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[MAC80211]: remove turbo modes
[deliverable/linux.git] / net / mac80211 / ieee80211_sta.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 /* TODO:
15 * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
16 * order BSS list by RSSI(?) ("quality of AP")
17 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
18 * SSID)
19 */
20 #include <linux/delay.h>
21 #include <linux/if_ether.h>
22 #include <linux/skbuff.h>
23 #include <linux/netdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/wireless.h>
26 #include <linux/random.h>
27 #include <linux/etherdevice.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
30
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
33 #include "ieee80211_rate.h"
34 #include "hostapd_ioctl.h"
35
36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
40 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
41 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
42 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
43 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
44 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
45 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
46
47 #define IEEE80211_PROBE_DELAY (HZ / 33)
48 #define IEEE80211_CHANNEL_TIME (HZ / 33)
49 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
50 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
51 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
52 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
53
54 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
55
56
57 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
58
59 #define ERP_INFO_USE_PROTECTION BIT(1)
60
61 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
62 u8 *ssid, size_t ssid_len);
63 static struct ieee80211_sta_bss *
64 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
65 static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67 static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69 static int ieee80211_sta_wep_configured(struct net_device *dev);
70 static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72 static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76 /* Parsed Information Elements */
77 struct ieee802_11_elems {
78 /* pointers to IEs */
79 u8 *ssid;
80 u8 *supp_rates;
81 u8 *fh_params;
82 u8 *ds_params;
83 u8 *cf_params;
84 u8 *tim;
85 u8 *ibss_params;
86 u8 *challenge;
87 u8 *wpa;
88 u8 *rsn;
89 u8 *erp_info;
90 u8 *ext_supp_rates;
91 u8 *wmm_info;
92 u8 *wmm_param;
93
94 /* length of them, respectively */
95 u8 ssid_len;
96 u8 supp_rates_len;
97 u8 fh_params_len;
98 u8 ds_params_len;
99 u8 cf_params_len;
100 u8 tim_len;
101 u8 ibss_params_len;
102 u8 challenge_len;
103 u8 wpa_len;
104 u8 rsn_len;
105 u8 erp_info_len;
106 u8 ext_supp_rates_len;
107 u8 wmm_info_len;
108 u8 wmm_param_len;
109 };
110
111 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
112
113
114 static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
115 struct ieee802_11_elems *elems)
116 {
117 size_t left = len;
118 u8 *pos = start;
119 int unknown = 0;
120
121 memset(elems, 0, sizeof(*elems));
122
123 while (left >= 2) {
124 u8 id, elen;
125
126 id = *pos++;
127 elen = *pos++;
128 left -= 2;
129
130 if (elen > left) {
131 #if 0
132 if (net_ratelimit())
133 printk(KERN_DEBUG "IEEE 802.11 element parse "
134 "failed (id=%d elen=%d left=%d)\n",
135 id, elen, left);
136 #endif
137 return ParseFailed;
138 }
139
140 switch (id) {
141 case WLAN_EID_SSID:
142 elems->ssid = pos;
143 elems->ssid_len = elen;
144 break;
145 case WLAN_EID_SUPP_RATES:
146 elems->supp_rates = pos;
147 elems->supp_rates_len = elen;
148 break;
149 case WLAN_EID_FH_PARAMS:
150 elems->fh_params = pos;
151 elems->fh_params_len = elen;
152 break;
153 case WLAN_EID_DS_PARAMS:
154 elems->ds_params = pos;
155 elems->ds_params_len = elen;
156 break;
157 case WLAN_EID_CF_PARAMS:
158 elems->cf_params = pos;
159 elems->cf_params_len = elen;
160 break;
161 case WLAN_EID_TIM:
162 elems->tim = pos;
163 elems->tim_len = elen;
164 break;
165 case WLAN_EID_IBSS_PARAMS:
166 elems->ibss_params = pos;
167 elems->ibss_params_len = elen;
168 break;
169 case WLAN_EID_CHALLENGE:
170 elems->challenge = pos;
171 elems->challenge_len = elen;
172 break;
173 case WLAN_EID_WPA:
174 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
175 pos[2] == 0xf2) {
176 /* Microsoft OUI (00:50:F2) */
177 if (pos[3] == 1) {
178 /* OUI Type 1 - WPA IE */
179 elems->wpa = pos;
180 elems->wpa_len = elen;
181 } else if (elen >= 5 && pos[3] == 2) {
182 if (pos[4] == 0) {
183 elems->wmm_info = pos;
184 elems->wmm_info_len = elen;
185 } else if (pos[4] == 1) {
186 elems->wmm_param = pos;
187 elems->wmm_param_len = elen;
188 }
189 }
190 }
191 break;
192 case WLAN_EID_RSN:
193 elems->rsn = pos;
194 elems->rsn_len = elen;
195 break;
196 case WLAN_EID_ERP_INFO:
197 elems->erp_info = pos;
198 elems->erp_info_len = elen;
199 break;
200 case WLAN_EID_EXT_SUPP_RATES:
201 elems->ext_supp_rates = pos;
202 elems->ext_supp_rates_len = elen;
203 break;
204 default:
205 #if 0
206 printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
207 "unknown element (id=%d elen=%d)\n",
208 id, elen);
209 #endif
210 unknown++;
211 break;
212 }
213
214 left -= elen;
215 pos += elen;
216 }
217
218 /* Do not trigger error if left == 1 as Apple Airport base stations
219 * send AssocResps that are one spurious byte too long. */
220
221 return unknown ? ParseUnknown : ParseOK;
222 }
223
224
225
226
227 static int ecw2cw(int ecw)
228 {
229 int cw = 1;
230 while (ecw > 0) {
231 cw <<= 1;
232 ecw--;
233 }
234 return cw - 1;
235 }
236
237 static void ieee80211_sta_wmm_params(struct net_device *dev,
238 struct ieee80211_if_sta *ifsta,
239 u8 *wmm_param, size_t wmm_param_len)
240 {
241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
242 struct ieee80211_tx_queue_params params;
243 size_t left;
244 int count;
245 u8 *pos;
246
247 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
248 return;
249 count = wmm_param[6] & 0x0f;
250 if (count == ifsta->wmm_last_param_set)
251 return;
252 ifsta->wmm_last_param_set = count;
253
254 pos = wmm_param + 8;
255 left = wmm_param_len - 8;
256
257 memset(&params, 0, sizeof(params));
258
259 if (!local->ops->conf_tx)
260 return;
261
262 local->wmm_acm = 0;
263 for (; left >= 4; left -= 4, pos += 4) {
264 int aci = (pos[0] >> 5) & 0x03;
265 int acm = (pos[0] >> 4) & 0x01;
266 int queue;
267
268 switch (aci) {
269 case 1:
270 queue = IEEE80211_TX_QUEUE_DATA3;
271 if (acm) {
272 local->wmm_acm |= BIT(0) | BIT(3);
273 }
274 break;
275 case 2:
276 queue = IEEE80211_TX_QUEUE_DATA1;
277 if (acm) {
278 local->wmm_acm |= BIT(4) | BIT(5);
279 }
280 break;
281 case 3:
282 queue = IEEE80211_TX_QUEUE_DATA0;
283 if (acm) {
284 local->wmm_acm |= BIT(6) | BIT(7);
285 }
286 break;
287 case 0:
288 default:
289 queue = IEEE80211_TX_QUEUE_DATA2;
290 if (acm) {
291 local->wmm_acm |= BIT(1) | BIT(2);
292 }
293 break;
294 }
295
296 params.aifs = pos[0] & 0x0f;
297 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
298 params.cw_min = ecw2cw(pos[1] & 0x0f);
299 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
300 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
301 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
302 "cWmin=%d cWmax=%d burst=%d\n",
303 dev->name, queue, aci, acm, params.aifs, params.cw_min,
304 params.cw_max, params.burst_time);
305 /* TODO: handle ACM (block TX, fallback to next lowest allowed
306 * AC for now) */
307 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
308 printk(KERN_DEBUG "%s: failed to set TX queue "
309 "parameters for queue %d\n", dev->name, queue);
310 }
311 }
312 }
313
314
315 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
316 {
317 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
318 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
319 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
320 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
321 u8 changes = 0;
322
323 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
324 if (net_ratelimit()) {
325 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
326 MAC_FMT ")\n",
327 dev->name,
328 use_protection ? "enabled" : "disabled",
329 MAC_ARG(ifsta->bssid));
330 }
331 if (use_protection)
332 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
333 else
334 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
335 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
336 }
337
338 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
339 if (net_ratelimit()) {
340 printk(KERN_DEBUG "%s: switched to %s barker preamble"
341 " (BSSID=" MAC_FMT ")\n",
342 dev->name,
343 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
344 "short" : "long",
345 MAC_ARG(ifsta->bssid));
346 }
347 if (preamble_mode)
348 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
349 else
350 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
351 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
352 }
353
354 if (changes)
355 ieee80211_erp_info_change_notify(dev, changes);
356 }
357
358
359 static void ieee80211_sta_send_associnfo(struct net_device *dev,
360 struct ieee80211_if_sta *ifsta)
361 {
362 char *buf;
363 size_t len;
364 int i;
365 union iwreq_data wrqu;
366
367 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
368 return;
369
370 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
371 ifsta->assocresp_ies_len), GFP_KERNEL);
372 if (!buf)
373 return;
374
375 len = sprintf(buf, "ASSOCINFO(");
376 if (ifsta->assocreq_ies) {
377 len += sprintf(buf + len, "ReqIEs=");
378 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
379 len += sprintf(buf + len, "%02x",
380 ifsta->assocreq_ies[i]);
381 }
382 }
383 if (ifsta->assocresp_ies) {
384 if (ifsta->assocreq_ies)
385 len += sprintf(buf + len, " ");
386 len += sprintf(buf + len, "RespIEs=");
387 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
388 len += sprintf(buf + len, "%02x",
389 ifsta->assocresp_ies[i]);
390 }
391 }
392 len += sprintf(buf + len, ")");
393
394 if (len > IW_CUSTOM_MAX) {
395 len = sprintf(buf, "ASSOCRESPIE=");
396 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
397 len += sprintf(buf + len, "%02x",
398 ifsta->assocresp_ies[i]);
399 }
400 }
401
402 memset(&wrqu, 0, sizeof(wrqu));
403 wrqu.data.length = len;
404 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
405
406 kfree(buf);
407 }
408
409
410 static void ieee80211_set_associated(struct net_device *dev,
411 struct ieee80211_if_sta *ifsta,
412 unsigned int assoc)
413 {
414 union iwreq_data wrqu;
415
416 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
417 return;
418
419 if (assoc) {
420 struct ieee80211_sub_if_data *sdata;
421 struct ieee80211_sta_bss *bss;
422
423 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
424
425 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
426 if (sdata->type != IEEE80211_IF_TYPE_STA)
427 return;
428
429 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
430 if (bss) {
431 if (bss->has_erp_value)
432 ieee80211_handle_erp_ie(dev, bss->erp_value);
433 ieee80211_rx_bss_put(dev, bss);
434 }
435
436 netif_carrier_on(dev);
437 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
438 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
439 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
440 ieee80211_sta_send_associnfo(dev, ifsta);
441 } else {
442 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
443
444 netif_carrier_off(dev);
445 ieee80211_reset_erp_info(dev);
446 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
447 }
448 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
449 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
450 ifsta->last_probe = jiffies;
451 }
452
453 static void ieee80211_set_disassoc(struct net_device *dev,
454 struct ieee80211_if_sta *ifsta, int deauth)
455 {
456 if (deauth)
457 ifsta->auth_tries = 0;
458 ifsta->assoc_tries = 0;
459 ieee80211_set_associated(dev, ifsta, 0);
460 }
461
462 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
463 int encrypt)
464 {
465 struct ieee80211_sub_if_data *sdata;
466 struct ieee80211_tx_packet_data *pkt_data;
467
468 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
469 skb->dev = sdata->local->mdev;
470 skb_set_mac_header(skb, 0);
471 skb_set_network_header(skb, 0);
472 skb_set_transport_header(skb, 0);
473
474 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
475 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
476 pkt_data->ifindex = sdata->dev->ifindex;
477 if (sdata->type == IEEE80211_IF_TYPE_MGMT)
478 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
479 if (!encrypt)
480 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
481
482 dev_queue_xmit(skb);
483 }
484
485
486 static void ieee80211_send_auth(struct net_device *dev,
487 struct ieee80211_if_sta *ifsta,
488 int transaction, u8 *extra, size_t extra_len,
489 int encrypt)
490 {
491 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
492 struct sk_buff *skb;
493 struct ieee80211_mgmt *mgmt;
494
495 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
496 sizeof(*mgmt) + 6 + extra_len);
497 if (!skb) {
498 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
499 "frame\n", dev->name);
500 return;
501 }
502 skb_reserve(skb, local->hw.extra_tx_headroom);
503
504 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
505 memset(mgmt, 0, 24 + 6);
506 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
507 IEEE80211_STYPE_AUTH);
508 if (encrypt)
509 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
510 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
511 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
512 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
513 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
514 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
515 ifsta->auth_transaction = transaction + 1;
516 mgmt->u.auth.status_code = cpu_to_le16(0);
517 if (extra)
518 memcpy(skb_put(skb, extra_len), extra, extra_len);
519
520 ieee80211_sta_tx(dev, skb, encrypt);
521 }
522
523
524 static void ieee80211_authenticate(struct net_device *dev,
525 struct ieee80211_if_sta *ifsta)
526 {
527 ifsta->auth_tries++;
528 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
529 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
530 " timed out\n",
531 dev->name, MAC_ARG(ifsta->bssid));
532 ifsta->state = IEEE80211_DISABLED;
533 return;
534 }
535
536 ifsta->state = IEEE80211_AUTHENTICATE;
537 printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
538 dev->name, MAC_ARG(ifsta->bssid));
539
540 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
541
542 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
543 }
544
545
546 static void ieee80211_send_assoc(struct net_device *dev,
547 struct ieee80211_if_sta *ifsta)
548 {
549 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
550 struct ieee80211_hw_mode *mode;
551 struct sk_buff *skb;
552 struct ieee80211_mgmt *mgmt;
553 u8 *pos, *ies;
554 int i, len;
555 u16 capab;
556 struct ieee80211_sta_bss *bss;
557 int wmm = 0;
558
559 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
560 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
561 ifsta->ssid_len);
562 if (!skb) {
563 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
564 "frame\n", dev->name);
565 return;
566 }
567 skb_reserve(skb, local->hw.extra_tx_headroom);
568
569 mode = local->oper_hw_mode;
570 capab = ifsta->capab;
571 if (mode->mode == MODE_IEEE80211G) {
572 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
573 WLAN_CAPABILITY_SHORT_PREAMBLE;
574 }
575 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
576 if (bss) {
577 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
578 capab |= WLAN_CAPABILITY_PRIVACY;
579 if (bss->wmm_ie) {
580 wmm = 1;
581 }
582 ieee80211_rx_bss_put(dev, bss);
583 }
584
585 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
586 memset(mgmt, 0, 24);
587 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
588 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
589 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
590
591 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
592 skb_put(skb, 10);
593 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
594 IEEE80211_STYPE_REASSOC_REQ);
595 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
596 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
597 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
598 ETH_ALEN);
599 } else {
600 skb_put(skb, 4);
601 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
602 IEEE80211_STYPE_ASSOC_REQ);
603 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
604 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
605 }
606
607 /* SSID */
608 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
609 *pos++ = WLAN_EID_SSID;
610 *pos++ = ifsta->ssid_len;
611 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
612
613 len = mode->num_rates;
614 if (len > 8)
615 len = 8;
616 pos = skb_put(skb, len + 2);
617 *pos++ = WLAN_EID_SUPP_RATES;
618 *pos++ = len;
619 for (i = 0; i < len; i++) {
620 int rate = mode->rates[i].rate;
621 *pos++ = (u8) (rate / 5);
622 }
623
624 if (mode->num_rates > len) {
625 pos = skb_put(skb, mode->num_rates - len + 2);
626 *pos++ = WLAN_EID_EXT_SUPP_RATES;
627 *pos++ = mode->num_rates - len;
628 for (i = len; i < mode->num_rates; i++) {
629 int rate = mode->rates[i].rate;
630 *pos++ = (u8) (rate / 5);
631 }
632 }
633
634 if (ifsta->extra_ie) {
635 pos = skb_put(skb, ifsta->extra_ie_len);
636 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
637 }
638
639 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
640 pos = skb_put(skb, 9);
641 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
642 *pos++ = 7; /* len */
643 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
644 *pos++ = 0x50;
645 *pos++ = 0xf2;
646 *pos++ = 2; /* WME */
647 *pos++ = 0; /* WME info */
648 *pos++ = 1; /* WME ver */
649 *pos++ = 0;
650 }
651
652 kfree(ifsta->assocreq_ies);
653 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
654 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
655 if (ifsta->assocreq_ies)
656 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
657
658 ieee80211_sta_tx(dev, skb, 0);
659 }
660
661
662 static void ieee80211_send_deauth(struct net_device *dev,
663 struct ieee80211_if_sta *ifsta, u16 reason)
664 {
665 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
666 struct sk_buff *skb;
667 struct ieee80211_mgmt *mgmt;
668
669 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
670 if (!skb) {
671 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
672 "frame\n", dev->name);
673 return;
674 }
675 skb_reserve(skb, local->hw.extra_tx_headroom);
676
677 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
678 memset(mgmt, 0, 24);
679 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
680 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
681 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
682 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
683 IEEE80211_STYPE_DEAUTH);
684 skb_put(skb, 2);
685 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
686
687 ieee80211_sta_tx(dev, skb, 0);
688 }
689
690
691 static void ieee80211_send_disassoc(struct net_device *dev,
692 struct ieee80211_if_sta *ifsta, u16 reason)
693 {
694 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
695 struct sk_buff *skb;
696 struct ieee80211_mgmt *mgmt;
697
698 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
699 if (!skb) {
700 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
701 "frame\n", dev->name);
702 return;
703 }
704 skb_reserve(skb, local->hw.extra_tx_headroom);
705
706 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
707 memset(mgmt, 0, 24);
708 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
709 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
710 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
711 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
712 IEEE80211_STYPE_DISASSOC);
713 skb_put(skb, 2);
714 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
715
716 ieee80211_sta_tx(dev, skb, 0);
717 }
718
719
720 static int ieee80211_privacy_mismatch(struct net_device *dev,
721 struct ieee80211_if_sta *ifsta)
722 {
723 struct ieee80211_sta_bss *bss;
724 int res = 0;
725
726 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL) ||
727 ifsta->key_management_enabled)
728 return 0;
729
730 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
731 if (!bss)
732 return 0;
733
734 if (ieee80211_sta_wep_configured(dev) !=
735 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
736 res = 1;
737
738 ieee80211_rx_bss_put(dev, bss);
739
740 return res;
741 }
742
743
744 static void ieee80211_associate(struct net_device *dev,
745 struct ieee80211_if_sta *ifsta)
746 {
747 ifsta->assoc_tries++;
748 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
749 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
750 " timed out\n",
751 dev->name, MAC_ARG(ifsta->bssid));
752 ifsta->state = IEEE80211_DISABLED;
753 return;
754 }
755
756 ifsta->state = IEEE80211_ASSOCIATE;
757 printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
758 dev->name, MAC_ARG(ifsta->bssid));
759 if (ieee80211_privacy_mismatch(dev, ifsta)) {
760 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
761 "mixed-cell disabled - abort association\n", dev->name);
762 ifsta->state = IEEE80211_DISABLED;
763 return;
764 }
765
766 ieee80211_send_assoc(dev, ifsta);
767
768 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
769 }
770
771
772 static void ieee80211_associated(struct net_device *dev,
773 struct ieee80211_if_sta *ifsta)
774 {
775 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
776 struct sta_info *sta;
777 int disassoc;
778
779 /* TODO: start monitoring current AP signal quality and number of
780 * missed beacons. Scan other channels every now and then and search
781 * for better APs. */
782 /* TODO: remove expired BSSes */
783
784 ifsta->state = IEEE80211_ASSOCIATED;
785
786 sta = sta_info_get(local, ifsta->bssid);
787 if (!sta) {
788 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
789 dev->name, MAC_ARG(ifsta->bssid));
790 disassoc = 1;
791 } else {
792 disassoc = 0;
793 if (time_after(jiffies,
794 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
795 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
796 printk(KERN_DEBUG "%s: No ProbeResp from "
797 "current AP " MAC_FMT " - assume out of "
798 "range\n",
799 dev->name, MAC_ARG(ifsta->bssid));
800 disassoc = 1;
801 sta_info_free(sta);
802 } else
803 ieee80211_send_probe_req(dev, ifsta->bssid,
804 local->scan_ssid,
805 local->scan_ssid_len);
806 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
807 } else {
808 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
809 if (time_after(jiffies, ifsta->last_probe +
810 IEEE80211_PROBE_INTERVAL)) {
811 ifsta->last_probe = jiffies;
812 ieee80211_send_probe_req(dev, ifsta->bssid,
813 ifsta->ssid,
814 ifsta->ssid_len);
815 }
816 }
817 sta_info_put(sta);
818 }
819 if (disassoc) {
820 union iwreq_data wrqu;
821 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
822 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
823 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
824 mod_timer(&ifsta->timer, jiffies +
825 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
826 } else {
827 mod_timer(&ifsta->timer, jiffies +
828 IEEE80211_MONITORING_INTERVAL);
829 }
830 }
831
832
833 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
834 u8 *ssid, size_t ssid_len)
835 {
836 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
837 struct ieee80211_hw_mode *mode;
838 struct sk_buff *skb;
839 struct ieee80211_mgmt *mgmt;
840 u8 *pos, *supp_rates, *esupp_rates = NULL;
841 int i;
842
843 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
844 if (!skb) {
845 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
846 "request\n", dev->name);
847 return;
848 }
849 skb_reserve(skb, local->hw.extra_tx_headroom);
850
851 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
852 memset(mgmt, 0, 24);
853 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
854 IEEE80211_STYPE_PROBE_REQ);
855 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
856 if (dst) {
857 memcpy(mgmt->da, dst, ETH_ALEN);
858 memcpy(mgmt->bssid, dst, ETH_ALEN);
859 } else {
860 memset(mgmt->da, 0xff, ETH_ALEN);
861 memset(mgmt->bssid, 0xff, ETH_ALEN);
862 }
863 pos = skb_put(skb, 2 + ssid_len);
864 *pos++ = WLAN_EID_SSID;
865 *pos++ = ssid_len;
866 memcpy(pos, ssid, ssid_len);
867
868 supp_rates = skb_put(skb, 2);
869 supp_rates[0] = WLAN_EID_SUPP_RATES;
870 supp_rates[1] = 0;
871 mode = local->oper_hw_mode;
872 for (i = 0; i < mode->num_rates; i++) {
873 struct ieee80211_rate *rate = &mode->rates[i];
874 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
875 continue;
876 if (esupp_rates) {
877 pos = skb_put(skb, 1);
878 esupp_rates[1]++;
879 } else if (supp_rates[1] == 8) {
880 esupp_rates = skb_put(skb, 3);
881 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
882 esupp_rates[1] = 1;
883 pos = &esupp_rates[2];
884 } else {
885 pos = skb_put(skb, 1);
886 supp_rates[1]++;
887 }
888 *pos = rate->rate / 5;
889 }
890
891 ieee80211_sta_tx(dev, skb, 0);
892 }
893
894
895 static int ieee80211_sta_wep_configured(struct net_device *dev)
896 {
897 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
898 if (!sdata || !sdata->default_key ||
899 sdata->default_key->conf.alg != ALG_WEP)
900 return 0;
901 return 1;
902 }
903
904
905 static void ieee80211_auth_completed(struct net_device *dev,
906 struct ieee80211_if_sta *ifsta)
907 {
908 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
909 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
910 ieee80211_associate(dev, ifsta);
911 }
912
913
914 static void ieee80211_auth_challenge(struct net_device *dev,
915 struct ieee80211_if_sta *ifsta,
916 struct ieee80211_mgmt *mgmt,
917 size_t len)
918 {
919 u8 *pos;
920 struct ieee802_11_elems elems;
921
922 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
923 pos = mgmt->u.auth.variable;
924 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
925 == ParseFailed) {
926 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
927 dev->name);
928 return;
929 }
930 if (!elems.challenge) {
931 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
932 "frame\n", dev->name);
933 return;
934 }
935 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
936 elems.challenge_len + 2, 1);
937 }
938
939
940 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
941 struct ieee80211_if_sta *ifsta,
942 struct ieee80211_mgmt *mgmt,
943 size_t len)
944 {
945 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
946 u16 auth_alg, auth_transaction, status_code;
947
948 if (ifsta->state != IEEE80211_AUTHENTICATE &&
949 sdata->type != IEEE80211_IF_TYPE_IBSS) {
950 printk(KERN_DEBUG "%s: authentication frame received from "
951 MAC_FMT ", but not in authenticate state - ignored\n",
952 dev->name, MAC_ARG(mgmt->sa));
953 return;
954 }
955
956 if (len < 24 + 6) {
957 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
958 "received from " MAC_FMT " - ignored\n",
959 dev->name, len, MAC_ARG(mgmt->sa));
960 return;
961 }
962
963 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
964 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
965 printk(KERN_DEBUG "%s: authentication frame received from "
966 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
967 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
968 MAC_ARG(mgmt->bssid));
969 return;
970 }
971
972 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
973 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
974 printk(KERN_DEBUG "%s: authentication frame received from "
975 "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
976 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
977 MAC_ARG(mgmt->bssid));
978 return;
979 }
980
981 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
982 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
983 status_code = le16_to_cpu(mgmt->u.auth.status_code);
984
985 printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
986 "transaction=%d status=%d)\n",
987 dev->name, MAC_ARG(mgmt->sa), auth_alg,
988 auth_transaction, status_code);
989
990 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
991 /* IEEE 802.11 standard does not require authentication in IBSS
992 * networks and most implementations do not seem to use it.
993 * However, try to reply to authentication attempts if someone
994 * has actually implemented this.
995 * TODO: Could implement shared key authentication. */
996 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
997 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
998 "frame (alg=%d transaction=%d)\n",
999 dev->name, auth_alg, auth_transaction);
1000 return;
1001 }
1002 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1003 }
1004
1005 if (auth_alg != ifsta->auth_alg ||
1006 auth_transaction != ifsta->auth_transaction) {
1007 printk(KERN_DEBUG "%s: unexpected authentication frame "
1008 "(alg=%d transaction=%d)\n",
1009 dev->name, auth_alg, auth_transaction);
1010 return;
1011 }
1012
1013 if (status_code != WLAN_STATUS_SUCCESS) {
1014 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1015 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1016 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1017 u8 algs[3];
1018 const int num_algs = ARRAY_SIZE(algs);
1019 int i, pos;
1020 algs[0] = algs[1] = algs[2] = 0xff;
1021 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1022 algs[0] = WLAN_AUTH_OPEN;
1023 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1024 algs[1] = WLAN_AUTH_SHARED_KEY;
1025 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1026 algs[2] = WLAN_AUTH_LEAP;
1027 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1028 pos = 0;
1029 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1030 pos = 1;
1031 else
1032 pos = 2;
1033 for (i = 0; i < num_algs; i++) {
1034 pos++;
1035 if (pos >= num_algs)
1036 pos = 0;
1037 if (algs[pos] == ifsta->auth_alg ||
1038 algs[pos] == 0xff)
1039 continue;
1040 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1041 !ieee80211_sta_wep_configured(dev))
1042 continue;
1043 ifsta->auth_alg = algs[pos];
1044 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1045 "next try\n",
1046 dev->name, ifsta->auth_alg);
1047 break;
1048 }
1049 }
1050 return;
1051 }
1052
1053 switch (ifsta->auth_alg) {
1054 case WLAN_AUTH_OPEN:
1055 case WLAN_AUTH_LEAP:
1056 ieee80211_auth_completed(dev, ifsta);
1057 break;
1058 case WLAN_AUTH_SHARED_KEY:
1059 if (ifsta->auth_transaction == 4)
1060 ieee80211_auth_completed(dev, ifsta);
1061 else
1062 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1063 break;
1064 }
1065 }
1066
1067
1068 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1069 struct ieee80211_if_sta *ifsta,
1070 struct ieee80211_mgmt *mgmt,
1071 size_t len)
1072 {
1073 u16 reason_code;
1074
1075 if (len < 24 + 2) {
1076 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1077 "received from " MAC_FMT " - ignored\n",
1078 dev->name, len, MAC_ARG(mgmt->sa));
1079 return;
1080 }
1081
1082 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1083 printk(KERN_DEBUG "%s: deauthentication frame received from "
1084 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1085 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1086 MAC_ARG(mgmt->bssid));
1087 return;
1088 }
1089
1090 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1091
1092 printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1093 " (reason=%d)\n",
1094 dev->name, MAC_ARG(mgmt->sa), reason_code);
1095
1096 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1097 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1098 }
1099
1100 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1101 ifsta->state == IEEE80211_ASSOCIATE ||
1102 ifsta->state == IEEE80211_ASSOCIATED) {
1103 ifsta->state = IEEE80211_AUTHENTICATE;
1104 mod_timer(&ifsta->timer, jiffies +
1105 IEEE80211_RETRY_AUTH_INTERVAL);
1106 }
1107
1108 ieee80211_set_disassoc(dev, ifsta, 1);
1109 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1110 }
1111
1112
1113 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1114 struct ieee80211_if_sta *ifsta,
1115 struct ieee80211_mgmt *mgmt,
1116 size_t len)
1117 {
1118 u16 reason_code;
1119
1120 if (len < 24 + 2) {
1121 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1122 "received from " MAC_FMT " - ignored\n",
1123 dev->name, len, MAC_ARG(mgmt->sa));
1124 return;
1125 }
1126
1127 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1128 printk(KERN_DEBUG "%s: disassociation frame received from "
1129 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1130 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1131 MAC_ARG(mgmt->bssid));
1132 return;
1133 }
1134
1135 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1136
1137 printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1138 " (reason=%d)\n",
1139 dev->name, MAC_ARG(mgmt->sa), reason_code);
1140
1141 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1142 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1143
1144 if (ifsta->state == IEEE80211_ASSOCIATED) {
1145 ifsta->state = IEEE80211_ASSOCIATE;
1146 mod_timer(&ifsta->timer, jiffies +
1147 IEEE80211_RETRY_AUTH_INTERVAL);
1148 }
1149
1150 ieee80211_set_disassoc(dev, ifsta, 0);
1151 }
1152
1153
1154 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1155 struct ieee80211_if_sta *ifsta,
1156 struct ieee80211_mgmt *mgmt,
1157 size_t len,
1158 int reassoc)
1159 {
1160 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1161 struct ieee80211_hw_mode *mode;
1162 struct sta_info *sta;
1163 u32 rates;
1164 u16 capab_info, status_code, aid;
1165 struct ieee802_11_elems elems;
1166 u8 *pos;
1167 int i, j;
1168
1169 /* AssocResp and ReassocResp have identical structure, so process both
1170 * of them in this function. */
1171
1172 if (ifsta->state != IEEE80211_ASSOCIATE) {
1173 printk(KERN_DEBUG "%s: association frame received from "
1174 MAC_FMT ", but not in associate state - ignored\n",
1175 dev->name, MAC_ARG(mgmt->sa));
1176 return;
1177 }
1178
1179 if (len < 24 + 6) {
1180 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1181 "received from " MAC_FMT " - ignored\n",
1182 dev->name, len, MAC_ARG(mgmt->sa));
1183 return;
1184 }
1185
1186 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1187 printk(KERN_DEBUG "%s: association frame received from "
1188 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1189 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1190 MAC_ARG(mgmt->bssid));
1191 return;
1192 }
1193
1194 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1195 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1196 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1197 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1198 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1199 "set\n", dev->name, aid);
1200 aid &= ~(BIT(15) | BIT(14));
1201
1202 printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1203 "status=%d aid=%d)\n",
1204 dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1205 capab_info, status_code, aid);
1206
1207 if (status_code != WLAN_STATUS_SUCCESS) {
1208 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1209 dev->name, status_code);
1210 /* if this was a reassociation, ensure we try a "full"
1211 * association next time. This works around some broken APs
1212 * which do not correctly reject reassociation requests. */
1213 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1214 return;
1215 }
1216
1217 pos = mgmt->u.assoc_resp.variable;
1218 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1219 == ParseFailed) {
1220 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1221 dev->name);
1222 return;
1223 }
1224
1225 if (!elems.supp_rates) {
1226 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1227 dev->name);
1228 return;
1229 }
1230
1231 /* it probably doesn't, but if the frame includes an ERP value then
1232 * update our stored copy */
1233 if (elems.erp_info && elems.erp_info_len >= 1) {
1234 struct ieee80211_sta_bss *bss
1235 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1236 if (bss) {
1237 bss->erp_value = elems.erp_info[0];
1238 bss->has_erp_value = 1;
1239 ieee80211_rx_bss_put(dev, bss);
1240 }
1241 }
1242
1243 printk(KERN_DEBUG "%s: associated\n", dev->name);
1244 ifsta->aid = aid;
1245 ifsta->ap_capab = capab_info;
1246
1247 kfree(ifsta->assocresp_ies);
1248 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1249 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1250 if (ifsta->assocresp_ies)
1251 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1252
1253 ieee80211_set_associated(dev, ifsta, 1);
1254
1255 /* Add STA entry for the AP */
1256 sta = sta_info_get(local, ifsta->bssid);
1257 if (!sta) {
1258 struct ieee80211_sta_bss *bss;
1259 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1260 if (!sta) {
1261 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1262 " AP\n", dev->name);
1263 return;
1264 }
1265 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1266 if (bss) {
1267 sta->last_rssi = bss->rssi;
1268 sta->last_signal = bss->signal;
1269 sta->last_noise = bss->noise;
1270 ieee80211_rx_bss_put(dev, bss);
1271 }
1272 }
1273
1274 sta->dev = dev;
1275 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1276
1277 rates = 0;
1278 mode = local->oper_hw_mode;
1279 for (i = 0; i < elems.supp_rates_len; i++) {
1280 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1281 for (j = 0; j < mode->num_rates; j++)
1282 if (mode->rates[j].rate == rate)
1283 rates |= BIT(j);
1284 }
1285 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1286 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1287 for (j = 0; j < mode->num_rates; j++)
1288 if (mode->rates[j].rate == rate)
1289 rates |= BIT(j);
1290 }
1291 sta->supp_rates = rates;
1292
1293 rate_control_rate_init(sta, local);
1294
1295 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1296 sta->flags |= WLAN_STA_WME;
1297 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1298 elems.wmm_param_len);
1299 }
1300
1301
1302 sta_info_put(sta);
1303
1304 ieee80211_associated(dev, ifsta);
1305 }
1306
1307
1308 /* Caller must hold local->sta_bss_lock */
1309 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1310 struct ieee80211_sta_bss *bss)
1311 {
1312 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1313 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1314 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1315 }
1316
1317
1318 /* Caller must hold local->sta_bss_lock */
1319 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1320 struct ieee80211_sta_bss *bss)
1321 {
1322 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1323 struct ieee80211_sta_bss *b, *prev = NULL;
1324 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1325 while (b) {
1326 if (b == bss) {
1327 if (!prev)
1328 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1329 bss->hnext;
1330 else
1331 prev->hnext = bss->hnext;
1332 break;
1333 }
1334 prev = b;
1335 b = b->hnext;
1336 }
1337 }
1338
1339
1340 static struct ieee80211_sta_bss *
1341 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1342 {
1343 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1344 struct ieee80211_sta_bss *bss;
1345
1346 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1347 if (!bss)
1348 return NULL;
1349 atomic_inc(&bss->users);
1350 atomic_inc(&bss->users);
1351 memcpy(bss->bssid, bssid, ETH_ALEN);
1352
1353 spin_lock_bh(&local->sta_bss_lock);
1354 /* TODO: order by RSSI? */
1355 list_add_tail(&bss->list, &local->sta_bss_list);
1356 __ieee80211_rx_bss_hash_add(dev, bss);
1357 spin_unlock_bh(&local->sta_bss_lock);
1358 return bss;
1359 }
1360
1361
1362 static struct ieee80211_sta_bss *
1363 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1364 {
1365 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1366 struct ieee80211_sta_bss *bss;
1367
1368 spin_lock_bh(&local->sta_bss_lock);
1369 bss = local->sta_bss_hash[STA_HASH(bssid)];
1370 while (bss) {
1371 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1372 atomic_inc(&bss->users);
1373 break;
1374 }
1375 bss = bss->hnext;
1376 }
1377 spin_unlock_bh(&local->sta_bss_lock);
1378 return bss;
1379 }
1380
1381
1382 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1383 {
1384 kfree(bss->wpa_ie);
1385 kfree(bss->rsn_ie);
1386 kfree(bss->wmm_ie);
1387 kfree(bss);
1388 }
1389
1390
1391 static void ieee80211_rx_bss_put(struct net_device *dev,
1392 struct ieee80211_sta_bss *bss)
1393 {
1394 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1395 if (!atomic_dec_and_test(&bss->users))
1396 return;
1397
1398 spin_lock_bh(&local->sta_bss_lock);
1399 __ieee80211_rx_bss_hash_del(dev, bss);
1400 list_del(&bss->list);
1401 spin_unlock_bh(&local->sta_bss_lock);
1402 ieee80211_rx_bss_free(bss);
1403 }
1404
1405
1406 void ieee80211_rx_bss_list_init(struct net_device *dev)
1407 {
1408 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1409 spin_lock_init(&local->sta_bss_lock);
1410 INIT_LIST_HEAD(&local->sta_bss_list);
1411 }
1412
1413
1414 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1415 {
1416 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1417 struct ieee80211_sta_bss *bss, *tmp;
1418
1419 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1420 ieee80211_rx_bss_put(dev, bss);
1421 }
1422
1423
1424 static void ieee80211_rx_bss_info(struct net_device *dev,
1425 struct ieee80211_mgmt *mgmt,
1426 size_t len,
1427 struct ieee80211_rx_status *rx_status,
1428 int beacon)
1429 {
1430 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1431 struct ieee802_11_elems elems;
1432 size_t baselen;
1433 int channel, invalid = 0, clen;
1434 struct ieee80211_sta_bss *bss;
1435 struct sta_info *sta;
1436 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1437 u64 timestamp;
1438
1439 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1440 return; /* ignore ProbeResp to foreign address */
1441
1442 #if 0
1443 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1444 dev->name, beacon ? "Beacon" : "Probe Response",
1445 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1446 #endif
1447
1448 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1449 if (baselen > len)
1450 return;
1451
1452 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1453
1454 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1455 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1456 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1457 static unsigned long last_tsf_debug = 0;
1458 u64 tsf;
1459 if (local->ops->get_tsf)
1460 tsf = local->ops->get_tsf(local_to_hw(local));
1461 else
1462 tsf = -1LLU;
1463 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1464 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1465 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1466 "@%lu\n",
1467 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1468 (unsigned long long)tsf,
1469 (unsigned long long)timestamp,
1470 (unsigned long long)(tsf - timestamp),
1471 jiffies);
1472 last_tsf_debug = jiffies;
1473 }
1474 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1475 }
1476
1477 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1478 &elems) == ParseFailed)
1479 invalid = 1;
1480
1481 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1482 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1483 (sta = sta_info_get(local, mgmt->sa))) {
1484 struct ieee80211_hw_mode *mode;
1485 struct ieee80211_rate *rates;
1486 size_t num_rates;
1487 u32 supp_rates, prev_rates;
1488 int i, j;
1489
1490 mode = local->sta_scanning ?
1491 local->scan_hw_mode : local->oper_hw_mode;
1492 rates = mode->rates;
1493 num_rates = mode->num_rates;
1494
1495 supp_rates = 0;
1496 for (i = 0; i < elems.supp_rates_len +
1497 elems.ext_supp_rates_len; i++) {
1498 u8 rate = 0;
1499 int own_rate;
1500 if (i < elems.supp_rates_len)
1501 rate = elems.supp_rates[i];
1502 else if (elems.ext_supp_rates)
1503 rate = elems.ext_supp_rates
1504 [i - elems.supp_rates_len];
1505 own_rate = 5 * (rate & 0x7f);
1506 for (j = 0; j < num_rates; j++)
1507 if (rates[j].rate == own_rate)
1508 supp_rates |= BIT(j);
1509 }
1510
1511 prev_rates = sta->supp_rates;
1512 sta->supp_rates &= supp_rates;
1513 if (sta->supp_rates == 0) {
1514 /* No matching rates - this should not really happen.
1515 * Make sure that at least one rate is marked
1516 * supported to avoid issues with TX rate ctrl. */
1517 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1518 }
1519 if (sta->supp_rates != prev_rates) {
1520 printk(KERN_DEBUG "%s: updated supp_rates set for "
1521 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1522 "0x%x)\n",
1523 dev->name, MAC_ARG(sta->addr), prev_rates,
1524 supp_rates, sta->supp_rates);
1525 }
1526 sta_info_put(sta);
1527 }
1528
1529 if (!elems.ssid)
1530 return;
1531
1532 if (elems.ds_params && elems.ds_params_len == 1)
1533 channel = elems.ds_params[0];
1534 else
1535 channel = rx_status->channel;
1536
1537 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1538 if (!bss) {
1539 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1540 if (!bss)
1541 return;
1542 } else {
1543 #if 0
1544 /* TODO: order by RSSI? */
1545 spin_lock_bh(&local->sta_bss_lock);
1546 list_move_tail(&bss->list, &local->sta_bss_list);
1547 spin_unlock_bh(&local->sta_bss_lock);
1548 #endif
1549 }
1550
1551 if (bss->probe_resp && beacon) {
1552 /* Do not allow beacon to override data from Probe Response. */
1553 ieee80211_rx_bss_put(dev, bss);
1554 return;
1555 }
1556
1557 /* save the ERP value so that it is available at association time */
1558 if (elems.erp_info && elems.erp_info_len >= 1) {
1559 bss->erp_value = elems.erp_info[0];
1560 bss->has_erp_value = 1;
1561 }
1562
1563 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1564 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1565 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1566 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1567 bss->ssid_len = elems.ssid_len;
1568 }
1569
1570 bss->supp_rates_len = 0;
1571 if (elems.supp_rates) {
1572 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1573 if (clen > elems.supp_rates_len)
1574 clen = elems.supp_rates_len;
1575 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1576 clen);
1577 bss->supp_rates_len += clen;
1578 }
1579 if (elems.ext_supp_rates) {
1580 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1581 if (clen > elems.ext_supp_rates_len)
1582 clen = elems.ext_supp_rates_len;
1583 memcpy(&bss->supp_rates[bss->supp_rates_len],
1584 elems.ext_supp_rates, clen);
1585 bss->supp_rates_len += clen;
1586 }
1587
1588 if (elems.wpa &&
1589 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1590 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1591 kfree(bss->wpa_ie);
1592 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1593 if (bss->wpa_ie) {
1594 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1595 bss->wpa_ie_len = elems.wpa_len + 2;
1596 } else
1597 bss->wpa_ie_len = 0;
1598 } else if (!elems.wpa && bss->wpa_ie) {
1599 kfree(bss->wpa_ie);
1600 bss->wpa_ie = NULL;
1601 bss->wpa_ie_len = 0;
1602 }
1603
1604 if (elems.rsn &&
1605 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1606 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1607 kfree(bss->rsn_ie);
1608 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1609 if (bss->rsn_ie) {
1610 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1611 bss->rsn_ie_len = elems.rsn_len + 2;
1612 } else
1613 bss->rsn_ie_len = 0;
1614 } else if (!elems.rsn && bss->rsn_ie) {
1615 kfree(bss->rsn_ie);
1616 bss->rsn_ie = NULL;
1617 bss->rsn_ie_len = 0;
1618 }
1619
1620 if (elems.wmm_param &&
1621 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1622 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1623 kfree(bss->wmm_ie);
1624 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1625 if (bss->wmm_ie) {
1626 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1627 elems.wmm_param_len + 2);
1628 bss->wmm_ie_len = elems.wmm_param_len + 2;
1629 } else
1630 bss->wmm_ie_len = 0;
1631 } else if (!elems.wmm_param && bss->wmm_ie) {
1632 kfree(bss->wmm_ie);
1633 bss->wmm_ie = NULL;
1634 bss->wmm_ie_len = 0;
1635 }
1636
1637
1638 bss->hw_mode = rx_status->phymode;
1639 bss->channel = channel;
1640 bss->freq = rx_status->freq;
1641 if (channel != rx_status->channel &&
1642 (bss->hw_mode == MODE_IEEE80211G ||
1643 bss->hw_mode == MODE_IEEE80211B) &&
1644 channel >= 1 && channel <= 14) {
1645 static const int freq_list[] = {
1646 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1647 2447, 2452, 2457, 2462, 2467, 2472, 2484
1648 };
1649 /* IEEE 802.11g/b mode can receive packets from neighboring
1650 * channels, so map the channel into frequency. */
1651 bss->freq = freq_list[channel - 1];
1652 }
1653 bss->timestamp = timestamp;
1654 bss->last_update = jiffies;
1655 bss->rssi = rx_status->ssi;
1656 bss->signal = rx_status->signal;
1657 bss->noise = rx_status->noise;
1658 if (!beacon)
1659 bss->probe_resp++;
1660 ieee80211_rx_bss_put(dev, bss);
1661 }
1662
1663
1664 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1665 struct ieee80211_mgmt *mgmt,
1666 size_t len,
1667 struct ieee80211_rx_status *rx_status)
1668 {
1669 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1670 }
1671
1672
1673 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1674 struct ieee80211_mgmt *mgmt,
1675 size_t len,
1676 struct ieee80211_rx_status *rx_status)
1677 {
1678 struct ieee80211_sub_if_data *sdata;
1679 struct ieee80211_if_sta *ifsta;
1680 size_t baselen;
1681 struct ieee802_11_elems elems;
1682
1683 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1684
1685 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1686 if (sdata->type != IEEE80211_IF_TYPE_STA)
1687 return;
1688 ifsta = &sdata->u.sta;
1689
1690 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1691 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1692 return;
1693
1694 /* Process beacon from the current BSS */
1695 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1696 if (baselen > len)
1697 return;
1698
1699 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1700 &elems) == ParseFailed)
1701 return;
1702
1703 if (elems.erp_info && elems.erp_info_len >= 1)
1704 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1705
1706 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1707 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1708 elems.wmm_param_len);
1709 }
1710 }
1711
1712
1713 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1714 struct ieee80211_if_sta *ifsta,
1715 struct ieee80211_mgmt *mgmt,
1716 size_t len,
1717 struct ieee80211_rx_status *rx_status)
1718 {
1719 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1720 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1721 int tx_last_beacon;
1722 struct sk_buff *skb;
1723 struct ieee80211_mgmt *resp;
1724 u8 *pos, *end;
1725
1726 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1727 ifsta->state != IEEE80211_IBSS_JOINED ||
1728 len < 24 + 2 || !ifsta->probe_resp)
1729 return;
1730
1731 if (local->ops->tx_last_beacon)
1732 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1733 else
1734 tx_last_beacon = 1;
1735
1736 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1737 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1738 MAC_FMT " (tx_last_beacon=%d)\n",
1739 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1740 MAC_ARG(mgmt->bssid), tx_last_beacon);
1741 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1742
1743 if (!tx_last_beacon)
1744 return;
1745
1746 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1747 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1748 return;
1749
1750 end = ((u8 *) mgmt) + len;
1751 pos = mgmt->u.probe_req.variable;
1752 if (pos[0] != WLAN_EID_SSID ||
1753 pos + 2 + pos[1] > end) {
1754 if (net_ratelimit()) {
1755 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1756 "from " MAC_FMT "\n",
1757 dev->name, MAC_ARG(mgmt->sa));
1758 }
1759 return;
1760 }
1761 if (pos[1] != 0 &&
1762 (pos[1] != ifsta->ssid_len ||
1763 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1764 /* Ignore ProbeReq for foreign SSID */
1765 return;
1766 }
1767
1768 /* Reply with ProbeResp */
1769 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1770 if (!skb)
1771 return;
1772
1773 resp = (struct ieee80211_mgmt *) skb->data;
1774 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1775 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1776 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1777 dev->name, MAC_ARG(resp->da));
1778 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1779 ieee80211_sta_tx(dev, skb, 0);
1780 }
1781
1782
1783 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1784 struct ieee80211_rx_status *rx_status)
1785 {
1786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1787 struct ieee80211_sub_if_data *sdata;
1788 struct ieee80211_if_sta *ifsta;
1789 struct ieee80211_mgmt *mgmt;
1790 u16 fc;
1791
1792 if (skb->len < 24)
1793 goto fail;
1794
1795 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1796 ifsta = &sdata->u.sta;
1797
1798 mgmt = (struct ieee80211_mgmt *) skb->data;
1799 fc = le16_to_cpu(mgmt->frame_control);
1800
1801 switch (fc & IEEE80211_FCTL_STYPE) {
1802 case IEEE80211_STYPE_PROBE_REQ:
1803 case IEEE80211_STYPE_PROBE_RESP:
1804 case IEEE80211_STYPE_BEACON:
1805 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1806 case IEEE80211_STYPE_AUTH:
1807 case IEEE80211_STYPE_ASSOC_RESP:
1808 case IEEE80211_STYPE_REASSOC_RESP:
1809 case IEEE80211_STYPE_DEAUTH:
1810 case IEEE80211_STYPE_DISASSOC:
1811 skb_queue_tail(&ifsta->skb_queue, skb);
1812 queue_work(local->hw.workqueue, &ifsta->work);
1813 return;
1814 default:
1815 printk(KERN_DEBUG "%s: received unknown management frame - "
1816 "stype=%d\n", dev->name,
1817 (fc & IEEE80211_FCTL_STYPE) >> 4);
1818 break;
1819 }
1820
1821 fail:
1822 kfree_skb(skb);
1823 }
1824
1825
1826 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1827 struct sk_buff *skb)
1828 {
1829 struct ieee80211_rx_status *rx_status;
1830 struct ieee80211_sub_if_data *sdata;
1831 struct ieee80211_if_sta *ifsta;
1832 struct ieee80211_mgmt *mgmt;
1833 u16 fc;
1834
1835 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1836 ifsta = &sdata->u.sta;
1837
1838 rx_status = (struct ieee80211_rx_status *) skb->cb;
1839 mgmt = (struct ieee80211_mgmt *) skb->data;
1840 fc = le16_to_cpu(mgmt->frame_control);
1841
1842 switch (fc & IEEE80211_FCTL_STYPE) {
1843 case IEEE80211_STYPE_PROBE_REQ:
1844 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1845 rx_status);
1846 break;
1847 case IEEE80211_STYPE_PROBE_RESP:
1848 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1849 break;
1850 case IEEE80211_STYPE_BEACON:
1851 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1852 break;
1853 case IEEE80211_STYPE_AUTH:
1854 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1855 break;
1856 case IEEE80211_STYPE_ASSOC_RESP:
1857 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1858 break;
1859 case IEEE80211_STYPE_REASSOC_RESP:
1860 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1861 break;
1862 case IEEE80211_STYPE_DEAUTH:
1863 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1864 break;
1865 case IEEE80211_STYPE_DISASSOC:
1866 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1867 break;
1868 }
1869
1870 kfree_skb(skb);
1871 }
1872
1873
1874 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1875 struct ieee80211_rx_status *rx_status)
1876 {
1877 struct ieee80211_mgmt *mgmt;
1878 u16 fc;
1879
1880 if (skb->len < 24) {
1881 dev_kfree_skb(skb);
1882 return;
1883 }
1884
1885 mgmt = (struct ieee80211_mgmt *) skb->data;
1886 fc = le16_to_cpu(mgmt->frame_control);
1887
1888 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1889 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1890 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1891 skb->len, rx_status);
1892 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1893 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1894 rx_status);
1895 }
1896 }
1897
1898 dev_kfree_skb(skb);
1899 }
1900
1901
1902 static int ieee80211_sta_active_ibss(struct net_device *dev)
1903 {
1904 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1905 int active = 0;
1906 struct sta_info *sta;
1907
1908 read_lock_bh(&local->sta_lock);
1909 list_for_each_entry(sta, &local->sta_list, list) {
1910 if (sta->dev == dev &&
1911 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1912 jiffies)) {
1913 active++;
1914 break;
1915 }
1916 }
1917 read_unlock_bh(&local->sta_lock);
1918
1919 return active;
1920 }
1921
1922
1923 static void ieee80211_sta_expire(struct net_device *dev)
1924 {
1925 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1926 struct sta_info *sta, *tmp;
1927 LIST_HEAD(tmp_list);
1928
1929 write_lock_bh(&local->sta_lock);
1930 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1931 if (time_after(jiffies, sta->last_rx +
1932 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1933 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1934 "\n", dev->name, MAC_ARG(sta->addr));
1935 __sta_info_get(sta);
1936 sta_info_remove(sta);
1937 list_add(&sta->list, &tmp_list);
1938 }
1939 write_unlock_bh(&local->sta_lock);
1940
1941 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1942 sta_info_free(sta);
1943 sta_info_put(sta);
1944 }
1945 }
1946
1947
1948 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1949 struct ieee80211_if_sta *ifsta)
1950 {
1951 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1952
1953 ieee80211_sta_expire(dev);
1954 if (ieee80211_sta_active_ibss(dev))
1955 return;
1956
1957 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1958 "IBSS networks with same SSID (merge)\n", dev->name);
1959 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1960 }
1961
1962
1963 void ieee80211_sta_timer(unsigned long data)
1964 {
1965 struct ieee80211_sub_if_data *sdata =
1966 (struct ieee80211_sub_if_data *) data;
1967 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1968 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1969
1970 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1971 queue_work(local->hw.workqueue, &ifsta->work);
1972 }
1973
1974
1975 void ieee80211_sta_work(struct work_struct *work)
1976 {
1977 struct ieee80211_sub_if_data *sdata =
1978 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1979 struct net_device *dev = sdata->dev;
1980 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1981 struct ieee80211_if_sta *ifsta;
1982 struct sk_buff *skb;
1983
1984 if (!netif_running(dev))
1985 return;
1986
1987 if (local->sta_scanning)
1988 return;
1989
1990 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1991 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1992 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1993 "(type=%d)\n", dev->name, sdata->type);
1994 return;
1995 }
1996 ifsta = &sdata->u.sta;
1997
1998 while ((skb = skb_dequeue(&ifsta->skb_queue)))
1999 ieee80211_sta_rx_queued_mgmt(dev, skb);
2000
2001 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2002 ifsta->state != IEEE80211_ASSOCIATE &&
2003 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2004 ieee80211_sta_start_scan(dev, NULL, 0);
2005 return;
2006 }
2007
2008 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2009 if (ieee80211_sta_config_auth(dev, ifsta))
2010 return;
2011 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2012 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2013 return;
2014
2015 switch (ifsta->state) {
2016 case IEEE80211_DISABLED:
2017 break;
2018 case IEEE80211_AUTHENTICATE:
2019 ieee80211_authenticate(dev, ifsta);
2020 break;
2021 case IEEE80211_ASSOCIATE:
2022 ieee80211_associate(dev, ifsta);
2023 break;
2024 case IEEE80211_ASSOCIATED:
2025 ieee80211_associated(dev, ifsta);
2026 break;
2027 case IEEE80211_IBSS_SEARCH:
2028 ieee80211_sta_find_ibss(dev, ifsta);
2029 break;
2030 case IEEE80211_IBSS_JOINED:
2031 ieee80211_sta_merge_ibss(dev, ifsta);
2032 break;
2033 default:
2034 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2035 ifsta->state);
2036 break;
2037 }
2038
2039 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2040 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2041 "mixed-cell disabled - disassociate\n", dev->name);
2042
2043 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2044 ieee80211_set_disassoc(dev, ifsta, 0);
2045 }
2046 }
2047
2048
2049 static void ieee80211_sta_reset_auth(struct net_device *dev,
2050 struct ieee80211_if_sta *ifsta)
2051 {
2052 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2053
2054 if (local->ops->reset_tsf) {
2055 /* Reset own TSF to allow time synchronization work. */
2056 local->ops->reset_tsf(local_to_hw(local));
2057 }
2058
2059 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2060
2061
2062 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2063 ifsta->auth_alg = WLAN_AUTH_OPEN;
2064 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2065 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2066 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2067 ifsta->auth_alg = WLAN_AUTH_LEAP;
2068 else
2069 ifsta->auth_alg = WLAN_AUTH_OPEN;
2070 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2071 ifsta->auth_alg);
2072 ifsta->auth_transaction = -1;
2073 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2074 ifsta->auth_tries = ifsta->assoc_tries = 0;
2075 netif_carrier_off(dev);
2076 }
2077
2078
2079 void ieee80211_sta_req_auth(struct net_device *dev,
2080 struct ieee80211_if_sta *ifsta)
2081 {
2082 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2083 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2084
2085 if (sdata->type != IEEE80211_IF_TYPE_STA)
2086 return;
2087
2088 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2089 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2090 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2091 IEEE80211_STA_AUTO_SSID_SEL))) {
2092 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2093 queue_work(local->hw.workqueue, &ifsta->work);
2094 }
2095 }
2096
2097 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2098 const char *ssid, int ssid_len)
2099 {
2100 int tmp, hidden_ssid;
2101
2102 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2103 return 1;
2104
2105 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2106 return 0;
2107
2108 hidden_ssid = 1;
2109 tmp = ssid_len;
2110 while (tmp--) {
2111 if (ssid[tmp] != '\0') {
2112 hidden_ssid = 0;
2113 break;
2114 }
2115 }
2116
2117 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2118 return 1;
2119
2120 if (ssid_len == 1 && ssid[0] == ' ')
2121 return 1;
2122
2123 return 0;
2124 }
2125
2126 static int ieee80211_sta_config_auth(struct net_device *dev,
2127 struct ieee80211_if_sta *ifsta)
2128 {
2129 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2130 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2131 struct ieee80211_sta_bss *bss, *selected = NULL;
2132 int top_rssi = 0, freq;
2133
2134 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2135 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2136 ifsta->state = IEEE80211_AUTHENTICATE;
2137 ieee80211_sta_reset_auth(dev, ifsta);
2138 return 0;
2139 }
2140
2141 spin_lock_bh(&local->sta_bss_lock);
2142 freq = local->oper_channel->freq;
2143 list_for_each_entry(bss, &local->sta_bss_list, list) {
2144 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2145 continue;
2146
2147 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2148 !!sdata->default_key)
2149 continue;
2150
2151 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2152 bss->freq != freq)
2153 continue;
2154
2155 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2156 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2157 continue;
2158
2159 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2160 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2161 continue;
2162
2163 if (!selected || top_rssi < bss->rssi) {
2164 selected = bss;
2165 top_rssi = bss->rssi;
2166 }
2167 }
2168 if (selected)
2169 atomic_inc(&selected->users);
2170 spin_unlock_bh(&local->sta_bss_lock);
2171
2172 if (selected) {
2173 ieee80211_set_channel(local, -1, selected->freq);
2174 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2175 ieee80211_sta_set_ssid(dev, selected->ssid,
2176 selected->ssid_len);
2177 ieee80211_sta_set_bssid(dev, selected->bssid);
2178 ieee80211_rx_bss_put(dev, selected);
2179 ifsta->state = IEEE80211_AUTHENTICATE;
2180 ieee80211_sta_reset_auth(dev, ifsta);
2181 return 0;
2182 } else {
2183 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2184 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2185 ieee80211_sta_start_scan(dev, NULL, 0);
2186 else
2187 ieee80211_sta_start_scan(dev, ifsta->ssid,
2188 ifsta->ssid_len);
2189 ifsta->state = IEEE80211_AUTHENTICATE;
2190 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2191 } else
2192 ifsta->state = IEEE80211_DISABLED;
2193 }
2194 return -1;
2195 }
2196
2197 static int ieee80211_sta_join_ibss(struct net_device *dev,
2198 struct ieee80211_if_sta *ifsta,
2199 struct ieee80211_sta_bss *bss)
2200 {
2201 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2202 int res, rates, i, j;
2203 struct sk_buff *skb;
2204 struct ieee80211_mgmt *mgmt;
2205 struct ieee80211_tx_control control;
2206 struct ieee80211_rate *rate;
2207 struct ieee80211_hw_mode *mode;
2208 struct rate_control_extra extra;
2209 u8 *pos;
2210 struct ieee80211_sub_if_data *sdata;
2211
2212 /* Remove possible STA entries from other IBSS networks. */
2213 sta_info_flush(local, NULL);
2214
2215 if (local->ops->reset_tsf) {
2216 /* Reset own TSF to allow time synchronization work. */
2217 local->ops->reset_tsf(local_to_hw(local));
2218 }
2219 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2220 res = ieee80211_if_config(dev);
2221 if (res)
2222 return res;
2223
2224 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2225
2226 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2227 sdata->drop_unencrypted = bss->capability &
2228 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2229
2230 res = ieee80211_set_channel(local, -1, bss->freq);
2231
2232 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2233 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2234 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2235 local->hw.conf.freq);
2236 return -1;
2237 }
2238
2239 /* Set beacon template based on scan results */
2240 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2241 do {
2242 if (!skb)
2243 break;
2244
2245 skb_reserve(skb, local->hw.extra_tx_headroom);
2246
2247 mgmt = (struct ieee80211_mgmt *)
2248 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2249 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2250 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2251 IEEE80211_STYPE_BEACON);
2252 memset(mgmt->da, 0xff, ETH_ALEN);
2253 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2254 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2255 mgmt->u.beacon.beacon_int =
2256 cpu_to_le16(local->hw.conf.beacon_int);
2257 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2258
2259 pos = skb_put(skb, 2 + ifsta->ssid_len);
2260 *pos++ = WLAN_EID_SSID;
2261 *pos++ = ifsta->ssid_len;
2262 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2263
2264 rates = bss->supp_rates_len;
2265 if (rates > 8)
2266 rates = 8;
2267 pos = skb_put(skb, 2 + rates);
2268 *pos++ = WLAN_EID_SUPP_RATES;
2269 *pos++ = rates;
2270 memcpy(pos, bss->supp_rates, rates);
2271
2272 pos = skb_put(skb, 2 + 1);
2273 *pos++ = WLAN_EID_DS_PARAMS;
2274 *pos++ = 1;
2275 *pos++ = bss->channel;
2276
2277 pos = skb_put(skb, 2 + 2);
2278 *pos++ = WLAN_EID_IBSS_PARAMS;
2279 *pos++ = 2;
2280 /* FIX: set ATIM window based on scan results */
2281 *pos++ = 0;
2282 *pos++ = 0;
2283
2284 if (bss->supp_rates_len > 8) {
2285 rates = bss->supp_rates_len - 8;
2286 pos = skb_put(skb, 2 + rates);
2287 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2288 *pos++ = rates;
2289 memcpy(pos, &bss->supp_rates[8], rates);
2290 }
2291
2292 memset(&control, 0, sizeof(control));
2293 memset(&extra, 0, sizeof(extra));
2294 extra.mode = local->oper_hw_mode;
2295 rate = rate_control_get_rate(local, dev, skb, &extra);
2296 if (!rate) {
2297 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2298 "for IBSS beacon\n", dev->name);
2299 break;
2300 }
2301 control.tx_rate =
2302 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
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 for (j = 0; j < mode->num_rates; j++)
2335 if (mode->rates[j].rate == bitrate)
2336 rates |= BIT(j);
2337 }
2338 ifsta->supp_rates_bits = rates;
2339 } while (0);
2340
2341 if (skb) {
2342 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2343 "template\n", dev->name);
2344 dev_kfree_skb(skb);
2345 }
2346
2347 ifsta->state = IEEE80211_IBSS_JOINED;
2348 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2349
2350 ieee80211_rx_bss_put(dev, bss);
2351
2352 return res;
2353 }
2354
2355
2356 static int ieee80211_sta_create_ibss(struct net_device *dev,
2357 struct ieee80211_if_sta *ifsta)
2358 {
2359 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2360 struct ieee80211_sta_bss *bss;
2361 struct ieee80211_sub_if_data *sdata;
2362 struct ieee80211_hw_mode *mode;
2363 u8 bssid[ETH_ALEN], *pos;
2364 int i;
2365
2366 #if 0
2367 /* Easier testing, use fixed BSSID. */
2368 memset(bssid, 0xfe, ETH_ALEN);
2369 #else
2370 /* Generate random, not broadcast, locally administered BSSID. Mix in
2371 * own MAC address to make sure that devices that do not have proper
2372 * random number generator get different BSSID. */
2373 get_random_bytes(bssid, ETH_ALEN);
2374 for (i = 0; i < ETH_ALEN; i++)
2375 bssid[i] ^= dev->dev_addr[i];
2376 bssid[0] &= ~0x01;
2377 bssid[0] |= 0x02;
2378 #endif
2379
2380 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2381 dev->name, MAC_ARG(bssid));
2382
2383 bss = ieee80211_rx_bss_add(dev, bssid);
2384 if (!bss)
2385 return -ENOMEM;
2386
2387 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2388 mode = local->oper_hw_mode;
2389
2390 if (local->hw.conf.beacon_int == 0)
2391 local->hw.conf.beacon_int = 100;
2392 bss->beacon_int = local->hw.conf.beacon_int;
2393 bss->hw_mode = local->hw.conf.phymode;
2394 bss->channel = local->hw.conf.channel;
2395 bss->freq = local->hw.conf.freq;
2396 bss->last_update = jiffies;
2397 bss->capability = WLAN_CAPABILITY_IBSS;
2398 if (sdata->default_key) {
2399 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2400 } else
2401 sdata->drop_unencrypted = 0;
2402 bss->supp_rates_len = mode->num_rates;
2403 pos = bss->supp_rates;
2404 for (i = 0; i < mode->num_rates; i++) {
2405 int rate = mode->rates[i].rate;
2406 *pos++ = (u8) (rate / 5);
2407 }
2408
2409 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2410 }
2411
2412
2413 static int ieee80211_sta_find_ibss(struct net_device *dev,
2414 struct ieee80211_if_sta *ifsta)
2415 {
2416 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2417 struct ieee80211_sta_bss *bss;
2418 int found = 0;
2419 u8 bssid[ETH_ALEN];
2420 int active_ibss;
2421
2422 if (ifsta->ssid_len == 0)
2423 return -EINVAL;
2424
2425 active_ibss = ieee80211_sta_active_ibss(dev);
2426 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2427 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2428 dev->name, active_ibss);
2429 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2430 spin_lock_bh(&local->sta_bss_lock);
2431 list_for_each_entry(bss, &local->sta_bss_list, list) {
2432 if (ifsta->ssid_len != bss->ssid_len ||
2433 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2434 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2435 continue;
2436 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2437 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2438 MAC_ARG(bss->bssid));
2439 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2440 memcpy(bssid, bss->bssid, ETH_ALEN);
2441 found = 1;
2442 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2443 break;
2444 }
2445 spin_unlock_bh(&local->sta_bss_lock);
2446
2447 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2448 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2449 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2450 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2451 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2452 (bss = ieee80211_rx_bss_get(dev, bssid))) {
2453 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2454 " based on configured SSID\n",
2455 dev->name, MAC_ARG(bssid));
2456 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2457 }
2458 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2459 printk(KERN_DEBUG " did not try to join ibss\n");
2460 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2461
2462 /* Selected IBSS not found in current scan results - try to scan */
2463 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2464 !ieee80211_sta_active_ibss(dev)) {
2465 mod_timer(&ifsta->timer, jiffies +
2466 IEEE80211_IBSS_MERGE_INTERVAL);
2467 } else if (time_after(jiffies, local->last_scan_completed +
2468 IEEE80211_SCAN_INTERVAL)) {
2469 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2470 "join\n", dev->name);
2471 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2472 ifsta->ssid_len);
2473 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2474 int interval = IEEE80211_SCAN_INTERVAL;
2475
2476 if (time_after(jiffies, ifsta->ibss_join_req +
2477 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2478 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2479 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2480 return ieee80211_sta_create_ibss(dev, ifsta);
2481 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2482 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2483 " configured channel %d (%d MHz)\n",
2484 dev->name, local->hw.conf.channel,
2485 local->hw.conf.freq);
2486 }
2487
2488 /* No IBSS found - decrease scan interval and continue
2489 * scanning. */
2490 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2491 }
2492
2493 ifsta->state = IEEE80211_IBSS_SEARCH;
2494 mod_timer(&ifsta->timer, jiffies + interval);
2495 return 0;
2496 }
2497
2498 return 0;
2499 }
2500
2501
2502 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2503 {
2504 struct ieee80211_sub_if_data *sdata;
2505 struct ieee80211_if_sta *ifsta;
2506 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2507
2508 if (len > IEEE80211_MAX_SSID_LEN)
2509 return -EINVAL;
2510
2511 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2512 * not defined. */
2513 if (local->ops->conf_tx) {
2514 struct ieee80211_tx_queue_params qparam;
2515 int i;
2516
2517 memset(&qparam, 0, sizeof(qparam));
2518 /* TODO: are these ok defaults for all hw_modes? */
2519 qparam.aifs = 2;
2520 qparam.cw_min =
2521 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2522 qparam.cw_max = 1023;
2523 qparam.burst_time = 0;
2524 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2525 {
2526 local->ops->conf_tx(local_to_hw(local),
2527 i + IEEE80211_TX_QUEUE_DATA0,
2528 &qparam);
2529 }
2530 /* IBSS uses different parameters for Beacon sending */
2531 qparam.cw_min++;
2532 qparam.cw_min *= 2;
2533 qparam.cw_min--;
2534 local->ops->conf_tx(local_to_hw(local),
2535 IEEE80211_TX_QUEUE_BEACON, &qparam);
2536 }
2537
2538 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2539 ifsta = &sdata->u.sta;
2540
2541 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2542 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2543 memcpy(ifsta->ssid, ssid, len);
2544 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2545 ifsta->ssid_len = len;
2546
2547 if (len)
2548 ifsta->flags |= IEEE80211_STA_SSID_SET;
2549 else
2550 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2551 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2552 !(ifsta->flags & IEEE80211_STA_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
2561 int 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
2571 int 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->flags |= IEEE80211_STA_BSSID_SET;
2592 else
2593 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2594
2595 return 0;
2596 }
2597
2598
2599 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2600 struct ieee80211_sub_if_data *sdata,
2601 int powersave)
2602 {
2603 struct sk_buff *skb;
2604 struct ieee80211_hdr *nullfunc;
2605 u16 fc;
2606
2607 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2608 if (!skb) {
2609 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2610 "frame\n", sdata->dev->name);
2611 return;
2612 }
2613 skb_reserve(skb, local->hw.extra_tx_headroom);
2614
2615 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2616 memset(nullfunc, 0, 24);
2617 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2618 IEEE80211_FCTL_TODS;
2619 if (powersave)
2620 fc |= IEEE80211_FCTL_PM;
2621 nullfunc->frame_control = cpu_to_le16(fc);
2622 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2623 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2624 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2625
2626 ieee80211_sta_tx(sdata->dev, skb, 0);
2627 }
2628
2629
2630 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2631 {
2632 struct ieee80211_local *local = hw_to_local(hw);
2633 struct net_device *dev = local->scan_dev;
2634 struct ieee80211_sub_if_data *sdata;
2635 union iwreq_data wrqu;
2636
2637 local->last_scan_completed = jiffies;
2638 wmb();
2639 local->sta_scanning = 0;
2640
2641 if (ieee80211_hw_config(local))
2642 printk(KERN_DEBUG "%s: failed to restore operational"
2643 "channel after scan\n", dev->name);
2644
2645 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2646 ieee80211_if_config(dev))
2647 printk(KERN_DEBUG "%s: failed to restore operational"
2648 "BSSID after scan\n", dev->name);
2649
2650 memset(&wrqu, 0, sizeof(wrqu));
2651 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2652
2653 read_lock(&local->sub_if_lock);
2654 list_for_each_entry(sdata, &local->sub_if_list, list) {
2655
2656 /* No need to wake the master device. */
2657 if (sdata->dev == local->mdev)
2658 continue;
2659
2660 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2661 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
2662 ieee80211_send_nullfunc(local, sdata, 0);
2663 ieee80211_sta_timer((unsigned long)sdata);
2664 }
2665
2666 netif_wake_queue(sdata->dev);
2667 }
2668 read_unlock(&local->sub_if_lock);
2669
2670 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2671 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2672 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2673 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2674 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2675 !ieee80211_sta_active_ibss(dev)))
2676 ieee80211_sta_find_ibss(dev, ifsta);
2677 }
2678 }
2679 EXPORT_SYMBOL(ieee80211_scan_completed);
2680
2681 void ieee80211_sta_scan_work(struct work_struct *work)
2682 {
2683 struct ieee80211_local *local =
2684 container_of(work, struct ieee80211_local, scan_work.work);
2685 struct net_device *dev = local->scan_dev;
2686 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2687 struct ieee80211_hw_mode *mode;
2688 struct ieee80211_channel *chan;
2689 int skip;
2690 unsigned long next_delay = 0;
2691
2692 if (!local->sta_scanning)
2693 return;
2694
2695 switch (local->scan_state) {
2696 case SCAN_SET_CHANNEL:
2697 mode = local->scan_hw_mode;
2698 if (local->scan_hw_mode->list.next == &local->modes_list &&
2699 local->scan_channel_idx >= mode->num_channels) {
2700 ieee80211_scan_completed(local_to_hw(local));
2701 return;
2702 }
2703 skip = !(local->enabled_modes & (1 << mode->mode));
2704 chan = &mode->channels[local->scan_channel_idx];
2705 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2706 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2707 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2708 (local->hw_modes & local->enabled_modes &
2709 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2710 skip = 1;
2711
2712 if (!skip) {
2713 #if 0
2714 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2715 dev->name, chan->chan, chan->freq);
2716 #endif
2717
2718 local->scan_channel = chan;
2719 if (ieee80211_hw_config(local)) {
2720 printk(KERN_DEBUG "%s: failed to set channel "
2721 "%d (%d MHz) for scan\n", dev->name,
2722 chan->chan, chan->freq);
2723 skip = 1;
2724 }
2725 }
2726
2727 local->scan_channel_idx++;
2728 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2729 if (local->scan_hw_mode->list.next != &local->modes_list) {
2730 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2731 struct ieee80211_hw_mode,
2732 list);
2733 local->scan_channel_idx = 0;
2734 }
2735 }
2736
2737 if (skip)
2738 break;
2739
2740 next_delay = IEEE80211_PROBE_DELAY +
2741 usecs_to_jiffies(local->hw.channel_change_time);
2742 local->scan_state = SCAN_SEND_PROBE;
2743 break;
2744 case SCAN_SEND_PROBE:
2745 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2746 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2747 local->scan_ssid_len);
2748 next_delay = IEEE80211_CHANNEL_TIME;
2749 } else
2750 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2751 local->scan_state = SCAN_SET_CHANNEL;
2752 break;
2753 }
2754
2755 if (local->sta_scanning)
2756 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2757 next_delay);
2758 }
2759
2760
2761 static int ieee80211_sta_start_scan(struct net_device *dev,
2762 u8 *ssid, size_t ssid_len)
2763 {
2764 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2765 struct ieee80211_sub_if_data *sdata;
2766
2767 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2768 return -EINVAL;
2769
2770 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2771 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2772 * BSSID: MACAddress
2773 * SSID
2774 * ScanType: ACTIVE, PASSIVE
2775 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2776 * a Probe frame during active scanning
2777 * ChannelList
2778 * MinChannelTime (>= ProbeDelay), in TU
2779 * MaxChannelTime: (>= MinChannelTime), in TU
2780 */
2781
2782 /* MLME-SCAN.confirm
2783 * BSSDescriptionSet
2784 * ResultCode: SUCCESS, INVALID_PARAMETERS
2785 */
2786
2787 if (local->sta_scanning) {
2788 if (local->scan_dev == dev)
2789 return 0;
2790 return -EBUSY;
2791 }
2792
2793 if (local->ops->hw_scan) {
2794 int rc = local->ops->hw_scan(local_to_hw(local),
2795 ssid, ssid_len);
2796 if (!rc) {
2797 local->sta_scanning = 1;
2798 local->scan_dev = dev;
2799 }
2800 return rc;
2801 }
2802
2803 local->sta_scanning = 1;
2804
2805 read_lock(&local->sub_if_lock);
2806 list_for_each_entry(sdata, &local->sub_if_list, list) {
2807
2808 /* Don't stop the master interface, otherwise we can't transmit
2809 * probes! */
2810 if (sdata->dev == local->mdev)
2811 continue;
2812
2813 netif_stop_queue(sdata->dev);
2814 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2815 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
2816 ieee80211_send_nullfunc(local, sdata, 1);
2817 }
2818 read_unlock(&local->sub_if_lock);
2819
2820 if (ssid) {
2821 local->scan_ssid_len = ssid_len;
2822 memcpy(local->scan_ssid, ssid, ssid_len);
2823 } else
2824 local->scan_ssid_len = 0;
2825 local->scan_state = SCAN_SET_CHANNEL;
2826 local->scan_hw_mode = list_entry(local->modes_list.next,
2827 struct ieee80211_hw_mode,
2828 list);
2829 local->scan_channel_idx = 0;
2830 local->scan_dev = dev;
2831
2832 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2833 ieee80211_if_config(dev))
2834 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2835 dev->name);
2836
2837 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2838 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2839 IEEE80211_CHANNEL_TIME);
2840
2841 return 0;
2842 }
2843
2844
2845 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2846 {
2847 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2848 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2849 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2850
2851 if (sdata->type != IEEE80211_IF_TYPE_STA)
2852 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2853
2854 if (local->sta_scanning) {
2855 if (local->scan_dev == dev)
2856 return 0;
2857 return -EBUSY;
2858 }
2859
2860 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2861 queue_work(local->hw.workqueue, &ifsta->work);
2862 return 0;
2863 }
2864
2865 static char *
2866 ieee80211_sta_scan_result(struct net_device *dev,
2867 struct ieee80211_sta_bss *bss,
2868 char *current_ev, char *end_buf)
2869 {
2870 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2871 struct iw_event iwe;
2872
2873 if (time_after(jiffies,
2874 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2875 return current_ev;
2876
2877 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2878 return current_ev;
2879
2880 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2881 !bss->wpa_ie && !bss->rsn_ie)
2882 return current_ev;
2883
2884 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2885 (local->scan_ssid_len != bss->ssid_len ||
2886 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2887 return current_ev;
2888
2889 memset(&iwe, 0, sizeof(iwe));
2890 iwe.cmd = SIOCGIWAP;
2891 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2892 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2893 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2894 IW_EV_ADDR_LEN);
2895
2896 memset(&iwe, 0, sizeof(iwe));
2897 iwe.cmd = SIOCGIWESSID;
2898 iwe.u.data.length = bss->ssid_len;
2899 iwe.u.data.flags = 1;
2900 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2901 bss->ssid);
2902
2903 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2904 memset(&iwe, 0, sizeof(iwe));
2905 iwe.cmd = SIOCGIWMODE;
2906 if (bss->capability & WLAN_CAPABILITY_ESS)
2907 iwe.u.mode = IW_MODE_MASTER;
2908 else
2909 iwe.u.mode = IW_MODE_ADHOC;
2910 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2911 IW_EV_UINT_LEN);
2912 }
2913
2914 memset(&iwe, 0, sizeof(iwe));
2915 iwe.cmd = SIOCGIWFREQ;
2916 iwe.u.freq.m = bss->channel;
2917 iwe.u.freq.e = 0;
2918 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2919 IW_EV_FREQ_LEN);
2920 iwe.u.freq.m = bss->freq * 100000;
2921 iwe.u.freq.e = 1;
2922 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2923 IW_EV_FREQ_LEN);
2924
2925 memset(&iwe, 0, sizeof(iwe));
2926 iwe.cmd = IWEVQUAL;
2927 iwe.u.qual.qual = bss->signal;
2928 iwe.u.qual.level = bss->rssi;
2929 iwe.u.qual.noise = bss->noise;
2930 iwe.u.qual.updated = local->wstats_flags;
2931 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2932 IW_EV_QUAL_LEN);
2933
2934 memset(&iwe, 0, sizeof(iwe));
2935 iwe.cmd = SIOCGIWENCODE;
2936 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2937 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2938 else
2939 iwe.u.data.flags = IW_ENCODE_DISABLED;
2940 iwe.u.data.length = 0;
2941 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2942
2943 if (bss && bss->wpa_ie) {
2944 memset(&iwe, 0, sizeof(iwe));
2945 iwe.cmd = IWEVGENIE;
2946 iwe.u.data.length = bss->wpa_ie_len;
2947 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2948 bss->wpa_ie);
2949 }
2950
2951 if (bss && bss->rsn_ie) {
2952 memset(&iwe, 0, sizeof(iwe));
2953 iwe.cmd = IWEVGENIE;
2954 iwe.u.data.length = bss->rsn_ie_len;
2955 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2956 bss->rsn_ie);
2957 }
2958
2959 if (bss && bss->supp_rates_len > 0) {
2960 /* display all supported rates in readable format */
2961 char *p = current_ev + IW_EV_LCP_LEN;
2962 int i;
2963
2964 memset(&iwe, 0, sizeof(iwe));
2965 iwe.cmd = SIOCGIWRATE;
2966 /* Those two flags are ignored... */
2967 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2968
2969 for (i = 0; i < bss->supp_rates_len; i++) {
2970 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2971 0x7f) * 500000);
2972 p = iwe_stream_add_value(current_ev, p,
2973 end_buf, &iwe, IW_EV_PARAM_LEN);
2974 }
2975 current_ev = p;
2976 }
2977
2978 if (bss) {
2979 char *buf;
2980 buf = kmalloc(30, GFP_ATOMIC);
2981 if (buf) {
2982 memset(&iwe, 0, sizeof(iwe));
2983 iwe.cmd = IWEVCUSTOM;
2984 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2985 iwe.u.data.length = strlen(buf);
2986 current_ev = iwe_stream_add_point(current_ev, end_buf,
2987 &iwe, buf);
2988 kfree(buf);
2989 }
2990 }
2991
2992 do {
2993 char *buf;
2994
2995 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2996 break;
2997
2998 buf = kmalloc(100, GFP_ATOMIC);
2999 if (!buf)
3000 break;
3001
3002 memset(&iwe, 0, sizeof(iwe));
3003 iwe.cmd = IWEVCUSTOM;
3004 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3005 iwe.u.data.length = strlen(buf);
3006 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3007 buf);
3008
3009 memset(&iwe, 0, sizeof(iwe));
3010 iwe.cmd = IWEVCUSTOM;
3011 sprintf(buf, "capab=0x%04x", bss->capability);
3012 iwe.u.data.length = strlen(buf);
3013 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3014 buf);
3015
3016 kfree(buf);
3017 break;
3018 } while (0);
3019
3020 return current_ev;
3021 }
3022
3023
3024 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3025 {
3026 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3027 char *current_ev = buf;
3028 char *end_buf = buf + len;
3029 struct ieee80211_sta_bss *bss;
3030
3031 spin_lock_bh(&local->sta_bss_lock);
3032 list_for_each_entry(bss, &local->sta_bss_list, list) {
3033 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3034 spin_unlock_bh(&local->sta_bss_lock);
3035 return -E2BIG;
3036 }
3037 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3038 end_buf);
3039 }
3040 spin_unlock_bh(&local->sta_bss_lock);
3041 return current_ev - buf;
3042 }
3043
3044
3045 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3046 {
3047 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3048 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3049 kfree(ifsta->extra_ie);
3050 if (len == 0) {
3051 ifsta->extra_ie = NULL;
3052 ifsta->extra_ie_len = 0;
3053 return 0;
3054 }
3055 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3056 if (!ifsta->extra_ie) {
3057 ifsta->extra_ie_len = 0;
3058 return -ENOMEM;
3059 }
3060 memcpy(ifsta->extra_ie, ie, len);
3061 ifsta->extra_ie_len = len;
3062 return 0;
3063 }
3064
3065
3066 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3067 struct sk_buff *skb, u8 *bssid,
3068 u8 *addr)
3069 {
3070 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3071 struct sta_info *sta;
3072 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3073
3074 /* TODO: Could consider removing the least recently used entry and
3075 * allow new one to be added. */
3076 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3077 if (net_ratelimit()) {
3078 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3079 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3080 }
3081 return NULL;
3082 }
3083
3084 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3085 local->mdev->name, MAC_ARG(addr), dev->name);
3086
3087 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3088 if (!sta)
3089 return NULL;
3090
3091 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3092
3093 rate_control_rate_init(sta, local);
3094
3095 return sta; /* caller will call sta_info_put() */
3096 }
3097
3098
3099 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3100 {
3101 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3102 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3103
3104 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3105 dev->name, reason);
3106
3107 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3108 sdata->type != IEEE80211_IF_TYPE_IBSS)
3109 return -EINVAL;
3110
3111 ieee80211_send_deauth(dev, ifsta, reason);
3112 ieee80211_set_disassoc(dev, ifsta, 1);
3113 return 0;
3114 }
3115
3116
3117 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3118 {
3119 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3120 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3121
3122 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3123 dev->name, reason);
3124
3125 if (sdata->type != IEEE80211_IF_TYPE_STA)
3126 return -EINVAL;
3127
3128 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3129 return -1;
3130
3131 ieee80211_send_disassoc(dev, ifsta, reason);
3132 ieee80211_set_disassoc(dev, ifsta, 0);
3133 return 0;
3134 }
Linux kernel - Deliverables
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