projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: fix allmulti/promisc behaviour
[linux-2.6-block.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
60static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
61 u8 *ssid, size_t ssid_len);
62static struct ieee80211_sta_bss *
cffdd30d
JL		 63ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
64 u8 *ssid, u8 ssid_len);
f0706e82
JB		 65static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69static int ieee80211_sta_wep_configured(struct net_device *dev);
70static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76/* Parsed Information Elements */
77struct ieee802_11_elems {
5558235c 78 /* pointers to IEs */
f0706e82 79 u8 *ssid;
f0706e82 80 u8 *supp_rates;
f0706e82 81 u8 *fh_params;
f0706e82 82 u8 *ds_params;
f0706e82 83 u8 *cf_params;
f0706e82 84 u8 *tim;
f0706e82 85 u8 *ibss_params;
f0706e82 86 u8 *challenge;
f0706e82 87 u8 *wpa;
f0706e82 88 u8 *rsn;
f0706e82 89 u8 *erp_info;
f0706e82 90 u8 *ext_supp_rates;
f0706e82 91 u8 *wmm_info;
f0706e82 92 u8 *wmm_param;
5558235c
JB		 93
94 /* length of them, respectively */
95 u8 ssid_len;
96 u8 supp_rates_len;
97 u8 fh_params_len;
98 u8 ds_params_len;
99 u8 cf_params_len;
100 u8 tim_len;
101 u8 ibss_params_len;
102 u8 challenge_len;
103 u8 wpa_len;
104 u8 rsn_len;
105 u8 erp_info_len;
106 u8 ext_supp_rates_len;
107 u8 wmm_info_len;
f0706e82
JB		 108 u8 wmm_param_len;
109};
110
67a4cce4
JL		 111static void ieee802_11_parse_elems(u8 *start, size_t len,
112 struct ieee802_11_elems *elems)
f0706e82
JB		 113{
114 size_t left = len;
115 u8 *pos = start;
f0706e82
JB		 116
117 memset(elems, 0, sizeof(*elems));
118
119 while (left >= 2) {
120 u8 id, elen;
121
122 id = *pos++;
123 elen = *pos++;
124 left -= 2;
125
67a4cce4
JL		 126 if (elen > left)
127 return;
f0706e82
JB		 128
129 switch (id) {
130 case WLAN_EID_SSID:
131 elems->ssid = pos;
132 elems->ssid_len = elen;
133 break;
134 case WLAN_EID_SUPP_RATES:
135 elems->supp_rates = pos;
136 elems->supp_rates_len = elen;
137 break;
138 case WLAN_EID_FH_PARAMS:
139 elems->fh_params = pos;
140 elems->fh_params_len = elen;
141 break;
142 case WLAN_EID_DS_PARAMS:
143 elems->ds_params = pos;
144 elems->ds_params_len = elen;
145 break;
146 case WLAN_EID_CF_PARAMS:
147 elems->cf_params = pos;
148 elems->cf_params_len = elen;
149 break;
150 case WLAN_EID_TIM:
151 elems->tim = pos;
152 elems->tim_len = elen;
153 break;
154 case WLAN_EID_IBSS_PARAMS:
155 elems->ibss_params = pos;
156 elems->ibss_params_len = elen;
157 break;
158 case WLAN_EID_CHALLENGE:
159 elems->challenge = pos;
160 elems->challenge_len = elen;
161 break;
162 case WLAN_EID_WPA:
163 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
164 pos[2] == 0xf2) {
165 /* Microsoft OUI (00:50:F2) */
166 if (pos[3] == 1) {
167 /* OUI Type 1 - WPA IE */
168 elems->wpa = pos;
169 elems->wpa_len = elen;
170 } else if (elen >= 5 && pos[3] == 2) {
171 if (pos[4] == 0) {
172 elems->wmm_info = pos;
173 elems->wmm_info_len = elen;
174 } else if (pos[4] == 1) {
175 elems->wmm_param = pos;
176 elems->wmm_param_len = elen;
177 }
178 }
179 }
180 break;
181 case WLAN_EID_RSN:
182 elems->rsn = pos;
183 elems->rsn_len = elen;
184 break;
185 case WLAN_EID_ERP_INFO:
186 elems->erp_info = pos;
187 elems->erp_info_len = elen;
188 break;
189 case WLAN_EID_EXT_SUPP_RATES:
190 elems->ext_supp_rates = pos;
191 elems->ext_supp_rates_len = elen;
192 break;
193 default:
f0706e82
JB		 194 break;
195 }
196
197 left -= elen;
198 pos += elen;
199 }
f0706e82
JB		 200}
201
202
f0706e82
JB		 203static int ecw2cw(int ecw)
204{
205 int cw = 1;
206 while (ecw > 0) {
207 cw <<= 1;
208 ecw--;
209 }
210 return cw - 1;
211}
212
f0706e82
JB		 213static void ieee80211_sta_wmm_params(struct net_device *dev,
214 struct ieee80211_if_sta *ifsta,
215 u8 *wmm_param, size_t wmm_param_len)
216{
217 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
218 struct ieee80211_tx_queue_params params;
219 size_t left;
220 int count;
221 u8 *pos;
222
223 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
224 return;
225 count = wmm_param[6] & 0x0f;
226 if (count == ifsta->wmm_last_param_set)
227 return;
228 ifsta->wmm_last_param_set = count;
229
230 pos = wmm_param + 8;
231 left = wmm_param_len - 8;
232
233 memset(&params, 0, sizeof(params));
234
235 if (!local->ops->conf_tx)
236 return;
237
238 local->wmm_acm = 0;
239 for (; left >= 4; left -= 4, pos += 4) {
240 int aci = (pos[0] >> 5) & 0x03;
241 int acm = (pos[0] >> 4) & 0x01;
242 int queue;
243
244 switch (aci) {
245 case 1:
246 queue = IEEE80211_TX_QUEUE_DATA3;
247 if (acm) {
248 local->wmm_acm |= BIT(0) | BIT(3);
249 }
250 break;
251 case 2:
252 queue = IEEE80211_TX_QUEUE_DATA1;
253 if (acm) {
254 local->wmm_acm |= BIT(4) | BIT(5);
255 }
256 break;
257 case 3:
258 queue = IEEE80211_TX_QUEUE_DATA0;
259 if (acm) {
260 local->wmm_acm |= BIT(6) | BIT(7);
261 }
262 break;
263 case 0:
264 default:
265 queue = IEEE80211_TX_QUEUE_DATA2;
266 if (acm) {
267 local->wmm_acm |= BIT(1) | BIT(2);
268 }
269 break;
270 }
271
272 params.aifs = pos[0] & 0x0f;
273 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
274 params.cw_min = ecw2cw(pos[1] & 0x0f);
275 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
276 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
277 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
278 "cWmin=%d cWmax=%d burst=%d\n",
279 dev->name, queue, aci, acm, params.aifs, params.cw_min,
280 params.cw_max, params.burst_time);
281 /* TODO: handle ACM (block TX, fallback to next lowest allowed
282 * AC for now) */
283 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
284 printk(KERN_DEBUG "%s: failed to set TX queue "
285 "parameters for queue %d\n", dev->name, queue);
286 }
287 }
288}
289
290
5628221c
DD		 291static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
292{
5628221c
DD		 293 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
294 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
295 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 296 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 297 u8 changes = 0;
0795af57 298 DECLARE_MAC_BUF(mac);
5628221c 299
13262ffd 300 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
5628221c
DD		 301 if (net_ratelimit()) {
302 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 303 "%s)\n",
5628221c
DD		 304 dev->name,
305 use_protection ? "enabled" : "disabled",
0795af57 306 print_mac(mac, ifsta->bssid));
5628221c 307 }
13262ffd
JS		 308 if (use_protection)
309 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
310 else
311 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
d9430a32 312 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 313 }
7e9ed188 314
13262ffd 315 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
7e9ed188
DD		 316 if (net_ratelimit()) {
317 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 318 " (BSSID=%s)\n",
7e9ed188
DD		 319 dev->name,
320 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
321 "short" : "long",
0795af57 322 print_mac(mac, ifsta->bssid));
7e9ed188 323 }
13262ffd
JS		 324 if (preamble_mode)
325 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
326 else
327 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
d9430a32 328 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 329 }
d9430a32
DD		 330
331 if (changes)
332 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 333}
334
335
f0706e82
JB		 336static void ieee80211_sta_send_associnfo(struct net_device *dev,
337 struct ieee80211_if_sta *ifsta)
338{
339 char *buf;
340 size_t len;
341 int i;
342 union iwreq_data wrqu;
343
344 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
345 return;
346
347 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 348 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 349 if (!buf)
350 return;
351
352 len = sprintf(buf, "ASSOCINFO(");
353 if (ifsta->assocreq_ies) {
354 len += sprintf(buf + len, "ReqIEs=");
355 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
356 len += sprintf(buf + len, "%02x",
357 ifsta->assocreq_ies[i]);
358 }
359 }
360 if (ifsta->assocresp_ies) {
361 if (ifsta->assocreq_ies)
362 len += sprintf(buf + len, " ");
363 len += sprintf(buf + len, "RespIEs=");
364 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
365 len += sprintf(buf + len, "%02x",
366 ifsta->assocresp_ies[i]);
367 }
368 }
369 len += sprintf(buf + len, ")");
370
371 if (len > IW_CUSTOM_MAX) {
372 len = sprintf(buf, "ASSOCRESPIE=");
373 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
374 len += sprintf(buf + len, "%02x",
375 ifsta->assocresp_ies[i]);
376 }
377 }
378
379 memset(&wrqu, 0, sizeof(wrqu));
380 wrqu.data.length = len;
381 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
382
383 kfree(buf);
384}
385
386
387static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 388 struct ieee80211_if_sta *ifsta,
47f0c502 389 bool assoc)
f0706e82 390{
47f0c502 391 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 392 union iwreq_data wrqu;
393
d6f2da5b 394 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
f0706e82
JB		 395 return;
396
f0706e82
JB		 397 if (assoc) {
398 struct ieee80211_sub_if_data *sdata;
5628221c 399 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 400
401 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
402
f0706e82
JB		 403 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
404 if (sdata->type != IEEE80211_IF_TYPE_STA)
405 return;
5628221c 406
65c107ab 407 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 408 local->hw.conf.channel,
409 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 410 if (bss) {
411 if (bss->has_erp_value)
412 ieee80211_handle_erp_ie(dev, bss->erp_value);
413 ieee80211_rx_bss_put(dev, bss);
414 }
415
f0706e82 416 netif_carrier_on(dev);
d6f2da5b 417 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 418 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
419 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
420 ieee80211_sta_send_associnfo(dev, ifsta);
421 } else {
d6f2da5b
JS		 422 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
423
f0706e82 424 netif_carrier_off(dev);
d9430a32 425 ieee80211_reset_erp_info(dev);
f0706e82
JB		 426 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
427 }
428 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
429 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
430 ifsta->last_probe = jiffies;
47f0c502 431 ieee80211_led_assoc(local, assoc);
f0706e82
JB		 432}
433
434static void ieee80211_set_disassoc(struct net_device *dev,
435 struct ieee80211_if_sta *ifsta, int deauth)
436{
437 if (deauth)
438 ifsta->auth_tries = 0;
439 ifsta->assoc_tries = 0;
440 ieee80211_set_associated(dev, ifsta, 0);
441}
442
443static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
444 int encrypt)
445{
446 struct ieee80211_sub_if_data *sdata;
447 struct ieee80211_tx_packet_data *pkt_data;
448
449 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
450 skb->dev = sdata->local->mdev;
451 skb_set_mac_header(skb, 0);
452 skb_set_network_header(skb, 0);
453 skb_set_transport_header(skb, 0);
454
455 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
456 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
457 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 458 if (!encrypt)
459 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 460
461 dev_queue_xmit(skb);
462}
463
464
465static void ieee80211_send_auth(struct net_device *dev,
466 struct ieee80211_if_sta *ifsta,
467 int transaction, u8 *extra, size_t extra_len,
468 int encrypt)
469{
470 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
471 struct sk_buff *skb;
472 struct ieee80211_mgmt *mgmt;
473
474 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
475 sizeof(*mgmt) + 6 + extra_len);
476 if (!skb) {
477 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
478 "frame\n", dev->name);
479 return;
480 }
481 skb_reserve(skb, local->hw.extra_tx_headroom);
482
483 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
484 memset(mgmt, 0, 24 + 6);
485 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
486 IEEE80211_STYPE_AUTH);
487 if (encrypt)
488 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
489 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
490 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
491 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
492 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
493 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
494 ifsta->auth_transaction = transaction + 1;
495 mgmt->u.auth.status_code = cpu_to_le16(0);
496 if (extra)
497 memcpy(skb_put(skb, extra_len), extra, extra_len);
498
499 ieee80211_sta_tx(dev, skb, encrypt);
500}
501
502
503static void ieee80211_authenticate(struct net_device *dev,
504 struct ieee80211_if_sta *ifsta)
505{
0795af57
JP		 506 DECLARE_MAC_BUF(mac);
507
f0706e82
JB		 508 ifsta->auth_tries++;
509 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 510 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 511 " timed out\n",
0795af57 512 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 513 ifsta->state = IEEE80211_DISABLED;
514 return;
515 }
516
517 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 518 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
519 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 520
521 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
522
523 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
524}
525
526
527static void ieee80211_send_assoc(struct net_device *dev,
528 struct ieee80211_if_sta *ifsta)
529{
530 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
531 struct ieee80211_hw_mode *mode;
532 struct sk_buff *skb;
533 struct ieee80211_mgmt *mgmt;
534 u8 *pos, *ies;
535 int i, len;
536 u16 capab;
537 struct ieee80211_sta_bss *bss;
538 int wmm = 0;
539
540 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
541 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
542 ifsta->ssid_len);
543 if (!skb) {
544 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
545 "frame\n", dev->name);
546 return;
547 }
548 skb_reserve(skb, local->hw.extra_tx_headroom);
549
550 mode = local->oper_hw_mode;
551 capab = ifsta->capab;
552 if (mode->mode == MODE_IEEE80211G) {
553 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
554 WLAN_CAPABILITY_SHORT_PREAMBLE;
555 }
cffdd30d
JL		 556 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
557 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 558 if (bss) {
559 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
560 capab |= WLAN_CAPABILITY_PRIVACY;
561 if (bss->wmm_ie) {
562 wmm = 1;
563 }
564 ieee80211_rx_bss_put(dev, bss);
565 }
566
567 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
568 memset(mgmt, 0, 24);
569 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
570 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
571 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
572
d6f2da5b 573 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 574 skb_put(skb, 10);
575 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
576 IEEE80211_STYPE_REASSOC_REQ);
577 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
578 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
579 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
580 ETH_ALEN);
581 } else {
582 skb_put(skb, 4);
583 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
584 IEEE80211_STYPE_ASSOC_REQ);
585 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
586 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
587 }
588
589 /* SSID */
590 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
591 *pos++ = WLAN_EID_SSID;
592 *pos++ = ifsta->ssid_len;
593 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
594
595 len = mode->num_rates;
596 if (len > 8)
597 len = 8;
598 pos = skb_put(skb, len + 2);
599 *pos++ = WLAN_EID_SUPP_RATES;
600 *pos++ = len;
601 for (i = 0; i < len; i++) {
602 int rate = mode->rates[i].rate;
f0706e82
JB		 603 *pos++ = (u8) (rate / 5);
604 }
605
606 if (mode->num_rates > len) {
607 pos = skb_put(skb, mode->num_rates - len + 2);
608 *pos++ = WLAN_EID_EXT_SUPP_RATES;
609 *pos++ = mode->num_rates - len;
610 for (i = len; i < mode->num_rates; i++) {
611 int rate = mode->rates[i].rate;
f0706e82
JB		 612 *pos++ = (u8) (rate / 5);
613 }
614 }
615
616 if (ifsta->extra_ie) {
617 pos = skb_put(skb, ifsta->extra_ie_len);
618 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
619 }
620
d6f2da5b 621 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 622 pos = skb_put(skb, 9);
623 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
624 *pos++ = 7; /* len */
625 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
626 *pos++ = 0x50;
627 *pos++ = 0xf2;
628 *pos++ = 2; /* WME */
629 *pos++ = 0; /* WME info */
630 *pos++ = 1; /* WME ver */
631 *pos++ = 0;
632 }
633
634 kfree(ifsta->assocreq_ies);
635 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 636 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 637 if (ifsta->assocreq_ies)
638 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
639
640 ieee80211_sta_tx(dev, skb, 0);
641}
642
643
644static void ieee80211_send_deauth(struct net_device *dev,
645 struct ieee80211_if_sta *ifsta, u16 reason)
646{
647 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
648 struct sk_buff *skb;
649 struct ieee80211_mgmt *mgmt;
650
651 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
652 if (!skb) {
653 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
654 "frame\n", dev->name);
655 return;
656 }
657 skb_reserve(skb, local->hw.extra_tx_headroom);
658
659 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
660 memset(mgmt, 0, 24);
661 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
662 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
663 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
664 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
665 IEEE80211_STYPE_DEAUTH);
666 skb_put(skb, 2);
667 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
668
669 ieee80211_sta_tx(dev, skb, 0);
670}
671
672
673static void ieee80211_send_disassoc(struct net_device *dev,
674 struct ieee80211_if_sta *ifsta, u16 reason)
675{
676 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
677 struct sk_buff *skb;
678 struct ieee80211_mgmt *mgmt;
679
680 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
681 if (!skb) {
682 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
683 "frame\n", dev->name);
684 return;
685 }
686 skb_reserve(skb, local->hw.extra_tx_headroom);
687
688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689 memset(mgmt, 0, 24);
690 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
692 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
693 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
694 IEEE80211_STYPE_DISASSOC);
695 skb_put(skb, 2);
696 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
697
698 ieee80211_sta_tx(dev, skb, 0);
699}
700
701
702static int ieee80211_privacy_mismatch(struct net_device *dev,
703 struct ieee80211_if_sta *ifsta)
704{
65c107ab 705 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 706 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 707 int bss_privacy;
708 int wep_privacy;
709 int privacy_invoked;
f0706e82 710
5b98b1f7 711 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 712 return 0;
713
cffdd30d
JL		 714 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
715 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 716 if (!bss)
717 return 0;
718
5b98b1f7
JB		 719 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
720 wep_privacy = !!ieee80211_sta_wep_configured(dev);
721 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 722
723 ieee80211_rx_bss_put(dev, bss);
724
5b98b1f7
JB		 725 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
726 return 0;
727
728 return 1;
f0706e82
JB		 729}
730
731
732static void ieee80211_associate(struct net_device *dev,
733 struct ieee80211_if_sta *ifsta)
734{
0795af57
JP		 735 DECLARE_MAC_BUF(mac);
736
f0706e82
JB		 737 ifsta->assoc_tries++;
738 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 739 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 740 " timed out\n",
0795af57 741 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 742 ifsta->state = IEEE80211_DISABLED;
743 return;
744 }
745
746 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 747 printk(KERN_DEBUG "%s: associate with AP %s\n",
748 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 749 if (ieee80211_privacy_mismatch(dev, ifsta)) {
750 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
751 "mixed-cell disabled - abort association\n", dev->name);
752 ifsta->state = IEEE80211_DISABLED;
753 return;
754 }
755
756 ieee80211_send_assoc(dev, ifsta);
757
758 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
759}
760
761
762static void ieee80211_associated(struct net_device *dev,
763 struct ieee80211_if_sta *ifsta)
764{
765 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
766 struct sta_info *sta;
767 int disassoc;
0795af57 768 DECLARE_MAC_BUF(mac);
f0706e82
JB		 769
770 /* TODO: start monitoring current AP signal quality and number of
771 * missed beacons. Scan other channels every now and then and search
772 * for better APs. */
773 /* TODO: remove expired BSSes */
774
775 ifsta->state = IEEE80211_ASSOCIATED;
776
777 sta = sta_info_get(local, ifsta->bssid);
778 if (!sta) {
0795af57
JP		 779 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
780 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 781 disassoc = 1;
782 } else {
783 disassoc = 0;
784 if (time_after(jiffies,
785 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 786 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 787 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 788 "current AP %s - assume out of "
f0706e82 789 "range\n",
0795af57 790 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 791 disassoc = 1;
be8755e1 792 sta_info_free(sta);
d6f2da5b 793 } else
f0706e82
JB		 794 ieee80211_send_probe_req(dev, ifsta->bssid,
795 local->scan_ssid,
796 local->scan_ssid_len);
d6f2da5b 797 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 798 } else {
d6f2da5b 799 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 800 if (time_after(jiffies, ifsta->last_probe +
801 IEEE80211_PROBE_INTERVAL)) {
802 ifsta->last_probe = jiffies;
803 ieee80211_send_probe_req(dev, ifsta->bssid,
804 ifsta->ssid,
805 ifsta->ssid_len);
806 }
807 }
808 sta_info_put(sta);
809 }
810 if (disassoc) {
811 union iwreq_data wrqu;
812 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
813 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
814 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
815 mod_timer(&ifsta->timer, jiffies +
816 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
817 } else {
818 mod_timer(&ifsta->timer, jiffies +
819 IEEE80211_MONITORING_INTERVAL);
820 }
821}
822
823
824static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
825 u8 *ssid, size_t ssid_len)
826{
827 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
828 struct ieee80211_hw_mode *mode;
829 struct sk_buff *skb;
830 struct ieee80211_mgmt *mgmt;
831 u8 *pos, *supp_rates, *esupp_rates = NULL;
832 int i;
833
834 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
835 if (!skb) {
836 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
837 "request\n", dev->name);
838 return;
839 }
840 skb_reserve(skb, local->hw.extra_tx_headroom);
841
842 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
843 memset(mgmt, 0, 24);
844 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
845 IEEE80211_STYPE_PROBE_REQ);
846 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
847 if (dst) {
848 memcpy(mgmt->da, dst, ETH_ALEN);
849 memcpy(mgmt->bssid, dst, ETH_ALEN);
850 } else {
851 memset(mgmt->da, 0xff, ETH_ALEN);
852 memset(mgmt->bssid, 0xff, ETH_ALEN);
853 }
854 pos = skb_put(skb, 2 + ssid_len);
855 *pos++ = WLAN_EID_SSID;
856 *pos++ = ssid_len;
857 memcpy(pos, ssid, ssid_len);
858
859 supp_rates = skb_put(skb, 2);
860 supp_rates[0] = WLAN_EID_SUPP_RATES;
861 supp_rates[1] = 0;
862 mode = local->oper_hw_mode;
863 for (i = 0; i < mode->num_rates; i++) {
864 struct ieee80211_rate *rate = &mode->rates[i];
865 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
866 continue;
867 if (esupp_rates) {
868 pos = skb_put(skb, 1);
869 esupp_rates[1]++;
870 } else if (supp_rates[1] == 8) {
871 esupp_rates = skb_put(skb, 3);
872 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
873 esupp_rates[1] = 1;
874 pos = &esupp_rates[2];
875 } else {
876 pos = skb_put(skb, 1);
877 supp_rates[1]++;
878 }
b708e610 879 *pos = rate->rate / 5;
f0706e82
JB		 880 }
881
882 ieee80211_sta_tx(dev, skb, 0);
883}
884
885
886static int ieee80211_sta_wep_configured(struct net_device *dev)
887{
888 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
889 if (!sdata || !sdata->default_key ||
8f20fc24 890 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 891 return 0;
892 return 1;
893}
894
895
896static void ieee80211_auth_completed(struct net_device *dev,
897 struct ieee80211_if_sta *ifsta)
898{
899 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 900 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 901 ieee80211_associate(dev, ifsta);
902}
903
904
905static void ieee80211_auth_challenge(struct net_device *dev,
906 struct ieee80211_if_sta *ifsta,
907 struct ieee80211_mgmt *mgmt,
908 size_t len)
909{
910 u8 *pos;
911 struct ieee802_11_elems elems;
912
913 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
914 pos = mgmt->u.auth.variable;
67a4cce4 915 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 916 if (!elems.challenge) {
917 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
918 "frame\n", dev->name);
919 return;
920 }
921 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
922 elems.challenge_len + 2, 1);
923}
924
925
926static void ieee80211_rx_mgmt_auth(struct net_device *dev,
927 struct ieee80211_if_sta *ifsta,
928 struct ieee80211_mgmt *mgmt,
929 size_t len)
930{
931 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
932 u16 auth_alg, auth_transaction, status_code;
0795af57 933 DECLARE_MAC_BUF(mac);
f0706e82
JB		 934
935 if (ifsta->state != IEEE80211_AUTHENTICATE &&
936 sdata->type != IEEE80211_IF_TYPE_IBSS) {
937 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 938 "%s, but not in authenticate state - ignored\n",
939 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 940 return;
941 }
942
943 if (len < 24 + 6) {
944 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 945 "received from %s - ignored\n",
946 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 947 return;
948 }
949
950 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
951 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
952 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 953 "unknown AP (SA=%s BSSID=%s) - "
954 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
955 print_mac(mac, mgmt->bssid));
f0706e82
JB		 956 return;
957 }
958
959 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
960 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
961 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 962 "unknown BSSID (SA=%s BSSID=%s) - "
963 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
964 print_mac(mac, mgmt->bssid));
f0706e82
JB		 965 return;
966 }
967
968 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
969 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
970 status_code = le16_to_cpu(mgmt->u.auth.status_code);
971
0795af57 972 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 973 "transaction=%d status=%d)\n",
0795af57 974 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 975 auth_transaction, status_code);
976
977 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
978 /* IEEE 802.11 standard does not require authentication in IBSS
979 * networks and most implementations do not seem to use it.
980 * However, try to reply to authentication attempts if someone
981 * has actually implemented this.
982 * TODO: Could implement shared key authentication. */
983 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
984 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
985 "frame (alg=%d transaction=%d)\n",
986 dev->name, auth_alg, auth_transaction);
987 return;
988 }
989 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
990 }
991
992 if (auth_alg != ifsta->auth_alg ||
993 auth_transaction != ifsta->auth_transaction) {
994 printk(KERN_DEBUG "%s: unexpected authentication frame "
995 "(alg=%d transaction=%d)\n",
996 dev->name, auth_alg, auth_transaction);
997 return;
998 }
999
1000 if (status_code != WLAN_STATUS_SUCCESS) {
1001 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1002 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1003 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1004 u8 algs[3];
1005 const int num_algs = ARRAY_SIZE(algs);
1006 int i, pos;
1007 algs[0] = algs[1] = algs[2] = 0xff;
1008 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1009 algs[0] = WLAN_AUTH_OPEN;
1010 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1011 algs[1] = WLAN_AUTH_SHARED_KEY;
1012 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1013 algs[2] = WLAN_AUTH_LEAP;
1014 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1015 pos = 0;
1016 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1017 pos = 1;
1018 else
1019 pos = 2;
1020 for (i = 0; i < num_algs; i++) {
1021 pos++;
1022 if (pos >= num_algs)
1023 pos = 0;
1024 if (algs[pos] == ifsta->auth_alg ||
1025 algs[pos] == 0xff)
1026 continue;
1027 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1028 !ieee80211_sta_wep_configured(dev))
1029 continue;
1030 ifsta->auth_alg = algs[pos];
1031 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1032 "next try\n",
1033 dev->name, ifsta->auth_alg);
1034 break;
1035 }
1036 }
1037 return;
1038 }
1039
1040 switch (ifsta->auth_alg) {
1041 case WLAN_AUTH_OPEN:
1042 case WLAN_AUTH_LEAP:
1043 ieee80211_auth_completed(dev, ifsta);
1044 break;
1045 case WLAN_AUTH_SHARED_KEY:
1046 if (ifsta->auth_transaction == 4)
1047 ieee80211_auth_completed(dev, ifsta);
1048 else
1049 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1050 break;
1051 }
1052}
1053
1054
1055static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1056 struct ieee80211_if_sta *ifsta,
1057 struct ieee80211_mgmt *mgmt,
1058 size_t len)
1059{
1060 u16 reason_code;
0795af57 1061 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1062
1063 if (len < 24 + 2) {
1064 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1065 "received from %s - ignored\n",
1066 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1067 return;
1068 }
1069
1070 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1071 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1072 "unknown AP (SA=%s BSSID=%s) - "
1073 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1074 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1075 return;
1076 }
1077
1078 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1079
0795af57 1080 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1081 " (reason=%d)\n",
0795af57 1082 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1083
d6f2da5b 1084 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1085 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1086 }
1087
1088 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1089 ifsta->state == IEEE80211_ASSOCIATE ||
1090 ifsta->state == IEEE80211_ASSOCIATED) {
1091 ifsta->state = IEEE80211_AUTHENTICATE;
1092 mod_timer(&ifsta->timer, jiffies +
1093 IEEE80211_RETRY_AUTH_INTERVAL);
1094 }
1095
1096 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1097 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1098}
1099
1100
1101static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1102 struct ieee80211_if_sta *ifsta,
1103 struct ieee80211_mgmt *mgmt,
1104 size_t len)
1105{
1106 u16 reason_code;
0795af57 1107 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1108
1109 if (len < 24 + 2) {
1110 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1111 "received from %s - ignored\n",
1112 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1113 return;
1114 }
1115
1116 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1117 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1118 "unknown AP (SA=%s BSSID=%s) - "
1119 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1120 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1121 return;
1122 }
1123
1124 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1125
0795af57 1126 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1127 " (reason=%d)\n",
0795af57 1128 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1129
d6f2da5b 1130 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1131 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1132
1133 if (ifsta->state == IEEE80211_ASSOCIATED) {
1134 ifsta->state = IEEE80211_ASSOCIATE;
1135 mod_timer(&ifsta->timer, jiffies +
1136 IEEE80211_RETRY_AUTH_INTERVAL);
1137 }
1138
1139 ieee80211_set_disassoc(dev, ifsta, 0);
1140}
1141
1142
1143static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1144 struct ieee80211_if_sta *ifsta,
1145 struct ieee80211_mgmt *mgmt,
1146 size_t len,
1147 int reassoc)
1148{
1149 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1150 struct ieee80211_hw_mode *mode;
1151 struct sta_info *sta;
1152 u32 rates;
1153 u16 capab_info, status_code, aid;
1154 struct ieee802_11_elems elems;
1155 u8 *pos;
1156 int i, j;
0795af57 1157 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1158
1159 /* AssocResp and ReassocResp have identical structure, so process both
1160 * of them in this function. */
1161
1162 if (ifsta->state != IEEE80211_ASSOCIATE) {
1163 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1164 "%s, but not in associate state - ignored\n",
1165 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1166 return;
1167 }
1168
1169 if (len < 24 + 6) {
1170 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1171 "received from %s - ignored\n",
1172 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1173 return;
1174 }
1175
1176 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1177 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1178 "unknown AP (SA=%s BSSID=%s) - "
1179 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1180 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1181 return;
1182 }
1183
1184 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1185 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1186 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1187
0795af57 1188 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1189 "status=%d aid=%d)\n",
0795af57 1190 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1191 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1192
1193 if (status_code != WLAN_STATUS_SUCCESS) {
1194 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1195 dev->name, status_code);
8a69aa93
DD		 1196 /* if this was a reassociation, ensure we try a "full"
1197 * association next time. This works around some broken APs
1198 * which do not correctly reject reassociation requests. */
d6f2da5b 1199 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1200 return;
1201 }
1202
1dd84aa2
JB		 1203 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1204 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1205 "set\n", dev->name, aid);
1206 aid &= ~(BIT(15) | BIT(14));
1207
f0706e82 1208 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1209 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1210
1211 if (!elems.supp_rates) {
1212 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1213 dev->name);
1214 return;
1215 }
1216
5628221c
DD		 1217 /* it probably doesn't, but if the frame includes an ERP value then
1218 * update our stored copy */
1219 if (elems.erp_info && elems.erp_info_len >= 1) {
1220 struct ieee80211_sta_bss *bss
65c107ab 1221 = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1222 local->hw.conf.channel,
1223 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 1224 if (bss) {
1225 bss->erp_value = elems.erp_info[0];
1226 bss->has_erp_value = 1;
1227 ieee80211_rx_bss_put(dev, bss);
1228 }
1229 }
1230
f0706e82
JB		 1231 printk(KERN_DEBUG "%s: associated\n", dev->name);
1232 ifsta->aid = aid;
1233 ifsta->ap_capab = capab_info;
1234
1235 kfree(ifsta->assocresp_ies);
1236 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1237 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1238 if (ifsta->assocresp_ies)
1239 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1240
1241 ieee80211_set_associated(dev, ifsta, 1);
1242
1243 /* Add STA entry for the AP */
1244 sta = sta_info_get(local, ifsta->bssid);
1245 if (!sta) {
1246 struct ieee80211_sta_bss *bss;
0ec0b7ac 1247 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1248 if (!sta) {
1249 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1250 " AP\n", dev->name);
1251 return;
1252 }
65c107ab 1253 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1254 local->hw.conf.channel,
1255 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1256 if (bss) {
1257 sta->last_rssi = bss->rssi;
1258 sta->last_signal = bss->signal;
1259 sta->last_noise = bss->noise;
1260 ieee80211_rx_bss_put(dev, bss);
1261 }
1262 }
1263
1264 sta->dev = dev;
c9ee23df 1265 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1266
1267 rates = 0;
1268 mode = local->oper_hw_mode;
1269 for (i = 0; i < elems.supp_rates_len; i++) {
1270 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1271 for (j = 0; j < mode->num_rates; j++)
1272 if (mode->rates[j].rate == rate)
1273 rates |= BIT(j);
1274 }
1275 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1276 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1277 for (j = 0; j < mode->num_rates; j++)
1278 if (mode->rates[j].rate == rate)
1279 rates |= BIT(j);
1280 }
1281 sta->supp_rates = rates;
1282
1283 rate_control_rate_init(sta, local);
1284
d6f2da5b 1285 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1286 sta->flags |= WLAN_STA_WME;
1287 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1288 elems.wmm_param_len);
1289 }
1290
1291
1292 sta_info_put(sta);
1293
1294 ieee80211_associated(dev, ifsta);
1295}
1296
1297
1298/* Caller must hold local->sta_bss_lock */
1299static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1300 struct ieee80211_sta_bss *bss)
1301{
1302 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1303 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1304 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1305}
1306
1307
1308/* Caller must hold local->sta_bss_lock */
1309static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1310 struct ieee80211_sta_bss *bss)
1311{
1312 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1313 struct ieee80211_sta_bss *b, *prev = NULL;
1314 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1315 while (b) {
1316 if (b == bss) {
1317 if (!prev)
1318 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1319 bss->hnext;
1320 else
1321 prev->hnext = bss->hnext;
1322 break;
1323 }
1324 prev = b;
1325 b = b->hnext;
1326 }
1327}
1328
1329
1330static struct ieee80211_sta_bss *
cffdd30d
JL		 1331ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1332 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1333{
1334 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1335 struct ieee80211_sta_bss *bss;
1336
dd00cc48 1337 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1338 if (!bss)
1339 return NULL;
f0706e82
JB		 1340 atomic_inc(&bss->users);
1341 atomic_inc(&bss->users);
1342 memcpy(bss->bssid, bssid, ETH_ALEN);
65c107ab 1343 bss->channel = channel;
cffdd30d
JL		 1344 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1345 memcpy(bss->ssid, ssid, ssid_len);
1346 bss->ssid_len = ssid_len;
1347 }
f0706e82
JB		 1348
1349 spin_lock_bh(&local->sta_bss_lock);
1350 /* TODO: order by RSSI? */
1351 list_add_tail(&bss->list, &local->sta_bss_list);
1352 __ieee80211_rx_bss_hash_add(dev, bss);
1353 spin_unlock_bh(&local->sta_bss_lock);
1354 return bss;
1355}
1356
1357
1358static struct ieee80211_sta_bss *
cffdd30d
JL		 1359ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1360 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1361{
1362 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1363 struct ieee80211_sta_bss *bss;
1364
1365 spin_lock_bh(&local->sta_bss_lock);
1366 bss = local->sta_bss_hash[STA_HASH(bssid)];
1367 while (bss) {
cffdd30d
JL		 1368 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1369 bss->channel == channel &&
1370 bss->ssid_len == ssid_len &&
1371 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 1372 atomic_inc(&bss->users);
1373 break;
1374 }
1375 bss = bss->hnext;
1376 }
1377 spin_unlock_bh(&local->sta_bss_lock);
1378 return bss;
1379}
1380
1381
1382static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1383{
1384 kfree(bss->wpa_ie);
1385 kfree(bss->rsn_ie);
1386 kfree(bss->wmm_ie);
1387 kfree(bss);
1388}
1389
1390
1391static void ieee80211_rx_bss_put(struct net_device *dev,
1392 struct ieee80211_sta_bss *bss)
1393{
1394 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1395 if (!atomic_dec_and_test(&bss->users))
1396 return;
1397
1398 spin_lock_bh(&local->sta_bss_lock);
1399 __ieee80211_rx_bss_hash_del(dev, bss);
1400 list_del(&bss->list);
1401 spin_unlock_bh(&local->sta_bss_lock);
1402 ieee80211_rx_bss_free(bss);
1403}
1404
1405
1406void ieee80211_rx_bss_list_init(struct net_device *dev)
1407{
1408 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1409 spin_lock_init(&local->sta_bss_lock);
1410 INIT_LIST_HEAD(&local->sta_bss_list);
1411}
1412
1413
1414void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1415{
1416 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1417 struct ieee80211_sta_bss *bss, *tmp;
1418
1419 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1420 ieee80211_rx_bss_put(dev, bss);
1421}
1422
1423
1424static void ieee80211_rx_bss_info(struct net_device *dev,
1425 struct ieee80211_mgmt *mgmt,
1426 size_t len,
1427 struct ieee80211_rx_status *rx_status,
1428 int beacon)
1429{
1430 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1431 struct ieee802_11_elems elems;
1432 size_t baselen;
67a4cce4 1433 int channel, clen;
f0706e82
JB		 1434 struct ieee80211_sta_bss *bss;
1435 struct sta_info *sta;
1436 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1437 u64 timestamp;
0795af57
JP		 1438 DECLARE_MAC_BUF(mac);
1439 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 1440
1441 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1442 return; /* ignore ProbeResp to foreign address */
1443
1444#if 0
0795af57 1445 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 1446 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 1447 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 1448#endif
1449
1450 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1451 if (baselen > len)
1452 return;
1453
1454 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1455
1456 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1457 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1458#ifdef CONFIG_MAC80211_IBSS_DEBUG
1459 static unsigned long last_tsf_debug = 0;
1460 u64 tsf;
1461 if (local->ops->get_tsf)
1462 tsf = local->ops->get_tsf(local_to_hw(local));
1463 else
1464 tsf = -1LLU;
1465 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 1466 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1467 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 1468 "@%lu\n",
0795af57 1469 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 1470 (unsigned long long)tsf,
1471 (unsigned long long)timestamp,
1472 (unsigned long long)(tsf - timestamp),
1473 jiffies);
1474 last_tsf_debug = jiffies;
1475 }
1476#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1477 }
1478
67a4cce4 1479 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82
JB		 1480
1481 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1482 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1483 (sta = sta_info_get(local, mgmt->sa))) {
1484 struct ieee80211_hw_mode *mode;
1485 struct ieee80211_rate *rates;
1486 size_t num_rates;
1487 u32 supp_rates, prev_rates;
1488 int i, j;
1489
1490 mode = local->sta_scanning ?
1491 local->scan_hw_mode : local->oper_hw_mode;
1492 rates = mode->rates;
1493 num_rates = mode->num_rates;
1494
1495 supp_rates = 0;
1496 for (i = 0; i < elems.supp_rates_len +
1497 elems.ext_supp_rates_len; i++) {
1498 u8 rate = 0;
1499 int own_rate;
1500 if (i < elems.supp_rates_len)
1501 rate = elems.supp_rates[i];
1502 else if (elems.ext_supp_rates)
1503 rate = elems.ext_supp_rates
1504 [i - elems.supp_rates_len];
1505 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 1506 for (j = 0; j < num_rates; j++)
1507 if (rates[j].rate == own_rate)
1508 supp_rates |= BIT(j);
1509 }
1510
1511 prev_rates = sta->supp_rates;
1512 sta->supp_rates &= supp_rates;
1513 if (sta->supp_rates == 0) {
1514 /* No matching rates - this should not really happen.
1515 * Make sure that at least one rate is marked
1516 * supported to avoid issues with TX rate ctrl. */
1517 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1518 }
1519 if (sta->supp_rates != prev_rates) {
1520 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 1521 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 1522 "0x%x)\n",
0795af57 1523 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 1524 supp_rates, sta->supp_rates);
1525 }
1526 sta_info_put(sta);
1527 }
1528
1529 if (!elems.ssid)
1530 return;
1531
1532 if (elems.ds_params && elems.ds_params_len == 1)
1533 channel = elems.ds_params[0];
1534 else
1535 channel = rx_status->channel;
1536
cffdd30d
JL		 1537 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1538 elems.ssid, elems.ssid_len);
f0706e82 1539 if (!bss) {
cffdd30d
JL		 1540 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1541 elems.ssid, elems.ssid_len);
f0706e82
JB		 1542 if (!bss)
1543 return;
1544 } else {
1545#if 0
1546 /* TODO: order by RSSI? */
1547 spin_lock_bh(&local->sta_bss_lock);
1548 list_move_tail(&bss->list, &local->sta_bss_list);
1549 spin_unlock_bh(&local->sta_bss_lock);
1550#endif
1551 }
1552
1553 if (bss->probe_resp && beacon) {
1554 /* Do not allow beacon to override data from Probe Response. */
1555 ieee80211_rx_bss_put(dev, bss);
1556 return;
1557 }
1558
5628221c
DD		 1559 /* save the ERP value so that it is available at association time */
1560 if (elems.erp_info && elems.erp_info_len >= 1) {
1561 bss->erp_value = elems.erp_info[0];
1562 bss->has_erp_value = 1;
1563 }
1564
f0706e82
JB		 1565 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1566 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 1567
1568 bss->supp_rates_len = 0;
1569 if (elems.supp_rates) {
1570 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1571 if (clen > elems.supp_rates_len)
1572 clen = elems.supp_rates_len;
1573 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1574 clen);
1575 bss->supp_rates_len += clen;
1576 }
1577 if (elems.ext_supp_rates) {
1578 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1579 if (clen > elems.ext_supp_rates_len)
1580 clen = elems.ext_supp_rates_len;
1581 memcpy(&bss->supp_rates[bss->supp_rates_len],
1582 elems.ext_supp_rates, clen);
1583 bss->supp_rates_len += clen;
1584 }
1585
1586 if (elems.wpa &&
1587 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1588 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1589 kfree(bss->wpa_ie);
1590 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1591 if (bss->wpa_ie) {
1592 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1593 bss->wpa_ie_len = elems.wpa_len + 2;
1594 } else
1595 bss->wpa_ie_len = 0;
1596 } else if (!elems.wpa && bss->wpa_ie) {
1597 kfree(bss->wpa_ie);
1598 bss->wpa_ie = NULL;
1599 bss->wpa_ie_len = 0;
1600 }
1601
1602 if (elems.rsn &&
1603 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1604 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1605 kfree(bss->rsn_ie);
1606 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1607 if (bss->rsn_ie) {
1608 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1609 bss->rsn_ie_len = elems.rsn_len + 2;
1610 } else
1611 bss->rsn_ie_len = 0;
1612 } else if (!elems.rsn && bss->rsn_ie) {
1613 kfree(bss->rsn_ie);
1614 bss->rsn_ie = NULL;
1615 bss->rsn_ie_len = 0;
1616 }
1617
1618 if (elems.wmm_param &&
1619 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1620 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1621 kfree(bss->wmm_ie);
1622 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1623 if (bss->wmm_ie) {
1624 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1625 elems.wmm_param_len + 2);
1626 bss->wmm_ie_len = elems.wmm_param_len + 2;
1627 } else
1628 bss->wmm_ie_len = 0;
1629 } else if (!elems.wmm_param && bss->wmm_ie) {
1630 kfree(bss->wmm_ie);
1631 bss->wmm_ie = NULL;
1632 bss->wmm_ie_len = 0;
1633 }
1634
1635
1636 bss->hw_mode = rx_status->phymode;
f0706e82
JB		 1637 bss->freq = rx_status->freq;
1638 if (channel != rx_status->channel &&
1639 (bss->hw_mode == MODE_IEEE80211G ||
1640 bss->hw_mode == MODE_IEEE80211B) &&
1641 channel >= 1 && channel <= 14) {
1642 static const int freq_list[] = {
1643 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1644 2447, 2452, 2457, 2462, 2467, 2472, 2484
1645 };
1646 /* IEEE 802.11g/b mode can receive packets from neighboring
1647 * channels, so map the channel into frequency. */
1648 bss->freq = freq_list[channel - 1];
1649 }
1650 bss->timestamp = timestamp;
1651 bss->last_update = jiffies;
1652 bss->rssi = rx_status->ssi;
1653 bss->signal = rx_status->signal;
1654 bss->noise = rx_status->noise;
1655 if (!beacon)
1656 bss->probe_resp++;
1657 ieee80211_rx_bss_put(dev, bss);
1658}
1659
1660
1661static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1662 struct ieee80211_mgmt *mgmt,
1663 size_t len,
1664 struct ieee80211_rx_status *rx_status)
1665{
1666 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1667}
1668
1669
1670static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1671 struct ieee80211_mgmt *mgmt,
1672 size_t len,
1673 struct ieee80211_rx_status *rx_status)
1674{
f0706e82
JB		 1675 struct ieee80211_sub_if_data *sdata;
1676 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1677 size_t baselen;
1678 struct ieee802_11_elems elems;
1679
1680 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1681
1682 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1683 if (sdata->type != IEEE80211_IF_TYPE_STA)
1684 return;
1685 ifsta = &sdata->u.sta;
1686
d6f2da5b 1687 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1688 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1689 return;
1690
1691 /* Process beacon from the current BSS */
1692 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1693 if (baselen > len)
1694 return;
1695
67a4cce4 1696 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 1697
5628221c
DD		 1698 if (elems.erp_info && elems.erp_info_len >= 1)
1699 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82 1700
d6f2da5b 1701 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1702 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1703 elems.wmm_param_len);
1704 }
1705}
1706
1707
1708static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1709 struct ieee80211_if_sta *ifsta,
1710 struct ieee80211_mgmt *mgmt,
1711 size_t len,
1712 struct ieee80211_rx_status *rx_status)
1713{
1714 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1715 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1716 int tx_last_beacon;
1717 struct sk_buff *skb;
1718 struct ieee80211_mgmt *resp;
1719 u8 *pos, *end;
0795af57
JP		 1720 DECLARE_MAC_BUF(mac);
1721#ifdef CONFIG_MAC80211_IBSS_DEBUG
1722 DECLARE_MAC_BUF(mac2);
1723 DECLARE_MAC_BUF(mac3);
1724#endif
f0706e82
JB		 1725
1726 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1727 ifsta->state != IEEE80211_IBSS_JOINED ||
1728 len < 24 + 2 || !ifsta->probe_resp)
1729 return;
1730
1731 if (local->ops->tx_last_beacon)
1732 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1733 else
1734 tx_last_beacon = 1;
1735
1736#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1737 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1738 "%s (tx_last_beacon=%d)\n",
1739 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1740 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1741#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1742
1743 if (!tx_last_beacon)
1744 return;
1745
1746 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1747 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1748 return;
1749
1750 end = ((u8 *) mgmt) + len;
1751 pos = mgmt->u.probe_req.variable;
1752 if (pos[0] != WLAN_EID_SSID ||
1753 pos + 2 + pos[1] > end) {
1754 if (net_ratelimit()) {
1755 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 1756 "from %s\n",
1757 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1758 }
1759 return;
1760 }
1761 if (pos[1] != 0 &&
1762 (pos[1] != ifsta->ssid_len ||
1763 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1764 /* Ignore ProbeReq for foreign SSID */
1765 return;
1766 }
1767
1768 /* Reply with ProbeResp */
0ec0b7ac 1769 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1770 if (!skb)
1771 return;
1772
1773 resp = (struct ieee80211_mgmt *) skb->data;
1774 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1775#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1776 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1777 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 1778#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1779 ieee80211_sta_tx(dev, skb, 0);
1780}
1781
1782
1783void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1784 struct ieee80211_rx_status *rx_status)
1785{
1786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1787 struct ieee80211_sub_if_data *sdata;
1788 struct ieee80211_if_sta *ifsta;
1789 struct ieee80211_mgmt *mgmt;
1790 u16 fc;
1791
1792 if (skb->len < 24)
1793 goto fail;
1794
1795 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1796 ifsta = &sdata->u.sta;
1797
1798 mgmt = (struct ieee80211_mgmt *) skb->data;
1799 fc = le16_to_cpu(mgmt->frame_control);
1800
1801 switch (fc & IEEE80211_FCTL_STYPE) {
1802 case IEEE80211_STYPE_PROBE_REQ:
1803 case IEEE80211_STYPE_PROBE_RESP:
1804 case IEEE80211_STYPE_BEACON:
1805 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1806 case IEEE80211_STYPE_AUTH:
1807 case IEEE80211_STYPE_ASSOC_RESP:
1808 case IEEE80211_STYPE_REASSOC_RESP:
1809 case IEEE80211_STYPE_DEAUTH:
1810 case IEEE80211_STYPE_DISASSOC:
1811 skb_queue_tail(&ifsta->skb_queue, skb);
1812 queue_work(local->hw.workqueue, &ifsta->work);
1813 return;
1814 default:
1815 printk(KERN_DEBUG "%s: received unknown management frame - "
1816 "stype=%d\n", dev->name,
1817 (fc & IEEE80211_FCTL_STYPE) >> 4);
1818 break;
1819 }
1820
1821 fail:
1822 kfree_skb(skb);
1823}
1824
1825
1826static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1827 struct sk_buff *skb)
1828{
1829 struct ieee80211_rx_status *rx_status;
1830 struct ieee80211_sub_if_data *sdata;
1831 struct ieee80211_if_sta *ifsta;
1832 struct ieee80211_mgmt *mgmt;
1833 u16 fc;
1834
1835 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1836 ifsta = &sdata->u.sta;
1837
1838 rx_status = (struct ieee80211_rx_status *) skb->cb;
1839 mgmt = (struct ieee80211_mgmt *) skb->data;
1840 fc = le16_to_cpu(mgmt->frame_control);
1841
1842 switch (fc & IEEE80211_FCTL_STYPE) {
1843 case IEEE80211_STYPE_PROBE_REQ:
1844 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1845 rx_status);
1846 break;
1847 case IEEE80211_STYPE_PROBE_RESP:
1848 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1849 break;
1850 case IEEE80211_STYPE_BEACON:
1851 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1852 break;
1853 case IEEE80211_STYPE_AUTH:
1854 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1855 break;
1856 case IEEE80211_STYPE_ASSOC_RESP:
1857 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1858 break;
1859 case IEEE80211_STYPE_REASSOC_RESP:
1860 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1861 break;
1862 case IEEE80211_STYPE_DEAUTH:
1863 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1864 break;
1865 case IEEE80211_STYPE_DISASSOC:
1866 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1867 break;
1868 }
1869
1870 kfree_skb(skb);
1871}
1872
1873
1874void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1875 struct ieee80211_rx_status *rx_status)
1876{
1877 struct ieee80211_mgmt *mgmt;
1878 u16 fc;
1879
1880 if (skb->len < 24) {
1881 dev_kfree_skb(skb);
1882 return;
1883 }
1884
1885 mgmt = (struct ieee80211_mgmt *) skb->data;
1886 fc = le16_to_cpu(mgmt->frame_control);
1887
1888 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1889 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1890 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1891 skb->len, rx_status);
1892 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1893 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1894 rx_status);
1895 }
1896 }
1897
1898 dev_kfree_skb(skb);
1899}
1900
1901
1902static int ieee80211_sta_active_ibss(struct net_device *dev)
1903{
1904 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1905 int active = 0;
1906 struct sta_info *sta;
1907
be8755e1 1908 read_lock_bh(&local->sta_lock);
f0706e82
JB		 1909 list_for_each_entry(sta, &local->sta_list, list) {
1910 if (sta->dev == dev &&
1911 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1912 jiffies)) {
1913 active++;
1914 break;
1915 }
1916 }
be8755e1 1917 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 1918
1919 return active;
1920}
1921
1922
1923static void ieee80211_sta_expire(struct net_device *dev)
1924{
1925 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1926 struct sta_info *sta, *tmp;
be8755e1 1927 LIST_HEAD(tmp_list);
0795af57 1928 DECLARE_MAC_BUF(mac);
f0706e82 1929
be8755e1 1930 write_lock_bh(&local->sta_lock);
f0706e82
JB		 1931 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1932 if (time_after(jiffies, sta->last_rx +
1933 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 1934 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
1935 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 1936 __sta_info_get(sta);
1937 sta_info_remove(sta);
1938 list_add(&sta->list, &tmp_list);
f0706e82 1939 }
be8755e1
MW		 1940 write_unlock_bh(&local->sta_lock);
1941
1942 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1943 sta_info_free(sta);
1944 sta_info_put(sta);
1945 }
f0706e82
JB		 1946}
1947
1948
1949static void ieee80211_sta_merge_ibss(struct net_device *dev,
1950 struct ieee80211_if_sta *ifsta)
1951{
1952 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1953
1954 ieee80211_sta_expire(dev);
1955 if (ieee80211_sta_active_ibss(dev))
1956 return;
1957
1958 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1959 "IBSS networks with same SSID (merge)\n", dev->name);
1960 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1961}
1962
1963
1964void ieee80211_sta_timer(unsigned long data)
1965{
1966 struct ieee80211_sub_if_data *sdata =
1967 (struct ieee80211_sub_if_data *) data;
1968 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1969 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1970
1971 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1972 queue_work(local->hw.workqueue, &ifsta->work);
1973}
1974
1975
1976void ieee80211_sta_work(struct work_struct *work)
1977{
1978 struct ieee80211_sub_if_data *sdata =
1979 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1980 struct net_device *dev = sdata->dev;
1981 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1982 struct ieee80211_if_sta *ifsta;
1983 struct sk_buff *skb;
1984
1985 if (!netif_running(dev))
1986 return;
1987
1988 if (local->sta_scanning)
1989 return;
1990
1991 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1992 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1993 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1994 "(type=%d)\n", dev->name, sdata->type);
1995 return;
1996 }
1997 ifsta = &sdata->u.sta;
1998
1999 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2000 ieee80211_sta_rx_queued_mgmt(dev, skb);
2001
2002 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2003 ifsta->state != IEEE80211_ASSOCIATE &&
2004 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 2005 if (ifsta->scan_ssid_len)
2006 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2007 else
2008 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 2009 return;
2010 }
2011
2012 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2013 if (ieee80211_sta_config_auth(dev, ifsta))
2014 return;
2015 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2016 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2017 return;
2018
2019 switch (ifsta->state) {
2020 case IEEE80211_DISABLED:
2021 break;
2022 case IEEE80211_AUTHENTICATE:
2023 ieee80211_authenticate(dev, ifsta);
2024 break;
2025 case IEEE80211_ASSOCIATE:
2026 ieee80211_associate(dev, ifsta);
2027 break;
2028 case IEEE80211_ASSOCIATED:
2029 ieee80211_associated(dev, ifsta);
2030 break;
2031 case IEEE80211_IBSS_SEARCH:
2032 ieee80211_sta_find_ibss(dev, ifsta);
2033 break;
2034 case IEEE80211_IBSS_JOINED:
2035 ieee80211_sta_merge_ibss(dev, ifsta);
2036 break;
2037 default:
2038 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2039 ifsta->state);
2040 break;
2041 }
2042
2043 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2044 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2045 "mixed-cell disabled - disassociate\n", dev->name);
2046
2047 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2048 ieee80211_set_disassoc(dev, ifsta, 0);
2049 }
2050}
2051
2052
2053static void ieee80211_sta_reset_auth(struct net_device *dev,
2054 struct ieee80211_if_sta *ifsta)
2055{
2056 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2057
2058 if (local->ops->reset_tsf) {
2059 /* Reset own TSF to allow time synchronization work. */
2060 local->ops->reset_tsf(local_to_hw(local));
2061 }
2062
2063 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2064
2065
2066 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2067 ifsta->auth_alg = WLAN_AUTH_OPEN;
2068 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2069 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2070 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2071 ifsta->auth_alg = WLAN_AUTH_LEAP;
2072 else
2073 ifsta->auth_alg = WLAN_AUTH_OPEN;
2074 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2075 ifsta->auth_alg);
2076 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2077 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2078 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2079 netif_carrier_off(dev);
2080}
2081
2082
2083void ieee80211_sta_req_auth(struct net_device *dev,
2084 struct ieee80211_if_sta *ifsta)
2085{
2086 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2088
2089 if (sdata->type != IEEE80211_IF_TYPE_STA)
2090 return;
2091
d6f2da5b
JS		 2092 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2093 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2094 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2095 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2096 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2097 queue_work(local->hw.workqueue, &ifsta->work);
2098 }
2099}
2100
2101static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2102 const char *ssid, int ssid_len)
2103{
2104 int tmp, hidden_ssid;
2105
48225709
MW		 2106 if (ssid_len == ifsta->ssid_len &&
2107 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2108 return 1;
2109
d6f2da5b 2110 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2111 return 0;
2112
2113 hidden_ssid = 1;
2114 tmp = ssid_len;
2115 while (tmp--) {
2116 if (ssid[tmp] != '\0') {
2117 hidden_ssid = 0;
2118 break;
2119 }
2120 }
2121
2122 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2123 return 1;
2124
2125 if (ssid_len == 1 && ssid[0] == ' ')
2126 return 1;
2127
2128 return 0;
2129}
2130
2131static int ieee80211_sta_config_auth(struct net_device *dev,
2132 struct ieee80211_if_sta *ifsta)
2133{
2134 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2135 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2136 struct ieee80211_sta_bss *bss, *selected = NULL;
2137 int top_rssi = 0, freq;
2138
d6f2da5b
JS		 2139 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2140 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2141 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2142 ieee80211_sta_reset_auth(dev, ifsta);
2143 return 0;
2144 }
2145
2146 spin_lock_bh(&local->sta_bss_lock);
2147 freq = local->oper_channel->freq;
2148 list_for_each_entry(bss, &local->sta_bss_list, list) {
2149 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2150 continue;
2151
2152 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2153 !!sdata->default_key)
2154 continue;
2155
d6f2da5b
JS		 2156 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2157 bss->freq != freq)
f0706e82
JB		 2158 continue;
2159
d6f2da5b 2160 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2161 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2162 continue;
2163
d6f2da5b 2164 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2165 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2166 continue;
2167
2168 if (!selected || top_rssi < bss->rssi) {
2169 selected = bss;
2170 top_rssi = bss->rssi;
2171 }
2172 }
2173 if (selected)
2174 atomic_inc(&selected->users);
2175 spin_unlock_bh(&local->sta_bss_lock);
2176
2177 if (selected) {
2178 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2179 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2180 ieee80211_sta_set_ssid(dev, selected->ssid,
2181 selected->ssid_len);
2182 ieee80211_sta_set_bssid(dev, selected->bssid);
2183 ieee80211_rx_bss_put(dev, selected);
2184 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2185 ieee80211_sta_reset_auth(dev, ifsta);
2186 return 0;
2187 } else {
2188 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2189 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2190 ieee80211_sta_start_scan(dev, NULL, 0);
2191 else
2192 ieee80211_sta_start_scan(dev, ifsta->ssid,
2193 ifsta->ssid_len);
f0706e82
JB		 2194 ifsta->state = IEEE80211_AUTHENTICATE;
2195 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2196 } else
2197 ifsta->state = IEEE80211_DISABLED;
2198 }
f0706e82
JB		 2199 return -1;
2200}
2201
2202static int ieee80211_sta_join_ibss(struct net_device *dev,
2203 struct ieee80211_if_sta *ifsta,
2204 struct ieee80211_sta_bss *bss)
2205{
2206 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2207 int res, rates, i, j;
2208 struct sk_buff *skb;
2209 struct ieee80211_mgmt *mgmt;
2210 struct ieee80211_tx_control control;
2211 struct ieee80211_rate *rate;
2212 struct ieee80211_hw_mode *mode;
2213 struct rate_control_extra extra;
2214 u8 *pos;
2215 struct ieee80211_sub_if_data *sdata;
2216
2217 /* Remove possible STA entries from other IBSS networks. */
2218 sta_info_flush(local, NULL);
2219
2220 if (local->ops->reset_tsf) {
2221 /* Reset own TSF to allow time synchronization work. */
2222 local->ops->reset_tsf(local_to_hw(local));
2223 }
2224 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2225 res = ieee80211_if_config(dev);
2226 if (res)
2227 return res;
2228
2229 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2230
2231 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2232 sdata->drop_unencrypted = bss->capability &
2233 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2234
2235 res = ieee80211_set_channel(local, -1, bss->freq);
2236
2237 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2238 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2239 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2240 local->hw.conf.freq);
2241 return -1;
2242 }
2243
2244 /* Set beacon template based on scan results */
2245 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2246 do {
2247 if (!skb)
2248 break;
2249
2250 skb_reserve(skb, local->hw.extra_tx_headroom);
2251
2252 mgmt = (struct ieee80211_mgmt *)
2253 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2254 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2255 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2256 IEEE80211_STYPE_BEACON);
2257 memset(mgmt->da, 0xff, ETH_ALEN);
2258 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2259 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2260 mgmt->u.beacon.beacon_int =
2261 cpu_to_le16(local->hw.conf.beacon_int);
2262 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2263
2264 pos = skb_put(skb, 2 + ifsta->ssid_len);
2265 *pos++ = WLAN_EID_SSID;
2266 *pos++ = ifsta->ssid_len;
2267 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2268
2269 rates = bss->supp_rates_len;
2270 if (rates > 8)
2271 rates = 8;
2272 pos = skb_put(skb, 2 + rates);
2273 *pos++ = WLAN_EID_SUPP_RATES;
2274 *pos++ = rates;
2275 memcpy(pos, bss->supp_rates, rates);
2276
2277 pos = skb_put(skb, 2 + 1);
2278 *pos++ = WLAN_EID_DS_PARAMS;
2279 *pos++ = 1;
2280 *pos++ = bss->channel;
2281
2282 pos = skb_put(skb, 2 + 2);
2283 *pos++ = WLAN_EID_IBSS_PARAMS;
2284 *pos++ = 2;
2285 /* FIX: set ATIM window based on scan results */
2286 *pos++ = 0;
2287 *pos++ = 0;
2288
2289 if (bss->supp_rates_len > 8) {
2290 rates = bss->supp_rates_len - 8;
2291 pos = skb_put(skb, 2 + rates);
2292 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2293 *pos++ = rates;
2294 memcpy(pos, &bss->supp_rates[8], rates);
2295 }
2296
2297 memset(&control, 0, sizeof(control));
2298 memset(&extra, 0, sizeof(extra));
2299 extra.mode = local->oper_hw_mode;
2300 rate = rate_control_get_rate(local, dev, skb, &extra);
2301 if (!rate) {
2302 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2303 "for IBSS beacon\n", dev->name);
2304 break;
2305 }
13262ffd
JS		 2306 control.tx_rate =
2307 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2308 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
f0706e82
JB		 2309 rate->val2 : rate->val;
2310 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2311 control.power_level = local->hw.conf.power_level;
2312 control.flags |= IEEE80211_TXCTL_NO_ACK;
2313 control.retry_limit = 1;
2314
2315 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2316 if (ifsta->probe_resp) {
2317 mgmt = (struct ieee80211_mgmt *)
2318 ifsta->probe_resp->data;
2319 mgmt->frame_control =
2320 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2321 IEEE80211_STYPE_PROBE_RESP);
2322 } else {
2323 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2324 "template for IBSS\n", dev->name);
2325 }
2326
2327 if (local->ops->beacon_update &&
2328 local->ops->beacon_update(local_to_hw(local),
2329 skb, &control) == 0) {
2330 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2331 "template based on scan results\n", dev->name);
2332 skb = NULL;
2333 }
2334
2335 rates = 0;
2336 mode = local->oper_hw_mode;
2337 for (i = 0; i < bss->supp_rates_len; i++) {
2338 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 2339 for (j = 0; j < mode->num_rates; j++)
2340 if (mode->rates[j].rate == bitrate)
2341 rates |= BIT(j);
2342 }
2343 ifsta->supp_rates_bits = rates;
2344 } while (0);
2345
2346 if (skb) {
2347 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2348 "template\n", dev->name);
2349 dev_kfree_skb(skb);
2350 }
2351
2352 ifsta->state = IEEE80211_IBSS_JOINED;
2353 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2354
2355 ieee80211_rx_bss_put(dev, bss);
2356
2357 return res;
2358}
2359
2360
2361static int ieee80211_sta_create_ibss(struct net_device *dev,
2362 struct ieee80211_if_sta *ifsta)
2363{
2364 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2365 struct ieee80211_sta_bss *bss;
cffdd30d 2366 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 2367 struct ieee80211_hw_mode *mode;
2368 u8 bssid[ETH_ALEN], *pos;
2369 int i;
0795af57 2370 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2371
2372#if 0
2373 /* Easier testing, use fixed BSSID. */
2374 memset(bssid, 0xfe, ETH_ALEN);
2375#else
2376 /* Generate random, not broadcast, locally administered BSSID. Mix in
2377 * own MAC address to make sure that devices that do not have proper
2378 * random number generator get different BSSID. */
2379 get_random_bytes(bssid, ETH_ALEN);
2380 for (i = 0; i < ETH_ALEN; i++)
2381 bssid[i] ^= dev->dev_addr[i];
2382 bssid[0] &= ~0x01;
2383 bssid[0] |= 0x02;
2384#endif
2385
0795af57
JP		 2386 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2387 dev->name, print_mac(mac, bssid));
f0706e82 2388
cffdd30d
JL		 2389 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2390 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2391 if (!bss)
2392 return -ENOMEM;
2393
f0706e82
JB		 2394 mode = local->oper_hw_mode;
2395
2396 if (local->hw.conf.beacon_int == 0)
2397 local->hw.conf.beacon_int = 100;
2398 bss->beacon_int = local->hw.conf.beacon_int;
2399 bss->hw_mode = local->hw.conf.phymode;
f0706e82
JB		 2400 bss->freq = local->hw.conf.freq;
2401 bss->last_update = jiffies;
2402 bss->capability = WLAN_CAPABILITY_IBSS;
2403 if (sdata->default_key) {
2404 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2405 } else
2406 sdata->drop_unencrypted = 0;
2407 bss->supp_rates_len = mode->num_rates;
2408 pos = bss->supp_rates;
2409 for (i = 0; i < mode->num_rates; i++) {
2410 int rate = mode->rates[i].rate;
f0706e82
JB		 2411 *pos++ = (u8) (rate / 5);
2412 }
2413
2414 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2415}
2416
2417
2418static int ieee80211_sta_find_ibss(struct net_device *dev,
2419 struct ieee80211_if_sta *ifsta)
2420{
2421 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2422 struct ieee80211_sta_bss *bss;
2423 int found = 0;
2424 u8 bssid[ETH_ALEN];
2425 int active_ibss;
0795af57
JP		 2426 DECLARE_MAC_BUF(mac);
2427 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2428
2429 if (ifsta->ssid_len == 0)
2430 return -EINVAL;
2431
2432 active_ibss = ieee80211_sta_active_ibss(dev);
2433#ifdef CONFIG_MAC80211_IBSS_DEBUG
2434 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2435 dev->name, active_ibss);
2436#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2437 spin_lock_bh(&local->sta_bss_lock);
2438 list_for_each_entry(bss, &local->sta_bss_list, list) {
2439 if (ifsta->ssid_len != bss->ssid_len ||
2440 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2441 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2442 continue;
2443#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2444 printk(KERN_DEBUG " bssid=%s found\n",
2445 print_mac(mac, bss->bssid));
f0706e82
JB		 2446#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2447 memcpy(bssid, bss->bssid, ETH_ALEN);
2448 found = 1;
2449 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2450 break;
2451 }
2452 spin_unlock_bh(&local->sta_bss_lock);
2453
2454#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2455 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2456 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 2457#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2458 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
cffdd30d
JL		 2459 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2460 ifsta->ssid, ifsta->ssid_len))) {
0795af57 2461 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2462 " based on configured SSID\n",
0795af57 2463 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2464 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2465 }
2466#ifdef CONFIG_MAC80211_IBSS_DEBUG
2467 printk(KERN_DEBUG " did not try to join ibss\n");
2468#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2469
2470 /* Selected IBSS not found in current scan results - try to scan */
2471 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2472 !ieee80211_sta_active_ibss(dev)) {
2473 mod_timer(&ifsta->timer, jiffies +
2474 IEEE80211_IBSS_MERGE_INTERVAL);
2475 } else if (time_after(jiffies, local->last_scan_completed +
2476 IEEE80211_SCAN_INTERVAL)) {
2477 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2478 "join\n", dev->name);
2479 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2480 ifsta->ssid_len);
2481 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2482 int interval = IEEE80211_SCAN_INTERVAL;
2483
2484 if (time_after(jiffies, ifsta->ibss_join_req +
2485 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2486 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 2487 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2488 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 2489 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 2490 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2491 " configured channel %d (%d MHz)\n",
2492 dev->name, local->hw.conf.channel,
2493 local->hw.conf.freq);
2494 }
2495
2496 /* No IBSS found - decrease scan interval and continue
2497 * scanning. */
2498 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2499 }
2500
2501 ifsta->state = IEEE80211_IBSS_SEARCH;
2502 mod_timer(&ifsta->timer, jiffies + interval);
2503 return 0;
2504 }
2505
2506 return 0;
2507}
2508
2509
2510int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2511{
2512 struct ieee80211_sub_if_data *sdata;
2513 struct ieee80211_if_sta *ifsta;
2514 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2515
2516 if (len > IEEE80211_MAX_SSID_LEN)
2517 return -EINVAL;
2518
2519 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2520 * not defined. */
2521 if (local->ops->conf_tx) {
2522 struct ieee80211_tx_queue_params qparam;
2523 int i;
2524
2525 memset(&qparam, 0, sizeof(qparam));
2526 /* TODO: are these ok defaults for all hw_modes? */
2527 qparam.aifs = 2;
2528 qparam.cw_min =
2529 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2530 qparam.cw_max = 1023;
2531 qparam.burst_time = 0;
2532 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2533 {
2534 local->ops->conf_tx(local_to_hw(local),
2535 i + IEEE80211_TX_QUEUE_DATA0,
2536 &qparam);
2537 }
2538 /* IBSS uses different parameters for Beacon sending */
2539 qparam.cw_min++;
2540 qparam.cw_min *= 2;
2541 qparam.cw_min--;
2542 local->ops->conf_tx(local_to_hw(local),
2543 IEEE80211_TX_QUEUE_BEACON, &qparam);
2544 }
2545
2546 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2547 ifsta = &sdata->u.sta;
2548
2549 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 2550 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2551 memcpy(ifsta->ssid, ssid, len);
2552 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2553 ifsta->ssid_len = len;
2554
d6f2da5b
JS		 2555 if (len)
2556 ifsta->flags |= IEEE80211_STA_SSID_SET;
2557 else
2558 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2559 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2560 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 2561 ifsta->ibss_join_req = jiffies;
2562 ifsta->state = IEEE80211_IBSS_SEARCH;
2563 return ieee80211_sta_find_ibss(dev, ifsta);
2564 }
2565 return 0;
2566}
2567
2568
2569int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2570{
2571 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2572 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2573 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2574 *len = ifsta->ssid_len;
2575 return 0;
2576}
2577
2578
2579int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2580{
2581 struct ieee80211_sub_if_data *sdata;
2582 struct ieee80211_if_sta *ifsta;
2583 int res;
2584
2585 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2586 ifsta = &sdata->u.sta;
2587
2588 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2589 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2590 res = ieee80211_if_config(dev);
2591 if (res) {
2592 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2593 "the low-level driver\n", dev->name);
2594 return res;
2595 }
2596 }
2597
d6f2da5b
JS		 2598 if (is_valid_ether_addr(bssid))
2599 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2600 else
d6f2da5b
JS		 2601 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2602
f0706e82
JB		 2603 return 0;
2604}
2605
2606
2607static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2608 struct ieee80211_sub_if_data *sdata,
2609 int powersave)
2610{
2611 struct sk_buff *skb;
2612 struct ieee80211_hdr *nullfunc;
2613 u16 fc;
2614
2615 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2616 if (!skb) {
2617 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2618 "frame\n", sdata->dev->name);
2619 return;
2620 }
2621 skb_reserve(skb, local->hw.extra_tx_headroom);
2622
2623 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2624 memset(nullfunc, 0, 24);
2625 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2626 IEEE80211_FCTL_TODS;
2627 if (powersave)
2628 fc |= IEEE80211_FCTL_PM;
2629 nullfunc->frame_control = cpu_to_le16(fc);
2630 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2631 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2632 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2633
2634 ieee80211_sta_tx(sdata->dev, skb, 0);
2635}
2636
2637
2638void ieee80211_scan_completed(struct ieee80211_hw *hw)
2639{
2640 struct ieee80211_local *local = hw_to_local(hw);
2641 struct net_device *dev = local->scan_dev;
2642 struct ieee80211_sub_if_data *sdata;
2643 union iwreq_data wrqu;
2644
2645 local->last_scan_completed = jiffies;
2646 wmb();
2647 local->sta_scanning = 0;
2648
2649 if (ieee80211_hw_config(local))
2650 printk(KERN_DEBUG "%s: failed to restore operational"
2651 "channel after scan\n", dev->name);
2652
4150c572
JB		 2653
2654 netif_tx_lock_bh(local->mdev);
2655 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
2656 local->ops->configure_filter(local_to_hw(local),
2657 FIF_BCN_PRBRESP_PROMISC,
2658 &local->filter_flags,
2659 local->mdev->mc_count,
2660 local->mdev->mc_list);
2661
2662 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 2663
2664 memset(&wrqu, 0, sizeof(wrqu));
2665 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2666
79010420
JB		 2667 rcu_read_lock();
2668 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 2669
2670 /* No need to wake the master device. */
2671 if (sdata->dev == local->mdev)
2672 continue;
2673
f0706e82 2674 if (sdata->type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 2675 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 2676 ieee80211_send_nullfunc(local, sdata, 0);
2677 ieee80211_sta_timer((unsigned long)sdata);
2678 }
14042cbe 2679
f0706e82
JB		 2680 netif_wake_queue(sdata->dev);
2681 }
79010420 2682 rcu_read_unlock();
f0706e82
JB		 2683
2684 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2685 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2686 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 2687 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 2688 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2689 !ieee80211_sta_active_ibss(dev)))
2690 ieee80211_sta_find_ibss(dev, ifsta);
2691 }
2692}
2693EXPORT_SYMBOL(ieee80211_scan_completed);
2694
2695void ieee80211_sta_scan_work(struct work_struct *work)
2696{
2697 struct ieee80211_local *local =
2698 container_of(work, struct ieee80211_local, scan_work.work);
2699 struct net_device *dev = local->scan_dev;
2700 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2701 struct ieee80211_hw_mode *mode;
2702 struct ieee80211_channel *chan;
2703 int skip;
2704 unsigned long next_delay = 0;
2705
2706 if (!local->sta_scanning)
2707 return;
2708
2709 switch (local->scan_state) {
2710 case SCAN_SET_CHANNEL:
2711 mode = local->scan_hw_mode;
2712 if (local->scan_hw_mode->list.next == &local->modes_list &&
2713 local->scan_channel_idx >= mode->num_channels) {
2714 ieee80211_scan_completed(local_to_hw(local));
2715 return;
2716 }
2717 skip = !(local->enabled_modes & (1 << mode->mode));
2718 chan = &mode->channels[local->scan_channel_idx];
2719 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2720 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2721 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2722 (local->hw_modes & local->enabled_modes &
2723 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2724 skip = 1;
2725
2726 if (!skip) {
2727#if 0
2728 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2729 dev->name, chan->chan, chan->freq);
2730#endif
2731
2732 local->scan_channel = chan;
2733 if (ieee80211_hw_config(local)) {
2734 printk(KERN_DEBUG "%s: failed to set channel "
2735 "%d (%d MHz) for scan\n", dev->name,
2736 chan->chan, chan->freq);
2737 skip = 1;
2738 }
2739 }
2740
2741 local->scan_channel_idx++;
2742 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2743 if (local->scan_hw_mode->list.next != &local->modes_list) {
2744 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2745 struct ieee80211_hw_mode,
2746 list);
2747 local->scan_channel_idx = 0;
2748 }
2749 }
2750
2751 if (skip)
2752 break;
2753
2754 next_delay = IEEE80211_PROBE_DELAY +
2755 usecs_to_jiffies(local->hw.channel_change_time);
2756 local->scan_state = SCAN_SEND_PROBE;
2757 break;
2758 case SCAN_SEND_PROBE:
2759 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2760 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2761 local->scan_ssid_len);
2762 next_delay = IEEE80211_CHANNEL_TIME;
2763 } else
2764 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2765 local->scan_state = SCAN_SET_CHANNEL;
2766 break;
2767 }
2768
2769 if (local->sta_scanning)
2770 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2771 next_delay);
2772}
2773
2774
2775static int ieee80211_sta_start_scan(struct net_device *dev,
2776 u8 *ssid, size_t ssid_len)
2777{
2778 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2779 struct ieee80211_sub_if_data *sdata;
2780
2781 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2782 return -EINVAL;
2783
2784 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2785 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2786 * BSSID: MACAddress
2787 * SSID
2788 * ScanType: ACTIVE, PASSIVE
2789 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2790 * a Probe frame during active scanning
2791 * ChannelList
2792 * MinChannelTime (>= ProbeDelay), in TU
2793 * MaxChannelTime: (>= MinChannelTime), in TU
2794 */
2795
2796 /* MLME-SCAN.confirm
2797 * BSSDescriptionSet
2798 * ResultCode: SUCCESS, INVALID_PARAMETERS
2799 */
2800
2801 if (local->sta_scanning) {
2802 if (local->scan_dev == dev)
2803 return 0;
2804 return -EBUSY;
2805 }
2806
2807 if (local->ops->hw_scan) {
2808 int rc = local->ops->hw_scan(local_to_hw(local),
2809 ssid, ssid_len);
2810 if (!rc) {
2811 local->sta_scanning = 1;
2812 local->scan_dev = dev;
2813 }
2814 return rc;
2815 }
2816
2817 local->sta_scanning = 1;
2818
79010420
JB		 2819 rcu_read_lock();
2820 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 2821
2822 /* Don't stop the master interface, otherwise we can't transmit
2823 * probes! */
2824 if (sdata->dev == local->mdev)
2825 continue;
2826
f0706e82
JB		 2827 netif_stop_queue(sdata->dev);
2828 if (sdata->type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 2829 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2830 ieee80211_send_nullfunc(local, sdata, 1);
2831 }
79010420 2832 rcu_read_unlock();
f0706e82
JB		 2833
2834 if (ssid) {
2835 local->scan_ssid_len = ssid_len;
2836 memcpy(local->scan_ssid, ssid, ssid_len);
2837 } else
2838 local->scan_ssid_len = 0;
2839 local->scan_state = SCAN_SET_CHANNEL;
2840 local->scan_hw_mode = list_entry(local->modes_list.next,
2841 struct ieee80211_hw_mode,
2842 list);
2843 local->scan_channel_idx = 0;
2844 local->scan_dev = dev;
2845
4150c572
JB		 2846 netif_tx_lock_bh(local->mdev);
2847 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
2848 local->ops->configure_filter(local_to_hw(local),
2849 FIF_BCN_PRBRESP_PROMISC,
2850 &local->filter_flags,
2851 local->mdev->mc_count,
2852 local->mdev->mc_list);
2853 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 2854
2855 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2856 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2857 IEEE80211_CHANNEL_TIME);
2858
2859 return 0;
2860}
2861
2862
2863int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2864{
2865 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2866 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2867 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2868
2869 if (sdata->type != IEEE80211_IF_TYPE_STA)
2870 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2871
2872 if (local->sta_scanning) {
2873 if (local->scan_dev == dev)
2874 return 0;
2875 return -EBUSY;
2876 }
2877
a0af5f14
HS		 2878 ifsta->scan_ssid_len = ssid_len;
2879 if (ssid_len)
2880 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 2881 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2882 queue_work(local->hw.workqueue, &ifsta->work);
2883 return 0;
2884}
2885
2886static char *
2887ieee80211_sta_scan_result(struct net_device *dev,
2888 struct ieee80211_sta_bss *bss,
2889 char *current_ev, char *end_buf)
2890{
2891 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2892 struct iw_event iwe;
2893
2894 if (time_after(jiffies,
2895 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2896 return current_ev;
2897
2898 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2899 return current_ev;
2900
2901 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2902 !bss->wpa_ie && !bss->rsn_ie)
2903 return current_ev;
2904
2905 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2906 (local->scan_ssid_len != bss->ssid_len ||
2907 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2908 return current_ev;
2909
2910 memset(&iwe, 0, sizeof(iwe));
2911 iwe.cmd = SIOCGIWAP;
2912 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2913 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2914 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2915 IW_EV_ADDR_LEN);
2916
2917 memset(&iwe, 0, sizeof(iwe));
2918 iwe.cmd = SIOCGIWESSID;
2919 iwe.u.data.length = bss->ssid_len;
2920 iwe.u.data.flags = 1;
2921 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2922 bss->ssid);
2923
2924 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2925 memset(&iwe, 0, sizeof(iwe));
2926 iwe.cmd = SIOCGIWMODE;
2927 if (bss->capability & WLAN_CAPABILITY_ESS)
2928 iwe.u.mode = IW_MODE_MASTER;
2929 else
2930 iwe.u.mode = IW_MODE_ADHOC;
2931 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2932 IW_EV_UINT_LEN);
2933 }
2934
2935 memset(&iwe, 0, sizeof(iwe));
2936 iwe.cmd = SIOCGIWFREQ;
2937 iwe.u.freq.m = bss->channel;
2938 iwe.u.freq.e = 0;
2939 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2940 IW_EV_FREQ_LEN);
2941 iwe.u.freq.m = bss->freq * 100000;
2942 iwe.u.freq.e = 1;
2943 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2944 IW_EV_FREQ_LEN);
2945
2946 memset(&iwe, 0, sizeof(iwe));
2947 iwe.cmd = IWEVQUAL;
2948 iwe.u.qual.qual = bss->signal;
2949 iwe.u.qual.level = bss->rssi;
2950 iwe.u.qual.noise = bss->noise;
2951 iwe.u.qual.updated = local->wstats_flags;
2952 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2953 IW_EV_QUAL_LEN);
2954
2955 memset(&iwe, 0, sizeof(iwe));
2956 iwe.cmd = SIOCGIWENCODE;
2957 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2958 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2959 else
2960 iwe.u.data.flags = IW_ENCODE_DISABLED;
2961 iwe.u.data.length = 0;
2962 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2963
2964 if (bss && bss->wpa_ie) {
2965 memset(&iwe, 0, sizeof(iwe));
2966 iwe.cmd = IWEVGENIE;
2967 iwe.u.data.length = bss->wpa_ie_len;
2968 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2969 bss->wpa_ie);
2970 }
2971
2972 if (bss && bss->rsn_ie) {
2973 memset(&iwe, 0, sizeof(iwe));
2974 iwe.cmd = IWEVGENIE;
2975 iwe.u.data.length = bss->rsn_ie_len;
2976 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2977 bss->rsn_ie);
2978 }
2979
2980 if (bss && bss->supp_rates_len > 0) {
2981 /* display all supported rates in readable format */
2982 char *p = current_ev + IW_EV_LCP_LEN;
2983 int i;
2984
2985 memset(&iwe, 0, sizeof(iwe));
2986 iwe.cmd = SIOCGIWRATE;
2987 /* Those two flags are ignored... */
2988 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2989
2990 for (i = 0; i < bss->supp_rates_len; i++) {
2991 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2992 0x7f) * 500000);
2993 p = iwe_stream_add_value(current_ev, p,
2994 end_buf, &iwe, IW_EV_PARAM_LEN);
2995 }
2996 current_ev = p;
2997 }
2998
2999 if (bss) {
3000 char *buf;
3001 buf = kmalloc(30, GFP_ATOMIC);
3002 if (buf) {
3003 memset(&iwe, 0, sizeof(iwe));
3004 iwe.cmd = IWEVCUSTOM;
3005 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3006 iwe.u.data.length = strlen(buf);
3007 current_ev = iwe_stream_add_point(current_ev, end_buf,
3008 &iwe, buf);
3009 kfree(buf);
3010 }
3011 }
3012
3013 do {
3014 char *buf;
3015
3016 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
3017 break;
3018
3019 buf = kmalloc(100, GFP_ATOMIC);
3020 if (!buf)
3021 break;
3022
3023 memset(&iwe, 0, sizeof(iwe));
3024 iwe.cmd = IWEVCUSTOM;
3025 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3026 iwe.u.data.length = strlen(buf);
3027 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3028 buf);
3029
3030 memset(&iwe, 0, sizeof(iwe));
3031 iwe.cmd = IWEVCUSTOM;
3032 sprintf(buf, "capab=0x%04x", bss->capability);
3033 iwe.u.data.length = strlen(buf);
3034 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3035 buf);
3036
3037 kfree(buf);
3038 break;
3039 } while (0);
3040
3041 return current_ev;
3042}
3043
3044
3045int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3046{
3047 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3048 char *current_ev = buf;
3049 char *end_buf = buf + len;
3050 struct ieee80211_sta_bss *bss;
3051
3052 spin_lock_bh(&local->sta_bss_lock);
3053 list_for_each_entry(bss, &local->sta_bss_list, list) {
3054 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3055 spin_unlock_bh(&local->sta_bss_lock);
3056 return -E2BIG;
3057 }
3058 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3059 end_buf);
3060 }
3061 spin_unlock_bh(&local->sta_bss_lock);
3062 return current_ev - buf;
3063}
3064
3065
3066int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3067{
3068 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3069 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3070 kfree(ifsta->extra_ie);
3071 if (len == 0) {
3072 ifsta->extra_ie = NULL;
3073 ifsta->extra_ie_len = 0;
3074 return 0;
3075 }
3076 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3077 if (!ifsta->extra_ie) {
3078 ifsta->extra_ie_len = 0;
3079 return -ENOMEM;
3080 }
3081 memcpy(ifsta->extra_ie, ie, len);
3082 ifsta->extra_ie_len = len;
3083 return 0;
3084}
3085
3086
3087struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3088 struct sk_buff *skb, u8 *bssid,
3089 u8 *addr)
3090{
3091 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3092 struct sta_info *sta;
91fa558b 3093 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3094 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3095
3096 /* TODO: Could consider removing the least recently used entry and
3097 * allow new one to be added. */
3098 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3099 if (net_ratelimit()) {
3100 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3101 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3102 }
3103 return NULL;
3104 }
3105
0795af57 3106 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3107 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3108
3109 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3110 if (!sta)
3111 return NULL;
3112
3113 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3114
3115 rate_control_rate_init(sta, local);
3116
3117 return sta; /* caller will call sta_info_put() */
3118}
3119
3120
3121int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3122{
3123 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3124 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3125
3126 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3127 dev->name, reason);
3128
3129 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3130 sdata->type != IEEE80211_IF_TYPE_IBSS)
3131 return -EINVAL;
3132
3133 ieee80211_send_deauth(dev, ifsta, reason);
3134 ieee80211_set_disassoc(dev, ifsta, 1);
3135 return 0;
3136}
3137
3138
3139int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3140{
3141 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3142 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3143
3144 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3145 dev->name, reason);
3146
3147 if (sdata->type != IEEE80211_IF_TYPE_STA)
3148 return -EINVAL;
3149
d6f2da5b 3150 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3151 return -1;
3152
3153 ieee80211_send_disassoc(dev, ifsta, reason);
3154 ieee80211_set_disassoc(dev, ifsta, 0);
3155 return 0;
3156}
Linux 6.x block layer and io_uring tree(s)