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[MAC80211]: implement ERP info change notifications
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
15 * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
16 * order BSS list by RSSI(?) ("quality of AP")
17 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
18 * SSID)
19 */
5b323edb 20#include <linux/delay.h>
f0706e82
JB		 21#include <linux/if_ether.h>
22#include <linux/skbuff.h>
23#include <linux/netdevice.h>
24#include <linux/if_arp.h>
25#include <linux/wireless.h>
26#include <linux/random.h>
27#include <linux/etherdevice.h>
f0706e82
JB		 28#include <net/iw_handler.h>
29#include <asm/types.h>
f0706e82
JB		 30
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
33#include "ieee80211_rate.h"
34#include "hostapd_ioctl.h"
35
36#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39#define IEEE80211_ASSOC_MAX_TRIES 3
40#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
41#define IEEE80211_PROBE_INTERVAL (60 * HZ)
42#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
43#define IEEE80211_SCAN_INTERVAL (2 * HZ)
44#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
45#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
46
47#define IEEE80211_PROBE_DELAY (HZ / 33)
48#define IEEE80211_CHANNEL_TIME (HZ / 33)
49#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
50#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
51#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
52#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
53
54#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
55
56
57#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
58
59#define ERP_INFO_USE_PROTECTION BIT(1)
60
61static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
62 u8 *ssid, size_t ssid_len);
63static struct ieee80211_sta_bss *
64ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
65static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69static int ieee80211_sta_wep_configured(struct net_device *dev);
70static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76/* Parsed Information Elements */
77struct ieee802_11_elems {
5558235c 78 /* pointers to IEs */
f0706e82 79 u8 *ssid;
f0706e82 80 u8 *supp_rates;
f0706e82 81 u8 *fh_params;
f0706e82 82 u8 *ds_params;
f0706e82 83 u8 *cf_params;
f0706e82 84 u8 *tim;
f0706e82 85 u8 *ibss_params;
f0706e82 86 u8 *challenge;
f0706e82 87 u8 *wpa;
f0706e82 88 u8 *rsn;
f0706e82 89 u8 *erp_info;
f0706e82 90 u8 *ext_supp_rates;
f0706e82 91 u8 *wmm_info;
f0706e82 92 u8 *wmm_param;
5558235c
JB		 93
94 /* length of them, respectively */
95 u8 ssid_len;
96 u8 supp_rates_len;
97 u8 fh_params_len;
98 u8 ds_params_len;
99 u8 cf_params_len;
100 u8 tim_len;
101 u8 ibss_params_len;
102 u8 challenge_len;
103 u8 wpa_len;
104 u8 rsn_len;
105 u8 erp_info_len;
106 u8 ext_supp_rates_len;
107 u8 wmm_info_len;
f0706e82
JB		 108 u8 wmm_param_len;
109};
110
111typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
112
113
114static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
115 struct ieee802_11_elems *elems)
116{
117 size_t left = len;
118 u8 *pos = start;
119 int unknown = 0;
120
121 memset(elems, 0, sizeof(*elems));
122
123 while (left >= 2) {
124 u8 id, elen;
125
126 id = *pos++;
127 elen = *pos++;
128 left -= 2;
129
130 if (elen > left) {
131#if 0
132 if (net_ratelimit())
133 printk(KERN_DEBUG "IEEE 802.11 element parse "
134 "failed (id=%d elen=%d left=%d)\n",
135 id, elen, left);
136#endif
137 return ParseFailed;
138 }
139
140 switch (id) {
141 case WLAN_EID_SSID:
142 elems->ssid = pos;
143 elems->ssid_len = elen;
144 break;
145 case WLAN_EID_SUPP_RATES:
146 elems->supp_rates = pos;
147 elems->supp_rates_len = elen;
148 break;
149 case WLAN_EID_FH_PARAMS:
150 elems->fh_params = pos;
151 elems->fh_params_len = elen;
152 break;
153 case WLAN_EID_DS_PARAMS:
154 elems->ds_params = pos;
155 elems->ds_params_len = elen;
156 break;
157 case WLAN_EID_CF_PARAMS:
158 elems->cf_params = pos;
159 elems->cf_params_len = elen;
160 break;
161 case WLAN_EID_TIM:
162 elems->tim = pos;
163 elems->tim_len = elen;
164 break;
165 case WLAN_EID_IBSS_PARAMS:
166 elems->ibss_params = pos;
167 elems->ibss_params_len = elen;
168 break;
169 case WLAN_EID_CHALLENGE:
170 elems->challenge = pos;
171 elems->challenge_len = elen;
172 break;
173 case WLAN_EID_WPA:
174 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
175 pos[2] == 0xf2) {
176 /* Microsoft OUI (00:50:F2) */
177 if (pos[3] == 1) {
178 /* OUI Type 1 - WPA IE */
179 elems->wpa = pos;
180 elems->wpa_len = elen;
181 } else if (elen >= 5 && pos[3] == 2) {
182 if (pos[4] == 0) {
183 elems->wmm_info = pos;
184 elems->wmm_info_len = elen;
185 } else if (pos[4] == 1) {
186 elems->wmm_param = pos;
187 elems->wmm_param_len = elen;
188 }
189 }
190 }
191 break;
192 case WLAN_EID_RSN:
193 elems->rsn = pos;
194 elems->rsn_len = elen;
195 break;
196 case WLAN_EID_ERP_INFO:
197 elems->erp_info = pos;
198 elems->erp_info_len = elen;
199 break;
200 case WLAN_EID_EXT_SUPP_RATES:
201 elems->ext_supp_rates = pos;
202 elems->ext_supp_rates_len = elen;
203 break;
204 default:
205#if 0
206 printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
207 "unknown element (id=%d elen=%d)\n",
208 id, elen);
209#endif
210 unknown++;
211 break;
212 }
213
214 left -= elen;
215 pos += elen;
216 }
217
218 /* Do not trigger error if left == 1 as Apple Airport base stations
219 * send AssocResps that are one spurious byte too long. */
220
221 return unknown ? ParseUnknown : ParseOK;
222}
223
224
225
226
227static int ecw2cw(int ecw)
228{
229 int cw = 1;
230 while (ecw > 0) {
231 cw <<= 1;
232 ecw--;
233 }
234 return cw - 1;
235}
236
237
238static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241{
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(&params, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313}
314
315
5628221c
DD		 316static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
317{
5628221c
DD		 318 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
319 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
320 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 321 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 322 u8 changes = 0;
5628221c 323
63fc33ce 324 if (use_protection != sdata->use_protection) {
5628221c
DD		 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 }
63fc33ce 332 sdata->use_protection = use_protection;
d9430a32 333 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 334 }
7e9ed188
DD		 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;
d9430a32 346 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 347 }
d9430a32
DD		 348
349 if (changes)
350 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 351}
352
353
f0706e82
JB		 354static 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_ATOMIC);
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
405static 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;
5628221c 417 struct ieee80211_sta_bss *bss;
f0706e82
JB		 418 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
419 if (sdata->type != IEEE80211_IF_TYPE_STA)
420 return;
5628221c
DD		 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
f0706e82
JB		 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);
d9430a32 436 ieee80211_reset_erp_info(dev);
f0706e82
JB		 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
444static 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
453static 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
475static 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
513static 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
535static 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_ATOMIC);
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
655static 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
684static 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
713static 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 ||
720 ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
721 return 0;
722
723 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
724 if (!bss)
725 return 0;
726
727 if (ieee80211_sta_wep_configured(dev) !=
728 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
729 res = 1;
730
731 ieee80211_rx_bss_put(dev, bss);
732
733 return res;
734}
735
736
737static void ieee80211_associate(struct net_device *dev,
738 struct ieee80211_if_sta *ifsta)
739{
740 ifsta->assoc_tries++;
741 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
742 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
743 " timed out\n",
744 dev->name, MAC_ARG(ifsta->bssid));
745 ifsta->state = IEEE80211_DISABLED;
746 return;
747 }
748
749 ifsta->state = IEEE80211_ASSOCIATE;
750 printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
751 dev->name, MAC_ARG(ifsta->bssid));
752 if (ieee80211_privacy_mismatch(dev, ifsta)) {
753 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
754 "mixed-cell disabled - abort association\n", dev->name);
755 ifsta->state = IEEE80211_DISABLED;
756 return;
757 }
758
759 ieee80211_send_assoc(dev, ifsta);
760
761 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
762}
763
764
765static void ieee80211_associated(struct net_device *dev,
766 struct ieee80211_if_sta *ifsta)
767{
768 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
769 struct sta_info *sta;
770 int disassoc;
771
772 /* TODO: start monitoring current AP signal quality and number of
773 * missed beacons. Scan other channels every now and then and search
774 * for better APs. */
775 /* TODO: remove expired BSSes */
776
777 ifsta->state = IEEE80211_ASSOCIATED;
778
779 sta = sta_info_get(local, ifsta->bssid);
780 if (!sta) {
781 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
782 dev->name, MAC_ARG(ifsta->bssid));
783 disassoc = 1;
784 } else {
785 disassoc = 0;
786 if (time_after(jiffies,
787 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
788 if (ifsta->probereq_poll) {
789 printk(KERN_DEBUG "%s: No ProbeResp from "
790 "current AP " MAC_FMT " - assume out of "
791 "range\n",
792 dev->name, MAC_ARG(ifsta->bssid));
793 disassoc = 1;
be8755e1 794 sta_info_free(sta);
f0706e82
JB		 795 ifsta->probereq_poll = 0;
796 } else {
797 ieee80211_send_probe_req(dev, ifsta->bssid,
798 local->scan_ssid,
799 local->scan_ssid_len);
800 ifsta->probereq_poll = 1;
801 }
802 } else {
803 ifsta->probereq_poll = 0;
804 if (time_after(jiffies, ifsta->last_probe +
805 IEEE80211_PROBE_INTERVAL)) {
806 ifsta->last_probe = jiffies;
807 ieee80211_send_probe_req(dev, ifsta->bssid,
808 ifsta->ssid,
809 ifsta->ssid_len);
810 }
811 }
812 sta_info_put(sta);
813 }
814 if (disassoc) {
815 union iwreq_data wrqu;
816 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
817 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
818 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
819 mod_timer(&ifsta->timer, jiffies +
820 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
821 } else {
822 mod_timer(&ifsta->timer, jiffies +
823 IEEE80211_MONITORING_INTERVAL);
824 }
825}
826
827
828static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
829 u8 *ssid, size_t ssid_len)
830{
831 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
832 struct ieee80211_hw_mode *mode;
833 struct sk_buff *skb;
834 struct ieee80211_mgmt *mgmt;
835 u8 *pos, *supp_rates, *esupp_rates = NULL;
836 int i;
837
838 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
839 if (!skb) {
840 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
841 "request\n", dev->name);
842 return;
843 }
844 skb_reserve(skb, local->hw.extra_tx_headroom);
845
846 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
847 memset(mgmt, 0, 24);
848 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
849 IEEE80211_STYPE_PROBE_REQ);
850 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
851 if (dst) {
852 memcpy(mgmt->da, dst, ETH_ALEN);
853 memcpy(mgmt->bssid, dst, ETH_ALEN);
854 } else {
855 memset(mgmt->da, 0xff, ETH_ALEN);
856 memset(mgmt->bssid, 0xff, ETH_ALEN);
857 }
858 pos = skb_put(skb, 2 + ssid_len);
859 *pos++ = WLAN_EID_SSID;
860 *pos++ = ssid_len;
861 memcpy(pos, ssid, ssid_len);
862
863 supp_rates = skb_put(skb, 2);
864 supp_rates[0] = WLAN_EID_SUPP_RATES;
865 supp_rates[1] = 0;
866 mode = local->oper_hw_mode;
867 for (i = 0; i < mode->num_rates; i++) {
868 struct ieee80211_rate *rate = &mode->rates[i];
869 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
870 continue;
871 if (esupp_rates) {
872 pos = skb_put(skb, 1);
873 esupp_rates[1]++;
874 } else if (supp_rates[1] == 8) {
875 esupp_rates = skb_put(skb, 3);
876 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
877 esupp_rates[1] = 1;
878 pos = &esupp_rates[2];
879 } else {
880 pos = skb_put(skb, 1);
881 supp_rates[1]++;
882 }
883 if (mode->mode == MODE_ATHEROS_TURBO)
884 *pos = rate->rate / 10;
885 else
886 *pos = rate->rate / 5;
887 }
888
889 ieee80211_sta_tx(dev, skb, 0);
890}
891
892
893static int ieee80211_sta_wep_configured(struct net_device *dev)
894{
895 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
896 if (!sdata || !sdata->default_key ||
897 sdata->default_key->alg != ALG_WEP)
898 return 0;
899 return 1;
900}
901
902
903static void ieee80211_auth_completed(struct net_device *dev,
904 struct ieee80211_if_sta *ifsta)
905{
906 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
907 ifsta->authenticated = 1;
908 ieee80211_associate(dev, ifsta);
909}
910
911
912static void ieee80211_auth_challenge(struct net_device *dev,
913 struct ieee80211_if_sta *ifsta,
914 struct ieee80211_mgmt *mgmt,
915 size_t len)
916{
917 u8 *pos;
918 struct ieee802_11_elems elems;
919
920 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
921 pos = mgmt->u.auth.variable;
922 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
923 == ParseFailed) {
924 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
925 dev->name);
926 return;
927 }
928 if (!elems.challenge) {
929 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
930 "frame\n", dev->name);
931 return;
932 }
933 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
934 elems.challenge_len + 2, 1);
935}
936
937
938static void ieee80211_rx_mgmt_auth(struct net_device *dev,
939 struct ieee80211_if_sta *ifsta,
940 struct ieee80211_mgmt *mgmt,
941 size_t len)
942{
943 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
944 u16 auth_alg, auth_transaction, status_code;
945
946 if (ifsta->state != IEEE80211_AUTHENTICATE &&
947 sdata->type != IEEE80211_IF_TYPE_IBSS) {
948 printk(KERN_DEBUG "%s: authentication frame received from "
949 MAC_FMT ", but not in authenticate state - ignored\n",
950 dev->name, MAC_ARG(mgmt->sa));
951 return;
952 }
953
954 if (len < 24 + 6) {
955 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
956 "received from " MAC_FMT " - ignored\n",
957 dev->name, len, MAC_ARG(mgmt->sa));
958 return;
959 }
960
961 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
962 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
963 printk(KERN_DEBUG "%s: authentication frame received from "
964 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
965 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
966 MAC_ARG(mgmt->bssid));
967 return;
968 }
969
970 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
971 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
972 printk(KERN_DEBUG "%s: authentication frame received from "
973 "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
974 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
975 MAC_ARG(mgmt->bssid));
976 return;
977 }
978
979 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
980 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
981 status_code = le16_to_cpu(mgmt->u.auth.status_code);
982
983 printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
984 "transaction=%d status=%d)\n",
985 dev->name, MAC_ARG(mgmt->sa), auth_alg,
986 auth_transaction, status_code);
987
988 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
989 /* IEEE 802.11 standard does not require authentication in IBSS
990 * networks and most implementations do not seem to use it.
991 * However, try to reply to authentication attempts if someone
992 * has actually implemented this.
993 * TODO: Could implement shared key authentication. */
994 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
995 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
996 "frame (alg=%d transaction=%d)\n",
997 dev->name, auth_alg, auth_transaction);
998 return;
999 }
1000 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1001 }
1002
1003 if (auth_alg != ifsta->auth_alg ||
1004 auth_transaction != ifsta->auth_transaction) {
1005 printk(KERN_DEBUG "%s: unexpected authentication frame "
1006 "(alg=%d transaction=%d)\n",
1007 dev->name, auth_alg, auth_transaction);
1008 return;
1009 }
1010
1011 if (status_code != WLAN_STATUS_SUCCESS) {
1012 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1013 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1014 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1015 u8 algs[3];
1016 const int num_algs = ARRAY_SIZE(algs);
1017 int i, pos;
1018 algs[0] = algs[1] = algs[2] = 0xff;
1019 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1020 algs[0] = WLAN_AUTH_OPEN;
1021 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1022 algs[1] = WLAN_AUTH_SHARED_KEY;
1023 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1024 algs[2] = WLAN_AUTH_LEAP;
1025 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1026 pos = 0;
1027 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1028 pos = 1;
1029 else
1030 pos = 2;
1031 for (i = 0; i < num_algs; i++) {
1032 pos++;
1033 if (pos >= num_algs)
1034 pos = 0;
1035 if (algs[pos] == ifsta->auth_alg ||
1036 algs[pos] == 0xff)
1037 continue;
1038 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1039 !ieee80211_sta_wep_configured(dev))
1040 continue;
1041 ifsta->auth_alg = algs[pos];
1042 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1043 "next try\n",
1044 dev->name, ifsta->auth_alg);
1045 break;
1046 }
1047 }
1048 return;
1049 }
1050
1051 switch (ifsta->auth_alg) {
1052 case WLAN_AUTH_OPEN:
1053 case WLAN_AUTH_LEAP:
1054 ieee80211_auth_completed(dev, ifsta);
1055 break;
1056 case WLAN_AUTH_SHARED_KEY:
1057 if (ifsta->auth_transaction == 4)
1058 ieee80211_auth_completed(dev, ifsta);
1059 else
1060 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1061 break;
1062 }
1063}
1064
1065
1066static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1067 struct ieee80211_if_sta *ifsta,
1068 struct ieee80211_mgmt *mgmt,
1069 size_t len)
1070{
1071 u16 reason_code;
1072
1073 if (len < 24 + 2) {
1074 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1075 "received from " MAC_FMT " - ignored\n",
1076 dev->name, len, MAC_ARG(mgmt->sa));
1077 return;
1078 }
1079
1080 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1081 printk(KERN_DEBUG "%s: deauthentication frame received from "
1082 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1083 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1084 MAC_ARG(mgmt->bssid));
1085 return;
1086 }
1087
1088 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1089
1090 printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1091 " (reason=%d)\n",
1092 dev->name, MAC_ARG(mgmt->sa), reason_code);
1093
1094 if (ifsta->authenticated) {
1095 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1096 }
1097
1098 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1099 ifsta->state == IEEE80211_ASSOCIATE ||
1100 ifsta->state == IEEE80211_ASSOCIATED) {
1101 ifsta->state = IEEE80211_AUTHENTICATE;
1102 mod_timer(&ifsta->timer, jiffies +
1103 IEEE80211_RETRY_AUTH_INTERVAL);
1104 }
1105
1106 ieee80211_set_disassoc(dev, ifsta, 1);
1107 ifsta->authenticated = 0;
1108}
1109
1110
1111static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1112 struct ieee80211_if_sta *ifsta,
1113 struct ieee80211_mgmt *mgmt,
1114 size_t len)
1115{
1116 u16 reason_code;
1117
1118 if (len < 24 + 2) {
1119 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1120 "received from " MAC_FMT " - ignored\n",
1121 dev->name, len, MAC_ARG(mgmt->sa));
1122 return;
1123 }
1124
1125 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1126 printk(KERN_DEBUG "%s: disassociation frame received from "
1127 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1128 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1129 MAC_ARG(mgmt->bssid));
1130 return;
1131 }
1132
1133 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1134
1135 printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1136 " (reason=%d)\n",
1137 dev->name, MAC_ARG(mgmt->sa), reason_code);
1138
1139 if (ifsta->associated)
1140 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1141
1142 if (ifsta->state == IEEE80211_ASSOCIATED) {
1143 ifsta->state = IEEE80211_ASSOCIATE;
1144 mod_timer(&ifsta->timer, jiffies +
1145 IEEE80211_RETRY_AUTH_INTERVAL);
1146 }
1147
1148 ieee80211_set_disassoc(dev, ifsta, 0);
1149}
1150
1151
1152static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1153 struct ieee80211_if_sta *ifsta,
1154 struct ieee80211_mgmt *mgmt,
1155 size_t len,
1156 int reassoc)
1157{
1158 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1159 struct ieee80211_hw_mode *mode;
1160 struct sta_info *sta;
1161 u32 rates;
1162 u16 capab_info, status_code, aid;
1163 struct ieee802_11_elems elems;
1164 u8 *pos;
1165 int i, j;
1166
1167 /* AssocResp and ReassocResp have identical structure, so process both
1168 * of them in this function. */
1169
1170 if (ifsta->state != IEEE80211_ASSOCIATE) {
1171 printk(KERN_DEBUG "%s: association frame received from "
1172 MAC_FMT ", but not in associate state - ignored\n",
1173 dev->name, MAC_ARG(mgmt->sa));
1174 return;
1175 }
1176
1177 if (len < 24 + 6) {
1178 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1179 "received from " MAC_FMT " - ignored\n",
1180 dev->name, len, MAC_ARG(mgmt->sa));
1181 return;
1182 }
1183
1184 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1185 printk(KERN_DEBUG "%s: association frame received from "
1186 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1187 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1188 MAC_ARG(mgmt->bssid));
1189 return;
1190 }
1191
1192 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1193 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1194 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1195 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1196 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1197 "set\n", dev->name, aid);
1198 aid &= ~(BIT(15) | BIT(14));
1199
1200 printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1201 "status=%d aid=%d)\n",
1202 dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1203 capab_info, status_code, aid);
1204
1205 if (status_code != WLAN_STATUS_SUCCESS) {
1206 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1207 dev->name, status_code);
8a69aa93
DD		 1208 /* if this was a reassociation, ensure we try a "full"
1209 * association next time. This works around some broken APs
1210 * which do not correctly reject reassociation requests. */
1211 ifsta->prev_bssid_set = 0;
f0706e82
JB		 1212 return;
1213 }
1214
1215 pos = mgmt->u.assoc_resp.variable;
1216 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1217 == ParseFailed) {
1218 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1219 dev->name);
1220 return;
1221 }
1222
1223 if (!elems.supp_rates) {
1224 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1225 dev->name);
1226 return;
1227 }
1228
5628221c
DD		 1229 /* it probably doesn't, but if the frame includes an ERP value then
1230 * update our stored copy */
1231 if (elems.erp_info && elems.erp_info_len >= 1) {
1232 struct ieee80211_sta_bss *bss
1233 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1234 if (bss) {
1235 bss->erp_value = elems.erp_info[0];
1236 bss->has_erp_value = 1;
1237 ieee80211_rx_bss_put(dev, bss);
1238 }
1239 }
1240
f0706e82
JB		 1241 printk(KERN_DEBUG "%s: associated\n", dev->name);
1242 ifsta->aid = aid;
1243 ifsta->ap_capab = capab_info;
1244
1245 kfree(ifsta->assocresp_ies);
1246 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1247 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1248 if (ifsta->assocresp_ies)
1249 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1250
1251 ieee80211_set_associated(dev, ifsta, 1);
1252
1253 /* Add STA entry for the AP */
1254 sta = sta_info_get(local, ifsta->bssid);
1255 if (!sta) {
1256 struct ieee80211_sta_bss *bss;
1257 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1258 if (!sta) {
1259 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1260 " AP\n", dev->name);
1261 return;
1262 }
1263 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1264 if (bss) {
1265 sta->last_rssi = bss->rssi;
1266 sta->last_signal = bss->signal;
1267 sta->last_noise = bss->noise;
1268 ieee80211_rx_bss_put(dev, bss);
1269 }
1270 }
1271
1272 sta->dev = dev;
1273 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1274 sta->assoc_ap = 1;
1275
1276 rates = 0;
1277 mode = local->oper_hw_mode;
1278 for (i = 0; i < elems.supp_rates_len; i++) {
1279 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1280 if (mode->mode == MODE_ATHEROS_TURBO)
1281 rate *= 2;
1282 for (j = 0; j < mode->num_rates; j++)
1283 if (mode->rates[j].rate == rate)
1284 rates |= BIT(j);
1285 }
1286 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1287 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1288 if (mode->mode == MODE_ATHEROS_TURBO)
1289 rate *= 2;
1290 for (j = 0; j < mode->num_rates; j++)
1291 if (mode->rates[j].rate == rate)
1292 rates |= BIT(j);
1293 }
1294 sta->supp_rates = rates;
1295
1296 rate_control_rate_init(sta, local);
1297
1298 if (elems.wmm_param && ifsta->wmm_enabled) {
1299 sta->flags |= WLAN_STA_WME;
1300 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1301 elems.wmm_param_len);
1302 }
1303
1304
1305 sta_info_put(sta);
1306
1307 ieee80211_associated(dev, ifsta);
1308}
1309
1310
1311/* Caller must hold local->sta_bss_lock */
1312static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1313 struct ieee80211_sta_bss *bss)
1314{
1315 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1316 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1317 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1318}
1319
1320
1321/* Caller must hold local->sta_bss_lock */
1322static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1323 struct ieee80211_sta_bss *bss)
1324{
1325 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1326 struct ieee80211_sta_bss *b, *prev = NULL;
1327 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1328 while (b) {
1329 if (b == bss) {
1330 if (!prev)
1331 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1332 bss->hnext;
1333 else
1334 prev->hnext = bss->hnext;
1335 break;
1336 }
1337 prev = b;
1338 b = b->hnext;
1339 }
1340}
1341
1342
1343static struct ieee80211_sta_bss *
1344ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1345{
1346 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1347 struct ieee80211_sta_bss *bss;
1348
dd00cc48 1349 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1350 if (!bss)
1351 return NULL;
f0706e82
JB		 1352 atomic_inc(&bss->users);
1353 atomic_inc(&bss->users);
1354 memcpy(bss->bssid, bssid, ETH_ALEN);
1355
1356 spin_lock_bh(&local->sta_bss_lock);
1357 /* TODO: order by RSSI? */
1358 list_add_tail(&bss->list, &local->sta_bss_list);
1359 __ieee80211_rx_bss_hash_add(dev, bss);
1360 spin_unlock_bh(&local->sta_bss_lock);
1361 return bss;
1362}
1363
1364
1365static struct ieee80211_sta_bss *
1366ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1367{
1368 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1369 struct ieee80211_sta_bss *bss;
1370
1371 spin_lock_bh(&local->sta_bss_lock);
1372 bss = local->sta_bss_hash[STA_HASH(bssid)];
1373 while (bss) {
1374 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1375 atomic_inc(&bss->users);
1376 break;
1377 }
1378 bss = bss->hnext;
1379 }
1380 spin_unlock_bh(&local->sta_bss_lock);
1381 return bss;
1382}
1383
1384
1385static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1386{
1387 kfree(bss->wpa_ie);
1388 kfree(bss->rsn_ie);
1389 kfree(bss->wmm_ie);
1390 kfree(bss);
1391}
1392
1393
1394static void ieee80211_rx_bss_put(struct net_device *dev,
1395 struct ieee80211_sta_bss *bss)
1396{
1397 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1398 if (!atomic_dec_and_test(&bss->users))
1399 return;
1400
1401 spin_lock_bh(&local->sta_bss_lock);
1402 __ieee80211_rx_bss_hash_del(dev, bss);
1403 list_del(&bss->list);
1404 spin_unlock_bh(&local->sta_bss_lock);
1405 ieee80211_rx_bss_free(bss);
1406}
1407
1408
1409void ieee80211_rx_bss_list_init(struct net_device *dev)
1410{
1411 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1412 spin_lock_init(&local->sta_bss_lock);
1413 INIT_LIST_HEAD(&local->sta_bss_list);
1414}
1415
1416
1417void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1418{
1419 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1420 struct ieee80211_sta_bss *bss, *tmp;
1421
1422 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1423 ieee80211_rx_bss_put(dev, bss);
1424}
1425
1426
1427static void ieee80211_rx_bss_info(struct net_device *dev,
1428 struct ieee80211_mgmt *mgmt,
1429 size_t len,
1430 struct ieee80211_rx_status *rx_status,
1431 int beacon)
1432{
1433 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1434 struct ieee802_11_elems elems;
1435 size_t baselen;
1436 int channel, invalid = 0, clen;
1437 struct ieee80211_sta_bss *bss;
1438 struct sta_info *sta;
1439 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1440 u64 timestamp;
1441
1442 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1443 return; /* ignore ProbeResp to foreign address */
1444
1445#if 0
1446 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1447 dev->name, beacon ? "Beacon" : "Probe Response",
1448 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1449#endif
1450
1451 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1452 if (baselen > len)
1453 return;
1454
1455 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1456
1457 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1458 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1459#ifdef CONFIG_MAC80211_IBSS_DEBUG
1460 static unsigned long last_tsf_debug = 0;
1461 u64 tsf;
1462 if (local->ops->get_tsf)
1463 tsf = local->ops->get_tsf(local_to_hw(local));
1464 else
1465 tsf = -1LLU;
1466 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1467 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1468 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1469 "@%lu\n",
1470 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1471 (unsigned long long)tsf,
1472 (unsigned long long)timestamp,
1473 (unsigned long long)(tsf - timestamp),
1474 jiffies);
1475 last_tsf_debug = jiffies;
1476 }
1477#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1478 }
1479
1480 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1481 &elems) == ParseFailed)
1482 invalid = 1;
1483
1484 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1485 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1486 (sta = sta_info_get(local, mgmt->sa))) {
1487 struct ieee80211_hw_mode *mode;
1488 struct ieee80211_rate *rates;
1489 size_t num_rates;
1490 u32 supp_rates, prev_rates;
1491 int i, j;
1492
1493 mode = local->sta_scanning ?
1494 local->scan_hw_mode : local->oper_hw_mode;
1495 rates = mode->rates;
1496 num_rates = mode->num_rates;
1497
1498 supp_rates = 0;
1499 for (i = 0; i < elems.supp_rates_len +
1500 elems.ext_supp_rates_len; i++) {
1501 u8 rate = 0;
1502 int own_rate;
1503 if (i < elems.supp_rates_len)
1504 rate = elems.supp_rates[i];
1505 else if (elems.ext_supp_rates)
1506 rate = elems.ext_supp_rates
1507 [i - elems.supp_rates_len];
1508 own_rate = 5 * (rate & 0x7f);
1509 if (mode->mode == MODE_ATHEROS_TURBO)
1510 own_rate *= 2;
1511 for (j = 0; j < num_rates; j++)
1512 if (rates[j].rate == own_rate)
1513 supp_rates |= BIT(j);
1514 }
1515
1516 prev_rates = sta->supp_rates;
1517 sta->supp_rates &= supp_rates;
1518 if (sta->supp_rates == 0) {
1519 /* No matching rates - this should not really happen.
1520 * Make sure that at least one rate is marked
1521 * supported to avoid issues with TX rate ctrl. */
1522 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1523 }
1524 if (sta->supp_rates != prev_rates) {
1525 printk(KERN_DEBUG "%s: updated supp_rates set for "
1526 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1527 "0x%x)\n",
1528 dev->name, MAC_ARG(sta->addr), prev_rates,
1529 supp_rates, sta->supp_rates);
1530 }
1531 sta_info_put(sta);
1532 }
1533
1534 if (!elems.ssid)
1535 return;
1536
1537 if (elems.ds_params && elems.ds_params_len == 1)
1538 channel = elems.ds_params[0];
1539 else
1540 channel = rx_status->channel;
1541
1542 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1543 if (!bss) {
1544 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1545 if (!bss)
1546 return;
1547 } else {
1548#if 0
1549 /* TODO: order by RSSI? */
1550 spin_lock_bh(&local->sta_bss_lock);
1551 list_move_tail(&bss->list, &local->sta_bss_list);
1552 spin_unlock_bh(&local->sta_bss_lock);
1553#endif
1554 }
1555
1556 if (bss->probe_resp && beacon) {
1557 /* Do not allow beacon to override data from Probe Response. */
1558 ieee80211_rx_bss_put(dev, bss);
1559 return;
1560 }
1561
5628221c
DD		 1562 /* save the ERP value so that it is available at association time */
1563 if (elems.erp_info && elems.erp_info_len >= 1) {
1564 bss->erp_value = elems.erp_info[0];
1565 bss->has_erp_value = 1;
1566 }
1567
f0706e82
JB		 1568 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1569 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1570 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1571 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1572 bss->ssid_len = elems.ssid_len;
1573 }
1574
1575 bss->supp_rates_len = 0;
1576 if (elems.supp_rates) {
1577 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1578 if (clen > elems.supp_rates_len)
1579 clen = elems.supp_rates_len;
1580 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1581 clen);
1582 bss->supp_rates_len += clen;
1583 }
1584 if (elems.ext_supp_rates) {
1585 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1586 if (clen > elems.ext_supp_rates_len)
1587 clen = elems.ext_supp_rates_len;
1588 memcpy(&bss->supp_rates[bss->supp_rates_len],
1589 elems.ext_supp_rates, clen);
1590 bss->supp_rates_len += clen;
1591 }
1592
1593 if (elems.wpa &&
1594 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1595 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1596 kfree(bss->wpa_ie);
1597 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1598 if (bss->wpa_ie) {
1599 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1600 bss->wpa_ie_len = elems.wpa_len + 2;
1601 } else
1602 bss->wpa_ie_len = 0;
1603 } else if (!elems.wpa && bss->wpa_ie) {
1604 kfree(bss->wpa_ie);
1605 bss->wpa_ie = NULL;
1606 bss->wpa_ie_len = 0;
1607 }
1608
1609 if (elems.rsn &&
1610 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1611 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1612 kfree(bss->rsn_ie);
1613 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1614 if (bss->rsn_ie) {
1615 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1616 bss->rsn_ie_len = elems.rsn_len + 2;
1617 } else
1618 bss->rsn_ie_len = 0;
1619 } else if (!elems.rsn && bss->rsn_ie) {
1620 kfree(bss->rsn_ie);
1621 bss->rsn_ie = NULL;
1622 bss->rsn_ie_len = 0;
1623 }
1624
1625 if (elems.wmm_param &&
1626 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1627 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1628 kfree(bss->wmm_ie);
1629 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1630 if (bss->wmm_ie) {
1631 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1632 elems.wmm_param_len + 2);
1633 bss->wmm_ie_len = elems.wmm_param_len + 2;
1634 } else
1635 bss->wmm_ie_len = 0;
1636 } else if (!elems.wmm_param && bss->wmm_ie) {
1637 kfree(bss->wmm_ie);
1638 bss->wmm_ie = NULL;
1639 bss->wmm_ie_len = 0;
1640 }
1641
1642
1643 bss->hw_mode = rx_status->phymode;
1644 bss->channel = channel;
1645 bss->freq = rx_status->freq;
1646 if (channel != rx_status->channel &&
1647 (bss->hw_mode == MODE_IEEE80211G ||
1648 bss->hw_mode == MODE_IEEE80211B) &&
1649 channel >= 1 && channel <= 14) {
1650 static const int freq_list[] = {
1651 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1652 2447, 2452, 2457, 2462, 2467, 2472, 2484
1653 };
1654 /* IEEE 802.11g/b mode can receive packets from neighboring
1655 * channels, so map the channel into frequency. */
1656 bss->freq = freq_list[channel - 1];
1657 }
1658 bss->timestamp = timestamp;
1659 bss->last_update = jiffies;
1660 bss->rssi = rx_status->ssi;
1661 bss->signal = rx_status->signal;
1662 bss->noise = rx_status->noise;
1663 if (!beacon)
1664 bss->probe_resp++;
1665 ieee80211_rx_bss_put(dev, bss);
1666}
1667
1668
1669static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1670 struct ieee80211_mgmt *mgmt,
1671 size_t len,
1672 struct ieee80211_rx_status *rx_status)
1673{
1674 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1675}
1676
1677
1678static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1679 struct ieee80211_mgmt *mgmt,
1680 size_t len,
1681 struct ieee80211_rx_status *rx_status)
1682{
f0706e82
JB		 1683 struct ieee80211_sub_if_data *sdata;
1684 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1685 size_t baselen;
1686 struct ieee802_11_elems elems;
1687
1688 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1689
1690 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1691 if (sdata->type != IEEE80211_IF_TYPE_STA)
1692 return;
1693 ifsta = &sdata->u.sta;
1694
1695 if (!ifsta->associated ||
1696 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1697 return;
1698
1699 /* Process beacon from the current BSS */
1700 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1701 if (baselen > len)
1702 return;
1703
1704 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1705 &elems) == ParseFailed)
1706 return;
1707
5628221c
DD		 1708 if (elems.erp_info && elems.erp_info_len >= 1)
1709 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82
JB		 1710
1711 if (elems.wmm_param && ifsta->wmm_enabled) {
1712 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1713 elems.wmm_param_len);
1714 }
1715}
1716
1717
1718static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1719 struct ieee80211_if_sta *ifsta,
1720 struct ieee80211_mgmt *mgmt,
1721 size_t len,
1722 struct ieee80211_rx_status *rx_status)
1723{
1724 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1725 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1726 int tx_last_beacon;
1727 struct sk_buff *skb;
1728 struct ieee80211_mgmt *resp;
1729 u8 *pos, *end;
1730
1731 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1732 ifsta->state != IEEE80211_IBSS_JOINED ||
1733 len < 24 + 2 || !ifsta->probe_resp)
1734 return;
1735
1736 if (local->ops->tx_last_beacon)
1737 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1738 else
1739 tx_last_beacon = 1;
1740
1741#ifdef CONFIG_MAC80211_IBSS_DEBUG
1742 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1743 MAC_FMT " (tx_last_beacon=%d)\n",
1744 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1745 MAC_ARG(mgmt->bssid), tx_last_beacon);
1746#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1747
1748 if (!tx_last_beacon)
1749 return;
1750
1751 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1752 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1753 return;
1754
1755 end = ((u8 *) mgmt) + len;
1756 pos = mgmt->u.probe_req.variable;
1757 if (pos[0] != WLAN_EID_SSID ||
1758 pos + 2 + pos[1] > end) {
1759 if (net_ratelimit()) {
1760 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1761 "from " MAC_FMT "\n",
1762 dev->name, MAC_ARG(mgmt->sa));
1763 }
1764 return;
1765 }
1766 if (pos[1] != 0 &&
1767 (pos[1] != ifsta->ssid_len ||
1768 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1769 /* Ignore ProbeReq for foreign SSID */
1770 return;
1771 }
1772
1773 /* Reply with ProbeResp */
1774 skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1775 if (!skb)
1776 return;
1777
1778 resp = (struct ieee80211_mgmt *) skb->data;
1779 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1780#ifdef CONFIG_MAC80211_IBSS_DEBUG
1781 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1782 dev->name, MAC_ARG(resp->da));
1783#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1784 ieee80211_sta_tx(dev, skb, 0);
1785}
1786
1787
1788void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1789 struct ieee80211_rx_status *rx_status)
1790{
1791 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1792 struct ieee80211_sub_if_data *sdata;
1793 struct ieee80211_if_sta *ifsta;
1794 struct ieee80211_mgmt *mgmt;
1795 u16 fc;
1796
1797 if (skb->len < 24)
1798 goto fail;
1799
1800 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1801 ifsta = &sdata->u.sta;
1802
1803 mgmt = (struct ieee80211_mgmt *) skb->data;
1804 fc = le16_to_cpu(mgmt->frame_control);
1805
1806 switch (fc & IEEE80211_FCTL_STYPE) {
1807 case IEEE80211_STYPE_PROBE_REQ:
1808 case IEEE80211_STYPE_PROBE_RESP:
1809 case IEEE80211_STYPE_BEACON:
1810 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1811 case IEEE80211_STYPE_AUTH:
1812 case IEEE80211_STYPE_ASSOC_RESP:
1813 case IEEE80211_STYPE_REASSOC_RESP:
1814 case IEEE80211_STYPE_DEAUTH:
1815 case IEEE80211_STYPE_DISASSOC:
1816 skb_queue_tail(&ifsta->skb_queue, skb);
1817 queue_work(local->hw.workqueue, &ifsta->work);
1818 return;
1819 default:
1820 printk(KERN_DEBUG "%s: received unknown management frame - "
1821 "stype=%d\n", dev->name,
1822 (fc & IEEE80211_FCTL_STYPE) >> 4);
1823 break;
1824 }
1825
1826 fail:
1827 kfree_skb(skb);
1828}
1829
1830
1831static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1832 struct sk_buff *skb)
1833{
1834 struct ieee80211_rx_status *rx_status;
1835 struct ieee80211_sub_if_data *sdata;
1836 struct ieee80211_if_sta *ifsta;
1837 struct ieee80211_mgmt *mgmt;
1838 u16 fc;
1839
1840 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1841 ifsta = &sdata->u.sta;
1842
1843 rx_status = (struct ieee80211_rx_status *) skb->cb;
1844 mgmt = (struct ieee80211_mgmt *) skb->data;
1845 fc = le16_to_cpu(mgmt->frame_control);
1846
1847 switch (fc & IEEE80211_FCTL_STYPE) {
1848 case IEEE80211_STYPE_PROBE_REQ:
1849 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1850 rx_status);
1851 break;
1852 case IEEE80211_STYPE_PROBE_RESP:
1853 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1854 break;
1855 case IEEE80211_STYPE_BEACON:
1856 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1857 break;
1858 case IEEE80211_STYPE_AUTH:
1859 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1860 break;
1861 case IEEE80211_STYPE_ASSOC_RESP:
1862 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1863 break;
1864 case IEEE80211_STYPE_REASSOC_RESP:
1865 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1866 break;
1867 case IEEE80211_STYPE_DEAUTH:
1868 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1869 break;
1870 case IEEE80211_STYPE_DISASSOC:
1871 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1872 break;
1873 }
1874
1875 kfree_skb(skb);
1876}
1877
1878
1879void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1880 struct ieee80211_rx_status *rx_status)
1881{
1882 struct ieee80211_mgmt *mgmt;
1883 u16 fc;
1884
1885 if (skb->len < 24) {
1886 dev_kfree_skb(skb);
1887 return;
1888 }
1889
1890 mgmt = (struct ieee80211_mgmt *) skb->data;
1891 fc = le16_to_cpu(mgmt->frame_control);
1892
1893 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1894 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1895 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1896 skb->len, rx_status);
1897 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1898 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1899 rx_status);
1900 }
1901 }
1902
1903 dev_kfree_skb(skb);
1904}
1905
1906
1907static int ieee80211_sta_active_ibss(struct net_device *dev)
1908{
1909 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1910 int active = 0;
1911 struct sta_info *sta;
1912
be8755e1 1913 read_lock_bh(&local->sta_lock);
f0706e82
JB		 1914 list_for_each_entry(sta, &local->sta_list, list) {
1915 if (sta->dev == dev &&
1916 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1917 jiffies)) {
1918 active++;
1919 break;
1920 }
1921 }
be8755e1 1922 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 1923
1924 return active;
1925}
1926
1927
1928static void ieee80211_sta_expire(struct net_device *dev)
1929{
1930 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1931 struct sta_info *sta, *tmp;
be8755e1 1932 LIST_HEAD(tmp_list);
f0706e82 1933
be8755e1 1934 write_lock_bh(&local->sta_lock);
f0706e82
JB		 1935 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1936 if (time_after(jiffies, sta->last_rx +
1937 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1938 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1939 "\n", dev->name, MAC_ARG(sta->addr));
be8755e1
MW		 1940 __sta_info_get(sta);
1941 sta_info_remove(sta);
1942 list_add(&sta->list, &tmp_list);
f0706e82 1943 }
be8755e1
MW		 1944 write_unlock_bh(&local->sta_lock);
1945
1946 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1947 sta_info_free(sta);
1948 sta_info_put(sta);
1949 }
f0706e82
JB		 1950}
1951
1952
1953static void ieee80211_sta_merge_ibss(struct net_device *dev,
1954 struct ieee80211_if_sta *ifsta)
1955{
1956 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1957
1958 ieee80211_sta_expire(dev);
1959 if (ieee80211_sta_active_ibss(dev))
1960 return;
1961
1962 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1963 "IBSS networks with same SSID (merge)\n", dev->name);
1964 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1965}
1966
1967
1968void ieee80211_sta_timer(unsigned long data)
1969{
1970 struct ieee80211_sub_if_data *sdata =
1971 (struct ieee80211_sub_if_data *) data;
1972 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1973 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1974
1975 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1976 queue_work(local->hw.workqueue, &ifsta->work);
1977}
1978
1979
1980void ieee80211_sta_work(struct work_struct *work)
1981{
1982 struct ieee80211_sub_if_data *sdata =
1983 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1984 struct net_device *dev = sdata->dev;
1985 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1986 struct ieee80211_if_sta *ifsta;
1987 struct sk_buff *skb;
1988
1989 if (!netif_running(dev))
1990 return;
1991
1992 if (local->sta_scanning)
1993 return;
1994
1995 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1996 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1997 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1998 "(type=%d)\n", dev->name, sdata->type);
1999 return;
2000 }
2001 ifsta = &sdata->u.sta;
2002
2003 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2004 ieee80211_sta_rx_queued_mgmt(dev, skb);
2005
2006 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2007 ifsta->state != IEEE80211_ASSOCIATE &&
2008 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2009 ieee80211_sta_start_scan(dev, NULL, 0);
2010 return;
2011 }
2012
2013 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2014 if (ieee80211_sta_config_auth(dev, ifsta))
2015 return;
2016 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2017 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2018 return;
2019
2020 switch (ifsta->state) {
2021 case IEEE80211_DISABLED:
2022 break;
2023 case IEEE80211_AUTHENTICATE:
2024 ieee80211_authenticate(dev, ifsta);
2025 break;
2026 case IEEE80211_ASSOCIATE:
2027 ieee80211_associate(dev, ifsta);
2028 break;
2029 case IEEE80211_ASSOCIATED:
2030 ieee80211_associated(dev, ifsta);
2031 break;
2032 case IEEE80211_IBSS_SEARCH:
2033 ieee80211_sta_find_ibss(dev, ifsta);
2034 break;
2035 case IEEE80211_IBSS_JOINED:
2036 ieee80211_sta_merge_ibss(dev, ifsta);
2037 break;
2038 default:
2039 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2040 ifsta->state);
2041 break;
2042 }
2043
2044 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2045 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2046 "mixed-cell disabled - disassociate\n", dev->name);
2047
2048 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2049 ieee80211_set_disassoc(dev, ifsta, 0);
2050 }
2051}
2052
2053
2054static void ieee80211_sta_reset_auth(struct net_device *dev,
2055 struct ieee80211_if_sta *ifsta)
2056{
2057 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2058
2059 if (local->ops->reset_tsf) {
2060 /* Reset own TSF to allow time synchronization work. */
2061 local->ops->reset_tsf(local_to_hw(local));
2062 }
2063
2064 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2065
2066
2067 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2068 ifsta->auth_alg = WLAN_AUTH_OPEN;
2069 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2070 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2071 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2072 ifsta->auth_alg = WLAN_AUTH_LEAP;
2073 else
2074 ifsta->auth_alg = WLAN_AUTH_OPEN;
2075 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2076 ifsta->auth_alg);
2077 ifsta->auth_transaction = -1;
2078 ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2079 netif_carrier_off(dev);
2080}
2081
2082
2083void ieee80211_sta_req_auth(struct net_device *dev,
2084 struct ieee80211_if_sta *ifsta)
2085{
2086 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2088
2089 if (sdata->type != IEEE80211_IF_TYPE_STA)
2090 return;
2091
2092 if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2093 (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2094 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2095 queue_work(local->hw.workqueue, &ifsta->work);
2096 }
2097}
2098
2099static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2100 const char *ssid, int ssid_len)
2101{
2102 int tmp, hidden_ssid;
2103
2104 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2105 return 1;
2106
2107 if (ifsta->auto_bssid_sel)
2108 return 0;
2109
2110 hidden_ssid = 1;
2111 tmp = ssid_len;
2112 while (tmp--) {
2113 if (ssid[tmp] != '\0') {
2114 hidden_ssid = 0;
2115 break;
2116 }
2117 }
2118
2119 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2120 return 1;
2121
2122 if (ssid_len == 1 && ssid[0] == ' ')
2123 return 1;
2124
2125 return 0;
2126}
2127
2128static int ieee80211_sta_config_auth(struct net_device *dev,
2129 struct ieee80211_if_sta *ifsta)
2130{
2131 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2132 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2133 struct ieee80211_sta_bss *bss, *selected = NULL;
2134 int top_rssi = 0, freq;
2135
f0706e82
JB		 2136 if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2137 !ifsta->auto_ssid_sel) {
2138 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2139 ieee80211_sta_reset_auth(dev, ifsta);
2140 return 0;
2141 }
2142
2143 spin_lock_bh(&local->sta_bss_lock);
2144 freq = local->oper_channel->freq;
2145 list_for_each_entry(bss, &local->sta_bss_list, list) {
2146 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2147 continue;
2148
2149 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2150 !!sdata->default_key)
2151 continue;
2152
2153 if (!ifsta->auto_channel_sel && bss->freq != freq)
2154 continue;
2155
2156 if (!ifsta->auto_bssid_sel &&
2157 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2158 continue;
2159
2160 if (!ifsta->auto_ssid_sel &&
2161 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2162 continue;
2163
2164 if (!selected || top_rssi < bss->rssi) {
2165 selected = bss;
2166 top_rssi = bss->rssi;
2167 }
2168 }
2169 if (selected)
2170 atomic_inc(&selected->users);
2171 spin_unlock_bh(&local->sta_bss_lock);
2172
2173 if (selected) {
2174 ieee80211_set_channel(local, -1, selected->freq);
2175 if (!ifsta->ssid_set)
2176 ieee80211_sta_set_ssid(dev, selected->ssid,
2177 selected->ssid_len);
2178 ieee80211_sta_set_bssid(dev, selected->bssid);
2179 ieee80211_rx_bss_put(dev, selected);
2180 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2181 ieee80211_sta_reset_auth(dev, ifsta);
2182 return 0;
2183 } else {
2184 if (ifsta->state != IEEE80211_AUTHENTICATE) {
b9bf1e60
JL		 2185 if (ifsta->auto_ssid_sel)
2186 ieee80211_sta_start_scan(dev, NULL, 0);
2187 else
2188 ieee80211_sta_start_scan(dev, ifsta->ssid,
2189 ifsta->ssid_len);
f0706e82
JB		 2190 ifsta->state = IEEE80211_AUTHENTICATE;
2191 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2192 } else
2193 ifsta->state = IEEE80211_DISABLED;
2194 }
f0706e82
JB		 2195 return -1;
2196}
2197
2198static int ieee80211_sta_join_ibss(struct net_device *dev,
2199 struct ieee80211_if_sta *ifsta,
2200 struct ieee80211_sta_bss *bss)
2201{
2202 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2203 int res, rates, i, j;
2204 struct sk_buff *skb;
2205 struct ieee80211_mgmt *mgmt;
2206 struct ieee80211_tx_control control;
2207 struct ieee80211_rate *rate;
2208 struct ieee80211_hw_mode *mode;
2209 struct rate_control_extra extra;
2210 u8 *pos;
2211 struct ieee80211_sub_if_data *sdata;
2212
2213 /* Remove possible STA entries from other IBSS networks. */
2214 sta_info_flush(local, NULL);
2215
2216 if (local->ops->reset_tsf) {
2217 /* Reset own TSF to allow time synchronization work. */
2218 local->ops->reset_tsf(local_to_hw(local));
2219 }
2220 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2221 res = ieee80211_if_config(dev);
2222 if (res)
2223 return res;
2224
2225 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2226
2227 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2228 sdata->drop_unencrypted = bss->capability &
2229 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2230
2231 res = ieee80211_set_channel(local, -1, bss->freq);
2232
2233 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2234 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2235 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2236 local->hw.conf.freq);
2237 return -1;
2238 }
2239
2240 /* Set beacon template based on scan results */
2241 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2242 do {
2243 if (!skb)
2244 break;
2245
2246 skb_reserve(skb, local->hw.extra_tx_headroom);
2247
2248 mgmt = (struct ieee80211_mgmt *)
2249 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2250 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2251 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2252 IEEE80211_STYPE_BEACON);
2253 memset(mgmt->da, 0xff, ETH_ALEN);
2254 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2255 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2256 mgmt->u.beacon.beacon_int =
2257 cpu_to_le16(local->hw.conf.beacon_int);
2258 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2259
2260 pos = skb_put(skb, 2 + ifsta->ssid_len);
2261 *pos++ = WLAN_EID_SSID;
2262 *pos++ = ifsta->ssid_len;
2263 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2264
2265 rates = bss->supp_rates_len;
2266 if (rates > 8)
2267 rates = 8;
2268 pos = skb_put(skb, 2 + rates);
2269 *pos++ = WLAN_EID_SUPP_RATES;
2270 *pos++ = rates;
2271 memcpy(pos, bss->supp_rates, rates);
2272
2273 pos = skb_put(skb, 2 + 1);
2274 *pos++ = WLAN_EID_DS_PARAMS;
2275 *pos++ = 1;
2276 *pos++ = bss->channel;
2277
2278 pos = skb_put(skb, 2 + 2);
2279 *pos++ = WLAN_EID_IBSS_PARAMS;
2280 *pos++ = 2;
2281 /* FIX: set ATIM window based on scan results */
2282 *pos++ = 0;
2283 *pos++ = 0;
2284
2285 if (bss->supp_rates_len > 8) {
2286 rates = bss->supp_rates_len - 8;
2287 pos = skb_put(skb, 2 + rates);
2288 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2289 *pos++ = rates;
2290 memcpy(pos, &bss->supp_rates[8], rates);
2291 }
2292
2293 memset(&control, 0, sizeof(control));
2294 memset(&extra, 0, sizeof(extra));
2295 extra.mode = local->oper_hw_mode;
2296 rate = rate_control_get_rate(local, dev, skb, &extra);
2297 if (!rate) {
2298 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2299 "for IBSS beacon\n", dev->name);
2300 break;
2301 }
7e9ed188 2302 control.tx_rate = (sdata->short_preamble &&
f0706e82
JB		 2303 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2304 rate->val2 : rate->val;
2305 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2306 control.power_level = local->hw.conf.power_level;
2307 control.flags |= IEEE80211_TXCTL_NO_ACK;
2308 control.retry_limit = 1;
2309
2310 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2311 if (ifsta->probe_resp) {
2312 mgmt = (struct ieee80211_mgmt *)
2313 ifsta->probe_resp->data;
2314 mgmt->frame_control =
2315 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2316 IEEE80211_STYPE_PROBE_RESP);
2317 } else {
2318 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2319 "template for IBSS\n", dev->name);
2320 }
2321
2322 if (local->ops->beacon_update &&
2323 local->ops->beacon_update(local_to_hw(local),
2324 skb, &control) == 0) {
2325 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2326 "template based on scan results\n", dev->name);
2327 skb = NULL;
2328 }
2329
2330 rates = 0;
2331 mode = local->oper_hw_mode;
2332 for (i = 0; i < bss->supp_rates_len; i++) {
2333 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2334 if (mode->mode == MODE_ATHEROS_TURBO)
2335 bitrate *= 2;
2336 for (j = 0; j < mode->num_rates; j++)
2337 if (mode->rates[j].rate == bitrate)
2338 rates |= BIT(j);
2339 }
2340 ifsta->supp_rates_bits = rates;
2341 } while (0);
2342
2343 if (skb) {
2344 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2345 "template\n", dev->name);
2346 dev_kfree_skb(skb);
2347 }
2348
2349 ifsta->state = IEEE80211_IBSS_JOINED;
2350 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2351
2352 ieee80211_rx_bss_put(dev, bss);
2353
2354 return res;
2355}
2356
2357
2358static int ieee80211_sta_create_ibss(struct net_device *dev,
2359 struct ieee80211_if_sta *ifsta)
2360{
2361 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2362 struct ieee80211_sta_bss *bss;
2363 struct ieee80211_sub_if_data *sdata;
2364 struct ieee80211_hw_mode *mode;
2365 u8 bssid[ETH_ALEN], *pos;
2366 int i;
2367
2368#if 0
2369 /* Easier testing, use fixed BSSID. */
2370 memset(bssid, 0xfe, ETH_ALEN);
2371#else
2372 /* Generate random, not broadcast, locally administered BSSID. Mix in
2373 * own MAC address to make sure that devices that do not have proper
2374 * random number generator get different BSSID. */
2375 get_random_bytes(bssid, ETH_ALEN);
2376 for (i = 0; i < ETH_ALEN; i++)
2377 bssid[i] ^= dev->dev_addr[i];
2378 bssid[0] &= ~0x01;
2379 bssid[0] |= 0x02;
2380#endif
2381
2382 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2383 dev->name, MAC_ARG(bssid));
2384
2385 bss = ieee80211_rx_bss_add(dev, bssid);
2386 if (!bss)
2387 return -ENOMEM;
2388
2389 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2390 mode = local->oper_hw_mode;
2391
2392 if (local->hw.conf.beacon_int == 0)
2393 local->hw.conf.beacon_int = 100;
2394 bss->beacon_int = local->hw.conf.beacon_int;
2395 bss->hw_mode = local->hw.conf.phymode;
2396 bss->channel = local->hw.conf.channel;
2397 bss->freq = local->hw.conf.freq;
2398 bss->last_update = jiffies;
2399 bss->capability = WLAN_CAPABILITY_IBSS;
2400 if (sdata->default_key) {
2401 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2402 } else
2403 sdata->drop_unencrypted = 0;
2404 bss->supp_rates_len = mode->num_rates;
2405 pos = bss->supp_rates;
2406 for (i = 0; i < mode->num_rates; i++) {
2407 int rate = mode->rates[i].rate;
2408 if (mode->mode == MODE_ATHEROS_TURBO)
2409 rate /= 2;
2410 *pos++ = (u8) (rate / 5);
2411 }
2412
2413 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2414}
2415
2416
2417static int ieee80211_sta_find_ibss(struct net_device *dev,
2418 struct ieee80211_if_sta *ifsta)
2419{
2420 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2421 struct ieee80211_sta_bss *bss;
2422 int found = 0;
2423 u8 bssid[ETH_ALEN];
2424 int active_ibss;
2425
2426 if (ifsta->ssid_len == 0)
2427 return -EINVAL;
2428
2429 active_ibss = ieee80211_sta_active_ibss(dev);
2430#ifdef CONFIG_MAC80211_IBSS_DEBUG
2431 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2432 dev->name, active_ibss);
2433#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2434 spin_lock_bh(&local->sta_bss_lock);
2435 list_for_each_entry(bss, &local->sta_bss_list, list) {
2436 if (ifsta->ssid_len != bss->ssid_len ||
2437 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2438 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2439 continue;
2440#ifdef CONFIG_MAC80211_IBSS_DEBUG
2441 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2442 MAC_ARG(bss->bssid));
2443#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2444 memcpy(bssid, bss->bssid, ETH_ALEN);
2445 found = 1;
2446 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2447 break;
2448 }
2449 spin_unlock_bh(&local->sta_bss_lock);
2450
2451#ifdef CONFIG_MAC80211_IBSS_DEBUG
2452 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2453 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2454#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2455 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2456 (bss = ieee80211_rx_bss_get(dev, bssid))) {
2457 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2458 " based on configured SSID\n",
2459 dev->name, MAC_ARG(bssid));
2460 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2461 }
2462#ifdef CONFIG_MAC80211_IBSS_DEBUG
2463 printk(KERN_DEBUG " did not try to join ibss\n");
2464#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2465
2466 /* Selected IBSS not found in current scan results - try to scan */
2467 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2468 !ieee80211_sta_active_ibss(dev)) {
2469 mod_timer(&ifsta->timer, jiffies +
2470 IEEE80211_IBSS_MERGE_INTERVAL);
2471 } else if (time_after(jiffies, local->last_scan_completed +
2472 IEEE80211_SCAN_INTERVAL)) {
2473 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2474 "join\n", dev->name);
2475 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2476 ifsta->ssid_len);
2477 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2478 int interval = IEEE80211_SCAN_INTERVAL;
2479
2480 if (time_after(jiffies, ifsta->ibss_join_req +
2481 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2482 if (ifsta->create_ibss &&
2483 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2484 return ieee80211_sta_create_ibss(dev, ifsta);
2485 if (ifsta->create_ibss) {
2486 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2487 " configured channel %d (%d MHz)\n",
2488 dev->name, local->hw.conf.channel,
2489 local->hw.conf.freq);
2490 }
2491
2492 /* No IBSS found - decrease scan interval and continue
2493 * scanning. */
2494 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2495 }
2496
2497 ifsta->state = IEEE80211_IBSS_SEARCH;
2498 mod_timer(&ifsta->timer, jiffies + interval);
2499 return 0;
2500 }
2501
2502 return 0;
2503}
2504
2505
2506int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2507{
2508 struct ieee80211_sub_if_data *sdata;
2509 struct ieee80211_if_sta *ifsta;
2510 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2511
2512 if (len > IEEE80211_MAX_SSID_LEN)
2513 return -EINVAL;
2514
2515 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2516 * not defined. */
2517 if (local->ops->conf_tx) {
2518 struct ieee80211_tx_queue_params qparam;
2519 int i;
2520
2521 memset(&qparam, 0, sizeof(qparam));
2522 /* TODO: are these ok defaults for all hw_modes? */
2523 qparam.aifs = 2;
2524 qparam.cw_min =
2525 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2526 qparam.cw_max = 1023;
2527 qparam.burst_time = 0;
2528 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2529 {
2530 local->ops->conf_tx(local_to_hw(local),
2531 i + IEEE80211_TX_QUEUE_DATA0,
2532 &qparam);
2533 }
2534 /* IBSS uses different parameters for Beacon sending */
2535 qparam.cw_min++;
2536 qparam.cw_min *= 2;
2537 qparam.cw_min--;
2538 local->ops->conf_tx(local_to_hw(local),
2539 IEEE80211_TX_QUEUE_BEACON, &qparam);
2540 }
2541
2542 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2543 ifsta = &sdata->u.sta;
2544
2545 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2546 ifsta->prev_bssid_set = 0;
2547 memcpy(ifsta->ssid, ssid, len);
2548 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2549 ifsta->ssid_len = len;
2550
2551 ifsta->ssid_set = len ? 1 : 0;
2552 if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2553 ifsta->ibss_join_req = jiffies;
2554 ifsta->state = IEEE80211_IBSS_SEARCH;
2555 return ieee80211_sta_find_ibss(dev, ifsta);
2556 }
2557 return 0;
2558}
2559
2560
2561int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2562{
2563 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2564 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2565 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2566 *len = ifsta->ssid_len;
2567 return 0;
2568}
2569
2570
2571int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2572{
2573 struct ieee80211_sub_if_data *sdata;
2574 struct ieee80211_if_sta *ifsta;
2575 int res;
2576
2577 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2578 ifsta = &sdata->u.sta;
2579
2580 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2581 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2582 res = ieee80211_if_config(dev);
2583 if (res) {
2584 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2585 "the low-level driver\n", dev->name);
2586 return res;
2587 }
2588 }
2589
2590 if (!is_valid_ether_addr(bssid))
2591 ifsta->bssid_set = 0;
2592 else
2593 ifsta->bssid_set = 1;
2594 return 0;
2595}
2596
2597
2598static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2599 struct ieee80211_sub_if_data *sdata,
2600 int powersave)
2601{
2602 struct sk_buff *skb;
2603 struct ieee80211_hdr *nullfunc;
2604 u16 fc;
2605
2606 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2607 if (!skb) {
2608 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2609 "frame\n", sdata->dev->name);
2610 return;
2611 }
2612 skb_reserve(skb, local->hw.extra_tx_headroom);
2613
2614 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2615 memset(nullfunc, 0, 24);
2616 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2617 IEEE80211_FCTL_TODS;
2618 if (powersave)
2619 fc |= IEEE80211_FCTL_PM;
2620 nullfunc->frame_control = cpu_to_le16(fc);
2621 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2622 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2623 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2624
2625 ieee80211_sta_tx(sdata->dev, skb, 0);
2626}
2627
2628
2629void ieee80211_scan_completed(struct ieee80211_hw *hw)
2630{
2631 struct ieee80211_local *local = hw_to_local(hw);
2632 struct net_device *dev = local->scan_dev;
2633 struct ieee80211_sub_if_data *sdata;
2634 union iwreq_data wrqu;
2635
2636 local->last_scan_completed = jiffies;
2637 wmb();
2638 local->sta_scanning = 0;
2639
2640 if (ieee80211_hw_config(local))
2641 printk(KERN_DEBUG "%s: failed to restore operational"
2642 "channel after scan\n", dev->name);
2643
2644 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2645 ieee80211_if_config(dev))
2646 printk(KERN_DEBUG "%s: failed to restore operational"
2647 "BSSID after scan\n", dev->name);
2648
2649 memset(&wrqu, 0, sizeof(wrqu));
2650 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2651
2652 read_lock(&local->sub_if_lock);
2653 list_for_each_entry(sdata, &local->sub_if_list, list) {
14042cbe
MN		 2654
2655 /* No need to wake the master device. */
2656 if (sdata->dev == local->mdev)
2657 continue;
2658
f0706e82
JB		 2659 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2660 if (sdata->u.sta.associated)
2661 ieee80211_send_nullfunc(local, sdata, 0);
2662 ieee80211_sta_timer((unsigned long)sdata);
2663 }
14042cbe 2664
f0706e82
JB		 2665 netif_wake_queue(sdata->dev);
2666 }
2667 read_unlock(&local->sub_if_lock);
2668
2669 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2670 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2671 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2672 if (!ifsta->bssid_set ||
2673 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2674 !ieee80211_sta_active_ibss(dev)))
2675 ieee80211_sta_find_ibss(dev, ifsta);
2676 }
2677}
2678EXPORT_SYMBOL(ieee80211_scan_completed);
2679
2680void ieee80211_sta_scan_work(struct work_struct *work)
2681{
2682 struct ieee80211_local *local =
2683 container_of(work, struct ieee80211_local, scan_work.work);
2684 struct net_device *dev = local->scan_dev;
2685 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2686 struct ieee80211_hw_mode *mode;
2687 struct ieee80211_channel *chan;
2688 int skip;
2689 unsigned long next_delay = 0;
2690
2691 if (!local->sta_scanning)
2692 return;
2693
2694 switch (local->scan_state) {
2695 case SCAN_SET_CHANNEL:
2696 mode = local->scan_hw_mode;
2697 if (local->scan_hw_mode->list.next == &local->modes_list &&
2698 local->scan_channel_idx >= mode->num_channels) {
2699 ieee80211_scan_completed(local_to_hw(local));
2700 return;
2701 }
2702 skip = !(local->enabled_modes & (1 << mode->mode));
2703 chan = &mode->channels[local->scan_channel_idx];
2704 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2705 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2706 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2707 (local->hw_modes & local->enabled_modes &
2708 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2709 skip = 1;
2710
2711 if (!skip) {
2712#if 0
2713 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2714 dev->name, chan->chan, chan->freq);
2715#endif
2716
2717 local->scan_channel = chan;
2718 if (ieee80211_hw_config(local)) {
2719 printk(KERN_DEBUG "%s: failed to set channel "
2720 "%d (%d MHz) for scan\n", dev->name,
2721 chan->chan, chan->freq);
2722 skip = 1;
2723 }
2724 }
2725
2726 local->scan_channel_idx++;
2727 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2728 if (local->scan_hw_mode->list.next != &local->modes_list) {
2729 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2730 struct ieee80211_hw_mode,
2731 list);
2732 local->scan_channel_idx = 0;
2733 }
2734 }
2735
2736 if (skip)
2737 break;
2738
2739 next_delay = IEEE80211_PROBE_DELAY +
2740 usecs_to_jiffies(local->hw.channel_change_time);
2741 local->scan_state = SCAN_SEND_PROBE;
2742 break;
2743 case SCAN_SEND_PROBE:
2744 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2745 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2746 local->scan_ssid_len);
2747 next_delay = IEEE80211_CHANNEL_TIME;
2748 } else
2749 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2750 local->scan_state = SCAN_SET_CHANNEL;
2751 break;
2752 }
2753
2754 if (local->sta_scanning)
2755 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2756 next_delay);
2757}
2758
2759
2760static int ieee80211_sta_start_scan(struct net_device *dev,
2761 u8 *ssid, size_t ssid_len)
2762{
2763 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2764 struct ieee80211_sub_if_data *sdata;
2765
2766 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2767 return -EINVAL;
2768
2769 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2770 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2771 * BSSID: MACAddress
2772 * SSID
2773 * ScanType: ACTIVE, PASSIVE
2774 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2775 * a Probe frame during active scanning
2776 * ChannelList
2777 * MinChannelTime (>= ProbeDelay), in TU
2778 * MaxChannelTime: (>= MinChannelTime), in TU
2779 */
2780
2781 /* MLME-SCAN.confirm
2782 * BSSDescriptionSet
2783 * ResultCode: SUCCESS, INVALID_PARAMETERS
2784 */
2785
2786 if (local->sta_scanning) {
2787 if (local->scan_dev == dev)
2788 return 0;
2789 return -EBUSY;
2790 }
2791
2792 if (local->ops->hw_scan) {
2793 int rc = local->ops->hw_scan(local_to_hw(local),
2794 ssid, ssid_len);
2795 if (!rc) {
2796 local->sta_scanning = 1;
2797 local->scan_dev = dev;
2798 }
2799 return rc;
2800 }
2801
2802 local->sta_scanning = 1;
2803
2804 read_lock(&local->sub_if_lock);
2805 list_for_each_entry(sdata, &local->sub_if_list, list) {
14042cbe
MN		 2806
2807 /* Don't stop the master interface, otherwise we can't transmit
2808 * probes! */
2809 if (sdata->dev == local->mdev)
2810 continue;
2811
f0706e82
JB		 2812 netif_stop_queue(sdata->dev);
2813 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2814 sdata->u.sta.associated)
2815 ieee80211_send_nullfunc(local, sdata, 1);
2816 }
2817 read_unlock(&local->sub_if_lock);
2818
2819 if (ssid) {
2820 local->scan_ssid_len = ssid_len;
2821 memcpy(local->scan_ssid, ssid, ssid_len);
2822 } else
2823 local->scan_ssid_len = 0;
2824 local->scan_state = SCAN_SET_CHANNEL;
2825 local->scan_hw_mode = list_entry(local->modes_list.next,
2826 struct ieee80211_hw_mode,
2827 list);
2828 local->scan_channel_idx = 0;
2829 local->scan_dev = dev;
2830
2831 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2832 ieee80211_if_config(dev))
2833 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2834 dev->name);
2835
2836 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2837 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2838 IEEE80211_CHANNEL_TIME);
2839
2840 return 0;
2841}
2842
2843
2844int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2845{
2846 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2847 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2848 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2849
2850 if (sdata->type != IEEE80211_IF_TYPE_STA)
2851 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2852
2853 if (local->sta_scanning) {
2854 if (local->scan_dev == dev)
2855 return 0;
2856 return -EBUSY;
2857 }
2858
2859 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2860 queue_work(local->hw.workqueue, &ifsta->work);
2861 return 0;
2862}
2863
2864static char *
2865ieee80211_sta_scan_result(struct net_device *dev,
2866 struct ieee80211_sta_bss *bss,
2867 char *current_ev, char *end_buf)
2868{
2869 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2870 struct iw_event iwe;
2871
2872 if (time_after(jiffies,
2873 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2874 return current_ev;
2875
2876 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2877 return current_ev;
2878
2879 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2880 !bss->wpa_ie && !bss->rsn_ie)
2881 return current_ev;
2882
2883 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2884 (local->scan_ssid_len != bss->ssid_len ||
2885 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2886 return current_ev;
2887
2888 memset(&iwe, 0, sizeof(iwe));
2889 iwe.cmd = SIOCGIWAP;
2890 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2891 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2892 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2893 IW_EV_ADDR_LEN);
2894
2895 memset(&iwe, 0, sizeof(iwe));
2896 iwe.cmd = SIOCGIWESSID;
2897 iwe.u.data.length = bss->ssid_len;
2898 iwe.u.data.flags = 1;
2899 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2900 bss->ssid);
2901
2902 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2903 memset(&iwe, 0, sizeof(iwe));
2904 iwe.cmd = SIOCGIWMODE;
2905 if (bss->capability & WLAN_CAPABILITY_ESS)
2906 iwe.u.mode = IW_MODE_MASTER;
2907 else
2908 iwe.u.mode = IW_MODE_ADHOC;
2909 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2910 IW_EV_UINT_LEN);
2911 }
2912
2913 memset(&iwe, 0, sizeof(iwe));
2914 iwe.cmd = SIOCGIWFREQ;
2915 iwe.u.freq.m = bss->channel;
2916 iwe.u.freq.e = 0;
2917 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2918 IW_EV_FREQ_LEN);
2919 iwe.u.freq.m = bss->freq * 100000;
2920 iwe.u.freq.e = 1;
2921 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2922 IW_EV_FREQ_LEN);
2923
2924 memset(&iwe, 0, sizeof(iwe));
2925 iwe.cmd = IWEVQUAL;
2926 iwe.u.qual.qual = bss->signal;
2927 iwe.u.qual.level = bss->rssi;
2928 iwe.u.qual.noise = bss->noise;
2929 iwe.u.qual.updated = local->wstats_flags;
2930 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2931 IW_EV_QUAL_LEN);
2932
2933 memset(&iwe, 0, sizeof(iwe));
2934 iwe.cmd = SIOCGIWENCODE;
2935 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2936 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2937 else
2938 iwe.u.data.flags = IW_ENCODE_DISABLED;
2939 iwe.u.data.length = 0;
2940 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2941
2942 if (bss && bss->wpa_ie) {
2943 memset(&iwe, 0, sizeof(iwe));
2944 iwe.cmd = IWEVGENIE;
2945 iwe.u.data.length = bss->wpa_ie_len;
2946 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2947 bss->wpa_ie);
2948 }
2949
2950 if (bss && bss->rsn_ie) {
2951 memset(&iwe, 0, sizeof(iwe));
2952 iwe.cmd = IWEVGENIE;
2953 iwe.u.data.length = bss->rsn_ie_len;
2954 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2955 bss->rsn_ie);
2956 }
2957
2958 if (bss && bss->supp_rates_len > 0) {
2959 /* display all supported rates in readable format */
2960 char *p = current_ev + IW_EV_LCP_LEN;
2961 int i;
2962
2963 memset(&iwe, 0, sizeof(iwe));
2964 iwe.cmd = SIOCGIWRATE;
2965 /* Those two flags are ignored... */
2966 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2967
2968 for (i = 0; i < bss->supp_rates_len; i++) {
2969 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2970 0x7f) * 500000);
2971 p = iwe_stream_add_value(current_ev, p,
2972 end_buf, &iwe, IW_EV_PARAM_LEN);
2973 }
2974 current_ev = p;
2975 }
2976
2977 if (bss) {
2978 char *buf;
2979 buf = kmalloc(30, GFP_ATOMIC);
2980 if (buf) {
2981 memset(&iwe, 0, sizeof(iwe));
2982 iwe.cmd = IWEVCUSTOM;
2983 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2984 iwe.u.data.length = strlen(buf);
2985 current_ev = iwe_stream_add_point(current_ev, end_buf,
2986 &iwe, buf);
2987 kfree(buf);
2988 }
2989 }
2990
2991 do {
2992 char *buf;
2993
2994 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2995 break;
2996
2997 buf = kmalloc(100, GFP_ATOMIC);
2998 if (!buf)
2999 break;
3000
3001 memset(&iwe, 0, sizeof(iwe));
3002 iwe.cmd = IWEVCUSTOM;
3003 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3004 iwe.u.data.length = strlen(buf);
3005 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3006 buf);
3007
3008 memset(&iwe, 0, sizeof(iwe));
3009 iwe.cmd = IWEVCUSTOM;
3010 sprintf(buf, "capab=0x%04x", bss->capability);
3011 iwe.u.data.length = strlen(buf);
3012 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3013 buf);
3014
3015 kfree(buf);
3016 break;
3017 } while (0);
3018
3019 return current_ev;
3020}
3021
3022
3023int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3024{
3025 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3026 char *current_ev = buf;
3027 char *end_buf = buf + len;
3028 struct ieee80211_sta_bss *bss;
3029
3030 spin_lock_bh(&local->sta_bss_lock);
3031 list_for_each_entry(bss, &local->sta_bss_list, list) {
3032 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3033 spin_unlock_bh(&local->sta_bss_lock);
3034 return -E2BIG;
3035 }
3036 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3037 end_buf);
3038 }
3039 spin_unlock_bh(&local->sta_bss_lock);
3040 return current_ev - buf;
3041}
3042
3043
3044int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3045{
3046 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3047 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3048 kfree(ifsta->extra_ie);
3049 if (len == 0) {
3050 ifsta->extra_ie = NULL;
3051 ifsta->extra_ie_len = 0;
3052 return 0;
3053 }
3054 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3055 if (!ifsta->extra_ie) {
3056 ifsta->extra_ie_len = 0;
3057 return -ENOMEM;
3058 }
3059 memcpy(ifsta->extra_ie, ie, len);
3060 ifsta->extra_ie_len = len;
3061 return 0;
3062}
3063
3064
3065struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3066 struct sk_buff *skb, u8 *bssid,
3067 u8 *addr)
3068{
3069 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3070 struct sta_info *sta;
91fa558b 3071 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 3072
3073 /* TODO: Could consider removing the least recently used entry and
3074 * allow new one to be added. */
3075 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3076 if (net_ratelimit()) {
3077 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3078 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3079 }
3080 return NULL;
3081 }
3082
3083 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3084 local->mdev->name, MAC_ARG(addr), dev->name);
3085
3086 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3087 if (!sta)
3088 return NULL;
3089
3090 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3091
3092 rate_control_rate_init(sta, local);
3093
3094 return sta; /* caller will call sta_info_put() */
3095}
3096
3097
3098int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3099{
3100 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3101 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3102
3103 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3104 dev->name, reason);
3105
3106 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3107 sdata->type != IEEE80211_IF_TYPE_IBSS)
3108 return -EINVAL;
3109
3110 ieee80211_send_deauth(dev, ifsta, reason);
3111 ieee80211_set_disassoc(dev, ifsta, 1);
3112 return 0;
3113}
3114
3115
3116int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3117{
3118 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3119 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3120
3121 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3122 dev->name, reason);
3123
3124 if (sdata->type != IEEE80211_IF_TYPE_STA)
3125 return -EINVAL;
3126
3127 if (!ifsta->associated)
3128 return -1;
3129
3130 ieee80211_send_disassoc(dev, ifsta, reason);
3131 ieee80211_set_disassoc(dev, ifsta, 0);
3132 return 0;
3133}
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