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[MAC80211]: make userspace-mlme a per-interface setting
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
15 * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
16 * order BSS list by RSSI(?) ("quality of AP")
17 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
18 * SSID)
19 */
5b323edb 20#include <linux/delay.h>
f0706e82
JB		 21#include <linux/if_ether.h>
22#include <linux/skbuff.h>
23#include <linux/netdevice.h>
24#include <linux/if_arp.h>
25#include <linux/wireless.h>
26#include <linux/random.h>
27#include <linux/etherdevice.h>
f0706e82
JB		 28#include <net/iw_handler.h>
29#include <asm/types.h>
f0706e82
JB		 30
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
33#include "ieee80211_rate.h"
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 *
63ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
64static void ieee80211_rx_bss_put(struct net_device *dev,
65 struct ieee80211_sta_bss *bss);
66static int ieee80211_sta_find_ibss(struct net_device *dev,
67 struct ieee80211_if_sta *ifsta);
68static int ieee80211_sta_wep_configured(struct net_device *dev);
69static int ieee80211_sta_start_scan(struct net_device *dev,
70 u8 *ssid, size_t ssid_len);
71static int ieee80211_sta_config_auth(struct net_device *dev,
72 struct ieee80211_if_sta *ifsta);
73
74
75/* Parsed Information Elements */
76struct ieee802_11_elems {
5558235c 77 /* pointers to IEs */
f0706e82 78 u8 *ssid;
f0706e82 79 u8 *supp_rates;
f0706e82 80 u8 *fh_params;
f0706e82 81 u8 *ds_params;
f0706e82 82 u8 *cf_params;
f0706e82 83 u8 *tim;
f0706e82 84 u8 *ibss_params;
f0706e82 85 u8 *challenge;
f0706e82 86 u8 *wpa;
f0706e82 87 u8 *rsn;
f0706e82 88 u8 *erp_info;
f0706e82 89 u8 *ext_supp_rates;
f0706e82 90 u8 *wmm_info;
f0706e82 91 u8 *wmm_param;
5558235c
JB		 92
93 /* length of them, respectively */
94 u8 ssid_len;
95 u8 supp_rates_len;
96 u8 fh_params_len;
97 u8 ds_params_len;
98 u8 cf_params_len;
99 u8 tim_len;
100 u8 ibss_params_len;
101 u8 challenge_len;
102 u8 wpa_len;
103 u8 rsn_len;
104 u8 erp_info_len;
105 u8 ext_supp_rates_len;
106 u8 wmm_info_len;
f0706e82
JB		 107 u8 wmm_param_len;
108};
109
c095df53 110enum ParseRes { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 };
f0706e82 111
c095df53
JB		 112static enum ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
113 struct ieee802_11_elems *elems)
f0706e82
JB		 114{
115 size_t left = len;
116 u8 *pos = start;
117 int unknown = 0;
118
119 memset(elems, 0, sizeof(*elems));
120
121 while (left >= 2) {
122 u8 id, elen;
123
124 id = *pos++;
125 elen = *pos++;
126 left -= 2;
127
128 if (elen > left) {
129#if 0
130 if (net_ratelimit())
131 printk(KERN_DEBUG "IEEE 802.11 element parse "
132 "failed (id=%d elen=%d left=%d)\n",
133 id, elen, left);
134#endif
135 return ParseFailed;
136 }
137
138 switch (id) {
139 case WLAN_EID_SSID:
140 elems->ssid = pos;
141 elems->ssid_len = elen;
142 break;
143 case WLAN_EID_SUPP_RATES:
144 elems->supp_rates = pos;
145 elems->supp_rates_len = elen;
146 break;
147 case WLAN_EID_FH_PARAMS:
148 elems->fh_params = pos;
149 elems->fh_params_len = elen;
150 break;
151 case WLAN_EID_DS_PARAMS:
152 elems->ds_params = pos;
153 elems->ds_params_len = elen;
154 break;
155 case WLAN_EID_CF_PARAMS:
156 elems->cf_params = pos;
157 elems->cf_params_len = elen;
158 break;
159 case WLAN_EID_TIM:
160 elems->tim = pos;
161 elems->tim_len = elen;
162 break;
163 case WLAN_EID_IBSS_PARAMS:
164 elems->ibss_params = pos;
165 elems->ibss_params_len = elen;
166 break;
167 case WLAN_EID_CHALLENGE:
168 elems->challenge = pos;
169 elems->challenge_len = elen;
170 break;
171 case WLAN_EID_WPA:
172 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
173 pos[2] == 0xf2) {
174 /* Microsoft OUI (00:50:F2) */
175 if (pos[3] == 1) {
176 /* OUI Type 1 - WPA IE */
177 elems->wpa = pos;
178 elems->wpa_len = elen;
179 } else if (elen >= 5 && pos[3] == 2) {
180 if (pos[4] == 0) {
181 elems->wmm_info = pos;
182 elems->wmm_info_len = elen;
183 } else if (pos[4] == 1) {
184 elems->wmm_param = pos;
185 elems->wmm_param_len = elen;
186 }
187 }
188 }
189 break;
190 case WLAN_EID_RSN:
191 elems->rsn = pos;
192 elems->rsn_len = elen;
193 break;
194 case WLAN_EID_ERP_INFO:
195 elems->erp_info = pos;
196 elems->erp_info_len = elen;
197 break;
198 case WLAN_EID_EXT_SUPP_RATES:
199 elems->ext_supp_rates = pos;
200 elems->ext_supp_rates_len = elen;
201 break;
202 default:
203#if 0
204 printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
205 "unknown element (id=%d elen=%d)\n",
206 id, elen);
207#endif
208 unknown++;
209 break;
210 }
211
212 left -= elen;
213 pos += elen;
214 }
215
216 /* Do not trigger error if left == 1 as Apple Airport base stations
217 * send AssocResps that are one spurious byte too long. */
218
219 return unknown ? ParseUnknown : ParseOK;
220}
221
222
223
224
225static int ecw2cw(int ecw)
226{
227 int cw = 1;
228 while (ecw > 0) {
229 cw <<= 1;
230 ecw--;
231 }
232 return cw - 1;
233}
234
f0706e82
JB		 235static void ieee80211_sta_wmm_params(struct net_device *dev,
236 struct ieee80211_if_sta *ifsta,
237 u8 *wmm_param, size_t wmm_param_len)
238{
239 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
240 struct ieee80211_tx_queue_params params;
241 size_t left;
242 int count;
243 u8 *pos;
244
245 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
246 return;
247 count = wmm_param[6] & 0x0f;
248 if (count == ifsta->wmm_last_param_set)
249 return;
250 ifsta->wmm_last_param_set = count;
251
252 pos = wmm_param + 8;
253 left = wmm_param_len - 8;
254
255 memset(&params, 0, sizeof(params));
256
257 if (!local->ops->conf_tx)
258 return;
259
260 local->wmm_acm = 0;
261 for (; left >= 4; left -= 4, pos += 4) {
262 int aci = (pos[0] >> 5) & 0x03;
263 int acm = (pos[0] >> 4) & 0x01;
264 int queue;
265
266 switch (aci) {
267 case 1:
268 queue = IEEE80211_TX_QUEUE_DATA3;
269 if (acm) {
270 local->wmm_acm |= BIT(0) | BIT(3);
271 }
272 break;
273 case 2:
274 queue = IEEE80211_TX_QUEUE_DATA1;
275 if (acm) {
276 local->wmm_acm |= BIT(4) | BIT(5);
277 }
278 break;
279 case 3:
280 queue = IEEE80211_TX_QUEUE_DATA0;
281 if (acm) {
282 local->wmm_acm |= BIT(6) | BIT(7);
283 }
284 break;
285 case 0:
286 default:
287 queue = IEEE80211_TX_QUEUE_DATA2;
288 if (acm) {
289 local->wmm_acm |= BIT(1) | BIT(2);
290 }
291 break;
292 }
293
294 params.aifs = pos[0] & 0x0f;
295 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
296 params.cw_min = ecw2cw(pos[1] & 0x0f);
297 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
298 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
299 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
300 "cWmin=%d cWmax=%d burst=%d\n",
301 dev->name, queue, aci, acm, params.aifs, params.cw_min,
302 params.cw_max, params.burst_time);
303 /* TODO: handle ACM (block TX, fallback to next lowest allowed
304 * AC for now) */
305 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
306 printk(KERN_DEBUG "%s: failed to set TX queue "
307 "parameters for queue %d\n", dev->name, queue);
308 }
309 }
310}
311
312
5628221c
DD		 313static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
314{
5628221c
DD		 315 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
316 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
317 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 318 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 319 u8 changes = 0;
0795af57 320 DECLARE_MAC_BUF(mac);
5628221c 321
13262ffd 322 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
5628221c
DD		 323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 325 "%s)\n",
5628221c
DD		 326 dev->name,
327 use_protection ? "enabled" : "disabled",
0795af57 328 print_mac(mac, ifsta->bssid));
5628221c 329 }
13262ffd
JS		 330 if (use_protection)
331 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
332 else
333 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
d9430a32 334 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 335 }
7e9ed188 336
13262ffd 337 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
7e9ed188
DD		 338 if (net_ratelimit()) {
339 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 340 " (BSSID=%s)\n",
7e9ed188
DD		 341 dev->name,
342 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
343 "short" : "long",
0795af57 344 print_mac(mac, ifsta->bssid));
7e9ed188 345 }
13262ffd
JS		 346 if (preamble_mode)
347 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
348 else
349 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
d9430a32 350 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 351 }
d9430a32
DD		 352
353 if (changes)
354 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 355}
356
357
f0706e82
JB		 358static void ieee80211_sta_send_associnfo(struct net_device *dev,
359 struct ieee80211_if_sta *ifsta)
360{
361 char *buf;
362 size_t len;
363 int i;
364 union iwreq_data wrqu;
365
366 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
367 return;
368
369 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 370 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 371 if (!buf)
372 return;
373
374 len = sprintf(buf, "ASSOCINFO(");
375 if (ifsta->assocreq_ies) {
376 len += sprintf(buf + len, "ReqIEs=");
377 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
378 len += sprintf(buf + len, "%02x",
379 ifsta->assocreq_ies[i]);
380 }
381 }
382 if (ifsta->assocresp_ies) {
383 if (ifsta->assocreq_ies)
384 len += sprintf(buf + len, " ");
385 len += sprintf(buf + len, "RespIEs=");
386 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
387 len += sprintf(buf + len, "%02x",
388 ifsta->assocresp_ies[i]);
389 }
390 }
391 len += sprintf(buf + len, ")");
392
393 if (len > IW_CUSTOM_MAX) {
394 len = sprintf(buf, "ASSOCRESPIE=");
395 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
396 len += sprintf(buf + len, "%02x",
397 ifsta->assocresp_ies[i]);
398 }
399 }
400
401 memset(&wrqu, 0, sizeof(wrqu));
402 wrqu.data.length = len;
403 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
404
405 kfree(buf);
406}
407
408
409static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b
JS		 410 struct ieee80211_if_sta *ifsta,
411 unsigned int assoc)
f0706e82
JB		 412{
413 union iwreq_data wrqu;
414
d6f2da5b 415 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
f0706e82
JB		 416 return;
417
f0706e82
JB		 418 if (assoc) {
419 struct ieee80211_sub_if_data *sdata;
5628221c 420 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 421
422 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
423
f0706e82
JB		 424 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
425 if (sdata->type != IEEE80211_IF_TYPE_STA)
426 return;
5628221c
DD		 427
428 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
429 if (bss) {
430 if (bss->has_erp_value)
431 ieee80211_handle_erp_ie(dev, bss->erp_value);
432 ieee80211_rx_bss_put(dev, bss);
433 }
434
f0706e82 435 netif_carrier_on(dev);
d6f2da5b 436 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 437 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
438 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
439 ieee80211_sta_send_associnfo(dev, ifsta);
440 } else {
d6f2da5b
JS		 441 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
442
f0706e82 443 netif_carrier_off(dev);
d9430a32 444 ieee80211_reset_erp_info(dev);
f0706e82
JB		 445 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
446 }
447 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
448 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
449 ifsta->last_probe = jiffies;
450}
451
452static void ieee80211_set_disassoc(struct net_device *dev,
453 struct ieee80211_if_sta *ifsta, int deauth)
454{
455 if (deauth)
456 ifsta->auth_tries = 0;
457 ifsta->assoc_tries = 0;
458 ieee80211_set_associated(dev, ifsta, 0);
459}
460
461static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
462 int encrypt)
463{
464 struct ieee80211_sub_if_data *sdata;
465 struct ieee80211_tx_packet_data *pkt_data;
466
467 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
468 skb->dev = sdata->local->mdev;
469 skb_set_mac_header(skb, 0);
470 skb_set_network_header(skb, 0);
471 skb_set_transport_header(skb, 0);
472
473 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
474 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
475 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 476 if (!encrypt)
477 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 478
479 dev_queue_xmit(skb);
480}
481
482
483static void ieee80211_send_auth(struct net_device *dev,
484 struct ieee80211_if_sta *ifsta,
485 int transaction, u8 *extra, size_t extra_len,
486 int encrypt)
487{
488 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
489 struct sk_buff *skb;
490 struct ieee80211_mgmt *mgmt;
491
492 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
493 sizeof(*mgmt) + 6 + extra_len);
494 if (!skb) {
495 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
496 "frame\n", dev->name);
497 return;
498 }
499 skb_reserve(skb, local->hw.extra_tx_headroom);
500
501 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
502 memset(mgmt, 0, 24 + 6);
503 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
504 IEEE80211_STYPE_AUTH);
505 if (encrypt)
506 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
507 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
508 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
509 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
510 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
511 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
512 ifsta->auth_transaction = transaction + 1;
513 mgmt->u.auth.status_code = cpu_to_le16(0);
514 if (extra)
515 memcpy(skb_put(skb, extra_len), extra, extra_len);
516
517 ieee80211_sta_tx(dev, skb, encrypt);
518}
519
520
521static void ieee80211_authenticate(struct net_device *dev,
522 struct ieee80211_if_sta *ifsta)
523{
0795af57
JP		 524 DECLARE_MAC_BUF(mac);
525
f0706e82
JB		 526 ifsta->auth_tries++;
527 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 528 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 529 " timed out\n",
0795af57 530 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 531 ifsta->state = IEEE80211_DISABLED;
532 return;
533 }
534
535 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 536 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
537 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 538
539 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
540
541 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
542}
543
544
545static void ieee80211_send_assoc(struct net_device *dev,
546 struct ieee80211_if_sta *ifsta)
547{
548 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
549 struct ieee80211_hw_mode *mode;
550 struct sk_buff *skb;
551 struct ieee80211_mgmt *mgmt;
552 u8 *pos, *ies;
553 int i, len;
554 u16 capab;
555 struct ieee80211_sta_bss *bss;
556 int wmm = 0;
557
558 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
559 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
560 ifsta->ssid_len);
561 if (!skb) {
562 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
563 "frame\n", dev->name);
564 return;
565 }
566 skb_reserve(skb, local->hw.extra_tx_headroom);
567
568 mode = local->oper_hw_mode;
569 capab = ifsta->capab;
570 if (mode->mode == MODE_IEEE80211G) {
571 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
572 WLAN_CAPABILITY_SHORT_PREAMBLE;
573 }
574 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
575 if (bss) {
576 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
577 capab |= WLAN_CAPABILITY_PRIVACY;
578 if (bss->wmm_ie) {
579 wmm = 1;
580 }
581 ieee80211_rx_bss_put(dev, bss);
582 }
583
584 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
585 memset(mgmt, 0, 24);
586 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
587 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
588 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
589
d6f2da5b 590 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 591 skb_put(skb, 10);
592 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
593 IEEE80211_STYPE_REASSOC_REQ);
594 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
595 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
596 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
597 ETH_ALEN);
598 } else {
599 skb_put(skb, 4);
600 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
601 IEEE80211_STYPE_ASSOC_REQ);
602 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
603 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
604 }
605
606 /* SSID */
607 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
608 *pos++ = WLAN_EID_SSID;
609 *pos++ = ifsta->ssid_len;
610 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
611
612 len = mode->num_rates;
613 if (len > 8)
614 len = 8;
615 pos = skb_put(skb, len + 2);
616 *pos++ = WLAN_EID_SUPP_RATES;
617 *pos++ = len;
618 for (i = 0; i < len; i++) {
619 int rate = mode->rates[i].rate;
f0706e82
JB		 620 *pos++ = (u8) (rate / 5);
621 }
622
623 if (mode->num_rates > len) {
624 pos = skb_put(skb, mode->num_rates - len + 2);
625 *pos++ = WLAN_EID_EXT_SUPP_RATES;
626 *pos++ = mode->num_rates - len;
627 for (i = len; i < mode->num_rates; i++) {
628 int rate = mode->rates[i].rate;
f0706e82
JB		 629 *pos++ = (u8) (rate / 5);
630 }
631 }
632
633 if (ifsta->extra_ie) {
634 pos = skb_put(skb, ifsta->extra_ie_len);
635 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
636 }
637
d6f2da5b 638 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 639 pos = skb_put(skb, 9);
640 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
641 *pos++ = 7; /* len */
642 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
643 *pos++ = 0x50;
644 *pos++ = 0xf2;
645 *pos++ = 2; /* WME */
646 *pos++ = 0; /* WME info */
647 *pos++ = 1; /* WME ver */
648 *pos++ = 0;
649 }
650
651 kfree(ifsta->assocreq_ies);
652 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 653 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 654 if (ifsta->assocreq_ies)
655 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
656
657 ieee80211_sta_tx(dev, skb, 0);
658}
659
660
661static void ieee80211_send_deauth(struct net_device *dev,
662 struct ieee80211_if_sta *ifsta, u16 reason)
663{
664 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
665 struct sk_buff *skb;
666 struct ieee80211_mgmt *mgmt;
667
668 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
669 if (!skb) {
670 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
671 "frame\n", dev->name);
672 return;
673 }
674 skb_reserve(skb, local->hw.extra_tx_headroom);
675
676 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
677 memset(mgmt, 0, 24);
678 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
679 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
680 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
681 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
682 IEEE80211_STYPE_DEAUTH);
683 skb_put(skb, 2);
684 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
685
686 ieee80211_sta_tx(dev, skb, 0);
687}
688
689
690static void ieee80211_send_disassoc(struct net_device *dev,
691 struct ieee80211_if_sta *ifsta, u16 reason)
692{
693 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
694 struct sk_buff *skb;
695 struct ieee80211_mgmt *mgmt;
696
697 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
698 if (!skb) {
699 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
700 "frame\n", dev->name);
701 return;
702 }
703 skb_reserve(skb, local->hw.extra_tx_headroom);
704
705 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
706 memset(mgmt, 0, 24);
707 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
708 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
709 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
710 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
711 IEEE80211_STYPE_DISASSOC);
712 skb_put(skb, 2);
713 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
714
715 ieee80211_sta_tx(dev, skb, 0);
716}
717
718
719static int ieee80211_privacy_mismatch(struct net_device *dev,
720 struct ieee80211_if_sta *ifsta)
721{
722 struct ieee80211_sta_bss *bss;
723 int res = 0;
724
d6f2da5b
JS		 725 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL) ||
726 ifsta->key_management_enabled)
f0706e82
JB		 727 return 0;
728
729 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
730 if (!bss)
731 return 0;
732
733 if (ieee80211_sta_wep_configured(dev) !=
734 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
735 res = 1;
736
737 ieee80211_rx_bss_put(dev, bss);
738
739 return res;
740}
741
742
743static void ieee80211_associate(struct net_device *dev,
744 struct ieee80211_if_sta *ifsta)
745{
0795af57
JP		 746 DECLARE_MAC_BUF(mac);
747
f0706e82
JB		 748 ifsta->assoc_tries++;
749 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 750 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 751 " timed out\n",
0795af57 752 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 753 ifsta->state = IEEE80211_DISABLED;
754 return;
755 }
756
757 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 758 printk(KERN_DEBUG "%s: associate with AP %s\n",
759 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 760 if (ieee80211_privacy_mismatch(dev, ifsta)) {
761 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
762 "mixed-cell disabled - abort association\n", dev->name);
763 ifsta->state = IEEE80211_DISABLED;
764 return;
765 }
766
767 ieee80211_send_assoc(dev, ifsta);
768
769 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
770}
771
772
773static void ieee80211_associated(struct net_device *dev,
774 struct ieee80211_if_sta *ifsta)
775{
776 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
777 struct sta_info *sta;
778 int disassoc;
0795af57 779 DECLARE_MAC_BUF(mac);
f0706e82
JB		 780
781 /* TODO: start monitoring current AP signal quality and number of
782 * missed beacons. Scan other channels every now and then and search
783 * for better APs. */
784 /* TODO: remove expired BSSes */
785
786 ifsta->state = IEEE80211_ASSOCIATED;
787
788 sta = sta_info_get(local, ifsta->bssid);
789 if (!sta) {
0795af57
JP		 790 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
791 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 792 disassoc = 1;
793 } else {
794 disassoc = 0;
795 if (time_after(jiffies,
796 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 797 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 798 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 799 "current AP %s - assume out of "
f0706e82 800 "range\n",
0795af57 801 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 802 disassoc = 1;
be8755e1 803 sta_info_free(sta);
d6f2da5b 804 } else
f0706e82
JB		 805 ieee80211_send_probe_req(dev, ifsta->bssid,
806 local->scan_ssid,
807 local->scan_ssid_len);
d6f2da5b 808 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 809 } else {
d6f2da5b 810 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 811 if (time_after(jiffies, ifsta->last_probe +
812 IEEE80211_PROBE_INTERVAL)) {
813 ifsta->last_probe = jiffies;
814 ieee80211_send_probe_req(dev, ifsta->bssid,
815 ifsta->ssid,
816 ifsta->ssid_len);
817 }
818 }
819 sta_info_put(sta);
820 }
821 if (disassoc) {
822 union iwreq_data wrqu;
823 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
824 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
825 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
826 mod_timer(&ifsta->timer, jiffies +
827 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
828 } else {
829 mod_timer(&ifsta->timer, jiffies +
830 IEEE80211_MONITORING_INTERVAL);
831 }
832}
833
834
835static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
836 u8 *ssid, size_t ssid_len)
837{
838 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
839 struct ieee80211_hw_mode *mode;
840 struct sk_buff *skb;
841 struct ieee80211_mgmt *mgmt;
842 u8 *pos, *supp_rates, *esupp_rates = NULL;
843 int i;
844
845 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
846 if (!skb) {
847 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
848 "request\n", dev->name);
849 return;
850 }
851 skb_reserve(skb, local->hw.extra_tx_headroom);
852
853 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
854 memset(mgmt, 0, 24);
855 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
856 IEEE80211_STYPE_PROBE_REQ);
857 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
858 if (dst) {
859 memcpy(mgmt->da, dst, ETH_ALEN);
860 memcpy(mgmt->bssid, dst, ETH_ALEN);
861 } else {
862 memset(mgmt->da, 0xff, ETH_ALEN);
863 memset(mgmt->bssid, 0xff, ETH_ALEN);
864 }
865 pos = skb_put(skb, 2 + ssid_len);
866 *pos++ = WLAN_EID_SSID;
867 *pos++ = ssid_len;
868 memcpy(pos, ssid, ssid_len);
869
870 supp_rates = skb_put(skb, 2);
871 supp_rates[0] = WLAN_EID_SUPP_RATES;
872 supp_rates[1] = 0;
873 mode = local->oper_hw_mode;
874 for (i = 0; i < mode->num_rates; i++) {
875 struct ieee80211_rate *rate = &mode->rates[i];
876 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
877 continue;
878 if (esupp_rates) {
879 pos = skb_put(skb, 1);
880 esupp_rates[1]++;
881 } else if (supp_rates[1] == 8) {
882 esupp_rates = skb_put(skb, 3);
883 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
884 esupp_rates[1] = 1;
885 pos = &esupp_rates[2];
886 } else {
887 pos = skb_put(skb, 1);
888 supp_rates[1]++;
889 }
b708e610 890 *pos = rate->rate / 5;
f0706e82
JB		 891 }
892
893 ieee80211_sta_tx(dev, skb, 0);
894}
895
896
897static int ieee80211_sta_wep_configured(struct net_device *dev)
898{
899 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
900 if (!sdata || !sdata->default_key ||
8f20fc24 901 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 902 return 0;
903 return 1;
904}
905
906
907static void ieee80211_auth_completed(struct net_device *dev,
908 struct ieee80211_if_sta *ifsta)
909{
910 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 911 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 912 ieee80211_associate(dev, ifsta);
913}
914
915
916static void ieee80211_auth_challenge(struct net_device *dev,
917 struct ieee80211_if_sta *ifsta,
918 struct ieee80211_mgmt *mgmt,
919 size_t len)
920{
921 u8 *pos;
922 struct ieee802_11_elems elems;
923
924 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
925 pos = mgmt->u.auth.variable;
926 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
927 == ParseFailed) {
928 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
929 dev->name);
930 return;
931 }
932 if (!elems.challenge) {
933 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
934 "frame\n", dev->name);
935 return;
936 }
937 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
938 elems.challenge_len + 2, 1);
939}
940
941
942static void ieee80211_rx_mgmt_auth(struct net_device *dev,
943 struct ieee80211_if_sta *ifsta,
944 struct ieee80211_mgmt *mgmt,
945 size_t len)
946{
947 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
948 u16 auth_alg, auth_transaction, status_code;
0795af57 949 DECLARE_MAC_BUF(mac);
f0706e82
JB		 950
951 if (ifsta->state != IEEE80211_AUTHENTICATE &&
952 sdata->type != IEEE80211_IF_TYPE_IBSS) {
953 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 954 "%s, but not in authenticate state - ignored\n",
955 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 956 return;
957 }
958
959 if (len < 24 + 6) {
960 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 961 "received from %s - ignored\n",
962 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 963 return;
964 }
965
966 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
967 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
968 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 969 "unknown AP (SA=%s BSSID=%s) - "
970 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
971 print_mac(mac, mgmt->bssid));
f0706e82
JB		 972 return;
973 }
974
975 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
976 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
977 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 978 "unknown BSSID (SA=%s BSSID=%s) - "
979 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
980 print_mac(mac, mgmt->bssid));
f0706e82
JB		 981 return;
982 }
983
984 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
985 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
986 status_code = le16_to_cpu(mgmt->u.auth.status_code);
987
0795af57 988 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 989 "transaction=%d status=%d)\n",
0795af57 990 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 991 auth_transaction, status_code);
992
993 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
994 /* IEEE 802.11 standard does not require authentication in IBSS
995 * networks and most implementations do not seem to use it.
996 * However, try to reply to authentication attempts if someone
997 * has actually implemented this.
998 * TODO: Could implement shared key authentication. */
999 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1000 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1001 "frame (alg=%d transaction=%d)\n",
1002 dev->name, auth_alg, auth_transaction);
1003 return;
1004 }
1005 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1006 }
1007
1008 if (auth_alg != ifsta->auth_alg ||
1009 auth_transaction != ifsta->auth_transaction) {
1010 printk(KERN_DEBUG "%s: unexpected authentication frame "
1011 "(alg=%d transaction=%d)\n",
1012 dev->name, auth_alg, auth_transaction);
1013 return;
1014 }
1015
1016 if (status_code != WLAN_STATUS_SUCCESS) {
1017 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1018 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1019 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1020 u8 algs[3];
1021 const int num_algs = ARRAY_SIZE(algs);
1022 int i, pos;
1023 algs[0] = algs[1] = algs[2] = 0xff;
1024 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1025 algs[0] = WLAN_AUTH_OPEN;
1026 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1027 algs[1] = WLAN_AUTH_SHARED_KEY;
1028 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1029 algs[2] = WLAN_AUTH_LEAP;
1030 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1031 pos = 0;
1032 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1033 pos = 1;
1034 else
1035 pos = 2;
1036 for (i = 0; i < num_algs; i++) {
1037 pos++;
1038 if (pos >= num_algs)
1039 pos = 0;
1040 if (algs[pos] == ifsta->auth_alg ||
1041 algs[pos] == 0xff)
1042 continue;
1043 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1044 !ieee80211_sta_wep_configured(dev))
1045 continue;
1046 ifsta->auth_alg = algs[pos];
1047 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1048 "next try\n",
1049 dev->name, ifsta->auth_alg);
1050 break;
1051 }
1052 }
1053 return;
1054 }
1055
1056 switch (ifsta->auth_alg) {
1057 case WLAN_AUTH_OPEN:
1058 case WLAN_AUTH_LEAP:
1059 ieee80211_auth_completed(dev, ifsta);
1060 break;
1061 case WLAN_AUTH_SHARED_KEY:
1062 if (ifsta->auth_transaction == 4)
1063 ieee80211_auth_completed(dev, ifsta);
1064 else
1065 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1066 break;
1067 }
1068}
1069
1070
1071static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1072 struct ieee80211_if_sta *ifsta,
1073 struct ieee80211_mgmt *mgmt,
1074 size_t len)
1075{
1076 u16 reason_code;
0795af57 1077 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1078
1079 if (len < 24 + 2) {
1080 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1081 "received from %s - ignored\n",
1082 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1083 return;
1084 }
1085
1086 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1087 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1088 "unknown AP (SA=%s BSSID=%s) - "
1089 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1090 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1091 return;
1092 }
1093
1094 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1095
0795af57 1096 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1097 " (reason=%d)\n",
0795af57 1098 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1099
d6f2da5b 1100 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1101 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1102 }
1103
1104 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1105 ifsta->state == IEEE80211_ASSOCIATE ||
1106 ifsta->state == IEEE80211_ASSOCIATED) {
1107 ifsta->state = IEEE80211_AUTHENTICATE;
1108 mod_timer(&ifsta->timer, jiffies +
1109 IEEE80211_RETRY_AUTH_INTERVAL);
1110 }
1111
1112 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1113 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1114}
1115
1116
1117static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1118 struct ieee80211_if_sta *ifsta,
1119 struct ieee80211_mgmt *mgmt,
1120 size_t len)
1121{
1122 u16 reason_code;
0795af57 1123 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1124
1125 if (len < 24 + 2) {
1126 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1127 "received from %s - ignored\n",
1128 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1129 return;
1130 }
1131
1132 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1133 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1134 "unknown AP (SA=%s BSSID=%s) - "
1135 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1136 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1137 return;
1138 }
1139
1140 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1141
0795af57 1142 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1143 " (reason=%d)\n",
0795af57 1144 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1145
d6f2da5b 1146 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1147 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1148
1149 if (ifsta->state == IEEE80211_ASSOCIATED) {
1150 ifsta->state = IEEE80211_ASSOCIATE;
1151 mod_timer(&ifsta->timer, jiffies +
1152 IEEE80211_RETRY_AUTH_INTERVAL);
1153 }
1154
1155 ieee80211_set_disassoc(dev, ifsta, 0);
1156}
1157
1158
1159static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1160 struct ieee80211_if_sta *ifsta,
1161 struct ieee80211_mgmt *mgmt,
1162 size_t len,
1163 int reassoc)
1164{
1165 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1166 struct ieee80211_hw_mode *mode;
1167 struct sta_info *sta;
1168 u32 rates;
1169 u16 capab_info, status_code, aid;
1170 struct ieee802_11_elems elems;
1171 u8 *pos;
1172 int i, j;
0795af57 1173 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1174
1175 /* AssocResp and ReassocResp have identical structure, so process both
1176 * of them in this function. */
1177
1178 if (ifsta->state != IEEE80211_ASSOCIATE) {
1179 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1180 "%s, but not in associate state - ignored\n",
1181 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1182 return;
1183 }
1184
1185 if (len < 24 + 6) {
1186 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1187 "received from %s - ignored\n",
1188 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1189 return;
1190 }
1191
1192 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1193 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1194 "unknown AP (SA=%s BSSID=%s) - "
1195 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1196 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1197 return;
1198 }
1199
1200 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1201 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1202 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
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
0795af57 1208 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1209 "status=%d aid=%d)\n",
0795af57 1210 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
f0706e82
JB		 1211 capab_info, status_code, aid);
1212
1213 if (status_code != WLAN_STATUS_SUCCESS) {
1214 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1215 dev->name, status_code);
8a69aa93
DD		 1216 /* if this was a reassociation, ensure we try a "full"
1217 * association next time. This works around some broken APs
1218 * which do not correctly reject reassociation requests. */
d6f2da5b 1219 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1220 return;
1221 }
1222
1223 pos = mgmt->u.assoc_resp.variable;
1224 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1225 == ParseFailed) {
1226 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1227 dev->name);
1228 return;
1229 }
1230
1231 if (!elems.supp_rates) {
1232 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1233 dev->name);
1234 return;
1235 }
1236
5628221c
DD		 1237 /* it probably doesn't, but if the frame includes an ERP value then
1238 * update our stored copy */
1239 if (elems.erp_info && elems.erp_info_len >= 1) {
1240 struct ieee80211_sta_bss *bss
1241 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1242 if (bss) {
1243 bss->erp_value = elems.erp_info[0];
1244 bss->has_erp_value = 1;
1245 ieee80211_rx_bss_put(dev, bss);
1246 }
1247 }
1248
f0706e82
JB		 1249 printk(KERN_DEBUG "%s: associated\n", dev->name);
1250 ifsta->aid = aid;
1251 ifsta->ap_capab = capab_info;
1252
1253 kfree(ifsta->assocresp_ies);
1254 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1255 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1256 if (ifsta->assocresp_ies)
1257 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1258
1259 ieee80211_set_associated(dev, ifsta, 1);
1260
1261 /* Add STA entry for the AP */
1262 sta = sta_info_get(local, ifsta->bssid);
1263 if (!sta) {
1264 struct ieee80211_sta_bss *bss;
0ec0b7ac 1265 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1266 if (!sta) {
1267 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1268 " AP\n", dev->name);
1269 return;
1270 }
1271 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1272 if (bss) {
1273 sta->last_rssi = bss->rssi;
1274 sta->last_signal = bss->signal;
1275 sta->last_noise = bss->noise;
1276 ieee80211_rx_bss_put(dev, bss);
1277 }
1278 }
1279
1280 sta->dev = dev;
c9ee23df 1281 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1282
1283 rates = 0;
1284 mode = local->oper_hw_mode;
1285 for (i = 0; i < elems.supp_rates_len; i++) {
1286 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1287 for (j = 0; j < mode->num_rates; j++)
1288 if (mode->rates[j].rate == rate)
1289 rates |= BIT(j);
1290 }
1291 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1292 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1293 for (j = 0; j < mode->num_rates; j++)
1294 if (mode->rates[j].rate == rate)
1295 rates |= BIT(j);
1296 }
1297 sta->supp_rates = rates;
1298
1299 rate_control_rate_init(sta, local);
1300
d6f2da5b 1301 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1302 sta->flags |= WLAN_STA_WME;
1303 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1304 elems.wmm_param_len);
1305 }
1306
1307
1308 sta_info_put(sta);
1309
1310 ieee80211_associated(dev, ifsta);
1311}
1312
1313
1314/* Caller must hold local->sta_bss_lock */
1315static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1316 struct ieee80211_sta_bss *bss)
1317{
1318 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1319 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1320 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1321}
1322
1323
1324/* Caller must hold local->sta_bss_lock */
1325static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1326 struct ieee80211_sta_bss *bss)
1327{
1328 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1329 struct ieee80211_sta_bss *b, *prev = NULL;
1330 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1331 while (b) {
1332 if (b == bss) {
1333 if (!prev)
1334 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1335 bss->hnext;
1336 else
1337 prev->hnext = bss->hnext;
1338 break;
1339 }
1340 prev = b;
1341 b = b->hnext;
1342 }
1343}
1344
1345
1346static struct ieee80211_sta_bss *
1347ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1348{
1349 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1350 struct ieee80211_sta_bss *bss;
1351
dd00cc48 1352 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1353 if (!bss)
1354 return NULL;
f0706e82
JB		 1355 atomic_inc(&bss->users);
1356 atomic_inc(&bss->users);
1357 memcpy(bss->bssid, bssid, ETH_ALEN);
1358
1359 spin_lock_bh(&local->sta_bss_lock);
1360 /* TODO: order by RSSI? */
1361 list_add_tail(&bss->list, &local->sta_bss_list);
1362 __ieee80211_rx_bss_hash_add(dev, bss);
1363 spin_unlock_bh(&local->sta_bss_lock);
1364 return bss;
1365}
1366
1367
1368static struct ieee80211_sta_bss *
1369ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1370{
1371 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1372 struct ieee80211_sta_bss *bss;
1373
1374 spin_lock_bh(&local->sta_bss_lock);
1375 bss = local->sta_bss_hash[STA_HASH(bssid)];
1376 while (bss) {
1377 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1378 atomic_inc(&bss->users);
1379 break;
1380 }
1381 bss = bss->hnext;
1382 }
1383 spin_unlock_bh(&local->sta_bss_lock);
1384 return bss;
1385}
1386
1387
1388static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1389{
1390 kfree(bss->wpa_ie);
1391 kfree(bss->rsn_ie);
1392 kfree(bss->wmm_ie);
1393 kfree(bss);
1394}
1395
1396
1397static void ieee80211_rx_bss_put(struct net_device *dev,
1398 struct ieee80211_sta_bss *bss)
1399{
1400 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401 if (!atomic_dec_and_test(&bss->users))
1402 return;
1403
1404 spin_lock_bh(&local->sta_bss_lock);
1405 __ieee80211_rx_bss_hash_del(dev, bss);
1406 list_del(&bss->list);
1407 spin_unlock_bh(&local->sta_bss_lock);
1408 ieee80211_rx_bss_free(bss);
1409}
1410
1411
1412void ieee80211_rx_bss_list_init(struct net_device *dev)
1413{
1414 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1415 spin_lock_init(&local->sta_bss_lock);
1416 INIT_LIST_HEAD(&local->sta_bss_list);
1417}
1418
1419
1420void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1421{
1422 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1423 struct ieee80211_sta_bss *bss, *tmp;
1424
1425 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1426 ieee80211_rx_bss_put(dev, bss);
1427}
1428
1429
1430static void ieee80211_rx_bss_info(struct net_device *dev,
1431 struct ieee80211_mgmt *mgmt,
1432 size_t len,
1433 struct ieee80211_rx_status *rx_status,
1434 int beacon)
1435{
1436 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1437 struct ieee802_11_elems elems;
1438 size_t baselen;
1439 int channel, invalid = 0, clen;
1440 struct ieee80211_sta_bss *bss;
1441 struct sta_info *sta;
1442 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1443 u64 timestamp;
0795af57
JP		 1444 DECLARE_MAC_BUF(mac);
1445 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 1446
1447 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1448 return; /* ignore ProbeResp to foreign address */
1449
1450#if 0
0795af57 1451 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 1452 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 1453 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 1454#endif
1455
1456 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1457 if (baselen > len)
1458 return;
1459
1460 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1461
1462 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1463 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1464#ifdef CONFIG_MAC80211_IBSS_DEBUG
1465 static unsigned long last_tsf_debug = 0;
1466 u64 tsf;
1467 if (local->ops->get_tsf)
1468 tsf = local->ops->get_tsf(local_to_hw(local));
1469 else
1470 tsf = -1LLU;
1471 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 1472 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1473 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 1474 "@%lu\n",
0795af57 1475 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 1476 (unsigned long long)tsf,
1477 (unsigned long long)timestamp,
1478 (unsigned long long)(tsf - timestamp),
1479 jiffies);
1480 last_tsf_debug = jiffies;
1481 }
1482#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1483 }
1484
1485 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1486 &elems) == ParseFailed)
1487 invalid = 1;
1488
1489 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1490 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1491 (sta = sta_info_get(local, mgmt->sa))) {
1492 struct ieee80211_hw_mode *mode;
1493 struct ieee80211_rate *rates;
1494 size_t num_rates;
1495 u32 supp_rates, prev_rates;
1496 int i, j;
1497
1498 mode = local->sta_scanning ?
1499 local->scan_hw_mode : local->oper_hw_mode;
1500 rates = mode->rates;
1501 num_rates = mode->num_rates;
1502
1503 supp_rates = 0;
1504 for (i = 0; i < elems.supp_rates_len +
1505 elems.ext_supp_rates_len; i++) {
1506 u8 rate = 0;
1507 int own_rate;
1508 if (i < elems.supp_rates_len)
1509 rate = elems.supp_rates[i];
1510 else if (elems.ext_supp_rates)
1511 rate = elems.ext_supp_rates
1512 [i - elems.supp_rates_len];
1513 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 1514 for (j = 0; j < num_rates; j++)
1515 if (rates[j].rate == own_rate)
1516 supp_rates |= BIT(j);
1517 }
1518
1519 prev_rates = sta->supp_rates;
1520 sta->supp_rates &= supp_rates;
1521 if (sta->supp_rates == 0) {
1522 /* No matching rates - this should not really happen.
1523 * Make sure that at least one rate is marked
1524 * supported to avoid issues with TX rate ctrl. */
1525 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1526 }
1527 if (sta->supp_rates != prev_rates) {
1528 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 1529 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 1530 "0x%x)\n",
0795af57 1531 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 1532 supp_rates, sta->supp_rates);
1533 }
1534 sta_info_put(sta);
1535 }
1536
1537 if (!elems.ssid)
1538 return;
1539
1540 if (elems.ds_params && elems.ds_params_len == 1)
1541 channel = elems.ds_params[0];
1542 else
1543 channel = rx_status->channel;
1544
1545 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1546 if (!bss) {
1547 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1548 if (!bss)
1549 return;
1550 } else {
1551#if 0
1552 /* TODO: order by RSSI? */
1553 spin_lock_bh(&local->sta_bss_lock);
1554 list_move_tail(&bss->list, &local->sta_bss_list);
1555 spin_unlock_bh(&local->sta_bss_lock);
1556#endif
1557 }
1558
1559 if (bss->probe_resp && beacon) {
1560 /* Do not allow beacon to override data from Probe Response. */
1561 ieee80211_rx_bss_put(dev, bss);
1562 return;
1563 }
1564
5628221c
DD		 1565 /* save the ERP value so that it is available at association time */
1566 if (elems.erp_info && elems.erp_info_len >= 1) {
1567 bss->erp_value = elems.erp_info[0];
1568 bss->has_erp_value = 1;
1569 }
1570
f0706e82
JB		 1571 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1572 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1573 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1574 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1575 bss->ssid_len = elems.ssid_len;
1576 }
1577
1578 bss->supp_rates_len = 0;
1579 if (elems.supp_rates) {
1580 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1581 if (clen > elems.supp_rates_len)
1582 clen = elems.supp_rates_len;
1583 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1584 clen);
1585 bss->supp_rates_len += clen;
1586 }
1587 if (elems.ext_supp_rates) {
1588 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1589 if (clen > elems.ext_supp_rates_len)
1590 clen = elems.ext_supp_rates_len;
1591 memcpy(&bss->supp_rates[bss->supp_rates_len],
1592 elems.ext_supp_rates, clen);
1593 bss->supp_rates_len += clen;
1594 }
1595
1596 if (elems.wpa &&
1597 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1598 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1599 kfree(bss->wpa_ie);
1600 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1601 if (bss->wpa_ie) {
1602 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1603 bss->wpa_ie_len = elems.wpa_len + 2;
1604 } else
1605 bss->wpa_ie_len = 0;
1606 } else if (!elems.wpa && bss->wpa_ie) {
1607 kfree(bss->wpa_ie);
1608 bss->wpa_ie = NULL;
1609 bss->wpa_ie_len = 0;
1610 }
1611
1612 if (elems.rsn &&
1613 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1614 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1615 kfree(bss->rsn_ie);
1616 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1617 if (bss->rsn_ie) {
1618 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1619 bss->rsn_ie_len = elems.rsn_len + 2;
1620 } else
1621 bss->rsn_ie_len = 0;
1622 } else if (!elems.rsn && bss->rsn_ie) {
1623 kfree(bss->rsn_ie);
1624 bss->rsn_ie = NULL;
1625 bss->rsn_ie_len = 0;
1626 }
1627
1628 if (elems.wmm_param &&
1629 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1630 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1631 kfree(bss->wmm_ie);
1632 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1633 if (bss->wmm_ie) {
1634 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1635 elems.wmm_param_len + 2);
1636 bss->wmm_ie_len = elems.wmm_param_len + 2;
1637 } else
1638 bss->wmm_ie_len = 0;
1639 } else if (!elems.wmm_param && bss->wmm_ie) {
1640 kfree(bss->wmm_ie);
1641 bss->wmm_ie = NULL;
1642 bss->wmm_ie_len = 0;
1643 }
1644
1645
1646 bss->hw_mode = rx_status->phymode;
1647 bss->channel = channel;
1648 bss->freq = rx_status->freq;
1649 if (channel != rx_status->channel &&
1650 (bss->hw_mode == MODE_IEEE80211G ||
1651 bss->hw_mode == MODE_IEEE80211B) &&
1652 channel >= 1 && channel <= 14) {
1653 static const int freq_list[] = {
1654 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1655 2447, 2452, 2457, 2462, 2467, 2472, 2484
1656 };
1657 /* IEEE 802.11g/b mode can receive packets from neighboring
1658 * channels, so map the channel into frequency. */
1659 bss->freq = freq_list[channel - 1];
1660 }
1661 bss->timestamp = timestamp;
1662 bss->last_update = jiffies;
1663 bss->rssi = rx_status->ssi;
1664 bss->signal = rx_status->signal;
1665 bss->noise = rx_status->noise;
1666 if (!beacon)
1667 bss->probe_resp++;
1668 ieee80211_rx_bss_put(dev, bss);
1669}
1670
1671
1672static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1673 struct ieee80211_mgmt *mgmt,
1674 size_t len,
1675 struct ieee80211_rx_status *rx_status)
1676{
1677 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1678}
1679
1680
1681static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1682 struct ieee80211_mgmt *mgmt,
1683 size_t len,
1684 struct ieee80211_rx_status *rx_status)
1685{
f0706e82
JB		 1686 struct ieee80211_sub_if_data *sdata;
1687 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1688 size_t baselen;
1689 struct ieee802_11_elems elems;
1690
1691 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1692
1693 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1694 if (sdata->type != IEEE80211_IF_TYPE_STA)
1695 return;
1696 ifsta = &sdata->u.sta;
1697
d6f2da5b 1698 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1699 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1700 return;
1701
1702 /* Process beacon from the current BSS */
1703 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1704 if (baselen > len)
1705 return;
1706
1707 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1708 &elems) == ParseFailed)
1709 return;
1710
5628221c
DD		 1711 if (elems.erp_info && elems.erp_info_len >= 1)
1712 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82 1713
d6f2da5b 1714 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1715 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1716 elems.wmm_param_len);
1717 }
1718}
1719
1720
1721static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1722 struct ieee80211_if_sta *ifsta,
1723 struct ieee80211_mgmt *mgmt,
1724 size_t len,
1725 struct ieee80211_rx_status *rx_status)
1726{
1727 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1729 int tx_last_beacon;
1730 struct sk_buff *skb;
1731 struct ieee80211_mgmt *resp;
1732 u8 *pos, *end;
0795af57
JP		 1733 DECLARE_MAC_BUF(mac);
1734#ifdef CONFIG_MAC80211_IBSS_DEBUG
1735 DECLARE_MAC_BUF(mac2);
1736 DECLARE_MAC_BUF(mac3);
1737#endif
f0706e82
JB		 1738
1739 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1740 ifsta->state != IEEE80211_IBSS_JOINED ||
1741 len < 24 + 2 || !ifsta->probe_resp)
1742 return;
1743
1744 if (local->ops->tx_last_beacon)
1745 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1746 else
1747 tx_last_beacon = 1;
1748
1749#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1750 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1751 "%s (tx_last_beacon=%d)\n",
1752 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1753 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1754#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1755
1756 if (!tx_last_beacon)
1757 return;
1758
1759 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1760 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1761 return;
1762
1763 end = ((u8 *) mgmt) + len;
1764 pos = mgmt->u.probe_req.variable;
1765 if (pos[0] != WLAN_EID_SSID ||
1766 pos + 2 + pos[1] > end) {
1767 if (net_ratelimit()) {
1768 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 1769 "from %s\n",
1770 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1771 }
1772 return;
1773 }
1774 if (pos[1] != 0 &&
1775 (pos[1] != ifsta->ssid_len ||
1776 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1777 /* Ignore ProbeReq for foreign SSID */
1778 return;
1779 }
1780
1781 /* Reply with ProbeResp */
0ec0b7ac 1782 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1783 if (!skb)
1784 return;
1785
1786 resp = (struct ieee80211_mgmt *) skb->data;
1787 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1788#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1789 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1790 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 1791#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1792 ieee80211_sta_tx(dev, skb, 0);
1793}
1794
1795
1796void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1797 struct ieee80211_rx_status *rx_status)
1798{
1799 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1800 struct ieee80211_sub_if_data *sdata;
1801 struct ieee80211_if_sta *ifsta;
1802 struct ieee80211_mgmt *mgmt;
1803 u16 fc;
1804
1805 if (skb->len < 24)
1806 goto fail;
1807
1808 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1809 ifsta = &sdata->u.sta;
1810
1811 mgmt = (struct ieee80211_mgmt *) skb->data;
1812 fc = le16_to_cpu(mgmt->frame_control);
1813
1814 switch (fc & IEEE80211_FCTL_STYPE) {
1815 case IEEE80211_STYPE_PROBE_REQ:
1816 case IEEE80211_STYPE_PROBE_RESP:
1817 case IEEE80211_STYPE_BEACON:
1818 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1819 case IEEE80211_STYPE_AUTH:
1820 case IEEE80211_STYPE_ASSOC_RESP:
1821 case IEEE80211_STYPE_REASSOC_RESP:
1822 case IEEE80211_STYPE_DEAUTH:
1823 case IEEE80211_STYPE_DISASSOC:
1824 skb_queue_tail(&ifsta->skb_queue, skb);
1825 queue_work(local->hw.workqueue, &ifsta->work);
1826 return;
1827 default:
1828 printk(KERN_DEBUG "%s: received unknown management frame - "
1829 "stype=%d\n", dev->name,
1830 (fc & IEEE80211_FCTL_STYPE) >> 4);
1831 break;
1832 }
1833
1834 fail:
1835 kfree_skb(skb);
1836}
1837
1838
1839static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1840 struct sk_buff *skb)
1841{
1842 struct ieee80211_rx_status *rx_status;
1843 struct ieee80211_sub_if_data *sdata;
1844 struct ieee80211_if_sta *ifsta;
1845 struct ieee80211_mgmt *mgmt;
1846 u16 fc;
1847
1848 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1849 ifsta = &sdata->u.sta;
1850
1851 rx_status = (struct ieee80211_rx_status *) skb->cb;
1852 mgmt = (struct ieee80211_mgmt *) skb->data;
1853 fc = le16_to_cpu(mgmt->frame_control);
1854
1855 switch (fc & IEEE80211_FCTL_STYPE) {
1856 case IEEE80211_STYPE_PROBE_REQ:
1857 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1858 rx_status);
1859 break;
1860 case IEEE80211_STYPE_PROBE_RESP:
1861 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1862 break;
1863 case IEEE80211_STYPE_BEACON:
1864 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1865 break;
1866 case IEEE80211_STYPE_AUTH:
1867 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1868 break;
1869 case IEEE80211_STYPE_ASSOC_RESP:
1870 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1871 break;
1872 case IEEE80211_STYPE_REASSOC_RESP:
1873 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1874 break;
1875 case IEEE80211_STYPE_DEAUTH:
1876 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1877 break;
1878 case IEEE80211_STYPE_DISASSOC:
1879 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1880 break;
1881 }
1882
1883 kfree_skb(skb);
1884}
1885
1886
1887void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1888 struct ieee80211_rx_status *rx_status)
1889{
1890 struct ieee80211_mgmt *mgmt;
1891 u16 fc;
1892
1893 if (skb->len < 24) {
1894 dev_kfree_skb(skb);
1895 return;
1896 }
1897
1898 mgmt = (struct ieee80211_mgmt *) skb->data;
1899 fc = le16_to_cpu(mgmt->frame_control);
1900
1901 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1902 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1903 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1904 skb->len, rx_status);
1905 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1906 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1907 rx_status);
1908 }
1909 }
1910
1911 dev_kfree_skb(skb);
1912}
1913
1914
1915static int ieee80211_sta_active_ibss(struct net_device *dev)
1916{
1917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1918 int active = 0;
1919 struct sta_info *sta;
1920
be8755e1 1921 read_lock_bh(&local->sta_lock);
f0706e82
JB		 1922 list_for_each_entry(sta, &local->sta_list, list) {
1923 if (sta->dev == dev &&
1924 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1925 jiffies)) {
1926 active++;
1927 break;
1928 }
1929 }
be8755e1 1930 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 1931
1932 return active;
1933}
1934
1935
1936static void ieee80211_sta_expire(struct net_device *dev)
1937{
1938 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1939 struct sta_info *sta, *tmp;
be8755e1 1940 LIST_HEAD(tmp_list);
0795af57 1941 DECLARE_MAC_BUF(mac);
f0706e82 1942
be8755e1 1943 write_lock_bh(&local->sta_lock);
f0706e82
JB		 1944 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1945 if (time_after(jiffies, sta->last_rx +
1946 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 1947 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
1948 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 1949 __sta_info_get(sta);
1950 sta_info_remove(sta);
1951 list_add(&sta->list, &tmp_list);
f0706e82 1952 }
be8755e1
MW		 1953 write_unlock_bh(&local->sta_lock);
1954
1955 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1956 sta_info_free(sta);
1957 sta_info_put(sta);
1958 }
f0706e82
JB		 1959}
1960
1961
1962static void ieee80211_sta_merge_ibss(struct net_device *dev,
1963 struct ieee80211_if_sta *ifsta)
1964{
1965 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1966
1967 ieee80211_sta_expire(dev);
1968 if (ieee80211_sta_active_ibss(dev))
1969 return;
1970
1971 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1972 "IBSS networks with same SSID (merge)\n", dev->name);
1973 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1974}
1975
1976
1977void ieee80211_sta_timer(unsigned long data)
1978{
1979 struct ieee80211_sub_if_data *sdata =
1980 (struct ieee80211_sub_if_data *) data;
1981 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1982 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1983
1984 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1985 queue_work(local->hw.workqueue, &ifsta->work);
1986}
1987
1988
1989void ieee80211_sta_work(struct work_struct *work)
1990{
1991 struct ieee80211_sub_if_data *sdata =
1992 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1993 struct net_device *dev = sdata->dev;
1994 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1995 struct ieee80211_if_sta *ifsta;
1996 struct sk_buff *skb;
1997
1998 if (!netif_running(dev))
1999 return;
2000
2001 if (local->sta_scanning)
2002 return;
2003
2004 if (sdata->type != IEEE80211_IF_TYPE_STA &&
2005 sdata->type != IEEE80211_IF_TYPE_IBSS) {
2006 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2007 "(type=%d)\n", dev->name, sdata->type);
2008 return;
2009 }
2010 ifsta = &sdata->u.sta;
2011
2012 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2013 ieee80211_sta_rx_queued_mgmt(dev, skb);
2014
2015 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2016 ifsta->state != IEEE80211_ASSOCIATE &&
2017 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2018 ieee80211_sta_start_scan(dev, NULL, 0);
2019 return;
2020 }
2021
2022 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2023 if (ieee80211_sta_config_auth(dev, ifsta))
2024 return;
2025 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2026 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2027 return;
2028
2029 switch (ifsta->state) {
2030 case IEEE80211_DISABLED:
2031 break;
2032 case IEEE80211_AUTHENTICATE:
2033 ieee80211_authenticate(dev, ifsta);
2034 break;
2035 case IEEE80211_ASSOCIATE:
2036 ieee80211_associate(dev, ifsta);
2037 break;
2038 case IEEE80211_ASSOCIATED:
2039 ieee80211_associated(dev, ifsta);
2040 break;
2041 case IEEE80211_IBSS_SEARCH:
2042 ieee80211_sta_find_ibss(dev, ifsta);
2043 break;
2044 case IEEE80211_IBSS_JOINED:
2045 ieee80211_sta_merge_ibss(dev, ifsta);
2046 break;
2047 default:
2048 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2049 ifsta->state);
2050 break;
2051 }
2052
2053 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2054 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2055 "mixed-cell disabled - disassociate\n", dev->name);
2056
2057 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2058 ieee80211_set_disassoc(dev, ifsta, 0);
2059 }
2060}
2061
2062
2063static void ieee80211_sta_reset_auth(struct net_device *dev,
2064 struct ieee80211_if_sta *ifsta)
2065{
2066 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2067
2068 if (local->ops->reset_tsf) {
2069 /* Reset own TSF to allow time synchronization work. */
2070 local->ops->reset_tsf(local_to_hw(local));
2071 }
2072
2073 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2074
2075
2076 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2077 ifsta->auth_alg = WLAN_AUTH_OPEN;
2078 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2079 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2080 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2081 ifsta->auth_alg = WLAN_AUTH_LEAP;
2082 else
2083 ifsta->auth_alg = WLAN_AUTH_OPEN;
2084 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2085 ifsta->auth_alg);
2086 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2087 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2088 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2089 netif_carrier_off(dev);
2090}
2091
2092
2093void ieee80211_sta_req_auth(struct net_device *dev,
2094 struct ieee80211_if_sta *ifsta)
2095{
2096 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2097 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2098
2099 if (sdata->type != IEEE80211_IF_TYPE_STA)
2100 return;
2101
d6f2da5b
JS		 2102 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2103 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2104 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2105 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2106 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2107 queue_work(local->hw.workqueue, &ifsta->work);
2108 }
2109}
2110
2111static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2112 const char *ssid, int ssid_len)
2113{
2114 int tmp, hidden_ssid;
2115
2116 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2117 return 1;
2118
d6f2da5b 2119 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2120 return 0;
2121
2122 hidden_ssid = 1;
2123 tmp = ssid_len;
2124 while (tmp--) {
2125 if (ssid[tmp] != '\0') {
2126 hidden_ssid = 0;
2127 break;
2128 }
2129 }
2130
2131 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2132 return 1;
2133
2134 if (ssid_len == 1 && ssid[0] == ' ')
2135 return 1;
2136
2137 return 0;
2138}
2139
2140static int ieee80211_sta_config_auth(struct net_device *dev,
2141 struct ieee80211_if_sta *ifsta)
2142{
2143 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2144 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2145 struct ieee80211_sta_bss *bss, *selected = NULL;
2146 int top_rssi = 0, freq;
2147
d6f2da5b
JS		 2148 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2149 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2150 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2151 ieee80211_sta_reset_auth(dev, ifsta);
2152 return 0;
2153 }
2154
2155 spin_lock_bh(&local->sta_bss_lock);
2156 freq = local->oper_channel->freq;
2157 list_for_each_entry(bss, &local->sta_bss_list, list) {
2158 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2159 continue;
2160
2161 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2162 !!sdata->default_key)
2163 continue;
2164
d6f2da5b
JS		 2165 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2166 bss->freq != freq)
f0706e82
JB		 2167 continue;
2168
d6f2da5b 2169 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2170 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2171 continue;
2172
d6f2da5b 2173 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2174 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2175 continue;
2176
2177 if (!selected || top_rssi < bss->rssi) {
2178 selected = bss;
2179 top_rssi = bss->rssi;
2180 }
2181 }
2182 if (selected)
2183 atomic_inc(&selected->users);
2184 spin_unlock_bh(&local->sta_bss_lock);
2185
2186 if (selected) {
2187 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2188 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2189 ieee80211_sta_set_ssid(dev, selected->ssid,
2190 selected->ssid_len);
2191 ieee80211_sta_set_bssid(dev, selected->bssid);
2192 ieee80211_rx_bss_put(dev, selected);
2193 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2194 ieee80211_sta_reset_auth(dev, ifsta);
2195 return 0;
2196 } else {
2197 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2198 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2199 ieee80211_sta_start_scan(dev, NULL, 0);
2200 else
2201 ieee80211_sta_start_scan(dev, ifsta->ssid,
2202 ifsta->ssid_len);
f0706e82
JB		 2203 ifsta->state = IEEE80211_AUTHENTICATE;
2204 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2205 } else
2206 ifsta->state = IEEE80211_DISABLED;
2207 }
f0706e82
JB		 2208 return -1;
2209}
2210
2211static int ieee80211_sta_join_ibss(struct net_device *dev,
2212 struct ieee80211_if_sta *ifsta,
2213 struct ieee80211_sta_bss *bss)
2214{
2215 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2216 int res, rates, i, j;
2217 struct sk_buff *skb;
2218 struct ieee80211_mgmt *mgmt;
2219 struct ieee80211_tx_control control;
2220 struct ieee80211_rate *rate;
2221 struct ieee80211_hw_mode *mode;
2222 struct rate_control_extra extra;
2223 u8 *pos;
2224 struct ieee80211_sub_if_data *sdata;
2225
2226 /* Remove possible STA entries from other IBSS networks. */
2227 sta_info_flush(local, NULL);
2228
2229 if (local->ops->reset_tsf) {
2230 /* Reset own TSF to allow time synchronization work. */
2231 local->ops->reset_tsf(local_to_hw(local));
2232 }
2233 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2234 res = ieee80211_if_config(dev);
2235 if (res)
2236 return res;
2237
2238 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2239
2240 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2241 sdata->drop_unencrypted = bss->capability &
2242 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2243
2244 res = ieee80211_set_channel(local, -1, bss->freq);
2245
2246 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2247 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2248 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2249 local->hw.conf.freq);
2250 return -1;
2251 }
2252
2253 /* Set beacon template based on scan results */
2254 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2255 do {
2256 if (!skb)
2257 break;
2258
2259 skb_reserve(skb, local->hw.extra_tx_headroom);
2260
2261 mgmt = (struct ieee80211_mgmt *)
2262 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2263 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2264 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2265 IEEE80211_STYPE_BEACON);
2266 memset(mgmt->da, 0xff, ETH_ALEN);
2267 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2268 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2269 mgmt->u.beacon.beacon_int =
2270 cpu_to_le16(local->hw.conf.beacon_int);
2271 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2272
2273 pos = skb_put(skb, 2 + ifsta->ssid_len);
2274 *pos++ = WLAN_EID_SSID;
2275 *pos++ = ifsta->ssid_len;
2276 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2277
2278 rates = bss->supp_rates_len;
2279 if (rates > 8)
2280 rates = 8;
2281 pos = skb_put(skb, 2 + rates);
2282 *pos++ = WLAN_EID_SUPP_RATES;
2283 *pos++ = rates;
2284 memcpy(pos, bss->supp_rates, rates);
2285
2286 pos = skb_put(skb, 2 + 1);
2287 *pos++ = WLAN_EID_DS_PARAMS;
2288 *pos++ = 1;
2289 *pos++ = bss->channel;
2290
2291 pos = skb_put(skb, 2 + 2);
2292 *pos++ = WLAN_EID_IBSS_PARAMS;
2293 *pos++ = 2;
2294 /* FIX: set ATIM window based on scan results */
2295 *pos++ = 0;
2296 *pos++ = 0;
2297
2298 if (bss->supp_rates_len > 8) {
2299 rates = bss->supp_rates_len - 8;
2300 pos = skb_put(skb, 2 + rates);
2301 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2302 *pos++ = rates;
2303 memcpy(pos, &bss->supp_rates[8], rates);
2304 }
2305
2306 memset(&control, 0, sizeof(control));
2307 memset(&extra, 0, sizeof(extra));
2308 extra.mode = local->oper_hw_mode;
2309 rate = rate_control_get_rate(local, dev, skb, &extra);
2310 if (!rate) {
2311 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2312 "for IBSS beacon\n", dev->name);
2313 break;
2314 }
13262ffd
JS		 2315 control.tx_rate =
2316 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2317 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
f0706e82
JB		 2318 rate->val2 : rate->val;
2319 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2320 control.power_level = local->hw.conf.power_level;
2321 control.flags |= IEEE80211_TXCTL_NO_ACK;
2322 control.retry_limit = 1;
2323
2324 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2325 if (ifsta->probe_resp) {
2326 mgmt = (struct ieee80211_mgmt *)
2327 ifsta->probe_resp->data;
2328 mgmt->frame_control =
2329 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2330 IEEE80211_STYPE_PROBE_RESP);
2331 } else {
2332 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2333 "template for IBSS\n", dev->name);
2334 }
2335
2336 if (local->ops->beacon_update &&
2337 local->ops->beacon_update(local_to_hw(local),
2338 skb, &control) == 0) {
2339 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2340 "template based on scan results\n", dev->name);
2341 skb = NULL;
2342 }
2343
2344 rates = 0;
2345 mode = local->oper_hw_mode;
2346 for (i = 0; i < bss->supp_rates_len; i++) {
2347 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 2348 for (j = 0; j < mode->num_rates; j++)
2349 if (mode->rates[j].rate == bitrate)
2350 rates |= BIT(j);
2351 }
2352 ifsta->supp_rates_bits = rates;
2353 } while (0);
2354
2355 if (skb) {
2356 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2357 "template\n", dev->name);
2358 dev_kfree_skb(skb);
2359 }
2360
2361 ifsta->state = IEEE80211_IBSS_JOINED;
2362 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2363
2364 ieee80211_rx_bss_put(dev, bss);
2365
2366 return res;
2367}
2368
2369
2370static int ieee80211_sta_create_ibss(struct net_device *dev,
2371 struct ieee80211_if_sta *ifsta)
2372{
2373 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2374 struct ieee80211_sta_bss *bss;
2375 struct ieee80211_sub_if_data *sdata;
2376 struct ieee80211_hw_mode *mode;
2377 u8 bssid[ETH_ALEN], *pos;
2378 int i;
0795af57 2379 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2380
2381#if 0
2382 /* Easier testing, use fixed BSSID. */
2383 memset(bssid, 0xfe, ETH_ALEN);
2384#else
2385 /* Generate random, not broadcast, locally administered BSSID. Mix in
2386 * own MAC address to make sure that devices that do not have proper
2387 * random number generator get different BSSID. */
2388 get_random_bytes(bssid, ETH_ALEN);
2389 for (i = 0; i < ETH_ALEN; i++)
2390 bssid[i] ^= dev->dev_addr[i];
2391 bssid[0] &= ~0x01;
2392 bssid[0] |= 0x02;
2393#endif
2394
0795af57
JP		 2395 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2396 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2397
2398 bss = ieee80211_rx_bss_add(dev, bssid);
2399 if (!bss)
2400 return -ENOMEM;
2401
2402 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2403 mode = local->oper_hw_mode;
2404
2405 if (local->hw.conf.beacon_int == 0)
2406 local->hw.conf.beacon_int = 100;
2407 bss->beacon_int = local->hw.conf.beacon_int;
2408 bss->hw_mode = local->hw.conf.phymode;
2409 bss->channel = local->hw.conf.channel;
2410 bss->freq = local->hw.conf.freq;
2411 bss->last_update = jiffies;
2412 bss->capability = WLAN_CAPABILITY_IBSS;
2413 if (sdata->default_key) {
2414 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2415 } else
2416 sdata->drop_unencrypted = 0;
2417 bss->supp_rates_len = mode->num_rates;
2418 pos = bss->supp_rates;
2419 for (i = 0; i < mode->num_rates; i++) {
2420 int rate = mode->rates[i].rate;
f0706e82
JB		 2421 *pos++ = (u8) (rate / 5);
2422 }
2423
2424 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2425}
2426
2427
2428static int ieee80211_sta_find_ibss(struct net_device *dev,
2429 struct ieee80211_if_sta *ifsta)
2430{
2431 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2432 struct ieee80211_sta_bss *bss;
2433 int found = 0;
2434 u8 bssid[ETH_ALEN];
2435 int active_ibss;
0795af57
JP		 2436 DECLARE_MAC_BUF(mac);
2437 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2438
2439 if (ifsta->ssid_len == 0)
2440 return -EINVAL;
2441
2442 active_ibss = ieee80211_sta_active_ibss(dev);
2443#ifdef CONFIG_MAC80211_IBSS_DEBUG
2444 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2445 dev->name, active_ibss);
2446#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2447 spin_lock_bh(&local->sta_bss_lock);
2448 list_for_each_entry(bss, &local->sta_bss_list, list) {
2449 if (ifsta->ssid_len != bss->ssid_len ||
2450 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2451 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2452 continue;
2453#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2454 printk(KERN_DEBUG " bssid=%s found\n",
2455 print_mac(mac, bss->bssid));
f0706e82
JB		 2456#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2457 memcpy(bssid, bss->bssid, ETH_ALEN);
2458 found = 1;
2459 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2460 break;
2461 }
2462 spin_unlock_bh(&local->sta_bss_lock);
2463
2464#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2465 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2466 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 2467#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2468 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2469 (bss = ieee80211_rx_bss_get(dev, bssid))) {
0795af57 2470 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2471 " based on configured SSID\n",
0795af57 2472 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2473 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2474 }
2475#ifdef CONFIG_MAC80211_IBSS_DEBUG
2476 printk(KERN_DEBUG " did not try to join ibss\n");
2477#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2478
2479 /* Selected IBSS not found in current scan results - try to scan */
2480 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2481 !ieee80211_sta_active_ibss(dev)) {
2482 mod_timer(&ifsta->timer, jiffies +
2483 IEEE80211_IBSS_MERGE_INTERVAL);
2484 } else if (time_after(jiffies, local->last_scan_completed +
2485 IEEE80211_SCAN_INTERVAL)) {
2486 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2487 "join\n", dev->name);
2488 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2489 ifsta->ssid_len);
2490 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2491 int interval = IEEE80211_SCAN_INTERVAL;
2492
2493 if (time_after(jiffies, ifsta->ibss_join_req +
2494 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2495 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 2496 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2497 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 2498 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 2499 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2500 " configured channel %d (%d MHz)\n",
2501 dev->name, local->hw.conf.channel,
2502 local->hw.conf.freq);
2503 }
2504
2505 /* No IBSS found - decrease scan interval and continue
2506 * scanning. */
2507 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2508 }
2509
2510 ifsta->state = IEEE80211_IBSS_SEARCH;
2511 mod_timer(&ifsta->timer, jiffies + interval);
2512 return 0;
2513 }
2514
2515 return 0;
2516}
2517
2518
2519int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2520{
2521 struct ieee80211_sub_if_data *sdata;
2522 struct ieee80211_if_sta *ifsta;
2523 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2524
2525 if (len > IEEE80211_MAX_SSID_LEN)
2526 return -EINVAL;
2527
2528 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2529 * not defined. */
2530 if (local->ops->conf_tx) {
2531 struct ieee80211_tx_queue_params qparam;
2532 int i;
2533
2534 memset(&qparam, 0, sizeof(qparam));
2535 /* TODO: are these ok defaults for all hw_modes? */
2536 qparam.aifs = 2;
2537 qparam.cw_min =
2538 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2539 qparam.cw_max = 1023;
2540 qparam.burst_time = 0;
2541 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2542 {
2543 local->ops->conf_tx(local_to_hw(local),
2544 i + IEEE80211_TX_QUEUE_DATA0,
2545 &qparam);
2546 }
2547 /* IBSS uses different parameters for Beacon sending */
2548 qparam.cw_min++;
2549 qparam.cw_min *= 2;
2550 qparam.cw_min--;
2551 local->ops->conf_tx(local_to_hw(local),
2552 IEEE80211_TX_QUEUE_BEACON, &qparam);
2553 }
2554
2555 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2556 ifsta = &sdata->u.sta;
2557
2558 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 2559 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2560 memcpy(ifsta->ssid, ssid, len);
2561 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2562 ifsta->ssid_len = len;
2563
d6f2da5b
JS		 2564 if (len)
2565 ifsta->flags |= IEEE80211_STA_SSID_SET;
2566 else
2567 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2568 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2569 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 2570 ifsta->ibss_join_req = jiffies;
2571 ifsta->state = IEEE80211_IBSS_SEARCH;
2572 return ieee80211_sta_find_ibss(dev, ifsta);
2573 }
2574 return 0;
2575}
2576
2577
2578int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2579{
2580 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2581 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2582 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2583 *len = ifsta->ssid_len;
2584 return 0;
2585}
2586
2587
2588int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2589{
2590 struct ieee80211_sub_if_data *sdata;
2591 struct ieee80211_if_sta *ifsta;
2592 int res;
2593
2594 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2595 ifsta = &sdata->u.sta;
2596
2597 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2598 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2599 res = ieee80211_if_config(dev);
2600 if (res) {
2601 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2602 "the low-level driver\n", dev->name);
2603 return res;
2604 }
2605 }
2606
d6f2da5b
JS		 2607 if (is_valid_ether_addr(bssid))
2608 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2609 else
d6f2da5b
JS		 2610 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2611
f0706e82
JB		 2612 return 0;
2613}
2614
2615
2616static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2617 struct ieee80211_sub_if_data *sdata,
2618 int powersave)
2619{
2620 struct sk_buff *skb;
2621 struct ieee80211_hdr *nullfunc;
2622 u16 fc;
2623
2624 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2625 if (!skb) {
2626 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2627 "frame\n", sdata->dev->name);
2628 return;
2629 }
2630 skb_reserve(skb, local->hw.extra_tx_headroom);
2631
2632 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2633 memset(nullfunc, 0, 24);
2634 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2635 IEEE80211_FCTL_TODS;
2636 if (powersave)
2637 fc |= IEEE80211_FCTL_PM;
2638 nullfunc->frame_control = cpu_to_le16(fc);
2639 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2640 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2641 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2642
2643 ieee80211_sta_tx(sdata->dev, skb, 0);
2644}
2645
2646
2647void ieee80211_scan_completed(struct ieee80211_hw *hw)
2648{
2649 struct ieee80211_local *local = hw_to_local(hw);
2650 struct net_device *dev = local->scan_dev;
2651 struct ieee80211_sub_if_data *sdata;
2652 union iwreq_data wrqu;
2653
2654 local->last_scan_completed = jiffies;
2655 wmb();
2656 local->sta_scanning = 0;
2657
2658 if (ieee80211_hw_config(local))
2659 printk(KERN_DEBUG "%s: failed to restore operational"
2660 "channel after scan\n", dev->name);
2661
4150c572
JB		 2662
2663 netif_tx_lock_bh(local->mdev);
2664 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
2665 local->ops->configure_filter(local_to_hw(local),
2666 FIF_BCN_PRBRESP_PROMISC,
2667 &local->filter_flags,
2668 local->mdev->mc_count,
2669 local->mdev->mc_list);
2670
2671 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 2672
2673 memset(&wrqu, 0, sizeof(wrqu));
2674 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2675
79010420
JB		 2676 rcu_read_lock();
2677 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 2678
2679 /* No need to wake the master device. */
2680 if (sdata->dev == local->mdev)
2681 continue;
2682
f0706e82 2683 if (sdata->type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 2684 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 2685 ieee80211_send_nullfunc(local, sdata, 0);
2686 ieee80211_sta_timer((unsigned long)sdata);
2687 }
14042cbe 2688
f0706e82
JB		 2689 netif_wake_queue(sdata->dev);
2690 }
79010420 2691 rcu_read_unlock();
f0706e82
JB		 2692
2693 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2694 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2695 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 2696 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 2697 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2698 !ieee80211_sta_active_ibss(dev)))
2699 ieee80211_sta_find_ibss(dev, ifsta);
2700 }
2701}
2702EXPORT_SYMBOL(ieee80211_scan_completed);
2703
2704void ieee80211_sta_scan_work(struct work_struct *work)
2705{
2706 struct ieee80211_local *local =
2707 container_of(work, struct ieee80211_local, scan_work.work);
2708 struct net_device *dev = local->scan_dev;
2709 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2710 struct ieee80211_hw_mode *mode;
2711 struct ieee80211_channel *chan;
2712 int skip;
2713 unsigned long next_delay = 0;
2714
2715 if (!local->sta_scanning)
2716 return;
2717
2718 switch (local->scan_state) {
2719 case SCAN_SET_CHANNEL:
2720 mode = local->scan_hw_mode;
2721 if (local->scan_hw_mode->list.next == &local->modes_list &&
2722 local->scan_channel_idx >= mode->num_channels) {
2723 ieee80211_scan_completed(local_to_hw(local));
2724 return;
2725 }
2726 skip = !(local->enabled_modes & (1 << mode->mode));
2727 chan = &mode->channels[local->scan_channel_idx];
2728 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2729 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2730 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2731 (local->hw_modes & local->enabled_modes &
2732 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2733 skip = 1;
2734
2735 if (!skip) {
2736#if 0
2737 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2738 dev->name, chan->chan, chan->freq);
2739#endif
2740
2741 local->scan_channel = chan;
2742 if (ieee80211_hw_config(local)) {
2743 printk(KERN_DEBUG "%s: failed to set channel "
2744 "%d (%d MHz) for scan\n", dev->name,
2745 chan->chan, chan->freq);
2746 skip = 1;
2747 }
2748 }
2749
2750 local->scan_channel_idx++;
2751 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2752 if (local->scan_hw_mode->list.next != &local->modes_list) {
2753 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2754 struct ieee80211_hw_mode,
2755 list);
2756 local->scan_channel_idx = 0;
2757 }
2758 }
2759
2760 if (skip)
2761 break;
2762
2763 next_delay = IEEE80211_PROBE_DELAY +
2764 usecs_to_jiffies(local->hw.channel_change_time);
2765 local->scan_state = SCAN_SEND_PROBE;
2766 break;
2767 case SCAN_SEND_PROBE:
2768 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2769 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2770 local->scan_ssid_len);
2771 next_delay = IEEE80211_CHANNEL_TIME;
2772 } else
2773 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2774 local->scan_state = SCAN_SET_CHANNEL;
2775 break;
2776 }
2777
2778 if (local->sta_scanning)
2779 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2780 next_delay);
2781}
2782
2783
2784static int ieee80211_sta_start_scan(struct net_device *dev,
2785 u8 *ssid, size_t ssid_len)
2786{
2787 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2788 struct ieee80211_sub_if_data *sdata;
2789
2790 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2791 return -EINVAL;
2792
2793 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2794 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2795 * BSSID: MACAddress
2796 * SSID
2797 * ScanType: ACTIVE, PASSIVE
2798 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2799 * a Probe frame during active scanning
2800 * ChannelList
2801 * MinChannelTime (>= ProbeDelay), in TU
2802 * MaxChannelTime: (>= MinChannelTime), in TU
2803 */
2804
2805 /* MLME-SCAN.confirm
2806 * BSSDescriptionSet
2807 * ResultCode: SUCCESS, INVALID_PARAMETERS
2808 */
2809
2810 if (local->sta_scanning) {
2811 if (local->scan_dev == dev)
2812 return 0;
2813 return -EBUSY;
2814 }
2815
2816 if (local->ops->hw_scan) {
2817 int rc = local->ops->hw_scan(local_to_hw(local),
2818 ssid, ssid_len);
2819 if (!rc) {
2820 local->sta_scanning = 1;
2821 local->scan_dev = dev;
2822 }
2823 return rc;
2824 }
2825
2826 local->sta_scanning = 1;
2827
79010420
JB		 2828 rcu_read_lock();
2829 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 2830
2831 /* Don't stop the master interface, otherwise we can't transmit
2832 * probes! */
2833 if (sdata->dev == local->mdev)
2834 continue;
2835
f0706e82
JB		 2836 netif_stop_queue(sdata->dev);
2837 if (sdata->type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 2838 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2839 ieee80211_send_nullfunc(local, sdata, 1);
2840 }
79010420 2841 rcu_read_unlock();
f0706e82
JB		 2842
2843 if (ssid) {
2844 local->scan_ssid_len = ssid_len;
2845 memcpy(local->scan_ssid, ssid, ssid_len);
2846 } else
2847 local->scan_ssid_len = 0;
2848 local->scan_state = SCAN_SET_CHANNEL;
2849 local->scan_hw_mode = list_entry(local->modes_list.next,
2850 struct ieee80211_hw_mode,
2851 list);
2852 local->scan_channel_idx = 0;
2853 local->scan_dev = dev;
2854
4150c572
JB		 2855 netif_tx_lock_bh(local->mdev);
2856 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
2857 local->ops->configure_filter(local_to_hw(local),
2858 FIF_BCN_PRBRESP_PROMISC,
2859 &local->filter_flags,
2860 local->mdev->mc_count,
2861 local->mdev->mc_list);
2862 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 2863
2864 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2865 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2866 IEEE80211_CHANNEL_TIME);
2867
2868 return 0;
2869}
2870
2871
2872int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2873{
2874 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2875 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2876 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2877
2878 if (sdata->type != IEEE80211_IF_TYPE_STA)
2879 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2880
2881 if (local->sta_scanning) {
2882 if (local->scan_dev == dev)
2883 return 0;
2884 return -EBUSY;
2885 }
2886
2887 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2888 queue_work(local->hw.workqueue, &ifsta->work);
2889 return 0;
2890}
2891
2892static char *
2893ieee80211_sta_scan_result(struct net_device *dev,
2894 struct ieee80211_sta_bss *bss,
2895 char *current_ev, char *end_buf)
2896{
2897 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2898 struct iw_event iwe;
2899
2900 if (time_after(jiffies,
2901 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2902 return current_ev;
2903
2904 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2905 return current_ev;
2906
2907 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2908 !bss->wpa_ie && !bss->rsn_ie)
2909 return current_ev;
2910
2911 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2912 (local->scan_ssid_len != bss->ssid_len ||
2913 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2914 return current_ev;
2915
2916 memset(&iwe, 0, sizeof(iwe));
2917 iwe.cmd = SIOCGIWAP;
2918 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2919 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2920 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2921 IW_EV_ADDR_LEN);
2922
2923 memset(&iwe, 0, sizeof(iwe));
2924 iwe.cmd = SIOCGIWESSID;
2925 iwe.u.data.length = bss->ssid_len;
2926 iwe.u.data.flags = 1;
2927 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2928 bss->ssid);
2929
2930 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2931 memset(&iwe, 0, sizeof(iwe));
2932 iwe.cmd = SIOCGIWMODE;
2933 if (bss->capability & WLAN_CAPABILITY_ESS)
2934 iwe.u.mode = IW_MODE_MASTER;
2935 else
2936 iwe.u.mode = IW_MODE_ADHOC;
2937 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2938 IW_EV_UINT_LEN);
2939 }
2940
2941 memset(&iwe, 0, sizeof(iwe));
2942 iwe.cmd = SIOCGIWFREQ;
2943 iwe.u.freq.m = bss->channel;
2944 iwe.u.freq.e = 0;
2945 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2946 IW_EV_FREQ_LEN);
2947 iwe.u.freq.m = bss->freq * 100000;
2948 iwe.u.freq.e = 1;
2949 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2950 IW_EV_FREQ_LEN);
2951
2952 memset(&iwe, 0, sizeof(iwe));
2953 iwe.cmd = IWEVQUAL;
2954 iwe.u.qual.qual = bss->signal;
2955 iwe.u.qual.level = bss->rssi;
2956 iwe.u.qual.noise = bss->noise;
2957 iwe.u.qual.updated = local->wstats_flags;
2958 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2959 IW_EV_QUAL_LEN);
2960
2961 memset(&iwe, 0, sizeof(iwe));
2962 iwe.cmd = SIOCGIWENCODE;
2963 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2964 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2965 else
2966 iwe.u.data.flags = IW_ENCODE_DISABLED;
2967 iwe.u.data.length = 0;
2968 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2969
2970 if (bss && bss->wpa_ie) {
2971 memset(&iwe, 0, sizeof(iwe));
2972 iwe.cmd = IWEVGENIE;
2973 iwe.u.data.length = bss->wpa_ie_len;
2974 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2975 bss->wpa_ie);
2976 }
2977
2978 if (bss && bss->rsn_ie) {
2979 memset(&iwe, 0, sizeof(iwe));
2980 iwe.cmd = IWEVGENIE;
2981 iwe.u.data.length = bss->rsn_ie_len;
2982 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2983 bss->rsn_ie);
2984 }
2985
2986 if (bss && bss->supp_rates_len > 0) {
2987 /* display all supported rates in readable format */
2988 char *p = current_ev + IW_EV_LCP_LEN;
2989 int i;
2990
2991 memset(&iwe, 0, sizeof(iwe));
2992 iwe.cmd = SIOCGIWRATE;
2993 /* Those two flags are ignored... */
2994 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2995
2996 for (i = 0; i < bss->supp_rates_len; i++) {
2997 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2998 0x7f) * 500000);
2999 p = iwe_stream_add_value(current_ev, p,
3000 end_buf, &iwe, IW_EV_PARAM_LEN);
3001 }
3002 current_ev = p;
3003 }
3004
3005 if (bss) {
3006 char *buf;
3007 buf = kmalloc(30, GFP_ATOMIC);
3008 if (buf) {
3009 memset(&iwe, 0, sizeof(iwe));
3010 iwe.cmd = IWEVCUSTOM;
3011 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3012 iwe.u.data.length = strlen(buf);
3013 current_ev = iwe_stream_add_point(current_ev, end_buf,
3014 &iwe, buf);
3015 kfree(buf);
3016 }
3017 }
3018
3019 do {
3020 char *buf;
3021
3022 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
3023 break;
3024
3025 buf = kmalloc(100, GFP_ATOMIC);
3026 if (!buf)
3027 break;
3028
3029 memset(&iwe, 0, sizeof(iwe));
3030 iwe.cmd = IWEVCUSTOM;
3031 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3032 iwe.u.data.length = strlen(buf);
3033 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3034 buf);
3035
3036 memset(&iwe, 0, sizeof(iwe));
3037 iwe.cmd = IWEVCUSTOM;
3038 sprintf(buf, "capab=0x%04x", bss->capability);
3039 iwe.u.data.length = strlen(buf);
3040 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3041 buf);
3042
3043 kfree(buf);
3044 break;
3045 } while (0);
3046
3047 return current_ev;
3048}
3049
3050
3051int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3052{
3053 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3054 char *current_ev = buf;
3055 char *end_buf = buf + len;
3056 struct ieee80211_sta_bss *bss;
3057
3058 spin_lock_bh(&local->sta_bss_lock);
3059 list_for_each_entry(bss, &local->sta_bss_list, list) {
3060 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3061 spin_unlock_bh(&local->sta_bss_lock);
3062 return -E2BIG;
3063 }
3064 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3065 end_buf);
3066 }
3067 spin_unlock_bh(&local->sta_bss_lock);
3068 return current_ev - buf;
3069}
3070
3071
3072int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3073{
3074 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3075 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3076 kfree(ifsta->extra_ie);
3077 if (len == 0) {
3078 ifsta->extra_ie = NULL;
3079 ifsta->extra_ie_len = 0;
3080 return 0;
3081 }
3082 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3083 if (!ifsta->extra_ie) {
3084 ifsta->extra_ie_len = 0;
3085 return -ENOMEM;
3086 }
3087 memcpy(ifsta->extra_ie, ie, len);
3088 ifsta->extra_ie_len = len;
3089 return 0;
3090}
3091
3092
3093struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3094 struct sk_buff *skb, u8 *bssid,
3095 u8 *addr)
3096{
3097 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3098 struct sta_info *sta;
91fa558b 3099 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3100 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3101
3102 /* TODO: Could consider removing the least recently used entry and
3103 * allow new one to be added. */
3104 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3105 if (net_ratelimit()) {
3106 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3107 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3108 }
3109 return NULL;
3110 }
3111
0795af57 3112 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3113 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3114
3115 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3116 if (!sta)
3117 return NULL;
3118
3119 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3120
3121 rate_control_rate_init(sta, local);
3122
3123 return sta; /* caller will call sta_info_put() */
3124}
3125
3126
3127int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3128{
3129 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3130 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3131
3132 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3133 dev->name, reason);
3134
3135 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3136 sdata->type != IEEE80211_IF_TYPE_IBSS)
3137 return -EINVAL;
3138
3139 ieee80211_send_deauth(dev, ifsta, reason);
3140 ieee80211_set_disassoc(dev, ifsta, 1);
3141 return 0;
3142}
3143
3144
3145int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3146{
3147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3148 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3149
3150 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3151 dev->name, reason);
3152
3153 if (sdata->type != IEEE80211_IF_TYPE_STA)
3154 return -EINVAL;
3155
d6f2da5b 3156 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3157 return -1;
3158
3159 ieee80211_send_disassoc(dev, ifsta, reason);
3160 ieee80211_set_disassoc(dev, ifsta, 0);
3161 return 0;
3162}
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