAN_AUTH_OPEN;
2953 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2954 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2955 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2956 ifsta->auth_alg = WLAN_AUTH_LEAP;
2957 else
2958 ifsta->auth_alg = WLAN_AUTH_OPEN;
2959 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2960 ifsta->auth_alg);
2961 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2962 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2963 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2964 netif_carrier_off(dev);
2965}
2966
2967
2968void ieee80211_sta_req_auth(struct net_device *dev,
2969 struct ieee80211_if_sta *ifsta)
2970{
2971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2972 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2973
51fb61e7 2974 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2975 return;
2976
d6f2da5b
JS		 2977 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2978 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2979 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2980 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2981 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2982 queue_work(local->hw.workqueue, &ifsta->work);
2983 }
2984}
2985
2986static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2987 const char *ssid, int ssid_len)
2988{
2989 int tmp, hidden_ssid;
2990
48225709
MW		 2991 if (ssid_len == ifsta->ssid_len &&
2992 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2993 return 1;
2994
d6f2da5b 2995 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2996 return 0;
2997
2998 hidden_ssid = 1;
2999 tmp = ssid_len;
3000 while (tmp--) {
3001 if (ssid[tmp] != '\0') {
3002 hidden_ssid = 0;
3003 break;
3004 }
3005 }
3006
3007 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3008 return 1;
3009
3010 if (ssid_len == 1 && ssid[0] == ' ')
3011 return 1;
3012
3013 return 0;
3014}
3015
3016static int ieee80211_sta_config_auth(struct net_device *dev,
3017 struct ieee80211_if_sta *ifsta)
3018{
3019 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3020 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3021 struct ieee80211_sta_bss *bss, *selected = NULL;
3022 int top_rssi = 0, freq;
3023
d6f2da5b
JS		 3024 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3025 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 3026 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3027 ieee80211_sta_reset_auth(dev, ifsta);
3028 return 0;
3029 }
3030
3031 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3032 freq = local->oper_channel->center_freq;
f0706e82
JB		 3033 list_for_each_entry(bss, &local->sta_bss_list, list) {
3034 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3035 continue;
3036
3037 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3038 !!sdata->default_key)
3039 continue;
3040
d6f2da5b
JS		 3041 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3042 bss->freq != freq)
f0706e82
JB		 3043 continue;
3044
d6f2da5b 3045 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3046 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3047 continue;
3048
d6f2da5b 3049 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3050 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3051 continue;
3052
3053 if (!selected || top_rssi < bss->rssi) {
3054 selected = bss;
3055 top_rssi = bss->rssi;
3056 }
3057 }
3058 if (selected)
3059 atomic_inc(&selected->users);
3060 spin_unlock_bh(&local->sta_bss_lock);
3061
3062 if (selected) {
8318d78a 3063 ieee80211_set_freq(local, selected->freq);
d6f2da5b 3064 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3065 ieee80211_sta_set_ssid(dev, selected->ssid,
3066 selected->ssid_len);
3067 ieee80211_sta_set_bssid(dev, selected->bssid);
3068 ieee80211_rx_bss_put(dev, selected);
3069 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3070 ieee80211_sta_reset_auth(dev, ifsta);
3071 return 0;
3072 } else {
3073 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3074 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3075 ieee80211_sta_start_scan(dev, NULL, 0);
3076 else
3077 ieee80211_sta_start_scan(dev, ifsta->ssid,
3078 ifsta->ssid_len);
f0706e82
JB		 3079 ifsta->state = IEEE80211_AUTHENTICATE;
3080 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3081 } else
3082 ifsta->state = IEEE80211_DISABLED;
3083 }
f0706e82
JB		 3084 return -1;
3085}
3086
f0706e82
JB		 3087
3088static int ieee80211_sta_create_ibss(struct net_device *dev,
3089 struct ieee80211_if_sta *ifsta)
3090{
3091 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3092 struct ieee80211_sta_bss *bss;
cffdd30d 3093 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3094 struct ieee80211_supported_band *sband;
f0706e82
JB		 3095 u8 bssid[ETH_ALEN], *pos;
3096 int i;
0795af57 3097 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3098
3099#if 0
3100 /* Easier testing, use fixed BSSID. */
3101 memset(bssid, 0xfe, ETH_ALEN);
3102#else
3103 /* Generate random, not broadcast, locally administered BSSID. Mix in
3104 * own MAC address to make sure that devices that do not have proper
3105 * random number generator get different BSSID. */
3106 get_random_bytes(bssid, ETH_ALEN);
3107 for (i = 0; i < ETH_ALEN; i++)
3108 bssid[i] ^= dev->dev_addr[i];
3109 bssid[0] &= ~0x01;
3110 bssid[0] |= 0x02;
3111#endif
3112
0795af57
JP		 3113 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3114 dev->name, print_mac(mac, bssid));
f0706e82 3115
8318d78a
JB		 3116 bss = ieee80211_rx_bss_add(dev, bssid,
3117 local->hw.conf.channel->center_freq,
cffdd30d 3118 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3119 if (!bss)
3120 return -ENOMEM;
3121
8318d78a
JB		 3122 bss->band = local->hw.conf.channel->band;
3123 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3124
3125 if (local->hw.conf.beacon_int == 0)
3126 local->hw.conf.beacon_int = 100;
3127 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3128 bss->last_update = jiffies;
3129 bss->capability = WLAN_CAPABILITY_IBSS;
3130 if (sdata->default_key) {
3131 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3132 } else
3133 sdata->drop_unencrypted = 0;
8318d78a 3134 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3135 pos = bss->supp_rates;
8318d78a
JB		 3136 for (i = 0; i < sband->n_bitrates; i++) {
3137 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3138 *pos++ = (u8) (rate / 5);
3139 }
3140
3141 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3142}
3143
3144
3145static int ieee80211_sta_find_ibss(struct net_device *dev,
3146 struct ieee80211_if_sta *ifsta)
3147{
3148 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3149 struct ieee80211_sta_bss *bss;
3150 int found = 0;
3151 u8 bssid[ETH_ALEN];
3152 int active_ibss;
0795af57
JP		 3153 DECLARE_MAC_BUF(mac);
3154 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3155
3156 if (ifsta->ssid_len == 0)
3157 return -EINVAL;
3158
3159 active_ibss = ieee80211_sta_active_ibss(dev);
3160#ifdef CONFIG_MAC80211_IBSS_DEBUG
3161 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3162 dev->name, active_ibss);
3163#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3164 spin_lock_bh(&local->sta_bss_lock);
3165 list_for_each_entry(bss, &local->sta_bss_list, list) {
3166 if (ifsta->ssid_len != bss->ssid_len ||
3167 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3168 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3169 continue;
3170#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3171 printk(KERN_DEBUG " bssid=%s found\n",
3172 print_mac(mac, bss->bssid));
f0706e82
JB		 3173#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3174 memcpy(bssid, bss->bssid, ETH_ALEN);
3175 found = 1;
3176 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3177 break;
3178 }
3179 spin_unlock_bh(&local->sta_bss_lock);
3180
3181#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3182 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3183 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3184#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3185 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3186 (bss = ieee80211_rx_bss_get(dev, bssid,
3187 local->hw.conf.channel->center_freq,
cffdd30d 3188 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3189 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3190 " based on configured SSID\n",
0795af57 3191 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3192 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3193 }
3194#ifdef CONFIG_MAC80211_IBSS_DEBUG
3195 printk(KERN_DEBUG " did not try to join ibss\n");
3196#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3197
3198 /* Selected IBSS not found in current scan results - try to scan */
3199 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3200 !ieee80211_sta_active_ibss(dev)) {
3201 mod_timer(&ifsta->timer, jiffies +
3202 IEEE80211_IBSS_MERGE_INTERVAL);
3203 } else if (time_after(jiffies, local->last_scan_completed +
3204 IEEE80211_SCAN_INTERVAL)) {
3205 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3206 "join\n", dev->name);
3207 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3208 ifsta->ssid_len);
3209 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3210 int interval = IEEE80211_SCAN_INTERVAL;
3211
3212 if (time_after(jiffies, ifsta->ibss_join_req +
3213 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3214 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3215 (!(local->oper_channel->flags &
3216 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3217 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3218 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3219 printk(KERN_DEBUG "%s: IBSS not allowed on"
3220 " %d MHz\n", dev->name,
3221 local->hw.conf.channel->center_freq);
f0706e82
JB		 3222 }
3223
3224 /* No IBSS found - decrease scan interval and continue
3225 * scanning. */
3226 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3227 }
3228
3229 ifsta->state = IEEE80211_IBSS_SEARCH;
3230 mod_timer(&ifsta->timer, jiffies + interval);
3231 return 0;
3232 }
3233
3234 return 0;
3235}
3236
3237
3238int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3239{
8318d78a 3240 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 3241 struct ieee80211_if_sta *ifsta;
3242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3243
3244 if (len > IEEE80211_MAX_SSID_LEN)
3245 return -EINVAL;
3246
3247 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3248 * not defined. */
3249 if (local->ops->conf_tx) {
3250 struct ieee80211_tx_queue_params qparam;
3251 int i;
3252
3253 memset(&qparam, 0, sizeof(qparam));
8318d78a 3254
f0706e82 3255 qparam.aifs = 2;
8318d78a
JB		 3256
3257 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3258 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3259 qparam.cw_min = 31;
3260 else
3261 qparam.cw_min = 15;
3262
f0706e82 3263 qparam.cw_max = 1023;
3330d7be 3264 qparam.txop = 0;
8318d78a 3265
f0706e82 3266 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
f0706e82
JB		 3267 local->ops->conf_tx(local_to_hw(local),
3268 i + IEEE80211_TX_QUEUE_DATA0,
3269 &qparam);
8318d78a 3270
f0706e82
JB		 3271 /* IBSS uses different parameters for Beacon sending */
3272 qparam.cw_min++;
3273 qparam.cw_min *= 2;
3274 qparam.cw_min--;
3275 local->ops->conf_tx(local_to_hw(local),
3276 IEEE80211_TX_QUEUE_BEACON, &qparam);
3277 }
3278
f0706e82
JB		 3279 ifsta = &sdata->u.sta;
3280
3281 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3282 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3283 memcpy(ifsta->ssid, ssid, len);
3284 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3285 ifsta->ssid_len = len;
3286
d6f2da5b
JS		 3287 if (len)
3288 ifsta->flags |= IEEE80211_STA_SSID_SET;
3289 else
3290 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3291 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3292 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3293 ifsta->ibss_join_req = jiffies;
3294 ifsta->state = IEEE80211_IBSS_SEARCH;
3295 return ieee80211_sta_find_ibss(dev, ifsta);
3296 }
3297 return 0;
3298}
3299
3300
3301int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3302{
3303 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3304 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3305 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3306 *len = ifsta->ssid_len;
3307 return 0;
3308}
3309
3310
3311int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3312{
3313 struct ieee80211_sub_if_data *sdata;
3314 struct ieee80211_if_sta *ifsta;
3315 int res;
3316
3317 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3318 ifsta = &sdata->u.sta;
3319
3320 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3321 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3322 res = ieee80211_if_config(dev);
3323 if (res) {
3324 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3325 "the low-level driver\n", dev->name);
3326 return res;
3327 }
3328 }
3329
d6f2da5b
JS		 3330 if (is_valid_ether_addr(bssid))
3331 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3332 else
d6f2da5b
JS		 3333 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3334
f0706e82
JB		 3335 return 0;
3336}
3337
3338
3339static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3340 struct ieee80211_sub_if_data *sdata,
3341 int powersave)
3342{
3343 struct sk_buff *skb;
3344 struct ieee80211_hdr *nullfunc;
3345 u16 fc;
3346
3347 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3348 if (!skb) {
3349 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3350 "frame\n", sdata->dev->name);
3351 return;
3352 }
3353 skb_reserve(skb, local->hw.extra_tx_headroom);
3354
3355 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3356 memset(nullfunc, 0, 24);
3357 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3358 IEEE80211_FCTL_TODS;
3359 if (powersave)
3360 fc |= IEEE80211_FCTL_PM;
3361 nullfunc->frame_control = cpu_to_le16(fc);
3362 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3363 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3364 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3365
3366 ieee80211_sta_tx(sdata->dev, skb, 0);
3367}
3368
3369
3370void ieee80211_scan_completed(struct ieee80211_hw *hw)
3371{
3372 struct ieee80211_local *local = hw_to_local(hw);
3373 struct net_device *dev = local->scan_dev;
3374 struct ieee80211_sub_if_data *sdata;
3375 union iwreq_data wrqu;
3376
3377 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3378 memset(&wrqu, 0, sizeof(wrqu));
3379 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3380
ece8eddd
ZY		 3381 if (local->sta_hw_scanning) {
3382 local->sta_hw_scanning = 0;
3383 goto done;
3384 }
3385
3386 local->sta_sw_scanning = 0;
f0706e82 3387 if (ieee80211_hw_config(local))
4b50e388 3388 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3389 "channel after scan\n", dev->name);
3390
4150c572
JB		 3391
3392 netif_tx_lock_bh(local->mdev);
3393 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3394 local->ops->configure_filter(local_to_hw(local),
3395 FIF_BCN_PRBRESP_PROMISC,
3396 &local->filter_flags,
3397 local->mdev->mc_count,
3398 local->mdev->mc_list);
3399
3400 netif_tx_unlock_bh(local->mdev);
f0706e82 3401
79010420
JB		 3402 rcu_read_lock();
3403 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3404
3405 /* No need to wake the master device. */
3406 if (sdata->dev == local->mdev)
3407 continue;
3408
51fb61e7 3409 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 3410 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 3411 ieee80211_send_nullfunc(local, sdata, 0);
3412 ieee80211_sta_timer((unsigned long)sdata);
3413 }
14042cbe 3414
f0706e82
JB		 3415 netif_wake_queue(sdata->dev);
3416 }
79010420 3417 rcu_read_unlock();
f0706e82 3418
ece8eddd 3419done:
f0706e82 3420 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3421 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3422 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3423 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3424 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3425 !ieee80211_sta_active_ibss(dev)))
3426 ieee80211_sta_find_ibss(dev, ifsta);
3427 }
3428}
3429EXPORT_SYMBOL(ieee80211_scan_completed);
3430
3431void ieee80211_sta_scan_work(struct work_struct *work)
3432{
3433 struct ieee80211_local *local =
3434 container_of(work, struct ieee80211_local, scan_work.work);
3435 struct net_device *dev = local->scan_dev;
3436 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3437 struct ieee80211_supported_band *sband;
f0706e82
JB		 3438 struct ieee80211_channel *chan;
3439 int skip;
3440 unsigned long next_delay = 0;
3441
ece8eddd 3442 if (!local->sta_sw_scanning)
f0706e82
JB		 3443 return;
3444
3445 switch (local->scan_state) {
3446 case SCAN_SET_CHANNEL:
69d464d5
JB		 3447 /*
3448 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3449 * after we successfully scanned the last channel of the last
3450 * band (and the last band is supported by the hw)
3451 */
8318d78a
JB		 3452 if (local->scan_band < IEEE80211_NUM_BANDS)
3453 sband = local->hw.wiphy->bands[local->scan_band];
3454 else
3455 sband = NULL;
3456
69d464d5
JB		 3457 /*
3458 * If we are at an unsupported band and have more bands
3459 * left to scan, advance to the next supported one.
3460 */
3461 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3462 local->scan_band++;
3463 sband = local->hw.wiphy->bands[local->scan_band];
3464 local->scan_channel_idx = 0;
3465 }
3466
69d464d5
JB		 3467 /* if no more bands/channels left, complete scan */
3468 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3469 ieee80211_scan_completed(local_to_hw(local));
3470 return;
3471 }
8318d78a
JB		 3472 skip = 0;
3473 chan = &sband->channels[local->scan_channel_idx];
3474
3475 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3476 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3477 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3478 skip = 1;
3479
3480 if (!skip) {
f0706e82
JB		 3481 local->scan_channel = chan;
3482 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3483 printk(KERN_DEBUG "%s: failed to set freq to "
3484 "%d MHz for scan\n", dev->name,
3485 chan->center_freq);
f0706e82
JB		 3486 skip = 1;
3487 }
3488 }
3489
69d464d5 3490 /* advance state machine to next channel/band */
f0706e82 3491 local->scan_channel_idx++;
8318d78a 3492 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3493 /*
3494 * scan_band may end up == IEEE80211_NUM_BANDS, but
3495 * we'll catch that case above and complete the scan
3496 * if that is the case.
3497 */
8318d78a
JB		 3498 local->scan_band++;
3499 local->scan_channel_idx = 0;
f0706e82
JB		 3500 }
3501
3502 if (skip)
3503 break;
3504
3505 next_delay = IEEE80211_PROBE_DELAY +
3506 usecs_to_jiffies(local->hw.channel_change_time);
3507 local->scan_state = SCAN_SEND_PROBE;
3508 break;
3509 case SCAN_SEND_PROBE:
8318d78a 3510 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3511 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3512
3513 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3514 break;
3515 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3516 local->scan_ssid_len);
3517 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3518 break;
3519 }
3520
ece8eddd 3521 if (local->sta_sw_scanning)
f0706e82
JB		 3522 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3523 next_delay);
3524}
3525
3526
3527static int ieee80211_sta_start_scan(struct net_device *dev,
3528 u8 *ssid, size_t ssid_len)
3529{
3530 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3531 struct ieee80211_sub_if_data *sdata;
3532
3533 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3534 return -EINVAL;
3535
3536 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3537 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3538 * BSSID: MACAddress
3539 * SSID
3540 * ScanType: ACTIVE, PASSIVE
3541 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3542 * a Probe frame during active scanning
3543 * ChannelList
3544 * MinChannelTime (>= ProbeDelay), in TU
3545 * MaxChannelTime: (>= MinChannelTime), in TU
3546 */
3547
3548 /* MLME-SCAN.confirm
3549 * BSSDescriptionSet
3550 * ResultCode: SUCCESS, INVALID_PARAMETERS
3551 */
3552
ece8eddd 3553 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3554 if (local->scan_dev == dev)
3555 return 0;
3556 return -EBUSY;
3557 }
3558
3559 if (local->ops->hw_scan) {
3560 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3561 ssid, ssid_len);
f0706e82 3562 if (!rc) {
ece8eddd 3563 local->sta_hw_scanning = 1;
f0706e82
JB		 3564 local->scan_dev = dev;
3565 }
3566 return rc;
3567 }
3568
ece8eddd 3569 local->sta_sw_scanning = 1;
f0706e82 3570
79010420
JB		 3571 rcu_read_lock();
3572 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3573
3574 /* Don't stop the master interface, otherwise we can't transmit
3575 * probes! */
3576 if (sdata->dev == local->mdev)
3577 continue;
3578
f0706e82 3579 netif_stop_queue(sdata->dev);
51fb61e7 3580 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3581 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3582 ieee80211_send_nullfunc(local, sdata, 1);
3583 }
79010420 3584 rcu_read_unlock();
f0706e82
JB		 3585
3586 if (ssid) {
3587 local->scan_ssid_len = ssid_len;
3588 memcpy(local->scan_ssid, ssid, ssid_len);
3589 } else
3590 local->scan_ssid_len = 0;
3591 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3592 local->scan_channel_idx = 0;
8318d78a 3593 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 3594 local->scan_dev = dev;
3595
4150c572
JB		 3596 netif_tx_lock_bh(local->mdev);
3597 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3598 local->ops->configure_filter(local_to_hw(local),
3599 FIF_BCN_PRBRESP_PROMISC,
3600 &local->filter_flags,
3601 local->mdev->mc_count,
3602 local->mdev->mc_list);
3603 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3604
3605 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3606 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3607 IEEE80211_CHANNEL_TIME);
3608
3609 return 0;
3610}
3611
3612
3613int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3614{
3615 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3616 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3617 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3618
51fb61e7 3619 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3620 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3621
ece8eddd 3622 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3623 if (local->scan_dev == dev)
3624 return 0;
3625 return -EBUSY;
3626 }
3627
a0af5f14
HS		 3628 ifsta->scan_ssid_len = ssid_len;
3629 if (ssid_len)
3630 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3631 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3632 queue_work(local->hw.workqueue, &ifsta->work);
3633 return 0;
3634}
3635
3636static char *
3637ieee80211_sta_scan_result(struct net_device *dev,
3638 struct ieee80211_sta_bss *bss,
3639 char *current_ev, char *end_buf)
3640{
3641 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3642 struct iw_event iwe;
3643
3644 if (time_after(jiffies,
3645 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3646 return current_ev;
3647
f0706e82
JB		 3648 memset(&iwe, 0, sizeof(iwe));
3649 iwe.cmd = SIOCGIWAP;
3650 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3651 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3652 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3653 IW_EV_ADDR_LEN);
3654
3655 memset(&iwe, 0, sizeof(iwe));
3656 iwe.cmd = SIOCGIWESSID;
3657 iwe.u.data.length = bss->ssid_len;
3658 iwe.u.data.flags = 1;
3659 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3660 bss->ssid);
3661
3662 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3663 memset(&iwe, 0, sizeof(iwe));
3664 iwe.cmd = SIOCGIWMODE;
3665 if (bss->capability & WLAN_CAPABILITY_ESS)
3666 iwe.u.mode = IW_MODE_MASTER;
3667 else
3668 iwe.u.mode = IW_MODE_ADHOC;
3669 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3670 IW_EV_UINT_LEN);
3671 }
3672
3673 memset(&iwe, 0, sizeof(iwe));
3674 iwe.cmd = SIOCGIWFREQ;
8318d78a
JB		 3675 iwe.u.freq.m = bss->freq;
3676 iwe.u.freq.e = 6;
f0706e82
JB		 3677 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3678 IW_EV_FREQ_LEN);
8318d78a
JB		 3679
3680 memset(&iwe, 0, sizeof(iwe));
3681 iwe.cmd = SIOCGIWFREQ;
3682 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3683 iwe.u.freq.e = 0;
f0706e82
JB		 3684 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3685 IW_EV_FREQ_LEN);
3686
3687 memset(&iwe, 0, sizeof(iwe));
3688 iwe.cmd = IWEVQUAL;
3689 iwe.u.qual.qual = bss->signal;
3690 iwe.u.qual.level = bss->rssi;
3691 iwe.u.qual.noise = bss->noise;
3692 iwe.u.qual.updated = local->wstats_flags;
3693 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3694 IW_EV_QUAL_LEN);
3695
3696 memset(&iwe, 0, sizeof(iwe));
3697 iwe.cmd = SIOCGIWENCODE;
3698 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3699 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3700 else
3701 iwe.u.data.flags = IW_ENCODE_DISABLED;
3702 iwe.u.data.length = 0;
3703 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3704
3705 if (bss && bss->wpa_ie) {
3706 memset(&iwe, 0, sizeof(iwe));
3707 iwe.cmd = IWEVGENIE;
3708 iwe.u.data.length = bss->wpa_ie_len;
3709 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3710 bss->wpa_ie);
3711 }
3712
3713 if (bss && bss->rsn_ie) {
3714 memset(&iwe, 0, sizeof(iwe));
3715 iwe.cmd = IWEVGENIE;
3716 iwe.u.data.length = bss->rsn_ie_len;
3717 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3718 bss->rsn_ie);
3719 }
3720
3721 if (bss && bss->supp_rates_len > 0) {
3722 /* display all supported rates in readable format */
3723 char *p = current_ev + IW_EV_LCP_LEN;
3724 int i;
3725
3726 memset(&iwe, 0, sizeof(iwe));
3727 iwe.cmd = SIOCGIWRATE;
3728 /* Those two flags are ignored... */
3729 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3730
3731 for (i = 0; i < bss->supp_rates_len; i++) {
3732 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3733 0x7f) * 500000);
3734 p = iwe_stream_add_value(current_ev, p,
3735 end_buf, &iwe, IW_EV_PARAM_LEN);
3736 }
3737 current_ev = p;
3738 }
3739
3740 if (bss) {
3741 char *buf;
3742 buf = kmalloc(30, GFP_ATOMIC);
3743 if (buf) {
3744 memset(&iwe, 0, sizeof(iwe));
3745 iwe.cmd = IWEVCUSTOM;
3746 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3747 iwe.u.data.length = strlen(buf);
3748 current_ev = iwe_stream_add_point(current_ev, end_buf,
3749 &iwe, buf);
3750 kfree(buf);
3751 }
3752 }
3753
f0706e82
JB		 3754 return current_ev;
3755}
3756
3757
3758int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3759{
3760 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3761 char *current_ev = buf;
3762 char *end_buf = buf + len;
3763 struct ieee80211_sta_bss *bss;
3764
3765 spin_lock_bh(&local->sta_bss_lock);
3766 list_for_each_entry(bss, &local->sta_bss_list, list) {
3767 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3768 spin_unlock_bh(&local->sta_bss_lock);
3769 return -E2BIG;
3770 }
3771 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3772 end_buf);
3773 }
3774 spin_unlock_bh(&local->sta_bss_lock);
3775 return current_ev - buf;
3776}
3777
3778
3779int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3780{
3781 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3782 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3783 kfree(ifsta->extra_ie);
3784 if (len == 0) {
3785 ifsta->extra_ie = NULL;
3786 ifsta->extra_ie_len = 0;
3787 return 0;
3788 }
3789 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3790 if (!ifsta->extra_ie) {
3791 ifsta->extra_ie_len = 0;
3792 return -ENOMEM;
3793 }
3794 memcpy(ifsta->extra_ie, ie, len);
3795 ifsta->extra_ie_len = len;
3796 return 0;
3797}
3798
3799
3800struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3801 struct sk_buff *skb, u8 *bssid,
3802 u8 *addr)
3803{
3804 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3805 struct sta_info *sta;
91fa558b 3806 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3807 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3808
3809 /* TODO: Could consider removing the least recently used entry and
3810 * allow new one to be added. */
3811 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3812 if (net_ratelimit()) {
3813 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3814 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3815 }
3816 return NULL;
3817 }
3818
0795af57 3819 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3820 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3821
3822 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3823 if (!sta)
3824 return NULL;
3825
238814fd
JB		 3826 sta->flags |= WLAN_STA_AUTHORIZED;
3827
8318d78a
JB		 3828 sta->supp_rates[local->hw.conf.channel->band] =
3829 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
f0706e82
JB		 3830
3831 rate_control_rate_init(sta, local);
3832
3833 return sta; /* caller will call sta_info_put() */
3834}
3835
3836
3837int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3838{
3839 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3840 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3841
3842 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3843 dev->name, reason);
3844
51fb61e7
JB		 3845 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3846 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 3847 return -EINVAL;
3848
3849 ieee80211_send_deauth(dev, ifsta, reason);
3850 ieee80211_set_disassoc(dev, ifsta, 1);
3851 return 0;
3852}
3853
3854
3855int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3856{
3857 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3858 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3859
3860 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3861 dev->name, reason);
3862
51fb61e7 3863 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3864 return -EINVAL;
3865
d6f2da5b 3866 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3867 return -1;
3868
3869 ieee80211_send_disassoc(dev, ifsta, reason);
3870 ieee80211_set_disassoc(dev, ifsta, 0);
3871 return 0;
3872}
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