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[MAC80211]: kill key_mgmt, use key_management_enabled
[linux-2.6/kmemtrace.git] / net / mac80211 / ieee80211_sta.c
blob1b33044543566c46e575ca4683be44dad7df6c1b
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 */
20 #include <linux/delay.h>
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>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
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
61 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
62 u8 *ssid, size_t ssid_len);
63 static struct ieee80211_sta_bss *
64 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
65 static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67 static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69 static int ieee80211_sta_wep_configured(struct net_device *dev);
70 static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72 static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76 /* Parsed Information Elements */
77 struct ieee802_11_elems {
78 /* pointers to IEs */
79 u8 *ssid;
80 u8 *supp_rates;
81 u8 *fh_params;
82 u8 *ds_params;
83 u8 *cf_params;
84 u8 *tim;
85 u8 *ibss_params;
86 u8 *challenge;
87 u8 *wpa;
88 u8 *rsn;
89 u8 *erp_info;
90 u8 *ext_supp_rates;
91 u8 *wmm_info;
92 u8 *wmm_param;
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;
108 u8 wmm_param_len;
109 };
110
111 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
112
113
114 static 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
227 static 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
237
238 static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241 {
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(&params, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313 }
314
315
316 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
317 {
318 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
319 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
320 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
321 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
322 u8 changes = 0;
323
324 if (use_protection != sdata->use_protection) {
325 if (net_ratelimit()) {
326 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
327 MAC_FMT ")\n",
328 dev->name,
329 use_protection ? "enabled" : "disabled",
330 MAC_ARG(ifsta->bssid));
331 }
332 sdata->use_protection = use_protection;
333 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
334 }
335
336 if (!preamble_mode != sdata->short_preamble) {
337 if (net_ratelimit()) {
338 printk(KERN_DEBUG "%s: switched to %s barker preamble"
339 " (BSSID=" MAC_FMT ")\n",
340 dev->name,
341 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
342 "short" : "long",
343 MAC_ARG(ifsta->bssid));
344 }
345 sdata->short_preamble = !preamble_mode;
346 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
347 }
348
349 if (changes)
350 ieee80211_erp_info_change_notify(dev, changes);
351 }
352
353
354 static void ieee80211_sta_send_associnfo(struct net_device *dev,
355 struct ieee80211_if_sta *ifsta)
356 {
357 char *buf;
358 size_t len;
359 int i;
360 union iwreq_data wrqu;
361
362 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
363 return;
364
365 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
366 ifsta->assocresp_ies_len), GFP_KERNEL);
367 if (!buf)
368 return;
369
370 len = sprintf(buf, "ASSOCINFO(");
371 if (ifsta->assocreq_ies) {
372 len += sprintf(buf + len, "ReqIEs=");
373 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
374 len += sprintf(buf + len, "%02x",
375 ifsta->assocreq_ies[i]);
376 }
377 }
378 if (ifsta->assocresp_ies) {
379 if (ifsta->assocreq_ies)
380 len += sprintf(buf + len, " ");
381 len += sprintf(buf + len, "RespIEs=");
382 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
383 len += sprintf(buf + len, "%02x",
384 ifsta->assocresp_ies[i]);
385 }
386 }
387 len += sprintf(buf + len, ")");
388
389 if (len > IW_CUSTOM_MAX) {
390 len = sprintf(buf, "ASSOCRESPIE=");
391 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
392 len += sprintf(buf + len, "%02x",
393 ifsta->assocresp_ies[i]);
394 }
395 }
396
397 memset(&wrqu, 0, sizeof(wrqu));
398 wrqu.data.length = len;
399 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
400
401 kfree(buf);
402 }
403
404
405 static void ieee80211_set_associated(struct net_device *dev,
406 struct ieee80211_if_sta *ifsta, int assoc)
407 {
408 union iwreq_data wrqu;
409
410 if (ifsta->associated == assoc)
411 return;
412
413 ifsta->associated = assoc;
414
415 if (assoc) {
416 struct ieee80211_sub_if_data *sdata;
417 struct ieee80211_sta_bss *bss;
418 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
419 if (sdata->type != IEEE80211_IF_TYPE_STA)
420 return;
421
422 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
423 if (bss) {
424 if (bss->has_erp_value)
425 ieee80211_handle_erp_ie(dev, bss->erp_value);
426 ieee80211_rx_bss_put(dev, bss);
427 }
428
429 netif_carrier_on(dev);
430 ifsta->prev_bssid_set = 1;
431 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
432 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
433 ieee80211_sta_send_associnfo(dev, ifsta);
434 } else {
435 netif_carrier_off(dev);
436 ieee80211_reset_erp_info(dev);
437 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
438 }
439 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
440 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
441 ifsta->last_probe = jiffies;
442 }
443
444 static void ieee80211_set_disassoc(struct net_device *dev,
445 struct ieee80211_if_sta *ifsta, int deauth)
446 {
447 if (deauth)
448 ifsta->auth_tries = 0;
449 ifsta->assoc_tries = 0;
450 ieee80211_set_associated(dev, ifsta, 0);
451 }
452
453 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
454 int encrypt)
455 {
456 struct ieee80211_sub_if_data *sdata;
457 struct ieee80211_tx_packet_data *pkt_data;
458
459 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
460 skb->dev = sdata->local->mdev;
461 skb_set_mac_header(skb, 0);
462 skb_set_network_header(skb, 0);
463 skb_set_transport_header(skb, 0);
464
465 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
466 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
467 pkt_data->ifindex = sdata->dev->ifindex;
468 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
469 pkt_data->do_not_encrypt = !encrypt;
470
471 dev_queue_xmit(skb);
472 }
473
474
475 static void ieee80211_send_auth(struct net_device *dev,
476 struct ieee80211_if_sta *ifsta,
477 int transaction, u8 *extra, size_t extra_len,
478 int encrypt)
479 {
480 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
481 struct sk_buff *skb;
482 struct ieee80211_mgmt *mgmt;
483
484 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
485 sizeof(*mgmt) + 6 + extra_len);
486 if (!skb) {
487 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
488 "frame\n", dev->name);
489 return;
490 }
491 skb_reserve(skb, local->hw.extra_tx_headroom);
492
493 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
494 memset(mgmt, 0, 24 + 6);
495 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
496 IEEE80211_STYPE_AUTH);
497 if (encrypt)
498 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
499 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
500 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
501 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
502 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
503 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
504 ifsta->auth_transaction = transaction + 1;
505 mgmt->u.auth.status_code = cpu_to_le16(0);
506 if (extra)
507 memcpy(skb_put(skb, extra_len), extra, extra_len);
508
509 ieee80211_sta_tx(dev, skb, encrypt);
510 }
511
512
513 static void ieee80211_authenticate(struct net_device *dev,
514 struct ieee80211_if_sta *ifsta)
515 {
516 ifsta->auth_tries++;
517 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
518 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
519 " timed out\n",
520 dev->name, MAC_ARG(ifsta->bssid));
521 ifsta->state = IEEE80211_DISABLED;
522 return;
523 }
524
525 ifsta->state = IEEE80211_AUTHENTICATE;
526 printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
527 dev->name, MAC_ARG(ifsta->bssid));
528
529 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
530
531 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
532 }
533
534
535 static void ieee80211_send_assoc(struct net_device *dev,
536 struct ieee80211_if_sta *ifsta)
537 {
538 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
539 struct ieee80211_hw_mode *mode;
540 struct sk_buff *skb;
541 struct ieee80211_mgmt *mgmt;
542 u8 *pos, *ies;
543 int i, len;
544 u16 capab;
545 struct ieee80211_sta_bss *bss;
546 int wmm = 0;
547
548 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
549 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
550 ifsta->ssid_len);
551 if (!skb) {
552 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
553 "frame\n", dev->name);
554 return;
555 }
556 skb_reserve(skb, local->hw.extra_tx_headroom);
557
558 mode = local->oper_hw_mode;
559 capab = ifsta->capab;
560 if (mode->mode == MODE_IEEE80211G) {
561 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
562 WLAN_CAPABILITY_SHORT_PREAMBLE;
563 }
564 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
565 if (bss) {
566 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
567 capab |= WLAN_CAPABILITY_PRIVACY;
568 if (bss->wmm_ie) {
569 wmm = 1;
570 }
571 ieee80211_rx_bss_put(dev, bss);
572 }
573
574 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
575 memset(mgmt, 0, 24);
576 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
577 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
578 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
579
580 if (ifsta->prev_bssid_set) {
581 skb_put(skb, 10);
582 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
583 IEEE80211_STYPE_REASSOC_REQ);
584 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
585 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
586 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
587 ETH_ALEN);
588 } else {
589 skb_put(skb, 4);
590 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
591 IEEE80211_STYPE_ASSOC_REQ);
592 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
593 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
594 }
595
596 /* SSID */
597 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
598 *pos++ = WLAN_EID_SSID;
599 *pos++ = ifsta->ssid_len;
600 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
601
602 len = mode->num_rates;
603 if (len > 8)
604 len = 8;
605 pos = skb_put(skb, len + 2);
606 *pos++ = WLAN_EID_SUPP_RATES;
607 *pos++ = len;
608 for (i = 0; i < len; i++) {
609 int rate = mode->rates[i].rate;
610 if (mode->mode == MODE_ATHEROS_TURBO)
611 rate /= 2;
612 *pos++ = (u8) (rate / 5);
613 }
614
615 if (mode->num_rates > len) {
616 pos = skb_put(skb, mode->num_rates - len + 2);
617 *pos++ = WLAN_EID_EXT_SUPP_RATES;
618 *pos++ = mode->num_rates - len;
619 for (i = len; i < mode->num_rates; i++) {
620 int rate = mode->rates[i].rate;
621 if (mode->mode == MODE_ATHEROS_TURBO)
622 rate /= 2;
623 *pos++ = (u8) (rate / 5);
624 }
625 }
626
627 if (ifsta->extra_ie) {
628 pos = skb_put(skb, ifsta->extra_ie_len);
629 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
630 }
631
632 if (wmm && ifsta->wmm_enabled) {
633 pos = skb_put(skb, 9);
634 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
635 *pos++ = 7; /* len */
636 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
637 *pos++ = 0x50;
638 *pos++ = 0xf2;
639 *pos++ = 2; /* WME */
640 *pos++ = 0; /* WME info */
641 *pos++ = 1; /* WME ver */
642 *pos++ = 0;
643 }
644
645 kfree(ifsta->assocreq_ies);
646 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
647 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
648 if (ifsta->assocreq_ies)
649 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
650
651 ieee80211_sta_tx(dev, skb, 0);
652 }
653
654
655 static void ieee80211_send_deauth(struct net_device *dev,
656 struct ieee80211_if_sta *ifsta, u16 reason)
657 {
658 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
659 struct sk_buff *skb;
660 struct ieee80211_mgmt *mgmt;
661
662 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
663 if (!skb) {
664 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
665 "frame\n", dev->name);
666 return;
667 }
668 skb_reserve(skb, local->hw.extra_tx_headroom);
669
670 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
671 memset(mgmt, 0, 24);
672 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
673 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
674 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
675 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
676 IEEE80211_STYPE_DEAUTH);
677 skb_put(skb, 2);
678 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
679
680 ieee80211_sta_tx(dev, skb, 0);
681 }
682
683
684 static void ieee80211_send_disassoc(struct net_device *dev,
685 struct ieee80211_if_sta *ifsta, u16 reason)
686 {
687 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
688 struct sk_buff *skb;
689 struct ieee80211_mgmt *mgmt;
690
691 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
692 if (!skb) {
693 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
694 "frame\n", dev->name);
695 return;
696 }
697 skb_reserve(skb, local->hw.extra_tx_headroom);
698
699 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
700 memset(mgmt, 0, 24);
701 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
702 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
703 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
704 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
705 IEEE80211_STYPE_DISASSOC);
706 skb_put(skb, 2);
707 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
708
709 ieee80211_sta_tx(dev, skb, 0);
710 }
711
712
713 static int ieee80211_privacy_mismatch(struct net_device *dev,
714 struct ieee80211_if_sta *ifsta)
715 {
716 struct ieee80211_sta_bss *bss;
717 int res = 0;
718
719 if (!ifsta || ifsta->mixed_cell || ifsta->key_management_enabled)
720 return 0;
721
722 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
723 if (!bss)
724 return 0;
725
726 if (ieee80211_sta_wep_configured(dev) !=
727 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
728 res = 1;
729
730 ieee80211_rx_bss_put(dev, bss);
731
732 return res;
733 }
734
735
736 static void ieee80211_associate(struct net_device *dev,
737 struct ieee80211_if_sta *ifsta)
738 {
739 ifsta->assoc_tries++;
740 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
741 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
742 " timed out\n",
743 dev->name, MAC_ARG(ifsta->bssid));
744 ifsta->state = IEEE80211_DISABLED;
745 return;
746 }
747
748 ifsta->state = IEEE80211_ASSOCIATE;
749 printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
750 dev->name, MAC_ARG(ifsta->bssid));
751 if (ieee80211_privacy_mismatch(dev, ifsta)) {
752 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
753 "mixed-cell disabled - abort association\n", dev->name);
754 ifsta->state = IEEE80211_DISABLED;
755 return;
756 }
757
758 ieee80211_send_assoc(dev, ifsta);
759
760 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
761 }
762
763
764 static void ieee80211_associated(struct net_device *dev,
765 struct ieee80211_if_sta *ifsta)
766 {
767 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
768 struct sta_info *sta;
769 int disassoc;
770
771 /* TODO: start monitoring current AP signal quality and number of
772 * missed beacons. Scan other channels every now and then and search
773 * for better APs. */
774 /* TODO: remove expired BSSes */
775
776 ifsta->state = IEEE80211_ASSOCIATED;
777
778 sta = sta_info_get(local, ifsta->bssid);
779 if (!sta) {
780 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
781 dev->name, MAC_ARG(ifsta->bssid));
782 disassoc = 1;
783 } else {
784 disassoc = 0;
785 if (time_after(jiffies,
786 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
787 if (ifsta->probereq_poll) {
788 printk(KERN_DEBUG "%s: No ProbeResp from "
789 "current AP " MAC_FMT " - assume out of "
790 "range\n",
791 dev->name, MAC_ARG(ifsta->bssid));
792 disassoc = 1;
793 sta_info_free(sta);
794 ifsta->probereq_poll = 0;
795 } else {
796 ieee80211_send_probe_req(dev, ifsta->bssid,
797 local->scan_ssid,
798 local->scan_ssid_len);
799 ifsta->probereq_poll = 1;
800 }
801 } else {
802 ifsta->probereq_poll = 0;
803 if (time_after(jiffies, ifsta->last_probe +
804 IEEE80211_PROBE_INTERVAL)) {
805 ifsta->last_probe = jiffies;
806 ieee80211_send_probe_req(dev, ifsta->bssid,
807 ifsta->ssid,
808 ifsta->ssid_len);
809 }
810 }
811 sta_info_put(sta);
812 }
813 if (disassoc) {
814 union iwreq_data wrqu;
815 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
816 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
817 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
818 mod_timer(&ifsta->timer, jiffies +
819 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
820 } else {
821 mod_timer(&ifsta->timer, jiffies +
822 IEEE80211_MONITORING_INTERVAL);
823 }
824 }
825
826
827 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
828 u8 *ssid, size_t ssid_len)
829 {
830 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
831 struct ieee80211_hw_mode *mode;
832 struct sk_buff *skb;
833 struct ieee80211_mgmt *mgmt;
834 u8 *pos, *supp_rates, *esupp_rates = NULL;
835 int i;
836
837 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
838 if (!skb) {
839 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
840 "request\n", dev->name);
841 return;
842 }
843 skb_reserve(skb, local->hw.extra_tx_headroom);
844
845 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
846 memset(mgmt, 0, 24);
847 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
848 IEEE80211_STYPE_PROBE_REQ);
849 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
850 if (dst) {
851 memcpy(mgmt->da, dst, ETH_ALEN);
852 memcpy(mgmt->bssid, dst, ETH_ALEN);
853 } else {
854 memset(mgmt->da, 0xff, ETH_ALEN);
855 memset(mgmt->bssid, 0xff, ETH_ALEN);
856 }
857 pos = skb_put(skb, 2 + ssid_len);
858 *pos++ = WLAN_EID_SSID;
859 *pos++ = ssid_len;
860 memcpy(pos, ssid, ssid_len);
861
862 supp_rates = skb_put(skb, 2);
863 supp_rates[0] = WLAN_EID_SUPP_RATES;
864 supp_rates[1] = 0;
865 mode = local->oper_hw_mode;
866 for (i = 0; i < mode->num_rates; i++) {
867 struct ieee80211_rate *rate = &mode->rates[i];
868 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
869 continue;
870 if (esupp_rates) {
871 pos = skb_put(skb, 1);
872 esupp_rates[1]++;
873 } else if (supp_rates[1] == 8) {
874 esupp_rates = skb_put(skb, 3);
875 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
876 esupp_rates[1] = 1;
877 pos = &esupp_rates[2];
878 } else {
879 pos = skb_put(skb, 1);
880 supp_rates[1]++;
881 }
882 if (mode->mode == MODE_ATHEROS_TURBO)
883 *pos = rate->rate / 10;
884 else
885 *pos = rate->rate / 5;
886 }
887
888 ieee80211_sta_tx(dev, skb, 0);
889 }
890
891
892 static int ieee80211_sta_wep_configured(struct net_device *dev)
893 {
894 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
895 if (!sdata || !sdata->default_key ||
896 sdata->default_key->alg != ALG_WEP)
897 return 0;
898 return 1;
899 }
900
901
902 static void ieee80211_auth_completed(struct net_device *dev,
903 struct ieee80211_if_sta *ifsta)
904 {
905 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
906 ifsta->authenticated = 1;
907 ieee80211_associate(dev, ifsta);
908 }
909
910
911 static void ieee80211_auth_challenge(struct net_device *dev,
912 struct ieee80211_if_sta *ifsta,
913 struct ieee80211_mgmt *mgmt,
914 size_t len)
915 {
916 u8 *pos;
917 struct ieee802_11_elems elems;
918
919 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
920 pos = mgmt->u.auth.variable;
921 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
922 == ParseFailed) {
923 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
924 dev->name);
925 return;
926 }
927 if (!elems.challenge) {
928 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
929 "frame\n", dev->name);
930 return;
931 }
932 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
933 elems.challenge_len + 2, 1);
934 }
935
936
937 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
938 struct ieee80211_if_sta *ifsta,
939 struct ieee80211_mgmt *mgmt,
940 size_t len)
941 {
942 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
943 u16 auth_alg, auth_transaction, status_code;
944
945 if (ifsta->state != IEEE80211_AUTHENTICATE &&
946 sdata->type != IEEE80211_IF_TYPE_IBSS) {
947 printk(KERN_DEBUG "%s: authentication frame received from "
948 MAC_FMT ", but not in authenticate state - ignored\n",
949 dev->name, MAC_ARG(mgmt->sa));
950 return;
951 }
952
953 if (len < 24 + 6) {
954 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
955 "received from " MAC_FMT " - ignored\n",
956 dev->name, len, MAC_ARG(mgmt->sa));
957 return;
958 }
959
960 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
961 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
962 printk(KERN_DEBUG "%s: authentication frame received from "
963 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
964 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
965 MAC_ARG(mgmt->bssid));
966 return;
967 }
968
969 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
970 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
971 printk(KERN_DEBUG "%s: authentication frame received from "
972 "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
973 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
974 MAC_ARG(mgmt->bssid));
975 return;
976 }
977
978 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
979 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
980 status_code = le16_to_cpu(mgmt->u.auth.status_code);
981
982 printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
983 "transaction=%d status=%d)\n",
984 dev->name, MAC_ARG(mgmt->sa), auth_alg,
985 auth_transaction, status_code);
986
987 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
988 /* IEEE 802.11 standard does not require authentication in IBSS
989 * networks and most implementations do not seem to use it.
990 * However, try to reply to authentication attempts if someone
991 * has actually implemented this.
992 * TODO: Could implement shared key authentication. */
993 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
994 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
995 "frame (alg=%d transaction=%d)\n",
996 dev->name, auth_alg, auth_transaction);
997 return;
998 }
999 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1000 }
1001
1002 if (auth_alg != ifsta->auth_alg ||
1003 auth_transaction != ifsta->auth_transaction) {
1004 printk(KERN_DEBUG "%s: unexpected authentication frame "
1005 "(alg=%d transaction=%d)\n",
1006 dev->name, auth_alg, auth_transaction);
1007 return;
1008 }
1009
1010 if (status_code != WLAN_STATUS_SUCCESS) {
1011 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1012 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1013 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1014 u8 algs[3];
1015 const int num_algs = ARRAY_SIZE(algs);
1016 int i, pos;
1017 algs[0] = algs[1] = algs[2] = 0xff;
1018 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1019 algs[0] = WLAN_AUTH_OPEN;
1020 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1021 algs[1] = WLAN_AUTH_SHARED_KEY;
1022 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1023 algs[2] = WLAN_AUTH_LEAP;
1024 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1025 pos = 0;
1026 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1027 pos = 1;
1028 else
1029 pos = 2;
1030 for (i = 0; i < num_algs; i++) {
1031 pos++;
1032 if (pos >= num_algs)
1033 pos = 0;
1034 if (algs[pos] == ifsta->auth_alg ||
1035 algs[pos] == 0xff)
1036 continue;
1037 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1038 !ieee80211_sta_wep_configured(dev))
1039 continue;
1040 ifsta->auth_alg = algs[pos];
1041 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1042 "next try\n",
1043 dev->name, ifsta->auth_alg);
1044 break;
1045 }
1046 }
1047 return;
1048 }
1049
1050 switch (ifsta->auth_alg) {
1051 case WLAN_AUTH_OPEN:
1052 case WLAN_AUTH_LEAP:
1053 ieee80211_auth_completed(dev, ifsta);
1054 break;
1055 case WLAN_AUTH_SHARED_KEY:
1056 if (ifsta->auth_transaction == 4)
1057 ieee80211_auth_completed(dev, ifsta);
1058 else
1059 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1060 break;
1061 }
1062 }
1063
1064
1065 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1066 struct ieee80211_if_sta *ifsta,
1067 struct ieee80211_mgmt *mgmt,
1068 size_t len)
1069 {
1070 u16 reason_code;
1071
1072 if (len < 24 + 2) {
1073 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1074 "received from " MAC_FMT " - ignored\n",
1075 dev->name, len, MAC_ARG(mgmt->sa));
1076 return;
1077 }
1078
1079 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1080 printk(KERN_DEBUG "%s: deauthentication frame received from "
1081 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1082 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1083 MAC_ARG(mgmt->bssid));
1084 return;
1085 }
1086
1087 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1088
1089 printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1090 " (reason=%d)\n",
1091 dev->name, MAC_ARG(mgmt->sa), reason_code);
1092
1093 if (ifsta->authenticated) {
1094 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1095 }
1096
1097 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1098 ifsta->state == IEEE80211_ASSOCIATE ||
1099 ifsta->state == IEEE80211_ASSOCIATED) {
1100 ifsta->state = IEEE80211_AUTHENTICATE;
1101 mod_timer(&ifsta->timer, jiffies +
1102 IEEE80211_RETRY_AUTH_INTERVAL);
1103 }
1104
1105 ieee80211_set_disassoc(dev, ifsta, 1);
1106 ifsta->authenticated = 0;
1107 }
1108
1109
1110 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1111 struct ieee80211_if_sta *ifsta,
1112 struct ieee80211_mgmt *mgmt,
1113 size_t len)
1114 {
1115 u16 reason_code;
1116
1117 if (len < 24 + 2) {
1118 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1119 "received from " MAC_FMT " - ignored\n",
1120 dev->name, len, MAC_ARG(mgmt->sa));
1121 return;
1122 }
1123
1124 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1125 printk(KERN_DEBUG "%s: disassociation frame received from "
1126 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1127 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1128 MAC_ARG(mgmt->bssid));
1129 return;
1130 }
1131
1132 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1133
1134 printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1135 " (reason=%d)\n",
1136 dev->name, MAC_ARG(mgmt->sa), reason_code);
1137
1138 if (ifsta->associated)
1139 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1140
1141 if (ifsta->state == IEEE80211_ASSOCIATED) {
1142 ifsta->state = IEEE80211_ASSOCIATE;
1143 mod_timer(&ifsta->timer, jiffies +
1144 IEEE80211_RETRY_AUTH_INTERVAL);
1145 }
1146
1147 ieee80211_set_disassoc(dev, ifsta, 0);
1148 }
1149
1150
1151 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1152 struct ieee80211_if_sta *ifsta,
1153 struct ieee80211_mgmt *mgmt,
1154 size_t len,
1155 int reassoc)
1156 {
1157 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1158 struct ieee80211_hw_mode *mode;
1159 struct sta_info *sta;
1160 u32 rates;
1161 u16 capab_info, status_code, aid;
1162 struct ieee802_11_elems elems;
1163 u8 *pos;
1164 int i, j;
1165
1166 /* AssocResp and ReassocResp have identical structure, so process both
1167 * of them in this function. */
1168
1169 if (ifsta->state != IEEE80211_ASSOCIATE) {
1170 printk(KERN_DEBUG "%s: association frame received from "
1171 MAC_FMT ", but not in associate state - ignored\n",
1172 dev->name, MAC_ARG(mgmt->sa));
1173 return;
1174 }
1175
1176 if (len < 24 + 6) {
1177 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1178 "received from " MAC_FMT " - ignored\n",
1179 dev->name, len, MAC_ARG(mgmt->sa));
1180 return;
1181 }
1182
1183 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1184 printk(KERN_DEBUG "%s: association frame received from "
1185 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1186 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1187 MAC_ARG(mgmt->bssid));
1188 return;
1189 }
1190
1191 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1192 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1193 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1194 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1195 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1196 "set\n", dev->name, aid);
1197 aid &= ~(BIT(15) | BIT(14));
1198
1199 printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1200 "status=%d aid=%d)\n",
1201 dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1202 capab_info, status_code, aid);
1203
1204 if (status_code != WLAN_STATUS_SUCCESS) {
1205 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1206 dev->name, status_code);
1207 /* if this was a reassociation, ensure we try a "full"
1208 * association next time. This works around some broken APs
1209 * which do not correctly reject reassociation requests. */
1210 ifsta->prev_bssid_set = 0;
1211 return;
1212 }
1213
1214 pos = mgmt->u.assoc_resp.variable;
1215 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1216 == ParseFailed) {
1217 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1218 dev->name);
1219 return;
1220 }
1221
1222 if (!elems.supp_rates) {
1223 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1224 dev->name);
1225 return;
1226 }
1227
1228 /* it probably doesn't, but if the frame includes an ERP value then
1229 * update our stored copy */
1230 if (elems.erp_info && elems.erp_info_len >= 1) {
1231 struct ieee80211_sta_bss *bss
1232 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1233 if (bss) {
1234 bss->erp_value = elems.erp_info[0];
1235 bss->has_erp_value = 1;
1236 ieee80211_rx_bss_put(dev, bss);
1237 }
1238 }
1239
1240 printk(KERN_DEBUG "%s: associated\n", dev->name);
1241 ifsta->aid = aid;
1242 ifsta->ap_capab = capab_info;
1243
1244 kfree(ifsta->assocresp_ies);
1245 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1246 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1247 if (ifsta->assocresp_ies)
1248 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1249
1250 ieee80211_set_associated(dev, ifsta, 1);
1251
1252 /* Add STA entry for the AP */
1253 sta = sta_info_get(local, ifsta->bssid);
1254 if (!sta) {
1255 struct ieee80211_sta_bss *bss;
1256 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1257 if (!sta) {
1258 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1259 " AP\n", dev->name);
1260 return;
1261 }
1262 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1263 if (bss) {
1264 sta->last_rssi = bss->rssi;
1265 sta->last_signal = bss->signal;
1266 sta->last_noise = bss->noise;
1267 ieee80211_rx_bss_put(dev, bss);
1268 }
1269 }
1270
1271 sta->dev = dev;
1272 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1273 sta->assoc_ap = 1;
1274
1275 rates = 0;
1276 mode = local->oper_hw_mode;
1277 for (i = 0; i < elems.supp_rates_len; i++) {
1278 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1279 if (mode->mode == MODE_ATHEROS_TURBO)
1280 rate *= 2;
1281 for (j = 0; j < mode->num_rates; j++)
1282 if (mode->rates[j].rate == rate)
1283 rates |= BIT(j);
1284 }
1285 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1286 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1287 if (mode->mode == MODE_ATHEROS_TURBO)
1288 rate *= 2;
1289 for (j = 0; j < mode->num_rates; j++)
1290 if (mode->rates[j].rate == rate)
1291 rates |= BIT(j);
1292 }
1293 sta->supp_rates = rates;
1294
1295 rate_control_rate_init(sta, local);
1296
1297 if (elems.wmm_param && ifsta->wmm_enabled) {
1298 sta->flags |= WLAN_STA_WME;
1299 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1300 elems.wmm_param_len);
1301 }
1302
1303
1304 sta_info_put(sta);
1305
1306 ieee80211_associated(dev, ifsta);
1307 }
1308
1309
1310 /* Caller must hold local->sta_bss_lock */
1311 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1312 struct ieee80211_sta_bss *bss)
1313 {
1314 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1315 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1316 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1317 }
1318
1319
1320 /* Caller must hold local->sta_bss_lock */
1321 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1322 struct ieee80211_sta_bss *bss)
1323 {
1324 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1325 struct ieee80211_sta_bss *b, *prev = NULL;
1326 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1327 while (b) {
1328 if (b == bss) {
1329 if (!prev)
1330 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1331 bss->hnext;
1332 else
1333 prev->hnext = bss->hnext;
1334 break;
1335 }
1336 prev = b;
1337 b = b->hnext;
1338 }
1339 }
1340
1341
1342 static struct ieee80211_sta_bss *
1343 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1344 {
1345 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1346 struct ieee80211_sta_bss *bss;
1347
1348 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1349 if (!bss)
1350 return NULL;
1351 atomic_inc(&bss->users);
1352 atomic_inc(&bss->users);
1353 memcpy(bss->bssid, bssid, ETH_ALEN);
1354
1355 spin_lock_bh(&local->sta_bss_lock);
1356 /* TODO: order by RSSI? */
1357 list_add_tail(&bss->list, &local->sta_bss_list);
1358 __ieee80211_rx_bss_hash_add(dev, bss);
1359 spin_unlock_bh(&local->sta_bss_lock);
1360 return bss;
1361 }
1362
1363
1364 static struct ieee80211_sta_bss *
1365 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1366 {
1367 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1368 struct ieee80211_sta_bss *bss;
1369
1370 spin_lock_bh(&local->sta_bss_lock);
1371 bss = local->sta_bss_hash[STA_HASH(bssid)];
1372 while (bss) {
1373 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1374 atomic_inc(&bss->users);
1375 break;
1376 }
1377 bss = bss->hnext;
1378 }
1379 spin_unlock_bh(&local->sta_bss_lock);
1380 return bss;
1381 }
1382
1383
1384 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1385 {
1386 kfree(bss->wpa_ie);
1387 kfree(bss->rsn_ie);
1388 kfree(bss->wmm_ie);
1389 kfree(bss);
1390 }
1391
1392
1393 static void ieee80211_rx_bss_put(struct net_device *dev,
1394 struct ieee80211_sta_bss *bss)
1395 {
1396 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1397 if (!atomic_dec_and_test(&bss->users))
1398 return;
1399
1400 spin_lock_bh(&local->sta_bss_lock);
1401 __ieee80211_rx_bss_hash_del(dev, bss);
1402 list_del(&bss->list);
1403 spin_unlock_bh(&local->sta_bss_lock);
1404 ieee80211_rx_bss_free(bss);
1405 }
1406
1407
1408 void ieee80211_rx_bss_list_init(struct net_device *dev)
1409 {
1410 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1411 spin_lock_init(&local->sta_bss_lock);
1412 INIT_LIST_HEAD(&local->sta_bss_list);
1413 }
1414
1415
1416 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1417 {
1418 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1419 struct ieee80211_sta_bss *bss, *tmp;
1420
1421 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1422 ieee80211_rx_bss_put(dev, bss);
1423 }
1424
1425
1426 static void ieee80211_rx_bss_info(struct net_device *dev,
1427 struct ieee80211_mgmt *mgmt,
1428 size_t len,
1429 struct ieee80211_rx_status *rx_status,
1430 int beacon)
1431 {
1432 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1433 struct ieee802_11_elems elems;
1434 size_t baselen;
1435 int channel, invalid = 0, clen;
1436 struct ieee80211_sta_bss *bss;
1437 struct sta_info *sta;
1438 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1439 u64 timestamp;
1440
1441 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1442 return; /* ignore ProbeResp to foreign address */
1443
1444 #if 0
1445 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1446 dev->name, beacon ? "Beacon" : "Probe Response",
1447 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1448 #endif
1449
1450 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1451 if (baselen > len)
1452 return;
1453
1454 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1455
1456 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1457 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1458 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1459 static unsigned long last_tsf_debug = 0;
1460 u64 tsf;
1461 if (local->ops->get_tsf)
1462 tsf = local->ops->get_tsf(local_to_hw(local));
1463 else
1464 tsf = -1LLU;
1465 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1466 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1467 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1468 "@%lu\n",
1469 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1470 (unsigned long long)tsf,
1471 (unsigned long long)timestamp,
1472 (unsigned long long)(tsf - timestamp),
1473 jiffies);
1474 last_tsf_debug = jiffies;
1475 }
1476 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1477 }
1478
1479 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1480 &elems) == ParseFailed)
1481 invalid = 1;
1482
1483 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1484 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1485 (sta = sta_info_get(local, mgmt->sa))) {
1486 struct ieee80211_hw_mode *mode;
1487 struct ieee80211_rate *rates;
1488 size_t num_rates;
1489 u32 supp_rates, prev_rates;
1490 int i, j;
1491
1492 mode = local->sta_scanning ?
1493 local->scan_hw_mode : local->oper_hw_mode;
1494 rates = mode->rates;
1495 num_rates = mode->num_rates;
1496
1497 supp_rates = 0;
1498 for (i = 0; i < elems.supp_rates_len +
1499 elems.ext_supp_rates_len; i++) {
1500 u8 rate = 0;
1501 int own_rate;
1502 if (i < elems.supp_rates_len)
1503 rate = elems.supp_rates[i];
1504 else if (elems.ext_supp_rates)
1505 rate = elems.ext_supp_rates
1506 [i - elems.supp_rates_len];
1507 own_rate = 5 * (rate & 0x7f);
1508 if (mode->mode == MODE_ATHEROS_TURBO)
1509 own_rate *= 2;
1510 for (j = 0; j < num_rates; j++)
1511 if (rates[j].rate == own_rate)
1512 supp_rates |= BIT(j);
1513 }
1514
1515 prev_rates = sta->supp_rates;
1516 sta->supp_rates &= supp_rates;
1517 if (sta->supp_rates == 0) {
1518 /* No matching rates - this should not really happen.
1519 * Make sure that at least one rate is marked
1520 * supported to avoid issues with TX rate ctrl. */
1521 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1522 }
1523 if (sta->supp_rates != prev_rates) {
1524 printk(KERN_DEBUG "%s: updated supp_rates set for "
1525 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1526 "0x%x)\n",
1527 dev->name, MAC_ARG(sta->addr), prev_rates,
1528 supp_rates, sta->supp_rates);
1529 }
1530 sta_info_put(sta);
1531 }
1532
1533 if (!elems.ssid)
1534 return;
1535
1536 if (elems.ds_params && elems.ds_params_len == 1)
1537 channel = elems.ds_params[0];
1538 else
1539 channel = rx_status->channel;
1540
1541 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1542 if (!bss) {
1543 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1544 if (!bss)
1545 return;
1546 } else {
1547 #if 0
1548 /* TODO: order by RSSI? */
1549 spin_lock_bh(&local->sta_bss_lock);
1550 list_move_tail(&bss->list, &local->sta_bss_list);
1551 spin_unlock_bh(&local->sta_bss_lock);
1552 #endif
1553 }
1554
1555 if (bss->probe_resp && beacon) {
1556 /* Do not allow beacon to override data from Probe Response. */
1557 ieee80211_rx_bss_put(dev, bss);
1558 return;
1559 }
1560
1561 /* save the ERP value so that it is available at association time */
1562 if (elems.erp_info && elems.erp_info_len >= 1) {
1563 bss->erp_value = elems.erp_info[0];
1564 bss->has_erp_value = 1;
1565 }
1566
1567 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1568 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1569 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1570 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1571 bss->ssid_len = elems.ssid_len;
1572 }
1573
1574 bss->supp_rates_len = 0;
1575 if (elems.supp_rates) {
1576 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1577 if (clen > elems.supp_rates_len)
1578 clen = elems.supp_rates_len;
1579 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1580 clen);
1581 bss->supp_rates_len += clen;
1582 }
1583 if (elems.ext_supp_rates) {
1584 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1585 if (clen > elems.ext_supp_rates_len)
1586 clen = elems.ext_supp_rates_len;
1587 memcpy(&bss->supp_rates[bss->supp_rates_len],
1588 elems.ext_supp_rates, clen);
1589 bss->supp_rates_len += clen;
1590 }
1591
1592 if (elems.wpa &&
1593 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1594 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1595 kfree(bss->wpa_ie);
1596 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1597 if (bss->wpa_ie) {
1598 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1599 bss->wpa_ie_len = elems.wpa_len + 2;
1600 } else
1601 bss->wpa_ie_len = 0;
1602 } else if (!elems.wpa && bss->wpa_ie) {
1603 kfree(bss->wpa_ie);
1604 bss->wpa_ie = NULL;
1605 bss->wpa_ie_len = 0;
1606 }
1607
1608 if (elems.rsn &&
1609 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1610 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1611 kfree(bss->rsn_ie);
1612 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1613 if (bss->rsn_ie) {
1614 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1615 bss->rsn_ie_len = elems.rsn_len + 2;
1616 } else
1617 bss->rsn_ie_len = 0;
1618 } else if (!elems.rsn && bss->rsn_ie) {
1619 kfree(bss->rsn_ie);
1620 bss->rsn_ie = NULL;
1621 bss->rsn_ie_len = 0;
1622 }
1623
1624 if (elems.wmm_param &&
1625 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1626 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1627 kfree(bss->wmm_ie);
1628 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1629 if (bss->wmm_ie) {
1630 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1631 elems.wmm_param_len + 2);
1632 bss->wmm_ie_len = elems.wmm_param_len + 2;
1633 } else
1634 bss->wmm_ie_len = 0;
1635 } else if (!elems.wmm_param && bss->wmm_ie) {
1636 kfree(bss->wmm_ie);
1637 bss->wmm_ie = NULL;
1638 bss->wmm_ie_len = 0;
1639 }
1640
1641
1642 bss->hw_mode = rx_status->phymode;
1643 bss->channel = channel;
1644 bss->freq = rx_status->freq;
1645 if (channel != rx_status->channel &&
1646 (bss->hw_mode == MODE_IEEE80211G ||
1647 bss->hw_mode == MODE_IEEE80211B) &&
1648 channel >= 1 && channel <= 14) {
1649 static const int freq_list[] = {
1650 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1651 2447, 2452, 2457, 2462, 2467, 2472, 2484
1652 };
1653 /* IEEE 802.11g/b mode can receive packets from neighboring
1654 * channels, so map the channel into frequency. */
1655 bss->freq = freq_list[channel - 1];
1656 }
1657 bss->timestamp = timestamp;
1658 bss->last_update = jiffies;
1659 bss->rssi = rx_status->ssi;
1660 bss->signal = rx_status->signal;
1661 bss->noise = rx_status->noise;
1662 if (!beacon)
1663 bss->probe_resp++;
1664 ieee80211_rx_bss_put(dev, bss);
1665 }
1666
1667
1668 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1669 struct ieee80211_mgmt *mgmt,
1670 size_t len,
1671 struct ieee80211_rx_status *rx_status)
1672 {
1673 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1674 }
1675
1676
1677 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1678 struct ieee80211_mgmt *mgmt,
1679 size_t len,
1680 struct ieee80211_rx_status *rx_status)
1681 {
1682 struct ieee80211_sub_if_data *sdata;
1683 struct ieee80211_if_sta *ifsta;
1684 size_t baselen;
1685 struct ieee802_11_elems elems;
1686
1687 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1688
1689 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1690 if (sdata->type != IEEE80211_IF_TYPE_STA)
1691 return;
1692 ifsta = &sdata->u.sta;
1693
1694 if (!ifsta->associated ||
1695 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1696 return;
1697
1698 /* Process beacon from the current BSS */
1699 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1700 if (baselen > len)
1701 return;
1702
1703 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1704 &elems) == ParseFailed)
1705 return;
1706
1707 if (elems.erp_info && elems.erp_info_len >= 1)
1708 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1709
1710 if (elems.wmm_param && ifsta->wmm_enabled) {
1711 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1712 elems.wmm_param_len);
1713 }
1714 }
1715
1716
1717 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1718 struct ieee80211_if_sta *ifsta,
1719 struct ieee80211_mgmt *mgmt,
1720 size_t len,
1721 struct ieee80211_rx_status *rx_status)
1722 {
1723 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1724 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1725 int tx_last_beacon;
1726 struct sk_buff *skb;
1727 struct ieee80211_mgmt *resp;
1728 u8 *pos, *end;
1729
1730 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1731 ifsta->state != IEEE80211_IBSS_JOINED ||
1732 len < 24 + 2 || !ifsta->probe_resp)
1733 return;
1734
1735 if (local->ops->tx_last_beacon)
1736 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1737 else
1738 tx_last_beacon = 1;
1739
1740 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1741 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1742 MAC_FMT " (tx_last_beacon=%d)\n",
1743 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1744 MAC_ARG(mgmt->bssid), tx_last_beacon);
1745 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1746
1747 if (!tx_last_beacon)
1748 return;
1749
1750 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1751 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1752 return;
1753
1754 end = ((u8 *) mgmt) + len;
1755 pos = mgmt->u.probe_req.variable;
1756 if (pos[0] != WLAN_EID_SSID ||
1757 pos + 2 + pos[1] > end) {
1758 if (net_ratelimit()) {
1759 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1760 "from " MAC_FMT "\n",
1761 dev->name, MAC_ARG(mgmt->sa));
1762 }
1763 return;
1764 }
1765 if (pos[1] != 0 &&
1766 (pos[1] != ifsta->ssid_len ||
1767 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1768 /* Ignore ProbeReq for foreign SSID */
1769 return;
1770 }
1771
1772 /* Reply with ProbeResp */
1773 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1774 if (!skb)
1775 return;
1776
1777 resp = (struct ieee80211_mgmt *) skb->data;
1778 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1779 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1780 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1781 dev->name, MAC_ARG(resp->da));
1782 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1783 ieee80211_sta_tx(dev, skb, 0);
1784 }
1785
1786
1787 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1788 struct ieee80211_rx_status *rx_status)
1789 {
1790 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1791 struct ieee80211_sub_if_data *sdata;
1792 struct ieee80211_if_sta *ifsta;
1793 struct ieee80211_mgmt *mgmt;
1794 u16 fc;
1795
1796 if (skb->len < 24)
1797 goto fail;
1798
1799 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1800 ifsta = &sdata->u.sta;
1801
1802 mgmt = (struct ieee80211_mgmt *) skb->data;
1803 fc = le16_to_cpu(mgmt->frame_control);
1804
1805 switch (fc & IEEE80211_FCTL_STYPE) {
1806 case IEEE80211_STYPE_PROBE_REQ:
1807 case IEEE80211_STYPE_PROBE_RESP:
1808 case IEEE80211_STYPE_BEACON:
1809 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1810 case IEEE80211_STYPE_AUTH:
1811 case IEEE80211_STYPE_ASSOC_RESP:
1812 case IEEE80211_STYPE_REASSOC_RESP:
1813 case IEEE80211_STYPE_DEAUTH:
1814 case IEEE80211_STYPE_DISASSOC:
1815 skb_queue_tail(&ifsta->skb_queue, skb);
1816 queue_work(local->hw.workqueue, &ifsta->work);
1817 return;
1818 default:
1819 printk(KERN_DEBUG "%s: received unknown management frame - "
1820 "stype=%d\n", dev->name,
1821 (fc & IEEE80211_FCTL_STYPE) >> 4);
1822 break;
1823 }
1824
1825 fail:
1826 kfree_skb(skb);
1827 }
1828
1829
1830 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1831 struct sk_buff *skb)
1832 {
1833 struct ieee80211_rx_status *rx_status;
1834 struct ieee80211_sub_if_data *sdata;
1835 struct ieee80211_if_sta *ifsta;
1836 struct ieee80211_mgmt *mgmt;
1837 u16 fc;
1838
1839 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1840 ifsta = &sdata->u.sta;
1841
1842 rx_status = (struct ieee80211_rx_status *) skb->cb;
1843 mgmt = (struct ieee80211_mgmt *) skb->data;
1844 fc = le16_to_cpu(mgmt->frame_control);
1845
1846 switch (fc & IEEE80211_FCTL_STYPE) {
1847 case IEEE80211_STYPE_PROBE_REQ:
1848 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1849 rx_status);
1850 break;
1851 case IEEE80211_STYPE_PROBE_RESP:
1852 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1853 break;
1854 case IEEE80211_STYPE_BEACON:
1855 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1856 break;
1857 case IEEE80211_STYPE_AUTH:
1858 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1859 break;
1860 case IEEE80211_STYPE_ASSOC_RESP:
1861 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1862 break;
1863 case IEEE80211_STYPE_REASSOC_RESP:
1864 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1865 break;
1866 case IEEE80211_STYPE_DEAUTH:
1867 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1868 break;
1869 case IEEE80211_STYPE_DISASSOC:
1870 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1871 break;
1872 }
1873
1874 kfree_skb(skb);
1875 }
1876
1877
1878 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1879 struct ieee80211_rx_status *rx_status)
1880 {
1881 struct ieee80211_mgmt *mgmt;
1882 u16 fc;
1883
1884 if (skb->len < 24) {
1885 dev_kfree_skb(skb);
1886 return;
1887 }
1888
1889 mgmt = (struct ieee80211_mgmt *) skb->data;
1890 fc = le16_to_cpu(mgmt->frame_control);
1891
1892 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1893 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1894 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1895 skb->len, rx_status);
1896 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1897 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1898 rx_status);
1899 }
1900 }
1901
1902 dev_kfree_skb(skb);
1903 }
1904
1905
1906 static int ieee80211_sta_active_ibss(struct net_device *dev)
1907 {
1908 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1909 int active = 0;
1910 struct sta_info *sta;
1911
1912 read_lock_bh(&local->sta_lock);
1913 list_for_each_entry(sta, &local->sta_list, list) {
1914 if (sta->dev == dev &&
1915 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1916 jiffies)) {
1917 active++;
1918 break;
1919 }
1920 }
1921 read_unlock_bh(&local->sta_lock);
1922
1923 return active;
1924 }
1925
1926
1927 static void ieee80211_sta_expire(struct net_device *dev)
1928 {
1929 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1930 struct sta_info *sta, *tmp;
1931 LIST_HEAD(tmp_list);
1932
1933 write_lock_bh(&local->sta_lock);
1934 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1935 if (time_after(jiffies, sta->last_rx +
1936 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1937 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1938 "\n", dev->name, MAC_ARG(sta->addr));
1939 __sta_info_get(sta);
1940 sta_info_remove(sta);
1941 list_add(&sta->list, &tmp_list);
1942 }
1943 write_unlock_bh(&local->sta_lock);
1944
1945 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1946 sta_info_free(sta);
1947 sta_info_put(sta);
1948 }
1949 }
1950
1951
1952 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1953 struct ieee80211_if_sta *ifsta)
1954 {
1955 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1956
1957 ieee80211_sta_expire(dev);
1958 if (ieee80211_sta_active_ibss(dev))
1959 return;
1960
1961 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1962 "IBSS networks with same SSID (merge)\n", dev->name);
1963 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1964 }
1965
1966
1967 void ieee80211_sta_timer(unsigned long data)
1968 {
1969 struct ieee80211_sub_if_data *sdata =
1970 (struct ieee80211_sub_if_data *) data;
1971 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1972 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1973
1974 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1975 queue_work(local->hw.workqueue, &ifsta->work);
1976 }
1977
1978
1979 void ieee80211_sta_work(struct work_struct *work)
1980 {
1981 struct ieee80211_sub_if_data *sdata =
1982 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1983 struct net_device *dev = sdata->dev;
1984 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1985 struct ieee80211_if_sta *ifsta;
1986 struct sk_buff *skb;
1987
1988 if (!netif_running(dev))
1989 return;
1990
1991 if (local->sta_scanning)
1992 return;
1993
1994 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1995 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1996 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1997 "(type=%d)\n", dev->name, sdata->type);
1998 return;
1999 }
2000 ifsta = &sdata->u.sta;
2001
2002 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2003 ieee80211_sta_rx_queued_mgmt(dev, skb);
2004
2005 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2006 ifsta->state != IEEE80211_ASSOCIATE &&
2007 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2008 ieee80211_sta_start_scan(dev, NULL, 0);
2009 return;
2010 }
2011
2012 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2013 if (ieee80211_sta_config_auth(dev, ifsta))
2014 return;
2015 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2016 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2017 return;
2018
2019 switch (ifsta->state) {
2020 case IEEE80211_DISABLED:
2021 break;
2022 case IEEE80211_AUTHENTICATE:
2023 ieee80211_authenticate(dev, ifsta);
2024 break;
2025 case IEEE80211_ASSOCIATE:
2026 ieee80211_associate(dev, ifsta);
2027 break;
2028 case IEEE80211_ASSOCIATED:
2029 ieee80211_associated(dev, ifsta);
2030 break;
2031 case IEEE80211_IBSS_SEARCH:
2032 ieee80211_sta_find_ibss(dev, ifsta);
2033 break;
2034 case IEEE80211_IBSS_JOINED:
2035 ieee80211_sta_merge_ibss(dev, ifsta);
2036 break;
2037 default:
2038 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2039 ifsta->state);
2040 break;
2041 }
2042
2043 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2044 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2045 "mixed-cell disabled - disassociate\n", dev->name);
2046
2047 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2048 ieee80211_set_disassoc(dev, ifsta, 0);
2049 }
2050 }
2051
2052
2053 static void ieee80211_sta_reset_auth(struct net_device *dev,
2054 struct ieee80211_if_sta *ifsta)
2055 {
2056 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2057
2058 if (local->ops->reset_tsf) {
2059 /* Reset own TSF to allow time synchronization work. */
2060 local->ops->reset_tsf(local_to_hw(local));
2061 }
2062
2063 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2064
2065
2066 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2067 ifsta->auth_alg = WLAN_AUTH_OPEN;
2068 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2069 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2070 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2071 ifsta->auth_alg = WLAN_AUTH_LEAP;
2072 else
2073 ifsta->auth_alg = WLAN_AUTH_OPEN;
2074 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2075 ifsta->auth_alg);
2076 ifsta->auth_transaction = -1;
2077 ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2078 netif_carrier_off(dev);
2079 }
2080
2081
2082 void ieee80211_sta_req_auth(struct net_device *dev,
2083 struct ieee80211_if_sta *ifsta)
2084 {
2085 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2086 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2087
2088 if (sdata->type != IEEE80211_IF_TYPE_STA)
2089 return;
2090
2091 if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2092 (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2093 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2094 queue_work(local->hw.workqueue, &ifsta->work);
2095 }
2096 }
2097
2098 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2099 const char *ssid, int ssid_len)
2100 {
2101 int tmp, hidden_ssid;
2102
2103 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2104 return 1;
2105
2106 if (ifsta->auto_bssid_sel)
2107 return 0;
2108
2109 hidden_ssid = 1;
2110 tmp = ssid_len;
2111 while (tmp--) {
2112 if (ssid[tmp] != '\0') {
2113 hidden_ssid = 0;
2114 break;
2115 }
2116 }
2117
2118 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2119 return 1;
2120
2121 if (ssid_len == 1 && ssid[0] == ' ')
2122 return 1;
2123
2124 return 0;
2125 }
2126
2127 static int ieee80211_sta_config_auth(struct net_device *dev,
2128 struct ieee80211_if_sta *ifsta)
2129 {
2130 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2131 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2132 struct ieee80211_sta_bss *bss, *selected = NULL;
2133 int top_rssi = 0, freq;
2134
2135 if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2136 !ifsta->auto_ssid_sel) {
2137 ifsta->state = IEEE80211_AUTHENTICATE;
2138 ieee80211_sta_reset_auth(dev, ifsta);
2139 return 0;
2140 }
2141
2142 spin_lock_bh(&local->sta_bss_lock);
2143 freq = local->oper_channel->freq;
2144 list_for_each_entry(bss, &local->sta_bss_list, list) {
2145 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2146 continue;
2147
2148 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2149 !!sdata->default_key)
2150 continue;
2151
2152 if (!ifsta->auto_channel_sel && bss->freq != freq)
2153 continue;
2154
2155 if (!ifsta->auto_bssid_sel &&
2156 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2157 continue;
2158
2159 if (!ifsta->auto_ssid_sel &&
2160 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2161 continue;
2162
2163 if (!selected || top_rssi < bss->rssi) {
2164 selected = bss;
2165 top_rssi = bss->rssi;
2166 }
2167 }
2168 if (selected)
2169 atomic_inc(&selected->users);
2170 spin_unlock_bh(&local->sta_bss_lock);
2171
2172 if (selected) {
2173 ieee80211_set_channel(local, -1, selected->freq);
2174 if (!ifsta->ssid_set)
2175 ieee80211_sta_set_ssid(dev, selected->ssid,
2176 selected->ssid_len);
2177 ieee80211_sta_set_bssid(dev, selected->bssid);
2178 ieee80211_rx_bss_put(dev, selected);
2179 ifsta->state = IEEE80211_AUTHENTICATE;
2180 ieee80211_sta_reset_auth(dev, ifsta);
2181 return 0;
2182 } else {
2183 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2184 if (ifsta->auto_ssid_sel)
2185 ieee80211_sta_start_scan(dev, NULL, 0);
2186 else
2187 ieee80211_sta_start_scan(dev, ifsta->ssid,
2188 ifsta->ssid_len);
2189 ifsta->state = IEEE80211_AUTHENTICATE;
2190 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2191 } else
2192 ifsta->state = IEEE80211_DISABLED;
2193 }
2194 return -1;
2195 }
2196
2197 static int ieee80211_sta_join_ibss(struct net_device *dev,
2198 struct ieee80211_if_sta *ifsta,
2199 struct ieee80211_sta_bss *bss)
2200 {
2201 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2202 int res, rates, i, j;
2203 struct sk_buff *skb;
2204 struct ieee80211_mgmt *mgmt;
2205 struct ieee80211_tx_control control;
2206 struct ieee80211_rate *rate;
2207 struct ieee80211_hw_mode *mode;
2208 struct rate_control_extra extra;
2209 u8 *pos;
2210 struct ieee80211_sub_if_data *sdata;
2211
2212 /* Remove possible STA entries from other IBSS networks. */
2213 sta_info_flush(local, NULL);
2214
2215 if (local->ops->reset_tsf) {
2216 /* Reset own TSF to allow time synchronization work. */
2217 local->ops->reset_tsf(local_to_hw(local));
2218 }
2219 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2220 res = ieee80211_if_config(dev);
2221 if (res)
2222 return res;
2223
2224 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2225
2226 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2227 sdata->drop_unencrypted = bss->capability &
2228 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2229
2230 res = ieee80211_set_channel(local, -1, bss->freq);
2231
2232 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2233 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2234 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2235 local->hw.conf.freq);
2236 return -1;
2237 }
2238
2239 /* Set beacon template based on scan results */
2240 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2241 do {
2242 if (!skb)
2243 break;
2244
2245 skb_reserve(skb, local->hw.extra_tx_headroom);
2246
2247 mgmt = (struct ieee80211_mgmt *)
2248 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2249 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2250 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2251 IEEE80211_STYPE_BEACON);
2252 memset(mgmt->da, 0xff, ETH_ALEN);
2253 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2254 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2255 mgmt->u.beacon.beacon_int =
2256 cpu_to_le16(local->hw.conf.beacon_int);
2257 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2258
2259 pos = skb_put(skb, 2 + ifsta->ssid_len);
2260 *pos++ = WLAN_EID_SSID;
2261 *pos++ = ifsta->ssid_len;
2262 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2263
2264 rates = bss->supp_rates_len;
2265 if (rates > 8)
2266 rates = 8;
2267 pos = skb_put(skb, 2 + rates);
2268 *pos++ = WLAN_EID_SUPP_RATES;
2269 *pos++ = rates;
2270 memcpy(pos, bss->supp_rates, rates);
2271
2272 pos = skb_put(skb, 2 + 1);
2273 *pos++ = WLAN_EID_DS_PARAMS;
2274 *pos++ = 1;
2275 *pos++ = bss->channel;
2276
2277 pos = skb_put(skb, 2 + 2);
2278 *pos++ = WLAN_EID_IBSS_PARAMS;
2279 *pos++ = 2;
2280 /* FIX: set ATIM window based on scan results */
2281 *pos++ = 0;
2282 *pos++ = 0;
2283
2284 if (bss->supp_rates_len > 8) {
2285 rates = bss->supp_rates_len - 8;
2286 pos = skb_put(skb, 2 + rates);
2287 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2288 *pos++ = rates;
2289 memcpy(pos, &bss->supp_rates[8], rates);
2290 }
2291
2292 memset(&control, 0, sizeof(control));
2293 memset(&extra, 0, sizeof(extra));
2294 extra.mode = local->oper_hw_mode;
2295 rate = rate_control_get_rate(local, dev, skb, &extra);
2296 if (!rate) {
2297 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2298 "for IBSS beacon\n", dev->name);
2299 break;
2300 }
2301 control.tx_rate = (sdata->short_preamble &&
2302 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2303 rate->val2 : rate->val;
2304 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2305 control.power_level = local->hw.conf.power_level;
2306 control.flags |= IEEE80211_TXCTL_NO_ACK;
2307 control.retry_limit = 1;
2308
2309 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2310 if (ifsta->probe_resp) {
2311 mgmt = (struct ieee80211_mgmt *)
2312 ifsta->probe_resp->data;
2313 mgmt->frame_control =
2314 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2315 IEEE80211_STYPE_PROBE_RESP);
2316 } else {
2317 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2318 "template for IBSS\n", dev->name);
2319 }
2320
2321 if (local->ops->beacon_update &&
2322 local->ops->beacon_update(local_to_hw(local),
2323 skb, &control) == 0) {
2324 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2325 "template based on scan results\n", dev->name);
2326 skb = NULL;
2327 }
2328
2329 rates = 0;
2330 mode = local->oper_hw_mode;
2331 for (i = 0; i < bss->supp_rates_len; i++) {
2332 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2333 if (mode->mode == MODE_ATHEROS_TURBO)
2334 bitrate *= 2;
2335 for (j = 0; j < mode->num_rates; j++)
2336 if (mode->rates[j].rate == bitrate)
2337 rates |= BIT(j);
2338 }
2339 ifsta->supp_rates_bits = rates;
2340 } while (0);
2341
2342 if (skb) {
2343 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2344 "template\n", dev->name);
2345 dev_kfree_skb(skb);
2346 }
2347
2348 ifsta->state = IEEE80211_IBSS_JOINED;
2349 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2350
2351 ieee80211_rx_bss_put(dev, bss);
2352
2353 return res;
2354 }
2355
2356
2357 static int ieee80211_sta_create_ibss(struct net_device *dev,
2358 struct ieee80211_if_sta *ifsta)
2359 {
2360 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2361 struct ieee80211_sta_bss *bss;
2362 struct ieee80211_sub_if_data *sdata;
2363 struct ieee80211_hw_mode *mode;
2364 u8 bssid[ETH_ALEN], *pos;
2365 int i;
2366
2367 #if 0
2368 /* Easier testing, use fixed BSSID. */
2369 memset(bssid, 0xfe, ETH_ALEN);
2370 #else
2371 /* Generate random, not broadcast, locally administered BSSID. Mix in
2372 * own MAC address to make sure that devices that do not have proper
2373 * random number generator get different BSSID. */
2374 get_random_bytes(bssid, ETH_ALEN);
2375 for (i = 0; i < ETH_ALEN; i++)
2376 bssid[i] ^= dev->dev_addr[i];
2377 bssid[0] &= ~0x01;
2378 bssid[0] |= 0x02;
2379 #endif
2380
2381 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2382 dev->name, MAC_ARG(bssid));
2383
2384 bss = ieee80211_rx_bss_add(dev, bssid);
2385 if (!bss)
2386 return -ENOMEM;
2387
2388 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2389 mode = local->oper_hw_mode;
2390
2391 if (local->hw.conf.beacon_int == 0)
2392 local->hw.conf.beacon_int = 100;
2393 bss->beacon_int = local->hw.conf.beacon_int;
2394 bss->hw_mode = local->hw.conf.phymode;
2395 bss->channel = local->hw.conf.channel;
2396 bss->freq = local->hw.conf.freq;
2397 bss->last_update = jiffies;
2398 bss->capability = WLAN_CAPABILITY_IBSS;
2399 if (sdata->default_key) {
2400 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2401 } else
2402 sdata->drop_unencrypted = 0;
2403 bss->supp_rates_len = mode->num_rates;
2404 pos = bss->supp_rates;
2405 for (i = 0; i < mode->num_rates; i++) {
2406 int rate = mode->rates[i].rate;
2407 if (mode->mode == MODE_ATHEROS_TURBO)
2408 rate /= 2;
2409 *pos++ = (u8) (rate / 5);
2410 }
2411
2412 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2413 }
2414
2415
2416 static int ieee80211_sta_find_ibss(struct net_device *dev,
2417 struct ieee80211_if_sta *ifsta)
2418 {
2419 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2420 struct ieee80211_sta_bss *bss;
2421 int found = 0;
2422 u8 bssid[ETH_ALEN];
2423 int active_ibss;
2424
2425 if (ifsta->ssid_len == 0)
2426 return -EINVAL;
2427
2428 active_ibss = ieee80211_sta_active_ibss(dev);
2429 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2430 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2431 dev->name, active_ibss);
2432 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2433 spin_lock_bh(&local->sta_bss_lock);
2434 list_for_each_entry(bss, &local->sta_bss_list, list) {
2435 if (ifsta->ssid_len != bss->ssid_len ||
2436 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2437 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2438 continue;
2439 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2440 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2441 MAC_ARG(bss->bssid));
2442 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2443 memcpy(bssid, bss->bssid, ETH_ALEN);
2444 found = 1;
2445 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2446 break;
2447 }
2448 spin_unlock_bh(&local->sta_bss_lock);
2449
2450 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2451 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2452 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2453 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2454 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2455 (bss = ieee80211_rx_bss_get(dev, bssid))) {
2456 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2457 " based on configured SSID\n",
2458 dev->name, MAC_ARG(bssid));
2459 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2460 }
2461 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2462 printk(KERN_DEBUG " did not try to join ibss\n");
2463 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2464
2465 /* Selected IBSS not found in current scan results - try to scan */
2466 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2467 !ieee80211_sta_active_ibss(dev)) {
2468 mod_timer(&ifsta->timer, jiffies +
2469 IEEE80211_IBSS_MERGE_INTERVAL);
2470 } else if (time_after(jiffies, local->last_scan_completed +
2471 IEEE80211_SCAN_INTERVAL)) {
2472 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2473 "join\n", dev->name);
2474 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2475 ifsta->ssid_len);
2476 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2477 int interval = IEEE80211_SCAN_INTERVAL;
2478
2479 if (time_after(jiffies, ifsta->ibss_join_req +
2480 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2481 if (ifsta->create_ibss &&
2482 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2483 return ieee80211_sta_create_ibss(dev, ifsta);
2484 if (ifsta->create_ibss) {
2485 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2486 " configured channel %d (%d MHz)\n",
2487 dev->name, local->hw.conf.channel,
2488 local->hw.conf.freq);
2489 }
2490
2491 /* No IBSS found - decrease scan interval and continue
2492 * scanning. */
2493 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2494 }
2495
2496 ifsta->state = IEEE80211_IBSS_SEARCH;
2497 mod_timer(&ifsta->timer, jiffies + interval);
2498 return 0;
2499 }
2500
2501 return 0;
2502 }
2503
2504
2505 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2506 {
2507 struct ieee80211_sub_if_data *sdata;
2508 struct ieee80211_if_sta *ifsta;
2509 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2510
2511 if (len > IEEE80211_MAX_SSID_LEN)
2512 return -EINVAL;
2513
2514 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2515 * not defined. */
2516 if (local->ops->conf_tx) {
2517 struct ieee80211_tx_queue_params qparam;
2518 int i;
2519
2520 memset(&qparam, 0, sizeof(qparam));
2521 /* TODO: are these ok defaults for all hw_modes? */
2522 qparam.aifs = 2;
2523 qparam.cw_min =
2524 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2525 qparam.cw_max = 1023;
2526 qparam.burst_time = 0;
2527 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2528 {
2529 local->ops->conf_tx(local_to_hw(local),
2530 i + IEEE80211_TX_QUEUE_DATA0,
2531 &qparam);
2532 }
2533 /* IBSS uses different parameters for Beacon sending */
2534 qparam.cw_min++;
2535 qparam.cw_min *= 2;
2536 qparam.cw_min--;
2537 local->ops->conf_tx(local_to_hw(local),
2538 IEEE80211_TX_QUEUE_BEACON, &qparam);
2539 }
2540
2541 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2542 ifsta = &sdata->u.sta;
2543
2544 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2545 ifsta->prev_bssid_set = 0;
2546 memcpy(ifsta->ssid, ssid, len);
2547 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2548 ifsta->ssid_len = len;
2549
2550 ifsta->ssid_set = len ? 1 : 0;
2551 if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2552 ifsta->ibss_join_req = jiffies;
2553 ifsta->state = IEEE80211_IBSS_SEARCH;
2554 return ieee80211_sta_find_ibss(dev, ifsta);
2555 }
2556 return 0;
2557 }
2558
2559
2560 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2561 {
2562 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2563 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2564 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2565 *len = ifsta->ssid_len;
2566 return 0;
2567 }
2568
2569
2570 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2571 {
2572 struct ieee80211_sub_if_data *sdata;
2573 struct ieee80211_if_sta *ifsta;
2574 int res;
2575
2576 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2577 ifsta = &sdata->u.sta;
2578
2579 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2580 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2581 res = ieee80211_if_config(dev);
2582 if (res) {
2583 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2584 "the low-level driver\n", dev->name);
2585 return res;
2586 }
2587 }
2588
2589 if (!is_valid_ether_addr(bssid))
2590 ifsta->bssid_set = 0;
2591 else
2592 ifsta->bssid_set = 1;
2593 return 0;
2594 }
2595
2596
2597 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2598 struct ieee80211_sub_if_data *sdata,
2599 int powersave)
2600 {
2601 struct sk_buff *skb;
2602 struct ieee80211_hdr *nullfunc;
2603 u16 fc;
2604
2605 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2606 if (!skb) {
2607 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2608 "frame\n", sdata->dev->name);
2609 return;
2610 }
2611 skb_reserve(skb, local->hw.extra_tx_headroom);
2612
2613 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2614 memset(nullfunc, 0, 24);
2615 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2616 IEEE80211_FCTL_TODS;
2617 if (powersave)
2618 fc |= IEEE80211_FCTL_PM;
2619 nullfunc->frame_control = cpu_to_le16(fc);
2620 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2621 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2622 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2623
2624 ieee80211_sta_tx(sdata->dev, skb, 0);
2625 }
2626
2627
2628 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2629 {
2630 struct ieee80211_local *local = hw_to_local(hw);
2631 struct net_device *dev = local->scan_dev;
2632 struct ieee80211_sub_if_data *sdata;
2633 union iwreq_data wrqu;
2634
2635 local->last_scan_completed = jiffies;
2636 wmb();
2637 local->sta_scanning = 0;
2638
2639 if (ieee80211_hw_config(local))
2640 printk(KERN_DEBUG "%s: failed to restore operational"
2641 "channel after scan\n", dev->name);
2642
2643 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2644 ieee80211_if_config(dev))
2645 printk(KERN_DEBUG "%s: failed to restore operational"
2646 "BSSID after scan\n", dev->name);
2647
2648 memset(&wrqu, 0, sizeof(wrqu));
2649 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2650
2651 read_lock(&local->sub_if_lock);
2652 list_for_each_entry(sdata, &local->sub_if_list, list) {
2653
2654 /* No need to wake the master device. */
2655 if (sdata->dev == local->mdev)
2656 continue;
2657
2658 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2659 if (sdata->u.sta.associated)
2660 ieee80211_send_nullfunc(local, sdata, 0);
2661 ieee80211_sta_timer((unsigned long)sdata);
2662 }
2663
2664 netif_wake_queue(sdata->dev);
2665 }
2666 read_unlock(&local->sub_if_lock);
2667
2668 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2669 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2670 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2671 if (!ifsta->bssid_set ||
2672 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2673 !ieee80211_sta_active_ibss(dev)))
2674 ieee80211_sta_find_ibss(dev, ifsta);
2675 }
2676 }
2677 EXPORT_SYMBOL(ieee80211_scan_completed);
2678
2679 void ieee80211_sta_scan_work(struct work_struct *work)
2680 {
2681 struct ieee80211_local *local =
2682 container_of(work, struct ieee80211_local, scan_work.work);
2683 struct net_device *dev = local->scan_dev;
2684 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2685 struct ieee80211_hw_mode *mode;
2686 struct ieee80211_channel *chan;
2687 int skip;
2688 unsigned long next_delay = 0;
2689
2690 if (!local->sta_scanning)
2691 return;
2692
2693 switch (local->scan_state) {
2694 case SCAN_SET_CHANNEL:
2695 mode = local->scan_hw_mode;
2696 if (local->scan_hw_mode->list.next == &local->modes_list &&
2697 local->scan_channel_idx >= mode->num_channels) {
2698 ieee80211_scan_completed(local_to_hw(local));
2699 return;
2700 }
2701 skip = !(local->enabled_modes & (1 << mode->mode));
2702 chan = &mode->channels[local->scan_channel_idx];
2703 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2704 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2705 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2706 (local->hw_modes & local->enabled_modes &
2707 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2708 skip = 1;
2709
2710 if (!skip) {
2711 #if 0
2712 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2713 dev->name, chan->chan, chan->freq);
2714 #endif
2715
2716 local->scan_channel = chan;
2717 if (ieee80211_hw_config(local)) {
2718 printk(KERN_DEBUG "%s: failed to set channel "
2719 "%d (%d MHz) for scan\n", dev->name,
2720 chan->chan, chan->freq);
2721 skip = 1;
2722 }
2723 }
2724
2725 local->scan_channel_idx++;
2726 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2727 if (local->scan_hw_mode->list.next != &local->modes_list) {
2728 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2729 struct ieee80211_hw_mode,
2730 list);
2731 local->scan_channel_idx = 0;
2732 }
2733 }
2734
2735 if (skip)
2736 break;
2737
2738 next_delay = IEEE80211_PROBE_DELAY +
2739 usecs_to_jiffies(local->hw.channel_change_time);
2740 local->scan_state = SCAN_SEND_PROBE;
2741 break;
2742 case SCAN_SEND_PROBE:
2743 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2744 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2745 local->scan_ssid_len);
2746 next_delay = IEEE80211_CHANNEL_TIME;
2747 } else
2748 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2749 local->scan_state = SCAN_SET_CHANNEL;
2750 break;
2751 }
2752
2753 if (local->sta_scanning)
2754 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2755 next_delay);
2756 }
2757
2758
2759 static int ieee80211_sta_start_scan(struct net_device *dev,
2760 u8 *ssid, size_t ssid_len)
2761 {
2762 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2763 struct ieee80211_sub_if_data *sdata;
2764
2765 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2766 return -EINVAL;
2767
2768 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2769 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2770 * BSSID: MACAddress
2771 * SSID
2772 * ScanType: ACTIVE, PASSIVE
2773 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2774 * a Probe frame during active scanning
2775 * ChannelList
2776 * MinChannelTime (>= ProbeDelay), in TU
2777 * MaxChannelTime: (>= MinChannelTime), in TU
2778 */
2779
2780 /* MLME-SCAN.confirm
2781 * BSSDescriptionSet
2782 * ResultCode: SUCCESS, INVALID_PARAMETERS
2783 */
2784
2785 if (local->sta_scanning) {
2786 if (local->scan_dev == dev)
2787 return 0;
2788 return -EBUSY;
2789 }
2790
2791 if (local->ops->hw_scan) {
2792 int rc = local->ops->hw_scan(local_to_hw(local),
2793 ssid, ssid_len);
2794 if (!rc) {
2795 local->sta_scanning = 1;
2796 local->scan_dev = dev;
2797 }
2798 return rc;
2799 }
2800
2801 local->sta_scanning = 1;
2802
2803 read_lock(&local->sub_if_lock);
2804 list_for_each_entry(sdata, &local->sub_if_list, list) {
2805
2806 /* Don't stop the master interface, otherwise we can't transmit
2807 * probes! */
2808 if (sdata->dev == local->mdev)
2809 continue;
2810
2811 netif_stop_queue(sdata->dev);
2812 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2813 sdata->u.sta.associated)
2814 ieee80211_send_nullfunc(local, sdata, 1);
2815 }
2816 read_unlock(&local->sub_if_lock);
2817
2818 if (ssid) {
2819 local->scan_ssid_len = ssid_len;
2820 memcpy(local->scan_ssid, ssid, ssid_len);
2821 } else
2822 local->scan_ssid_len = 0;
2823 local->scan_state = SCAN_SET_CHANNEL;
2824 local->scan_hw_mode = list_entry(local->modes_list.next,
2825 struct ieee80211_hw_mode,
2826 list);
2827 local->scan_channel_idx = 0;
2828 local->scan_dev = dev;
2829
2830 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2831 ieee80211_if_config(dev))
2832 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2833 dev->name);
2834
2835 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2836 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2837 IEEE80211_CHANNEL_TIME);
2838
2839 return 0;
2840 }
2841
2842
2843 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2844 {
2845 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2846 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2847 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2848
2849 if (sdata->type != IEEE80211_IF_TYPE_STA)
2850 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2851
2852 if (local->sta_scanning) {
2853 if (local->scan_dev == dev)
2854 return 0;
2855 return -EBUSY;
2856 }
2857
2858 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2859 queue_work(local->hw.workqueue, &ifsta->work);
2860 return 0;
2861 }
2862
2863 static char *
2864 ieee80211_sta_scan_result(struct net_device *dev,
2865 struct ieee80211_sta_bss *bss,
2866 char *current_ev, char *end_buf)
2867 {
2868 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2869 struct iw_event iwe;
2870
2871 if (time_after(jiffies,
2872 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2873 return current_ev;
2874
2875 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2876 return current_ev;
2877
2878 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2879 !bss->wpa_ie && !bss->rsn_ie)
2880 return current_ev;
2881
2882 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2883 (local->scan_ssid_len != bss->ssid_len ||
2884 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2885 return current_ev;
2886
2887 memset(&iwe, 0, sizeof(iwe));
2888 iwe.cmd = SIOCGIWAP;
2889 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2890 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2891 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2892 IW_EV_ADDR_LEN);
2893
2894 memset(&iwe, 0, sizeof(iwe));
2895 iwe.cmd = SIOCGIWESSID;
2896 iwe.u.data.length = bss->ssid_len;
2897 iwe.u.data.flags = 1;
2898 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2899 bss->ssid);
2900
2901 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2902 memset(&iwe, 0, sizeof(iwe));
2903 iwe.cmd = SIOCGIWMODE;
2904 if (bss->capability & WLAN_CAPABILITY_ESS)
2905 iwe.u.mode = IW_MODE_MASTER;
2906 else
2907 iwe.u.mode = IW_MODE_ADHOC;
2908 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2909 IW_EV_UINT_LEN);
2910 }
2911
2912 memset(&iwe, 0, sizeof(iwe));
2913 iwe.cmd = SIOCGIWFREQ;
2914 iwe.u.freq.m = bss->channel;
2915 iwe.u.freq.e = 0;
2916 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2917 IW_EV_FREQ_LEN);
2918 iwe.u.freq.m = bss->freq * 100000;
2919 iwe.u.freq.e = 1;
2920 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2921 IW_EV_FREQ_LEN);
2922
2923 memset(&iwe, 0, sizeof(iwe));
2924 iwe.cmd = IWEVQUAL;
2925 iwe.u.qual.qual = bss->signal;
2926 iwe.u.qual.level = bss->rssi;
2927 iwe.u.qual.noise = bss->noise;
2928 iwe.u.qual.updated = local->wstats_flags;
2929 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2930 IW_EV_QUAL_LEN);
2931
2932 memset(&iwe, 0, sizeof(iwe));
2933 iwe.cmd = SIOCGIWENCODE;
2934 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2935 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2936 else
2937 iwe.u.data.flags = IW_ENCODE_DISABLED;
2938 iwe.u.data.length = 0;
2939 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2940
2941 if (bss && bss->wpa_ie) {
2942 memset(&iwe, 0, sizeof(iwe));
2943 iwe.cmd = IWEVGENIE;
2944 iwe.u.data.length = bss->wpa_ie_len;
2945 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2946 bss->wpa_ie);
2947 }
2948
2949 if (bss && bss->rsn_ie) {
2950 memset(&iwe, 0, sizeof(iwe));
2951 iwe.cmd = IWEVGENIE;
2952 iwe.u.data.length = bss->rsn_ie_len;
2953 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2954 bss->rsn_ie);
2955 }
2956
2957 if (bss && bss->supp_rates_len > 0) {
2958 /* display all supported rates in readable format */
2959 char *p = current_ev + IW_EV_LCP_LEN;
2960 int i;
2961
2962 memset(&iwe, 0, sizeof(iwe));
2963 iwe.cmd = SIOCGIWRATE;
2964 /* Those two flags are ignored... */
2965 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2966
2967 for (i = 0; i < bss->supp_rates_len; i++) {
2968 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2969 0x7f) * 500000);
2970 p = iwe_stream_add_value(current_ev, p,
2971 end_buf, &iwe, IW_EV_PARAM_LEN);
2972 }
2973 current_ev = p;
2974 }
2975
2976 if (bss) {
2977 char *buf;
2978 buf = kmalloc(30, GFP_ATOMIC);
2979 if (buf) {
2980 memset(&iwe, 0, sizeof(iwe));
2981 iwe.cmd = IWEVCUSTOM;
2982 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2983 iwe.u.data.length = strlen(buf);
2984 current_ev = iwe_stream_add_point(current_ev, end_buf,
2985 &iwe, buf);
2986 kfree(buf);
2987 }
2988 }
2989
2990 do {
2991 char *buf;
2992
2993 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2994 break;
2995
2996 buf = kmalloc(100, GFP_ATOMIC);
2997 if (!buf)
2998 break;
2999
3000 memset(&iwe, 0, sizeof(iwe));
3001 iwe.cmd = IWEVCUSTOM;
3002 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3003 iwe.u.data.length = strlen(buf);
3004 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3005 buf);
3006
3007 memset(&iwe, 0, sizeof(iwe));
3008 iwe.cmd = IWEVCUSTOM;
3009 sprintf(buf, "capab=0x%04x", bss->capability);
3010 iwe.u.data.length = strlen(buf);
3011 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3012 buf);
3013
3014 kfree(buf);
3015 break;
3016 } while (0);
3017
3018 return current_ev;
3019 }
3020
3021
3022 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3023 {
3024 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3025 char *current_ev = buf;
3026 char *end_buf = buf + len;
3027 struct ieee80211_sta_bss *bss;
3028
3029 spin_lock_bh(&local->sta_bss_lock);
3030 list_for_each_entry(bss, &local->sta_bss_list, list) {
3031 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3032 spin_unlock_bh(&local->sta_bss_lock);
3033 return -E2BIG;
3034 }
3035 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3036 end_buf);
3037 }
3038 spin_unlock_bh(&local->sta_bss_lock);
3039 return current_ev - buf;
3040 }
3041
3042
3043 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3044 {
3045 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3046 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3047 kfree(ifsta->extra_ie);
3048 if (len == 0) {
3049 ifsta->extra_ie = NULL;
3050 ifsta->extra_ie_len = 0;
3051 return 0;
3052 }
3053 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3054 if (!ifsta->extra_ie) {
3055 ifsta->extra_ie_len = 0;
3056 return -ENOMEM;
3057 }
3058 memcpy(ifsta->extra_ie, ie, len);
3059 ifsta->extra_ie_len = len;
3060 return 0;
3061 }
3062
3063
3064 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3065 struct sk_buff *skb, u8 *bssid,
3066 u8 *addr)
3067 {
3068 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3069 struct sta_info *sta;
3070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3071
3072 /* TODO: Could consider removing the least recently used entry and
3073 * allow new one to be added. */
3074 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3075 if (net_ratelimit()) {
3076 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3077 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3078 }
3079 return NULL;
3080 }
3081
3082 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3083 local->mdev->name, MAC_ARG(addr), dev->name);
3084
3085 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3086 if (!sta)
3087 return NULL;
3088
3089 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3090
3091 rate_control_rate_init(sta, local);
3092
3093 return sta; /* caller will call sta_info_put() */
3094 }
3095
3096
3097 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3098 {
3099 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3100 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3101
3102 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3103 dev->name, reason);
3104
3105 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3106 sdata->type != IEEE80211_IF_TYPE_IBSS)
3107 return -EINVAL;
3108
3109 ieee80211_send_deauth(dev, ifsta, reason);
3110 ieee80211_set_disassoc(dev, ifsta, 1);
3111 return 0;
3112 }
3113
3114
3115 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3116 {
3117 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3118 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3119
3120 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3121 dev->name, reason);
3122
3123 if (sdata->type != IEEE80211_IF_TYPE_STA)
3124 return -EINVAL;
3125
3126 if (!ifsta->associated)
3127 return -1;
3128
3129 ieee80211_send_disassoc(dev, ifsta, reason);
3130 ieee80211_set_disassoc(dev, ifsta, 0);
3131 return 0;
3132 }
kmemtrace - Kernel memory tracer