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[PATCH] mac80211: remove rtnl locking in ieee80211_sta.c
[linux-2.6/verdex.git] / net / mac80211 / ieee80211_sta.c
blob952d8dd0676cad9ab0c2ee9651aa2191b233d766
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 /* TODO:
15 * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
16 * order BSS list by RSSI(?) ("quality of AP")
17 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
18 * SSID)
19 */
20 #include <linux/delay.h>
21 #include <linux/if_ether.h>
22 #include <linux/skbuff.h>
23 #include <linux/netdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/wireless.h>
26 #include <linux/random.h>
27 #include <linux/etherdevice.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
30
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
33 #include "ieee80211_rate.h"
34 #include "hostapd_ioctl.h"
35
36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
40 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
41 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
42 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
43 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
44 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
45 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
46
47 #define IEEE80211_PROBE_DELAY (HZ / 33)
48 #define IEEE80211_CHANNEL_TIME (HZ / 33)
49 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
50 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
51 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
52 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
53
54 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
55
56
57 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
58
59 #define ERP_INFO_USE_PROTECTION BIT(1)
60
61 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
62 u8 *ssid, size_t ssid_len);
63 static struct ieee80211_sta_bss *
64 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
65 static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67 static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69 static int ieee80211_sta_wep_configured(struct net_device *dev);
70 static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72 static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76 /* Parsed Information Elements */
77 struct ieee802_11_elems {
78 /* pointers to IEs */
79 u8 *ssid;
80 u8 *supp_rates;
81 u8 *fh_params;
82 u8 *ds_params;
83 u8 *cf_params;
84 u8 *tim;
85 u8 *ibss_params;
86 u8 *challenge;
87 u8 *wpa;
88 u8 *rsn;
89 u8 *erp_info;
90 u8 *ext_supp_rates;
91 u8 *wmm_info;
92 u8 *wmm_param;
93
94 /* length of them, respectively */
95 u8 ssid_len;
96 u8 supp_rates_len;
97 u8 fh_params_len;
98 u8 ds_params_len;
99 u8 cf_params_len;
100 u8 tim_len;
101 u8 ibss_params_len;
102 u8 challenge_len;
103 u8 wpa_len;
104 u8 rsn_len;
105 u8 erp_info_len;
106 u8 ext_supp_rates_len;
107 u8 wmm_info_len;
108 u8 wmm_param_len;
109 };
110
111 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
112
113
114 static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
115 struct ieee802_11_elems *elems)
116 {
117 size_t left = len;
118 u8 *pos = start;
119 int unknown = 0;
120
121 memset(elems, 0, sizeof(*elems));
122
123 while (left >= 2) {
124 u8 id, elen;
125
126 id = *pos++;
127 elen = *pos++;
128 left -= 2;
129
130 if (elen > left) {
131 #if 0
132 if (net_ratelimit())
133 printk(KERN_DEBUG "IEEE 802.11 element parse "
134 "failed (id=%d elen=%d left=%d)\n",
135 id, elen, left);
136 #endif
137 return ParseFailed;
138 }
139
140 switch (id) {
141 case WLAN_EID_SSID:
142 elems->ssid = pos;
143 elems->ssid_len = elen;
144 break;
145 case WLAN_EID_SUPP_RATES:
146 elems->supp_rates = pos;
147 elems->supp_rates_len = elen;
148 break;
149 case WLAN_EID_FH_PARAMS:
150 elems->fh_params = pos;
151 elems->fh_params_len = elen;
152 break;
153 case WLAN_EID_DS_PARAMS:
154 elems->ds_params = pos;
155 elems->ds_params_len = elen;
156 break;
157 case WLAN_EID_CF_PARAMS:
158 elems->cf_params = pos;
159 elems->cf_params_len = elen;
160 break;
161 case WLAN_EID_TIM:
162 elems->tim = pos;
163 elems->tim_len = elen;
164 break;
165 case WLAN_EID_IBSS_PARAMS:
166 elems->ibss_params = pos;
167 elems->ibss_params_len = elen;
168 break;
169 case WLAN_EID_CHALLENGE:
170 elems->challenge = pos;
171 elems->challenge_len = elen;
172 break;
173 case WLAN_EID_WPA:
174 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
175 pos[2] == 0xf2) {
176 /* Microsoft OUI (00:50:F2) */
177 if (pos[3] == 1) {
178 /* OUI Type 1 - WPA IE */
179 elems->wpa = pos;
180 elems->wpa_len = elen;
181 } else if (elen >= 5 && pos[3] == 2) {
182 if (pos[4] == 0) {
183 elems->wmm_info = pos;
184 elems->wmm_info_len = elen;
185 } else if (pos[4] == 1) {
186 elems->wmm_param = pos;
187 elems->wmm_param_len = elen;
188 }
189 }
190 }
191 break;
192 case WLAN_EID_RSN:
193 elems->rsn = pos;
194 elems->rsn_len = elen;
195 break;
196 case WLAN_EID_ERP_INFO:
197 elems->erp_info = pos;
198 elems->erp_info_len = elen;
199 break;
200 case WLAN_EID_EXT_SUPP_RATES:
201 elems->ext_supp_rates = pos;
202 elems->ext_supp_rates_len = elen;
203 break;
204 default:
205 #if 0
206 printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
207 "unknown element (id=%d elen=%d)\n",
208 id, elen);
209 #endif
210 unknown++;
211 break;
212 }
213
214 left -= elen;
215 pos += elen;
216 }
217
218 /* Do not trigger error if left == 1 as Apple Airport base stations
219 * send AssocResps that are one spurious byte too long. */
220
221 return unknown ? ParseUnknown : ParseOK;
222 }
223
224
225
226
227 static int ecw2cw(int ecw)
228 {
229 int cw = 1;
230 while (ecw > 0) {
231 cw <<= 1;
232 ecw--;
233 }
234 return cw - 1;
235 }
236
237
238 static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241 {
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(&params, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313 }
314
315
316 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
317 {
318 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
319 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
320 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
321
322 if (use_protection != sdata->use_protection) {
323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
325 MAC_FMT ")\n",
326 dev->name,
327 use_protection ? "enabled" : "disabled",
328 MAC_ARG(ifsta->bssid));
329 }
330 sdata->use_protection = use_protection;
331 }
332 }
333
334
335 static void ieee80211_sta_send_associnfo(struct net_device *dev,
336 struct ieee80211_if_sta *ifsta)
337 {
338 char *buf;
339 size_t len;
340 int i;
341 union iwreq_data wrqu;
342
343 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
344 return;
345
346 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
347 ifsta->assocresp_ies_len), GFP_ATOMIC);
348 if (!buf)
349 return;
350
351 len = sprintf(buf, "ASSOCINFO(");
352 if (ifsta->assocreq_ies) {
353 len += sprintf(buf + len, "ReqIEs=");
354 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
355 len += sprintf(buf + len, "%02x",
356 ifsta->assocreq_ies[i]);
357 }
358 }
359 if (ifsta->assocresp_ies) {
360 if (ifsta->assocreq_ies)
361 len += sprintf(buf + len, " ");
362 len += sprintf(buf + len, "RespIEs=");
363 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
364 len += sprintf(buf + len, "%02x",
365 ifsta->assocresp_ies[i]);
366 }
367 }
368 len += sprintf(buf + len, ")");
369
370 if (len > IW_CUSTOM_MAX) {
371 len = sprintf(buf, "ASSOCRESPIE=");
372 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
373 len += sprintf(buf + len, "%02x",
374 ifsta->assocresp_ies[i]);
375 }
376 }
377
378 memset(&wrqu, 0, sizeof(wrqu));
379 wrqu.data.length = len;
380 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
381
382 kfree(buf);
383 }
384
385
386 static void ieee80211_set_associated(struct net_device *dev,
387 struct ieee80211_if_sta *ifsta, int assoc)
388 {
389 union iwreq_data wrqu;
390 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
391
392 if (ifsta->associated == assoc)
393 return;
394
395 ifsta->associated = assoc;
396
397 if (assoc) {
398 struct ieee80211_sub_if_data *sdata;
399 struct ieee80211_sta_bss *bss;
400 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
401 if (sdata->type != IEEE80211_IF_TYPE_STA)
402 return;
403
404 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
405 if (bss) {
406 if (bss->has_erp_value)
407 ieee80211_handle_erp_ie(dev, bss->erp_value);
408 ieee80211_rx_bss_put(dev, bss);
409 }
410
411 netif_carrier_on(dev);
412 ifsta->prev_bssid_set = 1;
413 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
414 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
415 ieee80211_sta_send_associnfo(dev, ifsta);
416 } else {
417 netif_carrier_off(dev);
418 sdata->use_protection = 0;
419 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
420 }
421 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
422 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
423 ifsta->last_probe = jiffies;
424 }
425
426 static void ieee80211_set_disassoc(struct net_device *dev,
427 struct ieee80211_if_sta *ifsta, int deauth)
428 {
429 if (deauth)
430 ifsta->auth_tries = 0;
431 ifsta->assoc_tries = 0;
432 ieee80211_set_associated(dev, ifsta, 0);
433 }
434
435 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
436 int encrypt)
437 {
438 struct ieee80211_sub_if_data *sdata;
439 struct ieee80211_tx_packet_data *pkt_data;
440
441 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
442 skb->dev = sdata->local->mdev;
443 skb_set_mac_header(skb, 0);
444 skb_set_network_header(skb, 0);
445 skb_set_transport_header(skb, 0);
446
447 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
448 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
449 pkt_data->ifindex = sdata->dev->ifindex;
450 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
451 pkt_data->do_not_encrypt = !encrypt;
452
453 dev_queue_xmit(skb);
454 }
455
456
457 static void ieee80211_send_auth(struct net_device *dev,
458 struct ieee80211_if_sta *ifsta,
459 int transaction, u8 *extra, size_t extra_len,
460 int encrypt)
461 {
462 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
463 struct sk_buff *skb;
464 struct ieee80211_mgmt *mgmt;
465
466 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
467 sizeof(*mgmt) + 6 + extra_len);
468 if (!skb) {
469 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
470 "frame\n", dev->name);
471 return;
472 }
473 skb_reserve(skb, local->hw.extra_tx_headroom);
474
475 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
476 memset(mgmt, 0, 24 + 6);
477 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
478 IEEE80211_STYPE_AUTH);
479 if (encrypt)
480 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
481 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
482 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
483 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
484 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
485 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
486 ifsta->auth_transaction = transaction + 1;
487 mgmt->u.auth.status_code = cpu_to_le16(0);
488 if (extra)
489 memcpy(skb_put(skb, extra_len), extra, extra_len);
490
491 ieee80211_sta_tx(dev, skb, encrypt);
492 }
493
494
495 static void ieee80211_authenticate(struct net_device *dev,
496 struct ieee80211_if_sta *ifsta)
497 {
498 ifsta->auth_tries++;
499 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
500 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
501 " timed out\n",
502 dev->name, MAC_ARG(ifsta->bssid));
503 ifsta->state = IEEE80211_DISABLED;
504 return;
505 }
506
507 ifsta->state = IEEE80211_AUTHENTICATE;
508 printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
509 dev->name, MAC_ARG(ifsta->bssid));
510
511 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
512
513 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
514 }
515
516
517 static void ieee80211_send_assoc(struct net_device *dev,
518 struct ieee80211_if_sta *ifsta)
519 {
520 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
521 struct ieee80211_hw_mode *mode;
522 struct sk_buff *skb;
523 struct ieee80211_mgmt *mgmt;
524 u8 *pos, *ies;
525 int i, len;
526 u16 capab;
527 struct ieee80211_sta_bss *bss;
528 int wmm = 0;
529
530 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
531 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
532 ifsta->ssid_len);
533 if (!skb) {
534 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
535 "frame\n", dev->name);
536 return;
537 }
538 skb_reserve(skb, local->hw.extra_tx_headroom);
539
540 mode = local->oper_hw_mode;
541 capab = ifsta->capab;
542 if (mode->mode == MODE_IEEE80211G) {
543 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
544 WLAN_CAPABILITY_SHORT_PREAMBLE;
545 }
546 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
547 if (bss) {
548 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
549 capab |= WLAN_CAPABILITY_PRIVACY;
550 if (bss->wmm_ie) {
551 wmm = 1;
552 }
553 ieee80211_rx_bss_put(dev, bss);
554 }
555
556 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
557 memset(mgmt, 0, 24);
558 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
559 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
560 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
561
562 if (ifsta->prev_bssid_set) {
563 skb_put(skb, 10);
564 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
565 IEEE80211_STYPE_REASSOC_REQ);
566 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
567 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
568 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
569 ETH_ALEN);
570 } else {
571 skb_put(skb, 4);
572 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
573 IEEE80211_STYPE_ASSOC_REQ);
574 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
575 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
576 }
577
578 /* SSID */
579 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
580 *pos++ = WLAN_EID_SSID;
581 *pos++ = ifsta->ssid_len;
582 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
583
584 len = mode->num_rates;
585 if (len > 8)
586 len = 8;
587 pos = skb_put(skb, len + 2);
588 *pos++ = WLAN_EID_SUPP_RATES;
589 *pos++ = len;
590 for (i = 0; i < len; i++) {
591 int rate = mode->rates[i].rate;
592 if (mode->mode == MODE_ATHEROS_TURBO)
593 rate /= 2;
594 *pos++ = (u8) (rate / 5);
595 }
596
597 if (mode->num_rates > len) {
598 pos = skb_put(skb, mode->num_rates - len + 2);
599 *pos++ = WLAN_EID_EXT_SUPP_RATES;
600 *pos++ = mode->num_rates - len;
601 for (i = len; i < mode->num_rates; i++) {
602 int rate = mode->rates[i].rate;
603 if (mode->mode == MODE_ATHEROS_TURBO)
604 rate /= 2;
605 *pos++ = (u8) (rate / 5);
606 }
607 }
608
609 if (ifsta->extra_ie) {
610 pos = skb_put(skb, ifsta->extra_ie_len);
611 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
612 }
613
614 if (wmm && ifsta->wmm_enabled) {
615 pos = skb_put(skb, 9);
616 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
617 *pos++ = 7; /* len */
618 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
619 *pos++ = 0x50;
620 *pos++ = 0xf2;
621 *pos++ = 2; /* WME */
622 *pos++ = 0; /* WME info */
623 *pos++ = 1; /* WME ver */
624 *pos++ = 0;
625 }
626
627 kfree(ifsta->assocreq_ies);
628 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
629 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
630 if (ifsta->assocreq_ies)
631 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
632
633 ieee80211_sta_tx(dev, skb, 0);
634 }
635
636
637 static void ieee80211_send_deauth(struct net_device *dev,
638 struct ieee80211_if_sta *ifsta, u16 reason)
639 {
640 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
641 struct sk_buff *skb;
642 struct ieee80211_mgmt *mgmt;
643
644 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
645 if (!skb) {
646 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
647 "frame\n", dev->name);
648 return;
649 }
650 skb_reserve(skb, local->hw.extra_tx_headroom);
651
652 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
653 memset(mgmt, 0, 24);
654 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
655 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
656 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
657 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
658 IEEE80211_STYPE_DEAUTH);
659 skb_put(skb, 2);
660 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
661
662 ieee80211_sta_tx(dev, skb, 0);
663 }
664
665
666 static void ieee80211_send_disassoc(struct net_device *dev,
667 struct ieee80211_if_sta *ifsta, u16 reason)
668 {
669 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
670 struct sk_buff *skb;
671 struct ieee80211_mgmt *mgmt;
672
673 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
674 if (!skb) {
675 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
676 "frame\n", dev->name);
677 return;
678 }
679 skb_reserve(skb, local->hw.extra_tx_headroom);
680
681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
682 memset(mgmt, 0, 24);
683 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
684 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
685 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
686 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
687 IEEE80211_STYPE_DISASSOC);
688 skb_put(skb, 2);
689 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
690
691 ieee80211_sta_tx(dev, skb, 0);
692 }
693
694
695 static int ieee80211_privacy_mismatch(struct net_device *dev,
696 struct ieee80211_if_sta *ifsta)
697 {
698 struct ieee80211_sta_bss *bss;
699 int res = 0;
700
701 if (!ifsta || ifsta->mixed_cell ||
702 ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
703 return 0;
704
705 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
706 if (!bss)
707 return 0;
708
709 if (ieee80211_sta_wep_configured(dev) !=
710 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
711 res = 1;
712
713 ieee80211_rx_bss_put(dev, bss);
714
715 return res;
716 }
717
718
719 static void ieee80211_associate(struct net_device *dev,
720 struct ieee80211_if_sta *ifsta)
721 {
722 ifsta->assoc_tries++;
723 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
724 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
725 " timed out\n",
726 dev->name, MAC_ARG(ifsta->bssid));
727 ifsta->state = IEEE80211_DISABLED;
728 return;
729 }
730
731 ifsta->state = IEEE80211_ASSOCIATE;
732 printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
733 dev->name, MAC_ARG(ifsta->bssid));
734 if (ieee80211_privacy_mismatch(dev, ifsta)) {
735 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
736 "mixed-cell disabled - abort association\n", dev->name);
737 ifsta->state = IEEE80211_DISABLED;
738 return;
739 }
740
741 ieee80211_send_assoc(dev, ifsta);
742
743 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
744 }
745
746
747 static void ieee80211_associated(struct net_device *dev,
748 struct ieee80211_if_sta *ifsta)
749 {
750 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
751 struct sta_info *sta;
752 int disassoc;
753
754 /* TODO: start monitoring current AP signal quality and number of
755 * missed beacons. Scan other channels every now and then and search
756 * for better APs. */
757 /* TODO: remove expired BSSes */
758
759 ifsta->state = IEEE80211_ASSOCIATED;
760
761 sta = sta_info_get(local, ifsta->bssid);
762 if (!sta) {
763 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
764 dev->name, MAC_ARG(ifsta->bssid));
765 disassoc = 1;
766 } else {
767 disassoc = 0;
768 if (time_after(jiffies,
769 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
770 if (ifsta->probereq_poll) {
771 printk(KERN_DEBUG "%s: No ProbeResp from "
772 "current AP " MAC_FMT " - assume out of "
773 "range\n",
774 dev->name, MAC_ARG(ifsta->bssid));
775 disassoc = 1;
776 sta_info_free(sta, 0);
777 ifsta->probereq_poll = 0;
778 } else {
779 ieee80211_send_probe_req(dev, ifsta->bssid,
780 local->scan_ssid,
781 local->scan_ssid_len);
782 ifsta->probereq_poll = 1;
783 }
784 } else {
785 ifsta->probereq_poll = 0;
786 if (time_after(jiffies, ifsta->last_probe +
787 IEEE80211_PROBE_INTERVAL)) {
788 ifsta->last_probe = jiffies;
789 ieee80211_send_probe_req(dev, ifsta->bssid,
790 ifsta->ssid,
791 ifsta->ssid_len);
792 }
793 }
794 sta_info_put(sta);
795 }
796 if (disassoc) {
797 union iwreq_data wrqu;
798 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
799 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
800 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
801 mod_timer(&ifsta->timer, jiffies +
802 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
803 } else {
804 mod_timer(&ifsta->timer, jiffies +
805 IEEE80211_MONITORING_INTERVAL);
806 }
807 }
808
809
810 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
811 u8 *ssid, size_t ssid_len)
812 {
813 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
814 struct ieee80211_hw_mode *mode;
815 struct sk_buff *skb;
816 struct ieee80211_mgmt *mgmt;
817 u8 *pos, *supp_rates, *esupp_rates = NULL;
818 int i;
819
820 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
821 if (!skb) {
822 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
823 "request\n", dev->name);
824 return;
825 }
826 skb_reserve(skb, local->hw.extra_tx_headroom);
827
828 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
829 memset(mgmt, 0, 24);
830 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
831 IEEE80211_STYPE_PROBE_REQ);
832 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
833 if (dst) {
834 memcpy(mgmt->da, dst, ETH_ALEN);
835 memcpy(mgmt->bssid, dst, ETH_ALEN);
836 } else {
837 memset(mgmt->da, 0xff, ETH_ALEN);
838 memset(mgmt->bssid, 0xff, ETH_ALEN);
839 }
840 pos = skb_put(skb, 2 + ssid_len);
841 *pos++ = WLAN_EID_SSID;
842 *pos++ = ssid_len;
843 memcpy(pos, ssid, ssid_len);
844
845 supp_rates = skb_put(skb, 2);
846 supp_rates[0] = WLAN_EID_SUPP_RATES;
847 supp_rates[1] = 0;
848 mode = local->oper_hw_mode;
849 for (i = 0; i < mode->num_rates; i++) {
850 struct ieee80211_rate *rate = &mode->rates[i];
851 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
852 continue;
853 if (esupp_rates) {
854 pos = skb_put(skb, 1);
855 esupp_rates[1]++;
856 } else if (supp_rates[1] == 8) {
857 esupp_rates = skb_put(skb, 3);
858 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
859 esupp_rates[1] = 1;
860 pos = &esupp_rates[2];
861 } else {
862 pos = skb_put(skb, 1);
863 supp_rates[1]++;
864 }
865 if (mode->mode == MODE_ATHEROS_TURBO)
866 *pos = rate->rate / 10;
867 else
868 *pos = rate->rate / 5;
869 }
870
871 ieee80211_sta_tx(dev, skb, 0);
872 }
873
874
875 static int ieee80211_sta_wep_configured(struct net_device *dev)
876 {
877 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
878 if (!sdata || !sdata->default_key ||
879 sdata->default_key->alg != ALG_WEP)
880 return 0;
881 return 1;
882 }
883
884
885 static void ieee80211_auth_completed(struct net_device *dev,
886 struct ieee80211_if_sta *ifsta)
887 {
888 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
889 ifsta->authenticated = 1;
890 ieee80211_associate(dev, ifsta);
891 }
892
893
894 static void ieee80211_auth_challenge(struct net_device *dev,
895 struct ieee80211_if_sta *ifsta,
896 struct ieee80211_mgmt *mgmt,
897 size_t len)
898 {
899 u8 *pos;
900 struct ieee802_11_elems elems;
901
902 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
903 pos = mgmt->u.auth.variable;
904 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
905 == ParseFailed) {
906 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
907 dev->name);
908 return;
909 }
910 if (!elems.challenge) {
911 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
912 "frame\n", dev->name);
913 return;
914 }
915 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
916 elems.challenge_len + 2, 1);
917 }
918
919
920 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
921 struct ieee80211_if_sta *ifsta,
922 struct ieee80211_mgmt *mgmt,
923 size_t len)
924 {
925 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
926 u16 auth_alg, auth_transaction, status_code;
927
928 if (ifsta->state != IEEE80211_AUTHENTICATE &&
929 sdata->type != IEEE80211_IF_TYPE_IBSS) {
930 printk(KERN_DEBUG "%s: authentication frame received from "
931 MAC_FMT ", but not in authenticate state - ignored\n",
932 dev->name, MAC_ARG(mgmt->sa));
933 return;
934 }
935
936 if (len < 24 + 6) {
937 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
938 "received from " MAC_FMT " - ignored\n",
939 dev->name, len, MAC_ARG(mgmt->sa));
940 return;
941 }
942
943 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
944 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
945 printk(KERN_DEBUG "%s: authentication frame received from "
946 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
947 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
948 MAC_ARG(mgmt->bssid));
949 return;
950 }
951
952 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
953 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
954 printk(KERN_DEBUG "%s: authentication frame received from "
955 "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
956 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
957 MAC_ARG(mgmt->bssid));
958 return;
959 }
960
961 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
962 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
963 status_code = le16_to_cpu(mgmt->u.auth.status_code);
964
965 printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
966 "transaction=%d status=%d)\n",
967 dev->name, MAC_ARG(mgmt->sa), auth_alg,
968 auth_transaction, status_code);
969
970 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
971 /* IEEE 802.11 standard does not require authentication in IBSS
972 * networks and most implementations do not seem to use it.
973 * However, try to reply to authentication attempts if someone
974 * has actually implemented this.
975 * TODO: Could implement shared key authentication. */
976 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
977 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
978 "frame (alg=%d transaction=%d)\n",
979 dev->name, auth_alg, auth_transaction);
980 return;
981 }
982 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
983 }
984
985 if (auth_alg != ifsta->auth_alg ||
986 auth_transaction != ifsta->auth_transaction) {
987 printk(KERN_DEBUG "%s: unexpected authentication frame "
988 "(alg=%d transaction=%d)\n",
989 dev->name, auth_alg, auth_transaction);
990 return;
991 }
992
993 if (status_code != WLAN_STATUS_SUCCESS) {
994 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
995 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
996 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
997 u8 algs[3];
998 const int num_algs = ARRAY_SIZE(algs);
999 int i, pos;
1000 algs[0] = algs[1] = algs[2] = 0xff;
1001 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1002 algs[0] = WLAN_AUTH_OPEN;
1003 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1004 algs[1] = WLAN_AUTH_SHARED_KEY;
1005 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1006 algs[2] = WLAN_AUTH_LEAP;
1007 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1008 pos = 0;
1009 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1010 pos = 1;
1011 else
1012 pos = 2;
1013 for (i = 0; i < num_algs; i++) {
1014 pos++;
1015 if (pos >= num_algs)
1016 pos = 0;
1017 if (algs[pos] == ifsta->auth_alg ||
1018 algs[pos] == 0xff)
1019 continue;
1020 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1021 !ieee80211_sta_wep_configured(dev))
1022 continue;
1023 ifsta->auth_alg = algs[pos];
1024 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1025 "next try\n",
1026 dev->name, ifsta->auth_alg);
1027 break;
1028 }
1029 }
1030 return;
1031 }
1032
1033 switch (ifsta->auth_alg) {
1034 case WLAN_AUTH_OPEN:
1035 case WLAN_AUTH_LEAP:
1036 ieee80211_auth_completed(dev, ifsta);
1037 break;
1038 case WLAN_AUTH_SHARED_KEY:
1039 if (ifsta->auth_transaction == 4)
1040 ieee80211_auth_completed(dev, ifsta);
1041 else
1042 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1043 break;
1044 }
1045 }
1046
1047
1048 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1049 struct ieee80211_if_sta *ifsta,
1050 struct ieee80211_mgmt *mgmt,
1051 size_t len)
1052 {
1053 u16 reason_code;
1054
1055 if (len < 24 + 2) {
1056 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1057 "received from " MAC_FMT " - ignored\n",
1058 dev->name, len, MAC_ARG(mgmt->sa));
1059 return;
1060 }
1061
1062 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1063 printk(KERN_DEBUG "%s: deauthentication frame received from "
1064 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1065 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1066 MAC_ARG(mgmt->bssid));
1067 return;
1068 }
1069
1070 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1071
1072 printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1073 " (reason=%d)\n",
1074 dev->name, MAC_ARG(mgmt->sa), reason_code);
1075
1076 if (ifsta->authenticated) {
1077 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1078 }
1079
1080 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1081 ifsta->state == IEEE80211_ASSOCIATE ||
1082 ifsta->state == IEEE80211_ASSOCIATED) {
1083 ifsta->state = IEEE80211_AUTHENTICATE;
1084 mod_timer(&ifsta->timer, jiffies +
1085 IEEE80211_RETRY_AUTH_INTERVAL);
1086 }
1087
1088 ieee80211_set_disassoc(dev, ifsta, 1);
1089 ifsta->authenticated = 0;
1090 }
1091
1092
1093 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1094 struct ieee80211_if_sta *ifsta,
1095 struct ieee80211_mgmt *mgmt,
1096 size_t len)
1097 {
1098 u16 reason_code;
1099
1100 if (len < 24 + 2) {
1101 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1102 "received from " MAC_FMT " - ignored\n",
1103 dev->name, len, MAC_ARG(mgmt->sa));
1104 return;
1105 }
1106
1107 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1108 printk(KERN_DEBUG "%s: disassociation frame received from "
1109 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1110 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1111 MAC_ARG(mgmt->bssid));
1112 return;
1113 }
1114
1115 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1116
1117 printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1118 " (reason=%d)\n",
1119 dev->name, MAC_ARG(mgmt->sa), reason_code);
1120
1121 if (ifsta->associated)
1122 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1123
1124 if (ifsta->state == IEEE80211_ASSOCIATED) {
1125 ifsta->state = IEEE80211_ASSOCIATE;
1126 mod_timer(&ifsta->timer, jiffies +
1127 IEEE80211_RETRY_AUTH_INTERVAL);
1128 }
1129
1130 ieee80211_set_disassoc(dev, ifsta, 0);
1131 }
1132
1133
1134 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1135 struct ieee80211_if_sta *ifsta,
1136 struct ieee80211_mgmt *mgmt,
1137 size_t len,
1138 int reassoc)
1139 {
1140 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1141 struct ieee80211_hw_mode *mode;
1142 struct sta_info *sta;
1143 u32 rates;
1144 u16 capab_info, status_code, aid;
1145 struct ieee802_11_elems elems;
1146 u8 *pos;
1147 int i, j;
1148
1149 /* AssocResp and ReassocResp have identical structure, so process both
1150 * of them in this function. */
1151
1152 if (ifsta->state != IEEE80211_ASSOCIATE) {
1153 printk(KERN_DEBUG "%s: association frame received from "
1154 MAC_FMT ", but not in associate state - ignored\n",
1155 dev->name, MAC_ARG(mgmt->sa));
1156 return;
1157 }
1158
1159 if (len < 24 + 6) {
1160 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1161 "received from " MAC_FMT " - ignored\n",
1162 dev->name, len, MAC_ARG(mgmt->sa));
1163 return;
1164 }
1165
1166 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1167 printk(KERN_DEBUG "%s: association frame received from "
1168 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1169 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1170 MAC_ARG(mgmt->bssid));
1171 return;
1172 }
1173
1174 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1175 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1176 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1177 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1178 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1179 "set\n", dev->name, aid);
1180 aid &= ~(BIT(15) | BIT(14));
1181
1182 printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1183 "status=%d aid=%d)\n",
1184 dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1185 capab_info, status_code, aid);
1186
1187 if (status_code != WLAN_STATUS_SUCCESS) {
1188 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1189 dev->name, status_code);
1190 if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1191 ifsta->prev_bssid_set = 0;
1192 return;
1193 }
1194
1195 pos = mgmt->u.assoc_resp.variable;
1196 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1197 == ParseFailed) {
1198 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1199 dev->name);
1200 return;
1201 }
1202
1203 if (!elems.supp_rates) {
1204 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1205 dev->name);
1206 return;
1207 }
1208
1209 /* it probably doesn't, but if the frame includes an ERP value then
1210 * update our stored copy */
1211 if (elems.erp_info && elems.erp_info_len >= 1) {
1212 struct ieee80211_sta_bss *bss
1213 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1214 if (bss) {
1215 bss->erp_value = elems.erp_info[0];
1216 bss->has_erp_value = 1;
1217 ieee80211_rx_bss_put(dev, bss);
1218 }
1219 }
1220
1221 printk(KERN_DEBUG "%s: associated\n", dev->name);
1222 ifsta->aid = aid;
1223 ifsta->ap_capab = capab_info;
1224
1225 kfree(ifsta->assocresp_ies);
1226 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1227 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1228 if (ifsta->assocresp_ies)
1229 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1230
1231 ieee80211_set_associated(dev, ifsta, 1);
1232
1233 /* Add STA entry for the AP */
1234 sta = sta_info_get(local, ifsta->bssid);
1235 if (!sta) {
1236 struct ieee80211_sta_bss *bss;
1237 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1238 if (!sta) {
1239 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1240 " AP\n", dev->name);
1241 return;
1242 }
1243 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1244 if (bss) {
1245 sta->last_rssi = bss->rssi;
1246 sta->last_signal = bss->signal;
1247 sta->last_noise = bss->noise;
1248 ieee80211_rx_bss_put(dev, bss);
1249 }
1250 }
1251
1252 sta->dev = dev;
1253 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1254 sta->assoc_ap = 1;
1255
1256 rates = 0;
1257 mode = local->oper_hw_mode;
1258 for (i = 0; i < elems.supp_rates_len; i++) {
1259 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1260 if (mode->mode == MODE_ATHEROS_TURBO)
1261 rate *= 2;
1262 for (j = 0; j < mode->num_rates; j++)
1263 if (mode->rates[j].rate == rate)
1264 rates |= BIT(j);
1265 }
1266 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1267 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1268 if (mode->mode == MODE_ATHEROS_TURBO)
1269 rate *= 2;
1270 for (j = 0; j < mode->num_rates; j++)
1271 if (mode->rates[j].rate == rate)
1272 rates |= BIT(j);
1273 }
1274 sta->supp_rates = rates;
1275
1276 rate_control_rate_init(sta, local);
1277
1278 if (elems.wmm_param && ifsta->wmm_enabled) {
1279 sta->flags |= WLAN_STA_WME;
1280 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1281 elems.wmm_param_len);
1282 }
1283
1284
1285 sta_info_put(sta);
1286
1287 ieee80211_associated(dev, ifsta);
1288 }
1289
1290
1291 /* Caller must hold local->sta_bss_lock */
1292 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1293 struct ieee80211_sta_bss *bss)
1294 {
1295 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1296 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1297 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1298 }
1299
1300
1301 /* Caller must hold local->sta_bss_lock */
1302 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1303 struct ieee80211_sta_bss *bss)
1304 {
1305 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1306 struct ieee80211_sta_bss *b, *prev = NULL;
1307 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1308 while (b) {
1309 if (b == bss) {
1310 if (!prev)
1311 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1312 bss->hnext;
1313 else
1314 prev->hnext = bss->hnext;
1315 break;
1316 }
1317 prev = b;
1318 b = b->hnext;
1319 }
1320 }
1321
1322
1323 static struct ieee80211_sta_bss *
1324 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1325 {
1326 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1327 struct ieee80211_sta_bss *bss;
1328
1329 bss = kmalloc(sizeof(*bss), GFP_ATOMIC);
1330 if (!bss)
1331 return NULL;
1332 memset(bss, 0, sizeof(*bss));
1333 atomic_inc(&bss->users);
1334 atomic_inc(&bss->users);
1335 memcpy(bss->bssid, bssid, ETH_ALEN);
1336
1337 spin_lock_bh(&local->sta_bss_lock);
1338 /* TODO: order by RSSI? */
1339 list_add_tail(&bss->list, &local->sta_bss_list);
1340 __ieee80211_rx_bss_hash_add(dev, bss);
1341 spin_unlock_bh(&local->sta_bss_lock);
1342 return bss;
1343 }
1344
1345
1346 static struct ieee80211_sta_bss *
1347 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1348 {
1349 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1350 struct ieee80211_sta_bss *bss;
1351
1352 spin_lock_bh(&local->sta_bss_lock);
1353 bss = local->sta_bss_hash[STA_HASH(bssid)];
1354 while (bss) {
1355 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1356 atomic_inc(&bss->users);
1357 break;
1358 }
1359 bss = bss->hnext;
1360 }
1361 spin_unlock_bh(&local->sta_bss_lock);
1362 return bss;
1363 }
1364
1365
1366 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1367 {
1368 kfree(bss->wpa_ie);
1369 kfree(bss->rsn_ie);
1370 kfree(bss->wmm_ie);
1371 kfree(bss);
1372 }
1373
1374
1375 static void ieee80211_rx_bss_put(struct net_device *dev,
1376 struct ieee80211_sta_bss *bss)
1377 {
1378 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1379 if (!atomic_dec_and_test(&bss->users))
1380 return;
1381
1382 spin_lock_bh(&local->sta_bss_lock);
1383 __ieee80211_rx_bss_hash_del(dev, bss);
1384 list_del(&bss->list);
1385 spin_unlock_bh(&local->sta_bss_lock);
1386 ieee80211_rx_bss_free(bss);
1387 }
1388
1389
1390 void ieee80211_rx_bss_list_init(struct net_device *dev)
1391 {
1392 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1393 spin_lock_init(&local->sta_bss_lock);
1394 INIT_LIST_HEAD(&local->sta_bss_list);
1395 }
1396
1397
1398 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1399 {
1400 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401 struct ieee80211_sta_bss *bss, *tmp;
1402
1403 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1404 ieee80211_rx_bss_put(dev, bss);
1405 }
1406
1407
1408 static void ieee80211_rx_bss_info(struct net_device *dev,
1409 struct ieee80211_mgmt *mgmt,
1410 size_t len,
1411 struct ieee80211_rx_status *rx_status,
1412 int beacon)
1413 {
1414 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1415 struct ieee802_11_elems elems;
1416 size_t baselen;
1417 int channel, invalid = 0, clen;
1418 struct ieee80211_sta_bss *bss;
1419 struct sta_info *sta;
1420 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1421 u64 timestamp;
1422
1423 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1424 return; /* ignore ProbeResp to foreign address */
1425
1426 #if 0
1427 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1428 dev->name, beacon ? "Beacon" : "Probe Response",
1429 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1430 #endif
1431
1432 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1433 if (baselen > len)
1434 return;
1435
1436 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1437
1438 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1439 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1440 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1441 static unsigned long last_tsf_debug = 0;
1442 u64 tsf;
1443 if (local->ops->get_tsf)
1444 tsf = local->ops->get_tsf(local_to_hw(local));
1445 else
1446 tsf = -1LLU;
1447 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1448 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1449 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1450 "@%lu\n",
1451 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1452 (unsigned long long)tsf,
1453 (unsigned long long)timestamp,
1454 (unsigned long long)(tsf - timestamp),
1455 jiffies);
1456 last_tsf_debug = jiffies;
1457 }
1458 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1459 }
1460
1461 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1462 &elems) == ParseFailed)
1463 invalid = 1;
1464
1465 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1466 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1467 (sta = sta_info_get(local, mgmt->sa))) {
1468 struct ieee80211_hw_mode *mode;
1469 struct ieee80211_rate *rates;
1470 size_t num_rates;
1471 u32 supp_rates, prev_rates;
1472 int i, j;
1473
1474 mode = local->sta_scanning ?
1475 local->scan_hw_mode : local->oper_hw_mode;
1476 rates = mode->rates;
1477 num_rates = mode->num_rates;
1478
1479 supp_rates = 0;
1480 for (i = 0; i < elems.supp_rates_len +
1481 elems.ext_supp_rates_len; i++) {
1482 u8 rate = 0;
1483 int own_rate;
1484 if (i < elems.supp_rates_len)
1485 rate = elems.supp_rates[i];
1486 else if (elems.ext_supp_rates)
1487 rate = elems.ext_supp_rates
1488 [i - elems.supp_rates_len];
1489 own_rate = 5 * (rate & 0x7f);
1490 if (mode->mode == MODE_ATHEROS_TURBO)
1491 own_rate *= 2;
1492 for (j = 0; j < num_rates; j++)
1493 if (rates[j].rate == own_rate)
1494 supp_rates |= BIT(j);
1495 }
1496
1497 prev_rates = sta->supp_rates;
1498 sta->supp_rates &= supp_rates;
1499 if (sta->supp_rates == 0) {
1500 /* No matching rates - this should not really happen.
1501 * Make sure that at least one rate is marked
1502 * supported to avoid issues with TX rate ctrl. */
1503 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1504 }
1505 if (sta->supp_rates != prev_rates) {
1506 printk(KERN_DEBUG "%s: updated supp_rates set for "
1507 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1508 "0x%x)\n",
1509 dev->name, MAC_ARG(sta->addr), prev_rates,
1510 supp_rates, sta->supp_rates);
1511 }
1512 sta_info_put(sta);
1513 }
1514
1515 if (!elems.ssid)
1516 return;
1517
1518 if (elems.ds_params && elems.ds_params_len == 1)
1519 channel = elems.ds_params[0];
1520 else
1521 channel = rx_status->channel;
1522
1523 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1524 if (!bss) {
1525 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1526 if (!bss)
1527 return;
1528 } else {
1529 #if 0
1530 /* TODO: order by RSSI? */
1531 spin_lock_bh(&local->sta_bss_lock);
1532 list_move_tail(&bss->list, &local->sta_bss_list);
1533 spin_unlock_bh(&local->sta_bss_lock);
1534 #endif
1535 }
1536
1537 if (bss->probe_resp && beacon) {
1538 /* Do not allow beacon to override data from Probe Response. */
1539 ieee80211_rx_bss_put(dev, bss);
1540 return;
1541 }
1542
1543 /* save the ERP value so that it is available at association time */
1544 if (elems.erp_info && elems.erp_info_len >= 1) {
1545 bss->erp_value = elems.erp_info[0];
1546 bss->has_erp_value = 1;
1547 }
1548
1549 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1550 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1551 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1552 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1553 bss->ssid_len = elems.ssid_len;
1554 }
1555
1556 bss->supp_rates_len = 0;
1557 if (elems.supp_rates) {
1558 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1559 if (clen > elems.supp_rates_len)
1560 clen = elems.supp_rates_len;
1561 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1562 clen);
1563 bss->supp_rates_len += clen;
1564 }
1565 if (elems.ext_supp_rates) {
1566 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1567 if (clen > elems.ext_supp_rates_len)
1568 clen = elems.ext_supp_rates_len;
1569 memcpy(&bss->supp_rates[bss->supp_rates_len],
1570 elems.ext_supp_rates, clen);
1571 bss->supp_rates_len += clen;
1572 }
1573
1574 if (elems.wpa &&
1575 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1576 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1577 kfree(bss->wpa_ie);
1578 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1579 if (bss->wpa_ie) {
1580 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1581 bss->wpa_ie_len = elems.wpa_len + 2;
1582 } else
1583 bss->wpa_ie_len = 0;
1584 } else if (!elems.wpa && bss->wpa_ie) {
1585 kfree(bss->wpa_ie);
1586 bss->wpa_ie = NULL;
1587 bss->wpa_ie_len = 0;
1588 }
1589
1590 if (elems.rsn &&
1591 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1592 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1593 kfree(bss->rsn_ie);
1594 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1595 if (bss->rsn_ie) {
1596 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1597 bss->rsn_ie_len = elems.rsn_len + 2;
1598 } else
1599 bss->rsn_ie_len = 0;
1600 } else if (!elems.rsn && bss->rsn_ie) {
1601 kfree(bss->rsn_ie);
1602 bss->rsn_ie = NULL;
1603 bss->rsn_ie_len = 0;
1604 }
1605
1606 if (elems.wmm_param &&
1607 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1608 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1609 kfree(bss->wmm_ie);
1610 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1611 if (bss->wmm_ie) {
1612 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1613 elems.wmm_param_len + 2);
1614 bss->wmm_ie_len = elems.wmm_param_len + 2;
1615 } else
1616 bss->wmm_ie_len = 0;
1617 } else if (!elems.wmm_param && bss->wmm_ie) {
1618 kfree(bss->wmm_ie);
1619 bss->wmm_ie = NULL;
1620 bss->wmm_ie_len = 0;
1621 }
1622
1623
1624 bss->hw_mode = rx_status->phymode;
1625 bss->channel = channel;
1626 bss->freq = rx_status->freq;
1627 if (channel != rx_status->channel &&
1628 (bss->hw_mode == MODE_IEEE80211G ||
1629 bss->hw_mode == MODE_IEEE80211B) &&
1630 channel >= 1 && channel <= 14) {
1631 static const int freq_list[] = {
1632 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1633 2447, 2452, 2457, 2462, 2467, 2472, 2484
1634 };
1635 /* IEEE 802.11g/b mode can receive packets from neighboring
1636 * channels, so map the channel into frequency. */
1637 bss->freq = freq_list[channel - 1];
1638 }
1639 bss->timestamp = timestamp;
1640 bss->last_update = jiffies;
1641 bss->rssi = rx_status->ssi;
1642 bss->signal = rx_status->signal;
1643 bss->noise = rx_status->noise;
1644 if (!beacon)
1645 bss->probe_resp++;
1646 ieee80211_rx_bss_put(dev, bss);
1647 }
1648
1649
1650 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1651 struct ieee80211_mgmt *mgmt,
1652 size_t len,
1653 struct ieee80211_rx_status *rx_status)
1654 {
1655 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1656 }
1657
1658
1659 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1660 struct ieee80211_mgmt *mgmt,
1661 size_t len,
1662 struct ieee80211_rx_status *rx_status)
1663 {
1664 struct ieee80211_sub_if_data *sdata;
1665 struct ieee80211_if_sta *ifsta;
1666 size_t baselen;
1667 struct ieee802_11_elems elems;
1668
1669 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1670
1671 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1672 if (sdata->type != IEEE80211_IF_TYPE_STA)
1673 return;
1674 ifsta = &sdata->u.sta;
1675
1676 if (!ifsta->associated ||
1677 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1678 return;
1679
1680 /* Process beacon from the current BSS */
1681 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1682 if (baselen > len)
1683 return;
1684
1685 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1686 &elems) == ParseFailed)
1687 return;
1688
1689 if (elems.erp_info && elems.erp_info_len >= 1)
1690 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1691
1692 if (elems.wmm_param && ifsta->wmm_enabled) {
1693 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1694 elems.wmm_param_len);
1695 }
1696 }
1697
1698
1699 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1700 struct ieee80211_if_sta *ifsta,
1701 struct ieee80211_mgmt *mgmt,
1702 size_t len,
1703 struct ieee80211_rx_status *rx_status)
1704 {
1705 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1706 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1707 int tx_last_beacon;
1708 struct sk_buff *skb;
1709 struct ieee80211_mgmt *resp;
1710 u8 *pos, *end;
1711
1712 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1713 ifsta->state != IEEE80211_IBSS_JOINED ||
1714 len < 24 + 2 || !ifsta->probe_resp)
1715 return;
1716
1717 if (local->ops->tx_last_beacon)
1718 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1719 else
1720 tx_last_beacon = 1;
1721
1722 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1723 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1724 MAC_FMT " (tx_last_beacon=%d)\n",
1725 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1726 MAC_ARG(mgmt->bssid), tx_last_beacon);
1727 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1728
1729 if (!tx_last_beacon)
1730 return;
1731
1732 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1733 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1734 return;
1735
1736 end = ((u8 *) mgmt) + len;
1737 pos = mgmt->u.probe_req.variable;
1738 if (pos[0] != WLAN_EID_SSID ||
1739 pos + 2 + pos[1] > end) {
1740 if (net_ratelimit()) {
1741 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1742 "from " MAC_FMT "\n",
1743 dev->name, MAC_ARG(mgmt->sa));
1744 }
1745 return;
1746 }
1747 if (pos[1] != 0 &&
1748 (pos[1] != ifsta->ssid_len ||
1749 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1750 /* Ignore ProbeReq for foreign SSID */
1751 return;
1752 }
1753
1754 /* Reply with ProbeResp */
1755 skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1756 if (!skb)
1757 return;
1758
1759 resp = (struct ieee80211_mgmt *) skb->data;
1760 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1761 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1762 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1763 dev->name, MAC_ARG(resp->da));
1764 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1765 ieee80211_sta_tx(dev, skb, 0);
1766 }
1767
1768
1769 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1770 struct ieee80211_rx_status *rx_status)
1771 {
1772 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1773 struct ieee80211_sub_if_data *sdata;
1774 struct ieee80211_if_sta *ifsta;
1775 struct ieee80211_mgmt *mgmt;
1776 u16 fc;
1777
1778 if (skb->len < 24)
1779 goto fail;
1780
1781 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1782 ifsta = &sdata->u.sta;
1783
1784 mgmt = (struct ieee80211_mgmt *) skb->data;
1785 fc = le16_to_cpu(mgmt->frame_control);
1786
1787 switch (fc & IEEE80211_FCTL_STYPE) {
1788 case IEEE80211_STYPE_PROBE_REQ:
1789 case IEEE80211_STYPE_PROBE_RESP:
1790 case IEEE80211_STYPE_BEACON:
1791 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1792 case IEEE80211_STYPE_AUTH:
1793 case IEEE80211_STYPE_ASSOC_RESP:
1794 case IEEE80211_STYPE_REASSOC_RESP:
1795 case IEEE80211_STYPE_DEAUTH:
1796 case IEEE80211_STYPE_DISASSOC:
1797 skb_queue_tail(&ifsta->skb_queue, skb);
1798 queue_work(local->hw.workqueue, &ifsta->work);
1799 return;
1800 default:
1801 printk(KERN_DEBUG "%s: received unknown management frame - "
1802 "stype=%d\n", dev->name,
1803 (fc & IEEE80211_FCTL_STYPE) >> 4);
1804 break;
1805 }
1806
1807 fail:
1808 kfree_skb(skb);
1809 }
1810
1811
1812 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1813 struct sk_buff *skb)
1814 {
1815 struct ieee80211_rx_status *rx_status;
1816 struct ieee80211_sub_if_data *sdata;
1817 struct ieee80211_if_sta *ifsta;
1818 struct ieee80211_mgmt *mgmt;
1819 u16 fc;
1820
1821 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1822 ifsta = &sdata->u.sta;
1823
1824 rx_status = (struct ieee80211_rx_status *) skb->cb;
1825 mgmt = (struct ieee80211_mgmt *) skb->data;
1826 fc = le16_to_cpu(mgmt->frame_control);
1827
1828 switch (fc & IEEE80211_FCTL_STYPE) {
1829 case IEEE80211_STYPE_PROBE_REQ:
1830 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1831 rx_status);
1832 break;
1833 case IEEE80211_STYPE_PROBE_RESP:
1834 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1835 break;
1836 case IEEE80211_STYPE_BEACON:
1837 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1838 break;
1839 case IEEE80211_STYPE_AUTH:
1840 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1841 break;
1842 case IEEE80211_STYPE_ASSOC_RESP:
1843 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1844 break;
1845 case IEEE80211_STYPE_REASSOC_RESP:
1846 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1847 break;
1848 case IEEE80211_STYPE_DEAUTH:
1849 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1850 break;
1851 case IEEE80211_STYPE_DISASSOC:
1852 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1853 break;
1854 }
1855
1856 kfree_skb(skb);
1857 }
1858
1859
1860 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1861 struct ieee80211_rx_status *rx_status)
1862 {
1863 struct ieee80211_mgmt *mgmt;
1864 u16 fc;
1865
1866 if (skb->len < 24) {
1867 dev_kfree_skb(skb);
1868 return;
1869 }
1870
1871 mgmt = (struct ieee80211_mgmt *) skb->data;
1872 fc = le16_to_cpu(mgmt->frame_control);
1873
1874 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1875 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1876 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1877 skb->len, rx_status);
1878 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1879 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1880 rx_status);
1881 }
1882 }
1883
1884 dev_kfree_skb(skb);
1885 }
1886
1887
1888 static int ieee80211_sta_active_ibss(struct net_device *dev)
1889 {
1890 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1891 int active = 0;
1892 struct sta_info *sta;
1893
1894 spin_lock_bh(&local->sta_lock);
1895 list_for_each_entry(sta, &local->sta_list, list) {
1896 if (sta->dev == dev &&
1897 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1898 jiffies)) {
1899 active++;
1900 break;
1901 }
1902 }
1903 spin_unlock_bh(&local->sta_lock);
1904
1905 return active;
1906 }
1907
1908
1909 static void ieee80211_sta_expire(struct net_device *dev)
1910 {
1911 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1912 struct sta_info *sta, *tmp;
1913
1914 spin_lock_bh(&local->sta_lock);
1915 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1916 if (time_after(jiffies, sta->last_rx +
1917 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1918 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1919 "\n", dev->name, MAC_ARG(sta->addr));
1920 sta_info_free(sta, 1);
1921 }
1922 spin_unlock_bh(&local->sta_lock);
1923 }
1924
1925
1926 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1927 struct ieee80211_if_sta *ifsta)
1928 {
1929 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1930
1931 ieee80211_sta_expire(dev);
1932 if (ieee80211_sta_active_ibss(dev))
1933 return;
1934
1935 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1936 "IBSS networks with same SSID (merge)\n", dev->name);
1937 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1938 }
1939
1940
1941 void ieee80211_sta_timer(unsigned long data)
1942 {
1943 struct ieee80211_sub_if_data *sdata =
1944 (struct ieee80211_sub_if_data *) data;
1945 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1946 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1947
1948 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1949 queue_work(local->hw.workqueue, &ifsta->work);
1950 }
1951
1952
1953 void ieee80211_sta_work(struct work_struct *work)
1954 {
1955 struct ieee80211_sub_if_data *sdata =
1956 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1957 struct net_device *dev = sdata->dev;
1958 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1959 struct ieee80211_if_sta *ifsta;
1960 struct sk_buff *skb;
1961
1962 if (!netif_running(dev))
1963 return;
1964
1965 if (local->sta_scanning)
1966 return;
1967
1968 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1969 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1970 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1971 "(type=%d)\n", dev->name, sdata->type);
1972 return;
1973 }
1974 ifsta = &sdata->u.sta;
1975
1976 while ((skb = skb_dequeue(&ifsta->skb_queue)))
1977 ieee80211_sta_rx_queued_mgmt(dev, skb);
1978
1979 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1980 ifsta->state != IEEE80211_ASSOCIATE &&
1981 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1982 ieee80211_sta_start_scan(dev, NULL, 0);
1983 return;
1984 }
1985
1986 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1987 if (ieee80211_sta_config_auth(dev, ifsta))
1988 return;
1989 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1990 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1991 return;
1992
1993 switch (ifsta->state) {
1994 case IEEE80211_DISABLED:
1995 break;
1996 case IEEE80211_AUTHENTICATE:
1997 ieee80211_authenticate(dev, ifsta);
1998 break;
1999 case IEEE80211_ASSOCIATE:
2000 ieee80211_associate(dev, ifsta);
2001 break;
2002 case IEEE80211_ASSOCIATED:
2003 ieee80211_associated(dev, ifsta);
2004 break;
2005 case IEEE80211_IBSS_SEARCH:
2006 ieee80211_sta_find_ibss(dev, ifsta);
2007 break;
2008 case IEEE80211_IBSS_JOINED:
2009 ieee80211_sta_merge_ibss(dev, ifsta);
2010 break;
2011 default:
2012 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2013 ifsta->state);
2014 break;
2015 }
2016
2017 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2018 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2019 "mixed-cell disabled - disassociate\n", dev->name);
2020
2021 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2022 ieee80211_set_disassoc(dev, ifsta, 0);
2023 }
2024 }
2025
2026
2027 static void ieee80211_sta_reset_auth(struct net_device *dev,
2028 struct ieee80211_if_sta *ifsta)
2029 {
2030 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2031
2032 if (local->ops->reset_tsf) {
2033 /* Reset own TSF to allow time synchronization work. */
2034 local->ops->reset_tsf(local_to_hw(local));
2035 }
2036
2037 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2038
2039
2040 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2041 ifsta->auth_alg = WLAN_AUTH_OPEN;
2042 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2043 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2044 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2045 ifsta->auth_alg = WLAN_AUTH_LEAP;
2046 else
2047 ifsta->auth_alg = WLAN_AUTH_OPEN;
2048 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2049 ifsta->auth_alg);
2050 ifsta->auth_transaction = -1;
2051 ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2052 netif_carrier_off(dev);
2053 }
2054
2055
2056 void ieee80211_sta_req_auth(struct net_device *dev,
2057 struct ieee80211_if_sta *ifsta)
2058 {
2059 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2060 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2061
2062 if (sdata->type != IEEE80211_IF_TYPE_STA)
2063 return;
2064
2065 if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2066 (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2067 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2068 queue_work(local->hw.workqueue, &ifsta->work);
2069 }
2070 }
2071
2072 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2073 const char *ssid, int ssid_len)
2074 {
2075 int tmp, hidden_ssid;
2076
2077 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2078 return 1;
2079
2080 if (ifsta->auto_bssid_sel)
2081 return 0;
2082
2083 hidden_ssid = 1;
2084 tmp = ssid_len;
2085 while (tmp--) {
2086 if (ssid[tmp] != '\0') {
2087 hidden_ssid = 0;
2088 break;
2089 }
2090 }
2091
2092 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2093 return 1;
2094
2095 if (ssid_len == 1 && ssid[0] == ' ')
2096 return 1;
2097
2098 return 0;
2099 }
2100
2101 static int ieee80211_sta_config_auth(struct net_device *dev,
2102 struct ieee80211_if_sta *ifsta)
2103 {
2104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2105 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2106 struct ieee80211_sta_bss *bss, *selected = NULL;
2107 int top_rssi = 0, freq;
2108
2109 if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2110 !ifsta->auto_ssid_sel) {
2111 ifsta->state = IEEE80211_AUTHENTICATE;
2112 ieee80211_sta_reset_auth(dev, ifsta);
2113 return 0;
2114 }
2115
2116 spin_lock_bh(&local->sta_bss_lock);
2117 freq = local->oper_channel->freq;
2118 list_for_each_entry(bss, &local->sta_bss_list, list) {
2119 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2120 continue;
2121
2122 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2123 !!sdata->default_key)
2124 continue;
2125
2126 if (!ifsta->auto_channel_sel && bss->freq != freq)
2127 continue;
2128
2129 if (!ifsta->auto_bssid_sel &&
2130 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2131 continue;
2132
2133 if (!ifsta->auto_ssid_sel &&
2134 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2135 continue;
2136
2137 if (!selected || top_rssi < bss->rssi) {
2138 selected = bss;
2139 top_rssi = bss->rssi;
2140 }
2141 }
2142 if (selected)
2143 atomic_inc(&selected->users);
2144 spin_unlock_bh(&local->sta_bss_lock);
2145
2146 if (selected) {
2147 ieee80211_set_channel(local, -1, selected->freq);
2148 if (!ifsta->ssid_set)
2149 ieee80211_sta_set_ssid(dev, selected->ssid,
2150 selected->ssid_len);
2151 ieee80211_sta_set_bssid(dev, selected->bssid);
2152 ieee80211_rx_bss_put(dev, selected);
2153 ifsta->state = IEEE80211_AUTHENTICATE;
2154 ieee80211_sta_reset_auth(dev, ifsta);
2155 return 0;
2156 } else {
2157 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2158 ieee80211_sta_start_scan(dev, NULL, 0);
2159 ifsta->state = IEEE80211_AUTHENTICATE;
2160 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2161 } else
2162 ifsta->state = IEEE80211_DISABLED;
2163 }
2164 return -1;
2165 }
2166
2167 static int ieee80211_sta_join_ibss(struct net_device *dev,
2168 struct ieee80211_if_sta *ifsta,
2169 struct ieee80211_sta_bss *bss)
2170 {
2171 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2172 int res, rates, i, j;
2173 struct sk_buff *skb;
2174 struct ieee80211_mgmt *mgmt;
2175 struct ieee80211_tx_control control;
2176 struct ieee80211_rate *rate;
2177 struct ieee80211_hw_mode *mode;
2178 struct rate_control_extra extra;
2179 u8 *pos;
2180 struct ieee80211_sub_if_data *sdata;
2181
2182 /* Remove possible STA entries from other IBSS networks. */
2183 sta_info_flush(local, NULL);
2184
2185 if (local->ops->reset_tsf) {
2186 /* Reset own TSF to allow time synchronization work. */
2187 local->ops->reset_tsf(local_to_hw(local));
2188 }
2189 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2190 res = ieee80211_if_config(dev);
2191 if (res)
2192 return res;
2193
2194 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2195
2196 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2197 sdata->drop_unencrypted = bss->capability &
2198 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2199
2200 res = ieee80211_set_channel(local, -1, bss->freq);
2201
2202 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2203 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2204 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2205 local->hw.conf.freq);
2206 return -1;
2207 }
2208
2209 /* Set beacon template based on scan results */
2210 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2211 do {
2212 if (!skb)
2213 break;
2214
2215 skb_reserve(skb, local->hw.extra_tx_headroom);
2216
2217 mgmt = (struct ieee80211_mgmt *)
2218 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2219 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2220 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2221 IEEE80211_STYPE_BEACON);
2222 memset(mgmt->da, 0xff, ETH_ALEN);
2223 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2224 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2225 mgmt->u.beacon.beacon_int =
2226 cpu_to_le16(local->hw.conf.beacon_int);
2227 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2228
2229 pos = skb_put(skb, 2 + ifsta->ssid_len);
2230 *pos++ = WLAN_EID_SSID;
2231 *pos++ = ifsta->ssid_len;
2232 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2233
2234 rates = bss->supp_rates_len;
2235 if (rates > 8)
2236 rates = 8;
2237 pos = skb_put(skb, 2 + rates);
2238 *pos++ = WLAN_EID_SUPP_RATES;
2239 *pos++ = rates;
2240 memcpy(pos, bss->supp_rates, rates);
2241
2242 pos = skb_put(skb, 2 + 1);
2243 *pos++ = WLAN_EID_DS_PARAMS;
2244 *pos++ = 1;
2245 *pos++ = bss->channel;
2246
2247 pos = skb_put(skb, 2 + 2);
2248 *pos++ = WLAN_EID_IBSS_PARAMS;
2249 *pos++ = 2;
2250 /* FIX: set ATIM window based on scan results */
2251 *pos++ = 0;
2252 *pos++ = 0;
2253
2254 if (bss->supp_rates_len > 8) {
2255 rates = bss->supp_rates_len - 8;
2256 pos = skb_put(skb, 2 + rates);
2257 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2258 *pos++ = rates;
2259 memcpy(pos, &bss->supp_rates[8], rates);
2260 }
2261
2262 memset(&control, 0, sizeof(control));
2263 memset(&extra, 0, sizeof(extra));
2264 extra.mode = local->oper_hw_mode;
2265 rate = rate_control_get_rate(local, dev, skb, &extra);
2266 if (!rate) {
2267 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2268 "for IBSS beacon\n", dev->name);
2269 break;
2270 }
2271 control.tx_rate = (local->short_preamble &&
2272 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2273 rate->val2 : rate->val;
2274 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2275 control.power_level = local->hw.conf.power_level;
2276 control.flags |= IEEE80211_TXCTL_NO_ACK;
2277 control.retry_limit = 1;
2278
2279 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2280 if (ifsta->probe_resp) {
2281 mgmt = (struct ieee80211_mgmt *)
2282 ifsta->probe_resp->data;
2283 mgmt->frame_control =
2284 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2285 IEEE80211_STYPE_PROBE_RESP);
2286 } else {
2287 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2288 "template for IBSS\n", dev->name);
2289 }
2290
2291 if (local->ops->beacon_update &&
2292 local->ops->beacon_update(local_to_hw(local),
2293 skb, &control) == 0) {
2294 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2295 "template based on scan results\n", dev->name);
2296 skb = NULL;
2297 }
2298
2299 rates = 0;
2300 mode = local->oper_hw_mode;
2301 for (i = 0; i < bss->supp_rates_len; i++) {
2302 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2303 if (mode->mode == MODE_ATHEROS_TURBO)
2304 bitrate *= 2;
2305 for (j = 0; j < mode->num_rates; j++)
2306 if (mode->rates[j].rate == bitrate)
2307 rates |= BIT(j);
2308 }
2309 ifsta->supp_rates_bits = rates;
2310 } while (0);
2311
2312 if (skb) {
2313 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2314 "template\n", dev->name);
2315 dev_kfree_skb(skb);
2316 }
2317
2318 ifsta->state = IEEE80211_IBSS_JOINED;
2319 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2320
2321 ieee80211_rx_bss_put(dev, bss);
2322
2323 return res;
2324 }
2325
2326
2327 static int ieee80211_sta_create_ibss(struct net_device *dev,
2328 struct ieee80211_if_sta *ifsta)
2329 {
2330 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2331 struct ieee80211_sta_bss *bss;
2332 struct ieee80211_sub_if_data *sdata;
2333 struct ieee80211_hw_mode *mode;
2334 u8 bssid[ETH_ALEN], *pos;
2335 int i;
2336
2337 #if 0
2338 /* Easier testing, use fixed BSSID. */
2339 memset(bssid, 0xfe, ETH_ALEN);
2340 #else
2341 /* Generate random, not broadcast, locally administered BSSID. Mix in
2342 * own MAC address to make sure that devices that do not have proper
2343 * random number generator get different BSSID. */
2344 get_random_bytes(bssid, ETH_ALEN);
2345 for (i = 0; i < ETH_ALEN; i++)
2346 bssid[i] ^= dev->dev_addr[i];
2347 bssid[0] &= ~0x01;
2348 bssid[0] |= 0x02;
2349 #endif
2350
2351 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2352 dev->name, MAC_ARG(bssid));
2353
2354 bss = ieee80211_rx_bss_add(dev, bssid);
2355 if (!bss)
2356 return -ENOMEM;
2357
2358 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2359 mode = local->oper_hw_mode;
2360
2361 if (local->hw.conf.beacon_int == 0)
2362 local->hw.conf.beacon_int = 100;
2363 bss->beacon_int = local->hw.conf.beacon_int;
2364 bss->hw_mode = local->hw.conf.phymode;
2365 bss->channel = local->hw.conf.channel;
2366 bss->freq = local->hw.conf.freq;
2367 bss->last_update = jiffies;
2368 bss->capability = WLAN_CAPABILITY_IBSS;
2369 if (sdata->default_key) {
2370 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2371 } else
2372 sdata->drop_unencrypted = 0;
2373 bss->supp_rates_len = mode->num_rates;
2374 pos = bss->supp_rates;
2375 for (i = 0; i < mode->num_rates; i++) {
2376 int rate = mode->rates[i].rate;
2377 if (mode->mode == MODE_ATHEROS_TURBO)
2378 rate /= 2;
2379 *pos++ = (u8) (rate / 5);
2380 }
2381
2382 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2383 }
2384
2385
2386 static int ieee80211_sta_find_ibss(struct net_device *dev,
2387 struct ieee80211_if_sta *ifsta)
2388 {
2389 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2390 struct ieee80211_sta_bss *bss;
2391 int found = 0;
2392 u8 bssid[ETH_ALEN];
2393 int active_ibss;
2394
2395 if (ifsta->ssid_len == 0)
2396 return -EINVAL;
2397
2398 active_ibss = ieee80211_sta_active_ibss(dev);
2399 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2400 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2401 dev->name, active_ibss);
2402 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2403 spin_lock_bh(&local->sta_bss_lock);
2404 list_for_each_entry(bss, &local->sta_bss_list, list) {
2405 if (ifsta->ssid_len != bss->ssid_len ||
2406 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2407 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2408 continue;
2409 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2410 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2411 MAC_ARG(bss->bssid));
2412 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2413 memcpy(bssid, bss->bssid, ETH_ALEN);
2414 found = 1;
2415 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2416 break;
2417 }
2418 spin_unlock_bh(&local->sta_bss_lock);
2419
2420 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2421 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2422 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2423 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2424 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2425 (bss = ieee80211_rx_bss_get(dev, bssid))) {
2426 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2427 " based on configured SSID\n",
2428 dev->name, MAC_ARG(bssid));
2429 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2430 }
2431 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2432 printk(KERN_DEBUG " did not try to join ibss\n");
2433 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2434
2435 /* Selected IBSS not found in current scan results - try to scan */
2436 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2437 !ieee80211_sta_active_ibss(dev)) {
2438 mod_timer(&ifsta->timer, jiffies +
2439 IEEE80211_IBSS_MERGE_INTERVAL);
2440 } else if (time_after(jiffies, local->last_scan_completed +
2441 IEEE80211_SCAN_INTERVAL)) {
2442 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2443 "join\n", dev->name);
2444 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2445 ifsta->ssid_len);
2446 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2447 int interval = IEEE80211_SCAN_INTERVAL;
2448
2449 if (time_after(jiffies, ifsta->ibss_join_req +
2450 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2451 if (ifsta->create_ibss &&
2452 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2453 return ieee80211_sta_create_ibss(dev, ifsta);
2454 if (ifsta->create_ibss) {
2455 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2456 " configured channel %d (%d MHz)\n",
2457 dev->name, local->hw.conf.channel,
2458 local->hw.conf.freq);
2459 }
2460
2461 /* No IBSS found - decrease scan interval and continue
2462 * scanning. */
2463 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2464 }
2465
2466 ifsta->state = IEEE80211_IBSS_SEARCH;
2467 mod_timer(&ifsta->timer, jiffies + interval);
2468 return 0;
2469 }
2470
2471 return 0;
2472 }
2473
2474
2475 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2476 {
2477 struct ieee80211_sub_if_data *sdata;
2478 struct ieee80211_if_sta *ifsta;
2479 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2480
2481 if (len > IEEE80211_MAX_SSID_LEN)
2482 return -EINVAL;
2483
2484 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2485 * not defined. */
2486 if (local->ops->conf_tx) {
2487 struct ieee80211_tx_queue_params qparam;
2488 int i;
2489
2490 memset(&qparam, 0, sizeof(qparam));
2491 /* TODO: are these ok defaults for all hw_modes? */
2492 qparam.aifs = 2;
2493 qparam.cw_min =
2494 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2495 qparam.cw_max = 1023;
2496 qparam.burst_time = 0;
2497 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2498 {
2499 local->ops->conf_tx(local_to_hw(local),
2500 i + IEEE80211_TX_QUEUE_DATA0,
2501 &qparam);
2502 }
2503 /* IBSS uses different parameters for Beacon sending */
2504 qparam.cw_min++;
2505 qparam.cw_min *= 2;
2506 qparam.cw_min--;
2507 local->ops->conf_tx(local_to_hw(local),
2508 IEEE80211_TX_QUEUE_BEACON, &qparam);
2509 }
2510
2511 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2512 ifsta = &sdata->u.sta;
2513
2514 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2515 ifsta->prev_bssid_set = 0;
2516 memcpy(ifsta->ssid, ssid, len);
2517 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2518 ifsta->ssid_len = len;
2519
2520 ifsta->ssid_set = len ? 1 : 0;
2521 if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2522 ifsta->ibss_join_req = jiffies;
2523 ifsta->state = IEEE80211_IBSS_SEARCH;
2524 return ieee80211_sta_find_ibss(dev, ifsta);
2525 }
2526 return 0;
2527 }
2528
2529
2530 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2531 {
2532 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2533 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2534 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2535 *len = ifsta->ssid_len;
2536 return 0;
2537 }
2538
2539
2540 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2541 {
2542 struct ieee80211_sub_if_data *sdata;
2543 struct ieee80211_if_sta *ifsta;
2544 int res;
2545
2546 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2547 ifsta = &sdata->u.sta;
2548
2549 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2550 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2551 res = ieee80211_if_config(dev);
2552 if (res) {
2553 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2554 "the low-level driver\n", dev->name);
2555 return res;
2556 }
2557 }
2558
2559 if (!is_valid_ether_addr(bssid))
2560 ifsta->bssid_set = 0;
2561 else
2562 ifsta->bssid_set = 1;
2563 return 0;
2564 }
2565
2566
2567 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2568 struct ieee80211_sub_if_data *sdata,
2569 int powersave)
2570 {
2571 struct sk_buff *skb;
2572 struct ieee80211_hdr *nullfunc;
2573 u16 fc;
2574
2575 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2576 if (!skb) {
2577 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2578 "frame\n", sdata->dev->name);
2579 return;
2580 }
2581 skb_reserve(skb, local->hw.extra_tx_headroom);
2582
2583 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2584 memset(nullfunc, 0, 24);
2585 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2586 IEEE80211_FCTL_TODS;
2587 if (powersave)
2588 fc |= IEEE80211_FCTL_PM;
2589 nullfunc->frame_control = cpu_to_le16(fc);
2590 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2591 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2592 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2593
2594 ieee80211_sta_tx(sdata->dev, skb, 0);
2595 }
2596
2597
2598 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2599 {
2600 struct ieee80211_local *local = hw_to_local(hw);
2601 struct net_device *dev = local->scan_dev;
2602 struct ieee80211_sub_if_data *sdata;
2603 union iwreq_data wrqu;
2604
2605 local->last_scan_completed = jiffies;
2606 wmb();
2607 local->sta_scanning = 0;
2608
2609 if (ieee80211_hw_config(local))
2610 printk(KERN_DEBUG "%s: failed to restore operational"
2611 "channel after scan\n", dev->name);
2612
2613 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2614 ieee80211_if_config(dev))
2615 printk(KERN_DEBUG "%s: failed to restore operational"
2616 "BSSID after scan\n", dev->name);
2617
2618 memset(&wrqu, 0, sizeof(wrqu));
2619 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2620
2621 read_lock(&local->sub_if_lock);
2622 list_for_each_entry(sdata, &local->sub_if_list, list) {
2623
2624 /* No need to wake the master device. */
2625 if (sdata->dev == local->mdev)
2626 continue;
2627
2628 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2629 if (sdata->u.sta.associated)
2630 ieee80211_send_nullfunc(local, sdata, 0);
2631 ieee80211_sta_timer((unsigned long)sdata);
2632 }
2633
2634 netif_wake_queue(sdata->dev);
2635 }
2636 read_unlock(&local->sub_if_lock);
2637
2638 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2639 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2640 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2641 if (!ifsta->bssid_set ||
2642 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2643 !ieee80211_sta_active_ibss(dev)))
2644 ieee80211_sta_find_ibss(dev, ifsta);
2645 }
2646 }
2647 EXPORT_SYMBOL(ieee80211_scan_completed);
2648
2649 void ieee80211_sta_scan_work(struct work_struct *work)
2650 {
2651 struct ieee80211_local *local =
2652 container_of(work, struct ieee80211_local, scan_work.work);
2653 struct net_device *dev = local->scan_dev;
2654 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2655 struct ieee80211_hw_mode *mode;
2656 struct ieee80211_channel *chan;
2657 int skip;
2658 unsigned long next_delay = 0;
2659
2660 if (!local->sta_scanning)
2661 return;
2662
2663 switch (local->scan_state) {
2664 case SCAN_SET_CHANNEL:
2665 mode = local->scan_hw_mode;
2666 if (local->scan_hw_mode->list.next == &local->modes_list &&
2667 local->scan_channel_idx >= mode->num_channels) {
2668 ieee80211_scan_completed(local_to_hw(local));
2669 return;
2670 }
2671 skip = !(local->enabled_modes & (1 << mode->mode));
2672 chan = &mode->channels[local->scan_channel_idx];
2673 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2674 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2675 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2676 (local->hw_modes & local->enabled_modes &
2677 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2678 skip = 1;
2679
2680 if (!skip) {
2681 #if 0
2682 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2683 dev->name, chan->chan, chan->freq);
2684 #endif
2685
2686 local->scan_channel = chan;
2687 if (ieee80211_hw_config(local)) {
2688 printk(KERN_DEBUG "%s: failed to set channel "
2689 "%d (%d MHz) for scan\n", dev->name,
2690 chan->chan, chan->freq);
2691 skip = 1;
2692 }
2693 }
2694
2695 local->scan_channel_idx++;
2696 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2697 if (local->scan_hw_mode->list.next != &local->modes_list) {
2698 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2699 struct ieee80211_hw_mode,
2700 list);
2701 local->scan_channel_idx = 0;
2702 }
2703 }
2704
2705 if (skip)
2706 break;
2707
2708 next_delay = IEEE80211_PROBE_DELAY +
2709 usecs_to_jiffies(local->hw.channel_change_time);
2710 local->scan_state = SCAN_SEND_PROBE;
2711 break;
2712 case SCAN_SEND_PROBE:
2713 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2714 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2715 local->scan_ssid_len);
2716 next_delay = IEEE80211_CHANNEL_TIME;
2717 } else
2718 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2719 local->scan_state = SCAN_SET_CHANNEL;
2720 break;
2721 }
2722
2723 if (local->sta_scanning)
2724 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2725 next_delay);
2726 }
2727
2728
2729 static int ieee80211_sta_start_scan(struct net_device *dev,
2730 u8 *ssid, size_t ssid_len)
2731 {
2732 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2733 struct ieee80211_sub_if_data *sdata;
2734
2735 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2736 return -EINVAL;
2737
2738 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2739 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2740 * BSSID: MACAddress
2741 * SSID
2742 * ScanType: ACTIVE, PASSIVE
2743 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2744 * a Probe frame during active scanning
2745 * ChannelList
2746 * MinChannelTime (>= ProbeDelay), in TU
2747 * MaxChannelTime: (>= MinChannelTime), in TU
2748 */
2749
2750 /* MLME-SCAN.confirm
2751 * BSSDescriptionSet
2752 * ResultCode: SUCCESS, INVALID_PARAMETERS
2753 */
2754
2755 if (local->sta_scanning) {
2756 if (local->scan_dev == dev)
2757 return 0;
2758 return -EBUSY;
2759 }
2760
2761 if (local->ops->hw_scan) {
2762 int rc = local->ops->hw_scan(local_to_hw(local),
2763 ssid, ssid_len);
2764 if (!rc) {
2765 local->sta_scanning = 1;
2766 local->scan_dev = dev;
2767 }
2768 return rc;
2769 }
2770
2771 local->sta_scanning = 1;
2772
2773 read_lock(&local->sub_if_lock);
2774 list_for_each_entry(sdata, &local->sub_if_list, list) {
2775
2776 /* Don't stop the master interface, otherwise we can't transmit
2777 * probes! */
2778 if (sdata->dev == local->mdev)
2779 continue;
2780
2781 netif_stop_queue(sdata->dev);
2782 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2783 sdata->u.sta.associated)
2784 ieee80211_send_nullfunc(local, sdata, 1);
2785 }
2786 read_unlock(&local->sub_if_lock);
2787
2788 if (ssid) {
2789 local->scan_ssid_len = ssid_len;
2790 memcpy(local->scan_ssid, ssid, ssid_len);
2791 } else
2792 local->scan_ssid_len = 0;
2793 local->scan_state = SCAN_SET_CHANNEL;
2794 local->scan_hw_mode = list_entry(local->modes_list.next,
2795 struct ieee80211_hw_mode,
2796 list);
2797 local->scan_channel_idx = 0;
2798 local->scan_dev = dev;
2799
2800 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2801 ieee80211_if_config(dev))
2802 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2803 dev->name);
2804
2805 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2806 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2807 IEEE80211_CHANNEL_TIME);
2808
2809 return 0;
2810 }
2811
2812
2813 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2814 {
2815 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2816 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2817 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2818
2819 if (sdata->type != IEEE80211_IF_TYPE_STA)
2820 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2821
2822 if (local->sta_scanning) {
2823 if (local->scan_dev == dev)
2824 return 0;
2825 return -EBUSY;
2826 }
2827
2828 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2829 queue_work(local->hw.workqueue, &ifsta->work);
2830 return 0;
2831 }
2832
2833 static char *
2834 ieee80211_sta_scan_result(struct net_device *dev,
2835 struct ieee80211_sta_bss *bss,
2836 char *current_ev, char *end_buf)
2837 {
2838 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2839 struct iw_event iwe;
2840
2841 if (time_after(jiffies,
2842 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2843 return current_ev;
2844
2845 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2846 return current_ev;
2847
2848 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2849 !bss->wpa_ie && !bss->rsn_ie)
2850 return current_ev;
2851
2852 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2853 (local->scan_ssid_len != bss->ssid_len ||
2854 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2855 return current_ev;
2856
2857 memset(&iwe, 0, sizeof(iwe));
2858 iwe.cmd = SIOCGIWAP;
2859 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2860 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2861 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2862 IW_EV_ADDR_LEN);
2863
2864 memset(&iwe, 0, sizeof(iwe));
2865 iwe.cmd = SIOCGIWESSID;
2866 iwe.u.data.length = bss->ssid_len;
2867 iwe.u.data.flags = 1;
2868 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2869 bss->ssid);
2870
2871 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2872 memset(&iwe, 0, sizeof(iwe));
2873 iwe.cmd = SIOCGIWMODE;
2874 if (bss->capability & WLAN_CAPABILITY_ESS)
2875 iwe.u.mode = IW_MODE_MASTER;
2876 else
2877 iwe.u.mode = IW_MODE_ADHOC;
2878 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2879 IW_EV_UINT_LEN);
2880 }
2881
2882 memset(&iwe, 0, sizeof(iwe));
2883 iwe.cmd = SIOCGIWFREQ;
2884 iwe.u.freq.m = bss->channel;
2885 iwe.u.freq.e = 0;
2886 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2887 IW_EV_FREQ_LEN);
2888 iwe.u.freq.m = bss->freq * 100000;
2889 iwe.u.freq.e = 1;
2890 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2891 IW_EV_FREQ_LEN);
2892
2893 memset(&iwe, 0, sizeof(iwe));
2894 iwe.cmd = IWEVQUAL;
2895 iwe.u.qual.qual = bss->signal;
2896 iwe.u.qual.level = bss->rssi;
2897 iwe.u.qual.noise = bss->noise;
2898 iwe.u.qual.updated = local->wstats_flags;
2899 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2900 IW_EV_QUAL_LEN);
2901
2902 memset(&iwe, 0, sizeof(iwe));
2903 iwe.cmd = SIOCGIWENCODE;
2904 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2905 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2906 else
2907 iwe.u.data.flags = IW_ENCODE_DISABLED;
2908 iwe.u.data.length = 0;
2909 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2910
2911 if (bss && bss->wpa_ie) {
2912 memset(&iwe, 0, sizeof(iwe));
2913 iwe.cmd = IWEVGENIE;
2914 iwe.u.data.length = bss->wpa_ie_len;
2915 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2916 bss->wpa_ie);
2917 }
2918
2919 if (bss && bss->rsn_ie) {
2920 memset(&iwe, 0, sizeof(iwe));
2921 iwe.cmd = IWEVGENIE;
2922 iwe.u.data.length = bss->rsn_ie_len;
2923 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2924 bss->rsn_ie);
2925 }
2926
2927 if (bss && bss->supp_rates_len > 0) {
2928 /* display all supported rates in readable format */
2929 char *p = current_ev + IW_EV_LCP_LEN;
2930 int i;
2931
2932 memset(&iwe, 0, sizeof(iwe));
2933 iwe.cmd = SIOCGIWRATE;
2934 /* Those two flags are ignored... */
2935 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2936
2937 for (i = 0; i < bss->supp_rates_len; i++) {
2938 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2939 0x7f) * 500000);
2940 p = iwe_stream_add_value(current_ev, p,
2941 end_buf, &iwe, IW_EV_PARAM_LEN);
2942 }
2943 current_ev = p;
2944 }
2945
2946 if (bss) {
2947 char *buf;
2948 buf = kmalloc(30, GFP_ATOMIC);
2949 if (buf) {
2950 memset(&iwe, 0, sizeof(iwe));
2951 iwe.cmd = IWEVCUSTOM;
2952 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2953 iwe.u.data.length = strlen(buf);
2954 current_ev = iwe_stream_add_point(current_ev, end_buf,
2955 &iwe, buf);
2956 kfree(buf);
2957 }
2958 }
2959
2960 do {
2961 char *buf;
2962
2963 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2964 break;
2965
2966 buf = kmalloc(100, GFP_ATOMIC);
2967 if (!buf)
2968 break;
2969
2970 memset(&iwe, 0, sizeof(iwe));
2971 iwe.cmd = IWEVCUSTOM;
2972 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2973 iwe.u.data.length = strlen(buf);
2974 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2975 buf);
2976
2977 memset(&iwe, 0, sizeof(iwe));
2978 iwe.cmd = IWEVCUSTOM;
2979 sprintf(buf, "capab=0x%04x", bss->capability);
2980 iwe.u.data.length = strlen(buf);
2981 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2982 buf);
2983
2984 kfree(buf);
2985 break;
2986 } while (0);
2987
2988 return current_ev;
2989 }
2990
2991
2992 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2993 {
2994 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2995 char *current_ev = buf;
2996 char *end_buf = buf + len;
2997 struct ieee80211_sta_bss *bss;
2998
2999 spin_lock_bh(&local->sta_bss_lock);
3000 list_for_each_entry(bss, &local->sta_bss_list, list) {
3001 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3002 spin_unlock_bh(&local->sta_bss_lock);
3003 return -E2BIG;
3004 }
3005 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3006 end_buf);
3007 }
3008 spin_unlock_bh(&local->sta_bss_lock);
3009 return current_ev - buf;
3010 }
3011
3012
3013 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3014 {
3015 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3016 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3017 kfree(ifsta->extra_ie);
3018 if (len == 0) {
3019 ifsta->extra_ie = NULL;
3020 ifsta->extra_ie_len = 0;
3021 return 0;
3022 }
3023 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3024 if (!ifsta->extra_ie) {
3025 ifsta->extra_ie_len = 0;
3026 return -ENOMEM;
3027 }
3028 memcpy(ifsta->extra_ie, ie, len);
3029 ifsta->extra_ie_len = len;
3030 return 0;
3031 }
3032
3033
3034 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3035 struct sk_buff *skb, u8 *bssid,
3036 u8 *addr)
3037 {
3038 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3039 struct sta_info *sta;
3040 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3041
3042 /* TODO: Could consider removing the least recently used entry and
3043 * allow new one to be added. */
3044 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3045 if (net_ratelimit()) {
3046 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3047 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3048 }
3049 return NULL;
3050 }
3051
3052 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3053 local->mdev->name, MAC_ARG(addr), dev->name);
3054
3055 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3056 if (!sta)
3057 return NULL;
3058
3059 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3060
3061 rate_control_rate_init(sta, local);
3062
3063 return sta; /* caller will call sta_info_put() */
3064 }
3065
3066
3067 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3068 {
3069 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3070 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3071
3072 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3073 dev->name, reason);
3074
3075 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3076 sdata->type != IEEE80211_IF_TYPE_IBSS)
3077 return -EINVAL;
3078
3079 ieee80211_send_deauth(dev, ifsta, reason);
3080 ieee80211_set_disassoc(dev, ifsta, 1);
3081 return 0;
3082 }
3083
3084
3085 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3086 {
3087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3088 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3089
3090 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3091 dev->name, reason);
3092
3093 if (sdata->type != IEEE80211_IF_TYPE_STA)
3094 return -EINVAL;
3095
3096 if (!ifsta->associated)
3097 return -1;
3098
3099 ieee80211_send_disassoc(dev, ifsta, reason);
3100 ieee80211_set_disassoc(dev, ifsta, 0);
3101 return 0;
3102 }
Verdex Pro support