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mac80211: Fix rate reporting regression
[deliverable/linux.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
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 *
cffdd30d
JL		 77ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
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{
230 int cw = 1;
231 while (ecw > 0) {
232 cw <<= 1;
233 ecw--;
234 }
235 return cw - 1;
236}
237
f0706e82
JB		 238static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241{
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(&params, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313}
314
315
5628221c
DD		 316static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
317{
5628221c
DD		 318 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
319 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
320 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 321 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 322 u8 changes = 0;
0795af57 323 DECLARE_MAC_BUF(mac);
5628221c 324
13262ffd 325 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
5628221c
DD		 326 if (net_ratelimit()) {
327 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 328 "%s)\n",
5628221c
DD		 329 dev->name,
330 use_protection ? "enabled" : "disabled",
0795af57 331 print_mac(mac, ifsta->bssid));
5628221c 332 }
13262ffd
JS		 333 if (use_protection)
334 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
335 else
336 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
d9430a32 337 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 338 }
7e9ed188 339
13262ffd 340 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
7e9ed188
DD		 341 if (net_ratelimit()) {
342 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 343 " (BSSID=%s)\n",
7e9ed188
DD		 344 dev->name,
345 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
346 "short" : "long",
0795af57 347 print_mac(mac, ifsta->bssid));
7e9ed188 348 }
13262ffd
JS		 349 if (preamble_mode)
350 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
351 else
352 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
d9430a32 353 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 354 }
d9430a32
DD		 355
356 if (changes)
357 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 358}
359
c7153508
RR		 360int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
361 struct ieee80211_ht_info *ht_info)
362{
363
364 if (ht_info == NULL)
365 return -EINVAL;
366
367 memset(ht_info, 0, sizeof(*ht_info));
368
369 if (ht_cap_ie) {
370 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
371
372 ht_info->ht_supported = 1;
373 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
374 ht_info->ampdu_factor =
375 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
376 ht_info->ampdu_density =
377 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
378 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
379 } else
380 ht_info->ht_supported = 0;
381
382 return 0;
383}
384
385int ieee80211_ht_addt_info_ie_to_ht_bss_info(
386 struct ieee80211_ht_addt_info *ht_add_info_ie,
387 struct ieee80211_ht_bss_info *bss_info)
388{
389 if (bss_info == NULL)
390 return -EINVAL;
391
392 memset(bss_info, 0, sizeof(*bss_info));
393
394 if (ht_add_info_ie) {
395 u16 op_mode;
396 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
397
398 bss_info->primary_channel = ht_add_info_ie->control_chan;
399 bss_info->bss_cap = ht_add_info_ie->ht_param;
400 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
401 }
402
403 return 0;
404}
5628221c 405
f0706e82
JB		 406static void ieee80211_sta_send_associnfo(struct net_device *dev,
407 struct ieee80211_if_sta *ifsta)
408{
409 char *buf;
410 size_t len;
411 int i;
412 union iwreq_data wrqu;
413
414 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
415 return;
416
417 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 418 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 419 if (!buf)
420 return;
421
422 len = sprintf(buf, "ASSOCINFO(");
423 if (ifsta->assocreq_ies) {
424 len += sprintf(buf + len, "ReqIEs=");
425 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
426 len += sprintf(buf + len, "%02x",
427 ifsta->assocreq_ies[i]);
428 }
429 }
430 if (ifsta->assocresp_ies) {
431 if (ifsta->assocreq_ies)
432 len += sprintf(buf + len, " ");
433 len += sprintf(buf + len, "RespIEs=");
434 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
435 len += sprintf(buf + len, "%02x",
436 ifsta->assocresp_ies[i]);
437 }
438 }
439 len += sprintf(buf + len, ")");
440
441 if (len > IW_CUSTOM_MAX) {
442 len = sprintf(buf, "ASSOCRESPIE=");
443 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
444 len += sprintf(buf + len, "%02x",
445 ifsta->assocresp_ies[i]);
446 }
447 }
448
449 memset(&wrqu, 0, sizeof(wrqu));
450 wrqu.data.length = len;
451 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
452
453 kfree(buf);
454}
455
456
457static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 458 struct ieee80211_if_sta *ifsta,
47f0c502 459 bool assoc)
f0706e82 460{
47f0c502 461 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 462 union iwreq_data wrqu;
463
d6f2da5b 464 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
f0706e82
JB		 465 return;
466
f0706e82
JB		 467 if (assoc) {
468 struct ieee80211_sub_if_data *sdata;
5628221c 469 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 470
471 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
472
f0706e82 473 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 474 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 475 return;
5628221c 476
65c107ab 477 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 478 local->hw.conf.channel,
479 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 480 if (bss) {
481 if (bss->has_erp_value)
482 ieee80211_handle_erp_ie(dev, bss->erp_value);
483 ieee80211_rx_bss_put(dev, bss);
484 }
485
f0706e82 486 netif_carrier_on(dev);
d6f2da5b 487 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 488 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
489 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
490 ieee80211_sta_send_associnfo(dev, ifsta);
491 } else {
d6f2da5b
JS		 492 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
493
f0706e82 494 netif_carrier_off(dev);
d9430a32 495 ieee80211_reset_erp_info(dev);
f0706e82
JB		 496 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
497 }
498 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
499 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
500 ifsta->last_probe = jiffies;
47f0c502 501 ieee80211_led_assoc(local, assoc);
f0706e82
JB		 502}
503
504static void ieee80211_set_disassoc(struct net_device *dev,
505 struct ieee80211_if_sta *ifsta, int deauth)
506{
507 if (deauth)
508 ifsta->auth_tries = 0;
509 ifsta->assoc_tries = 0;
510 ieee80211_set_associated(dev, ifsta, 0);
511}
512
513static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
514 int encrypt)
515{
516 struct ieee80211_sub_if_data *sdata;
517 struct ieee80211_tx_packet_data *pkt_data;
518
519 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
520 skb->dev = sdata->local->mdev;
521 skb_set_mac_header(skb, 0);
522 skb_set_network_header(skb, 0);
523 skb_set_transport_header(skb, 0);
524
525 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
526 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
527 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 528 if (!encrypt)
529 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 530
531 dev_queue_xmit(skb);
532}
533
534
535static void ieee80211_send_auth(struct net_device *dev,
536 struct ieee80211_if_sta *ifsta,
537 int transaction, u8 *extra, size_t extra_len,
538 int encrypt)
539{
540 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
541 struct sk_buff *skb;
542 struct ieee80211_mgmt *mgmt;
543
544 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
545 sizeof(*mgmt) + 6 + extra_len);
546 if (!skb) {
547 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
548 "frame\n", dev->name);
549 return;
550 }
551 skb_reserve(skb, local->hw.extra_tx_headroom);
552
553 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
554 memset(mgmt, 0, 24 + 6);
555 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
556 IEEE80211_STYPE_AUTH);
557 if (encrypt)
558 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
559 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
560 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
561 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
562 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
563 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
564 ifsta->auth_transaction = transaction + 1;
565 mgmt->u.auth.status_code = cpu_to_le16(0);
566 if (extra)
567 memcpy(skb_put(skb, extra_len), extra, extra_len);
568
569 ieee80211_sta_tx(dev, skb, encrypt);
570}
571
572
573static void ieee80211_authenticate(struct net_device *dev,
574 struct ieee80211_if_sta *ifsta)
575{
0795af57
JP		 576 DECLARE_MAC_BUF(mac);
577
f0706e82
JB		 578 ifsta->auth_tries++;
579 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 580 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 581 " timed out\n",
0795af57 582 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 583 ifsta->state = IEEE80211_DISABLED;
584 return;
585 }
586
587 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 588 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
589 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 590
591 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
592
593 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
594}
595
596
597static void ieee80211_send_assoc(struct net_device *dev,
598 struct ieee80211_if_sta *ifsta)
599{
600 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
601 struct ieee80211_hw_mode *mode;
602 struct sk_buff *skb;
603 struct ieee80211_mgmt *mgmt;
604 u8 *pos, *ies;
605 int i, len;
606 u16 capab;
607 struct ieee80211_sta_bss *bss;
608 int wmm = 0;
609
610 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
611 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
612 ifsta->ssid_len);
613 if (!skb) {
614 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
615 "frame\n", dev->name);
616 return;
617 }
618 skb_reserve(skb, local->hw.extra_tx_headroom);
619
620 mode = local->oper_hw_mode;
621 capab = ifsta->capab;
622 if (mode->mode == MODE_IEEE80211G) {
623 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
624 WLAN_CAPABILITY_SHORT_PREAMBLE;
625 }
cffdd30d
JL		 626 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
627 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 628 if (bss) {
629 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
630 capab |= WLAN_CAPABILITY_PRIVACY;
631 if (bss->wmm_ie) {
632 wmm = 1;
633 }
634 ieee80211_rx_bss_put(dev, bss);
635 }
636
637 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
638 memset(mgmt, 0, 24);
639 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
640 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
641 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
642
d6f2da5b 643 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 644 skb_put(skb, 10);
645 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
646 IEEE80211_STYPE_REASSOC_REQ);
647 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
648 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
649 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
650 ETH_ALEN);
651 } else {
652 skb_put(skb, 4);
653 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
654 IEEE80211_STYPE_ASSOC_REQ);
655 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
656 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
657 }
658
659 /* SSID */
660 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
661 *pos++ = WLAN_EID_SSID;
662 *pos++ = ifsta->ssid_len;
663 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
664
665 len = mode->num_rates;
666 if (len > 8)
667 len = 8;
668 pos = skb_put(skb, len + 2);
669 *pos++ = WLAN_EID_SUPP_RATES;
670 *pos++ = len;
671 for (i = 0; i < len; i++) {
672 int rate = mode->rates[i].rate;
f0706e82
JB		 673 *pos++ = (u8) (rate / 5);
674 }
675
676 if (mode->num_rates > len) {
677 pos = skb_put(skb, mode->num_rates - len + 2);
678 *pos++ = WLAN_EID_EXT_SUPP_RATES;
679 *pos++ = mode->num_rates - len;
680 for (i = len; i < mode->num_rates; i++) {
681 int rate = mode->rates[i].rate;
f0706e82
JB		 682 *pos++ = (u8) (rate / 5);
683 }
684 }
685
686 if (ifsta->extra_ie) {
687 pos = skb_put(skb, ifsta->extra_ie_len);
688 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
689 }
690
d6f2da5b 691 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 692 pos = skb_put(skb, 9);
693 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
694 *pos++ = 7; /* len */
695 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
696 *pos++ = 0x50;
697 *pos++ = 0xf2;
698 *pos++ = 2; /* WME */
699 *pos++ = 0; /* WME info */
700 *pos++ = 1; /* WME ver */
701 *pos++ = 0;
702 }
c7153508
RR		 703 /* wmm support is a must to HT */
704 if (wmm && mode->ht_info.ht_supported) {
705 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
706 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
707 *pos++ = WLAN_EID_HT_CAPABILITY;
708 *pos++ = sizeof(struct ieee80211_ht_cap);
709 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
710 memcpy(pos, &tmp, sizeof(u16));
711 pos += sizeof(u16);
712 *pos++ = (mode->ht_info.ampdu_factor |
713 (mode->ht_info.ampdu_density << 2));
714 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
715 }
f0706e82
JB		 716
717 kfree(ifsta->assocreq_ies);
718 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 719 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 720 if (ifsta->assocreq_ies)
721 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
722
723 ieee80211_sta_tx(dev, skb, 0);
724}
725
726
727static void ieee80211_send_deauth(struct net_device *dev,
728 struct ieee80211_if_sta *ifsta, u16 reason)
729{
730 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
731 struct sk_buff *skb;
732 struct ieee80211_mgmt *mgmt;
733
734 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
735 if (!skb) {
736 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
737 "frame\n", dev->name);
738 return;
739 }
740 skb_reserve(skb, local->hw.extra_tx_headroom);
741
742 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
743 memset(mgmt, 0, 24);
744 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
745 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
746 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
747 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
748 IEEE80211_STYPE_DEAUTH);
749 skb_put(skb, 2);
750 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
751
752 ieee80211_sta_tx(dev, skb, 0);
753}
754
755
756static void ieee80211_send_disassoc(struct net_device *dev,
757 struct ieee80211_if_sta *ifsta, u16 reason)
758{
759 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
760 struct sk_buff *skb;
761 struct ieee80211_mgmt *mgmt;
762
763 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
764 if (!skb) {
765 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
766 "frame\n", dev->name);
767 return;
768 }
769 skb_reserve(skb, local->hw.extra_tx_headroom);
770
771 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
772 memset(mgmt, 0, 24);
773 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
774 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
775 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
776 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
777 IEEE80211_STYPE_DISASSOC);
778 skb_put(skb, 2);
779 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
780
781 ieee80211_sta_tx(dev, skb, 0);
782}
783
784
785static int ieee80211_privacy_mismatch(struct net_device *dev,
786 struct ieee80211_if_sta *ifsta)
787{
65c107ab 788 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 789 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 790 int bss_privacy;
791 int wep_privacy;
792 int privacy_invoked;
f0706e82 793
5b98b1f7 794 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 795 return 0;
796
cffdd30d
JL		 797 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
798 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 799 if (!bss)
800 return 0;
801
5b98b1f7
JB		 802 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
803 wep_privacy = !!ieee80211_sta_wep_configured(dev);
804 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 805
806 ieee80211_rx_bss_put(dev, bss);
807
5b98b1f7
JB		 808 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
809 return 0;
810
811 return 1;
f0706e82
JB		 812}
813
814
815static void ieee80211_associate(struct net_device *dev,
816 struct ieee80211_if_sta *ifsta)
817{
0795af57
JP		 818 DECLARE_MAC_BUF(mac);
819
f0706e82
JB		 820 ifsta->assoc_tries++;
821 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 822 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 823 " timed out\n",
0795af57 824 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 825 ifsta->state = IEEE80211_DISABLED;
826 return;
827 }
828
829 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 830 printk(KERN_DEBUG "%s: associate with AP %s\n",
831 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 832 if (ieee80211_privacy_mismatch(dev, ifsta)) {
833 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
834 "mixed-cell disabled - abort association\n", dev->name);
835 ifsta->state = IEEE80211_DISABLED;
836 return;
837 }
838
839 ieee80211_send_assoc(dev, ifsta);
840
841 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
842}
843
844
845static void ieee80211_associated(struct net_device *dev,
846 struct ieee80211_if_sta *ifsta)
847{
848 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
849 struct sta_info *sta;
850 int disassoc;
0795af57 851 DECLARE_MAC_BUF(mac);
f0706e82
JB		 852
853 /* TODO: start monitoring current AP signal quality and number of
854 * missed beacons. Scan other channels every now and then and search
855 * for better APs. */
856 /* TODO: remove expired BSSes */
857
858 ifsta->state = IEEE80211_ASSOCIATED;
859
860 sta = sta_info_get(local, ifsta->bssid);
861 if (!sta) {
0795af57
JP		 862 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
863 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 864 disassoc = 1;
865 } else {
866 disassoc = 0;
867 if (time_after(jiffies,
868 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 869 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 870 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 871 "current AP %s - assume out of "
f0706e82 872 "range\n",
0795af57 873 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 874 disassoc = 1;
be8755e1 875 sta_info_free(sta);
d6f2da5b 876 } else
f0706e82
JB		 877 ieee80211_send_probe_req(dev, ifsta->bssid,
878 local->scan_ssid,
879 local->scan_ssid_len);
d6f2da5b 880 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 881 } else {
d6f2da5b 882 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 883 if (time_after(jiffies, ifsta->last_probe +
884 IEEE80211_PROBE_INTERVAL)) {
885 ifsta->last_probe = jiffies;
886 ieee80211_send_probe_req(dev, ifsta->bssid,
887 ifsta->ssid,
888 ifsta->ssid_len);
889 }
890 }
891 sta_info_put(sta);
892 }
893 if (disassoc) {
2d192d95
MW		 894 ifsta->state = IEEE80211_DISABLED;
895 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 896 } else {
897 mod_timer(&ifsta->timer, jiffies +
898 IEEE80211_MONITORING_INTERVAL);
899 }
900}
901
902
903static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
904 u8 *ssid, size_t ssid_len)
905{
906 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
907 struct ieee80211_hw_mode *mode;
908 struct sk_buff *skb;
909 struct ieee80211_mgmt *mgmt;
910 u8 *pos, *supp_rates, *esupp_rates = NULL;
911 int i;
912
913 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
914 if (!skb) {
915 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
916 "request\n", dev->name);
917 return;
918 }
919 skb_reserve(skb, local->hw.extra_tx_headroom);
920
921 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
922 memset(mgmt, 0, 24);
923 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
924 IEEE80211_STYPE_PROBE_REQ);
925 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
926 if (dst) {
927 memcpy(mgmt->da, dst, ETH_ALEN);
928 memcpy(mgmt->bssid, dst, ETH_ALEN);
929 } else {
930 memset(mgmt->da, 0xff, ETH_ALEN);
931 memset(mgmt->bssid, 0xff, ETH_ALEN);
932 }
933 pos = skb_put(skb, 2 + ssid_len);
934 *pos++ = WLAN_EID_SSID;
935 *pos++ = ssid_len;
936 memcpy(pos, ssid, ssid_len);
937
938 supp_rates = skb_put(skb, 2);
939 supp_rates[0] = WLAN_EID_SUPP_RATES;
940 supp_rates[1] = 0;
941 mode = local->oper_hw_mode;
942 for (i = 0; i < mode->num_rates; i++) {
943 struct ieee80211_rate *rate = &mode->rates[i];
944 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
945 continue;
946 if (esupp_rates) {
947 pos = skb_put(skb, 1);
948 esupp_rates[1]++;
949 } else if (supp_rates[1] == 8) {
950 esupp_rates = skb_put(skb, 3);
951 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
952 esupp_rates[1] = 1;
953 pos = &esupp_rates[2];
954 } else {
955 pos = skb_put(skb, 1);
956 supp_rates[1]++;
957 }
b708e610 958 *pos = rate->rate / 5;
f0706e82
JB		 959 }
960
961 ieee80211_sta_tx(dev, skb, 0);
962}
963
964
965static int ieee80211_sta_wep_configured(struct net_device *dev)
966{
967 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
968 if (!sdata || !sdata->default_key ||
8f20fc24 969 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 970 return 0;
971 return 1;
972}
973
974
975static void ieee80211_auth_completed(struct net_device *dev,
976 struct ieee80211_if_sta *ifsta)
977{
978 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 979 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 980 ieee80211_associate(dev, ifsta);
981}
982
983
984static void ieee80211_auth_challenge(struct net_device *dev,
985 struct ieee80211_if_sta *ifsta,
986 struct ieee80211_mgmt *mgmt,
987 size_t len)
988{
989 u8 *pos;
990 struct ieee802_11_elems elems;
991
992 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
993 pos = mgmt->u.auth.variable;
67a4cce4 994 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 995 if (!elems.challenge) {
996 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
997 "frame\n", dev->name);
998 return;
999 }
1000 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1001 elems.challenge_len + 2, 1);
1002}
1003
9f985b0e
RR		 1004static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1005 u8 dialog_token, u16 status, u16 policy,
1006 u16 buf_size, u16 timeout)
1007{
1008 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1009 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1010 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1011 struct sk_buff *skb;
1012 struct ieee80211_mgmt *mgmt;
1013 u16 capab;
1014
07db2183
RR		 1015 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1016 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1017 if (!skb) {
1018 printk(KERN_DEBUG "%s: failed to allocate buffer "
1019 "for addba resp frame\n", dev->name);
1020 return;
1021 }
1022
1023 skb_reserve(skb, local->hw.extra_tx_headroom);
1024 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1025 memset(mgmt, 0, 24);
1026 memcpy(mgmt->da, da, ETH_ALEN);
1027 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1028 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1029 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1030 else
1031 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1032 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1033 IEEE80211_STYPE_ACTION);
1034
1035 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1036 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1037 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1038 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1039
1040 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1041 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1042 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1043
1044 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1045 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1046 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1047
1048 ieee80211_sta_tx(dev, skb, 0);
1049
1050 return;
1051}
1052
1053static void ieee80211_sta_process_addba_request(struct net_device *dev,
1054 struct ieee80211_mgmt *mgmt,
1055 size_t len)
1056{
1057 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1058 struct ieee80211_hw *hw = &local->hw;
1059 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1060 struct sta_info *sta;
07db2183
RR		 1061 struct tid_ampdu_rx *tid_agg_rx;
1062 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1063 u8 dialog_token;
07db2183
RR		 1064 int ret = -EOPNOTSUPP;
1065 DECLARE_MAC_BUF(mac);
9f985b0e
RR		 1066
1067 sta = sta_info_get(local, mgmt->sa);
1068 if (!sta)
1069 return;
1070
1071 /* extract session parameters from addba request frame */
1072 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1073 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1074 start_seq_num =
1075 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1076
1077 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1078 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1079 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1080 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1081
9f985b0e
RR		 1082 status = WLAN_STATUS_REQUEST_DECLINED;
1083
07db2183
RR		 1084 /* sanity check for incoming parameters:
1085 * check if configuration can support the BA policy
1086 * and if buffer size does not exceeds max value */
1087 if (((ba_policy != 1)
1088 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1089 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1090 status = WLAN_STATUS_INVALID_QOS_PARAM;
1091#ifdef CONFIG_MAC80211_HT_DEBUG
1092 if (net_ratelimit())
1093 printk(KERN_DEBUG "Block Ack Req with bad params from "
1094 "%s on tid %u. policy %d, buffer size %d\n",
1095 print_mac(mac, mgmt->sa), tid, ba_policy,
1096 buf_size);
1097#endif /* CONFIG_MAC80211_HT_DEBUG */
1098 goto end_no_lock;
1099 }
1100 /* determine default buffer size */
1101 if (buf_size == 0) {
1102 struct ieee80211_hw_mode *mode = conf->mode;
1103 buf_size = IEEE80211_MIN_AMPDU_BUF;
1104 buf_size = buf_size << mode->ht_info.ampdu_factor;
1105 }
1106
1107 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1108
1109 /* examine state machine */
1110 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1111
1112 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1113#ifdef CONFIG_MAC80211_HT_DEBUG
1114 if (net_ratelimit())
1115 printk(KERN_DEBUG "unexpected Block Ack Req from "
1116 "%s on tid %u\n",
1117 print_mac(mac, mgmt->sa), tid);
1118#endif /* CONFIG_MAC80211_HT_DEBUG */
1119 goto end;
1120 }
1121
1122 /* prepare reordering buffer */
1123 tid_agg_rx->reorder_buf =
1124 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1125 if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) {
1126 printk(KERN_ERR "can not allocate reordering buffer "
1127 "to tid %d\n", tid);
1128 goto end;
1129 }
1130 memset(tid_agg_rx->reorder_buf, 0,
1131 buf_size * sizeof(struct sk_buf *));
1132
1133 if (local->ops->ampdu_action)
1134 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1135 sta->addr, tid, start_seq_num);
1136#ifdef CONFIG_MAC80211_HT_DEBUG
1137 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1138#endif /* CONFIG_MAC80211_HT_DEBUG */
1139
1140 if (ret) {
1141 kfree(tid_agg_rx->reorder_buf);
1142 goto end;
1143 }
1144
1145 /* change state and send addba resp */
1146 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1147 tid_agg_rx->dialog_token = dialog_token;
1148 tid_agg_rx->ssn = start_seq_num;
1149 tid_agg_rx->head_seq_num = start_seq_num;
1150 tid_agg_rx->buf_size = buf_size;
1151 tid_agg_rx->timeout = timeout;
1152 tid_agg_rx->stored_mpdu_num = 0;
1153 status = WLAN_STATUS_SUCCESS;
1154end:
1155 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1156
1157end_no_lock:
9f985b0e
RR		 1158 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1159 status, 1, buf_size, timeout);
1160 sta_info_put(sta);
1161}
f0706e82 1162
07db2183
RR		 1163void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1164 u16 initiator, u16 reason_code)
1165{
1166 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1167 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1168 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1169 struct sk_buff *skb;
1170 struct ieee80211_mgmt *mgmt;
1171 u16 params;
1172
1173 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1174 sizeof(mgmt->u.action.u.delba));
1175
1176 if (!skb) {
1177 printk(KERN_ERR "%s: failed to allocate buffer "
1178 "for delba frame\n", dev->name);
1179 return;
1180 }
1181
1182 skb_reserve(skb, local->hw.extra_tx_headroom);
1183 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1184 memset(mgmt, 0, 24);
1185 memcpy(mgmt->da, da, ETH_ALEN);
1186 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1187 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1188 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1189 else
1190 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1191 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1192 IEEE80211_STYPE_ACTION);
1193
1194 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1195
1196 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1197 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1198 params = (u16)(initiator << 11); /* bit 11 initiator */
1199 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1200
1201 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1202 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1203
1204 ieee80211_sta_tx(dev, skb, 0);
1205}
1206
1207void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1208 u16 initiator, u16 reason)
1209{
1210 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1211 struct ieee80211_hw *hw = &local->hw;
1212 struct sta_info *sta;
b580781e 1213 int ret, i;
07db2183
RR		 1214
1215 sta = sta_info_get(local, ra);
1216 if (!sta)
1217 return;
1218
1219 /* check if TID is in operational state */
1220 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1221 if (sta->ampdu_mlme.tid_rx[tid].state
1222 != HT_AGG_STATE_OPERATIONAL) {
1223 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1224 if (net_ratelimit())
1225 printk(KERN_DEBUG "rx BA session requested to stop on "
1226 "inactive tid %d\n", tid);
1227 sta_info_put(sta);
1228 return;
1229 }
1230 sta->ampdu_mlme.tid_rx[tid].state =
1231 HT_AGG_STATE_REQ_STOP_BA_MSK |
1232 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1233 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1234
1235 /* stop HW Rx aggregation. ampdu_action existence
1236 * already verified in session init so we add the BUG_ON */
1237 BUG_ON(!local->ops->ampdu_action);
1238
1239 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1240 ra, tid, EINVAL);
1241 if (ret)
1242 printk(KERN_DEBUG "HW problem - can not stop rx "
1243 "aggergation for tid %d\n", tid);
1244
1245 /* shutdown timer has not expired */
1246 if (initiator != WLAN_BACK_TIMER)
1247 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1248 session_timer);
1249
1250 /* check if this is a self generated aggregation halt */
1251 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1252 ieee80211_send_delba(dev, ra, tid, 0, reason);
1253
1254 /* free the reordering buffer */
b580781e
RR		 1255 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1256 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1257 /* release the reordered frames */
1258 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1259 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1260 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1261 }
1262 }
07db2183
RR		 1263 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1264
1265 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1266 sta_info_put(sta);
1267}
1268
688b88a4
RR		 1269static void ieee80211_sta_process_delba(struct net_device *dev,
1270 struct ieee80211_mgmt *mgmt, size_t len)
1271{
1272 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1273 struct sta_info *sta;
1274 u16 tid, params;
1275 u16 initiator;
1276 DECLARE_MAC_BUF(mac);
1277
1278 sta = sta_info_get(local, mgmt->sa);
1279 if (!sta)
1280 return;
1281
1282 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1283 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1284 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1285
1286#ifdef CONFIG_MAC80211_HT_DEBUG
1287 if (net_ratelimit())
1288 printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
1289 print_mac(mac, mgmt->sa), tid,
1290 mgmt->u.action.u.delba.reason_code);
1291#endif /* CONFIG_MAC80211_HT_DEBUG */
1292
1293 if (initiator == WLAN_BACK_INITIATOR)
1294 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1295 WLAN_BACK_INITIATOR, 0);
1296 sta_info_put(sta);
1297}
1298
07db2183
RR		 1299/*
1300 * After receiving Block Ack Request (BAR) we activated a
1301 * timer after each frame arrives from the originator.
1302 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1303 */
1304void sta_rx_agg_session_timer_expired(unsigned long data)
1305{
1306 /* not an elegant detour, but there is no choice as the timer passes
1307 * only one argument, and verious sta_info are needed here, so init
1308 * flow in sta_info_add gives the TID as data, while the timer_to_id
1309 * array gives the sta through container_of */
1310 u8 *ptid = (u8 *)data;
1311 u8 *timer_to_id = ptid - *ptid;
1312 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1313 timer_to_tid[0]);
1314
1315 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1316 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1317 WLAN_BACK_TIMER,
1318 WLAN_REASON_QSTA_TIMEOUT);
1319}
1320
1321
f0706e82
JB		 1322static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1323 struct ieee80211_if_sta *ifsta,
1324 struct ieee80211_mgmt *mgmt,
1325 size_t len)
1326{
1327 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1328 u16 auth_alg, auth_transaction, status_code;
0795af57 1329 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1330
1331 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1332 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1333 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1334 "%s, but not in authenticate state - ignored\n",
1335 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1336 return;
1337 }
1338
1339 if (len < 24 + 6) {
1340 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1341 "received from %s - ignored\n",
1342 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1343 return;
1344 }
1345
51fb61e7 1346 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1347 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1348 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1349 "unknown AP (SA=%s BSSID=%s) - "
1350 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1351 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1352 return;
1353 }
1354
51fb61e7 1355 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1356 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1357 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1358 "unknown BSSID (SA=%s BSSID=%s) - "
1359 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1360 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1361 return;
1362 }
1363
1364 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1365 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1366 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1367
0795af57 1368 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1369 "transaction=%d status=%d)\n",
0795af57 1370 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1371 auth_transaction, status_code);
1372
51fb61e7 1373 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1374 /* IEEE 802.11 standard does not require authentication in IBSS
1375 * networks and most implementations do not seem to use it.
1376 * However, try to reply to authentication attempts if someone
1377 * has actually implemented this.
1378 * TODO: Could implement shared key authentication. */
1379 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1380 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1381 "frame (alg=%d transaction=%d)\n",
1382 dev->name, auth_alg, auth_transaction);
1383 return;
1384 }
1385 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1386 }
1387
1388 if (auth_alg != ifsta->auth_alg ||
1389 auth_transaction != ifsta->auth_transaction) {
1390 printk(KERN_DEBUG "%s: unexpected authentication frame "
1391 "(alg=%d transaction=%d)\n",
1392 dev->name, auth_alg, auth_transaction);
1393 return;
1394 }
1395
1396 if (status_code != WLAN_STATUS_SUCCESS) {
1397 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1398 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1399 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1400 u8 algs[3];
1401 const int num_algs = ARRAY_SIZE(algs);
1402 int i, pos;
1403 algs[0] = algs[1] = algs[2] = 0xff;
1404 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1405 algs[0] = WLAN_AUTH_OPEN;
1406 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1407 algs[1] = WLAN_AUTH_SHARED_KEY;
1408 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1409 algs[2] = WLAN_AUTH_LEAP;
1410 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1411 pos = 0;
1412 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1413 pos = 1;
1414 else
1415 pos = 2;
1416 for (i = 0; i < num_algs; i++) {
1417 pos++;
1418 if (pos >= num_algs)
1419 pos = 0;
1420 if (algs[pos] == ifsta->auth_alg ||
1421 algs[pos] == 0xff)
1422 continue;
1423 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1424 !ieee80211_sta_wep_configured(dev))
1425 continue;
1426 ifsta->auth_alg = algs[pos];
1427 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1428 "next try\n",
1429 dev->name, ifsta->auth_alg);
1430 break;
1431 }
1432 }
1433 return;
1434 }
1435
1436 switch (ifsta->auth_alg) {
1437 case WLAN_AUTH_OPEN:
1438 case WLAN_AUTH_LEAP:
1439 ieee80211_auth_completed(dev, ifsta);
1440 break;
1441 case WLAN_AUTH_SHARED_KEY:
1442 if (ifsta->auth_transaction == 4)
1443 ieee80211_auth_completed(dev, ifsta);
1444 else
1445 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1446 break;
1447 }
1448}
1449
1450
1451static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1452 struct ieee80211_if_sta *ifsta,
1453 struct ieee80211_mgmt *mgmt,
1454 size_t len)
1455{
1456 u16 reason_code;
0795af57 1457 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1458
1459 if (len < 24 + 2) {
1460 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1461 "received from %s - ignored\n",
1462 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1463 return;
1464 }
1465
1466 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1467 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1468 "unknown AP (SA=%s BSSID=%s) - "
1469 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1470 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1471 return;
1472 }
1473
1474 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1475
0795af57 1476 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1477 " (reason=%d)\n",
0795af57 1478 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1479
d6f2da5b 1480 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1481 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1482 }
1483
1484 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1485 ifsta->state == IEEE80211_ASSOCIATE ||
1486 ifsta->state == IEEE80211_ASSOCIATED) {
1487 ifsta->state = IEEE80211_AUTHENTICATE;
1488 mod_timer(&ifsta->timer, jiffies +
1489 IEEE80211_RETRY_AUTH_INTERVAL);
1490 }
1491
1492 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1493 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1494}
1495
1496
1497static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1498 struct ieee80211_if_sta *ifsta,
1499 struct ieee80211_mgmt *mgmt,
1500 size_t len)
1501{
1502 u16 reason_code;
0795af57 1503 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1504
1505 if (len < 24 + 2) {
1506 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1507 "received from %s - ignored\n",
1508 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1509 return;
1510 }
1511
1512 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1513 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1514 "unknown AP (SA=%s BSSID=%s) - "
1515 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1516 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1517 return;
1518 }
1519
1520 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1521
0795af57 1522 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1523 " (reason=%d)\n",
0795af57 1524 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1525
d6f2da5b 1526 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1527 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1528
1529 if (ifsta->state == IEEE80211_ASSOCIATED) {
1530 ifsta->state = IEEE80211_ASSOCIATE;
1531 mod_timer(&ifsta->timer, jiffies +
1532 IEEE80211_RETRY_AUTH_INTERVAL);
1533 }
1534
1535 ieee80211_set_disassoc(dev, ifsta, 0);
1536}
1537
1538
1539static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1540 struct ieee80211_if_sta *ifsta,
1541 struct ieee80211_mgmt *mgmt,
1542 size_t len,
1543 int reassoc)
1544{
1545 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1546 struct ieee80211_hw_mode *mode;
1547 struct sta_info *sta;
1548 u32 rates;
1549 u16 capab_info, status_code, aid;
1550 struct ieee802_11_elems elems;
1551 u8 *pos;
1552 int i, j;
0795af57 1553 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1554
1555 /* AssocResp and ReassocResp have identical structure, so process both
1556 * of them in this function. */
1557
1558 if (ifsta->state != IEEE80211_ASSOCIATE) {
1559 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1560 "%s, but not in associate state - ignored\n",
1561 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1562 return;
1563 }
1564
1565 if (len < 24 + 6) {
1566 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1567 "received from %s - ignored\n",
1568 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1569 return;
1570 }
1571
1572 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1573 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1574 "unknown AP (SA=%s BSSID=%s) - "
1575 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1576 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1577 return;
1578 }
1579
1580 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1581 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1582 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1583
0795af57 1584 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1585 "status=%d aid=%d)\n",
0795af57 1586 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1587 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1588
1589 if (status_code != WLAN_STATUS_SUCCESS) {
1590 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1591 dev->name, status_code);
8a69aa93
DD		 1592 /* if this was a reassociation, ensure we try a "full"
1593 * association next time. This works around some broken APs
1594 * which do not correctly reject reassociation requests. */
d6f2da5b 1595 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1596 return;
1597 }
1598
1dd84aa2
JB		 1599 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1600 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1601 "set\n", dev->name, aid);
1602 aid &= ~(BIT(15) | BIT(14));
1603
f0706e82 1604 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1605 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1606
1607 if (!elems.supp_rates) {
1608 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1609 dev->name);
1610 return;
1611 }
1612
1613 printk(KERN_DEBUG "%s: associated\n", dev->name);
1614 ifsta->aid = aid;
1615 ifsta->ap_capab = capab_info;
1616
1617 kfree(ifsta->assocresp_ies);
1618 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1619 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1620 if (ifsta->assocresp_ies)
1621 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1622
1623 ieee80211_set_associated(dev, ifsta, 1);
1624
1625 /* Add STA entry for the AP */
1626 sta = sta_info_get(local, ifsta->bssid);
1627 if (!sta) {
1628 struct ieee80211_sta_bss *bss;
0ec0b7ac 1629 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1630 if (!sta) {
1631 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1632 " AP\n", dev->name);
1633 return;
1634 }
65c107ab 1635 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1636 local->hw.conf.channel,
1637 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1638 if (bss) {
1639 sta->last_rssi = bss->rssi;
1640 sta->last_signal = bss->signal;
1641 sta->last_noise = bss->noise;
1642 ieee80211_rx_bss_put(dev, bss);
1643 }
1644 }
1645
1646 sta->dev = dev;
c9ee23df 1647 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1648
1649 rates = 0;
1650 mode = local->oper_hw_mode;
1651 for (i = 0; i < elems.supp_rates_len; i++) {
1652 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1653 for (j = 0; j < mode->num_rates; j++)
1654 if (mode->rates[j].rate == rate)
1655 rates |= BIT(j);
1656 }
1657 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1658 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1659 for (j = 0; j < mode->num_rates; j++)
1660 if (mode->rates[j].rate == rate)
1661 rates |= BIT(j);
1662 }
1663 sta->supp_rates = rates;
1664
d3c990fb
RR		 1665 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1666 local->ops->conf_ht) {
1667 struct ieee80211_ht_bss_info bss_info;
1668
1669 ieee80211_ht_cap_ie_to_ht_info(
1670 (struct ieee80211_ht_cap *)
1671 elems.ht_cap_elem, &sta->ht_info);
1672 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1673 (struct ieee80211_ht_addt_info *)
1674 elems.ht_info_elem, &bss_info);
1675 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1676 }
1677
f0706e82
JB		 1678 rate_control_rate_init(sta, local);
1679
d6f2da5b 1680 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1681 sta->flags |= WLAN_STA_WME;
1682 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1683 elems.wmm_param_len);
1684 }
1685
1686
1687 sta_info_put(sta);
1688
1689 ieee80211_associated(dev, ifsta);
1690}
1691
1692
1693/* Caller must hold local->sta_bss_lock */
1694static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1695 struct ieee80211_sta_bss *bss)
1696{
1697 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1698 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1699 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1700}
1701
1702
1703/* Caller must hold local->sta_bss_lock */
1704static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1705 struct ieee80211_sta_bss *bss)
1706{
1707 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1708 struct ieee80211_sta_bss *b, *prev = NULL;
1709 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1710 while (b) {
1711 if (b == bss) {
1712 if (!prev)
1713 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1714 bss->hnext;
1715 else
1716 prev->hnext = bss->hnext;
1717 break;
1718 }
1719 prev = b;
1720 b = b->hnext;
1721 }
1722}
1723
1724
1725static struct ieee80211_sta_bss *
cffdd30d
JL		 1726ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1727 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1728{
1729 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1730 struct ieee80211_sta_bss *bss;
1731
dd00cc48 1732 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1733 if (!bss)
1734 return NULL;
f0706e82
JB		 1735 atomic_inc(&bss->users);
1736 atomic_inc(&bss->users);
1737 memcpy(bss->bssid, bssid, ETH_ALEN);
65c107ab 1738 bss->channel = channel;
cffdd30d
JL		 1739 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1740 memcpy(bss->ssid, ssid, ssid_len);
1741 bss->ssid_len = ssid_len;
1742 }
f0706e82
JB		 1743
1744 spin_lock_bh(&local->sta_bss_lock);
1745 /* TODO: order by RSSI? */
1746 list_add_tail(&bss->list, &local->sta_bss_list);
1747 __ieee80211_rx_bss_hash_add(dev, bss);
1748 spin_unlock_bh(&local->sta_bss_lock);
1749 return bss;
1750}
1751
1752
1753static struct ieee80211_sta_bss *
cffdd30d
JL		 1754ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1755 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1756{
1757 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1758 struct ieee80211_sta_bss *bss;
1759
1760 spin_lock_bh(&local->sta_bss_lock);
1761 bss = local->sta_bss_hash[STA_HASH(bssid)];
1762 while (bss) {
cffdd30d
JL		 1763 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1764 bss->channel == channel &&
1765 bss->ssid_len == ssid_len &&
1766 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 1767 atomic_inc(&bss->users);
1768 break;
1769 }
1770 bss = bss->hnext;
1771 }
1772 spin_unlock_bh(&local->sta_bss_lock);
1773 return bss;
1774}
1775
1776
1777static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1778{
1779 kfree(bss->wpa_ie);
1780 kfree(bss->rsn_ie);
1781 kfree(bss->wmm_ie);
c7153508 1782 kfree(bss->ht_ie);
f0706e82
JB		 1783 kfree(bss);
1784}
1785
1786
1787static void ieee80211_rx_bss_put(struct net_device *dev,
1788 struct ieee80211_sta_bss *bss)
1789{
1790 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1791 if (!atomic_dec_and_test(&bss->users))
1792 return;
1793
1794 spin_lock_bh(&local->sta_bss_lock);
1795 __ieee80211_rx_bss_hash_del(dev, bss);
1796 list_del(&bss->list);
1797 spin_unlock_bh(&local->sta_bss_lock);
1798 ieee80211_rx_bss_free(bss);
1799}
1800
1801
1802void ieee80211_rx_bss_list_init(struct net_device *dev)
1803{
1804 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1805 spin_lock_init(&local->sta_bss_lock);
1806 INIT_LIST_HEAD(&local->sta_bss_list);
1807}
1808
1809
1810void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1811{
1812 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1813 struct ieee80211_sta_bss *bss, *tmp;
1814
1815 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1816 ieee80211_rx_bss_put(dev, bss);
1817}
1818
1819
1820static void ieee80211_rx_bss_info(struct net_device *dev,
1821 struct ieee80211_mgmt *mgmt,
1822 size_t len,
1823 struct ieee80211_rx_status *rx_status,
1824 int beacon)
1825{
1826 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1827 struct ieee802_11_elems elems;
1828 size_t baselen;
67a4cce4 1829 int channel, clen;
f0706e82
JB		 1830 struct ieee80211_sta_bss *bss;
1831 struct sta_info *sta;
1832 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1833 u64 timestamp;
0795af57
JP		 1834 DECLARE_MAC_BUF(mac);
1835 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 1836
1837 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1838 return; /* ignore ProbeResp to foreign address */
1839
1840#if 0
0795af57 1841 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 1842 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 1843 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 1844#endif
1845
1846 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1847 if (baselen > len)
1848 return;
1849
1850 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1851
51fb61e7 1852 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
f0706e82
JB		 1853 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1854#ifdef CONFIG_MAC80211_IBSS_DEBUG
1855 static unsigned long last_tsf_debug = 0;
1856 u64 tsf;
1857 if (local->ops->get_tsf)
1858 tsf = local->ops->get_tsf(local_to_hw(local));
1859 else
1860 tsf = -1LLU;
1861 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 1862 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1863 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 1864 "@%lu\n",
0795af57 1865 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 1866 (unsigned long long)tsf,
1867 (unsigned long long)timestamp,
1868 (unsigned long long)(tsf - timestamp),
1869 jiffies);
1870 last_tsf_debug = jiffies;
1871 }
1872#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1873 }
1874
67a4cce4 1875 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 1876
51fb61e7 1877 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 1878 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1879 (sta = sta_info_get(local, mgmt->sa))) {
1880 struct ieee80211_hw_mode *mode;
1881 struct ieee80211_rate *rates;
1882 size_t num_rates;
1883 u32 supp_rates, prev_rates;
1884 int i, j;
1885
ece8eddd 1886 mode = local->sta_sw_scanning ?
f0706e82 1887 local->scan_hw_mode : local->oper_hw_mode;
ece8eddd
ZY		 1888
1889 if (local->sta_hw_scanning) {
1890 /* search for the correct mode matches the beacon */
1891 list_for_each_entry(mode, &local->modes_list, list)
1892 if (mode->mode == rx_status->phymode)
1893 break;
1894
1895 if (mode == NULL)
1896 mode = local->oper_hw_mode;
1897 }
f0706e82
JB		 1898 rates = mode->rates;
1899 num_rates = mode->num_rates;
1900
1901 supp_rates = 0;
1902 for (i = 0; i < elems.supp_rates_len +
1903 elems.ext_supp_rates_len; i++) {
1904 u8 rate = 0;
1905 int own_rate;
1906 if (i < elems.supp_rates_len)
1907 rate = elems.supp_rates[i];
1908 else if (elems.ext_supp_rates)
1909 rate = elems.ext_supp_rates
1910 [i - elems.supp_rates_len];
1911 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 1912 for (j = 0; j < num_rates; j++)
1913 if (rates[j].rate == own_rate)
1914 supp_rates |= BIT(j);
1915 }
1916
1917 prev_rates = sta->supp_rates;
1918 sta->supp_rates &= supp_rates;
1919 if (sta->supp_rates == 0) {
1920 /* No matching rates - this should not really happen.
1921 * Make sure that at least one rate is marked
1922 * supported to avoid issues with TX rate ctrl. */
1923 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1924 }
1925 if (sta->supp_rates != prev_rates) {
1926 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 1927 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 1928 "0x%x)\n",
0795af57 1929 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 1930 supp_rates, sta->supp_rates);
1931 }
1932 sta_info_put(sta);
1933 }
1934
1935 if (!elems.ssid)
1936 return;
1937
1938 if (elems.ds_params && elems.ds_params_len == 1)
1939 channel = elems.ds_params[0];
1940 else
1941 channel = rx_status->channel;
1942
cffdd30d
JL		 1943 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1944 elems.ssid, elems.ssid_len);
f0706e82 1945 if (!bss) {
cffdd30d
JL		 1946 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1947 elems.ssid, elems.ssid_len);
f0706e82
JB		 1948 if (!bss)
1949 return;
1950 } else {
1951#if 0
1952 /* TODO: order by RSSI? */
1953 spin_lock_bh(&local->sta_bss_lock);
1954 list_move_tail(&bss->list, &local->sta_bss_list);
1955 spin_unlock_bh(&local->sta_bss_lock);
1956#endif
1957 }
1958
1959 if (bss->probe_resp && beacon) {
1960 /* Do not allow beacon to override data from Probe Response. */
1961 ieee80211_rx_bss_put(dev, bss);
1962 return;
1963 }
1964
5628221c
DD		 1965 /* save the ERP value so that it is available at association time */
1966 if (elems.erp_info && elems.erp_info_len >= 1) {
1967 bss->erp_value = elems.erp_info[0];
1968 bss->has_erp_value = 1;
1969 }
1970
f0706e82
JB		 1971 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1972 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 1973
1974 bss->supp_rates_len = 0;
1975 if (elems.supp_rates) {
1976 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1977 if (clen > elems.supp_rates_len)
1978 clen = elems.supp_rates_len;
1979 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1980 clen);
1981 bss->supp_rates_len += clen;
1982 }
1983 if (elems.ext_supp_rates) {
1984 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1985 if (clen > elems.ext_supp_rates_len)
1986 clen = elems.ext_supp_rates_len;
1987 memcpy(&bss->supp_rates[bss->supp_rates_len],
1988 elems.ext_supp_rates, clen);
1989 bss->supp_rates_len += clen;
1990 }
1991
1992 if (elems.wpa &&
1993 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1994 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1995 kfree(bss->wpa_ie);
1996 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1997 if (bss->wpa_ie) {
1998 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1999 bss->wpa_ie_len = elems.wpa_len + 2;
2000 } else
2001 bss->wpa_ie_len = 0;
2002 } else if (!elems.wpa && bss->wpa_ie) {
2003 kfree(bss->wpa_ie);
2004 bss->wpa_ie = NULL;
2005 bss->wpa_ie_len = 0;
2006 }
2007
2008 if (elems.rsn &&
2009 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2010 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2011 kfree(bss->rsn_ie);
2012 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2013 if (bss->rsn_ie) {
2014 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2015 bss->rsn_ie_len = elems.rsn_len + 2;
2016 } else
2017 bss->rsn_ie_len = 0;
2018 } else if (!elems.rsn && bss->rsn_ie) {
2019 kfree(bss->rsn_ie);
2020 bss->rsn_ie = NULL;
2021 bss->rsn_ie_len = 0;
2022 }
2023
2024 if (elems.wmm_param &&
2025 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2026 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2027 kfree(bss->wmm_ie);
2028 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2029 if (bss->wmm_ie) {
2030 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2031 elems.wmm_param_len + 2);
2032 bss->wmm_ie_len = elems.wmm_param_len + 2;
2033 } else
2034 bss->wmm_ie_len = 0;
2035 } else if (!elems.wmm_param && bss->wmm_ie) {
2036 kfree(bss->wmm_ie);
2037 bss->wmm_ie = NULL;
2038 bss->wmm_ie_len = 0;
2039 }
c7153508
RR		 2040 if (elems.ht_cap_elem &&
2041 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2042 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2043 kfree(bss->ht_ie);
2044 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2045 if (bss->ht_ie) {
2046 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2047 elems.ht_cap_elem_len + 2);
2048 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2049 } else
2050 bss->ht_ie_len = 0;
2051 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2052 kfree(bss->ht_ie);
2053 bss->ht_ie = NULL;
2054 bss->ht_ie_len = 0;
2055 }
f0706e82
JB		 2056
2057 bss->hw_mode = rx_status->phymode;
f0706e82
JB		 2058 bss->freq = rx_status->freq;
2059 if (channel != rx_status->channel &&
2060 (bss->hw_mode == MODE_IEEE80211G ||
2061 bss->hw_mode == MODE_IEEE80211B) &&
2062 channel >= 1 && channel <= 14) {
2063 static const int freq_list[] = {
2064 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2065 2447, 2452, 2457, 2462, 2467, 2472, 2484
2066 };
2067 /* IEEE 802.11g/b mode can receive packets from neighboring
2068 * channels, so map the channel into frequency. */
2069 bss->freq = freq_list[channel - 1];
2070 }
2071 bss->timestamp = timestamp;
2072 bss->last_update = jiffies;
2073 bss->rssi = rx_status->ssi;
2074 bss->signal = rx_status->signal;
2075 bss->noise = rx_status->noise;
2076 if (!beacon)
2077 bss->probe_resp++;
2078 ieee80211_rx_bss_put(dev, bss);
2079}
2080
2081
2082static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2083 struct ieee80211_mgmt *mgmt,
2084 size_t len,
2085 struct ieee80211_rx_status *rx_status)
2086{
2087 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2088}
2089
2090
2091static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2092 struct ieee80211_mgmt *mgmt,
2093 size_t len,
2094 struct ieee80211_rx_status *rx_status)
2095{
f0706e82
JB		 2096 struct ieee80211_sub_if_data *sdata;
2097 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2098 size_t baselen;
2099 struct ieee802_11_elems elems;
d3c990fb
RR		 2100 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2101 struct ieee80211_conf *conf = &local->hw.conf;
f0706e82
JB		 2102
2103 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2104
2105 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2106 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2107 return;
2108 ifsta = &sdata->u.sta;
2109
d6f2da5b 2110 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2111 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2112 return;
2113
2114 /* Process beacon from the current BSS */
2115 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2116 if (baselen > len)
2117 return;
2118
67a4cce4 2119 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2120
5628221c
DD		 2121 if (elems.erp_info && elems.erp_info_len >= 1)
2122 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82 2123
d3c990fb
RR		 2124 if (elems.ht_cap_elem && elems.ht_info_elem &&
2125 elems.wmm_param && local->ops->conf_ht &&
2126 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2127 struct ieee80211_ht_bss_info bss_info;
2128
2129 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2130 (struct ieee80211_ht_addt_info *)
2131 elems.ht_info_elem, &bss_info);
2132 /* check if AP changed bss inforamation */
2133 if ((conf->ht_bss_conf.primary_channel !=
2134 bss_info.primary_channel) ||
2135 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2136 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2137 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2138 &bss_info);
2139 }
2140
d6f2da5b 2141 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2142 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2143 elems.wmm_param_len);
2144 }
2145}
2146
2147
2148static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2149 struct ieee80211_if_sta *ifsta,
2150 struct ieee80211_mgmt *mgmt,
2151 size_t len,
2152 struct ieee80211_rx_status *rx_status)
2153{
2154 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2156 int tx_last_beacon;
2157 struct sk_buff *skb;
2158 struct ieee80211_mgmt *resp;
2159 u8 *pos, *end;
0795af57
JP		 2160 DECLARE_MAC_BUF(mac);
2161#ifdef CONFIG_MAC80211_IBSS_DEBUG
2162 DECLARE_MAC_BUF(mac2);
2163 DECLARE_MAC_BUF(mac3);
2164#endif
f0706e82 2165
51fb61e7 2166 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2167 ifsta->state != IEEE80211_IBSS_JOINED ||
2168 len < 24 + 2 || !ifsta->probe_resp)
2169 return;
2170
2171 if (local->ops->tx_last_beacon)
2172 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2173 else
2174 tx_last_beacon = 1;
2175
2176#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2177 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2178 "%s (tx_last_beacon=%d)\n",
2179 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2180 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2181#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2182
2183 if (!tx_last_beacon)
2184 return;
2185
2186 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2187 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2188 return;
2189
2190 end = ((u8 *) mgmt) + len;
2191 pos = mgmt->u.probe_req.variable;
2192 if (pos[0] != WLAN_EID_SSID ||
2193 pos + 2 + pos[1] > end) {
2194 if (net_ratelimit()) {
2195 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2196 "from %s\n",
2197 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2198 }
2199 return;
2200 }
2201 if (pos[1] != 0 &&
2202 (pos[1] != ifsta->ssid_len ||
2203 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2204 /* Ignore ProbeReq for foreign SSID */
2205 return;
2206 }
2207
2208 /* Reply with ProbeResp */
0ec0b7ac 2209 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2210 if (!skb)
2211 return;
2212
2213 resp = (struct ieee80211_mgmt *) skb->data;
2214 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2215#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2216 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2217 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2218#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2219 ieee80211_sta_tx(dev, skb, 0);
2220}
2221
4e20cb29
JB		 2222static void ieee80211_rx_mgmt_action(struct net_device *dev,
2223 struct ieee80211_if_sta *ifsta,
2224 struct ieee80211_mgmt *mgmt,
2225 size_t len)
9f985b0e
RR		 2226{
2227 if (len < IEEE80211_MIN_ACTION_SIZE)
2228 return;
2229
2230 switch (mgmt->u.action.category) {
2231 case WLAN_CATEGORY_BACK:
2232 switch (mgmt->u.action.u.addba_req.action_code) {
2233 case WLAN_ACTION_ADDBA_REQ:
2234 if (len < (IEEE80211_MIN_ACTION_SIZE +
2235 sizeof(mgmt->u.action.u.addba_req)))
2236 break;
2237 ieee80211_sta_process_addba_request(dev, mgmt, len);
2238 break;
688b88a4
RR		 2239 case WLAN_ACTION_DELBA:
2240 if (len < (IEEE80211_MIN_ACTION_SIZE +
2241 sizeof(mgmt->u.action.u.delba)))
2242 break;
2243 ieee80211_sta_process_delba(dev, mgmt, len);
2244 break;
9f985b0e
RR		 2245 default:
2246 if (net_ratelimit())
688b88a4 2247 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2248 dev->name);
2249 break;
2250 }
2251 break;
2252 default:
2253 break;
2254 }
2255}
f0706e82
JB		 2256
2257void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2258 struct ieee80211_rx_status *rx_status)
2259{
2260 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2261 struct ieee80211_sub_if_data *sdata;
2262 struct ieee80211_if_sta *ifsta;
2263 struct ieee80211_mgmt *mgmt;
2264 u16 fc;
2265
2266 if (skb->len < 24)
2267 goto fail;
2268
2269 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2270 ifsta = &sdata->u.sta;
2271
2272 mgmt = (struct ieee80211_mgmt *) skb->data;
2273 fc = le16_to_cpu(mgmt->frame_control);
2274
2275 switch (fc & IEEE80211_FCTL_STYPE) {
2276 case IEEE80211_STYPE_PROBE_REQ:
2277 case IEEE80211_STYPE_PROBE_RESP:
2278 case IEEE80211_STYPE_BEACON:
2279 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2280 case IEEE80211_STYPE_AUTH:
2281 case IEEE80211_STYPE_ASSOC_RESP:
2282 case IEEE80211_STYPE_REASSOC_RESP:
2283 case IEEE80211_STYPE_DEAUTH:
2284 case IEEE80211_STYPE_DISASSOC:
9f985b0e 2285 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2286 skb_queue_tail(&ifsta->skb_queue, skb);
2287 queue_work(local->hw.workqueue, &ifsta->work);
2288 return;
2289 default:
2290 printk(KERN_DEBUG "%s: received unknown management frame - "
2291 "stype=%d\n", dev->name,
2292 (fc & IEEE80211_FCTL_STYPE) >> 4);
2293 break;
2294 }
2295
2296 fail:
2297 kfree_skb(skb);
2298}
2299
2300
2301static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2302 struct sk_buff *skb)
2303{
2304 struct ieee80211_rx_status *rx_status;
2305 struct ieee80211_sub_if_data *sdata;
2306 struct ieee80211_if_sta *ifsta;
2307 struct ieee80211_mgmt *mgmt;
2308 u16 fc;
2309
2310 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2311 ifsta = &sdata->u.sta;
2312
2313 rx_status = (struct ieee80211_rx_status *) skb->cb;
2314 mgmt = (struct ieee80211_mgmt *) skb->data;
2315 fc = le16_to_cpu(mgmt->frame_control);
2316
2317 switch (fc & IEEE80211_FCTL_STYPE) {
2318 case IEEE80211_STYPE_PROBE_REQ:
2319 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2320 rx_status);
2321 break;
2322 case IEEE80211_STYPE_PROBE_RESP:
2323 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2324 break;
2325 case IEEE80211_STYPE_BEACON:
2326 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2327 break;
2328 case IEEE80211_STYPE_AUTH:
2329 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2330 break;
2331 case IEEE80211_STYPE_ASSOC_RESP:
2332 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
2333 break;
2334 case IEEE80211_STYPE_REASSOC_RESP:
2335 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
2336 break;
2337 case IEEE80211_STYPE_DEAUTH:
2338 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2339 break;
2340 case IEEE80211_STYPE_DISASSOC:
2341 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2342 break;
9f985b0e
RR		 2343 case IEEE80211_STYPE_ACTION:
2344 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2345 break;
f0706e82
JB		 2346 }
2347
2348 kfree_skb(skb);
2349}
2350
2351
ece8eddd
ZY		 2352ieee80211_txrx_result
2353ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2354 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2355{
2356 struct ieee80211_mgmt *mgmt;
2357 u16 fc;
2358
ece8eddd
ZY		 2359 if (skb->len < 2)
2360 return TXRX_DROP;
f0706e82
JB		 2361
2362 mgmt = (struct ieee80211_mgmt *) skb->data;
2363 fc = le16_to_cpu(mgmt->frame_control);
2364
ece8eddd
ZY		 2365 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2366 return TXRX_CONTINUE;
2367
2368 if (skb->len < 24)
2369 return TXRX_DROP;
2370
f0706e82
JB		 2371 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2372 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2373 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2374 skb->len, rx_status);
ece8eddd
ZY		 2375 dev_kfree_skb(skb);
2376 return TXRX_QUEUED;
f0706e82
JB		 2377 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2378 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2379 rx_status);
ece8eddd
ZY		 2380 dev_kfree_skb(skb);
2381 return TXRX_QUEUED;
f0706e82
JB		 2382 }
2383 }
ece8eddd 2384 return TXRX_CONTINUE;
f0706e82
JB		 2385}
2386
2387
2388static int ieee80211_sta_active_ibss(struct net_device *dev)
2389{
2390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2391 int active = 0;
2392 struct sta_info *sta;
2393
be8755e1 2394 read_lock_bh(&local->sta_lock);
f0706e82
JB		 2395 list_for_each_entry(sta, &local->sta_list, list) {
2396 if (sta->dev == dev &&
2397 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2398 jiffies)) {
2399 active++;
2400 break;
2401 }
2402 }
be8755e1 2403 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 2404
2405 return active;
2406}
2407
2408
2409static void ieee80211_sta_expire(struct net_device *dev)
2410{
2411 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2412 struct sta_info *sta, *tmp;
be8755e1 2413 LIST_HEAD(tmp_list);
0795af57 2414 DECLARE_MAC_BUF(mac);
f0706e82 2415
be8755e1 2416 write_lock_bh(&local->sta_lock);
f0706e82
JB		 2417 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2418 if (time_after(jiffies, sta->last_rx +
2419 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 2420 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2421 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 2422 __sta_info_get(sta);
2423 sta_info_remove(sta);
2424 list_add(&sta->list, &tmp_list);
f0706e82 2425 }
be8755e1
MW		 2426 write_unlock_bh(&local->sta_lock);
2427
2428 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2429 sta_info_free(sta);
2430 sta_info_put(sta);
2431 }
f0706e82
JB		 2432}
2433
2434
2435static void ieee80211_sta_merge_ibss(struct net_device *dev,
2436 struct ieee80211_if_sta *ifsta)
2437{
2438 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2439
2440 ieee80211_sta_expire(dev);
2441 if (ieee80211_sta_active_ibss(dev))
2442 return;
2443
2444 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2445 "IBSS networks with same SSID (merge)\n", dev->name);
2446 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2447}
2448
2449
2450void ieee80211_sta_timer(unsigned long data)
2451{
2452 struct ieee80211_sub_if_data *sdata =
2453 (struct ieee80211_sub_if_data *) data;
2454 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2455 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2456
2457 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2458 queue_work(local->hw.workqueue, &ifsta->work);
2459}
2460
2461
2462void ieee80211_sta_work(struct work_struct *work)
2463{
2464 struct ieee80211_sub_if_data *sdata =
2465 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2466 struct net_device *dev = sdata->dev;
2467 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2468 struct ieee80211_if_sta *ifsta;
2469 struct sk_buff *skb;
2470
2471 if (!netif_running(dev))
2472 return;
2473
ece8eddd 2474 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 2475 return;
2476
51fb61e7
JB		 2477 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2478 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 2479 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 2480 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 2481 return;
2482 }
2483 ifsta = &sdata->u.sta;
2484
2485 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2486 ieee80211_sta_rx_queued_mgmt(dev, skb);
2487
2488 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2489 ifsta->state != IEEE80211_ASSOCIATE &&
2490 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 2491 if (ifsta->scan_ssid_len)
2492 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2493 else
2494 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 2495 return;
2496 }
2497
2498 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2499 if (ieee80211_sta_config_auth(dev, ifsta))
2500 return;
2501 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2502 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2503 return;
2504
2505 switch (ifsta->state) {
2506 case IEEE80211_DISABLED:
2507 break;
2508 case IEEE80211_AUTHENTICATE:
2509 ieee80211_authenticate(dev, ifsta);
2510 break;
2511 case IEEE80211_ASSOCIATE:
2512 ieee80211_associate(dev, ifsta);
2513 break;
2514 case IEEE80211_ASSOCIATED:
2515 ieee80211_associated(dev, ifsta);
2516 break;
2517 case IEEE80211_IBSS_SEARCH:
2518 ieee80211_sta_find_ibss(dev, ifsta);
2519 break;
2520 case IEEE80211_IBSS_JOINED:
2521 ieee80211_sta_merge_ibss(dev, ifsta);
2522 break;
2523 default:
2524 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2525 ifsta->state);
2526 break;
2527 }
2528
2529 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2530 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2531 "mixed-cell disabled - disassociate\n", dev->name);
2532
2533 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2534 ieee80211_set_disassoc(dev, ifsta, 0);
2535 }
2536}
2537
2538
2539static void ieee80211_sta_reset_auth(struct net_device *dev,
2540 struct ieee80211_if_sta *ifsta)
2541{
2542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2543
2544 if (local->ops->reset_tsf) {
2545 /* Reset own TSF to allow time synchronization work. */
2546 local->ops->reset_tsf(local_to_hw(local));
2547 }
2548
2549 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2550
2551
2552 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2553 ifsta->auth_alg = WLAN_AUTH_OPEN;
2554 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2555 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2556 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2557 ifsta->auth_alg = WLAN_AUTH_LEAP;
2558 else
2559 ifsta->auth_alg = WLAN_AUTH_OPEN;
2560 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2561 ifsta->auth_alg);
2562 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2563 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2564 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2565 netif_carrier_off(dev);
2566}
2567
2568
2569void ieee80211_sta_req_auth(struct net_device *dev,
2570 struct ieee80211_if_sta *ifsta)
2571{
2572 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2574
51fb61e7 2575 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2576 return;
2577
d6f2da5b
JS		 2578 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2579 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2580 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2581 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2582 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2583 queue_work(local->hw.workqueue, &ifsta->work);
2584 }
2585}
2586
2587static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2588 const char *ssid, int ssid_len)
2589{
2590 int tmp, hidden_ssid;
2591
48225709
MW		 2592 if (ssid_len == ifsta->ssid_len &&
2593 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2594 return 1;
2595
d6f2da5b 2596 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2597 return 0;
2598
2599 hidden_ssid = 1;
2600 tmp = ssid_len;
2601 while (tmp--) {
2602 if (ssid[tmp] != '\0') {
2603 hidden_ssid = 0;
2604 break;
2605 }
2606 }
2607
2608 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2609 return 1;
2610
2611 if (ssid_len == 1 && ssid[0] == ' ')
2612 return 1;
2613
2614 return 0;
2615}
2616
2617static int ieee80211_sta_config_auth(struct net_device *dev,
2618 struct ieee80211_if_sta *ifsta)
2619{
2620 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2621 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2622 struct ieee80211_sta_bss *bss, *selected = NULL;
2623 int top_rssi = 0, freq;
2624
d6f2da5b
JS		 2625 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2626 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2627 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2628 ieee80211_sta_reset_auth(dev, ifsta);
2629 return 0;
2630 }
2631
2632 spin_lock_bh(&local->sta_bss_lock);
2633 freq = local->oper_channel->freq;
2634 list_for_each_entry(bss, &local->sta_bss_list, list) {
2635 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2636 continue;
2637
2638 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2639 !!sdata->default_key)
2640 continue;
2641
d6f2da5b
JS		 2642 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2643 bss->freq != freq)
f0706e82
JB		 2644 continue;
2645
d6f2da5b 2646 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2647 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2648 continue;
2649
d6f2da5b 2650 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2651 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2652 continue;
2653
2654 if (!selected || top_rssi < bss->rssi) {
2655 selected = bss;
2656 top_rssi = bss->rssi;
2657 }
2658 }
2659 if (selected)
2660 atomic_inc(&selected->users);
2661 spin_unlock_bh(&local->sta_bss_lock);
2662
2663 if (selected) {
2664 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2665 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2666 ieee80211_sta_set_ssid(dev, selected->ssid,
2667 selected->ssid_len);
2668 ieee80211_sta_set_bssid(dev, selected->bssid);
2669 ieee80211_rx_bss_put(dev, selected);
2670 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2671 ieee80211_sta_reset_auth(dev, ifsta);
2672 return 0;
2673 } else {
2674 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2675 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2676 ieee80211_sta_start_scan(dev, NULL, 0);
2677 else
2678 ieee80211_sta_start_scan(dev, ifsta->ssid,
2679 ifsta->ssid_len);
f0706e82
JB		 2680 ifsta->state = IEEE80211_AUTHENTICATE;
2681 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2682 } else
2683 ifsta->state = IEEE80211_DISABLED;
2684 }
f0706e82
JB		 2685 return -1;
2686}
2687
2688static int ieee80211_sta_join_ibss(struct net_device *dev,
2689 struct ieee80211_if_sta *ifsta,
2690 struct ieee80211_sta_bss *bss)
2691{
2692 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2693 int res, rates, i, j;
2694 struct sk_buff *skb;
2695 struct ieee80211_mgmt *mgmt;
2696 struct ieee80211_tx_control control;
f0706e82 2697 struct ieee80211_hw_mode *mode;
1abbe498 2698 struct rate_selection ratesel;
f0706e82
JB		 2699 u8 *pos;
2700 struct ieee80211_sub_if_data *sdata;
2701
2702 /* Remove possible STA entries from other IBSS networks. */
2703 sta_info_flush(local, NULL);
2704
2705 if (local->ops->reset_tsf) {
2706 /* Reset own TSF to allow time synchronization work. */
2707 local->ops->reset_tsf(local_to_hw(local));
2708 }
2709 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2710 res = ieee80211_if_config(dev);
2711 if (res)
2712 return res;
2713
2714 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2715
2716 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2717 sdata->drop_unencrypted = bss->capability &
2718 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2719
2720 res = ieee80211_set_channel(local, -1, bss->freq);
2721
2722 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2723 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2724 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2725 local->hw.conf.freq);
2726 return -1;
2727 }
2728
2729 /* Set beacon template based on scan results */
2730 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2731 do {
2732 if (!skb)
2733 break;
2734
2735 skb_reserve(skb, local->hw.extra_tx_headroom);
2736
2737 mgmt = (struct ieee80211_mgmt *)
2738 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2739 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2740 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2741 IEEE80211_STYPE_BEACON);
2742 memset(mgmt->da, 0xff, ETH_ALEN);
2743 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2744 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2745 mgmt->u.beacon.beacon_int =
2746 cpu_to_le16(local->hw.conf.beacon_int);
2747 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2748
2749 pos = skb_put(skb, 2 + ifsta->ssid_len);
2750 *pos++ = WLAN_EID_SSID;
2751 *pos++ = ifsta->ssid_len;
2752 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2753
2754 rates = bss->supp_rates_len;
2755 if (rates > 8)
2756 rates = 8;
2757 pos = skb_put(skb, 2 + rates);
2758 *pos++ = WLAN_EID_SUPP_RATES;
2759 *pos++ = rates;
2760 memcpy(pos, bss->supp_rates, rates);
2761
2762 pos = skb_put(skb, 2 + 1);
2763 *pos++ = WLAN_EID_DS_PARAMS;
2764 *pos++ = 1;
2765 *pos++ = bss->channel;
2766
2767 pos = skb_put(skb, 2 + 2);
2768 *pos++ = WLAN_EID_IBSS_PARAMS;
2769 *pos++ = 2;
2770 /* FIX: set ATIM window based on scan results */
2771 *pos++ = 0;
2772 *pos++ = 0;
2773
2774 if (bss->supp_rates_len > 8) {
2775 rates = bss->supp_rates_len - 8;
2776 pos = skb_put(skb, 2 + rates);
2777 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2778 *pos++ = rates;
2779 memcpy(pos, &bss->supp_rates[8], rates);
2780 }
2781
2782 memset(&control, 0, sizeof(control));
1abbe498
MN		 2783 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2784 if (!ratesel.rate) {
f0706e82
JB		 2785 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2786 "for IBSS beacon\n", dev->name);
2787 break;
2788 }
13262ffd
JS		 2789 control.tx_rate =
2790 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
1abbe498
MN		 2791 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2792 ratesel.rate->val2 : ratesel.rate->val;
f0706e82
JB		 2793 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2794 control.power_level = local->hw.conf.power_level;
2795 control.flags |= IEEE80211_TXCTL_NO_ACK;
2796 control.retry_limit = 1;
2797
2798 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2799 if (ifsta->probe_resp) {
2800 mgmt = (struct ieee80211_mgmt *)
2801 ifsta->probe_resp->data;
2802 mgmt->frame_control =
2803 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2804 IEEE80211_STYPE_PROBE_RESP);
2805 } else {
2806 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2807 "template for IBSS\n", dev->name);
2808 }
2809
2810 if (local->ops->beacon_update &&
2811 local->ops->beacon_update(local_to_hw(local),
2812 skb, &control) == 0) {
2813 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2814 "template based on scan results\n", dev->name);
2815 skb = NULL;
2816 }
2817
2818 rates = 0;
2819 mode = local->oper_hw_mode;
2820 for (i = 0; i < bss->supp_rates_len; i++) {
2821 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 2822 for (j = 0; j < mode->num_rates; j++)
2823 if (mode->rates[j].rate == bitrate)
2824 rates |= BIT(j);
2825 }
2826 ifsta->supp_rates_bits = rates;
2827 } while (0);
2828
2829 if (skb) {
2830 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2831 "template\n", dev->name);
2832 dev_kfree_skb(skb);
2833 }
2834
2835 ifsta->state = IEEE80211_IBSS_JOINED;
2836 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2837
2838 ieee80211_rx_bss_put(dev, bss);
2839
2840 return res;
2841}
2842
2843
2844static int ieee80211_sta_create_ibss(struct net_device *dev,
2845 struct ieee80211_if_sta *ifsta)
2846{
2847 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2848 struct ieee80211_sta_bss *bss;
cffdd30d 2849 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 2850 struct ieee80211_hw_mode *mode;
2851 u8 bssid[ETH_ALEN], *pos;
2852 int i;
0795af57 2853 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2854
2855#if 0
2856 /* Easier testing, use fixed BSSID. */
2857 memset(bssid, 0xfe, ETH_ALEN);
2858#else
2859 /* Generate random, not broadcast, locally administered BSSID. Mix in
2860 * own MAC address to make sure that devices that do not have proper
2861 * random number generator get different BSSID. */
2862 get_random_bytes(bssid, ETH_ALEN);
2863 for (i = 0; i < ETH_ALEN; i++)
2864 bssid[i] ^= dev->dev_addr[i];
2865 bssid[0] &= ~0x01;
2866 bssid[0] |= 0x02;
2867#endif
2868
0795af57
JP		 2869 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2870 dev->name, print_mac(mac, bssid));
f0706e82 2871
cffdd30d
JL		 2872 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2873 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2874 if (!bss)
2875 return -ENOMEM;
2876
f0706e82
JB		 2877 mode = local->oper_hw_mode;
2878
2879 if (local->hw.conf.beacon_int == 0)
2880 local->hw.conf.beacon_int = 100;
2881 bss->beacon_int = local->hw.conf.beacon_int;
2882 bss->hw_mode = local->hw.conf.phymode;
f0706e82
JB		 2883 bss->freq = local->hw.conf.freq;
2884 bss->last_update = jiffies;
2885 bss->capability = WLAN_CAPABILITY_IBSS;
2886 if (sdata->default_key) {
2887 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2888 } else
2889 sdata->drop_unencrypted = 0;
2890 bss->supp_rates_len = mode->num_rates;
2891 pos = bss->supp_rates;
2892 for (i = 0; i < mode->num_rates; i++) {
2893 int rate = mode->rates[i].rate;
f0706e82
JB		 2894 *pos++ = (u8) (rate / 5);
2895 }
2896
2897 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2898}
2899
2900
2901static int ieee80211_sta_find_ibss(struct net_device *dev,
2902 struct ieee80211_if_sta *ifsta)
2903{
2904 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2905 struct ieee80211_sta_bss *bss;
2906 int found = 0;
2907 u8 bssid[ETH_ALEN];
2908 int active_ibss;
0795af57
JP		 2909 DECLARE_MAC_BUF(mac);
2910 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2911
2912 if (ifsta->ssid_len == 0)
2913 return -EINVAL;
2914
2915 active_ibss = ieee80211_sta_active_ibss(dev);
2916#ifdef CONFIG_MAC80211_IBSS_DEBUG
2917 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2918 dev->name, active_ibss);
2919#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2920 spin_lock_bh(&local->sta_bss_lock);
2921 list_for_each_entry(bss, &local->sta_bss_list, list) {
2922 if (ifsta->ssid_len != bss->ssid_len ||
2923 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2924 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2925 continue;
2926#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2927 printk(KERN_DEBUG " bssid=%s found\n",
2928 print_mac(mac, bss->bssid));
f0706e82
JB		 2929#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2930 memcpy(bssid, bss->bssid, ETH_ALEN);
2931 found = 1;
2932 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2933 break;
2934 }
2935 spin_unlock_bh(&local->sta_bss_lock);
2936
2937#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2938 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2939 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 2940#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2941 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
cffdd30d
JL		 2942 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2943 ifsta->ssid, ifsta->ssid_len))) {
0795af57 2944 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2945 " based on configured SSID\n",
0795af57 2946 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2947 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2948 }
2949#ifdef CONFIG_MAC80211_IBSS_DEBUG
2950 printk(KERN_DEBUG " did not try to join ibss\n");
2951#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2952
2953 /* Selected IBSS not found in current scan results - try to scan */
2954 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2955 !ieee80211_sta_active_ibss(dev)) {
2956 mod_timer(&ifsta->timer, jiffies +
2957 IEEE80211_IBSS_MERGE_INTERVAL);
2958 } else if (time_after(jiffies, local->last_scan_completed +
2959 IEEE80211_SCAN_INTERVAL)) {
2960 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2961 "join\n", dev->name);
2962 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2963 ifsta->ssid_len);
2964 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2965 int interval = IEEE80211_SCAN_INTERVAL;
2966
2967 if (time_after(jiffies, ifsta->ibss_join_req +
2968 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2969 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 2970 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2971 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 2972 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 2973 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2974 " configured channel %d (%d MHz)\n",
2975 dev->name, local->hw.conf.channel,
2976 local->hw.conf.freq);
2977 }
2978
2979 /* No IBSS found - decrease scan interval and continue
2980 * scanning. */
2981 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2982 }
2983
2984 ifsta->state = IEEE80211_IBSS_SEARCH;
2985 mod_timer(&ifsta->timer, jiffies + interval);
2986 return 0;
2987 }
2988
2989 return 0;
2990}
2991
2992
2993int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2994{
2995 struct ieee80211_sub_if_data *sdata;
2996 struct ieee80211_if_sta *ifsta;
2997 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2998
2999 if (len > IEEE80211_MAX_SSID_LEN)
3000 return -EINVAL;
3001
3002 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3003 * not defined. */
3004 if (local->ops->conf_tx) {
3005 struct ieee80211_tx_queue_params qparam;
3006 int i;
3007
3008 memset(&qparam, 0, sizeof(qparam));
3009 /* TODO: are these ok defaults for all hw_modes? */
3010 qparam.aifs = 2;
3011 qparam.cw_min =
3012 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3013 qparam.cw_max = 1023;
3014 qparam.burst_time = 0;
3015 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3016 {
3017 local->ops->conf_tx(local_to_hw(local),
3018 i + IEEE80211_TX_QUEUE_DATA0,
3019 &qparam);
3020 }
3021 /* IBSS uses different parameters for Beacon sending */
3022 qparam.cw_min++;
3023 qparam.cw_min *= 2;
3024 qparam.cw_min--;
3025 local->ops->conf_tx(local_to_hw(local),
3026 IEEE80211_TX_QUEUE_BEACON, &qparam);
3027 }
3028
3029 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3030 ifsta = &sdata->u.sta;
3031
3032 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3033 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3034 memcpy(ifsta->ssid, ssid, len);
3035 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3036 ifsta->ssid_len = len;
3037
d6f2da5b
JS		 3038 if (len)
3039 ifsta->flags |= IEEE80211_STA_SSID_SET;
3040 else
3041 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3042 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3043 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3044 ifsta->ibss_join_req = jiffies;
3045 ifsta->state = IEEE80211_IBSS_SEARCH;
3046 return ieee80211_sta_find_ibss(dev, ifsta);
3047 }
3048 return 0;
3049}
3050
3051
3052int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3053{
3054 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3055 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3056 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3057 *len = ifsta->ssid_len;
3058 return 0;
3059}
3060
3061
3062int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3063{
3064 struct ieee80211_sub_if_data *sdata;
3065 struct ieee80211_if_sta *ifsta;
3066 int res;
3067
3068 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3069 ifsta = &sdata->u.sta;
3070
3071 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3072 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3073 res = ieee80211_if_config(dev);
3074 if (res) {
3075 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3076 "the low-level driver\n", dev->name);
3077 return res;
3078 }
3079 }
3080
d6f2da5b
JS		 3081 if (is_valid_ether_addr(bssid))
3082 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3083 else
d6f2da5b
JS		 3084 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3085
f0706e82
JB		 3086 return 0;
3087}
3088
3089
3090static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3091 struct ieee80211_sub_if_data *sdata,
3092 int powersave)
3093{
3094 struct sk_buff *skb;
3095 struct ieee80211_hdr *nullfunc;
3096 u16 fc;
3097
3098 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3099 if (!skb) {
3100 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3101 "frame\n", sdata->dev->name);
3102 return;
3103 }
3104 skb_reserve(skb, local->hw.extra_tx_headroom);
3105
3106 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3107 memset(nullfunc, 0, 24);
3108 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3109 IEEE80211_FCTL_TODS;
3110 if (powersave)
3111 fc |= IEEE80211_FCTL_PM;
3112 nullfunc->frame_control = cpu_to_le16(fc);
3113 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3114 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3115 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3116
3117 ieee80211_sta_tx(sdata->dev, skb, 0);
3118}
3119
3120
3121void ieee80211_scan_completed(struct ieee80211_hw *hw)
3122{
3123 struct ieee80211_local *local = hw_to_local(hw);
3124 struct net_device *dev = local->scan_dev;
3125 struct ieee80211_sub_if_data *sdata;
3126 union iwreq_data wrqu;
3127
3128 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3129 memset(&wrqu, 0, sizeof(wrqu));
3130 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3131
ece8eddd
ZY		 3132 if (local->sta_hw_scanning) {
3133 local->sta_hw_scanning = 0;
3134 goto done;
3135 }
3136
3137 local->sta_sw_scanning = 0;
f0706e82 3138 if (ieee80211_hw_config(local))
4b50e388 3139 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3140 "channel after scan\n", dev->name);
3141
4150c572
JB		 3142
3143 netif_tx_lock_bh(local->mdev);
3144 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3145 local->ops->configure_filter(local_to_hw(local),
3146 FIF_BCN_PRBRESP_PROMISC,
3147 &local->filter_flags,
3148 local->mdev->mc_count,
3149 local->mdev->mc_list);
3150
3151 netif_tx_unlock_bh(local->mdev);
f0706e82 3152
79010420
JB		 3153 rcu_read_lock();
3154 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3155
3156 /* No need to wake the master device. */
3157 if (sdata->dev == local->mdev)
3158 continue;
3159
51fb61e7 3160 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 3161 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 3162 ieee80211_send_nullfunc(local, sdata, 0);
3163 ieee80211_sta_timer((unsigned long)sdata);
3164 }
14042cbe 3165
f0706e82
JB		 3166 netif_wake_queue(sdata->dev);
3167 }
79010420 3168 rcu_read_unlock();
f0706e82 3169
ece8eddd 3170done:
f0706e82 3171 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3172 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3173 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3174 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3175 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3176 !ieee80211_sta_active_ibss(dev)))
3177 ieee80211_sta_find_ibss(dev, ifsta);
3178 }
3179}
3180EXPORT_SYMBOL(ieee80211_scan_completed);
3181
3182void ieee80211_sta_scan_work(struct work_struct *work)
3183{
3184 struct ieee80211_local *local =
3185 container_of(work, struct ieee80211_local, scan_work.work);
3186 struct net_device *dev = local->scan_dev;
3187 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3188 struct ieee80211_hw_mode *mode;
3189 struct ieee80211_channel *chan;
3190 int skip;
3191 unsigned long next_delay = 0;
3192
ece8eddd 3193 if (!local->sta_sw_scanning)
f0706e82
JB		 3194 return;
3195
3196 switch (local->scan_state) {
3197 case SCAN_SET_CHANNEL:
3198 mode = local->scan_hw_mode;
3199 if (local->scan_hw_mode->list.next == &local->modes_list &&
3200 local->scan_channel_idx >= mode->num_channels) {
3201 ieee80211_scan_completed(local_to_hw(local));
3202 return;
3203 }
3204 skip = !(local->enabled_modes & (1 << mode->mode));
3205 chan = &mode->channels[local->scan_channel_idx];
3206 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
51fb61e7 3207 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 3208 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3209 (local->hw_modes & local->enabled_modes &
3210 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3211 skip = 1;
3212
3213 if (!skip) {
3214#if 0
3215 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3216 dev->name, chan->chan, chan->freq);
3217#endif
3218
3219 local->scan_channel = chan;
3220 if (ieee80211_hw_config(local)) {
3221 printk(KERN_DEBUG "%s: failed to set channel "
3222 "%d (%d MHz) for scan\n", dev->name,
3223 chan->chan, chan->freq);
3224 skip = 1;
3225 }
3226 }
3227
3228 local->scan_channel_idx++;
3229 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3230 if (local->scan_hw_mode->list.next != &local->modes_list) {
3231 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3232 struct ieee80211_hw_mode,
3233 list);
3234 local->scan_channel_idx = 0;
3235 }
3236 }
3237
3238 if (skip)
3239 break;
3240
3241 next_delay = IEEE80211_PROBE_DELAY +
3242 usecs_to_jiffies(local->hw.channel_change_time);
3243 local->scan_state = SCAN_SEND_PROBE;
3244 break;
3245 case SCAN_SEND_PROBE:
3246 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3247 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3248 local->scan_ssid_len);
3249 next_delay = IEEE80211_CHANNEL_TIME;
3250 } else
3251 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3252 local->scan_state = SCAN_SET_CHANNEL;
3253 break;
3254 }
3255
ece8eddd 3256 if (local->sta_sw_scanning)
f0706e82
JB		 3257 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3258 next_delay);
3259}
3260
3261
3262static int ieee80211_sta_start_scan(struct net_device *dev,
3263 u8 *ssid, size_t ssid_len)
3264{
3265 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3266 struct ieee80211_sub_if_data *sdata;
3267
3268 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3269 return -EINVAL;
3270
3271 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3272 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3273 * BSSID: MACAddress
3274 * SSID
3275 * ScanType: ACTIVE, PASSIVE
3276 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3277 * a Probe frame during active scanning
3278 * ChannelList
3279 * MinChannelTime (>= ProbeDelay), in TU
3280 * MaxChannelTime: (>= MinChannelTime), in TU
3281 */
3282
3283 /* MLME-SCAN.confirm
3284 * BSSDescriptionSet
3285 * ResultCode: SUCCESS, INVALID_PARAMETERS
3286 */
3287
ece8eddd 3288 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3289 if (local->scan_dev == dev)
3290 return 0;
3291 return -EBUSY;
3292 }
3293
3294 if (local->ops->hw_scan) {
3295 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3296 ssid, ssid_len);
f0706e82 3297 if (!rc) {
ece8eddd 3298 local->sta_hw_scanning = 1;
f0706e82
JB		 3299 local->scan_dev = dev;
3300 }
3301 return rc;
3302 }
3303
ece8eddd 3304 local->sta_sw_scanning = 1;
f0706e82 3305
79010420
JB		 3306 rcu_read_lock();
3307 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3308
3309 /* Don't stop the master interface, otherwise we can't transmit
3310 * probes! */
3311 if (sdata->dev == local->mdev)
3312 continue;
3313
f0706e82 3314 netif_stop_queue(sdata->dev);
51fb61e7 3315 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3316 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3317 ieee80211_send_nullfunc(local, sdata, 1);
3318 }
79010420 3319 rcu_read_unlock();
f0706e82
JB		 3320
3321 if (ssid) {
3322 local->scan_ssid_len = ssid_len;
3323 memcpy(local->scan_ssid, ssid, ssid_len);
3324 } else
3325 local->scan_ssid_len = 0;
3326 local->scan_state = SCAN_SET_CHANNEL;
3327 local->scan_hw_mode = list_entry(local->modes_list.next,
3328 struct ieee80211_hw_mode,
3329 list);
3330 local->scan_channel_idx = 0;
3331 local->scan_dev = dev;
3332
4150c572
JB		 3333 netif_tx_lock_bh(local->mdev);
3334 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3335 local->ops->configure_filter(local_to_hw(local),
3336 FIF_BCN_PRBRESP_PROMISC,
3337 &local->filter_flags,
3338 local->mdev->mc_count,
3339 local->mdev->mc_list);
3340 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3341
3342 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3343 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3344 IEEE80211_CHANNEL_TIME);
3345
3346 return 0;
3347}
3348
3349
3350int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3351{
3352 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3353 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3354 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3355
51fb61e7 3356 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3357 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3358
ece8eddd 3359 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3360 if (local->scan_dev == dev)
3361 return 0;
3362 return -EBUSY;
3363 }
3364
a0af5f14
HS		 3365 ifsta->scan_ssid_len = ssid_len;
3366 if (ssid_len)
3367 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3368 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3369 queue_work(local->hw.workqueue, &ifsta->work);
3370 return 0;
3371}
3372
3373static char *
3374ieee80211_sta_scan_result(struct net_device *dev,
3375 struct ieee80211_sta_bss *bss,
3376 char *current_ev, char *end_buf)
3377{
3378 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3379 struct iw_event iwe;
3380
3381 if (time_after(jiffies,
3382 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3383 return current_ev;
3384
3385 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3386 return current_ev;
3387
f0706e82
JB		 3388 memset(&iwe, 0, sizeof(iwe));
3389 iwe.cmd = SIOCGIWAP;
3390 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3391 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3392 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3393 IW_EV_ADDR_LEN);
3394
3395 memset(&iwe, 0, sizeof(iwe));
3396 iwe.cmd = SIOCGIWESSID;
3397 iwe.u.data.length = bss->ssid_len;
3398 iwe.u.data.flags = 1;
3399 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3400 bss->ssid);
3401
3402 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3403 memset(&iwe, 0, sizeof(iwe));
3404 iwe.cmd = SIOCGIWMODE;
3405 if (bss->capability & WLAN_CAPABILITY_ESS)
3406 iwe.u.mode = IW_MODE_MASTER;
3407 else
3408 iwe.u.mode = IW_MODE_ADHOC;
3409 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3410 IW_EV_UINT_LEN);
3411 }
3412
3413 memset(&iwe, 0, sizeof(iwe));
3414 iwe.cmd = SIOCGIWFREQ;
3415 iwe.u.freq.m = bss->channel;
3416 iwe.u.freq.e = 0;
3417 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3418 IW_EV_FREQ_LEN);
3419 iwe.u.freq.m = bss->freq * 100000;
3420 iwe.u.freq.e = 1;
3421 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3422 IW_EV_FREQ_LEN);
3423
3424 memset(&iwe, 0, sizeof(iwe));
3425 iwe.cmd = IWEVQUAL;
3426 iwe.u.qual.qual = bss->signal;
3427 iwe.u.qual.level = bss->rssi;
3428 iwe.u.qual.noise = bss->noise;
3429 iwe.u.qual.updated = local->wstats_flags;
3430 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3431 IW_EV_QUAL_LEN);
3432
3433 memset(&iwe, 0, sizeof(iwe));
3434 iwe.cmd = SIOCGIWENCODE;
3435 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3436 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3437 else
3438 iwe.u.data.flags = IW_ENCODE_DISABLED;
3439 iwe.u.data.length = 0;
3440 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3441
3442 if (bss && bss->wpa_ie) {
3443 memset(&iwe, 0, sizeof(iwe));
3444 iwe.cmd = IWEVGENIE;
3445 iwe.u.data.length = bss->wpa_ie_len;
3446 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3447 bss->wpa_ie);
3448 }
3449
3450 if (bss && bss->rsn_ie) {
3451 memset(&iwe, 0, sizeof(iwe));
3452 iwe.cmd = IWEVGENIE;
3453 iwe.u.data.length = bss->rsn_ie_len;
3454 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3455 bss->rsn_ie);
3456 }
3457
3458 if (bss && bss->supp_rates_len > 0) {
3459 /* display all supported rates in readable format */
3460 char *p = current_ev + IW_EV_LCP_LEN;
3461 int i;
3462
3463 memset(&iwe, 0, sizeof(iwe));
3464 iwe.cmd = SIOCGIWRATE;
3465 /* Those two flags are ignored... */
3466 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3467
3468 for (i = 0; i < bss->supp_rates_len; i++) {
3469 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3470 0x7f) * 500000);
3471 p = iwe_stream_add_value(current_ev, p,
3472 end_buf, &iwe, IW_EV_PARAM_LEN);
3473 }
3474 current_ev = p;
3475 }
3476
3477 if (bss) {
3478 char *buf;
3479 buf = kmalloc(30, GFP_ATOMIC);
3480 if (buf) {
3481 memset(&iwe, 0, sizeof(iwe));
3482 iwe.cmd = IWEVCUSTOM;
3483 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3484 iwe.u.data.length = strlen(buf);
3485 current_ev = iwe_stream_add_point(current_ev, end_buf,
3486 &iwe, buf);
3487 kfree(buf);
3488 }
3489 }
3490
f0706e82
JB		 3491 return current_ev;
3492}
3493
3494
3495int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3496{
3497 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3498 char *current_ev = buf;
3499 char *end_buf = buf + len;
3500 struct ieee80211_sta_bss *bss;
3501
3502 spin_lock_bh(&local->sta_bss_lock);
3503 list_for_each_entry(bss, &local->sta_bss_list, list) {
3504 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3505 spin_unlock_bh(&local->sta_bss_lock);
3506 return -E2BIG;
3507 }
3508 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3509 end_buf);
3510 }
3511 spin_unlock_bh(&local->sta_bss_lock);
3512 return current_ev - buf;
3513}
3514
3515
3516int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3517{
3518 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3519 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3520 kfree(ifsta->extra_ie);
3521 if (len == 0) {
3522 ifsta->extra_ie = NULL;
3523 ifsta->extra_ie_len = 0;
3524 return 0;
3525 }
3526 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3527 if (!ifsta->extra_ie) {
3528 ifsta->extra_ie_len = 0;
3529 return -ENOMEM;
3530 }
3531 memcpy(ifsta->extra_ie, ie, len);
3532 ifsta->extra_ie_len = len;
3533 return 0;
3534}
3535
3536
3537struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3538 struct sk_buff *skb, u8 *bssid,
3539 u8 *addr)
3540{
3541 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3542 struct sta_info *sta;
91fa558b 3543 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3544 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3545
3546 /* TODO: Could consider removing the least recently used entry and
3547 * allow new one to be added. */
3548 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3549 if (net_ratelimit()) {
3550 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3551 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3552 }
3553 return NULL;
3554 }
3555
0795af57 3556 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3557 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3558
3559 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3560 if (!sta)
3561 return NULL;
3562
3563 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3564
3565 rate_control_rate_init(sta, local);
3566
3567 return sta; /* caller will call sta_info_put() */
3568}
3569
3570
3571int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3572{
3573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3574 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3575
3576 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3577 dev->name, reason);
3578
51fb61e7
JB		 3579 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3580 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 3581 return -EINVAL;
3582
3583 ieee80211_send_deauth(dev, ifsta, reason);
3584 ieee80211_set_disassoc(dev, ifsta, 1);
3585 return 0;
3586}
3587
3588
3589int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3590{
3591 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3592 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3593
3594 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3595 dev->name, reason);
3596
51fb61e7 3597 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3598 return -EINVAL;
3599
d6f2da5b 3600 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3601 return -1;
3602
3603 ieee80211_send_disassoc(dev, ifsta, reason);
3604 ieee80211_set_disassoc(dev, ifsta, 0);
3605 return 0;
3606}
Linux kernel - Deliverables
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