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ACPI: thinkpad-acpi: fix regression on HKEY LID event handling
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / ieee80211_sta.c
blob73d39e1e094907d663e25f09ff0f9a657befff23
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 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <net/iw_handler.h>
28 #include <asm/types.h>
29
30 #include <net/mac80211.h>
31 #include "ieee80211_i.h"
32 #include "ieee80211_rate.h"
33 #include "hostapd_ioctl.h"
34
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_MAX_TRIES 3
39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
45
46 #define IEEE80211_PROBE_DELAY (HZ / 33)
47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
52
53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
54
55
56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
57
58 #define ERP_INFO_USE_PROTECTION BIT(1)
59
60 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
61 u8 *ssid, size_t ssid_len);
62 static struct ieee80211_sta_bss *
63 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
64 u8 *ssid, u8 ssid_len);
65 static void ieee80211_rx_bss_put(struct net_device *dev,
66 struct ieee80211_sta_bss *bss);
67 static int ieee80211_sta_find_ibss(struct net_device *dev,
68 struct ieee80211_if_sta *ifsta);
69 static int ieee80211_sta_wep_configured(struct net_device *dev);
70 static int ieee80211_sta_start_scan(struct net_device *dev,
71 u8 *ssid, size_t ssid_len);
72 static int ieee80211_sta_config_auth(struct net_device *dev,
73 struct ieee80211_if_sta *ifsta);
74
75
76 /* Parsed Information Elements */
77 struct ieee802_11_elems {
78 /* pointers to IEs */
79 u8 *ssid;
80 u8 *supp_rates;
81 u8 *fh_params;
82 u8 *ds_params;
83 u8 *cf_params;
84 u8 *tim;
85 u8 *ibss_params;
86 u8 *challenge;
87 u8 *wpa;
88 u8 *rsn;
89 u8 *erp_info;
90 u8 *ext_supp_rates;
91 u8 *wmm_info;
92 u8 *wmm_param;
93
94 /* length of them, respectively */
95 u8 ssid_len;
96 u8 supp_rates_len;
97 u8 fh_params_len;
98 u8 ds_params_len;
99 u8 cf_params_len;
100 u8 tim_len;
101 u8 ibss_params_len;
102 u8 challenge_len;
103 u8 wpa_len;
104 u8 rsn_len;
105 u8 erp_info_len;
106 u8 ext_supp_rates_len;
107 u8 wmm_info_len;
108 u8 wmm_param_len;
109 };
110
111 static void ieee802_11_parse_elems(u8 *start, size_t len,
112 struct ieee802_11_elems *elems)
113 {
114 size_t left = len;
115 u8 *pos = start;
116
117 memset(elems, 0, sizeof(*elems));
118
119 while (left >= 2) {
120 u8 id, elen;
121
122 id = *pos++;
123 elen = *pos++;
124 left -= 2;
125
126 if (elen > left)
127 return;
128
129 switch (id) {
130 case WLAN_EID_SSID:
131 elems->ssid = pos;
132 elems->ssid_len = elen;
133 break;
134 case WLAN_EID_SUPP_RATES:
135 elems->supp_rates = pos;
136 elems->supp_rates_len = elen;
137 break;
138 case WLAN_EID_FH_PARAMS:
139 elems->fh_params = pos;
140 elems->fh_params_len = elen;
141 break;
142 case WLAN_EID_DS_PARAMS:
143 elems->ds_params = pos;
144 elems->ds_params_len = elen;
145 break;
146 case WLAN_EID_CF_PARAMS:
147 elems->cf_params = pos;
148 elems->cf_params_len = elen;
149 break;
150 case WLAN_EID_TIM:
151 elems->tim = pos;
152 elems->tim_len = elen;
153 break;
154 case WLAN_EID_IBSS_PARAMS:
155 elems->ibss_params = pos;
156 elems->ibss_params_len = elen;
157 break;
158 case WLAN_EID_CHALLENGE:
159 elems->challenge = pos;
160 elems->challenge_len = elen;
161 break;
162 case WLAN_EID_WPA:
163 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
164 pos[2] == 0xf2) {
165 /* Microsoft OUI (00:50:F2) */
166 if (pos[3] == 1) {
167 /* OUI Type 1 - WPA IE */
168 elems->wpa = pos;
169 elems->wpa_len = elen;
170 } else if (elen >= 5 && pos[3] == 2) {
171 if (pos[4] == 0) {
172 elems->wmm_info = pos;
173 elems->wmm_info_len = elen;
174 } else if (pos[4] == 1) {
175 elems->wmm_param = pos;
176 elems->wmm_param_len = elen;
177 }
178 }
179 }
180 break;
181 case WLAN_EID_RSN:
182 elems->rsn = pos;
183 elems->rsn_len = elen;
184 break;
185 case WLAN_EID_ERP_INFO:
186 elems->erp_info = pos;
187 elems->erp_info_len = elen;
188 break;
189 case WLAN_EID_EXT_SUPP_RATES:
190 elems->ext_supp_rates = pos;
191 elems->ext_supp_rates_len = elen;
192 break;
193 default:
194 break;
195 }
196
197 left -= elen;
198 pos += elen;
199 }
200 }
201
202
203 static int ecw2cw(int ecw)
204 {
205 int cw = 1;
206 while (ecw > 0) {
207 cw <<= 1;
208 ecw--;
209 }
210 return cw - 1;
211 }
212
213
214 static void ieee80211_sta_wmm_params(struct net_device *dev,
215 struct ieee80211_if_sta *ifsta,
216 u8 *wmm_param, size_t wmm_param_len)
217 {
218 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
219 struct ieee80211_tx_queue_params params;
220 size_t left;
221 int count;
222 u8 *pos;
223
224 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
225 return;
226 count = wmm_param[6] & 0x0f;
227 if (count == ifsta->wmm_last_param_set)
228 return;
229 ifsta->wmm_last_param_set = count;
230
231 pos = wmm_param + 8;
232 left = wmm_param_len - 8;
233
234 memset(&params, 0, sizeof(params));
235
236 if (!local->ops->conf_tx)
237 return;
238
239 local->wmm_acm = 0;
240 for (; left >= 4; left -= 4, pos += 4) {
241 int aci = (pos[0] >> 5) & 0x03;
242 int acm = (pos[0] >> 4) & 0x01;
243 int queue;
244
245 switch (aci) {
246 case 1:
247 queue = IEEE80211_TX_QUEUE_DATA3;
248 if (acm) {
249 local->wmm_acm |= BIT(0) | BIT(3);
250 }
251 break;
252 case 2:
253 queue = IEEE80211_TX_QUEUE_DATA1;
254 if (acm) {
255 local->wmm_acm |= BIT(4) | BIT(5);
256 }
257 break;
258 case 3:
259 queue = IEEE80211_TX_QUEUE_DATA0;
260 if (acm) {
261 local->wmm_acm |= BIT(6) | BIT(7);
262 }
263 break;
264 case 0:
265 default:
266 queue = IEEE80211_TX_QUEUE_DATA2;
267 if (acm) {
268 local->wmm_acm |= BIT(1) | BIT(2);
269 }
270 break;
271 }
272
273 params.aifs = pos[0] & 0x0f;
274 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
275 params.cw_min = ecw2cw(pos[1] & 0x0f);
276 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
277 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
278 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
279 "cWmin=%d cWmax=%d burst=%d\n",
280 dev->name, queue, aci, acm, params.aifs, params.cw_min,
281 params.cw_max, params.burst_time);
282 /* TODO: handle ACM (block TX, fallback to next lowest allowed
283 * AC for now) */
284 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
285 printk(KERN_DEBUG "%s: failed to set TX queue "
286 "parameters for queue %d\n", dev->name, queue);
287 }
288 }
289 }
290
291
292 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
293 {
294 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
295 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
296 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
297
298 if (use_protection != sdata->use_protection) {
299 if (net_ratelimit()) {
300 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
301 MAC_FMT ")\n",
302 dev->name,
303 use_protection ? "enabled" : "disabled",
304 MAC_ARG(ifsta->bssid));
305 }
306 sdata->use_protection = use_protection;
307 }
308 }
309
310
311 static void ieee80211_sta_send_associnfo(struct net_device *dev,
312 struct ieee80211_if_sta *ifsta)
313 {
314 char *buf;
315 size_t len;
316 int i;
317 union iwreq_data wrqu;
318
319 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
320 return;
321
322 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
323 ifsta->assocresp_ies_len), GFP_ATOMIC);
324 if (!buf)
325 return;
326
327 len = sprintf(buf, "ASSOCINFO(");
328 if (ifsta->assocreq_ies) {
329 len += sprintf(buf + len, "ReqIEs=");
330 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
331 len += sprintf(buf + len, "%02x",
332 ifsta->assocreq_ies[i]);
333 }
334 }
335 if (ifsta->assocresp_ies) {
336 if (ifsta->assocreq_ies)
337 len += sprintf(buf + len, " ");
338 len += sprintf(buf + len, "RespIEs=");
339 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
340 len += sprintf(buf + len, "%02x",
341 ifsta->assocresp_ies[i]);
342 }
343 }
344 len += sprintf(buf + len, ")");
345
346 if (len > IW_CUSTOM_MAX) {
347 len = sprintf(buf, "ASSOCRESPIE=");
348 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
349 len += sprintf(buf + len, "%02x",
350 ifsta->assocresp_ies[i]);
351 }
352 }
353
354 memset(&wrqu, 0, sizeof(wrqu));
355 wrqu.data.length = len;
356 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
357
358 kfree(buf);
359 }
360
361
362 static void ieee80211_set_associated(struct net_device *dev,
363 struct ieee80211_if_sta *ifsta, int assoc)
364 {
365 union iwreq_data wrqu;
366 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
367 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
368
369 if (ifsta->associated == assoc)
370 return;
371
372 ifsta->associated = assoc;
373
374 if (assoc) {
375 struct ieee80211_sub_if_data *sdata;
376 struct ieee80211_sta_bss *bss;
377 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
378 if (sdata->type != IEEE80211_IF_TYPE_STA)
379 return;
380
381 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
382 local->hw.conf.channel,
383 ifsta->ssid, ifsta->ssid_len);
384 if (bss) {
385 if (bss->has_erp_value)
386 ieee80211_handle_erp_ie(dev, bss->erp_value);
387 ieee80211_rx_bss_put(dev, bss);
388 }
389
390 netif_carrier_on(dev);
391 ifsta->prev_bssid_set = 1;
392 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
393 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
394 ieee80211_sta_send_associnfo(dev, ifsta);
395 } else {
396 netif_carrier_off(dev);
397 sdata->use_protection = 0;
398 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
399 }
400 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
401 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
402 ifsta->last_probe = jiffies;
403 }
404
405 static void ieee80211_set_disassoc(struct net_device *dev,
406 struct ieee80211_if_sta *ifsta, int deauth)
407 {
408 if (deauth)
409 ifsta->auth_tries = 0;
410 ifsta->assoc_tries = 0;
411 ieee80211_set_associated(dev, ifsta, 0);
412 }
413
414 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
415 int encrypt)
416 {
417 struct ieee80211_sub_if_data *sdata;
418 struct ieee80211_tx_packet_data *pkt_data;
419
420 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
421 skb->dev = sdata->local->mdev;
422 skb_set_mac_header(skb, 0);
423 skb_set_network_header(skb, 0);
424 skb_set_transport_header(skb, 0);
425
426 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
427 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
428 pkt_data->ifindex = sdata->dev->ifindex;
429 pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
430 pkt_data->do_not_encrypt = !encrypt;
431
432 dev_queue_xmit(skb);
433 }
434
435
436 static void ieee80211_send_auth(struct net_device *dev,
437 struct ieee80211_if_sta *ifsta,
438 int transaction, u8 *extra, size_t extra_len,
439 int encrypt)
440 {
441 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
442 struct sk_buff *skb;
443 struct ieee80211_mgmt *mgmt;
444
445 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
446 sizeof(*mgmt) + 6 + extra_len);
447 if (!skb) {
448 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
449 "frame\n", dev->name);
450 return;
451 }
452 skb_reserve(skb, local->hw.extra_tx_headroom);
453
454 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
455 memset(mgmt, 0, 24 + 6);
456 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
457 IEEE80211_STYPE_AUTH);
458 if (encrypt)
459 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
460 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
461 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
462 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
463 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
464 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
465 ifsta->auth_transaction = transaction + 1;
466 mgmt->u.auth.status_code = cpu_to_le16(0);
467 if (extra)
468 memcpy(skb_put(skb, extra_len), extra, extra_len);
469
470 ieee80211_sta_tx(dev, skb, encrypt);
471 }
472
473
474 static void ieee80211_authenticate(struct net_device *dev,
475 struct ieee80211_if_sta *ifsta)
476 {
477 ifsta->auth_tries++;
478 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
479 printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
480 " timed out\n",
481 dev->name, MAC_ARG(ifsta->bssid));
482 ifsta->state = IEEE80211_DISABLED;
483 return;
484 }
485
486 ifsta->state = IEEE80211_AUTHENTICATE;
487 printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
488 dev->name, MAC_ARG(ifsta->bssid));
489
490 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
491
492 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
493 }
494
495
496 static void ieee80211_send_assoc(struct net_device *dev,
497 struct ieee80211_if_sta *ifsta)
498 {
499 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
500 struct ieee80211_hw_mode *mode;
501 struct sk_buff *skb;
502 struct ieee80211_mgmt *mgmt;
503 u8 *pos, *ies;
504 int i, len;
505 u16 capab;
506 struct ieee80211_sta_bss *bss;
507 int wmm = 0;
508
509 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
510 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
511 ifsta->ssid_len);
512 if (!skb) {
513 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
514 "frame\n", dev->name);
515 return;
516 }
517 skb_reserve(skb, local->hw.extra_tx_headroom);
518
519 mode = local->oper_hw_mode;
520 capab = ifsta->capab;
521 if (mode->mode == MODE_IEEE80211G) {
522 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
523 WLAN_CAPABILITY_SHORT_PREAMBLE;
524 }
525 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
526 ifsta->ssid, ifsta->ssid_len);
527 if (bss) {
528 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
529 capab |= WLAN_CAPABILITY_PRIVACY;
530 if (bss->wmm_ie) {
531 wmm = 1;
532 }
533 ieee80211_rx_bss_put(dev, bss);
534 }
535
536 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
537 memset(mgmt, 0, 24);
538 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
539 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
540 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
541
542 if (ifsta->prev_bssid_set) {
543 skb_put(skb, 10);
544 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
545 IEEE80211_STYPE_REASSOC_REQ);
546 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
547 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
548 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
549 ETH_ALEN);
550 } else {
551 skb_put(skb, 4);
552 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
553 IEEE80211_STYPE_ASSOC_REQ);
554 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
555 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
556 }
557
558 /* SSID */
559 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
560 *pos++ = WLAN_EID_SSID;
561 *pos++ = ifsta->ssid_len;
562 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
563
564 len = mode->num_rates;
565 if (len > 8)
566 len = 8;
567 pos = skb_put(skb, len + 2);
568 *pos++ = WLAN_EID_SUPP_RATES;
569 *pos++ = len;
570 for (i = 0; i < len; i++) {
571 int rate = mode->rates[i].rate;
572 if (mode->mode == MODE_ATHEROS_TURBO)
573 rate /= 2;
574 *pos++ = (u8) (rate / 5);
575 }
576
577 if (mode->num_rates > len) {
578 pos = skb_put(skb, mode->num_rates - len + 2);
579 *pos++ = WLAN_EID_EXT_SUPP_RATES;
580 *pos++ = mode->num_rates - len;
581 for (i = len; i < mode->num_rates; i++) {
582 int rate = mode->rates[i].rate;
583 if (mode->mode == MODE_ATHEROS_TURBO)
584 rate /= 2;
585 *pos++ = (u8) (rate / 5);
586 }
587 }
588
589 if (ifsta->extra_ie) {
590 pos = skb_put(skb, ifsta->extra_ie_len);
591 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
592 }
593
594 if (wmm && ifsta->wmm_enabled) {
595 pos = skb_put(skb, 9);
596 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
597 *pos++ = 7; /* len */
598 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
599 *pos++ = 0x50;
600 *pos++ = 0xf2;
601 *pos++ = 2; /* WME */
602 *pos++ = 0; /* WME info */
603 *pos++ = 1; /* WME ver */
604 *pos++ = 0;
605 }
606
607 kfree(ifsta->assocreq_ies);
608 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
609 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
610 if (ifsta->assocreq_ies)
611 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
612
613 ieee80211_sta_tx(dev, skb, 0);
614 }
615
616
617 static void ieee80211_send_deauth(struct net_device *dev,
618 struct ieee80211_if_sta *ifsta, u16 reason)
619 {
620 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
621 struct sk_buff *skb;
622 struct ieee80211_mgmt *mgmt;
623
624 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
625 if (!skb) {
626 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
627 "frame\n", dev->name);
628 return;
629 }
630 skb_reserve(skb, local->hw.extra_tx_headroom);
631
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
633 memset(mgmt, 0, 24);
634 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
635 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
636 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
637 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
638 IEEE80211_STYPE_DEAUTH);
639 skb_put(skb, 2);
640 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
641
642 ieee80211_sta_tx(dev, skb, 0);
643 }
644
645
646 static void ieee80211_send_disassoc(struct net_device *dev,
647 struct ieee80211_if_sta *ifsta, u16 reason)
648 {
649 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
650 struct sk_buff *skb;
651 struct ieee80211_mgmt *mgmt;
652
653 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
654 if (!skb) {
655 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
656 "frame\n", dev->name);
657 return;
658 }
659 skb_reserve(skb, local->hw.extra_tx_headroom);
660
661 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
662 memset(mgmt, 0, 24);
663 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
664 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
665 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
666 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
667 IEEE80211_STYPE_DISASSOC);
668 skb_put(skb, 2);
669 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
670
671 ieee80211_sta_tx(dev, skb, 0);
672 }
673
674
675 static int ieee80211_privacy_mismatch(struct net_device *dev,
676 struct ieee80211_if_sta *ifsta)
677 {
678 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
679 struct ieee80211_sta_bss *bss;
680 int res = 0;
681
682 if (!ifsta || ifsta->mixed_cell ||
683 ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
684 return 0;
685
686 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
687 ifsta->ssid, ifsta->ssid_len);
688 if (!bss)
689 return 0;
690
691 if (ieee80211_sta_wep_configured(dev) !=
692 !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
693 res = 1;
694
695 ieee80211_rx_bss_put(dev, bss);
696
697 return res;
698 }
699
700
701 static void ieee80211_associate(struct net_device *dev,
702 struct ieee80211_if_sta *ifsta)
703 {
704 ifsta->assoc_tries++;
705 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
706 printk(KERN_DEBUG "%s: association with AP " MAC_FMT
707 " timed out\n",
708 dev->name, MAC_ARG(ifsta->bssid));
709 ifsta->state = IEEE80211_DISABLED;
710 return;
711 }
712
713 ifsta->state = IEEE80211_ASSOCIATE;
714 printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
715 dev->name, MAC_ARG(ifsta->bssid));
716 if (ieee80211_privacy_mismatch(dev, ifsta)) {
717 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
718 "mixed-cell disabled - abort association\n", dev->name);
719 ifsta->state = IEEE80211_DISABLED;
720 return;
721 }
722
723 ieee80211_send_assoc(dev, ifsta);
724
725 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
726 }
727
728
729 static void ieee80211_associated(struct net_device *dev,
730 struct ieee80211_if_sta *ifsta)
731 {
732 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
733 struct sta_info *sta;
734 int disassoc;
735
736 /* TODO: start monitoring current AP signal quality and number of
737 * missed beacons. Scan other channels every now and then and search
738 * for better APs. */
739 /* TODO: remove expired BSSes */
740
741 ifsta->state = IEEE80211_ASSOCIATED;
742
743 sta = sta_info_get(local, ifsta->bssid);
744 if (!sta) {
745 printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
746 dev->name, MAC_ARG(ifsta->bssid));
747 disassoc = 1;
748 } else {
749 disassoc = 0;
750 if (time_after(jiffies,
751 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
752 if (ifsta->probereq_poll) {
753 printk(KERN_DEBUG "%s: No ProbeResp from "
754 "current AP " MAC_FMT " - assume out of "
755 "range\n",
756 dev->name, MAC_ARG(ifsta->bssid));
757 disassoc = 1;
758 sta_info_free(sta, 0);
759 ifsta->probereq_poll = 0;
760 } else {
761 ieee80211_send_probe_req(dev, ifsta->bssid,
762 local->scan_ssid,
763 local->scan_ssid_len);
764 ifsta->probereq_poll = 1;
765 }
766 } else {
767 ifsta->probereq_poll = 0;
768 if (time_after(jiffies, ifsta->last_probe +
769 IEEE80211_PROBE_INTERVAL)) {
770 ifsta->last_probe = jiffies;
771 ieee80211_send_probe_req(dev, ifsta->bssid,
772 ifsta->ssid,
773 ifsta->ssid_len);
774 }
775 }
776 sta_info_put(sta);
777 }
778 if (disassoc) {
779 union iwreq_data wrqu;
780 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
781 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
782 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
783 mod_timer(&ifsta->timer, jiffies +
784 IEEE80211_MONITORING_INTERVAL + 30 * HZ);
785 } else {
786 mod_timer(&ifsta->timer, jiffies +
787 IEEE80211_MONITORING_INTERVAL);
788 }
789 }
790
791
792 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
793 u8 *ssid, size_t ssid_len)
794 {
795 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
796 struct ieee80211_hw_mode *mode;
797 struct sk_buff *skb;
798 struct ieee80211_mgmt *mgmt;
799 u8 *pos, *supp_rates, *esupp_rates = NULL;
800 int i;
801
802 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
803 if (!skb) {
804 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
805 "request\n", dev->name);
806 return;
807 }
808 skb_reserve(skb, local->hw.extra_tx_headroom);
809
810 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
811 memset(mgmt, 0, 24);
812 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
813 IEEE80211_STYPE_PROBE_REQ);
814 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
815 if (dst) {
816 memcpy(mgmt->da, dst, ETH_ALEN);
817 memcpy(mgmt->bssid, dst, ETH_ALEN);
818 } else {
819 memset(mgmt->da, 0xff, ETH_ALEN);
820 memset(mgmt->bssid, 0xff, ETH_ALEN);
821 }
822 pos = skb_put(skb, 2 + ssid_len);
823 *pos++ = WLAN_EID_SSID;
824 *pos++ = ssid_len;
825 memcpy(pos, ssid, ssid_len);
826
827 supp_rates = skb_put(skb, 2);
828 supp_rates[0] = WLAN_EID_SUPP_RATES;
829 supp_rates[1] = 0;
830 mode = local->oper_hw_mode;
831 for (i = 0; i < mode->num_rates; i++) {
832 struct ieee80211_rate *rate = &mode->rates[i];
833 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
834 continue;
835 if (esupp_rates) {
836 pos = skb_put(skb, 1);
837 esupp_rates[1]++;
838 } else if (supp_rates[1] == 8) {
839 esupp_rates = skb_put(skb, 3);
840 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
841 esupp_rates[1] = 1;
842 pos = &esupp_rates[2];
843 } else {
844 pos = skb_put(skb, 1);
845 supp_rates[1]++;
846 }
847 if (mode->mode == MODE_ATHEROS_TURBO)
848 *pos = rate->rate / 10;
849 else
850 *pos = rate->rate / 5;
851 }
852
853 ieee80211_sta_tx(dev, skb, 0);
854 }
855
856
857 static int ieee80211_sta_wep_configured(struct net_device *dev)
858 {
859 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
860 if (!sdata || !sdata->default_key ||
861 sdata->default_key->alg != ALG_WEP)
862 return 0;
863 return 1;
864 }
865
866
867 static void ieee80211_auth_completed(struct net_device *dev,
868 struct ieee80211_if_sta *ifsta)
869 {
870 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
871 ifsta->authenticated = 1;
872 ieee80211_associate(dev, ifsta);
873 }
874
875
876 static void ieee80211_auth_challenge(struct net_device *dev,
877 struct ieee80211_if_sta *ifsta,
878 struct ieee80211_mgmt *mgmt,
879 size_t len)
880 {
881 u8 *pos;
882 struct ieee802_11_elems elems;
883
884 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
885 pos = mgmt->u.auth.variable;
886 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
887 if (!elems.challenge) {
888 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
889 "frame\n", dev->name);
890 return;
891 }
892 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
893 elems.challenge_len + 2, 1);
894 }
895
896
897 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
898 struct ieee80211_if_sta *ifsta,
899 struct ieee80211_mgmt *mgmt,
900 size_t len)
901 {
902 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
903 u16 auth_alg, auth_transaction, status_code;
904
905 if (ifsta->state != IEEE80211_AUTHENTICATE &&
906 sdata->type != IEEE80211_IF_TYPE_IBSS) {
907 printk(KERN_DEBUG "%s: authentication frame received from "
908 MAC_FMT ", but not in authenticate state - ignored\n",
909 dev->name, MAC_ARG(mgmt->sa));
910 return;
911 }
912
913 if (len < 24 + 6) {
914 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
915 "received from " MAC_FMT " - ignored\n",
916 dev->name, len, MAC_ARG(mgmt->sa));
917 return;
918 }
919
920 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
921 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
922 printk(KERN_DEBUG "%s: authentication frame received from "
923 "unknown AP (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 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
930 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
931 printk(KERN_DEBUG "%s: authentication frame received from "
932 "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
933 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
934 MAC_ARG(mgmt->bssid));
935 return;
936 }
937
938 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
939 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
940 status_code = le16_to_cpu(mgmt->u.auth.status_code);
941
942 printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
943 "transaction=%d status=%d)\n",
944 dev->name, MAC_ARG(mgmt->sa), auth_alg,
945 auth_transaction, status_code);
946
947 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
948 /* IEEE 802.11 standard does not require authentication in IBSS
949 * networks and most implementations do not seem to use it.
950 * However, try to reply to authentication attempts if someone
951 * has actually implemented this.
952 * TODO: Could implement shared key authentication. */
953 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
954 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
955 "frame (alg=%d transaction=%d)\n",
956 dev->name, auth_alg, auth_transaction);
957 return;
958 }
959 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
960 }
961
962 if (auth_alg != ifsta->auth_alg ||
963 auth_transaction != ifsta->auth_transaction) {
964 printk(KERN_DEBUG "%s: unexpected authentication frame "
965 "(alg=%d transaction=%d)\n",
966 dev->name, auth_alg, auth_transaction);
967 return;
968 }
969
970 if (status_code != WLAN_STATUS_SUCCESS) {
971 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
972 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
973 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
974 u8 algs[3];
975 const int num_algs = ARRAY_SIZE(algs);
976 int i, pos;
977 algs[0] = algs[1] = algs[2] = 0xff;
978 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
979 algs[0] = WLAN_AUTH_OPEN;
980 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
981 algs[1] = WLAN_AUTH_SHARED_KEY;
982 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
983 algs[2] = WLAN_AUTH_LEAP;
984 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
985 pos = 0;
986 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
987 pos = 1;
988 else
989 pos = 2;
990 for (i = 0; i < num_algs; i++) {
991 pos++;
992 if (pos >= num_algs)
993 pos = 0;
994 if (algs[pos] == ifsta->auth_alg ||
995 algs[pos] == 0xff)
996 continue;
997 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
998 !ieee80211_sta_wep_configured(dev))
999 continue;
1000 ifsta->auth_alg = algs[pos];
1001 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1002 "next try\n",
1003 dev->name, ifsta->auth_alg);
1004 break;
1005 }
1006 }
1007 return;
1008 }
1009
1010 switch (ifsta->auth_alg) {
1011 case WLAN_AUTH_OPEN:
1012 case WLAN_AUTH_LEAP:
1013 ieee80211_auth_completed(dev, ifsta);
1014 break;
1015 case WLAN_AUTH_SHARED_KEY:
1016 if (ifsta->auth_transaction == 4)
1017 ieee80211_auth_completed(dev, ifsta);
1018 else
1019 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1020 break;
1021 }
1022 }
1023
1024
1025 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1026 struct ieee80211_if_sta *ifsta,
1027 struct ieee80211_mgmt *mgmt,
1028 size_t len)
1029 {
1030 u16 reason_code;
1031
1032 if (len < 24 + 2) {
1033 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1034 "received from " MAC_FMT " - ignored\n",
1035 dev->name, len, MAC_ARG(mgmt->sa));
1036 return;
1037 }
1038
1039 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1040 printk(KERN_DEBUG "%s: deauthentication frame received from "
1041 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1042 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1043 MAC_ARG(mgmt->bssid));
1044 return;
1045 }
1046
1047 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1048
1049 printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1050 " (reason=%d)\n",
1051 dev->name, MAC_ARG(mgmt->sa), reason_code);
1052
1053 if (ifsta->authenticated) {
1054 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1055 }
1056
1057 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1058 ifsta->state == IEEE80211_ASSOCIATE ||
1059 ifsta->state == IEEE80211_ASSOCIATED) {
1060 ifsta->state = IEEE80211_AUTHENTICATE;
1061 mod_timer(&ifsta->timer, jiffies +
1062 IEEE80211_RETRY_AUTH_INTERVAL);
1063 }
1064
1065 ieee80211_set_disassoc(dev, ifsta, 1);
1066 ifsta->authenticated = 0;
1067 }
1068
1069
1070 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1071 struct ieee80211_if_sta *ifsta,
1072 struct ieee80211_mgmt *mgmt,
1073 size_t len)
1074 {
1075 u16 reason_code;
1076
1077 if (len < 24 + 2) {
1078 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1079 "received from " MAC_FMT " - ignored\n",
1080 dev->name, len, MAC_ARG(mgmt->sa));
1081 return;
1082 }
1083
1084 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1085 printk(KERN_DEBUG "%s: disassociation frame received from "
1086 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1087 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1088 MAC_ARG(mgmt->bssid));
1089 return;
1090 }
1091
1092 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1093
1094 printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1095 " (reason=%d)\n",
1096 dev->name, MAC_ARG(mgmt->sa), reason_code);
1097
1098 if (ifsta->associated)
1099 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1100
1101 if (ifsta->state == IEEE80211_ASSOCIATED) {
1102 ifsta->state = IEEE80211_ASSOCIATE;
1103 mod_timer(&ifsta->timer, jiffies +
1104 IEEE80211_RETRY_AUTH_INTERVAL);
1105 }
1106
1107 ieee80211_set_disassoc(dev, ifsta, 0);
1108 }
1109
1110
1111 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1112 struct ieee80211_if_sta *ifsta,
1113 struct ieee80211_mgmt *mgmt,
1114 size_t len,
1115 int reassoc)
1116 {
1117 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1118 struct ieee80211_hw_mode *mode;
1119 struct sta_info *sta;
1120 u32 rates;
1121 u16 capab_info, status_code, aid;
1122 struct ieee802_11_elems elems;
1123 u8 *pos;
1124 int i, j;
1125
1126 /* AssocResp and ReassocResp have identical structure, so process both
1127 * of them in this function. */
1128
1129 if (ifsta->state != IEEE80211_ASSOCIATE) {
1130 printk(KERN_DEBUG "%s: association frame received from "
1131 MAC_FMT ", but not in associate state - ignored\n",
1132 dev->name, MAC_ARG(mgmt->sa));
1133 return;
1134 }
1135
1136 if (len < 24 + 6) {
1137 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1138 "received from " MAC_FMT " - ignored\n",
1139 dev->name, len, MAC_ARG(mgmt->sa));
1140 return;
1141 }
1142
1143 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1144 printk(KERN_DEBUG "%s: association frame received from "
1145 "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1146 "ignored\n", dev->name, MAC_ARG(mgmt->sa),
1147 MAC_ARG(mgmt->bssid));
1148 return;
1149 }
1150
1151 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1152 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1153 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1154
1155 printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1156 "status=%d aid=%d)\n",
1157 dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1158 capab_info, status_code, aid & ~(BIT(15) | BIT(14)));
1159
1160 if (status_code != WLAN_STATUS_SUCCESS) {
1161 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1162 dev->name, status_code);
1163 if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1164 ifsta->prev_bssid_set = 0;
1165 return;
1166 }
1167
1168 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1169 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1170 "set\n", dev->name, aid);
1171 aid &= ~(BIT(15) | BIT(14));
1172
1173 pos = mgmt->u.assoc_resp.variable;
1174 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1175
1176 if (!elems.supp_rates) {
1177 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1178 dev->name);
1179 return;
1180 }
1181
1182 /* it probably doesn't, but if the frame includes an ERP value then
1183 * update our stored copy */
1184 if (elems.erp_info && elems.erp_info_len >= 1) {
1185 struct ieee80211_sta_bss *bss
1186 = ieee80211_rx_bss_get(dev, ifsta->bssid,
1187 local->hw.conf.channel,
1188 ifsta->ssid, ifsta->ssid_len);
1189 if (bss) {
1190 bss->erp_value = elems.erp_info[0];
1191 bss->has_erp_value = 1;
1192 ieee80211_rx_bss_put(dev, bss);
1193 }
1194 }
1195
1196 printk(KERN_DEBUG "%s: associated\n", dev->name);
1197 ifsta->aid = aid;
1198 ifsta->ap_capab = capab_info;
1199
1200 kfree(ifsta->assocresp_ies);
1201 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1202 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1203 if (ifsta->assocresp_ies)
1204 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1205
1206 ieee80211_set_associated(dev, ifsta, 1);
1207
1208 /* Add STA entry for the AP */
1209 sta = sta_info_get(local, ifsta->bssid);
1210 if (!sta) {
1211 struct ieee80211_sta_bss *bss;
1212 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1213 if (!sta) {
1214 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1215 " AP\n", dev->name);
1216 return;
1217 }
1218 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1219 local->hw.conf.channel,
1220 ifsta->ssid, ifsta->ssid_len);
1221 if (bss) {
1222 sta->last_rssi = bss->rssi;
1223 sta->last_signal = bss->signal;
1224 sta->last_noise = bss->noise;
1225 ieee80211_rx_bss_put(dev, bss);
1226 }
1227 }
1228
1229 sta->dev = dev;
1230 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1231 sta->assoc_ap = 1;
1232
1233 rates = 0;
1234 mode = local->oper_hw_mode;
1235 for (i = 0; i < elems.supp_rates_len; i++) {
1236 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1237 if (mode->mode == MODE_ATHEROS_TURBO)
1238 rate *= 2;
1239 for (j = 0; j < mode->num_rates; j++)
1240 if (mode->rates[j].rate == rate)
1241 rates |= BIT(j);
1242 }
1243 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1244 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1245 if (mode->mode == MODE_ATHEROS_TURBO)
1246 rate *= 2;
1247 for (j = 0; j < mode->num_rates; j++)
1248 if (mode->rates[j].rate == rate)
1249 rates |= BIT(j);
1250 }
1251 sta->supp_rates = rates;
1252
1253 rate_control_rate_init(sta, local);
1254
1255 if (elems.wmm_param && ifsta->wmm_enabled) {
1256 sta->flags |= WLAN_STA_WME;
1257 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1258 elems.wmm_param_len);
1259 }
1260
1261
1262 sta_info_put(sta);
1263
1264 ieee80211_associated(dev, ifsta);
1265 }
1266
1267
1268 /* Caller must hold local->sta_bss_lock */
1269 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1270 struct ieee80211_sta_bss *bss)
1271 {
1272 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1273 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1274 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1275 }
1276
1277
1278 /* Caller must hold local->sta_bss_lock */
1279 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1280 struct ieee80211_sta_bss *bss)
1281 {
1282 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1283 struct ieee80211_sta_bss *b, *prev = NULL;
1284 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1285 while (b) {
1286 if (b == bss) {
1287 if (!prev)
1288 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1289 bss->hnext;
1290 else
1291 prev->hnext = bss->hnext;
1292 break;
1293 }
1294 prev = b;
1295 b = b->hnext;
1296 }
1297 }
1298
1299
1300 static struct ieee80211_sta_bss *
1301 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1302 u8 *ssid, u8 ssid_len)
1303 {
1304 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1305 struct ieee80211_sta_bss *bss;
1306
1307 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1308 if (!bss)
1309 return NULL;
1310 atomic_inc(&bss->users);
1311 atomic_inc(&bss->users);
1312 memcpy(bss->bssid, bssid, ETH_ALEN);
1313 bss->channel = channel;
1314 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1315 memcpy(bss->ssid, ssid, ssid_len);
1316 bss->ssid_len = ssid_len;
1317 }
1318
1319 spin_lock_bh(&local->sta_bss_lock);
1320 /* TODO: order by RSSI? */
1321 list_add_tail(&bss->list, &local->sta_bss_list);
1322 __ieee80211_rx_bss_hash_add(dev, bss);
1323 spin_unlock_bh(&local->sta_bss_lock);
1324 return bss;
1325 }
1326
1327
1328 static struct ieee80211_sta_bss *
1329 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1330 u8 *ssid, u8 ssid_len)
1331 {
1332 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1333 struct ieee80211_sta_bss *bss;
1334
1335 spin_lock_bh(&local->sta_bss_lock);
1336 bss = local->sta_bss_hash[STA_HASH(bssid)];
1337 while (bss) {
1338 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1339 bss->channel == channel &&
1340 bss->ssid_len == ssid_len &&
1341 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1342 atomic_inc(&bss->users);
1343 break;
1344 }
1345 bss = bss->hnext;
1346 }
1347 spin_unlock_bh(&local->sta_bss_lock);
1348 return bss;
1349 }
1350
1351
1352 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1353 {
1354 kfree(bss->wpa_ie);
1355 kfree(bss->rsn_ie);
1356 kfree(bss->wmm_ie);
1357 kfree(bss);
1358 }
1359
1360
1361 static void ieee80211_rx_bss_put(struct net_device *dev,
1362 struct ieee80211_sta_bss *bss)
1363 {
1364 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1365 if (!atomic_dec_and_test(&bss->users))
1366 return;
1367
1368 spin_lock_bh(&local->sta_bss_lock);
1369 __ieee80211_rx_bss_hash_del(dev, bss);
1370 list_del(&bss->list);
1371 spin_unlock_bh(&local->sta_bss_lock);
1372 ieee80211_rx_bss_free(bss);
1373 }
1374
1375
1376 void ieee80211_rx_bss_list_init(struct net_device *dev)
1377 {
1378 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1379 spin_lock_init(&local->sta_bss_lock);
1380 INIT_LIST_HEAD(&local->sta_bss_list);
1381 }
1382
1383
1384 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1385 {
1386 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1387 struct ieee80211_sta_bss *bss, *tmp;
1388
1389 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1390 ieee80211_rx_bss_put(dev, bss);
1391 }
1392
1393
1394 static void ieee80211_rx_bss_info(struct net_device *dev,
1395 struct ieee80211_mgmt *mgmt,
1396 size_t len,
1397 struct ieee80211_rx_status *rx_status,
1398 int beacon)
1399 {
1400 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401 struct ieee802_11_elems elems;
1402 size_t baselen;
1403 int channel, clen;
1404 struct ieee80211_sta_bss *bss;
1405 struct sta_info *sta;
1406 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1407 u64 timestamp;
1408
1409 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1410 return; /* ignore ProbeResp to foreign address */
1411
1412 #if 0
1413 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1414 dev->name, beacon ? "Beacon" : "Probe Response",
1415 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1416 #endif
1417
1418 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1419 if (baselen > len)
1420 return;
1421
1422 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1423
1424 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1425 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1426 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1427 static unsigned long last_tsf_debug = 0;
1428 u64 tsf;
1429 if (local->ops->get_tsf)
1430 tsf = local->ops->get_tsf(local_to_hw(local));
1431 else
1432 tsf = -1LLU;
1433 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1434 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1435 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1436 "@%lu\n",
1437 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1438 (unsigned long long)tsf,
1439 (unsigned long long)timestamp,
1440 (unsigned long long)(tsf - timestamp),
1441 jiffies);
1442 last_tsf_debug = jiffies;
1443 }
1444 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1445 }
1446
1447 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1448
1449 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1450 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1451 (sta = sta_info_get(local, mgmt->sa))) {
1452 struct ieee80211_hw_mode *mode;
1453 struct ieee80211_rate *rates;
1454 size_t num_rates;
1455 u32 supp_rates, prev_rates;
1456 int i, j;
1457
1458 mode = local->sta_scanning ?
1459 local->scan_hw_mode : local->oper_hw_mode;
1460 rates = mode->rates;
1461 num_rates = mode->num_rates;
1462
1463 supp_rates = 0;
1464 for (i = 0; i < elems.supp_rates_len +
1465 elems.ext_supp_rates_len; i++) {
1466 u8 rate = 0;
1467 int own_rate;
1468 if (i < elems.supp_rates_len)
1469 rate = elems.supp_rates[i];
1470 else if (elems.ext_supp_rates)
1471 rate = elems.ext_supp_rates
1472 [i - elems.supp_rates_len];
1473 own_rate = 5 * (rate & 0x7f);
1474 if (mode->mode == MODE_ATHEROS_TURBO)
1475 own_rate *= 2;
1476 for (j = 0; j < num_rates; j++)
1477 if (rates[j].rate == own_rate)
1478 supp_rates |= BIT(j);
1479 }
1480
1481 prev_rates = sta->supp_rates;
1482 sta->supp_rates &= supp_rates;
1483 if (sta->supp_rates == 0) {
1484 /* No matching rates - this should not really happen.
1485 * Make sure that at least one rate is marked
1486 * supported to avoid issues with TX rate ctrl. */
1487 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1488 }
1489 if (sta->supp_rates != prev_rates) {
1490 printk(KERN_DEBUG "%s: updated supp_rates set for "
1491 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1492 "0x%x)\n",
1493 dev->name, MAC_ARG(sta->addr), prev_rates,
1494 supp_rates, sta->supp_rates);
1495 }
1496 sta_info_put(sta);
1497 }
1498
1499 if (!elems.ssid)
1500 return;
1501
1502 if (elems.ds_params && elems.ds_params_len == 1)
1503 channel = elems.ds_params[0];
1504 else
1505 channel = rx_status->channel;
1506
1507 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1508 elems.ssid, elems.ssid_len);
1509 if (!bss) {
1510 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1511 elems.ssid, elems.ssid_len);
1512 if (!bss)
1513 return;
1514 } else {
1515 #if 0
1516 /* TODO: order by RSSI? */
1517 spin_lock_bh(&local->sta_bss_lock);
1518 list_move_tail(&bss->list, &local->sta_bss_list);
1519 spin_unlock_bh(&local->sta_bss_lock);
1520 #endif
1521 }
1522
1523 if (bss->probe_resp && beacon) {
1524 /* Do not allow beacon to override data from Probe Response. */
1525 ieee80211_rx_bss_put(dev, bss);
1526 return;
1527 }
1528
1529 /* save the ERP value so that it is available at association time */
1530 if (elems.erp_info && elems.erp_info_len >= 1) {
1531 bss->erp_value = elems.erp_info[0];
1532 bss->has_erp_value = 1;
1533 }
1534
1535 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1536 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1537
1538 bss->supp_rates_len = 0;
1539 if (elems.supp_rates) {
1540 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1541 if (clen > elems.supp_rates_len)
1542 clen = elems.supp_rates_len;
1543 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1544 clen);
1545 bss->supp_rates_len += clen;
1546 }
1547 if (elems.ext_supp_rates) {
1548 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1549 if (clen > elems.ext_supp_rates_len)
1550 clen = elems.ext_supp_rates_len;
1551 memcpy(&bss->supp_rates[bss->supp_rates_len],
1552 elems.ext_supp_rates, clen);
1553 bss->supp_rates_len += clen;
1554 }
1555
1556 if (elems.wpa &&
1557 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1558 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1559 kfree(bss->wpa_ie);
1560 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1561 if (bss->wpa_ie) {
1562 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1563 bss->wpa_ie_len = elems.wpa_len + 2;
1564 } else
1565 bss->wpa_ie_len = 0;
1566 } else if (!elems.wpa && bss->wpa_ie) {
1567 kfree(bss->wpa_ie);
1568 bss->wpa_ie = NULL;
1569 bss->wpa_ie_len = 0;
1570 }
1571
1572 if (elems.rsn &&
1573 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1574 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1575 kfree(bss->rsn_ie);
1576 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1577 if (bss->rsn_ie) {
1578 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1579 bss->rsn_ie_len = elems.rsn_len + 2;
1580 } else
1581 bss->rsn_ie_len = 0;
1582 } else if (!elems.rsn && bss->rsn_ie) {
1583 kfree(bss->rsn_ie);
1584 bss->rsn_ie = NULL;
1585 bss->rsn_ie_len = 0;
1586 }
1587
1588 if (elems.wmm_param &&
1589 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1590 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1591 kfree(bss->wmm_ie);
1592 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1593 if (bss->wmm_ie) {
1594 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1595 elems.wmm_param_len + 2);
1596 bss->wmm_ie_len = elems.wmm_param_len + 2;
1597 } else
1598 bss->wmm_ie_len = 0;
1599 } else if (!elems.wmm_param && bss->wmm_ie) {
1600 kfree(bss->wmm_ie);
1601 bss->wmm_ie = NULL;
1602 bss->wmm_ie_len = 0;
1603 }
1604
1605
1606 bss->hw_mode = rx_status->phymode;
1607 bss->freq = rx_status->freq;
1608 if (channel != rx_status->channel &&
1609 (bss->hw_mode == MODE_IEEE80211G ||
1610 bss->hw_mode == MODE_IEEE80211B) &&
1611 channel >= 1 && channel <= 14) {
1612 static const int freq_list[] = {
1613 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1614 2447, 2452, 2457, 2462, 2467, 2472, 2484
1615 };
1616 /* IEEE 802.11g/b mode can receive packets from neighboring
1617 * channels, so map the channel into frequency. */
1618 bss->freq = freq_list[channel - 1];
1619 }
1620 bss->timestamp = timestamp;
1621 bss->last_update = jiffies;
1622 bss->rssi = rx_status->ssi;
1623 bss->signal = rx_status->signal;
1624 bss->noise = rx_status->noise;
1625 if (!beacon)
1626 bss->probe_resp++;
1627 ieee80211_rx_bss_put(dev, bss);
1628 }
1629
1630
1631 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1632 struct ieee80211_mgmt *mgmt,
1633 size_t len,
1634 struct ieee80211_rx_status *rx_status)
1635 {
1636 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1637 }
1638
1639
1640 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1641 struct ieee80211_mgmt *mgmt,
1642 size_t len,
1643 struct ieee80211_rx_status *rx_status)
1644 {
1645 struct ieee80211_sub_if_data *sdata;
1646 struct ieee80211_if_sta *ifsta;
1647 size_t baselen;
1648 struct ieee802_11_elems elems;
1649
1650 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1651
1652 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1653 if (sdata->type != IEEE80211_IF_TYPE_STA)
1654 return;
1655 ifsta = &sdata->u.sta;
1656
1657 if (!ifsta->associated ||
1658 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1659 return;
1660
1661 /* Process beacon from the current BSS */
1662 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1663 if (baselen > len)
1664 return;
1665
1666 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1667
1668 if (elems.erp_info && elems.erp_info_len >= 1)
1669 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1670
1671 if (elems.wmm_param && ifsta->wmm_enabled) {
1672 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1673 elems.wmm_param_len);
1674 }
1675 }
1676
1677
1678 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1679 struct ieee80211_if_sta *ifsta,
1680 struct ieee80211_mgmt *mgmt,
1681 size_t len,
1682 struct ieee80211_rx_status *rx_status)
1683 {
1684 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1685 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1686 int tx_last_beacon;
1687 struct sk_buff *skb;
1688 struct ieee80211_mgmt *resp;
1689 u8 *pos, *end;
1690
1691 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1692 ifsta->state != IEEE80211_IBSS_JOINED ||
1693 len < 24 + 2 || !ifsta->probe_resp)
1694 return;
1695
1696 if (local->ops->tx_last_beacon)
1697 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1698 else
1699 tx_last_beacon = 1;
1700
1701 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1702 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1703 MAC_FMT " (tx_last_beacon=%d)\n",
1704 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1705 MAC_ARG(mgmt->bssid), tx_last_beacon);
1706 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1707
1708 if (!tx_last_beacon)
1709 return;
1710
1711 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1712 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1713 return;
1714
1715 end = ((u8 *) mgmt) + len;
1716 pos = mgmt->u.probe_req.variable;
1717 if (pos[0] != WLAN_EID_SSID ||
1718 pos + 2 + pos[1] > end) {
1719 if (net_ratelimit()) {
1720 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1721 "from " MAC_FMT "\n",
1722 dev->name, MAC_ARG(mgmt->sa));
1723 }
1724 return;
1725 }
1726 if (pos[1] != 0 &&
1727 (pos[1] != ifsta->ssid_len ||
1728 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1729 /* Ignore ProbeReq for foreign SSID */
1730 return;
1731 }
1732
1733 /* Reply with ProbeResp */
1734 skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1735 if (!skb)
1736 return;
1737
1738 resp = (struct ieee80211_mgmt *) skb->data;
1739 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1740 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1741 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1742 dev->name, MAC_ARG(resp->da));
1743 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1744 ieee80211_sta_tx(dev, skb, 0);
1745 }
1746
1747
1748 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1749 struct ieee80211_rx_status *rx_status)
1750 {
1751 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1752 struct ieee80211_sub_if_data *sdata;
1753 struct ieee80211_if_sta *ifsta;
1754 struct ieee80211_mgmt *mgmt;
1755 u16 fc;
1756
1757 if (skb->len < 24)
1758 goto fail;
1759
1760 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1761 ifsta = &sdata->u.sta;
1762
1763 mgmt = (struct ieee80211_mgmt *) skb->data;
1764 fc = le16_to_cpu(mgmt->frame_control);
1765
1766 switch (fc & IEEE80211_FCTL_STYPE) {
1767 case IEEE80211_STYPE_PROBE_REQ:
1768 case IEEE80211_STYPE_PROBE_RESP:
1769 case IEEE80211_STYPE_BEACON:
1770 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1771 case IEEE80211_STYPE_AUTH:
1772 case IEEE80211_STYPE_ASSOC_RESP:
1773 case IEEE80211_STYPE_REASSOC_RESP:
1774 case IEEE80211_STYPE_DEAUTH:
1775 case IEEE80211_STYPE_DISASSOC:
1776 skb_queue_tail(&ifsta->skb_queue, skb);
1777 queue_work(local->hw.workqueue, &ifsta->work);
1778 return;
1779 default:
1780 printk(KERN_DEBUG "%s: received unknown management frame - "
1781 "stype=%d\n", dev->name,
1782 (fc & IEEE80211_FCTL_STYPE) >> 4);
1783 break;
1784 }
1785
1786 fail:
1787 kfree_skb(skb);
1788 }
1789
1790
1791 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1792 struct sk_buff *skb)
1793 {
1794 struct ieee80211_rx_status *rx_status;
1795 struct ieee80211_sub_if_data *sdata;
1796 struct ieee80211_if_sta *ifsta;
1797 struct ieee80211_mgmt *mgmt;
1798 u16 fc;
1799
1800 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1801 ifsta = &sdata->u.sta;
1802
1803 rx_status = (struct ieee80211_rx_status *) skb->cb;
1804 mgmt = (struct ieee80211_mgmt *) skb->data;
1805 fc = le16_to_cpu(mgmt->frame_control);
1806
1807 switch (fc & IEEE80211_FCTL_STYPE) {
1808 case IEEE80211_STYPE_PROBE_REQ:
1809 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1810 rx_status);
1811 break;
1812 case IEEE80211_STYPE_PROBE_RESP:
1813 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1814 break;
1815 case IEEE80211_STYPE_BEACON:
1816 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1817 break;
1818 case IEEE80211_STYPE_AUTH:
1819 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1820 break;
1821 case IEEE80211_STYPE_ASSOC_RESP:
1822 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1823 break;
1824 case IEEE80211_STYPE_REASSOC_RESP:
1825 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1826 break;
1827 case IEEE80211_STYPE_DEAUTH:
1828 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1829 break;
1830 case IEEE80211_STYPE_DISASSOC:
1831 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1832 break;
1833 }
1834
1835 kfree_skb(skb);
1836 }
1837
1838
1839 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1840 struct ieee80211_rx_status *rx_status)
1841 {
1842 struct ieee80211_mgmt *mgmt;
1843 u16 fc;
1844
1845 if (skb->len < 24) {
1846 dev_kfree_skb(skb);
1847 return;
1848 }
1849
1850 mgmt = (struct ieee80211_mgmt *) skb->data;
1851 fc = le16_to_cpu(mgmt->frame_control);
1852
1853 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1854 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1855 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1856 skb->len, rx_status);
1857 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1858 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1859 rx_status);
1860 }
1861 }
1862
1863 dev_kfree_skb(skb);
1864 }
1865
1866
1867 static int ieee80211_sta_active_ibss(struct net_device *dev)
1868 {
1869 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1870 int active = 0;
1871 struct sta_info *sta;
1872
1873 spin_lock_bh(&local->sta_lock);
1874 list_for_each_entry(sta, &local->sta_list, list) {
1875 if (sta->dev == dev &&
1876 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1877 jiffies)) {
1878 active++;
1879 break;
1880 }
1881 }
1882 spin_unlock_bh(&local->sta_lock);
1883
1884 return active;
1885 }
1886
1887
1888 static void ieee80211_sta_expire(struct net_device *dev)
1889 {
1890 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1891 struct sta_info *sta, *tmp;
1892
1893 spin_lock_bh(&local->sta_lock);
1894 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1895 if (time_after(jiffies, sta->last_rx +
1896 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1897 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1898 "\n", dev->name, MAC_ARG(sta->addr));
1899 sta_info_free(sta, 1);
1900 }
1901 spin_unlock_bh(&local->sta_lock);
1902 }
1903
1904
1905 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1906 struct ieee80211_if_sta *ifsta)
1907 {
1908 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1909
1910 ieee80211_sta_expire(dev);
1911 if (ieee80211_sta_active_ibss(dev))
1912 return;
1913
1914 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1915 "IBSS networks with same SSID (merge)\n", dev->name);
1916 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1917 }
1918
1919
1920 void ieee80211_sta_timer(unsigned long data)
1921 {
1922 struct ieee80211_sub_if_data *sdata =
1923 (struct ieee80211_sub_if_data *) data;
1924 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1925 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1926
1927 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1928 queue_work(local->hw.workqueue, &ifsta->work);
1929 }
1930
1931
1932 void ieee80211_sta_work(struct work_struct *work)
1933 {
1934 struct ieee80211_sub_if_data *sdata =
1935 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1936 struct net_device *dev = sdata->dev;
1937 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1938 struct ieee80211_if_sta *ifsta;
1939 struct sk_buff *skb;
1940
1941 if (!netif_running(dev))
1942 return;
1943
1944 if (local->sta_scanning)
1945 return;
1946
1947 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1948 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1949 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1950 "(type=%d)\n", dev->name, sdata->type);
1951 return;
1952 }
1953 ifsta = &sdata->u.sta;
1954
1955 while ((skb = skb_dequeue(&ifsta->skb_queue)))
1956 ieee80211_sta_rx_queued_mgmt(dev, skb);
1957
1958 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1959 ifsta->state != IEEE80211_ASSOCIATE &&
1960 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1961 ieee80211_sta_start_scan(dev, NULL, 0);
1962 return;
1963 }
1964
1965 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1966 if (ieee80211_sta_config_auth(dev, ifsta))
1967 return;
1968 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1969 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1970 return;
1971
1972 switch (ifsta->state) {
1973 case IEEE80211_DISABLED:
1974 break;
1975 case IEEE80211_AUTHENTICATE:
1976 ieee80211_authenticate(dev, ifsta);
1977 break;
1978 case IEEE80211_ASSOCIATE:
1979 ieee80211_associate(dev, ifsta);
1980 break;
1981 case IEEE80211_ASSOCIATED:
1982 ieee80211_associated(dev, ifsta);
1983 break;
1984 case IEEE80211_IBSS_SEARCH:
1985 ieee80211_sta_find_ibss(dev, ifsta);
1986 break;
1987 case IEEE80211_IBSS_JOINED:
1988 ieee80211_sta_merge_ibss(dev, ifsta);
1989 break;
1990 default:
1991 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
1992 ifsta->state);
1993 break;
1994 }
1995
1996 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1997 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
1998 "mixed-cell disabled - disassociate\n", dev->name);
1999
2000 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2001 ieee80211_set_disassoc(dev, ifsta, 0);
2002 }
2003 }
2004
2005
2006 static void ieee80211_sta_reset_auth(struct net_device *dev,
2007 struct ieee80211_if_sta *ifsta)
2008 {
2009 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2010
2011 if (local->ops->reset_tsf) {
2012 /* Reset own TSF to allow time synchronization work. */
2013 local->ops->reset_tsf(local_to_hw(local));
2014 }
2015
2016 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2017
2018
2019 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2020 ifsta->auth_alg = WLAN_AUTH_OPEN;
2021 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2022 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2023 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2024 ifsta->auth_alg = WLAN_AUTH_LEAP;
2025 else
2026 ifsta->auth_alg = WLAN_AUTH_OPEN;
2027 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2028 ifsta->auth_alg);
2029 ifsta->auth_transaction = -1;
2030 ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2031 netif_carrier_off(dev);
2032 }
2033
2034
2035 void ieee80211_sta_req_auth(struct net_device *dev,
2036 struct ieee80211_if_sta *ifsta)
2037 {
2038 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2039 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2040
2041 if (sdata->type != IEEE80211_IF_TYPE_STA)
2042 return;
2043
2044 if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2045 (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2046 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2047 queue_work(local->hw.workqueue, &ifsta->work);
2048 }
2049 }
2050
2051 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2052 const char *ssid, int ssid_len)
2053 {
2054 int tmp, hidden_ssid;
2055
2056 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2057 return 1;
2058
2059 if (ifsta->auto_bssid_sel)
2060 return 0;
2061
2062 hidden_ssid = 1;
2063 tmp = ssid_len;
2064 while (tmp--) {
2065 if (ssid[tmp] != '\0') {
2066 hidden_ssid = 0;
2067 break;
2068 }
2069 }
2070
2071 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2072 return 1;
2073
2074 if (ssid_len == 1 && ssid[0] == ' ')
2075 return 1;
2076
2077 return 0;
2078 }
2079
2080 static int ieee80211_sta_config_auth(struct net_device *dev,
2081 struct ieee80211_if_sta *ifsta)
2082 {
2083 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2085 struct ieee80211_sta_bss *bss, *selected = NULL;
2086 int top_rssi = 0, freq;
2087
2088 if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2089 !ifsta->auto_ssid_sel) {
2090 ifsta->state = IEEE80211_AUTHENTICATE;
2091 ieee80211_sta_reset_auth(dev, ifsta);
2092 return 0;
2093 }
2094
2095 spin_lock_bh(&local->sta_bss_lock);
2096 freq = local->oper_channel->freq;
2097 list_for_each_entry(bss, &local->sta_bss_list, list) {
2098 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2099 continue;
2100
2101 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2102 !!sdata->default_key)
2103 continue;
2104
2105 if (!ifsta->auto_channel_sel && bss->freq != freq)
2106 continue;
2107
2108 if (!ifsta->auto_bssid_sel &&
2109 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2110 continue;
2111
2112 if (!ifsta->auto_ssid_sel &&
2113 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2114 continue;
2115
2116 if (!selected || top_rssi < bss->rssi) {
2117 selected = bss;
2118 top_rssi = bss->rssi;
2119 }
2120 }
2121 if (selected)
2122 atomic_inc(&selected->users);
2123 spin_unlock_bh(&local->sta_bss_lock);
2124
2125 if (selected) {
2126 ieee80211_set_channel(local, -1, selected->freq);
2127 if (!ifsta->ssid_set)
2128 ieee80211_sta_set_ssid(dev, selected->ssid,
2129 selected->ssid_len);
2130 ieee80211_sta_set_bssid(dev, selected->bssid);
2131 ieee80211_rx_bss_put(dev, selected);
2132 ifsta->state = IEEE80211_AUTHENTICATE;
2133 ieee80211_sta_reset_auth(dev, ifsta);
2134 return 0;
2135 } else {
2136 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2137 if (ifsta->auto_ssid_sel)
2138 ieee80211_sta_start_scan(dev, NULL, 0);
2139 else
2140 ieee80211_sta_start_scan(dev, ifsta->ssid,
2141 ifsta->ssid_len);
2142 ifsta->state = IEEE80211_AUTHENTICATE;
2143 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2144 } else
2145 ifsta->state = IEEE80211_DISABLED;
2146 }
2147 return -1;
2148 }
2149
2150 static int ieee80211_sta_join_ibss(struct net_device *dev,
2151 struct ieee80211_if_sta *ifsta,
2152 struct ieee80211_sta_bss *bss)
2153 {
2154 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155 int res, rates, i, j;
2156 struct sk_buff *skb;
2157 struct ieee80211_mgmt *mgmt;
2158 struct ieee80211_tx_control control;
2159 struct ieee80211_rate *rate;
2160 struct ieee80211_hw_mode *mode;
2161 struct rate_control_extra extra;
2162 u8 *pos;
2163 struct ieee80211_sub_if_data *sdata;
2164
2165 /* Remove possible STA entries from other IBSS networks. */
2166 sta_info_flush(local, NULL);
2167
2168 if (local->ops->reset_tsf) {
2169 /* Reset own TSF to allow time synchronization work. */
2170 local->ops->reset_tsf(local_to_hw(local));
2171 }
2172 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2173 res = ieee80211_if_config(dev);
2174 if (res)
2175 return res;
2176
2177 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2178
2179 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2180 sdata->drop_unencrypted = bss->capability &
2181 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2182
2183 res = ieee80211_set_channel(local, -1, bss->freq);
2184
2185 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2186 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2187 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2188 local->hw.conf.freq);
2189 return -1;
2190 }
2191
2192 /* Set beacon template based on scan results */
2193 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2194 do {
2195 if (!skb)
2196 break;
2197
2198 skb_reserve(skb, local->hw.extra_tx_headroom);
2199
2200 mgmt = (struct ieee80211_mgmt *)
2201 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2202 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2203 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2204 IEEE80211_STYPE_BEACON);
2205 memset(mgmt->da, 0xff, ETH_ALEN);
2206 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2207 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2208 mgmt->u.beacon.beacon_int =
2209 cpu_to_le16(local->hw.conf.beacon_int);
2210 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2211
2212 pos = skb_put(skb, 2 + ifsta->ssid_len);
2213 *pos++ = WLAN_EID_SSID;
2214 *pos++ = ifsta->ssid_len;
2215 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2216
2217 rates = bss->supp_rates_len;
2218 if (rates > 8)
2219 rates = 8;
2220 pos = skb_put(skb, 2 + rates);
2221 *pos++ = WLAN_EID_SUPP_RATES;
2222 *pos++ = rates;
2223 memcpy(pos, bss->supp_rates, rates);
2224
2225 pos = skb_put(skb, 2 + 1);
2226 *pos++ = WLAN_EID_DS_PARAMS;
2227 *pos++ = 1;
2228 *pos++ = bss->channel;
2229
2230 pos = skb_put(skb, 2 + 2);
2231 *pos++ = WLAN_EID_IBSS_PARAMS;
2232 *pos++ = 2;
2233 /* FIX: set ATIM window based on scan results */
2234 *pos++ = 0;
2235 *pos++ = 0;
2236
2237 if (bss->supp_rates_len > 8) {
2238 rates = bss->supp_rates_len - 8;
2239 pos = skb_put(skb, 2 + rates);
2240 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2241 *pos++ = rates;
2242 memcpy(pos, &bss->supp_rates[8], rates);
2243 }
2244
2245 memset(&control, 0, sizeof(control));
2246 memset(&extra, 0, sizeof(extra));
2247 extra.mode = local->oper_hw_mode;
2248 rate = rate_control_get_rate(local, dev, skb, &extra);
2249 if (!rate) {
2250 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2251 "for IBSS beacon\n", dev->name);
2252 break;
2253 }
2254 control.tx_rate = (local->short_preamble &&
2255 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2256 rate->val2 : rate->val;
2257 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2258 control.power_level = local->hw.conf.power_level;
2259 control.flags |= IEEE80211_TXCTL_NO_ACK;
2260 control.retry_limit = 1;
2261
2262 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2263 if (ifsta->probe_resp) {
2264 mgmt = (struct ieee80211_mgmt *)
2265 ifsta->probe_resp->data;
2266 mgmt->frame_control =
2267 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2268 IEEE80211_STYPE_PROBE_RESP);
2269 } else {
2270 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2271 "template for IBSS\n", dev->name);
2272 }
2273
2274 if (local->ops->beacon_update &&
2275 local->ops->beacon_update(local_to_hw(local),
2276 skb, &control) == 0) {
2277 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2278 "template based on scan results\n", dev->name);
2279 skb = NULL;
2280 }
2281
2282 rates = 0;
2283 mode = local->oper_hw_mode;
2284 for (i = 0; i < bss->supp_rates_len; i++) {
2285 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2286 if (mode->mode == MODE_ATHEROS_TURBO)
2287 bitrate *= 2;
2288 for (j = 0; j < mode->num_rates; j++)
2289 if (mode->rates[j].rate == bitrate)
2290 rates |= BIT(j);
2291 }
2292 ifsta->supp_rates_bits = rates;
2293 } while (0);
2294
2295 if (skb) {
2296 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2297 "template\n", dev->name);
2298 dev_kfree_skb(skb);
2299 }
2300
2301 ifsta->state = IEEE80211_IBSS_JOINED;
2302 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2303
2304 ieee80211_rx_bss_put(dev, bss);
2305
2306 return res;
2307 }
2308
2309
2310 static int ieee80211_sta_create_ibss(struct net_device *dev,
2311 struct ieee80211_if_sta *ifsta)
2312 {
2313 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2314 struct ieee80211_sta_bss *bss;
2315 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2316 struct ieee80211_hw_mode *mode;
2317 u8 bssid[ETH_ALEN], *pos;
2318 int i;
2319
2320 #if 0
2321 /* Easier testing, use fixed BSSID. */
2322 memset(bssid, 0xfe, ETH_ALEN);
2323 #else
2324 /* Generate random, not broadcast, locally administered BSSID. Mix in
2325 * own MAC address to make sure that devices that do not have proper
2326 * random number generator get different BSSID. */
2327 get_random_bytes(bssid, ETH_ALEN);
2328 for (i = 0; i < ETH_ALEN; i++)
2329 bssid[i] ^= dev->dev_addr[i];
2330 bssid[0] &= ~0x01;
2331 bssid[0] |= 0x02;
2332 #endif
2333
2334 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2335 dev->name, MAC_ARG(bssid));
2336
2337 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2338 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2339 if (!bss)
2340 return -ENOMEM;
2341
2342 mode = local->oper_hw_mode;
2343
2344 if (local->hw.conf.beacon_int == 0)
2345 local->hw.conf.beacon_int = 100;
2346 bss->beacon_int = local->hw.conf.beacon_int;
2347 bss->hw_mode = local->hw.conf.phymode;
2348 bss->freq = local->hw.conf.freq;
2349 bss->last_update = jiffies;
2350 bss->capability = WLAN_CAPABILITY_IBSS;
2351 if (sdata->default_key) {
2352 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2353 } else
2354 sdata->drop_unencrypted = 0;
2355 bss->supp_rates_len = mode->num_rates;
2356 pos = bss->supp_rates;
2357 for (i = 0; i < mode->num_rates; i++) {
2358 int rate = mode->rates[i].rate;
2359 if (mode->mode == MODE_ATHEROS_TURBO)
2360 rate /= 2;
2361 *pos++ = (u8) (rate / 5);
2362 }
2363
2364 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2365 }
2366
2367
2368 static int ieee80211_sta_find_ibss(struct net_device *dev,
2369 struct ieee80211_if_sta *ifsta)
2370 {
2371 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2372 struct ieee80211_sta_bss *bss;
2373 int found = 0;
2374 u8 bssid[ETH_ALEN];
2375 int active_ibss;
2376
2377 if (ifsta->ssid_len == 0)
2378 return -EINVAL;
2379
2380 active_ibss = ieee80211_sta_active_ibss(dev);
2381 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2382 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2383 dev->name, active_ibss);
2384 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2385 spin_lock_bh(&local->sta_bss_lock);
2386 list_for_each_entry(bss, &local->sta_bss_list, list) {
2387 if (ifsta->ssid_len != bss->ssid_len ||
2388 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2389 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2390 continue;
2391 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2392 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2393 MAC_ARG(bss->bssid));
2394 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2395 memcpy(bssid, bss->bssid, ETH_ALEN);
2396 found = 1;
2397 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2398 break;
2399 }
2400 spin_unlock_bh(&local->sta_bss_lock);
2401
2402 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2403 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2404 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2405 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2406 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2407 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2408 ifsta->ssid, ifsta->ssid_len))) {
2409 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2410 " based on configured SSID\n",
2411 dev->name, MAC_ARG(bssid));
2412 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2413 }
2414 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2415 printk(KERN_DEBUG " did not try to join ibss\n");
2416 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2417
2418 /* Selected IBSS not found in current scan results - try to scan */
2419 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2420 !ieee80211_sta_active_ibss(dev)) {
2421 mod_timer(&ifsta->timer, jiffies +
2422 IEEE80211_IBSS_MERGE_INTERVAL);
2423 } else if (time_after(jiffies, local->last_scan_completed +
2424 IEEE80211_SCAN_INTERVAL)) {
2425 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2426 "join\n", dev->name);
2427 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2428 ifsta->ssid_len);
2429 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2430 int interval = IEEE80211_SCAN_INTERVAL;
2431
2432 if (time_after(jiffies, ifsta->ibss_join_req +
2433 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2434 if (ifsta->create_ibss &&
2435 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2436 return ieee80211_sta_create_ibss(dev, ifsta);
2437 if (ifsta->create_ibss) {
2438 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2439 " configured channel %d (%d MHz)\n",
2440 dev->name, local->hw.conf.channel,
2441 local->hw.conf.freq);
2442 }
2443
2444 /* No IBSS found - decrease scan interval and continue
2445 * scanning. */
2446 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2447 }
2448
2449 ifsta->state = IEEE80211_IBSS_SEARCH;
2450 mod_timer(&ifsta->timer, jiffies + interval);
2451 return 0;
2452 }
2453
2454 return 0;
2455 }
2456
2457
2458 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2459 {
2460 struct ieee80211_sub_if_data *sdata;
2461 struct ieee80211_if_sta *ifsta;
2462 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2463
2464 if (len > IEEE80211_MAX_SSID_LEN)
2465 return -EINVAL;
2466
2467 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2468 * not defined. */
2469 if (local->ops->conf_tx) {
2470 struct ieee80211_tx_queue_params qparam;
2471 int i;
2472
2473 memset(&qparam, 0, sizeof(qparam));
2474 /* TODO: are these ok defaults for all hw_modes? */
2475 qparam.aifs = 2;
2476 qparam.cw_min =
2477 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2478 qparam.cw_max = 1023;
2479 qparam.burst_time = 0;
2480 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2481 {
2482 local->ops->conf_tx(local_to_hw(local),
2483 i + IEEE80211_TX_QUEUE_DATA0,
2484 &qparam);
2485 }
2486 /* IBSS uses different parameters for Beacon sending */
2487 qparam.cw_min++;
2488 qparam.cw_min *= 2;
2489 qparam.cw_min--;
2490 local->ops->conf_tx(local_to_hw(local),
2491 IEEE80211_TX_QUEUE_BEACON, &qparam);
2492 }
2493
2494 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2495 ifsta = &sdata->u.sta;
2496
2497 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2498 ifsta->prev_bssid_set = 0;
2499 memcpy(ifsta->ssid, ssid, len);
2500 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2501 ifsta->ssid_len = len;
2502
2503 ifsta->ssid_set = len ? 1 : 0;
2504 if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2505 ifsta->ibss_join_req = jiffies;
2506 ifsta->state = IEEE80211_IBSS_SEARCH;
2507 return ieee80211_sta_find_ibss(dev, ifsta);
2508 }
2509 return 0;
2510 }
2511
2512
2513 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2514 {
2515 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2516 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2517 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2518 *len = ifsta->ssid_len;
2519 return 0;
2520 }
2521
2522
2523 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2524 {
2525 struct ieee80211_sub_if_data *sdata;
2526 struct ieee80211_if_sta *ifsta;
2527 int res;
2528
2529 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2530 ifsta = &sdata->u.sta;
2531
2532 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2533 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2534 res = ieee80211_if_config(dev);
2535 if (res) {
2536 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2537 "the low-level driver\n", dev->name);
2538 return res;
2539 }
2540 }
2541
2542 if (!is_valid_ether_addr(bssid))
2543 ifsta->bssid_set = 0;
2544 else
2545 ifsta->bssid_set = 1;
2546 return 0;
2547 }
2548
2549
2550 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2551 struct ieee80211_sub_if_data *sdata,
2552 int powersave)
2553 {
2554 struct sk_buff *skb;
2555 struct ieee80211_hdr *nullfunc;
2556 u16 fc;
2557
2558 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2559 if (!skb) {
2560 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2561 "frame\n", sdata->dev->name);
2562 return;
2563 }
2564 skb_reserve(skb, local->hw.extra_tx_headroom);
2565
2566 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2567 memset(nullfunc, 0, 24);
2568 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2569 IEEE80211_FCTL_TODS;
2570 if (powersave)
2571 fc |= IEEE80211_FCTL_PM;
2572 nullfunc->frame_control = cpu_to_le16(fc);
2573 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2574 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2575 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2576
2577 ieee80211_sta_tx(sdata->dev, skb, 0);
2578 }
2579
2580
2581 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2582 {
2583 struct ieee80211_local *local = hw_to_local(hw);
2584 struct net_device *dev = local->scan_dev;
2585 struct ieee80211_sub_if_data *sdata;
2586 union iwreq_data wrqu;
2587
2588 local->last_scan_completed = jiffies;
2589 wmb();
2590 local->sta_scanning = 0;
2591
2592 if (ieee80211_hw_config(local))
2593 printk(KERN_DEBUG "%s: failed to restore operational"
2594 "channel after scan\n", dev->name);
2595
2596 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2597 ieee80211_if_config(dev))
2598 printk(KERN_DEBUG "%s: failed to restore operational"
2599 "BSSID after scan\n", dev->name);
2600
2601 memset(&wrqu, 0, sizeof(wrqu));
2602 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2603
2604 read_lock(&local->sub_if_lock);
2605 list_for_each_entry(sdata, &local->sub_if_list, list) {
2606
2607 /* No need to wake the master device. */
2608 if (sdata->dev == local->mdev)
2609 continue;
2610
2611 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2612 if (sdata->u.sta.associated)
2613 ieee80211_send_nullfunc(local, sdata, 0);
2614 ieee80211_sta_timer((unsigned long)sdata);
2615 }
2616
2617 netif_wake_queue(sdata->dev);
2618 }
2619 read_unlock(&local->sub_if_lock);
2620
2621 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2622 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2623 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2624 if (!ifsta->bssid_set ||
2625 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2626 !ieee80211_sta_active_ibss(dev)))
2627 ieee80211_sta_find_ibss(dev, ifsta);
2628 }
2629 }
2630 EXPORT_SYMBOL(ieee80211_scan_completed);
2631
2632 void ieee80211_sta_scan_work(struct work_struct *work)
2633 {
2634 struct ieee80211_local *local =
2635 container_of(work, struct ieee80211_local, scan_work.work);
2636 struct net_device *dev = local->scan_dev;
2637 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2638 struct ieee80211_hw_mode *mode;
2639 struct ieee80211_channel *chan;
2640 int skip;
2641 unsigned long next_delay = 0;
2642
2643 if (!local->sta_scanning)
2644 return;
2645
2646 switch (local->scan_state) {
2647 case SCAN_SET_CHANNEL:
2648 mode = local->scan_hw_mode;
2649 if (local->scan_hw_mode->list.next == &local->modes_list &&
2650 local->scan_channel_idx >= mode->num_channels) {
2651 ieee80211_scan_completed(local_to_hw(local));
2652 return;
2653 }
2654 skip = !(local->enabled_modes & (1 << mode->mode));
2655 chan = &mode->channels[local->scan_channel_idx];
2656 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2657 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2658 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2659 (local->hw_modes & local->enabled_modes &
2660 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2661 skip = 1;
2662
2663 if (!skip) {
2664 #if 0
2665 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2666 dev->name, chan->chan, chan->freq);
2667 #endif
2668
2669 local->scan_channel = chan;
2670 if (ieee80211_hw_config(local)) {
2671 printk(KERN_DEBUG "%s: failed to set channel "
2672 "%d (%d MHz) for scan\n", dev->name,
2673 chan->chan, chan->freq);
2674 skip = 1;
2675 }
2676 }
2677
2678 local->scan_channel_idx++;
2679 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2680 if (local->scan_hw_mode->list.next != &local->modes_list) {
2681 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2682 struct ieee80211_hw_mode,
2683 list);
2684 local->scan_channel_idx = 0;
2685 }
2686 }
2687
2688 if (skip)
2689 break;
2690
2691 next_delay = IEEE80211_PROBE_DELAY +
2692 usecs_to_jiffies(local->hw.channel_change_time);
2693 local->scan_state = SCAN_SEND_PROBE;
2694 break;
2695 case SCAN_SEND_PROBE:
2696 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2697 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2698 local->scan_ssid_len);
2699 next_delay = IEEE80211_CHANNEL_TIME;
2700 } else
2701 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2702 local->scan_state = SCAN_SET_CHANNEL;
2703 break;
2704 }
2705
2706 if (local->sta_scanning)
2707 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2708 next_delay);
2709 }
2710
2711
2712 static int ieee80211_sta_start_scan(struct net_device *dev,
2713 u8 *ssid, size_t ssid_len)
2714 {
2715 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2716 struct ieee80211_sub_if_data *sdata;
2717
2718 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2719 return -EINVAL;
2720
2721 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2722 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2723 * BSSID: MACAddress
2724 * SSID
2725 * ScanType: ACTIVE, PASSIVE
2726 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2727 * a Probe frame during active scanning
2728 * ChannelList
2729 * MinChannelTime (>= ProbeDelay), in TU
2730 * MaxChannelTime: (>= MinChannelTime), in TU
2731 */
2732
2733 /* MLME-SCAN.confirm
2734 * BSSDescriptionSet
2735 * ResultCode: SUCCESS, INVALID_PARAMETERS
2736 */
2737
2738 if (local->sta_scanning) {
2739 if (local->scan_dev == dev)
2740 return 0;
2741 return -EBUSY;
2742 }
2743
2744 if (local->ops->hw_scan) {
2745 int rc = local->ops->hw_scan(local_to_hw(local),
2746 ssid, ssid_len);
2747 if (!rc) {
2748 local->sta_scanning = 1;
2749 local->scan_dev = dev;
2750 }
2751 return rc;
2752 }
2753
2754 local->sta_scanning = 1;
2755
2756 read_lock(&local->sub_if_lock);
2757 list_for_each_entry(sdata, &local->sub_if_list, list) {
2758
2759 /* Don't stop the master interface, otherwise we can't transmit
2760 * probes! */
2761 if (sdata->dev == local->mdev)
2762 continue;
2763
2764 netif_stop_queue(sdata->dev);
2765 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2766 sdata->u.sta.associated)
2767 ieee80211_send_nullfunc(local, sdata, 1);
2768 }
2769 read_unlock(&local->sub_if_lock);
2770
2771 if (ssid) {
2772 local->scan_ssid_len = ssid_len;
2773 memcpy(local->scan_ssid, ssid, ssid_len);
2774 } else
2775 local->scan_ssid_len = 0;
2776 local->scan_state = SCAN_SET_CHANNEL;
2777 local->scan_hw_mode = list_entry(local->modes_list.next,
2778 struct ieee80211_hw_mode,
2779 list);
2780 local->scan_channel_idx = 0;
2781 local->scan_dev = dev;
2782
2783 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2784 ieee80211_if_config(dev))
2785 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2786 dev->name);
2787
2788 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2789 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2790 IEEE80211_CHANNEL_TIME);
2791
2792 return 0;
2793 }
2794
2795
2796 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2797 {
2798 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2799 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2800 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2801
2802 if (sdata->type != IEEE80211_IF_TYPE_STA)
2803 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2804
2805 if (local->sta_scanning) {
2806 if (local->scan_dev == dev)
2807 return 0;
2808 return -EBUSY;
2809 }
2810
2811 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2812 queue_work(local->hw.workqueue, &ifsta->work);
2813 return 0;
2814 }
2815
2816 static char *
2817 ieee80211_sta_scan_result(struct net_device *dev,
2818 struct ieee80211_sta_bss *bss,
2819 char *current_ev, char *end_buf)
2820 {
2821 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2822 struct iw_event iwe;
2823
2824 if (time_after(jiffies,
2825 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2826 return current_ev;
2827
2828 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2829 return current_ev;
2830
2831 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2832 !bss->wpa_ie && !bss->rsn_ie)
2833 return current_ev;
2834
2835 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2836 (local->scan_ssid_len != bss->ssid_len ||
2837 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2838 return current_ev;
2839
2840 memset(&iwe, 0, sizeof(iwe));
2841 iwe.cmd = SIOCGIWAP;
2842 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2843 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2844 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2845 IW_EV_ADDR_LEN);
2846
2847 memset(&iwe, 0, sizeof(iwe));
2848 iwe.cmd = SIOCGIWESSID;
2849 iwe.u.data.length = bss->ssid_len;
2850 iwe.u.data.flags = 1;
2851 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2852 bss->ssid);
2853
2854 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2855 memset(&iwe, 0, sizeof(iwe));
2856 iwe.cmd = SIOCGIWMODE;
2857 if (bss->capability & WLAN_CAPABILITY_ESS)
2858 iwe.u.mode = IW_MODE_MASTER;
2859 else
2860 iwe.u.mode = IW_MODE_ADHOC;
2861 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2862 IW_EV_UINT_LEN);
2863 }
2864
2865 memset(&iwe, 0, sizeof(iwe));
2866 iwe.cmd = SIOCGIWFREQ;
2867 iwe.u.freq.m = bss->channel;
2868 iwe.u.freq.e = 0;
2869 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2870 IW_EV_FREQ_LEN);
2871 iwe.u.freq.m = bss->freq * 100000;
2872 iwe.u.freq.e = 1;
2873 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2874 IW_EV_FREQ_LEN);
2875
2876 memset(&iwe, 0, sizeof(iwe));
2877 iwe.cmd = IWEVQUAL;
2878 iwe.u.qual.qual = bss->signal;
2879 iwe.u.qual.level = bss->rssi;
2880 iwe.u.qual.noise = bss->noise;
2881 iwe.u.qual.updated = local->wstats_flags;
2882 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2883 IW_EV_QUAL_LEN);
2884
2885 memset(&iwe, 0, sizeof(iwe));
2886 iwe.cmd = SIOCGIWENCODE;
2887 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2888 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2889 else
2890 iwe.u.data.flags = IW_ENCODE_DISABLED;
2891 iwe.u.data.length = 0;
2892 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2893
2894 if (bss && bss->wpa_ie) {
2895 memset(&iwe, 0, sizeof(iwe));
2896 iwe.cmd = IWEVGENIE;
2897 iwe.u.data.length = bss->wpa_ie_len;
2898 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2899 bss->wpa_ie);
2900 }
2901
2902 if (bss && bss->rsn_ie) {
2903 memset(&iwe, 0, sizeof(iwe));
2904 iwe.cmd = IWEVGENIE;
2905 iwe.u.data.length = bss->rsn_ie_len;
2906 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2907 bss->rsn_ie);
2908 }
2909
2910 if (bss && bss->supp_rates_len > 0) {
2911 /* display all supported rates in readable format */
2912 char *p = current_ev + IW_EV_LCP_LEN;
2913 int i;
2914
2915 memset(&iwe, 0, sizeof(iwe));
2916 iwe.cmd = SIOCGIWRATE;
2917 /* Those two flags are ignored... */
2918 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2919
2920 for (i = 0; i < bss->supp_rates_len; i++) {
2921 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2922 0x7f) * 500000);
2923 p = iwe_stream_add_value(current_ev, p,
2924 end_buf, &iwe, IW_EV_PARAM_LEN);
2925 }
2926 current_ev = p;
2927 }
2928
2929 if (bss) {
2930 char *buf;
2931 buf = kmalloc(30, GFP_ATOMIC);
2932 if (buf) {
2933 memset(&iwe, 0, sizeof(iwe));
2934 iwe.cmd = IWEVCUSTOM;
2935 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2936 iwe.u.data.length = strlen(buf);
2937 current_ev = iwe_stream_add_point(current_ev, end_buf,
2938 &iwe, buf);
2939 kfree(buf);
2940 }
2941 }
2942
2943 do {
2944 char *buf;
2945
2946 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2947 break;
2948
2949 buf = kmalloc(100, GFP_ATOMIC);
2950 if (!buf)
2951 break;
2952
2953 memset(&iwe, 0, sizeof(iwe));
2954 iwe.cmd = IWEVCUSTOM;
2955 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2956 iwe.u.data.length = strlen(buf);
2957 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2958 buf);
2959
2960 memset(&iwe, 0, sizeof(iwe));
2961 iwe.cmd = IWEVCUSTOM;
2962 sprintf(buf, "capab=0x%04x", bss->capability);
2963 iwe.u.data.length = strlen(buf);
2964 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2965 buf);
2966
2967 kfree(buf);
2968 break;
2969 } while (0);
2970
2971 return current_ev;
2972 }
2973
2974
2975 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2976 {
2977 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2978 char *current_ev = buf;
2979 char *end_buf = buf + len;
2980 struct ieee80211_sta_bss *bss;
2981
2982 spin_lock_bh(&local->sta_bss_lock);
2983 list_for_each_entry(bss, &local->sta_bss_list, list) {
2984 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
2985 spin_unlock_bh(&local->sta_bss_lock);
2986 return -E2BIG;
2987 }
2988 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
2989 end_buf);
2990 }
2991 spin_unlock_bh(&local->sta_bss_lock);
2992 return current_ev - buf;
2993 }
2994
2995
2996 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
2997 {
2998 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2999 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3000 kfree(ifsta->extra_ie);
3001 if (len == 0) {
3002 ifsta->extra_ie = NULL;
3003 ifsta->extra_ie_len = 0;
3004 return 0;
3005 }
3006 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3007 if (!ifsta->extra_ie) {
3008 ifsta->extra_ie_len = 0;
3009 return -ENOMEM;
3010 }
3011 memcpy(ifsta->extra_ie, ie, len);
3012 ifsta->extra_ie_len = len;
3013 return 0;
3014 }
3015
3016
3017 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3018 struct sk_buff *skb, u8 *bssid,
3019 u8 *addr)
3020 {
3021 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3022 struct sta_info *sta;
3023 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3024
3025 /* TODO: Could consider removing the least recently used entry and
3026 * allow new one to be added. */
3027 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3028 if (net_ratelimit()) {
3029 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3030 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3031 }
3032 return NULL;
3033 }
3034
3035 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3036 local->mdev->name, MAC_ARG(addr), dev->name);
3037
3038 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3039 if (!sta)
3040 return NULL;
3041
3042 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3043
3044 rate_control_rate_init(sta, local);
3045
3046 return sta; /* caller will call sta_info_put() */
3047 }
3048
3049
3050 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3051 {
3052 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3053 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3054
3055 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3056 dev->name, reason);
3057
3058 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3059 sdata->type != IEEE80211_IF_TYPE_IBSS)
3060 return -EINVAL;
3061
3062 ieee80211_send_deauth(dev, ifsta, reason);
3063 ieee80211_set_disassoc(dev, ifsta, 1);
3064 return 0;
3065 }
3066
3067
3068 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3069 {
3070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3071 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3072
3073 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3074 dev->name, reason);
3075
3076 if (sdata->type != IEEE80211_IF_TYPE_STA)
3077 return -EINVAL;
3078
3079 if (!ifsta->associated)
3080 return -1;
3081
3082 ieee80211_send_disassoc(dev, ifsta, reason);
3083 ieee80211_set_disassoc(dev, ifsta, 0);
3084 return 0;
3085 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree