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[MAC80211]: remove tx info sw_retry_attempt member
[deliverable/linux.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
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"
34#include "hostapd_ioctl.h"
35
36#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39#define IEEE80211_ASSOC_MAX_TRIES 3
40#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
41#define IEEE80211_PROBE_INTERVAL (60 * HZ)
42#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
43#define IEEE80211_SCAN_INTERVAL (2 * HZ)
44#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
45#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
46
47#define IEEE80211_PROBE_DELAY (HZ / 33)
48#define IEEE80211_CHANNEL_TIME (HZ / 33)
49#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
50#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
51#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
52#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
53
54#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
55
56
57#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
58
59#define ERP_INFO_USE_PROTECTION BIT(1)
60
61static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
62 u8 *ssid, size_t ssid_len);
63static struct ieee80211_sta_bss *
64ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
65static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69static int ieee80211_sta_wep_configured(struct net_device *dev);
70static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76/* Parsed Information Elements */
77struct ieee802_11_elems {
5558235c 78 /* pointers to IEs */
f0706e82 79 u8 *ssid;
f0706e82 80 u8 *supp_rates;
f0706e82 81 u8 *fh_params;
f0706e82 82 u8 *ds_params;
f0706e82 83 u8 *cf_params;
f0706e82 84 u8 *tim;
f0706e82 85 u8 *ibss_params;
f0706e82 86 u8 *challenge;
f0706e82 87 u8 *wpa;
f0706e82 88 u8 *rsn;
f0706e82 89 u8 *erp_info;
f0706e82 90 u8 *ext_supp_rates;
f0706e82 91 u8 *wmm_info;
f0706e82 92 u8 *wmm_param;
5558235c
JB		 93
94 /* length of them, respectively */
95 u8 ssid_len;
96 u8 supp_rates_len;
97 u8 fh_params_len;
98 u8 ds_params_len;
99 u8 cf_params_len;
100 u8 tim_len;
101 u8 ibss_params_len;
102 u8 challenge_len;
103 u8 wpa_len;
104 u8 rsn_len;
105 u8 erp_info_len;
106 u8 ext_supp_rates_len;
107 u8 wmm_info_len;
f0706e82
JB		 108 u8 wmm_param_len;
109};
110
111typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
112
113
114static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
115 struct ieee802_11_elems *elems)
116{
117 size_t left = len;
118 u8 *pos = start;
119 int unknown = 0;
120
121 memset(elems, 0, sizeof(*elems));
122
123 while (left >= 2) {
124 u8 id, elen;
125
126 id = *pos++;
127 elen = *pos++;
128 left -= 2;
129
130 if (elen > left) {
131#if 0
132 if (net_ratelimit())
133 printk(KERN_DEBUG "IEEE 802.11 element parse "
134 "failed (id=%d elen=%d left=%d)\n",
135 id, elen, left);
136#endif
137 return ParseFailed;
138 }
139
140 switch (id) {
141 case WLAN_EID_SSID:
142 elems->ssid = pos;
143 elems->ssid_len = elen;
144 break;
145 case WLAN_EID_SUPP_RATES:
146 elems->supp_rates = pos;
147 elems->supp_rates_len = elen;
148 break;
149 case WLAN_EID_FH_PARAMS:
150 elems->fh_params = pos;
151 elems->fh_params_len = elen;
152 break;
153 case WLAN_EID_DS_PARAMS:
154 elems->ds_params = pos;
155 elems->ds_params_len = elen;
156 break;
157 case WLAN_EID_CF_PARAMS:
158 elems->cf_params = pos;
159 elems->cf_params_len = elen;
160 break;
161 case WLAN_EID_TIM:
162 elems->tim = pos;
163 elems->tim_len = elen;
164 break;
165 case WLAN_EID_IBSS_PARAMS:
166 elems->ibss_params = pos;
167 elems->ibss_params_len = elen;
168 break;
169 case WLAN_EID_CHALLENGE:
170 elems->challenge = pos;
171 elems->challenge_len = elen;
172 break;
173 case WLAN_EID_WPA:
174 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
175 pos[2] == 0xf2) {
176 /* Microsoft OUI (00:50:F2) */
177 if (pos[3] == 1) {
178 /* OUI Type 1 - WPA IE */
179 elems->wpa = pos;
180 elems->wpa_len = elen;
181 } else if (elen >= 5 && pos[3] == 2) {
182 if (pos[4] == 0) {
183 elems->wmm_info = pos;
184 elems->wmm_info_len = elen;
185 } else if (pos[4] == 1) {
186 elems->wmm_param = pos;
187 elems->wmm_param_len = elen;
188 }
189 }
190 }
191 break;
192 case WLAN_EID_RSN:
193 elems->rsn = pos;
194 elems->rsn_len = elen;
195 break;
196 case WLAN_EID_ERP_INFO:
197 elems->erp_info = pos;
198 elems->erp_info_len = elen;
199 break;
200 case WLAN_EID_EXT_SUPP_RATES:
201 elems->ext_supp_rates = pos;
202 elems->ext_supp_rates_len = elen;
203 break;
204 default:
205#if 0
206 printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
207 "unknown element (id=%d elen=%d)\n",
208 id, elen);
209#endif
210 unknown++;
211 break;
212 }
213
214 left -= elen;
215 pos += elen;
216 }
217
218 /* Do not trigger error if left == 1 as Apple Airport base stations
219 * send AssocResps that are one spurious byte too long. */
220
221 return unknown ? ParseUnknown : ParseOK;
222}
223
224
225
226
227static int ecw2cw(int ecw)
228{
229 int cw = 1;
230 while (ecw > 0) {
231 cw <<= 1;
232 ecw--;
233 }
234 return cw - 1;
235}
236
f0706e82
JB		 237static void ieee80211_sta_wmm_params(struct net_device *dev,
238 struct ieee80211_if_sta *ifsta,
239 u8 *wmm_param, size_t wmm_param_len)
240{
241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
242 struct ieee80211_tx_queue_params params;
243 size_t left;
244 int count;
245 u8 *pos;
246
247 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
248 return;
249 count = wmm_param[6] & 0x0f;
250 if (count == ifsta->wmm_last_param_set)
251 return;
252 ifsta->wmm_last_param_set = count;
253
254 pos = wmm_param + 8;
255 left = wmm_param_len - 8;
256
257 memset(&params, 0, sizeof(params));
258
259 if (!local->ops->conf_tx)
260 return;
261
262 local->wmm_acm = 0;
263 for (; left >= 4; left -= 4, pos += 4) {
264 int aci = (pos[0] >> 5) & 0x03;
265 int acm = (pos[0] >> 4) & 0x01;
266 int queue;
267
268 switch (aci) {
269 case 1:
270 queue = IEEE80211_TX_QUEUE_DATA3;
271 if (acm) {
272 local->wmm_acm |= BIT(0) | BIT(3);
273 }
274 break;
275 case 2:
276 queue = IEEE80211_TX_QUEUE_DATA1;
277 if (acm) {
278 local->wmm_acm |= BIT(4) | BIT(5);
279 }
280 break;
281 case 3:
282 queue = IEEE80211_TX_QUEUE_DATA0;
283 if (acm) {
284 local->wmm_acm |= BIT(6) | BIT(7);
285 }
286 break;
287 case 0:
288 default:
289 queue = IEEE80211_TX_QUEUE_DATA2;
290 if (acm) {
291 local->wmm_acm |= BIT(1) | BIT(2);
292 }
293 break;
294 }
295
296 params.aifs = pos[0] & 0x0f;
297 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
298 params.cw_min = ecw2cw(pos[1] & 0x0f);
299 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
300 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
301 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
302 "cWmin=%d cWmax=%d burst=%d\n",
303 dev->name, queue, aci, acm, params.aifs, params.cw_min,
304 params.cw_max, params.burst_time);
305 /* TODO: handle ACM (block TX, fallback to next lowest allowed
306 * AC for now) */
307 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
308 printk(KERN_DEBUG "%s: failed to set TX queue "
309 "parameters for queue %d\n", dev->name, queue);
310 }
311 }
312}
313
314
5628221c
DD		 315static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
316{
5628221c
DD		 317 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
318 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
319 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 320 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 321 u8 changes = 0;
0795af57 322 DECLARE_MAC_BUF(mac);
5628221c 323
13262ffd 324 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
5628221c
DD		 325 if (net_ratelimit()) {
326 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 327 "%s)\n",
5628221c
DD		 328 dev->name,
329 use_protection ? "enabled" : "disabled",
0795af57 330 print_mac(mac, ifsta->bssid));
5628221c 331 }
13262ffd
JS		 332 if (use_protection)
333 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
334 else
335 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
d9430a32 336 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 337 }
7e9ed188 338
13262ffd 339 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
7e9ed188
DD		 340 if (net_ratelimit()) {
341 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 342 " (BSSID=%s)\n",
7e9ed188
DD		 343 dev->name,
344 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
345 "short" : "long",
0795af57 346 print_mac(mac, ifsta->bssid));
7e9ed188 347 }
13262ffd
JS		 348 if (preamble_mode)
349 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
350 else
351 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
d9430a32 352 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 353 }
d9430a32
DD		 354
355 if (changes)
356 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 357}
358
359
f0706e82
JB		 360static void ieee80211_sta_send_associnfo(struct net_device *dev,
361 struct ieee80211_if_sta *ifsta)
362{
363 char *buf;
364 size_t len;
365 int i;
366 union iwreq_data wrqu;
367
368 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
369 return;
370
371 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 372 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 373 if (!buf)
374 return;
375
376 len = sprintf(buf, "ASSOCINFO(");
377 if (ifsta->assocreq_ies) {
378 len += sprintf(buf + len, "ReqIEs=");
379 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
380 len += sprintf(buf + len, "%02x",
381 ifsta->assocreq_ies[i]);
382 }
383 }
384 if (ifsta->assocresp_ies) {
385 if (ifsta->assocreq_ies)
386 len += sprintf(buf + len, " ");
387 len += sprintf(buf + len, "RespIEs=");
388 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
389 len += sprintf(buf + len, "%02x",
390 ifsta->assocresp_ies[i]);
391 }
392 }
393 len += sprintf(buf + len, ")");
394
395 if (len > IW_CUSTOM_MAX) {
396 len = sprintf(buf, "ASSOCRESPIE=");
397 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
398 len += sprintf(buf + len, "%02x",
399 ifsta->assocresp_ies[i]);
400 }
401 }
402
403 memset(&wrqu, 0, sizeof(wrqu));
404 wrqu.data.length = len;
405 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
406
407 kfree(buf);
408}
409
410
411static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b
JS		 412 struct ieee80211_if_sta *ifsta,
413 unsigned int assoc)
f0706e82
JB		 414{
415 union iwreq_data wrqu;
416
d6f2da5b 417 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
f0706e82
JB		 418 return;
419
f0706e82
JB		 420 if (assoc) {
421 struct ieee80211_sub_if_data *sdata;
5628221c 422 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 423
424 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
425
f0706e82
JB		 426 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
427 if (sdata->type != IEEE80211_IF_TYPE_STA)
428 return;
5628221c
DD		 429
430 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
431 if (bss) {
432 if (bss->has_erp_value)
433 ieee80211_handle_erp_ie(dev, bss->erp_value);
434 ieee80211_rx_bss_put(dev, bss);
435 }
436
f0706e82 437 netif_carrier_on(dev);
d6f2da5b 438 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 439 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
440 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
441 ieee80211_sta_send_associnfo(dev, ifsta);
442 } else {
d6f2da5b
JS		 443 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
444
f0706e82 445 netif_carrier_off(dev);
d9430a32 446 ieee80211_reset_erp_info(dev);
f0706e82
JB		 447 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
448 }
449 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
450 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
451 ifsta->last_probe = jiffies;
452}
453
454static void ieee80211_set_disassoc(struct net_device *dev,
455 struct ieee80211_if_sta *ifsta, int deauth)
456{
457 if (deauth)
458 ifsta->auth_tries = 0;
459 ifsta->assoc_tries = 0;
460 ieee80211_set_associated(dev, ifsta, 0);
461}
462
463static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
464 int encrypt)
465{
466 struct ieee80211_sub_if_data *sdata;
467 struct ieee80211_tx_packet_data *pkt_data;
468
469 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
470 skb->dev = sdata->local->mdev;
471 skb_set_mac_header(skb, 0);
472 skb_set_network_header(skb, 0);
473 skb_set_transport_header(skb, 0);
474
475 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
476 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
477 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 478 if (sdata->type == IEEE80211_IF_TYPE_MGMT)
479 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
480 if (!encrypt)
481 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 482
483 dev_queue_xmit(skb);
484}
485
486
487static void ieee80211_send_auth(struct net_device *dev,
488 struct ieee80211_if_sta *ifsta,
489 int transaction, u8 *extra, size_t extra_len,
490 int encrypt)
491{
492 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
493 struct sk_buff *skb;
494 struct ieee80211_mgmt *mgmt;
495
496 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
497 sizeof(*mgmt) + 6 + extra_len);
498 if (!skb) {
499 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
500 "frame\n", dev->name);
501 return;
502 }
503 skb_reserve(skb, local->hw.extra_tx_headroom);
504
505 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
506 memset(mgmt, 0, 24 + 6);
507 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
508 IEEE80211_STYPE_AUTH);
509 if (encrypt)
510 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
511 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
512 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
513 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
514 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
515 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
516 ifsta->auth_transaction = transaction + 1;
517 mgmt->u.auth.status_code = cpu_to_le16(0);
518 if (extra)
519 memcpy(skb_put(skb, extra_len), extra, extra_len);
520
521 ieee80211_sta_tx(dev, skb, encrypt);
522}
523
524
525static void ieee80211_authenticate(struct net_device *dev,
526 struct ieee80211_if_sta *ifsta)
527{
0795af57
JP		 528 DECLARE_MAC_BUF(mac);
529
f0706e82
JB		 530 ifsta->auth_tries++;
531 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 532 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 533 " timed out\n",
0795af57 534 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 535 ifsta->state = IEEE80211_DISABLED;
536 return;
537 }
538
539 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 540 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
541 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 542
543 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
544
545 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
546}
547
548
549static void ieee80211_send_assoc(struct net_device *dev,
550 struct ieee80211_if_sta *ifsta)
551{
552 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
553 struct ieee80211_hw_mode *mode;
554 struct sk_buff *skb;
555 struct ieee80211_mgmt *mgmt;
556 u8 *pos, *ies;
557 int i, len;
558 u16 capab;
559 struct ieee80211_sta_bss *bss;
560 int wmm = 0;
561
562 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
563 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
564 ifsta->ssid_len);
565 if (!skb) {
566 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
567 "frame\n", dev->name);
568 return;
569 }
570 skb_reserve(skb, local->hw.extra_tx_headroom);
571
572 mode = local->oper_hw_mode;
573 capab = ifsta->capab;
574 if (mode->mode == MODE_IEEE80211G) {
575 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
576 WLAN_CAPABILITY_SHORT_PREAMBLE;
577 }
578 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
579 if (bss) {
580 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
581 capab |= WLAN_CAPABILITY_PRIVACY;
582 if (bss->wmm_ie) {
583 wmm = 1;
584 }
585 ieee80211_rx_bss_put(dev, bss);
586 }
587
588 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
589 memset(mgmt, 0, 24);
590 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
591 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
592 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
593
d6f2da5b 594 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 595 skb_put(skb, 10);
596 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
597 IEEE80211_STYPE_REASSOC_REQ);
598 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
599 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
600 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
601 ETH_ALEN);
602 } else {
603 skb_put(skb, 4);
604 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
605 IEEE80211_STYPE_ASSOC_REQ);
606 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
607 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
608 }
609
610 /* SSID */
611 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
612 *pos++ = WLAN_EID_SSID;
613 *pos++ = ifsta->ssid_len;
614 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
615
616 len = mode->num_rates;
617 if (len > 8)
618 len = 8;
619 pos = skb_put(skb, len + 2);
620 *pos++ = WLAN_EID_SUPP_RATES;
621 *pos++ = len;
622 for (i = 0; i < len; i++) {
623 int rate = mode->rates[i].rate;
f0706e82
JB		 624 *pos++ = (u8) (rate / 5);
625 }
626
627 if (mode->num_rates > len) {
628 pos = skb_put(skb, mode->num_rates - len + 2);
629 *pos++ = WLAN_EID_EXT_SUPP_RATES;
630 *pos++ = mode->num_rates - len;
631 for (i = len; i < mode->num_rates; i++) {
632 int rate = mode->rates[i].rate;
f0706e82
JB		 633 *pos++ = (u8) (rate / 5);
634 }
635 }
636
637 if (ifsta->extra_ie) {
638 pos = skb_put(skb, ifsta->extra_ie_len);
639 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
640 }
641
d6f2da5b 642 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 643 pos = skb_put(skb, 9);
644 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
645 *pos++ = 7; /* len */
646 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
647 *pos++ = 0x50;
648 *pos++ = 0xf2;
649 *pos++ = 2; /* WME */
650 *pos++ = 0; /* WME info */
651 *pos++ = 1; /* WME ver */
652 *pos++ = 0;
653 }
654
655 kfree(ifsta->assocreq_ies);
656 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 657 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 658 if (ifsta->assocreq_ies)
659 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
660
661 ieee80211_sta_tx(dev, skb, 0);
662}
663
664
665static void ieee80211_send_deauth(struct net_device *dev,
666 struct ieee80211_if_sta *ifsta, u16 reason)
667{
668 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
669 struct sk_buff *skb;
670 struct ieee80211_mgmt *mgmt;
671
672 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
673 if (!skb) {
674 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
675 "frame\n", dev->name);
676 return;
677 }
678 skb_reserve(skb, local->hw.extra_tx_headroom);
679
680 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
681 memset(mgmt, 0, 24);
682 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
683 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
684 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
685 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
686 IEEE80211_STYPE_DEAUTH);
687 skb_put(skb, 2);
688 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
689
690 ieee80211_sta_tx(dev, skb, 0);
691}
692
693
694static void ieee80211_send_disassoc(struct net_device *dev,
695 struct ieee80211_if_sta *ifsta, u16 reason)
696{
697 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
698 struct sk_buff *skb;
699 struct ieee80211_mgmt *mgmt;
700
701 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
702 if (!skb) {
703 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
704 "frame\n", dev->name);
705 return;
706 }
707 skb_reserve(skb, local->hw.extra_tx_headroom);
708
709 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
710 memset(mgmt, 0, 24);
711 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
712 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
713 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
714 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
715 IEEE80211_STYPE_DISASSOC);
716 skb_put(skb, 2);
717 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
718
719 ieee80211_sta_tx(dev, skb, 0);
720}
721
722
723static int ieee80211_privacy_mismatch(struct net_device *dev,
724 struct ieee80211_if_sta *ifsta)
725{
726 struct ieee80211_sta_bss *bss;
727 int res = 0;
728
d6f2da5b
JS		 729 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL) ||
730 ifsta->key_management_enabled)
f0706e82
JB		 731 return 0;
732
733 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
734 if (!bss)
735 return 0;
736
737 if (ieee80211_sta_wep_configured(dev) !=
738 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
739 res = 1;
740
741 ieee80211_rx_bss_put(dev, bss);
742
743 return res;
744}
745
746
747static void ieee80211_associate(struct net_device *dev,
748 struct ieee80211_if_sta *ifsta)
749{
0795af57
JP		 750 DECLARE_MAC_BUF(mac);
751
f0706e82
JB		 752 ifsta->assoc_tries++;
753 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 754 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 755 " timed out\n",
0795af57 756 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 757 ifsta->state = IEEE80211_DISABLED;
758 return;
759 }
760
761 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 762 printk(KERN_DEBUG "%s: associate with AP %s\n",
763 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 764 if (ieee80211_privacy_mismatch(dev, ifsta)) {
765 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
766 "mixed-cell disabled - abort association\n", dev->name);
767 ifsta->state = IEEE80211_DISABLED;
768 return;
769 }
770
771 ieee80211_send_assoc(dev, ifsta);
772
773 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
774}
775
776
777static void ieee80211_associated(struct net_device *dev,
778 struct ieee80211_if_sta *ifsta)
779{
780 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
781 struct sta_info *sta;
782 int disassoc;
0795af57 783 DECLARE_MAC_BUF(mac);
f0706e82
JB		 784
785 /* TODO: start monitoring current AP signal quality and number of
786 * missed beacons. Scan other channels every now and then and search
787 * for better APs. */
788 /* TODO: remove expired BSSes */
789
790 ifsta->state = IEEE80211_ASSOCIATED;
791
792 sta = sta_info_get(local, ifsta->bssid);
793 if (!sta) {
0795af57
JP		 794 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
795 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 796 disassoc = 1;
797 } else {
798 disassoc = 0;
799 if (time_after(jiffies,
800 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 801 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 802 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 803 "current AP %s - assume out of "
f0706e82 804 "range\n",
0795af57 805 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 806 disassoc = 1;
be8755e1 807 sta_info_free(sta);
d6f2da5b 808 } else
f0706e82
JB		 809 ieee80211_send_probe_req(dev, ifsta->bssid,
810 local->scan_ssid,
811 local->scan_ssid_len);
d6f2da5b 812 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 813 } else {
d6f2da5b 814 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 815 if (time_after(jiffies, ifsta->last_probe +
816 IEEE80211_PROBE_INTERVAL)) {
817 ifsta->last_probe = jiffies;
818 ieee80211_send_probe_req(dev, ifsta->bssid,
819 ifsta->ssid,
820 ifsta->ssid_len);
821 }
822 }
823 sta_info_put(sta);
824 }
825 if (disassoc) {
826 union iwreq_data wrqu;
827 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
828 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
829 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
830 mod_timer(&ifsta->timer, jiffies +
831 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
832 } else {
833 mod_timer(&ifsta->timer, jiffies +
834 IEEE80211_MONITORING_INTERVAL);
835 }
836}
837
838
839static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
840 u8 *ssid, size_t ssid_len)
841{
842 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
843 struct ieee80211_hw_mode *mode;
844 struct sk_buff *skb;
845 struct ieee80211_mgmt *mgmt;
846 u8 *pos, *supp_rates, *esupp_rates = NULL;
847 int i;
848
849 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
850 if (!skb) {
851 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
852 "request\n", dev->name);
853 return;
854 }
855 skb_reserve(skb, local->hw.extra_tx_headroom);
856
857 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
858 memset(mgmt, 0, 24);
859 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
860 IEEE80211_STYPE_PROBE_REQ);
861 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
862 if (dst) {
863 memcpy(mgmt->da, dst, ETH_ALEN);
864 memcpy(mgmt->bssid, dst, ETH_ALEN);
865 } else {
866 memset(mgmt->da, 0xff, ETH_ALEN);
867 memset(mgmt->bssid, 0xff, ETH_ALEN);
868 }
869 pos = skb_put(skb, 2 + ssid_len);
870 *pos++ = WLAN_EID_SSID;
871 *pos++ = ssid_len;
872 memcpy(pos, ssid, ssid_len);
873
874 supp_rates = skb_put(skb, 2);
875 supp_rates[0] = WLAN_EID_SUPP_RATES;
876 supp_rates[1] = 0;
877 mode = local->oper_hw_mode;
878 for (i = 0; i < mode->num_rates; i++) {
879 struct ieee80211_rate *rate = &mode->rates[i];
880 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
881 continue;
882 if (esupp_rates) {
883 pos = skb_put(skb, 1);
884 esupp_rates[1]++;
885 } else if (supp_rates[1] == 8) {
886 esupp_rates = skb_put(skb, 3);
887 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
888 esupp_rates[1] = 1;
889 pos = &esupp_rates[2];
890 } else {
891 pos = skb_put(skb, 1);
892 supp_rates[1]++;
893 }
b708e610 894 *pos = rate->rate / 5;
f0706e82
JB		 895 }
896
897 ieee80211_sta_tx(dev, skb, 0);
898}
899
900
901static int ieee80211_sta_wep_configured(struct net_device *dev)
902{
903 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
904 if (!sdata || !sdata->default_key ||
8f20fc24 905 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 906 return 0;
907 return 1;
908}
909
910
911static void ieee80211_auth_completed(struct net_device *dev,
912 struct ieee80211_if_sta *ifsta)
913{
914 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 915 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 916 ieee80211_associate(dev, ifsta);
917}
918
919
920static void ieee80211_auth_challenge(struct net_device *dev,
921 struct ieee80211_if_sta *ifsta,
922 struct ieee80211_mgmt *mgmt,
923 size_t len)
924{
925 u8 *pos;
926 struct ieee802_11_elems elems;
927
928 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
929 pos = mgmt->u.auth.variable;
930 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
931 == ParseFailed) {
932 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
933 dev->name);
934 return;
935 }
936 if (!elems.challenge) {
937 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
938 "frame\n", dev->name);
939 return;
940 }
941 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
942 elems.challenge_len + 2, 1);
943}
944
945
946static void ieee80211_rx_mgmt_auth(struct net_device *dev,
947 struct ieee80211_if_sta *ifsta,
948 struct ieee80211_mgmt *mgmt,
949 size_t len)
950{
951 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
952 u16 auth_alg, auth_transaction, status_code;
0795af57 953 DECLARE_MAC_BUF(mac);
f0706e82
JB		 954
955 if (ifsta->state != IEEE80211_AUTHENTICATE &&
956 sdata->type != IEEE80211_IF_TYPE_IBSS) {
957 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 958 "%s, but not in authenticate state - ignored\n",
959 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 960 return;
961 }
962
963 if (len < 24 + 6) {
964 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 965 "received from %s - ignored\n",
966 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 967 return;
968 }
969
970 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
971 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
972 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 973 "unknown AP (SA=%s BSSID=%s) - "
974 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
975 print_mac(mac, mgmt->bssid));
f0706e82
JB		 976 return;
977 }
978
979 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
980 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
981 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 982 "unknown BSSID (SA=%s BSSID=%s) - "
983 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
984 print_mac(mac, mgmt->bssid));
f0706e82
JB		 985 return;
986 }
987
988 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
989 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
990 status_code = le16_to_cpu(mgmt->u.auth.status_code);
991
0795af57 992 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 993 "transaction=%d status=%d)\n",
0795af57 994 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 995 auth_transaction, status_code);
996
997 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
998 /* IEEE 802.11 standard does not require authentication in IBSS
999 * networks and most implementations do not seem to use it.
1000 * However, try to reply to authentication attempts if someone
1001 * has actually implemented this.
1002 * TODO: Could implement shared key authentication. */
1003 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1004 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1005 "frame (alg=%d transaction=%d)\n",
1006 dev->name, auth_alg, auth_transaction);
1007 return;
1008 }
1009 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1010 }
1011
1012 if (auth_alg != ifsta->auth_alg ||
1013 auth_transaction != ifsta->auth_transaction) {
1014 printk(KERN_DEBUG "%s: unexpected authentication frame "
1015 "(alg=%d transaction=%d)\n",
1016 dev->name, auth_alg, auth_transaction);
1017 return;
1018 }
1019
1020 if (status_code != WLAN_STATUS_SUCCESS) {
1021 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1022 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1023 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1024 u8 algs[3];
1025 const int num_algs = ARRAY_SIZE(algs);
1026 int i, pos;
1027 algs[0] = algs[1] = algs[2] = 0xff;
1028 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1029 algs[0] = WLAN_AUTH_OPEN;
1030 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1031 algs[1] = WLAN_AUTH_SHARED_KEY;
1032 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1033 algs[2] = WLAN_AUTH_LEAP;
1034 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1035 pos = 0;
1036 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1037 pos = 1;
1038 else
1039 pos = 2;
1040 for (i = 0; i < num_algs; i++) {
1041 pos++;
1042 if (pos >= num_algs)
1043 pos = 0;
1044 if (algs[pos] == ifsta->auth_alg ||
1045 algs[pos] == 0xff)
1046 continue;
1047 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1048 !ieee80211_sta_wep_configured(dev))
1049 continue;
1050 ifsta->auth_alg = algs[pos];
1051 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1052 "next try\n",
1053 dev->name, ifsta->auth_alg);
1054 break;
1055 }
1056 }
1057 return;
1058 }
1059
1060 switch (ifsta->auth_alg) {
1061 case WLAN_AUTH_OPEN:
1062 case WLAN_AUTH_LEAP:
1063 ieee80211_auth_completed(dev, ifsta);
1064 break;
1065 case WLAN_AUTH_SHARED_KEY:
1066 if (ifsta->auth_transaction == 4)
1067 ieee80211_auth_completed(dev, ifsta);
1068 else
1069 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1070 break;
1071 }
1072}
1073
1074
1075static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1076 struct ieee80211_if_sta *ifsta,
1077 struct ieee80211_mgmt *mgmt,
1078 size_t len)
1079{
1080 u16 reason_code;
0795af57 1081 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1082
1083 if (len < 24 + 2) {
1084 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1085 "received from %s - ignored\n",
1086 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1087 return;
1088 }
1089
1090 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1091 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1092 "unknown AP (SA=%s BSSID=%s) - "
1093 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1094 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1095 return;
1096 }
1097
1098 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1099
0795af57 1100 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1101 " (reason=%d)\n",
0795af57 1102 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1103
d6f2da5b 1104 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1105 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1106 }
1107
1108 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1109 ifsta->state == IEEE80211_ASSOCIATE ||
1110 ifsta->state == IEEE80211_ASSOCIATED) {
1111 ifsta->state = IEEE80211_AUTHENTICATE;
1112 mod_timer(&ifsta->timer, jiffies +
1113 IEEE80211_RETRY_AUTH_INTERVAL);
1114 }
1115
1116 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1117 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1118}
1119
1120
1121static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1122 struct ieee80211_if_sta *ifsta,
1123 struct ieee80211_mgmt *mgmt,
1124 size_t len)
1125{
1126 u16 reason_code;
0795af57 1127 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1128
1129 if (len < 24 + 2) {
1130 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1131 "received from %s - ignored\n",
1132 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1133 return;
1134 }
1135
1136 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1137 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1138 "unknown AP (SA=%s BSSID=%s) - "
1139 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1140 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1141 return;
1142 }
1143
1144 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1145
0795af57 1146 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1147 " (reason=%d)\n",
0795af57 1148 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1149
d6f2da5b 1150 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1151 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1152
1153 if (ifsta->state == IEEE80211_ASSOCIATED) {
1154 ifsta->state = IEEE80211_ASSOCIATE;
1155 mod_timer(&ifsta->timer, jiffies +
1156 IEEE80211_RETRY_AUTH_INTERVAL);
1157 }
1158
1159 ieee80211_set_disassoc(dev, ifsta, 0);
1160}
1161
1162
1163static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1164 struct ieee80211_if_sta *ifsta,
1165 struct ieee80211_mgmt *mgmt,
1166 size_t len,
1167 int reassoc)
1168{
1169 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1170 struct ieee80211_hw_mode *mode;
1171 struct sta_info *sta;
1172 u32 rates;
1173 u16 capab_info, status_code, aid;
1174 struct ieee802_11_elems elems;
1175 u8 *pos;
1176 int i, j;
0795af57 1177 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1178
1179 /* AssocResp and ReassocResp have identical structure, so process both
1180 * of them in this function. */
1181
1182 if (ifsta->state != IEEE80211_ASSOCIATE) {
1183 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1184 "%s, but not in associate state - ignored\n",
1185 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1186 return;
1187 }
1188
1189 if (len < 24 + 6) {
1190 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1191 "received from %s - ignored\n",
1192 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1193 return;
1194 }
1195
1196 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1197 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1198 "unknown AP (SA=%s BSSID=%s) - "
1199 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1200 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1201 return;
1202 }
1203
1204 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1205 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1206 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1207 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1208 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1209 "set\n", dev->name, aid);
1210 aid &= ~(BIT(15) | BIT(14));
1211
0795af57 1212 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1213 "status=%d aid=%d)\n",
0795af57 1214 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
f0706e82
JB		 1215 capab_info, status_code, aid);
1216
1217 if (status_code != WLAN_STATUS_SUCCESS) {
1218 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1219 dev->name, status_code);
8a69aa93
DD		 1220 /* if this was a reassociation, ensure we try a "full"
1221 * association next time. This works around some broken APs
1222 * which do not correctly reject reassociation requests. */
d6f2da5b 1223 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1224 return;
1225 }
1226
1227 pos = mgmt->u.assoc_resp.variable;
1228 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1229 == ParseFailed) {
1230 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1231 dev->name);
1232 return;
1233 }
1234
1235 if (!elems.supp_rates) {
1236 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1237 dev->name);
1238 return;
1239 }
1240
5628221c
DD		 1241 /* it probably doesn't, but if the frame includes an ERP value then
1242 * update our stored copy */
1243 if (elems.erp_info && elems.erp_info_len >= 1) {
1244 struct ieee80211_sta_bss *bss
1245 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1246 if (bss) {
1247 bss->erp_value = elems.erp_info[0];
1248 bss->has_erp_value = 1;
1249 ieee80211_rx_bss_put(dev, bss);
1250 }
1251 }
1252
f0706e82
JB		 1253 printk(KERN_DEBUG "%s: associated\n", dev->name);
1254 ifsta->aid = aid;
1255 ifsta->ap_capab = capab_info;
1256
1257 kfree(ifsta->assocresp_ies);
1258 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1259 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1260 if (ifsta->assocresp_ies)
1261 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1262
1263 ieee80211_set_associated(dev, ifsta, 1);
1264
1265 /* Add STA entry for the AP */
1266 sta = sta_info_get(local, ifsta->bssid);
1267 if (!sta) {
1268 struct ieee80211_sta_bss *bss;
0ec0b7ac 1269 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1270 if (!sta) {
1271 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1272 " AP\n", dev->name);
1273 return;
1274 }
1275 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1276 if (bss) {
1277 sta->last_rssi = bss->rssi;
1278 sta->last_signal = bss->signal;
1279 sta->last_noise = bss->noise;
1280 ieee80211_rx_bss_put(dev, bss);
1281 }
1282 }
1283
1284 sta->dev = dev;
c9ee23df 1285 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1286
1287 rates = 0;
1288 mode = local->oper_hw_mode;
1289 for (i = 0; i < elems.supp_rates_len; i++) {
1290 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1291 for (j = 0; j < mode->num_rates; j++)
1292 if (mode->rates[j].rate == rate)
1293 rates |= BIT(j);
1294 }
1295 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1296 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1297 for (j = 0; j < mode->num_rates; j++)
1298 if (mode->rates[j].rate == rate)
1299 rates |= BIT(j);
1300 }
1301 sta->supp_rates = rates;
1302
1303 rate_control_rate_init(sta, local);
1304
d6f2da5b 1305 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1306 sta->flags |= WLAN_STA_WME;
1307 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1308 elems.wmm_param_len);
1309 }
1310
1311
1312 sta_info_put(sta);
1313
1314 ieee80211_associated(dev, ifsta);
1315}
1316
1317
1318/* Caller must hold local->sta_bss_lock */
1319static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1320 struct ieee80211_sta_bss *bss)
1321{
1322 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1323 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1324 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1325}
1326
1327
1328/* Caller must hold local->sta_bss_lock */
1329static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1330 struct ieee80211_sta_bss *bss)
1331{
1332 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1333 struct ieee80211_sta_bss *b, *prev = NULL;
1334 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1335 while (b) {
1336 if (b == bss) {
1337 if (!prev)
1338 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1339 bss->hnext;
1340 else
1341 prev->hnext = bss->hnext;
1342 break;
1343 }
1344 prev = b;
1345 b = b->hnext;
1346 }
1347}
1348
1349
1350static struct ieee80211_sta_bss *
1351ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1352{
1353 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1354 struct ieee80211_sta_bss *bss;
1355
dd00cc48 1356 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1357 if (!bss)
1358 return NULL;
f0706e82
JB		 1359 atomic_inc(&bss->users);
1360 atomic_inc(&bss->users);
1361 memcpy(bss->bssid, bssid, ETH_ALEN);
1362
1363 spin_lock_bh(&local->sta_bss_lock);
1364 /* TODO: order by RSSI? */
1365 list_add_tail(&bss->list, &local->sta_bss_list);
1366 __ieee80211_rx_bss_hash_add(dev, bss);
1367 spin_unlock_bh(&local->sta_bss_lock);
1368 return bss;
1369}
1370
1371
1372static struct ieee80211_sta_bss *
1373ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1374{
1375 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1376 struct ieee80211_sta_bss *bss;
1377
1378 spin_lock_bh(&local->sta_bss_lock);
1379 bss = local->sta_bss_hash[STA_HASH(bssid)];
1380 while (bss) {
1381 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1382 atomic_inc(&bss->users);
1383 break;
1384 }
1385 bss = bss->hnext;
1386 }
1387 spin_unlock_bh(&local->sta_bss_lock);
1388 return bss;
1389}
1390
1391
1392static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1393{
1394 kfree(bss->wpa_ie);
1395 kfree(bss->rsn_ie);
1396 kfree(bss->wmm_ie);
1397 kfree(bss);
1398}
1399
1400
1401static void ieee80211_rx_bss_put(struct net_device *dev,
1402 struct ieee80211_sta_bss *bss)
1403{
1404 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1405 if (!atomic_dec_and_test(&bss->users))
1406 return;
1407
1408 spin_lock_bh(&local->sta_bss_lock);
1409 __ieee80211_rx_bss_hash_del(dev, bss);
1410 list_del(&bss->list);
1411 spin_unlock_bh(&local->sta_bss_lock);
1412 ieee80211_rx_bss_free(bss);
1413}
1414
1415
1416void ieee80211_rx_bss_list_init(struct net_device *dev)
1417{
1418 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1419 spin_lock_init(&local->sta_bss_lock);
1420 INIT_LIST_HEAD(&local->sta_bss_list);
1421}
1422
1423
1424void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1425{
1426 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1427 struct ieee80211_sta_bss *bss, *tmp;
1428
1429 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1430 ieee80211_rx_bss_put(dev, bss);
1431}
1432
1433
1434static void ieee80211_rx_bss_info(struct net_device *dev,
1435 struct ieee80211_mgmt *mgmt,
1436 size_t len,
1437 struct ieee80211_rx_status *rx_status,
1438 int beacon)
1439{
1440 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1441 struct ieee802_11_elems elems;
1442 size_t baselen;
1443 int channel, invalid = 0, clen;
1444 struct ieee80211_sta_bss *bss;
1445 struct sta_info *sta;
1446 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1447 u64 timestamp;
0795af57
JP		 1448 DECLARE_MAC_BUF(mac);
1449 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 1450
1451 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1452 return; /* ignore ProbeResp to foreign address */
1453
1454#if 0
0795af57 1455 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 1456 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 1457 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 1458#endif
1459
1460 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1461 if (baselen > len)
1462 return;
1463
1464 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1465
1466 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1467 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1468#ifdef CONFIG_MAC80211_IBSS_DEBUG
1469 static unsigned long last_tsf_debug = 0;
1470 u64 tsf;
1471 if (local->ops->get_tsf)
1472 tsf = local->ops->get_tsf(local_to_hw(local));
1473 else
1474 tsf = -1LLU;
1475 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 1476 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1477 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 1478 "@%lu\n",
0795af57 1479 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 1480 (unsigned long long)tsf,
1481 (unsigned long long)timestamp,
1482 (unsigned long long)(tsf - timestamp),
1483 jiffies);
1484 last_tsf_debug = jiffies;
1485 }
1486#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1487 }
1488
1489 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1490 &elems) == ParseFailed)
1491 invalid = 1;
1492
1493 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1494 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1495 (sta = sta_info_get(local, mgmt->sa))) {
1496 struct ieee80211_hw_mode *mode;
1497 struct ieee80211_rate *rates;
1498 size_t num_rates;
1499 u32 supp_rates, prev_rates;
1500 int i, j;
1501
1502 mode = local->sta_scanning ?
1503 local->scan_hw_mode : local->oper_hw_mode;
1504 rates = mode->rates;
1505 num_rates = mode->num_rates;
1506
1507 supp_rates = 0;
1508 for (i = 0; i < elems.supp_rates_len +
1509 elems.ext_supp_rates_len; i++) {
1510 u8 rate = 0;
1511 int own_rate;
1512 if (i < elems.supp_rates_len)
1513 rate = elems.supp_rates[i];
1514 else if (elems.ext_supp_rates)
1515 rate = elems.ext_supp_rates
1516 [i - elems.supp_rates_len];
1517 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 1518 for (j = 0; j < num_rates; j++)
1519 if (rates[j].rate == own_rate)
1520 supp_rates |= BIT(j);
1521 }
1522
1523 prev_rates = sta->supp_rates;
1524 sta->supp_rates &= supp_rates;
1525 if (sta->supp_rates == 0) {
1526 /* No matching rates - this should not really happen.
1527 * Make sure that at least one rate is marked
1528 * supported to avoid issues with TX rate ctrl. */
1529 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1530 }
1531 if (sta->supp_rates != prev_rates) {
1532 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 1533 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 1534 "0x%x)\n",
0795af57 1535 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 1536 supp_rates, sta->supp_rates);
1537 }
1538 sta_info_put(sta);
1539 }
1540
1541 if (!elems.ssid)
1542 return;
1543
1544 if (elems.ds_params && elems.ds_params_len == 1)
1545 channel = elems.ds_params[0];
1546 else
1547 channel = rx_status->channel;
1548
1549 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1550 if (!bss) {
1551 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1552 if (!bss)
1553 return;
1554 } else {
1555#if 0
1556 /* TODO: order by RSSI? */
1557 spin_lock_bh(&local->sta_bss_lock);
1558 list_move_tail(&bss->list, &local->sta_bss_list);
1559 spin_unlock_bh(&local->sta_bss_lock);
1560#endif
1561 }
1562
1563 if (bss->probe_resp && beacon) {
1564 /* Do not allow beacon to override data from Probe Response. */
1565 ieee80211_rx_bss_put(dev, bss);
1566 return;
1567 }
1568
5628221c
DD		 1569 /* save the ERP value so that it is available at association time */
1570 if (elems.erp_info && elems.erp_info_len >= 1) {
1571 bss->erp_value = elems.erp_info[0];
1572 bss->has_erp_value = 1;
1573 }
1574
f0706e82
JB		 1575 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1576 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1577 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1578 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1579 bss->ssid_len = elems.ssid_len;
1580 }
1581
1582 bss->supp_rates_len = 0;
1583 if (elems.supp_rates) {
1584 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1585 if (clen > elems.supp_rates_len)
1586 clen = elems.supp_rates_len;
1587 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1588 clen);
1589 bss->supp_rates_len += clen;
1590 }
1591 if (elems.ext_supp_rates) {
1592 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1593 if (clen > elems.ext_supp_rates_len)
1594 clen = elems.ext_supp_rates_len;
1595 memcpy(&bss->supp_rates[bss->supp_rates_len],
1596 elems.ext_supp_rates, clen);
1597 bss->supp_rates_len += clen;
1598 }
1599
1600 if (elems.wpa &&
1601 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1602 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1603 kfree(bss->wpa_ie);
1604 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1605 if (bss->wpa_ie) {
1606 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1607 bss->wpa_ie_len = elems.wpa_len + 2;
1608 } else
1609 bss->wpa_ie_len = 0;
1610 } else if (!elems.wpa && bss->wpa_ie) {
1611 kfree(bss->wpa_ie);
1612 bss->wpa_ie = NULL;
1613 bss->wpa_ie_len = 0;
1614 }
1615
1616 if (elems.rsn &&
1617 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1618 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1619 kfree(bss->rsn_ie);
1620 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1621 if (bss->rsn_ie) {
1622 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1623 bss->rsn_ie_len = elems.rsn_len + 2;
1624 } else
1625 bss->rsn_ie_len = 0;
1626 } else if (!elems.rsn && bss->rsn_ie) {
1627 kfree(bss->rsn_ie);
1628 bss->rsn_ie = NULL;
1629 bss->rsn_ie_len = 0;
1630 }
1631
1632 if (elems.wmm_param &&
1633 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1634 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1635 kfree(bss->wmm_ie);
1636 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1637 if (bss->wmm_ie) {
1638 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1639 elems.wmm_param_len + 2);
1640 bss->wmm_ie_len = elems.wmm_param_len + 2;
1641 } else
1642 bss->wmm_ie_len = 0;
1643 } else if (!elems.wmm_param && bss->wmm_ie) {
1644 kfree(bss->wmm_ie);
1645 bss->wmm_ie = NULL;
1646 bss->wmm_ie_len = 0;
1647 }
1648
1649
1650 bss->hw_mode = rx_status->phymode;
1651 bss->channel = channel;
1652 bss->freq = rx_status->freq;
1653 if (channel != rx_status->channel &&
1654 (bss->hw_mode == MODE_IEEE80211G ||
1655 bss->hw_mode == MODE_IEEE80211B) &&
1656 channel >= 1 && channel <= 14) {
1657 static const int freq_list[] = {
1658 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1659 2447, 2452, 2457, 2462, 2467, 2472, 2484
1660 };
1661 /* IEEE 802.11g/b mode can receive packets from neighboring
1662 * channels, so map the channel into frequency. */
1663 bss->freq = freq_list[channel - 1];
1664 }
1665 bss->timestamp = timestamp;
1666 bss->last_update = jiffies;
1667 bss->rssi = rx_status->ssi;
1668 bss->signal = rx_status->signal;
1669 bss->noise = rx_status->noise;
1670 if (!beacon)
1671 bss->probe_resp++;
1672 ieee80211_rx_bss_put(dev, bss);
1673}
1674
1675
1676static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1677 struct ieee80211_mgmt *mgmt,
1678 size_t len,
1679 struct ieee80211_rx_status *rx_status)
1680{
1681 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1682}
1683
1684
1685static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1686 struct ieee80211_mgmt *mgmt,
1687 size_t len,
1688 struct ieee80211_rx_status *rx_status)
1689{
f0706e82
JB		 1690 struct ieee80211_sub_if_data *sdata;
1691 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1692 size_t baselen;
1693 struct ieee802_11_elems elems;
1694
1695 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1696
1697 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1698 if (sdata->type != IEEE80211_IF_TYPE_STA)
1699 return;
1700 ifsta = &sdata->u.sta;
1701
d6f2da5b 1702 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1703 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1704 return;
1705
1706 /* Process beacon from the current BSS */
1707 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1708 if (baselen > len)
1709 return;
1710
1711 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1712 &elems) == ParseFailed)
1713 return;
1714
5628221c
DD		 1715 if (elems.erp_info && elems.erp_info_len >= 1)
1716 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82 1717
d6f2da5b 1718 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1719 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1720 elems.wmm_param_len);
1721 }
1722}
1723
1724
1725static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1726 struct ieee80211_if_sta *ifsta,
1727 struct ieee80211_mgmt *mgmt,
1728 size_t len,
1729 struct ieee80211_rx_status *rx_status)
1730{
1731 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1732 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1733 int tx_last_beacon;
1734 struct sk_buff *skb;
1735 struct ieee80211_mgmt *resp;
1736 u8 *pos, *end;
0795af57
JP		 1737 DECLARE_MAC_BUF(mac);
1738#ifdef CONFIG_MAC80211_IBSS_DEBUG
1739 DECLARE_MAC_BUF(mac2);
1740 DECLARE_MAC_BUF(mac3);
1741#endif
f0706e82
JB		 1742
1743 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1744 ifsta->state != IEEE80211_IBSS_JOINED ||
1745 len < 24 + 2 || !ifsta->probe_resp)
1746 return;
1747
1748 if (local->ops->tx_last_beacon)
1749 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1750 else
1751 tx_last_beacon = 1;
1752
1753#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1754 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1755 "%s (tx_last_beacon=%d)\n",
1756 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1757 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 1758#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1759
1760 if (!tx_last_beacon)
1761 return;
1762
1763 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1764 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1765 return;
1766
1767 end = ((u8 *) mgmt) + len;
1768 pos = mgmt->u.probe_req.variable;
1769 if (pos[0] != WLAN_EID_SSID ||
1770 pos + 2 + pos[1] > end) {
1771 if (net_ratelimit()) {
1772 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 1773 "from %s\n",
1774 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1775 }
1776 return;
1777 }
1778 if (pos[1] != 0 &&
1779 (pos[1] != ifsta->ssid_len ||
1780 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1781 /* Ignore ProbeReq for foreign SSID */
1782 return;
1783 }
1784
1785 /* Reply with ProbeResp */
0ec0b7ac 1786 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 1787 if (!skb)
1788 return;
1789
1790 resp = (struct ieee80211_mgmt *) skb->data;
1791 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1792#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 1793 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1794 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 1795#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1796 ieee80211_sta_tx(dev, skb, 0);
1797}
1798
1799
1800void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1801 struct ieee80211_rx_status *rx_status)
1802{
1803 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1804 struct ieee80211_sub_if_data *sdata;
1805 struct ieee80211_if_sta *ifsta;
1806 struct ieee80211_mgmt *mgmt;
1807 u16 fc;
1808
1809 if (skb->len < 24)
1810 goto fail;
1811
1812 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1813 ifsta = &sdata->u.sta;
1814
1815 mgmt = (struct ieee80211_mgmt *) skb->data;
1816 fc = le16_to_cpu(mgmt->frame_control);
1817
1818 switch (fc & IEEE80211_FCTL_STYPE) {
1819 case IEEE80211_STYPE_PROBE_REQ:
1820 case IEEE80211_STYPE_PROBE_RESP:
1821 case IEEE80211_STYPE_BEACON:
1822 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1823 case IEEE80211_STYPE_AUTH:
1824 case IEEE80211_STYPE_ASSOC_RESP:
1825 case IEEE80211_STYPE_REASSOC_RESP:
1826 case IEEE80211_STYPE_DEAUTH:
1827 case IEEE80211_STYPE_DISASSOC:
1828 skb_queue_tail(&ifsta->skb_queue, skb);
1829 queue_work(local->hw.workqueue, &ifsta->work);
1830 return;
1831 default:
1832 printk(KERN_DEBUG "%s: received unknown management frame - "
1833 "stype=%d\n", dev->name,
1834 (fc & IEEE80211_FCTL_STYPE) >> 4);
1835 break;
1836 }
1837
1838 fail:
1839 kfree_skb(skb);
1840}
1841
1842
1843static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1844 struct sk_buff *skb)
1845{
1846 struct ieee80211_rx_status *rx_status;
1847 struct ieee80211_sub_if_data *sdata;
1848 struct ieee80211_if_sta *ifsta;
1849 struct ieee80211_mgmt *mgmt;
1850 u16 fc;
1851
1852 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1853 ifsta = &sdata->u.sta;
1854
1855 rx_status = (struct ieee80211_rx_status *) skb->cb;
1856 mgmt = (struct ieee80211_mgmt *) skb->data;
1857 fc = le16_to_cpu(mgmt->frame_control);
1858
1859 switch (fc & IEEE80211_FCTL_STYPE) {
1860 case IEEE80211_STYPE_PROBE_REQ:
1861 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1862 rx_status);
1863 break;
1864 case IEEE80211_STYPE_PROBE_RESP:
1865 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1866 break;
1867 case IEEE80211_STYPE_BEACON:
1868 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1869 break;
1870 case IEEE80211_STYPE_AUTH:
1871 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1872 break;
1873 case IEEE80211_STYPE_ASSOC_RESP:
1874 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1875 break;
1876 case IEEE80211_STYPE_REASSOC_RESP:
1877 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1878 break;
1879 case IEEE80211_STYPE_DEAUTH:
1880 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1881 break;
1882 case IEEE80211_STYPE_DISASSOC:
1883 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1884 break;
1885 }
1886
1887 kfree_skb(skb);
1888}
1889
1890
1891void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1892 struct ieee80211_rx_status *rx_status)
1893{
1894 struct ieee80211_mgmt *mgmt;
1895 u16 fc;
1896
1897 if (skb->len < 24) {
1898 dev_kfree_skb(skb);
1899 return;
1900 }
1901
1902 mgmt = (struct ieee80211_mgmt *) skb->data;
1903 fc = le16_to_cpu(mgmt->frame_control);
1904
1905 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1906 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1907 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1908 skb->len, rx_status);
1909 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1910 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1911 rx_status);
1912 }
1913 }
1914
1915 dev_kfree_skb(skb);
1916}
1917
1918
1919static int ieee80211_sta_active_ibss(struct net_device *dev)
1920{
1921 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1922 int active = 0;
1923 struct sta_info *sta;
1924
be8755e1 1925 read_lock_bh(&local->sta_lock);
f0706e82
JB		 1926 list_for_each_entry(sta, &local->sta_list, list) {
1927 if (sta->dev == dev &&
1928 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1929 jiffies)) {
1930 active++;
1931 break;
1932 }
1933 }
be8755e1 1934 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 1935
1936 return active;
1937}
1938
1939
1940static void ieee80211_sta_expire(struct net_device *dev)
1941{
1942 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1943 struct sta_info *sta, *tmp;
be8755e1 1944 LIST_HEAD(tmp_list);
0795af57 1945 DECLARE_MAC_BUF(mac);
f0706e82 1946
be8755e1 1947 write_lock_bh(&local->sta_lock);
f0706e82
JB		 1948 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1949 if (time_after(jiffies, sta->last_rx +
1950 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 1951 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
1952 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 1953 __sta_info_get(sta);
1954 sta_info_remove(sta);
1955 list_add(&sta->list, &tmp_list);
f0706e82 1956 }
be8755e1
MW		 1957 write_unlock_bh(&local->sta_lock);
1958
1959 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1960 sta_info_free(sta);
1961 sta_info_put(sta);
1962 }
f0706e82
JB		 1963}
1964
1965
1966static void ieee80211_sta_merge_ibss(struct net_device *dev,
1967 struct ieee80211_if_sta *ifsta)
1968{
1969 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1970
1971 ieee80211_sta_expire(dev);
1972 if (ieee80211_sta_active_ibss(dev))
1973 return;
1974
1975 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1976 "IBSS networks with same SSID (merge)\n", dev->name);
1977 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1978}
1979
1980
1981void ieee80211_sta_timer(unsigned long data)
1982{
1983 struct ieee80211_sub_if_data *sdata =
1984 (struct ieee80211_sub_if_data *) data;
1985 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1986 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1987
1988 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1989 queue_work(local->hw.workqueue, &ifsta->work);
1990}
1991
1992
1993void ieee80211_sta_work(struct work_struct *work)
1994{
1995 struct ieee80211_sub_if_data *sdata =
1996 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1997 struct net_device *dev = sdata->dev;
1998 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1999 struct ieee80211_if_sta *ifsta;
2000 struct sk_buff *skb;
2001
2002 if (!netif_running(dev))
2003 return;
2004
2005 if (local->sta_scanning)
2006 return;
2007
2008 if (sdata->type != IEEE80211_IF_TYPE_STA &&
2009 sdata->type != IEEE80211_IF_TYPE_IBSS) {
2010 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2011 "(type=%d)\n", dev->name, sdata->type);
2012 return;
2013 }
2014 ifsta = &sdata->u.sta;
2015
2016 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2017 ieee80211_sta_rx_queued_mgmt(dev, skb);
2018
2019 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2020 ifsta->state != IEEE80211_ASSOCIATE &&
2021 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2022 ieee80211_sta_start_scan(dev, NULL, 0);
2023 return;
2024 }
2025
2026 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2027 if (ieee80211_sta_config_auth(dev, ifsta))
2028 return;
2029 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2030 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2031 return;
2032
2033 switch (ifsta->state) {
2034 case IEEE80211_DISABLED:
2035 break;
2036 case IEEE80211_AUTHENTICATE:
2037 ieee80211_authenticate(dev, ifsta);
2038 break;
2039 case IEEE80211_ASSOCIATE:
2040 ieee80211_associate(dev, ifsta);
2041 break;
2042 case IEEE80211_ASSOCIATED:
2043 ieee80211_associated(dev, ifsta);
2044 break;
2045 case IEEE80211_IBSS_SEARCH:
2046 ieee80211_sta_find_ibss(dev, ifsta);
2047 break;
2048 case IEEE80211_IBSS_JOINED:
2049 ieee80211_sta_merge_ibss(dev, ifsta);
2050 break;
2051 default:
2052 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2053 ifsta->state);
2054 break;
2055 }
2056
2057 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2058 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2059 "mixed-cell disabled - disassociate\n", dev->name);
2060
2061 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2062 ieee80211_set_disassoc(dev, ifsta, 0);
2063 }
2064}
2065
2066
2067static void ieee80211_sta_reset_auth(struct net_device *dev,
2068 struct ieee80211_if_sta *ifsta)
2069{
2070 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2071
2072 if (local->ops->reset_tsf) {
2073 /* Reset own TSF to allow time synchronization work. */
2074 local->ops->reset_tsf(local_to_hw(local));
2075 }
2076
2077 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2078
2079
2080 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2081 ifsta->auth_alg = WLAN_AUTH_OPEN;
2082 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2083 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2084 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2085 ifsta->auth_alg = WLAN_AUTH_LEAP;
2086 else
2087 ifsta->auth_alg = WLAN_AUTH_OPEN;
2088 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2089 ifsta->auth_alg);
2090 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2091 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2092 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2093 netif_carrier_off(dev);
2094}
2095
2096
2097void ieee80211_sta_req_auth(struct net_device *dev,
2098 struct ieee80211_if_sta *ifsta)
2099{
2100 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2101 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2102
2103 if (sdata->type != IEEE80211_IF_TYPE_STA)
2104 return;
2105
d6f2da5b
JS		 2106 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2107 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2108 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2109 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2110 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2111 queue_work(local->hw.workqueue, &ifsta->work);
2112 }
2113}
2114
2115static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2116 const char *ssid, int ssid_len)
2117{
2118 int tmp, hidden_ssid;
2119
2120 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2121 return 1;
2122
d6f2da5b 2123 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2124 return 0;
2125
2126 hidden_ssid = 1;
2127 tmp = ssid_len;
2128 while (tmp--) {
2129 if (ssid[tmp] != '\0') {
2130 hidden_ssid = 0;
2131 break;
2132 }
2133 }
2134
2135 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2136 return 1;
2137
2138 if (ssid_len == 1 && ssid[0] == ' ')
2139 return 1;
2140
2141 return 0;
2142}
2143
2144static int ieee80211_sta_config_auth(struct net_device *dev,
2145 struct ieee80211_if_sta *ifsta)
2146{
2147 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2148 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2149 struct ieee80211_sta_bss *bss, *selected = NULL;
2150 int top_rssi = 0, freq;
2151
d6f2da5b
JS		 2152 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2153 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2154 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2155 ieee80211_sta_reset_auth(dev, ifsta);
2156 return 0;
2157 }
2158
2159 spin_lock_bh(&local->sta_bss_lock);
2160 freq = local->oper_channel->freq;
2161 list_for_each_entry(bss, &local->sta_bss_list, list) {
2162 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2163 continue;
2164
2165 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2166 !!sdata->default_key)
2167 continue;
2168
d6f2da5b
JS		 2169 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2170 bss->freq != freq)
f0706e82
JB		 2171 continue;
2172
d6f2da5b 2173 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2174 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2175 continue;
2176
d6f2da5b 2177 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2178 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2179 continue;
2180
2181 if (!selected || top_rssi < bss->rssi) {
2182 selected = bss;
2183 top_rssi = bss->rssi;
2184 }
2185 }
2186 if (selected)
2187 atomic_inc(&selected->users);
2188 spin_unlock_bh(&local->sta_bss_lock);
2189
2190 if (selected) {
2191 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2192 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2193 ieee80211_sta_set_ssid(dev, selected->ssid,
2194 selected->ssid_len);
2195 ieee80211_sta_set_bssid(dev, selected->bssid);
2196 ieee80211_rx_bss_put(dev, selected);
2197 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2198 ieee80211_sta_reset_auth(dev, ifsta);
2199 return 0;
2200 } else {
2201 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2202 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2203 ieee80211_sta_start_scan(dev, NULL, 0);
2204 else
2205 ieee80211_sta_start_scan(dev, ifsta->ssid,
2206 ifsta->ssid_len);
f0706e82
JB		 2207 ifsta->state = IEEE80211_AUTHENTICATE;
2208 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2209 } else
2210 ifsta->state = IEEE80211_DISABLED;
2211 }
f0706e82
JB		 2212 return -1;
2213}
2214
2215static int ieee80211_sta_join_ibss(struct net_device *dev,
2216 struct ieee80211_if_sta *ifsta,
2217 struct ieee80211_sta_bss *bss)
2218{
2219 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2220 int res, rates, i, j;
2221 struct sk_buff *skb;
2222 struct ieee80211_mgmt *mgmt;
2223 struct ieee80211_tx_control control;
2224 struct ieee80211_rate *rate;
2225 struct ieee80211_hw_mode *mode;
2226 struct rate_control_extra extra;
2227 u8 *pos;
2228 struct ieee80211_sub_if_data *sdata;
2229
2230 /* Remove possible STA entries from other IBSS networks. */
2231 sta_info_flush(local, NULL);
2232
2233 if (local->ops->reset_tsf) {
2234 /* Reset own TSF to allow time synchronization work. */
2235 local->ops->reset_tsf(local_to_hw(local));
2236 }
2237 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2238 res = ieee80211_if_config(dev);
2239 if (res)
2240 return res;
2241
2242 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2243
2244 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2245 sdata->drop_unencrypted = bss->capability &
2246 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2247
2248 res = ieee80211_set_channel(local, -1, bss->freq);
2249
2250 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2251 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2252 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2253 local->hw.conf.freq);
2254 return -1;
2255 }
2256
2257 /* Set beacon template based on scan results */
2258 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2259 do {
2260 if (!skb)
2261 break;
2262
2263 skb_reserve(skb, local->hw.extra_tx_headroom);
2264
2265 mgmt = (struct ieee80211_mgmt *)
2266 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2267 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2268 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2269 IEEE80211_STYPE_BEACON);
2270 memset(mgmt->da, 0xff, ETH_ALEN);
2271 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2272 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2273 mgmt->u.beacon.beacon_int =
2274 cpu_to_le16(local->hw.conf.beacon_int);
2275 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2276
2277 pos = skb_put(skb, 2 + ifsta->ssid_len);
2278 *pos++ = WLAN_EID_SSID;
2279 *pos++ = ifsta->ssid_len;
2280 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2281
2282 rates = bss->supp_rates_len;
2283 if (rates > 8)
2284 rates = 8;
2285 pos = skb_put(skb, 2 + rates);
2286 *pos++ = WLAN_EID_SUPP_RATES;
2287 *pos++ = rates;
2288 memcpy(pos, bss->supp_rates, rates);
2289
2290 pos = skb_put(skb, 2 + 1);
2291 *pos++ = WLAN_EID_DS_PARAMS;
2292 *pos++ = 1;
2293 *pos++ = bss->channel;
2294
2295 pos = skb_put(skb, 2 + 2);
2296 *pos++ = WLAN_EID_IBSS_PARAMS;
2297 *pos++ = 2;
2298 /* FIX: set ATIM window based on scan results */
2299 *pos++ = 0;
2300 *pos++ = 0;
2301
2302 if (bss->supp_rates_len > 8) {
2303 rates = bss->supp_rates_len - 8;
2304 pos = skb_put(skb, 2 + rates);
2305 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2306 *pos++ = rates;
2307 memcpy(pos, &bss->supp_rates[8], rates);
2308 }
2309
2310 memset(&control, 0, sizeof(control));
2311 memset(&extra, 0, sizeof(extra));
2312 extra.mode = local->oper_hw_mode;
2313 rate = rate_control_get_rate(local, dev, skb, &extra);
2314 if (!rate) {
2315 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2316 "for IBSS beacon\n", dev->name);
2317 break;
2318 }
13262ffd
JS		 2319 control.tx_rate =
2320 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2321 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
f0706e82
JB		 2322 rate->val2 : rate->val;
2323 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2324 control.power_level = local->hw.conf.power_level;
2325 control.flags |= IEEE80211_TXCTL_NO_ACK;
2326 control.retry_limit = 1;
2327
2328 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2329 if (ifsta->probe_resp) {
2330 mgmt = (struct ieee80211_mgmt *)
2331 ifsta->probe_resp->data;
2332 mgmt->frame_control =
2333 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2334 IEEE80211_STYPE_PROBE_RESP);
2335 } else {
2336 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2337 "template for IBSS\n", dev->name);
2338 }
2339
2340 if (local->ops->beacon_update &&
2341 local->ops->beacon_update(local_to_hw(local),
2342 skb, &control) == 0) {
2343 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2344 "template based on scan results\n", dev->name);
2345 skb = NULL;
2346 }
2347
2348 rates = 0;
2349 mode = local->oper_hw_mode;
2350 for (i = 0; i < bss->supp_rates_len; i++) {
2351 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 2352 for (j = 0; j < mode->num_rates; j++)
2353 if (mode->rates[j].rate == bitrate)
2354 rates |= BIT(j);
2355 }
2356 ifsta->supp_rates_bits = rates;
2357 } while (0);
2358
2359 if (skb) {
2360 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2361 "template\n", dev->name);
2362 dev_kfree_skb(skb);
2363 }
2364
2365 ifsta->state = IEEE80211_IBSS_JOINED;
2366 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2367
2368 ieee80211_rx_bss_put(dev, bss);
2369
2370 return res;
2371}
2372
2373
2374static int ieee80211_sta_create_ibss(struct net_device *dev,
2375 struct ieee80211_if_sta *ifsta)
2376{
2377 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2378 struct ieee80211_sta_bss *bss;
2379 struct ieee80211_sub_if_data *sdata;
2380 struct ieee80211_hw_mode *mode;
2381 u8 bssid[ETH_ALEN], *pos;
2382 int i;
0795af57 2383 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2384
2385#if 0
2386 /* Easier testing, use fixed BSSID. */
2387 memset(bssid, 0xfe, ETH_ALEN);
2388#else
2389 /* Generate random, not broadcast, locally administered BSSID. Mix in
2390 * own MAC address to make sure that devices that do not have proper
2391 * random number generator get different BSSID. */
2392 get_random_bytes(bssid, ETH_ALEN);
2393 for (i = 0; i < ETH_ALEN; i++)
2394 bssid[i] ^= dev->dev_addr[i];
2395 bssid[0] &= ~0x01;
2396 bssid[0] |= 0x02;
2397#endif
2398
0795af57
JP		 2399 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2400 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2401
2402 bss = ieee80211_rx_bss_add(dev, bssid);
2403 if (!bss)
2404 return -ENOMEM;
2405
2406 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2407 mode = local->oper_hw_mode;
2408
2409 if (local->hw.conf.beacon_int == 0)
2410 local->hw.conf.beacon_int = 100;
2411 bss->beacon_int = local->hw.conf.beacon_int;
2412 bss->hw_mode = local->hw.conf.phymode;
2413 bss->channel = local->hw.conf.channel;
2414 bss->freq = local->hw.conf.freq;
2415 bss->last_update = jiffies;
2416 bss->capability = WLAN_CAPABILITY_IBSS;
2417 if (sdata->default_key) {
2418 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2419 } else
2420 sdata->drop_unencrypted = 0;
2421 bss->supp_rates_len = mode->num_rates;
2422 pos = bss->supp_rates;
2423 for (i = 0; i < mode->num_rates; i++) {
2424 int rate = mode->rates[i].rate;
f0706e82
JB		 2425 *pos++ = (u8) (rate / 5);
2426 }
2427
2428 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2429}
2430
2431
2432static int ieee80211_sta_find_ibss(struct net_device *dev,
2433 struct ieee80211_if_sta *ifsta)
2434{
2435 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2436 struct ieee80211_sta_bss *bss;
2437 int found = 0;
2438 u8 bssid[ETH_ALEN];
2439 int active_ibss;
0795af57
JP		 2440 DECLARE_MAC_BUF(mac);
2441 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2442
2443 if (ifsta->ssid_len == 0)
2444 return -EINVAL;
2445
2446 active_ibss = ieee80211_sta_active_ibss(dev);
2447#ifdef CONFIG_MAC80211_IBSS_DEBUG
2448 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2449 dev->name, active_ibss);
2450#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2451 spin_lock_bh(&local->sta_bss_lock);
2452 list_for_each_entry(bss, &local->sta_bss_list, list) {
2453 if (ifsta->ssid_len != bss->ssid_len ||
2454 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2455 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2456 continue;
2457#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2458 printk(KERN_DEBUG " bssid=%s found\n",
2459 print_mac(mac, bss->bssid));
f0706e82
JB		 2460#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2461 memcpy(bssid, bss->bssid, ETH_ALEN);
2462 found = 1;
2463 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2464 break;
2465 }
2466 spin_unlock_bh(&local->sta_bss_lock);
2467
2468#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2469 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2470 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 2471#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2472 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2473 (bss = ieee80211_rx_bss_get(dev, bssid))) {
0795af57 2474 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2475 " based on configured SSID\n",
0795af57 2476 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2477 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2478 }
2479#ifdef CONFIG_MAC80211_IBSS_DEBUG
2480 printk(KERN_DEBUG " did not try to join ibss\n");
2481#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2482
2483 /* Selected IBSS not found in current scan results - try to scan */
2484 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2485 !ieee80211_sta_active_ibss(dev)) {
2486 mod_timer(&ifsta->timer, jiffies +
2487 IEEE80211_IBSS_MERGE_INTERVAL);
2488 } else if (time_after(jiffies, local->last_scan_completed +
2489 IEEE80211_SCAN_INTERVAL)) {
2490 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2491 "join\n", dev->name);
2492 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2493 ifsta->ssid_len);
2494 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2495 int interval = IEEE80211_SCAN_INTERVAL;
2496
2497 if (time_after(jiffies, ifsta->ibss_join_req +
2498 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2499 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 2500 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2501 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 2502 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 2503 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2504 " configured channel %d (%d MHz)\n",
2505 dev->name, local->hw.conf.channel,
2506 local->hw.conf.freq);
2507 }
2508
2509 /* No IBSS found - decrease scan interval and continue
2510 * scanning. */
2511 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2512 }
2513
2514 ifsta->state = IEEE80211_IBSS_SEARCH;
2515 mod_timer(&ifsta->timer, jiffies + interval);
2516 return 0;
2517 }
2518
2519 return 0;
2520}
2521
2522
2523int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2524{
2525 struct ieee80211_sub_if_data *sdata;
2526 struct ieee80211_if_sta *ifsta;
2527 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2528
2529 if (len > IEEE80211_MAX_SSID_LEN)
2530 return -EINVAL;
2531
2532 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2533 * not defined. */
2534 if (local->ops->conf_tx) {
2535 struct ieee80211_tx_queue_params qparam;
2536 int i;
2537
2538 memset(&qparam, 0, sizeof(qparam));
2539 /* TODO: are these ok defaults for all hw_modes? */
2540 qparam.aifs = 2;
2541 qparam.cw_min =
2542 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2543 qparam.cw_max = 1023;
2544 qparam.burst_time = 0;
2545 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2546 {
2547 local->ops->conf_tx(local_to_hw(local),
2548 i + IEEE80211_TX_QUEUE_DATA0,
2549 &qparam);
2550 }
2551 /* IBSS uses different parameters for Beacon sending */
2552 qparam.cw_min++;
2553 qparam.cw_min *= 2;
2554 qparam.cw_min--;
2555 local->ops->conf_tx(local_to_hw(local),
2556 IEEE80211_TX_QUEUE_BEACON, &qparam);
2557 }
2558
2559 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2560 ifsta = &sdata->u.sta;
2561
2562 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 2563 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2564 memcpy(ifsta->ssid, ssid, len);
2565 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2566 ifsta->ssid_len = len;
2567
d6f2da5b
JS		 2568 if (len)
2569 ifsta->flags |= IEEE80211_STA_SSID_SET;
2570 else
2571 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2572 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2573 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 2574 ifsta->ibss_join_req = jiffies;
2575 ifsta->state = IEEE80211_IBSS_SEARCH;
2576 return ieee80211_sta_find_ibss(dev, ifsta);
2577 }
2578 return 0;
2579}
2580
2581
2582int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2583{
2584 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2585 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2586 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2587 *len = ifsta->ssid_len;
2588 return 0;
2589}
2590
2591
2592int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2593{
2594 struct ieee80211_sub_if_data *sdata;
2595 struct ieee80211_if_sta *ifsta;
2596 int res;
2597
2598 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2599 ifsta = &sdata->u.sta;
2600
2601 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2602 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2603 res = ieee80211_if_config(dev);
2604 if (res) {
2605 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2606 "the low-level driver\n", dev->name);
2607 return res;
2608 }
2609 }
2610
d6f2da5b
JS		 2611 if (is_valid_ether_addr(bssid))
2612 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 2613 else
d6f2da5b
JS		 2614 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2615
f0706e82
JB		 2616 return 0;
2617}
2618
2619
2620static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2621 struct ieee80211_sub_if_data *sdata,
2622 int powersave)
2623{
2624 struct sk_buff *skb;
2625 struct ieee80211_hdr *nullfunc;
2626 u16 fc;
2627
2628 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2629 if (!skb) {
2630 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2631 "frame\n", sdata->dev->name);
2632 return;
2633 }
2634 skb_reserve(skb, local->hw.extra_tx_headroom);
2635
2636 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2637 memset(nullfunc, 0, 24);
2638 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2639 IEEE80211_FCTL_TODS;
2640 if (powersave)
2641 fc |= IEEE80211_FCTL_PM;
2642 nullfunc->frame_control = cpu_to_le16(fc);
2643 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2644 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2645 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2646
2647 ieee80211_sta_tx(sdata->dev, skb, 0);
2648}
2649
2650
2651void ieee80211_scan_completed(struct ieee80211_hw *hw)
2652{
2653 struct ieee80211_local *local = hw_to_local(hw);
2654 struct net_device *dev = local->scan_dev;
2655 struct ieee80211_sub_if_data *sdata;
2656 union iwreq_data wrqu;
2657
2658 local->last_scan_completed = jiffies;
2659 wmb();
2660 local->sta_scanning = 0;
2661
2662 if (ieee80211_hw_config(local))
2663 printk(KERN_DEBUG "%s: failed to restore operational"
2664 "channel after scan\n", dev->name);
2665
2666 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2667 ieee80211_if_config(dev))
2668 printk(KERN_DEBUG "%s: failed to restore operational"
2669 "BSSID after scan\n", dev->name);
2670
2671 memset(&wrqu, 0, sizeof(wrqu));
2672 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2673
2674 read_lock(&local->sub_if_lock);
2675 list_for_each_entry(sdata, &local->sub_if_list, list) {
14042cbe
MN		 2676
2677 /* No need to wake the master device. */
2678 if (sdata->dev == local->mdev)
2679 continue;
2680
f0706e82 2681 if (sdata->type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 2682 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 2683 ieee80211_send_nullfunc(local, sdata, 0);
2684 ieee80211_sta_timer((unsigned long)sdata);
2685 }
14042cbe 2686
f0706e82
JB		 2687 netif_wake_queue(sdata->dev);
2688 }
2689 read_unlock(&local->sub_if_lock);
2690
2691 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2692 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2693 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 2694 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 2695 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2696 !ieee80211_sta_active_ibss(dev)))
2697 ieee80211_sta_find_ibss(dev, ifsta);
2698 }
2699}
2700EXPORT_SYMBOL(ieee80211_scan_completed);
2701
2702void ieee80211_sta_scan_work(struct work_struct *work)
2703{
2704 struct ieee80211_local *local =
2705 container_of(work, struct ieee80211_local, scan_work.work);
2706 struct net_device *dev = local->scan_dev;
2707 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2708 struct ieee80211_hw_mode *mode;
2709 struct ieee80211_channel *chan;
2710 int skip;
2711 unsigned long next_delay = 0;
2712
2713 if (!local->sta_scanning)
2714 return;
2715
2716 switch (local->scan_state) {
2717 case SCAN_SET_CHANNEL:
2718 mode = local->scan_hw_mode;
2719 if (local->scan_hw_mode->list.next == &local->modes_list &&
2720 local->scan_channel_idx >= mode->num_channels) {
2721 ieee80211_scan_completed(local_to_hw(local));
2722 return;
2723 }
2724 skip = !(local->enabled_modes & (1 << mode->mode));
2725 chan = &mode->channels[local->scan_channel_idx];
2726 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2727 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2728 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2729 (local->hw_modes & local->enabled_modes &
2730 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2731 skip = 1;
2732
2733 if (!skip) {
2734#if 0
2735 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2736 dev->name, chan->chan, chan->freq);
2737#endif
2738
2739 local->scan_channel = chan;
2740 if (ieee80211_hw_config(local)) {
2741 printk(KERN_DEBUG "%s: failed to set channel "
2742 "%d (%d MHz) for scan\n", dev->name,
2743 chan->chan, chan->freq);
2744 skip = 1;
2745 }
2746 }
2747
2748 local->scan_channel_idx++;
2749 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2750 if (local->scan_hw_mode->list.next != &local->modes_list) {
2751 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2752 struct ieee80211_hw_mode,
2753 list);
2754 local->scan_channel_idx = 0;
2755 }
2756 }
2757
2758 if (skip)
2759 break;
2760
2761 next_delay = IEEE80211_PROBE_DELAY +
2762 usecs_to_jiffies(local->hw.channel_change_time);
2763 local->scan_state = SCAN_SEND_PROBE;
2764 break;
2765 case SCAN_SEND_PROBE:
2766 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2767 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2768 local->scan_ssid_len);
2769 next_delay = IEEE80211_CHANNEL_TIME;
2770 } else
2771 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2772 local->scan_state = SCAN_SET_CHANNEL;
2773 break;
2774 }
2775
2776 if (local->sta_scanning)
2777 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2778 next_delay);
2779}
2780
2781
2782static int ieee80211_sta_start_scan(struct net_device *dev,
2783 u8 *ssid, size_t ssid_len)
2784{
2785 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2786 struct ieee80211_sub_if_data *sdata;
2787
2788 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2789 return -EINVAL;
2790
2791 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2792 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2793 * BSSID: MACAddress
2794 * SSID
2795 * ScanType: ACTIVE, PASSIVE
2796 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2797 * a Probe frame during active scanning
2798 * ChannelList
2799 * MinChannelTime (>= ProbeDelay), in TU
2800 * MaxChannelTime: (>= MinChannelTime), in TU
2801 */
2802
2803 /* MLME-SCAN.confirm
2804 * BSSDescriptionSet
2805 * ResultCode: SUCCESS, INVALID_PARAMETERS
2806 */
2807
2808 if (local->sta_scanning) {
2809 if (local->scan_dev == dev)
2810 return 0;
2811 return -EBUSY;
2812 }
2813
2814 if (local->ops->hw_scan) {
2815 int rc = local->ops->hw_scan(local_to_hw(local),
2816 ssid, ssid_len);
2817 if (!rc) {
2818 local->sta_scanning = 1;
2819 local->scan_dev = dev;
2820 }
2821 return rc;
2822 }
2823
2824 local->sta_scanning = 1;
2825
2826 read_lock(&local->sub_if_lock);
2827 list_for_each_entry(sdata, &local->sub_if_list, list) {
14042cbe
MN		 2828
2829 /* Don't stop the master interface, otherwise we can't transmit
2830 * probes! */
2831 if (sdata->dev == local->mdev)
2832 continue;
2833
f0706e82
JB		 2834 netif_stop_queue(sdata->dev);
2835 if (sdata->type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 2836 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2837 ieee80211_send_nullfunc(local, sdata, 1);
2838 }
2839 read_unlock(&local->sub_if_lock);
2840
2841 if (ssid) {
2842 local->scan_ssid_len = ssid_len;
2843 memcpy(local->scan_ssid, ssid, ssid_len);
2844 } else
2845 local->scan_ssid_len = 0;
2846 local->scan_state = SCAN_SET_CHANNEL;
2847 local->scan_hw_mode = list_entry(local->modes_list.next,
2848 struct ieee80211_hw_mode,
2849 list);
2850 local->scan_channel_idx = 0;
2851 local->scan_dev = dev;
2852
2853 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2854 ieee80211_if_config(dev))
2855 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2856 dev->name);
2857
2858 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2859 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2860 IEEE80211_CHANNEL_TIME);
2861
2862 return 0;
2863}
2864
2865
2866int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2867{
2868 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2869 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2870 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2871
2872 if (sdata->type != IEEE80211_IF_TYPE_STA)
2873 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2874
2875 if (local->sta_scanning) {
2876 if (local->scan_dev == dev)
2877 return 0;
2878 return -EBUSY;
2879 }
2880
2881 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2882 queue_work(local->hw.workqueue, &ifsta->work);
2883 return 0;
2884}
2885
2886static char *
2887ieee80211_sta_scan_result(struct net_device *dev,
2888 struct ieee80211_sta_bss *bss,
2889 char *current_ev, char *end_buf)
2890{
2891 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2892 struct iw_event iwe;
2893
2894 if (time_after(jiffies,
2895 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2896 return current_ev;
2897
2898 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2899 return current_ev;
2900
2901 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2902 !bss->wpa_ie && !bss->rsn_ie)
2903 return current_ev;
2904
2905 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2906 (local->scan_ssid_len != bss->ssid_len ||
2907 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2908 return current_ev;
2909
2910 memset(&iwe, 0, sizeof(iwe));
2911 iwe.cmd = SIOCGIWAP;
2912 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2913 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2914 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2915 IW_EV_ADDR_LEN);
2916
2917 memset(&iwe, 0, sizeof(iwe));
2918 iwe.cmd = SIOCGIWESSID;
2919 iwe.u.data.length = bss->ssid_len;
2920 iwe.u.data.flags = 1;
2921 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2922 bss->ssid);
2923
2924 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2925 memset(&iwe, 0, sizeof(iwe));
2926 iwe.cmd = SIOCGIWMODE;
2927 if (bss->capability & WLAN_CAPABILITY_ESS)
2928 iwe.u.mode = IW_MODE_MASTER;
2929 else
2930 iwe.u.mode = IW_MODE_ADHOC;
2931 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2932 IW_EV_UINT_LEN);
2933 }
2934
2935 memset(&iwe, 0, sizeof(iwe));
2936 iwe.cmd = SIOCGIWFREQ;
2937 iwe.u.freq.m = bss->channel;
2938 iwe.u.freq.e = 0;
2939 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2940 IW_EV_FREQ_LEN);
2941 iwe.u.freq.m = bss->freq * 100000;
2942 iwe.u.freq.e = 1;
2943 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2944 IW_EV_FREQ_LEN);
2945
2946 memset(&iwe, 0, sizeof(iwe));
2947 iwe.cmd = IWEVQUAL;
2948 iwe.u.qual.qual = bss->signal;
2949 iwe.u.qual.level = bss->rssi;
2950 iwe.u.qual.noise = bss->noise;
2951 iwe.u.qual.updated = local->wstats_flags;
2952 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2953 IW_EV_QUAL_LEN);
2954
2955 memset(&iwe, 0, sizeof(iwe));
2956 iwe.cmd = SIOCGIWENCODE;
2957 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2958 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2959 else
2960 iwe.u.data.flags = IW_ENCODE_DISABLED;
2961 iwe.u.data.length = 0;
2962 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2963
2964 if (bss && bss->wpa_ie) {
2965 memset(&iwe, 0, sizeof(iwe));
2966 iwe.cmd = IWEVGENIE;
2967 iwe.u.data.length = bss->wpa_ie_len;
2968 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2969 bss->wpa_ie);
2970 }
2971
2972 if (bss && bss->rsn_ie) {
2973 memset(&iwe, 0, sizeof(iwe));
2974 iwe.cmd = IWEVGENIE;
2975 iwe.u.data.length = bss->rsn_ie_len;
2976 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2977 bss->rsn_ie);
2978 }
2979
2980 if (bss && bss->supp_rates_len > 0) {
2981 /* display all supported rates in readable format */
2982 char *p = current_ev + IW_EV_LCP_LEN;
2983 int i;
2984
2985 memset(&iwe, 0, sizeof(iwe));
2986 iwe.cmd = SIOCGIWRATE;
2987 /* Those two flags are ignored... */
2988 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2989
2990 for (i = 0; i < bss->supp_rates_len; i++) {
2991 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2992 0x7f) * 500000);
2993 p = iwe_stream_add_value(current_ev, p,
2994 end_buf, &iwe, IW_EV_PARAM_LEN);
2995 }
2996 current_ev = p;
2997 }
2998
2999 if (bss) {
3000 char *buf;
3001 buf = kmalloc(30, GFP_ATOMIC);
3002 if (buf) {
3003 memset(&iwe, 0, sizeof(iwe));
3004 iwe.cmd = IWEVCUSTOM;
3005 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3006 iwe.u.data.length = strlen(buf);
3007 current_ev = iwe_stream_add_point(current_ev, end_buf,
3008 &iwe, buf);
3009 kfree(buf);
3010 }
3011 }
3012
3013 do {
3014 char *buf;
3015
3016 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
3017 break;
3018
3019 buf = kmalloc(100, GFP_ATOMIC);
3020 if (!buf)
3021 break;
3022
3023 memset(&iwe, 0, sizeof(iwe));
3024 iwe.cmd = IWEVCUSTOM;
3025 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3026 iwe.u.data.length = strlen(buf);
3027 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3028 buf);
3029
3030 memset(&iwe, 0, sizeof(iwe));
3031 iwe.cmd = IWEVCUSTOM;
3032 sprintf(buf, "capab=0x%04x", bss->capability);
3033 iwe.u.data.length = strlen(buf);
3034 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3035 buf);
3036
3037 kfree(buf);
3038 break;
3039 } while (0);
3040
3041 return current_ev;
3042}
3043
3044
3045int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3046{
3047 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3048 char *current_ev = buf;
3049 char *end_buf = buf + len;
3050 struct ieee80211_sta_bss *bss;
3051
3052 spin_lock_bh(&local->sta_bss_lock);
3053 list_for_each_entry(bss, &local->sta_bss_list, list) {
3054 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3055 spin_unlock_bh(&local->sta_bss_lock);
3056 return -E2BIG;
3057 }
3058 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3059 end_buf);
3060 }
3061 spin_unlock_bh(&local->sta_bss_lock);
3062 return current_ev - buf;
3063}
3064
3065
3066int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3067{
3068 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3069 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3070 kfree(ifsta->extra_ie);
3071 if (len == 0) {
3072 ifsta->extra_ie = NULL;
3073 ifsta->extra_ie_len = 0;
3074 return 0;
3075 }
3076 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3077 if (!ifsta->extra_ie) {
3078 ifsta->extra_ie_len = 0;
3079 return -ENOMEM;
3080 }
3081 memcpy(ifsta->extra_ie, ie, len);
3082 ifsta->extra_ie_len = len;
3083 return 0;
3084}
3085
3086
3087struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3088 struct sk_buff *skb, u8 *bssid,
3089 u8 *addr)
3090{
3091 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3092 struct sta_info *sta;
91fa558b 3093 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3094 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3095
3096 /* TODO: Could consider removing the least recently used entry and
3097 * allow new one to be added. */
3098 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3099 if (net_ratelimit()) {
3100 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3101 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3102 }
3103 return NULL;
3104 }
3105
0795af57
JP		 3106 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3107 local->mdev->name, print_mac(mac, addr), dev->name);
f0706e82
JB		 3108
3109 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3110 if (!sta)
3111 return NULL;
3112
3113 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3114
3115 rate_control_rate_init(sta, local);
3116
3117 return sta; /* caller will call sta_info_put() */
3118}
3119
3120
3121int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3122{
3123 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3124 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3125
3126 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3127 dev->name, reason);
3128
3129 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3130 sdata->type != IEEE80211_IF_TYPE_IBSS)
3131 return -EINVAL;
3132
3133 ieee80211_send_deauth(dev, ifsta, reason);
3134 ieee80211_set_disassoc(dev, ifsta, 1);
3135 return 0;
3136}
3137
3138
3139int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3140{
3141 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3142 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3143
3144 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3145 dev->name, reason);
3146
3147 if (sdata->type != IEEE80211_IF_TYPE_STA)
3148 return -EINVAL;
3149
d6f2da5b 3150 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3151 return -1;
3152
3153 ieee80211_send_disassoc(dev, ifsta, reason);
3154 ieee80211_set_disassoc(dev, ifsta, 0);
3155 return 0;
3156}
Linux kernel - Deliverables
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