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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / net / mac80211 / ieee80211_sta.c
blob40e8b598dda71eb2c09aaa1f0405ccc8779df817
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 <linux/rtnetlink.h>
29 #include <net/iw_handler.h>
30 #include <asm/types.h>
31
32 #include <net/mac80211.h>
33 #include "ieee80211_i.h"
34 #include "ieee80211_rate.h"
35 #include "hostapd_ioctl.h"
36
37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_MAX_TRIES 3
41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
43 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
44 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
45 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
46 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
47
48 #define IEEE80211_PROBE_DELAY (HZ / 33)
49 #define IEEE80211_CHANNEL_TIME (HZ / 33)
50 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
51 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
52 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
53 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
54
55 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
56
57
58 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
59
60 #define ERP_INFO_USE_PROTECTION BIT(1)
61
62 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
63 u8 *ssid, size_t ssid_len);
64 static struct ieee80211_sta_bss *
65 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid);
66 static void ieee80211_rx_bss_put(struct net_device *dev,
67 struct ieee80211_sta_bss *bss);
68 static int ieee80211_sta_find_ibss(struct net_device *dev,
69 struct ieee80211_if_sta *ifsta);
70 static int ieee80211_sta_wep_configured(struct net_device *dev);
71 static int ieee80211_sta_start_scan(struct net_device *dev,
72 u8 *ssid, size_t ssid_len);
73 static int ieee80211_sta_config_auth(struct net_device *dev,
74 struct ieee80211_if_sta *ifsta);
75
76
77 /* Parsed Information Elements */
78 struct ieee802_11_elems {
79 u8 *ssid;
80 u8 ssid_len;
81 u8 *supp_rates;
82 u8 supp_rates_len;
83 u8 *fh_params;
84 u8 fh_params_len;
85 u8 *ds_params;
86 u8 ds_params_len;
87 u8 *cf_params;
88 u8 cf_params_len;
89 u8 *tim;
90 u8 tim_len;
91 u8 *ibss_params;
92 u8 ibss_params_len;
93 u8 *challenge;
94 u8 challenge_len;
95 u8 *wpa;
96 u8 wpa_len;
97 u8 *rsn;
98 u8 rsn_len;
99 u8 *erp_info;
100 u8 erp_info_len;
101 u8 *ext_supp_rates;
102 u8 ext_supp_rates_len;
103 u8 *wmm_info;
104 u8 wmm_info_len;
105 u8 *wmm_param;
106 u8 wmm_param_len;
107 };
108
109 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
110
111
112 static ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
113 struct ieee802_11_elems *elems)
114 {
115 size_t left = len;
116 u8 *pos = start;
117 int unknown = 0;
118
119 memset(elems, 0, sizeof(*elems));
120
121 while (left >= 2) {
122 u8 id, elen;
123
124 id = *pos++;
125 elen = *pos++;
126 left -= 2;
127
128 if (elen > left) {
129 #if 0
130 if (net_ratelimit())
131 printk(KERN_DEBUG "IEEE 802.11 element parse "
132 "failed (id=%d elen=%d left=%d)\n",
133 id, elen, left);
134 #endif
135 return ParseFailed;
136 }
137
138 switch (id) {
139 case WLAN_EID_SSID:
140 elems->ssid = pos;
141 elems->ssid_len = elen;
142 break;
143 case WLAN_EID_SUPP_RATES:
144 elems->supp_rates = pos;
145 elems->supp_rates_len = elen;
146 break;
147 case WLAN_EID_FH_PARAMS:
148 elems->fh_params = pos;
149 elems->fh_params_len = elen;
150 break;
151 case WLAN_EID_DS_PARAMS:
152 elems->ds_params = pos;
153 elems->ds_params_len = elen;
154 break;
155 case WLAN_EID_CF_PARAMS:
156 elems->cf_params = pos;
157 elems->cf_params_len = elen;
158 break;
159 case WLAN_EID_TIM:
160 elems->tim = pos;
161 elems->tim_len = elen;
162 break;
163 case WLAN_EID_IBSS_PARAMS:
164 elems->ibss_params = pos;
165 elems->ibss_params_len = elen;
166 break;
167 case WLAN_EID_CHALLENGE:
168 elems->challenge = pos;
169 elems->challenge_len = elen;
170 break;
171 case WLAN_EID_WPA:
172 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
173 pos[2] == 0xf2) {
174 /* Microsoft OUI (00:50:F2) */
175 if (pos[3] == 1) {
176 /* OUI Type 1 - WPA IE */
177 elems->wpa = pos;
178 elems->wpa_len = elen;
179 } else if (elen >= 5 && pos[3] == 2) {
180 if (pos[4] == 0) {
181 elems->wmm_info = pos;
182 elems->wmm_info_len = elen;
183 } else if (pos[4] == 1) {
184 elems->wmm_param = pos;
185 elems->wmm_param_len = elen;
186 }
187 }
188 }
189 break;
190 case WLAN_EID_RSN:
191 elems->rsn = pos;
192 elems->rsn_len = elen;
193 break;
194 case WLAN_EID_ERP_INFO:
195 elems->erp_info = pos;
196 elems->erp_info_len = elen;
197 break;
198 case WLAN_EID_EXT_SUPP_RATES:
199 elems->ext_supp_rates = pos;
200 elems->ext_supp_rates_len = elen;
201 break;
202 default:
203 #if 0
204 printk(KERN_DEBUG "IEEE 802.11 element parse ignored "
205 "unknown element (id=%d elen=%d)\n",
206 id, elen);
207 #endif
208 unknown++;
209 break;
210 }
211
212 left -= elen;
213 pos += elen;
214 }
215
216 /* Do not trigger error if left == 1 as Apple Airport base stations
217 * send AssocResps that are one spurious byte too long. */
218
219 return unknown ? ParseUnknown : ParseOK;
220 }
221
222
223
224
225 static int ecw2cw(int ecw)
226 {
227 int cw = 1;
228 while (ecw > 0) {
229 cw <<= 1;
230 ecw--;
231 }
232 return cw - 1;
233 }
234
235
236 static void ieee80211_sta_wmm_params(struct net_device *dev,
237 struct ieee80211_if_sta *ifsta,
238 u8 *wmm_param, size_t wmm_param_len)
239 {
240 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
241 struct ieee80211_tx_queue_params params;
242 size_t left;
243 int count;
244 u8 *pos;
245
246 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
247 return;
248 count = wmm_param[6] & 0x0f;
249 if (count == ifsta->wmm_last_param_set)
250 return;
251 ifsta->wmm_last_param_set = count;
252
253 pos = wmm_param + 8;
254 left = wmm_param_len - 8;
255
256 memset(&params, 0, sizeof(params));
257
258 if (!local->ops->conf_tx)
259 return;
260
261 local->wmm_acm = 0;
262 for (; left >= 4; left -= 4, pos += 4) {
263 int aci = (pos[0] >> 5) & 0x03;
264 int acm = (pos[0] >> 4) & 0x01;
265 int queue;
266
267 switch (aci) {
268 case 1:
269 queue = IEEE80211_TX_QUEUE_DATA3;
270 if (acm) {
271 local->wmm_acm |= BIT(0) | BIT(3);
272 }
273 break;
274 case 2:
275 queue = IEEE80211_TX_QUEUE_DATA1;
276 if (acm) {
277 local->wmm_acm |= BIT(4) | BIT(5);
278 }
279 break;
280 case 3:
281 queue = IEEE80211_TX_QUEUE_DATA0;
282 if (acm) {
283 local->wmm_acm |= BIT(6) | BIT(7);
284 }
285 break;
286 case 0:
287 default:
288 queue = IEEE80211_TX_QUEUE_DATA2;
289 if (acm) {
290 local->wmm_acm |= BIT(1) | BIT(2);
291 }
292 break;
293 }
294
295 params.aifs = pos[0] & 0x0f;
296 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
297 params.cw_min = ecw2cw(pos[1] & 0x0f);
298 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
299 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
300 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
301 "cWmin=%d cWmax=%d burst=%d\n",
302 dev->name, queue, aci, acm, params.aifs, params.cw_min,
303 params.cw_max, params.burst_time);
304 /* TODO: handle ACM (block TX, fallback to next lowest allowed
305 * AC for now) */
306 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
307 printk(KERN_DEBUG "%s: failed to set TX queue "
308 "parameters for queue %d\n", dev->name, queue);
309 }
310 }
311 }
312
313
314 static void ieee80211_sta_send_associnfo(struct net_device *dev,
315 struct ieee80211_if_sta *ifsta)
316 {
317 char *buf;
318 size_t len;
319 int i;
320 union iwreq_data wrqu;
321
322 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
323 return;
324
325 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
326 ifsta->assocresp_ies_len), GFP_ATOMIC);
327 if (!buf)
328 return;
329
330 len = sprintf(buf, "ASSOCINFO(");
331 if (ifsta->assocreq_ies) {
332 len += sprintf(buf + len, "ReqIEs=");
333 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
334 len += sprintf(buf + len, "%02x",
335 ifsta->assocreq_ies[i]);
336 }
337 }
338 if (ifsta->assocresp_ies) {
339 if (ifsta->assocreq_ies)
340 len += sprintf(buf + len, " ");
341 len += sprintf(buf + len, "RespIEs=");
342 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
343 len += sprintf(buf + len, "%02x",
344 ifsta->assocresp_ies[i]);
345 }
346 }
347 len += sprintf(buf + len, ")");
348
349 if (len > IW_CUSTOM_MAX) {
350 len = sprintf(buf, "ASSOCRESPIE=");
351 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
352 len += sprintf(buf + len, "%02x",
353 ifsta->assocresp_ies[i]);
354 }
355 }
356
357 memset(&wrqu, 0, sizeof(wrqu));
358 wrqu.data.length = len;
359 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
360
361 kfree(buf);
362 }
363
364
365 static void ieee80211_set_associated(struct net_device *dev,
366 struct ieee80211_if_sta *ifsta, int assoc)
367 {
368 union iwreq_data wrqu;
369
370 if (ifsta->associated == assoc)
371 return;
372
373 ifsta->associated = assoc;
374
375 if (assoc) {
376 struct ieee80211_sub_if_data *sdata;
377 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
378 if (sdata->type != IEEE80211_IF_TYPE_STA)
379 return;
380 netif_carrier_on(dev);
381 ifsta->prev_bssid_set = 1;
382 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
383 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
384 ieee80211_sta_send_associnfo(dev, ifsta);
385 } else {
386 netif_carrier_off(dev);
387 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
388 }
389 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
390 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
391 ifsta->last_probe = jiffies;
392 }
393
394 static void ieee80211_set_disassoc(struct net_device *dev,
395 struct ieee80211_if_sta *ifsta, int deauth)
396 {
397 if (deauth)
398 ifsta->auth_tries = 0;
399 ifsta->assoc_tries = 0;
400 ieee80211_set_associated(dev, ifsta, 0);
401 }
402
403 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
404 int encrypt)
405 {
406 struct ieee80211_sub_if_data *sdata;
407 struct ieee80211_tx_packet_data *pkt_data;
408
409 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
410 skb->dev = sdata->local->mdev;
411 skb_set_mac_header(skb, 0);
412 skb_set_network_header(skb, 0);
413 skb_set_transport_header(skb, 0);
414
415 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
416 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
417 pkt_data->ifindex = sdata->dev->ifindex;
418 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
419 pkt_data->do_not_encrypt = !encrypt;
420
421 dev_queue_xmit(skb);
422 }
423
424
425 static void ieee80211_send_auth(struct net_device *dev,
426 struct ieee80211_if_sta *ifsta,
427 int transaction, u8 *extra, size_t extra_len,
428 int encrypt)
429 {
430 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
431 struct sk_buff *skb;
432 struct ieee80211_mgmt *mgmt;
433
434 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
435 sizeof(*mgmt) + 6 + extra_len);
436 if (!skb) {
437 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
438 "frame\n", dev->name);
439 return;
440 }
441 skb_reserve(skb, local->hw.extra_tx_headroom);
442
443 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
444 memset(mgmt, 0, 24 + 6);
445 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
446 IEEE80211_STYPE_AUTH);
447 if (encrypt)
448 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
449 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
450 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
451 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
452 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
453 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
454 ifsta->auth_transaction = transaction + 1;
455 mgmt->u.auth.status_code = cpu_to_le16(0);
456 if (extra)
457 memcpy(skb_put(skb, extra_len), extra, extra_len);
458
459 ieee80211_sta_tx(dev, skb, encrypt);
460 }
461
462
463 static void ieee80211_authenticate(struct net_device *dev,
464 struct ieee80211_if_sta *ifsta)
465 {
466 ifsta->auth_tries++;
467 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
468 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
469 " timed out\n",
470 dev->name, MAC_ARG(ifsta->bssid));
471 ifsta->state = IEEE80211_DISABLED;
472 return;
473 }
474
475 ifsta->state = IEEE80211_AUTHENTICATE;
476 printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
477 dev->name, MAC_ARG(ifsta->bssid));
478
479 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
480
481 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
482 }
483
484
485 static void ieee80211_send_assoc(struct net_device *dev,
486 struct ieee80211_if_sta *ifsta)
487 {
488 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
489 struct ieee80211_hw_mode *mode;
490 struct sk_buff *skb;
491 struct ieee80211_mgmt *mgmt;
492 u8 *pos, *ies;
493 int i, len;
494 u16 capab;
495 struct ieee80211_sta_bss *bss;
496 int wmm = 0;
497
498 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
499 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
500 ifsta->ssid_len);
501 if (!skb) {
502 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
503 "frame\n", dev->name);
504 return;
505 }
506 skb_reserve(skb, local->hw.extra_tx_headroom);
507
508 mode = local->oper_hw_mode;
509 capab = ifsta->capab;
510 if (mode->mode == MODE_IEEE80211G) {
511 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
512 WLAN_CAPABILITY_SHORT_PREAMBLE;
513 }
514 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
515 if (bss) {
516 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
517 capab |= WLAN_CAPABILITY_PRIVACY;
518 if (bss->wmm_ie) {
519 wmm = 1;
520 }
521 ieee80211_rx_bss_put(dev, bss);
522 }
523
524 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
525 memset(mgmt, 0, 24);
526 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
527 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
528 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
529
530 if (ifsta->prev_bssid_set) {
531 skb_put(skb, 10);
532 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
533 IEEE80211_STYPE_REASSOC_REQ);
534 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
535 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
536 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
537 ETH_ALEN);
538 } else {
539 skb_put(skb, 4);
540 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
541 IEEE80211_STYPE_ASSOC_REQ);
542 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
543 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
544 }
545
546 /* SSID */
547 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
548 *pos++ = WLAN_EID_SSID;
549 *pos++ = ifsta->ssid_len;
550 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
551
552 len = mode->num_rates;
553 if (len > 8)
554 len = 8;
555 pos = skb_put(skb, len + 2);
556 *pos++ = WLAN_EID_SUPP_RATES;
557 *pos++ = len;
558 for (i = 0; i < len; i++) {
559 int rate = mode->rates[i].rate;
560 if (mode->mode == MODE_ATHEROS_TURBO)
561 rate /= 2;
562 *pos++ = (u8) (rate / 5);
563 }
564
565 if (mode->num_rates > len) {
566 pos = skb_put(skb, mode->num_rates - len + 2);
567 *pos++ = WLAN_EID_EXT_SUPP_RATES;
568 *pos++ = mode->num_rates - len;
569 for (i = len; i < mode->num_rates; i++) {
570 int rate = mode->rates[i].rate;
571 if (mode->mode == MODE_ATHEROS_TURBO)
572 rate /= 2;
573 *pos++ = (u8) (rate / 5);
574 }
575 }
576
577 if (ifsta->extra_ie) {
578 pos = skb_put(skb, ifsta->extra_ie_len);
579 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
580 }
581
582 if (wmm && ifsta->wmm_enabled) {
583 pos = skb_put(skb, 9);
584 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
585 *pos++ = 7; /* len */
586 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
587 *pos++ = 0x50;
588 *pos++ = 0xf2;
589 *pos++ = 2; /* WME */
590 *pos++ = 0; /* WME info */
591 *pos++ = 1; /* WME ver */
592 *pos++ = 0;
593 }
594
595 kfree(ifsta->assocreq_ies);
596 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
597 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
598 if (ifsta->assocreq_ies)
599 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
600
601 ieee80211_sta_tx(dev, skb, 0);
602 }
603
604
605 static void ieee80211_send_deauth(struct net_device *dev,
606 struct ieee80211_if_sta *ifsta, u16 reason)
607 {
608 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
609 struct sk_buff *skb;
610 struct ieee80211_mgmt *mgmt;
611
612 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
613 if (!skb) {
614 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
615 "frame\n", dev->name);
616 return;
617 }
618 skb_reserve(skb, local->hw.extra_tx_headroom);
619
620 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
621 memset(mgmt, 0, 24);
622 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
623 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
624 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
625 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
626 IEEE80211_STYPE_DEAUTH);
627 skb_put(skb, 2);
628 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
629
630 ieee80211_sta_tx(dev, skb, 0);
631 }
632
633
634 static void ieee80211_send_disassoc(struct net_device *dev,
635 struct ieee80211_if_sta *ifsta, u16 reason)
636 {
637 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
638 struct sk_buff *skb;
639 struct ieee80211_mgmt *mgmt;
640
641 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
642 if (!skb) {
643 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
644 "frame\n", dev->name);
645 return;
646 }
647 skb_reserve(skb, local->hw.extra_tx_headroom);
648
649 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
650 memset(mgmt, 0, 24);
651 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
652 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
653 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
654 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
655 IEEE80211_STYPE_DISASSOC);
656 skb_put(skb, 2);
657 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
658
659 ieee80211_sta_tx(dev, skb, 0);
660 }
661
662
663 static int ieee80211_privacy_mismatch(struct net_device *dev,
664 struct ieee80211_if_sta *ifsta)
665 {
666 struct ieee80211_sta_bss *bss;
667 int res = 0;
668
669 if (!ifsta || ifsta->mixed_cell ||
670 ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
671 return 0;
672
673 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
674 if (!bss)
675 return 0;
676
677 if (ieee80211_sta_wep_configured(dev) !=
678 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
679 res = 1;
680
681 ieee80211_rx_bss_put(dev, bss);
682
683 return res;
684 }
685
686
687 static void ieee80211_associate(struct net_device *dev,
688 struct ieee80211_if_sta *ifsta)
689 {
690 ifsta->assoc_tries++;
691 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
692 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
693 " timed out\n",
694 dev->name, MAC_ARG(ifsta->bssid));
695 ifsta->state = IEEE80211_DISABLED;
696 return;
697 }
698
699 ifsta->state = IEEE80211_ASSOCIATE;
700 printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
701 dev->name, MAC_ARG(ifsta->bssid));
702 if (ieee80211_privacy_mismatch(dev, ifsta)) {
703 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
704 "mixed-cell disabled - abort association\n", dev->name);
705 ifsta->state = IEEE80211_DISABLED;
706 return;
707 }
708
709 ieee80211_send_assoc(dev, ifsta);
710
711 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
712 }
713
714
715 static void ieee80211_associated(struct net_device *dev,
716 struct ieee80211_if_sta *ifsta)
717 {
718 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
719 struct sta_info *sta;
720 int disassoc;
721
722 /* TODO: start monitoring current AP signal quality and number of
723 * missed beacons. Scan other channels every now and then and search
724 * for better APs. */
725 /* TODO: remove expired BSSes */
726
727 ifsta->state = IEEE80211_ASSOCIATED;
728
729 sta = sta_info_get(local, ifsta->bssid);
730 if (!sta) {
731 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
732 dev->name, MAC_ARG(ifsta->bssid));
733 disassoc = 1;
734 } else {
735 disassoc = 0;
736 if (time_after(jiffies,
737 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
738 if (ifsta->probereq_poll) {
739 printk(KERN_DEBUG "%s: No ProbeResp from "
740 "current AP " MAC_FMT " - assume out of "
741 "range\n",
742 dev->name, MAC_ARG(ifsta->bssid));
743 disassoc = 1;
744 sta_info_free(sta, 0);
745 ifsta->probereq_poll = 0;
746 } else {
747 ieee80211_send_probe_req(dev, ifsta->bssid,
748 local->scan_ssid,
749 local->scan_ssid_len);
750 ifsta->probereq_poll = 1;
751 }
752 } else {
753 ifsta->probereq_poll = 0;
754 if (time_after(jiffies, ifsta->last_probe +
755 IEEE80211_PROBE_INTERVAL)) {
756 ifsta->last_probe = jiffies;
757 ieee80211_send_probe_req(dev, ifsta->bssid,
758 ifsta->ssid,
759 ifsta->ssid_len);
760 }
761 }
762 sta_info_put(sta);
763 }
764 if (disassoc) {
765 union iwreq_data wrqu;
766 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
767 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
768 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
769 mod_timer(&ifsta->timer, jiffies +
770 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
771 } else {
772 mod_timer(&ifsta->timer, jiffies +
773 IEEE80211_MONITORING_INTERVAL);
774 }
775 }
776
777
778 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
779 u8 *ssid, size_t ssid_len)
780 {
781 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
782 struct ieee80211_hw_mode *mode;
783 struct sk_buff *skb;
784 struct ieee80211_mgmt *mgmt;
785 u8 *pos, *supp_rates, *esupp_rates = NULL;
786 int i;
787
788 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
789 if (!skb) {
790 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
791 "request\n", dev->name);
792 return;
793 }
794 skb_reserve(skb, local->hw.extra_tx_headroom);
795
796 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
797 memset(mgmt, 0, 24);
798 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
799 IEEE80211_STYPE_PROBE_REQ);
800 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
801 if (dst) {
802 memcpy(mgmt->da, dst, ETH_ALEN);
803 memcpy(mgmt->bssid, dst, ETH_ALEN);
804 } else {
805 memset(mgmt->da, 0xff, ETH_ALEN);
806 memset(mgmt->bssid, 0xff, ETH_ALEN);
807 }
808 pos = skb_put(skb, 2 + ssid_len);
809 *pos++ = WLAN_EID_SSID;
810 *pos++ = ssid_len;
811 memcpy(pos, ssid, ssid_len);
812
813 supp_rates = skb_put(skb, 2);
814 supp_rates[0] = WLAN_EID_SUPP_RATES;
815 supp_rates[1] = 0;
816 mode = local->oper_hw_mode;
817 for (i = 0; i < mode->num_rates; i++) {
818 struct ieee80211_rate *rate = &mode->rates[i];
819 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
820 continue;
821 if (esupp_rates) {
822 pos = skb_put(skb, 1);
823 esupp_rates[1]++;
824 } else if (supp_rates[1] == 8) {
825 esupp_rates = skb_put(skb, 3);
826 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
827 esupp_rates[1] = 1;
828 pos = &esupp_rates[2];
829 } else {
830 pos = skb_put(skb, 1);
831 supp_rates[1]++;
832 }
833 if (mode->mode == MODE_ATHEROS_TURBO)
834 *pos = rate->rate / 10;
835 else
836 *pos = rate->rate / 5;
837 }
838
839 ieee80211_sta_tx(dev, skb, 0);
840 }
841
842
843 static int ieee80211_sta_wep_configured(struct net_device *dev)
844 {
845 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
846 if (!sdata || !sdata->default_key ||
847 sdata->default_key->alg != ALG_WEP)
848 return 0;
849 return 1;
850 }
851
852
853 static void ieee80211_auth_completed(struct net_device *dev,
854 struct ieee80211_if_sta *ifsta)
855 {
856 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
857 ifsta->authenticated = 1;
858 ieee80211_associate(dev, ifsta);
859 }
860
861
862 static void ieee80211_auth_challenge(struct net_device *dev,
863 struct ieee80211_if_sta *ifsta,
864 struct ieee80211_mgmt *mgmt,
865 size_t len)
866 {
867 u8 *pos;
868 struct ieee802_11_elems elems;
869
870 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
871 pos = mgmt->u.auth.variable;
872 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
873 == ParseFailed) {
874 printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
875 dev->name);
876 return;
877 }
878 if (!elems.challenge) {
879 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
880 "frame\n", dev->name);
881 return;
882 }
883 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
884 elems.challenge_len + 2, 1);
885 }
886
887
888 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
889 struct ieee80211_if_sta *ifsta,
890 struct ieee80211_mgmt *mgmt,
891 size_t len)
892 {
893 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
894 u16 auth_alg, auth_transaction, status_code;
895
896 if (ifsta->state != IEEE80211_AUTHENTICATE &&
897 sdata->type != IEEE80211_IF_TYPE_IBSS) {
898 printk(KERN_DEBUG "%s: authentication frame received from "
899 MAC_FMT ", but not in authenticate state - ignored\n",
900 dev->name, MAC_ARG(mgmt->sa));
901 return;
902 }
903
904 if (len < 24 + 6) {
905 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
906 "received from " MAC_FMT " - ignored\n",
907 dev->name, len, MAC_ARG(mgmt->sa));
908 return;
909 }
910
911 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
912 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
913 printk(KERN_DEBUG "%s: authentication frame received from "
914 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
915 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
916 MAC_ARG(mgmt->bssid));
917 return;
918 }
919
920 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
921 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
922 printk(KERN_DEBUG "%s: authentication frame received from "
923 "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
924 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
925 MAC_ARG(mgmt->bssid));
926 return;
927 }
928
929 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
930 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
931 status_code = le16_to_cpu(mgmt->u.auth.status_code);
932
933 printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
934 "transaction=%d status=%d)\n",
935 dev->name, MAC_ARG(mgmt->sa), auth_alg,
936 auth_transaction, status_code);
937
938 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
939 /* IEEE 802.11 standard does not require authentication in IBSS
940 * networks and most implementations do not seem to use it.
941 * However, try to reply to authentication attempts if someone
942 * has actually implemented this.
943 * TODO: Could implement shared key authentication. */
944 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
945 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
946 "frame (alg=%d transaction=%d)\n",
947 dev->name, auth_alg, auth_transaction);
948 return;
949 }
950 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
951 }
952
953 if (auth_alg != ifsta->auth_alg ||
954 auth_transaction != ifsta->auth_transaction) {
955 printk(KERN_DEBUG "%s: unexpected authentication frame "
956 "(alg=%d transaction=%d)\n",
957 dev->name, auth_alg, auth_transaction);
958 return;
959 }
960
961 if (status_code != WLAN_STATUS_SUCCESS) {
962 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
963 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
964 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
965 u8 algs[3];
966 const int num_algs = ARRAY_SIZE(algs);
967 int i, pos;
968 algs[0] = algs[1] = algs[2] = 0xff;
969 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
970 algs[0] = WLAN_AUTH_OPEN;
971 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
972 algs[1] = WLAN_AUTH_SHARED_KEY;
973 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
974 algs[2] = WLAN_AUTH_LEAP;
975 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
976 pos = 0;
977 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
978 pos = 1;
979 else
980 pos = 2;
981 for (i = 0; i < num_algs; i++) {
982 pos++;
983 if (pos >= num_algs)
984 pos = 0;
985 if (algs[pos] == ifsta->auth_alg ||
986 algs[pos] == 0xff)
987 continue;
988 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
989 !ieee80211_sta_wep_configured(dev))
990 continue;
991 ifsta->auth_alg = algs[pos];
992 printk(KERN_DEBUG "%s: set auth_alg=%d for "
993 "next try\n",
994 dev->name, ifsta->auth_alg);
995 break;
996 }
997 }
998 return;
999 }
1000
1001 switch (ifsta->auth_alg) {
1002 case WLAN_AUTH_OPEN:
1003 case WLAN_AUTH_LEAP:
1004 ieee80211_auth_completed(dev, ifsta);
1005 break;
1006 case WLAN_AUTH_SHARED_KEY:
1007 if (ifsta->auth_transaction == 4)
1008 ieee80211_auth_completed(dev, ifsta);
1009 else
1010 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1011 break;
1012 }
1013 }
1014
1015
1016 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1017 struct ieee80211_if_sta *ifsta,
1018 struct ieee80211_mgmt *mgmt,
1019 size_t len)
1020 {
1021 u16 reason_code;
1022
1023 if (len < 24 + 2) {
1024 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1025 "received from " MAC_FMT " - ignored\n",
1026 dev->name, len, MAC_ARG(mgmt->sa));
1027 return;
1028 }
1029
1030 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1031 printk(KERN_DEBUG "%s: deauthentication frame received from "
1032 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1033 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1034 MAC_ARG(mgmt->bssid));
1035 return;
1036 }
1037
1038 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1039
1040 printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1041 " (reason=%d)\n",
1042 dev->name, MAC_ARG(mgmt->sa), reason_code);
1043
1044 if (ifsta->authenticated) {
1045 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1046 }
1047
1048 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1049 ifsta->state == IEEE80211_ASSOCIATE ||
1050 ifsta->state == IEEE80211_ASSOCIATED) {
1051 ifsta->state = IEEE80211_AUTHENTICATE;
1052 mod_timer(&ifsta->timer, jiffies +
1053 IEEE80211_RETRY_AUTH_INTERVAL);
1054 }
1055
1056 ieee80211_set_disassoc(dev, ifsta, 1);
1057 ifsta->authenticated = 0;
1058 }
1059
1060
1061 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1062 struct ieee80211_if_sta *ifsta,
1063 struct ieee80211_mgmt *mgmt,
1064 size_t len)
1065 {
1066 u16 reason_code;
1067
1068 if (len < 24 + 2) {
1069 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1070 "received from " MAC_FMT " - ignored\n",
1071 dev->name, len, MAC_ARG(mgmt->sa));
1072 return;
1073 }
1074
1075 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1076 printk(KERN_DEBUG "%s: disassociation frame received from "
1077 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1078 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1079 MAC_ARG(mgmt->bssid));
1080 return;
1081 }
1082
1083 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1084
1085 printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1086 " (reason=%d)\n",
1087 dev->name, MAC_ARG(mgmt->sa), reason_code);
1088
1089 if (ifsta->associated)
1090 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1091
1092 if (ifsta->state == IEEE80211_ASSOCIATED) {
1093 ifsta->state = IEEE80211_ASSOCIATE;
1094 mod_timer(&ifsta->timer, jiffies +
1095 IEEE80211_RETRY_AUTH_INTERVAL);
1096 }
1097
1098 ieee80211_set_disassoc(dev, ifsta, 0);
1099 }
1100
1101
1102 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1103 struct ieee80211_if_sta *ifsta,
1104 struct ieee80211_mgmt *mgmt,
1105 size_t len,
1106 int reassoc)
1107 {
1108 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1109 struct ieee80211_hw_mode *mode;
1110 struct sta_info *sta;
1111 u32 rates;
1112 u16 capab_info, status_code, aid;
1113 struct ieee802_11_elems elems;
1114 u8 *pos;
1115 int i, j;
1116
1117 /* AssocResp and ReassocResp have identical structure, so process both
1118 * of them in this function. */
1119
1120 if (ifsta->state != IEEE80211_ASSOCIATE) {
1121 printk(KERN_DEBUG "%s: association frame received from "
1122 MAC_FMT ", but not in associate state - ignored\n",
1123 dev->name, MAC_ARG(mgmt->sa));
1124 return;
1125 }
1126
1127 if (len < 24 + 6) {
1128 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1129 "received from " MAC_FMT " - ignored\n",
1130 dev->name, len, MAC_ARG(mgmt->sa));
1131 return;
1132 }
1133
1134 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1135 printk(KERN_DEBUG "%s: association frame received from "
1136 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1137 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1138 MAC_ARG(mgmt->bssid));
1139 return;
1140 }
1141
1142 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1143 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1144 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1145 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1146 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1147 "set\n", dev->name, aid);
1148 aid &= ~(BIT(15) | BIT(14));
1149
1150 printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1151 "status=%d aid=%d)\n",
1152 dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1153 capab_info, status_code, aid);
1154
1155 if (status_code != WLAN_STATUS_SUCCESS) {
1156 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1157 dev->name, status_code);
1158 if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1159 ifsta->prev_bssid_set = 0;
1160 return;
1161 }
1162
1163 pos = mgmt->u.assoc_resp.variable;
1164 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1165 == ParseFailed) {
1166 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1167 dev->name);
1168 return;
1169 }
1170
1171 if (!elems.supp_rates) {
1172 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1173 dev->name);
1174 return;
1175 }
1176
1177 printk(KERN_DEBUG "%s: associated\n", dev->name);
1178 ifsta->aid = aid;
1179 ifsta->ap_capab = capab_info;
1180
1181 kfree(ifsta->assocresp_ies);
1182 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1183 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1184 if (ifsta->assocresp_ies)
1185 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1186
1187 ieee80211_set_associated(dev, ifsta, 1);
1188
1189 /* Add STA entry for the AP */
1190 sta = sta_info_get(local, ifsta->bssid);
1191 if (!sta) {
1192 struct ieee80211_sta_bss *bss;
1193 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1194 if (!sta) {
1195 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1196 " AP\n", dev->name);
1197 return;
1198 }
1199 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1200 if (bss) {
1201 sta->last_rssi = bss->rssi;
1202 sta->last_signal = bss->signal;
1203 sta->last_noise = bss->noise;
1204 ieee80211_rx_bss_put(dev, bss);
1205 }
1206 }
1207
1208 sta->dev = dev;
1209 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1210 sta->assoc_ap = 1;
1211
1212 rates = 0;
1213 mode = local->oper_hw_mode;
1214 for (i = 0; i < elems.supp_rates_len; i++) {
1215 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1216 if (mode->mode == MODE_ATHEROS_TURBO)
1217 rate *= 2;
1218 for (j = 0; j < mode->num_rates; j++)
1219 if (mode->rates[j].rate == rate)
1220 rates |= BIT(j);
1221 }
1222 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1223 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1224 if (mode->mode == MODE_ATHEROS_TURBO)
1225 rate *= 2;
1226 for (j = 0; j < mode->num_rates; j++)
1227 if (mode->rates[j].rate == rate)
1228 rates |= BIT(j);
1229 }
1230 sta->supp_rates = rates;
1231
1232 rate_control_rate_init(sta, local);
1233
1234 if (elems.wmm_param && ifsta->wmm_enabled) {
1235 sta->flags |= WLAN_STA_WME;
1236 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1237 elems.wmm_param_len);
1238 }
1239
1240
1241 sta_info_put(sta);
1242
1243 ieee80211_associated(dev, ifsta);
1244 }
1245
1246
1247 /* Caller must hold local->sta_bss_lock */
1248 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1249 struct ieee80211_sta_bss *bss)
1250 {
1251 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1252 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1253 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1254 }
1255
1256
1257 /* Caller must hold local->sta_bss_lock */
1258 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1259 struct ieee80211_sta_bss *bss)
1260 {
1261 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1262 struct ieee80211_sta_bss *b, *prev = NULL;
1263 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1264 while (b) {
1265 if (b == bss) {
1266 if (!prev)
1267 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1268 bss->hnext;
1269 else
1270 prev->hnext = bss->hnext;
1271 break;
1272 }
1273 prev = b;
1274 b = b->hnext;
1275 }
1276 }
1277
1278
1279 static struct ieee80211_sta_bss *
1280 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1281 {
1282 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1283 struct ieee80211_sta_bss *bss;
1284
1285 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1286 if (!bss)
1287 return NULL;
1288 atomic_inc(&bss->users);
1289 atomic_inc(&bss->users);
1290 memcpy(bss->bssid, bssid, ETH_ALEN);
1291
1292 spin_lock_bh(&local->sta_bss_lock);
1293 /* TODO: order by RSSI? */
1294 list_add_tail(&bss->list, &local->sta_bss_list);
1295 __ieee80211_rx_bss_hash_add(dev, bss);
1296 spin_unlock_bh(&local->sta_bss_lock);
1297 return bss;
1298 }
1299
1300
1301 static struct ieee80211_sta_bss *
1302 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1303 {
1304 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1305 struct ieee80211_sta_bss *bss;
1306
1307 spin_lock_bh(&local->sta_bss_lock);
1308 bss = local->sta_bss_hash[STA_HASH(bssid)];
1309 while (bss) {
1310 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1311 atomic_inc(&bss->users);
1312 break;
1313 }
1314 bss = bss->hnext;
1315 }
1316 spin_unlock_bh(&local->sta_bss_lock);
1317 return bss;
1318 }
1319
1320
1321 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1322 {
1323 kfree(bss->wpa_ie);
1324 kfree(bss->rsn_ie);
1325 kfree(bss->wmm_ie);
1326 kfree(bss);
1327 }
1328
1329
1330 static void ieee80211_rx_bss_put(struct net_device *dev,
1331 struct ieee80211_sta_bss *bss)
1332 {
1333 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1334 if (!atomic_dec_and_test(&bss->users))
1335 return;
1336
1337 spin_lock_bh(&local->sta_bss_lock);
1338 __ieee80211_rx_bss_hash_del(dev, bss);
1339 list_del(&bss->list);
1340 spin_unlock_bh(&local->sta_bss_lock);
1341 ieee80211_rx_bss_free(bss);
1342 }
1343
1344
1345 void ieee80211_rx_bss_list_init(struct net_device *dev)
1346 {
1347 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1348 spin_lock_init(&local->sta_bss_lock);
1349 INIT_LIST_HEAD(&local->sta_bss_list);
1350 }
1351
1352
1353 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1354 {
1355 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1356 struct ieee80211_sta_bss *bss, *tmp;
1357
1358 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1359 ieee80211_rx_bss_put(dev, bss);
1360 }
1361
1362
1363 static void ieee80211_rx_bss_info(struct net_device *dev,
1364 struct ieee80211_mgmt *mgmt,
1365 size_t len,
1366 struct ieee80211_rx_status *rx_status,
1367 int beacon)
1368 {
1369 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1370 struct ieee802_11_elems elems;
1371 size_t baselen;
1372 int channel, invalid = 0, clen;
1373 struct ieee80211_sta_bss *bss;
1374 struct sta_info *sta;
1375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1376 u64 timestamp;
1377
1378 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1379 return; /* ignore ProbeResp to foreign address */
1380
1381 #if 0
1382 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1383 dev->name, beacon ? "Beacon" : "Probe Response",
1384 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1385 #endif
1386
1387 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1388 if (baselen > len)
1389 return;
1390
1391 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1392
1393 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1394 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1395 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1396 static unsigned long last_tsf_debug = 0;
1397 u64 tsf;
1398 if (local->ops->get_tsf)
1399 tsf = local->ops->get_tsf(local_to_hw(local));
1400 else
1401 tsf = -1LLU;
1402 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1403 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1404 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1405 "@%lu\n",
1406 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1407 (unsigned long long)tsf,
1408 (unsigned long long)timestamp,
1409 (unsigned long long)(tsf - timestamp),
1410 jiffies);
1411 last_tsf_debug = jiffies;
1412 }
1413 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1414 }
1415
1416 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1417 &elems) == ParseFailed)
1418 invalid = 1;
1419
1420 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1421 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1422 (sta = sta_info_get(local, mgmt->sa))) {
1423 struct ieee80211_hw_mode *mode;
1424 struct ieee80211_rate *rates;
1425 size_t num_rates;
1426 u32 supp_rates, prev_rates;
1427 int i, j;
1428
1429 mode = local->sta_scanning ?
1430 local->scan_hw_mode : local->oper_hw_mode;
1431 rates = mode->rates;
1432 num_rates = mode->num_rates;
1433
1434 supp_rates = 0;
1435 for (i = 0; i < elems.supp_rates_len +
1436 elems.ext_supp_rates_len; i++) {
1437 u8 rate = 0;
1438 int own_rate;
1439 if (i < elems.supp_rates_len)
1440 rate = elems.supp_rates[i];
1441 else if (elems.ext_supp_rates)
1442 rate = elems.ext_supp_rates
1443 [i - elems.supp_rates_len];
1444 own_rate = 5 * (rate & 0x7f);
1445 if (mode->mode == MODE_ATHEROS_TURBO)
1446 own_rate *= 2;
1447 for (j = 0; j < num_rates; j++)
1448 if (rates[j].rate == own_rate)
1449 supp_rates |= BIT(j);
1450 }
1451
1452 prev_rates = sta->supp_rates;
1453 sta->supp_rates &= supp_rates;
1454 if (sta->supp_rates == 0) {
1455 /* No matching rates - this should not really happen.
1456 * Make sure that at least one rate is marked
1457 * supported to avoid issues with TX rate ctrl. */
1458 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1459 }
1460 if (sta->supp_rates != prev_rates) {
1461 printk(KERN_DEBUG "%s: updated supp_rates set for "
1462 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1463 "0x%x)\n",
1464 dev->name, MAC_ARG(sta->addr), prev_rates,
1465 supp_rates, sta->supp_rates);
1466 }
1467 sta_info_put(sta);
1468 }
1469
1470 if (!elems.ssid)
1471 return;
1472
1473 if (elems.ds_params && elems.ds_params_len == 1)
1474 channel = elems.ds_params[0];
1475 else
1476 channel = rx_status->channel;
1477
1478 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1479 if (!bss) {
1480 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1481 if (!bss)
1482 return;
1483 } else {
1484 #if 0
1485 /* TODO: order by RSSI? */
1486 spin_lock_bh(&local->sta_bss_lock);
1487 list_move_tail(&bss->list, &local->sta_bss_list);
1488 spin_unlock_bh(&local->sta_bss_lock);
1489 #endif
1490 }
1491
1492 if (bss->probe_resp && beacon) {
1493 /* Do not allow beacon to override data from Probe Response. */
1494 ieee80211_rx_bss_put(dev, bss);
1495 return;
1496 }
1497
1498 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1499 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1500 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1501 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1502 bss->ssid_len = elems.ssid_len;
1503 }
1504
1505 bss->supp_rates_len = 0;
1506 if (elems.supp_rates) {
1507 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1508 if (clen > elems.supp_rates_len)
1509 clen = elems.supp_rates_len;
1510 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1511 clen);
1512 bss->supp_rates_len += clen;
1513 }
1514 if (elems.ext_supp_rates) {
1515 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1516 if (clen > elems.ext_supp_rates_len)
1517 clen = elems.ext_supp_rates_len;
1518 memcpy(&bss->supp_rates[bss->supp_rates_len],
1519 elems.ext_supp_rates, clen);
1520 bss->supp_rates_len += clen;
1521 }
1522
1523 if (elems.wpa &&
1524 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1525 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1526 kfree(bss->wpa_ie);
1527 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1528 if (bss->wpa_ie) {
1529 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1530 bss->wpa_ie_len = elems.wpa_len + 2;
1531 } else
1532 bss->wpa_ie_len = 0;
1533 } else if (!elems.wpa && bss->wpa_ie) {
1534 kfree(bss->wpa_ie);
1535 bss->wpa_ie = NULL;
1536 bss->wpa_ie_len = 0;
1537 }
1538
1539 if (elems.rsn &&
1540 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1541 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1542 kfree(bss->rsn_ie);
1543 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1544 if (bss->rsn_ie) {
1545 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1546 bss->rsn_ie_len = elems.rsn_len + 2;
1547 } else
1548 bss->rsn_ie_len = 0;
1549 } else if (!elems.rsn && bss->rsn_ie) {
1550 kfree(bss->rsn_ie);
1551 bss->rsn_ie = NULL;
1552 bss->rsn_ie_len = 0;
1553 }
1554
1555 if (elems.wmm_param &&
1556 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1557 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1558 kfree(bss->wmm_ie);
1559 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1560 if (bss->wmm_ie) {
1561 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1562 elems.wmm_param_len + 2);
1563 bss->wmm_ie_len = elems.wmm_param_len + 2;
1564 } else
1565 bss->wmm_ie_len = 0;
1566 } else if (!elems.wmm_param && bss->wmm_ie) {
1567 kfree(bss->wmm_ie);
1568 bss->wmm_ie = NULL;
1569 bss->wmm_ie_len = 0;
1570 }
1571
1572
1573 bss->hw_mode = rx_status->phymode;
1574 bss->channel = channel;
1575 bss->freq = rx_status->freq;
1576 if (channel != rx_status->channel &&
1577 (bss->hw_mode == MODE_IEEE80211G ||
1578 bss->hw_mode == MODE_IEEE80211B) &&
1579 channel >= 1 && channel <= 14) {
1580 static const int freq_list[] = {
1581 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1582 2447, 2452, 2457, 2462, 2467, 2472, 2484
1583 };
1584 /* IEEE 802.11g/b mode can receive packets from neighboring
1585 * channels, so map the channel into frequency. */
1586 bss->freq = freq_list[channel - 1];
1587 }
1588 bss->timestamp = timestamp;
1589 bss->last_update = jiffies;
1590 bss->rssi = rx_status->ssi;
1591 bss->signal = rx_status->signal;
1592 bss->noise = rx_status->noise;
1593 if (!beacon)
1594 bss->probe_resp++;
1595 ieee80211_rx_bss_put(dev, bss);
1596 }
1597
1598
1599 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1600 struct ieee80211_mgmt *mgmt,
1601 size_t len,
1602 struct ieee80211_rx_status *rx_status)
1603 {
1604 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1605 }
1606
1607
1608 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1609 struct ieee80211_mgmt *mgmt,
1610 size_t len,
1611 struct ieee80211_rx_status *rx_status)
1612 {
1613 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1614 struct ieee80211_sub_if_data *sdata;
1615 struct ieee80211_if_sta *ifsta;
1616 int use_protection;
1617 size_t baselen;
1618 struct ieee802_11_elems elems;
1619
1620 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1621
1622 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1623 if (sdata->type != IEEE80211_IF_TYPE_STA)
1624 return;
1625 ifsta = &sdata->u.sta;
1626
1627 if (!ifsta->associated ||
1628 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1629 return;
1630
1631 /* Process beacon from the current BSS */
1632 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1633 if (baselen > len)
1634 return;
1635
1636 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1637 &elems) == ParseFailed)
1638 return;
1639
1640 use_protection = 0;
1641 if (elems.erp_info && elems.erp_info_len >= 1) {
1642 use_protection =
1643 (elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0;
1644 }
1645
1646 if (use_protection != !!ifsta->use_protection) {
1647 if (net_ratelimit()) {
1648 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
1649 MAC_FMT ")\n",
1650 dev->name,
1651 use_protection ? "enabled" : "disabled",
1652 MAC_ARG(ifsta->bssid));
1653 }
1654 ifsta->use_protection = use_protection ? 1 : 0;
1655 local->cts_protect_erp_frames = use_protection;
1656 }
1657
1658 if (elems.wmm_param && ifsta->wmm_enabled) {
1659 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1660 elems.wmm_param_len);
1661 }
1662 }
1663
1664
1665 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1666 struct ieee80211_if_sta *ifsta,
1667 struct ieee80211_mgmt *mgmt,
1668 size_t len,
1669 struct ieee80211_rx_status *rx_status)
1670 {
1671 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1672 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1673 int tx_last_beacon;
1674 struct sk_buff *skb;
1675 struct ieee80211_mgmt *resp;
1676 u8 *pos, *end;
1677
1678 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1679 ifsta->state != IEEE80211_IBSS_JOINED ||
1680 len < 24 + 2 || !ifsta->probe_resp)
1681 return;
1682
1683 if (local->ops->tx_last_beacon)
1684 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1685 else
1686 tx_last_beacon = 1;
1687
1688 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1689 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1690 MAC_FMT " (tx_last_beacon=%d)\n",
1691 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1692 MAC_ARG(mgmt->bssid), tx_last_beacon);
1693 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1694
1695 if (!tx_last_beacon)
1696 return;
1697
1698 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1699 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1700 return;
1701
1702 end = ((u8 *) mgmt) + len;
1703 pos = mgmt->u.probe_req.variable;
1704 if (pos[0] != WLAN_EID_SSID ||
1705 pos + 2 + pos[1] > end) {
1706 if (net_ratelimit()) {
1707 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1708 "from " MAC_FMT "\n",
1709 dev->name, MAC_ARG(mgmt->sa));
1710 }
1711 return;
1712 }
1713 if (pos[1] != 0 &&
1714 (pos[1] != ifsta->ssid_len ||
1715 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1716 /* Ignore ProbeReq for foreign SSID */
1717 return;
1718 }
1719
1720 /* Reply with ProbeResp */
1721 skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1722 if (!skb)
1723 return;
1724
1725 resp = (struct ieee80211_mgmt *) skb->data;
1726 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1727 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1728 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1729 dev->name, MAC_ARG(resp->da));
1730 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1731 ieee80211_sta_tx(dev, skb, 0);
1732 }
1733
1734
1735 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1736 struct ieee80211_rx_status *rx_status)
1737 {
1738 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1739 struct ieee80211_sub_if_data *sdata;
1740 struct ieee80211_if_sta *ifsta;
1741 struct ieee80211_mgmt *mgmt;
1742 u16 fc;
1743
1744 if (skb->len < 24)
1745 goto fail;
1746
1747 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1748 ifsta = &sdata->u.sta;
1749
1750 mgmt = (struct ieee80211_mgmt *) skb->data;
1751 fc = le16_to_cpu(mgmt->frame_control);
1752
1753 switch (fc & IEEE80211_FCTL_STYPE) {
1754 case IEEE80211_STYPE_PROBE_REQ:
1755 case IEEE80211_STYPE_PROBE_RESP:
1756 case IEEE80211_STYPE_BEACON:
1757 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1758 case IEEE80211_STYPE_AUTH:
1759 case IEEE80211_STYPE_ASSOC_RESP:
1760 case IEEE80211_STYPE_REASSOC_RESP:
1761 case IEEE80211_STYPE_DEAUTH:
1762 case IEEE80211_STYPE_DISASSOC:
1763 skb_queue_tail(&ifsta->skb_queue, skb);
1764 queue_work(local->hw.workqueue, &ifsta->work);
1765 return;
1766 default:
1767 printk(KERN_DEBUG "%s: received unknown management frame - "
1768 "stype=%d\n", dev->name,
1769 (fc & IEEE80211_FCTL_STYPE) >> 4);
1770 break;
1771 }
1772
1773 fail:
1774 kfree_skb(skb);
1775 }
1776
1777
1778 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1779 struct sk_buff *skb)
1780 {
1781 struct ieee80211_rx_status *rx_status;
1782 struct ieee80211_sub_if_data *sdata;
1783 struct ieee80211_if_sta *ifsta;
1784 struct ieee80211_mgmt *mgmt;
1785 u16 fc;
1786
1787 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1788 ifsta = &sdata->u.sta;
1789
1790 rx_status = (struct ieee80211_rx_status *) skb->cb;
1791 mgmt = (struct ieee80211_mgmt *) skb->data;
1792 fc = le16_to_cpu(mgmt->frame_control);
1793
1794 switch (fc & IEEE80211_FCTL_STYPE) {
1795 case IEEE80211_STYPE_PROBE_REQ:
1796 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1797 rx_status);
1798 break;
1799 case IEEE80211_STYPE_PROBE_RESP:
1800 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1801 break;
1802 case IEEE80211_STYPE_BEACON:
1803 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1804 break;
1805 case IEEE80211_STYPE_AUTH:
1806 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1807 break;
1808 case IEEE80211_STYPE_ASSOC_RESP:
1809 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1810 break;
1811 case IEEE80211_STYPE_REASSOC_RESP:
1812 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1813 break;
1814 case IEEE80211_STYPE_DEAUTH:
1815 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1816 break;
1817 case IEEE80211_STYPE_DISASSOC:
1818 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1819 break;
1820 }
1821
1822 kfree_skb(skb);
1823 }
1824
1825
1826 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1827 struct ieee80211_rx_status *rx_status)
1828 {
1829 struct ieee80211_mgmt *mgmt;
1830 u16 fc;
1831
1832 if (skb->len < 24) {
1833 dev_kfree_skb(skb);
1834 return;
1835 }
1836
1837 mgmt = (struct ieee80211_mgmt *) skb->data;
1838 fc = le16_to_cpu(mgmt->frame_control);
1839
1840 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1841 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1842 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1843 skb->len, rx_status);
1844 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1845 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1846 rx_status);
1847 }
1848 }
1849
1850 dev_kfree_skb(skb);
1851 }
1852
1853
1854 static int ieee80211_sta_active_ibss(struct net_device *dev)
1855 {
1856 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1857 int active = 0;
1858 struct sta_info *sta;
1859
1860 spin_lock_bh(&local->sta_lock);
1861 list_for_each_entry(sta, &local->sta_list, list) {
1862 if (sta->dev == dev &&
1863 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1864 jiffies)) {
1865 active++;
1866 break;
1867 }
1868 }
1869 spin_unlock_bh(&local->sta_lock);
1870
1871 return active;
1872 }
1873
1874
1875 static void ieee80211_sta_expire(struct net_device *dev)
1876 {
1877 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1878 struct sta_info *sta, *tmp;
1879
1880 spin_lock_bh(&local->sta_lock);
1881 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1882 if (time_after(jiffies, sta->last_rx +
1883 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1884 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1885 "\n", dev->name, MAC_ARG(sta->addr));
1886 sta_info_free(sta, 1);
1887 }
1888 spin_unlock_bh(&local->sta_lock);
1889 }
1890
1891
1892 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1893 struct ieee80211_if_sta *ifsta)
1894 {
1895 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1896
1897 ieee80211_sta_expire(dev);
1898 if (ieee80211_sta_active_ibss(dev))
1899 return;
1900
1901 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1902 "IBSS networks with same SSID (merge)\n", dev->name);
1903 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1904 }
1905
1906
1907 void ieee80211_sta_timer(unsigned long data)
1908 {
1909 struct ieee80211_sub_if_data *sdata =
1910 (struct ieee80211_sub_if_data *) data;
1911 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1912 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1913
1914 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1915 queue_work(local->hw.workqueue, &ifsta->work);
1916 }
1917
1918
1919 void ieee80211_sta_work(struct work_struct *work)
1920 {
1921 struct ieee80211_sub_if_data *sdata =
1922 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1923 struct net_device *dev = sdata->dev;
1924 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1925 struct ieee80211_if_sta *ifsta;
1926 struct sk_buff *skb;
1927
1928 if (!netif_running(dev))
1929 return;
1930
1931 if (local->sta_scanning)
1932 return;
1933
1934 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1935 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1936 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1937 "(type=%d)\n", dev->name, sdata->type);
1938 return;
1939 }
1940 ifsta = &sdata->u.sta;
1941
1942 while ((skb = skb_dequeue(&ifsta->skb_queue)))
1943 ieee80211_sta_rx_queued_mgmt(dev, skb);
1944
1945 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1946 ifsta->state != IEEE80211_ASSOCIATE &&
1947 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1948 ieee80211_sta_start_scan(dev, NULL, 0);
1949 return;
1950 }
1951
1952 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1953 if (ieee80211_sta_config_auth(dev, ifsta))
1954 return;
1955 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1956 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1957 return;
1958
1959 switch (ifsta->state) {
1960 case IEEE80211_DISABLED:
1961 break;
1962 case IEEE80211_AUTHENTICATE:
1963 ieee80211_authenticate(dev, ifsta);
1964 break;
1965 case IEEE80211_ASSOCIATE:
1966 ieee80211_associate(dev, ifsta);
1967 break;
1968 case IEEE80211_ASSOCIATED:
1969 ieee80211_associated(dev, ifsta);
1970 break;
1971 case IEEE80211_IBSS_SEARCH:
1972 ieee80211_sta_find_ibss(dev, ifsta);
1973 break;
1974 case IEEE80211_IBSS_JOINED:
1975 ieee80211_sta_merge_ibss(dev, ifsta);
1976 break;
1977 default:
1978 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
1979 ifsta->state);
1980 break;
1981 }
1982
1983 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1984 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1985 "mixed-cell disabled - disassociate\n", dev->name);
1986
1987 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
1988 ieee80211_set_disassoc(dev, ifsta, 0);
1989 }
1990 }
1991
1992
1993 static void ieee80211_sta_reset_auth(struct net_device *dev,
1994 struct ieee80211_if_sta *ifsta)
1995 {
1996 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1997
1998 if (local->ops->reset_tsf) {
1999 /* Reset own TSF to allow time synchronization work. */
2000 local->ops->reset_tsf(local_to_hw(local));
2001 }
2002
2003 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2004
2005
2006 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2007 ifsta->auth_alg = WLAN_AUTH_OPEN;
2008 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2009 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2010 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2011 ifsta->auth_alg = WLAN_AUTH_LEAP;
2012 else
2013 ifsta->auth_alg = WLAN_AUTH_OPEN;
2014 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2015 ifsta->auth_alg);
2016 ifsta->auth_transaction = -1;
2017 ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2018 netif_carrier_off(dev);
2019 }
2020
2021
2022 void ieee80211_sta_req_auth(struct net_device *dev,
2023 struct ieee80211_if_sta *ifsta)
2024 {
2025 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2026 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2027
2028 if (sdata->type != IEEE80211_IF_TYPE_STA)
2029 return;
2030
2031 if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2032 (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2033 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2034 queue_work(local->hw.workqueue, &ifsta->work);
2035 }
2036 }
2037
2038 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2039 const char *ssid, int ssid_len)
2040 {
2041 int tmp, hidden_ssid;
2042
2043 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2044 return 1;
2045
2046 if (ifsta->auto_bssid_sel)
2047 return 0;
2048
2049 hidden_ssid = 1;
2050 tmp = ssid_len;
2051 while (tmp--) {
2052 if (ssid[tmp] != '\0') {
2053 hidden_ssid = 0;
2054 break;
2055 }
2056 }
2057
2058 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2059 return 1;
2060
2061 if (ssid_len == 1 && ssid[0] == ' ')
2062 return 1;
2063
2064 return 0;
2065 }
2066
2067 static int ieee80211_sta_config_auth(struct net_device *dev,
2068 struct ieee80211_if_sta *ifsta)
2069 {
2070 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2071 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2072 struct ieee80211_sta_bss *bss, *selected = NULL;
2073 int top_rssi = 0, freq;
2074
2075 rtnl_lock();
2076
2077 if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2078 !ifsta->auto_ssid_sel) {
2079 ifsta->state = IEEE80211_AUTHENTICATE;
2080 rtnl_unlock();
2081 ieee80211_sta_reset_auth(dev, ifsta);
2082 return 0;
2083 }
2084
2085 spin_lock_bh(&local->sta_bss_lock);
2086 freq = local->oper_channel->freq;
2087 list_for_each_entry(bss, &local->sta_bss_list, list) {
2088 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2089 continue;
2090
2091 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2092 !!sdata->default_key)
2093 continue;
2094
2095 if (!ifsta->auto_channel_sel && bss->freq != freq)
2096 continue;
2097
2098 if (!ifsta->auto_bssid_sel &&
2099 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2100 continue;
2101
2102 if (!ifsta->auto_ssid_sel &&
2103 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2104 continue;
2105
2106 if (!selected || top_rssi < bss->rssi) {
2107 selected = bss;
2108 top_rssi = bss->rssi;
2109 }
2110 }
2111 if (selected)
2112 atomic_inc(&selected->users);
2113 spin_unlock_bh(&local->sta_bss_lock);
2114
2115 if (selected) {
2116 ieee80211_set_channel(local, -1, selected->freq);
2117 if (!ifsta->ssid_set)
2118 ieee80211_sta_set_ssid(dev, selected->ssid,
2119 selected->ssid_len);
2120 ieee80211_sta_set_bssid(dev, selected->bssid);
2121 ieee80211_rx_bss_put(dev, selected);
2122 ifsta->state = IEEE80211_AUTHENTICATE;
2123 rtnl_unlock();
2124 ieee80211_sta_reset_auth(dev, ifsta);
2125 return 0;
2126 } else {
2127 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2128 ieee80211_sta_start_scan(dev, NULL, 0);
2129 ifsta->state = IEEE80211_AUTHENTICATE;
2130 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2131 } else
2132 ifsta->state = IEEE80211_DISABLED;
2133 }
2134 rtnl_unlock();
2135 return -1;
2136 }
2137
2138 static int ieee80211_sta_join_ibss(struct net_device *dev,
2139 struct ieee80211_if_sta *ifsta,
2140 struct ieee80211_sta_bss *bss)
2141 {
2142 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2143 int res, rates, i, j;
2144 struct sk_buff *skb;
2145 struct ieee80211_mgmt *mgmt;
2146 struct ieee80211_tx_control control;
2147 struct ieee80211_rate *rate;
2148 struct ieee80211_hw_mode *mode;
2149 struct rate_control_extra extra;
2150 u8 *pos;
2151 struct ieee80211_sub_if_data *sdata;
2152
2153 /* Remove possible STA entries from other IBSS networks. */
2154 sta_info_flush(local, NULL);
2155
2156 if (local->ops->reset_tsf) {
2157 /* Reset own TSF to allow time synchronization work. */
2158 local->ops->reset_tsf(local_to_hw(local));
2159 }
2160 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2161 res = ieee80211_if_config(dev);
2162 if (res)
2163 return res;
2164
2165 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2166
2167 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2168 sdata->drop_unencrypted = bss->capability &
2169 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2170
2171 res = ieee80211_set_channel(local, -1, bss->freq);
2172
2173 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2174 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2175 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2176 local->hw.conf.freq);
2177 return -1;
2178 }
2179
2180 /* Set beacon template based on scan results */
2181 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2182 do {
2183 if (!skb)
2184 break;
2185
2186 skb_reserve(skb, local->hw.extra_tx_headroom);
2187
2188 mgmt = (struct ieee80211_mgmt *)
2189 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2190 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2191 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2192 IEEE80211_STYPE_BEACON);
2193 memset(mgmt->da, 0xff, ETH_ALEN);
2194 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2195 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2196 mgmt->u.beacon.beacon_int =
2197 cpu_to_le16(local->hw.conf.beacon_int);
2198 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2199
2200 pos = skb_put(skb, 2 + ifsta->ssid_len);
2201 *pos++ = WLAN_EID_SSID;
2202 *pos++ = ifsta->ssid_len;
2203 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2204
2205 rates = bss->supp_rates_len;
2206 if (rates > 8)
2207 rates = 8;
2208 pos = skb_put(skb, 2 + rates);
2209 *pos++ = WLAN_EID_SUPP_RATES;
2210 *pos++ = rates;
2211 memcpy(pos, bss->supp_rates, rates);
2212
2213 pos = skb_put(skb, 2 + 1);
2214 *pos++ = WLAN_EID_DS_PARAMS;
2215 *pos++ = 1;
2216 *pos++ = bss->channel;
2217
2218 pos = skb_put(skb, 2 + 2);
2219 *pos++ = WLAN_EID_IBSS_PARAMS;
2220 *pos++ = 2;
2221 /* FIX: set ATIM window based on scan results */
2222 *pos++ = 0;
2223 *pos++ = 0;
2224
2225 if (bss->supp_rates_len > 8) {
2226 rates = bss->supp_rates_len - 8;
2227 pos = skb_put(skb, 2 + rates);
2228 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2229 *pos++ = rates;
2230 memcpy(pos, &bss->supp_rates[8], rates);
2231 }
2232
2233 memset(&control, 0, sizeof(control));
2234 memset(&extra, 0, sizeof(extra));
2235 extra.mode = local->oper_hw_mode;
2236 rate = rate_control_get_rate(local, dev, skb, &extra);
2237 if (!rate) {
2238 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2239 "for IBSS beacon\n", dev->name);
2240 break;
2241 }
2242 control.tx_rate = (local->short_preamble &&
2243 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2244 rate->val2 : rate->val;
2245 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2246 control.power_level = local->hw.conf.power_level;
2247 control.flags |= IEEE80211_TXCTL_NO_ACK;
2248 control.retry_limit = 1;
2249
2250 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2251 if (ifsta->probe_resp) {
2252 mgmt = (struct ieee80211_mgmt *)
2253 ifsta->probe_resp->data;
2254 mgmt->frame_control =
2255 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2256 IEEE80211_STYPE_PROBE_RESP);
2257 } else {
2258 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2259 "template for IBSS\n", dev->name);
2260 }
2261
2262 if (local->ops->beacon_update &&
2263 local->ops->beacon_update(local_to_hw(local),
2264 skb, &control) == 0) {
2265 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2266 "template based on scan results\n", dev->name);
2267 skb = NULL;
2268 }
2269
2270 rates = 0;
2271 mode = local->oper_hw_mode;
2272 for (i = 0; i < bss->supp_rates_len; i++) {
2273 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2274 if (mode->mode == MODE_ATHEROS_TURBO)
2275 bitrate *= 2;
2276 for (j = 0; j < mode->num_rates; j++)
2277 if (mode->rates[j].rate == bitrate)
2278 rates |= BIT(j);
2279 }
2280 ifsta->supp_rates_bits = rates;
2281 } while (0);
2282
2283 if (skb) {
2284 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2285 "template\n", dev->name);
2286 dev_kfree_skb(skb);
2287 }
2288
2289 ifsta->state = IEEE80211_IBSS_JOINED;
2290 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2291
2292 ieee80211_rx_bss_put(dev, bss);
2293
2294 return res;
2295 }
2296
2297
2298 static int ieee80211_sta_create_ibss(struct net_device *dev,
2299 struct ieee80211_if_sta *ifsta)
2300 {
2301 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2302 struct ieee80211_sta_bss *bss;
2303 struct ieee80211_sub_if_data *sdata;
2304 struct ieee80211_hw_mode *mode;
2305 u8 bssid[ETH_ALEN], *pos;
2306 int i;
2307
2308 #if 0
2309 /* Easier testing, use fixed BSSID. */
2310 memset(bssid, 0xfe, ETH_ALEN);
2311 #else
2312 /* Generate random, not broadcast, locally administered BSSID. Mix in
2313 * own MAC address to make sure that devices that do not have proper
2314 * random number generator get different BSSID. */
2315 get_random_bytes(bssid, ETH_ALEN);
2316 for (i = 0; i < ETH_ALEN; i++)
2317 bssid[i] ^= dev->dev_addr[i];
2318 bssid[0] &= ~0x01;
2319 bssid[0] |= 0x02;
2320 #endif
2321
2322 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2323 dev->name, MAC_ARG(bssid));
2324
2325 bss = ieee80211_rx_bss_add(dev, bssid);
2326 if (!bss)
2327 return -ENOMEM;
2328
2329 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2330 mode = local->oper_hw_mode;
2331
2332 if (local->hw.conf.beacon_int == 0)
2333 local->hw.conf.beacon_int = 100;
2334 bss->beacon_int = local->hw.conf.beacon_int;
2335 bss->hw_mode = local->hw.conf.phymode;
2336 bss->channel = local->hw.conf.channel;
2337 bss->freq = local->hw.conf.freq;
2338 bss->last_update = jiffies;
2339 bss->capability = WLAN_CAPABILITY_IBSS;
2340 if (sdata->default_key) {
2341 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2342 } else
2343 sdata->drop_unencrypted = 0;
2344 bss->supp_rates_len = mode->num_rates;
2345 pos = bss->supp_rates;
2346 for (i = 0; i < mode->num_rates; i++) {
2347 int rate = mode->rates[i].rate;
2348 if (mode->mode == MODE_ATHEROS_TURBO)
2349 rate /= 2;
2350 *pos++ = (u8) (rate / 5);
2351 }
2352
2353 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2354 }
2355
2356
2357 static int ieee80211_sta_find_ibss(struct net_device *dev,
2358 struct ieee80211_if_sta *ifsta)
2359 {
2360 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2361 struct ieee80211_sta_bss *bss;
2362 int found = 0;
2363 u8 bssid[ETH_ALEN];
2364 int active_ibss;
2365
2366 if (ifsta->ssid_len == 0)
2367 return -EINVAL;
2368
2369 active_ibss = ieee80211_sta_active_ibss(dev);
2370 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2371 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2372 dev->name, active_ibss);
2373 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2374 spin_lock_bh(&local->sta_bss_lock);
2375 list_for_each_entry(bss, &local->sta_bss_list, list) {
2376 if (ifsta->ssid_len != bss->ssid_len ||
2377 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2378 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2379 continue;
2380 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2381 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2382 MAC_ARG(bss->bssid));
2383 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2384 memcpy(bssid, bss->bssid, ETH_ALEN);
2385 found = 1;
2386 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2387 break;
2388 }
2389 spin_unlock_bh(&local->sta_bss_lock);
2390
2391 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2392 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2393 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2394 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2395 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2396 (bss = ieee80211_rx_bss_get(dev, bssid))) {
2397 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2398 " based on configured SSID\n",
2399 dev->name, MAC_ARG(bssid));
2400 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2401 }
2402 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2403 printk(KERN_DEBUG " did not try to join ibss\n");
2404 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2405
2406 /* Selected IBSS not found in current scan results - try to scan */
2407 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2408 !ieee80211_sta_active_ibss(dev)) {
2409 mod_timer(&ifsta->timer, jiffies +
2410 IEEE80211_IBSS_MERGE_INTERVAL);
2411 } else if (time_after(jiffies, local->last_scan_completed +
2412 IEEE80211_SCAN_INTERVAL)) {
2413 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2414 "join\n", dev->name);
2415 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2416 ifsta->ssid_len);
2417 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2418 int interval = IEEE80211_SCAN_INTERVAL;
2419
2420 if (time_after(jiffies, ifsta->ibss_join_req +
2421 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2422 if (ifsta->create_ibss &&
2423 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2424 return ieee80211_sta_create_ibss(dev, ifsta);
2425 if (ifsta->create_ibss) {
2426 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2427 " configured channel %d (%d MHz)\n",
2428 dev->name, local->hw.conf.channel,
2429 local->hw.conf.freq);
2430 }
2431
2432 /* No IBSS found - decrease scan interval and continue
2433 * scanning. */
2434 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2435 }
2436
2437 ifsta->state = IEEE80211_IBSS_SEARCH;
2438 mod_timer(&ifsta->timer, jiffies + interval);
2439 return 0;
2440 }
2441
2442 return 0;
2443 }
2444
2445
2446 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2447 {
2448 struct ieee80211_sub_if_data *sdata;
2449 struct ieee80211_if_sta *ifsta;
2450 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2451
2452 if (len > IEEE80211_MAX_SSID_LEN)
2453 return -EINVAL;
2454
2455 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2456 * not defined. */
2457 if (local->ops->conf_tx) {
2458 struct ieee80211_tx_queue_params qparam;
2459 int i;
2460
2461 memset(&qparam, 0, sizeof(qparam));
2462 /* TODO: are these ok defaults for all hw_modes? */
2463 qparam.aifs = 2;
2464 qparam.cw_min =
2465 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2466 qparam.cw_max = 1023;
2467 qparam.burst_time = 0;
2468 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2469 {
2470 local->ops->conf_tx(local_to_hw(local),
2471 i + IEEE80211_TX_QUEUE_DATA0,
2472 &qparam);
2473 }
2474 /* IBSS uses different parameters for Beacon sending */
2475 qparam.cw_min++;
2476 qparam.cw_min *= 2;
2477 qparam.cw_min--;
2478 local->ops->conf_tx(local_to_hw(local),
2479 IEEE80211_TX_QUEUE_BEACON, &qparam);
2480 }
2481
2482 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2483 ifsta = &sdata->u.sta;
2484
2485 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2486 ifsta->prev_bssid_set = 0;
2487 memcpy(ifsta->ssid, ssid, len);
2488 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2489 ifsta->ssid_len = len;
2490
2491 ifsta->ssid_set = len ? 1 : 0;
2492 if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2493 ifsta->ibss_join_req = jiffies;
2494 ifsta->state = IEEE80211_IBSS_SEARCH;
2495 return ieee80211_sta_find_ibss(dev, ifsta);
2496 }
2497 return 0;
2498 }
2499
2500
2501 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2502 {
2503 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2504 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2505 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2506 *len = ifsta->ssid_len;
2507 return 0;
2508 }
2509
2510
2511 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2512 {
2513 struct ieee80211_sub_if_data *sdata;
2514 struct ieee80211_if_sta *ifsta;
2515 int res;
2516
2517 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2518 ifsta = &sdata->u.sta;
2519
2520 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2521 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2522 res = ieee80211_if_config(dev);
2523 if (res) {
2524 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2525 "the low-level driver\n", dev->name);
2526 return res;
2527 }
2528 }
2529
2530 if (!is_valid_ether_addr(bssid))
2531 ifsta->bssid_set = 0;
2532 else
2533 ifsta->bssid_set = 1;
2534 return 0;
2535 }
2536
2537
2538 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2539 struct ieee80211_sub_if_data *sdata,
2540 int powersave)
2541 {
2542 struct sk_buff *skb;
2543 struct ieee80211_hdr *nullfunc;
2544 u16 fc;
2545
2546 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2547 if (!skb) {
2548 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2549 "frame\n", sdata->dev->name);
2550 return;
2551 }
2552 skb_reserve(skb, local->hw.extra_tx_headroom);
2553
2554 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2555 memset(nullfunc, 0, 24);
2556 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2557 IEEE80211_FCTL_TODS;
2558 if (powersave)
2559 fc |= IEEE80211_FCTL_PM;
2560 nullfunc->frame_control = cpu_to_le16(fc);
2561 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2562 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2563 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2564
2565 ieee80211_sta_tx(sdata->dev, skb, 0);
2566 }
2567
2568
2569 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2570 {
2571 struct ieee80211_local *local = hw_to_local(hw);
2572 struct net_device *dev = local->scan_dev;
2573 struct ieee80211_sub_if_data *sdata;
2574 union iwreq_data wrqu;
2575
2576 local->last_scan_completed = jiffies;
2577 wmb();
2578 local->sta_scanning = 0;
2579
2580 if (ieee80211_hw_config(local))
2581 printk(KERN_DEBUG "%s: failed to restore operational"
2582 "channel after scan\n", dev->name);
2583
2584 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2585 ieee80211_if_config(dev))
2586 printk(KERN_DEBUG "%s: failed to restore operational"
2587 "BSSID after scan\n", dev->name);
2588
2589 memset(&wrqu, 0, sizeof(wrqu));
2590 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2591
2592 read_lock(&local->sub_if_lock);
2593 list_for_each_entry(sdata, &local->sub_if_list, list) {
2594
2595 /* No need to wake the master device. */
2596 if (sdata->dev == local->mdev)
2597 continue;
2598
2599 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2600 if (sdata->u.sta.associated)
2601 ieee80211_send_nullfunc(local, sdata, 0);
2602 ieee80211_sta_timer((unsigned long)sdata);
2603 }
2604
2605 netif_wake_queue(sdata->dev);
2606 }
2607 read_unlock(&local->sub_if_lock);
2608
2609 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2610 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2611 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2612 if (!ifsta->bssid_set ||
2613 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2614 !ieee80211_sta_active_ibss(dev)))
2615 ieee80211_sta_find_ibss(dev, ifsta);
2616 }
2617 }
2618 EXPORT_SYMBOL(ieee80211_scan_completed);
2619
2620 void ieee80211_sta_scan_work(struct work_struct *work)
2621 {
2622 struct ieee80211_local *local =
2623 container_of(work, struct ieee80211_local, scan_work.work);
2624 struct net_device *dev = local->scan_dev;
2625 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2626 struct ieee80211_hw_mode *mode;
2627 struct ieee80211_channel *chan;
2628 int skip;
2629 unsigned long next_delay = 0;
2630
2631 if (!local->sta_scanning)
2632 return;
2633
2634 switch (local->scan_state) {
2635 case SCAN_SET_CHANNEL:
2636 mode = local->scan_hw_mode;
2637 if (local->scan_hw_mode->list.next == &local->modes_list &&
2638 local->scan_channel_idx >= mode->num_channels) {
2639 ieee80211_scan_completed(local_to_hw(local));
2640 return;
2641 }
2642 skip = !(local->enabled_modes & (1 << mode->mode));
2643 chan = &mode->channels[local->scan_channel_idx];
2644 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2645 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2646 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2647 (local->hw_modes & local->enabled_modes &
2648 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2649 skip = 1;
2650
2651 if (!skip) {
2652 #if 0
2653 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2654 dev->name, chan->chan, chan->freq);
2655 #endif
2656
2657 local->scan_channel = chan;
2658 if (ieee80211_hw_config(local)) {
2659 printk(KERN_DEBUG "%s: failed to set channel "
2660 "%d (%d MHz) for scan\n", dev->name,
2661 chan->chan, chan->freq);
2662 skip = 1;
2663 }
2664 }
2665
2666 local->scan_channel_idx++;
2667 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2668 if (local->scan_hw_mode->list.next != &local->modes_list) {
2669 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2670 struct ieee80211_hw_mode,
2671 list);
2672 local->scan_channel_idx = 0;
2673 }
2674 }
2675
2676 if (skip)
2677 break;
2678
2679 next_delay = IEEE80211_PROBE_DELAY +
2680 usecs_to_jiffies(local->hw.channel_change_time);
2681 local->scan_state = SCAN_SEND_PROBE;
2682 break;
2683 case SCAN_SEND_PROBE:
2684 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2685 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2686 local->scan_ssid_len);
2687 next_delay = IEEE80211_CHANNEL_TIME;
2688 } else
2689 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2690 local->scan_state = SCAN_SET_CHANNEL;
2691 break;
2692 }
2693
2694 if (local->sta_scanning)
2695 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2696 next_delay);
2697 }
2698
2699
2700 static int ieee80211_sta_start_scan(struct net_device *dev,
2701 u8 *ssid, size_t ssid_len)
2702 {
2703 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2704 struct ieee80211_sub_if_data *sdata;
2705
2706 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2707 return -EINVAL;
2708
2709 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2710 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2711 * BSSID: MACAddress
2712 * SSID
2713 * ScanType: ACTIVE, PASSIVE
2714 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2715 * a Probe frame during active scanning
2716 * ChannelList
2717 * MinChannelTime (>= ProbeDelay), in TU
2718 * MaxChannelTime: (>= MinChannelTime), in TU
2719 */
2720
2721 /* MLME-SCAN.confirm
2722 * BSSDescriptionSet
2723 * ResultCode: SUCCESS, INVALID_PARAMETERS
2724 */
2725
2726 if (local->sta_scanning) {
2727 if (local->scan_dev == dev)
2728 return 0;
2729 return -EBUSY;
2730 }
2731
2732 if (local->ops->hw_scan) {
2733 int rc = local->ops->hw_scan(local_to_hw(local),
2734 ssid, ssid_len);
2735 if (!rc) {
2736 local->sta_scanning = 1;
2737 local->scan_dev = dev;
2738 }
2739 return rc;
2740 }
2741
2742 local->sta_scanning = 1;
2743
2744 read_lock(&local->sub_if_lock);
2745 list_for_each_entry(sdata, &local->sub_if_list, list) {
2746
2747 /* Don't stop the master interface, otherwise we can't transmit
2748 * probes! */
2749 if (sdata->dev == local->mdev)
2750 continue;
2751
2752 netif_stop_queue(sdata->dev);
2753 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2754 sdata->u.sta.associated)
2755 ieee80211_send_nullfunc(local, sdata, 1);
2756 }
2757 read_unlock(&local->sub_if_lock);
2758
2759 if (ssid) {
2760 local->scan_ssid_len = ssid_len;
2761 memcpy(local->scan_ssid, ssid, ssid_len);
2762 } else
2763 local->scan_ssid_len = 0;
2764 local->scan_state = SCAN_SET_CHANNEL;
2765 local->scan_hw_mode = list_entry(local->modes_list.next,
2766 struct ieee80211_hw_mode,
2767 list);
2768 local->scan_channel_idx = 0;
2769 local->scan_dev = dev;
2770
2771 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2772 ieee80211_if_config(dev))
2773 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2774 dev->name);
2775
2776 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2777 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2778 IEEE80211_CHANNEL_TIME);
2779
2780 return 0;
2781 }
2782
2783
2784 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2785 {
2786 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2787 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2788 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2789
2790 if (sdata->type != IEEE80211_IF_TYPE_STA)
2791 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2792
2793 if (local->sta_scanning) {
2794 if (local->scan_dev == dev)
2795 return 0;
2796 return -EBUSY;
2797 }
2798
2799 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2800 queue_work(local->hw.workqueue, &ifsta->work);
2801 return 0;
2802 }
2803
2804 static char *
2805 ieee80211_sta_scan_result(struct net_device *dev,
2806 struct ieee80211_sta_bss *bss,
2807 char *current_ev, char *end_buf)
2808 {
2809 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2810 struct iw_event iwe;
2811
2812 if (time_after(jiffies,
2813 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2814 return current_ev;
2815
2816 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2817 return current_ev;
2818
2819 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2820 !bss->wpa_ie && !bss->rsn_ie)
2821 return current_ev;
2822
2823 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2824 (local->scan_ssid_len != bss->ssid_len ||
2825 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2826 return current_ev;
2827
2828 memset(&iwe, 0, sizeof(iwe));
2829 iwe.cmd = SIOCGIWAP;
2830 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2831 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2832 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2833 IW_EV_ADDR_LEN);
2834
2835 memset(&iwe, 0, sizeof(iwe));
2836 iwe.cmd = SIOCGIWESSID;
2837 iwe.u.data.length = bss->ssid_len;
2838 iwe.u.data.flags = 1;
2839 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2840 bss->ssid);
2841
2842 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2843 memset(&iwe, 0, sizeof(iwe));
2844 iwe.cmd = SIOCGIWMODE;
2845 if (bss->capability & WLAN_CAPABILITY_ESS)
2846 iwe.u.mode = IW_MODE_MASTER;
2847 else
2848 iwe.u.mode = IW_MODE_ADHOC;
2849 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2850 IW_EV_UINT_LEN);
2851 }
2852
2853 memset(&iwe, 0, sizeof(iwe));
2854 iwe.cmd = SIOCGIWFREQ;
2855 iwe.u.freq.m = bss->channel;
2856 iwe.u.freq.e = 0;
2857 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2858 IW_EV_FREQ_LEN);
2859 iwe.u.freq.m = bss->freq * 100000;
2860 iwe.u.freq.e = 1;
2861 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2862 IW_EV_FREQ_LEN);
2863
2864 memset(&iwe, 0, sizeof(iwe));
2865 iwe.cmd = IWEVQUAL;
2866 iwe.u.qual.qual = bss->signal;
2867 iwe.u.qual.level = bss->rssi;
2868 iwe.u.qual.noise = bss->noise;
2869 iwe.u.qual.updated = local->wstats_flags;
2870 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2871 IW_EV_QUAL_LEN);
2872
2873 memset(&iwe, 0, sizeof(iwe));
2874 iwe.cmd = SIOCGIWENCODE;
2875 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2876 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2877 else
2878 iwe.u.data.flags = IW_ENCODE_DISABLED;
2879 iwe.u.data.length = 0;
2880 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2881
2882 if (bss && bss->wpa_ie) {
2883 memset(&iwe, 0, sizeof(iwe));
2884 iwe.cmd = IWEVGENIE;
2885 iwe.u.data.length = bss->wpa_ie_len;
2886 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2887 bss->wpa_ie);
2888 }
2889
2890 if (bss && bss->rsn_ie) {
2891 memset(&iwe, 0, sizeof(iwe));
2892 iwe.cmd = IWEVGENIE;
2893 iwe.u.data.length = bss->rsn_ie_len;
2894 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2895 bss->rsn_ie);
2896 }
2897
2898 if (bss && bss->supp_rates_len > 0) {
2899 /* display all supported rates in readable format */
2900 char *p = current_ev + IW_EV_LCP_LEN;
2901 int i;
2902
2903 memset(&iwe, 0, sizeof(iwe));
2904 iwe.cmd = SIOCGIWRATE;
2905 /* Those two flags are ignored... */
2906 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2907
2908 for (i = 0; i < bss->supp_rates_len; i++) {
2909 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2910 0x7f) * 500000);
2911 p = iwe_stream_add_value(current_ev, p,
2912 end_buf, &iwe, IW_EV_PARAM_LEN);
2913 }
2914 current_ev = p;
2915 }
2916
2917 if (bss) {
2918 char *buf;
2919 buf = kmalloc(30, GFP_ATOMIC);
2920 if (buf) {
2921 memset(&iwe, 0, sizeof(iwe));
2922 iwe.cmd = IWEVCUSTOM;
2923 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2924 iwe.u.data.length = strlen(buf);
2925 current_ev = iwe_stream_add_point(current_ev, end_buf,
2926 &iwe, buf);
2927 kfree(buf);
2928 }
2929 }
2930
2931 do {
2932 char *buf;
2933
2934 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2935 break;
2936
2937 buf = kmalloc(100, GFP_ATOMIC);
2938 if (!buf)
2939 break;
2940
2941 memset(&iwe, 0, sizeof(iwe));
2942 iwe.cmd = IWEVCUSTOM;
2943 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2944 iwe.u.data.length = strlen(buf);
2945 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2946 buf);
2947
2948 memset(&iwe, 0, sizeof(iwe));
2949 iwe.cmd = IWEVCUSTOM;
2950 sprintf(buf, "capab=0x%04x", bss->capability);
2951 iwe.u.data.length = strlen(buf);
2952 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2953 buf);
2954
2955 kfree(buf);
2956 break;
2957 } while (0);
2958
2959 return current_ev;
2960 }
2961
2962
2963 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2964 {
2965 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2966 char *current_ev = buf;
2967 char *end_buf = buf + len;
2968 struct ieee80211_sta_bss *bss;
2969
2970 spin_lock_bh(&local->sta_bss_lock);
2971 list_for_each_entry(bss, &local->sta_bss_list, list) {
2972 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
2973 spin_unlock_bh(&local->sta_bss_lock);
2974 return -E2BIG;
2975 }
2976 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
2977 end_buf);
2978 }
2979 spin_unlock_bh(&local->sta_bss_lock);
2980 return current_ev - buf;
2981 }
2982
2983
2984 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
2985 {
2986 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2987 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2988 kfree(ifsta->extra_ie);
2989 if (len == 0) {
2990 ifsta->extra_ie = NULL;
2991 ifsta->extra_ie_len = 0;
2992 return 0;
2993 }
2994 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2995 if (!ifsta->extra_ie) {
2996 ifsta->extra_ie_len = 0;
2997 return -ENOMEM;
2998 }
2999 memcpy(ifsta->extra_ie, ie, len);
3000 ifsta->extra_ie_len = len;
3001 return 0;
3002 }
3003
3004
3005 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3006 struct sk_buff *skb, u8 *bssid,
3007 u8 *addr)
3008 {
3009 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3010 struct sta_info *sta;
3011 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3012
3013 /* TODO: Could consider removing the least recently used entry and
3014 * allow new one to be added. */
3015 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3016 if (net_ratelimit()) {
3017 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3018 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3019 }
3020 return NULL;
3021 }
3022
3023 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3024 local->mdev->name, MAC_ARG(addr), dev->name);
3025
3026 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3027 if (!sta)
3028 return NULL;
3029
3030 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3031
3032 rate_control_rate_init(sta, local);
3033
3034 return sta; /* caller will call sta_info_put() */
3035 }
3036
3037
3038 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3039 {
3040 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3041 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3042
3043 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3044 dev->name, reason);
3045
3046 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3047 sdata->type != IEEE80211_IF_TYPE_IBSS)
3048 return -EINVAL;
3049
3050 ieee80211_send_deauth(dev, ifsta, reason);
3051 ieee80211_set_disassoc(dev, ifsta, 1);
3052 return 0;
3053 }
3054
3055
3056 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3057 {
3058 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3059 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3060
3061 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3062 dev->name, reason);
3063
3064 if (sdata->type != IEEE80211_IF_TYPE_STA)
3065 return -EINVAL;
3066
3067 if (!ifsta->associated)
3068 return -1;
3069
3070 ieee80211_send_disassoc(dev, ifsta, reason);
3071 ieee80211_set_disassoc(dev, ifsta, 0);
3072 return 0;
3073 }
Tomato firmware and modifications.