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 "ieee80211_led.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 /* mgmt header + 1 byte action code */
61 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
62
63 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
64 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
65 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
66 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
67 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
68
69 /* next values represent the buffer size for A-MPDU frame.
70 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
71 #define IEEE80211_MIN_AMPDU_BUF 0x8
72 #define IEEE80211_MAX_AMPDU_BUF 0x40
73
74 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
75 u8 *ssid, size_t ssid_len);
76 static struct ieee80211_sta_bss *
77 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
78 u8 *ssid, u8 ssid_len);
79 static void ieee80211_rx_bss_put(struct net_device *dev,
80 struct ieee80211_sta_bss *bss);
81 static int ieee80211_sta_find_ibss(struct net_device *dev,
82 struct ieee80211_if_sta *ifsta);
83 static int ieee80211_sta_wep_configured(struct net_device *dev);
84 static int ieee80211_sta_start_scan(struct net_device *dev,
85 u8 *ssid, size_t ssid_len);
86 static int ieee80211_sta_config_auth(struct net_device *dev,
87 struct ieee80211_if_sta *ifsta);
88
89
90 /* Parsed Information Elements */
91 struct ieee802_11_elems {
92 /* pointers to IEs */
93 u8 *ssid;
94 u8 *supp_rates;
95 u8 *fh_params;
96 u8 *ds_params;
97 u8 *cf_params;
98 u8 *tim;
99 u8 *ibss_params;
100 u8 *challenge;
101 u8 *wpa;
102 u8 *rsn;
103 u8 *erp_info;
104 u8 *ext_supp_rates;
105 u8 *wmm_info;
106 u8 *wmm_param;
107 u8 *ht_cap_elem;
108 u8 *ht_info_elem;
109 /* length of them, respectively */
110 u8 ssid_len;
111 u8 supp_rates_len;
112 u8 fh_params_len;
113 u8 ds_params_len;
114 u8 cf_params_len;
115 u8 tim_len;
116 u8 ibss_params_len;
117 u8 challenge_len;
118 u8 wpa_len;
119 u8 rsn_len;
120 u8 erp_info_len;
121 u8 ext_supp_rates_len;
122 u8 wmm_info_len;
123 u8 wmm_param_len;
124 u8 ht_cap_elem_len;
125 u8 ht_info_elem_len;
126 };
127
128 static void ieee802_11_parse_elems(u8 *start, size_t len,
129 struct ieee802_11_elems *elems)
130 {
131 size_t left = len;
132 u8 *pos = start;
133
134 memset(elems, 0, sizeof(*elems));
135
136 while (left >= 2) {
137 u8 id, elen;
138
139 id = *pos++;
140 elen = *pos++;
141 left -= 2;
142
143 if (elen > left)
144 return;
145
146 switch (id) {
147 case WLAN_EID_SSID:
148 elems->ssid = pos;
149 elems->ssid_len = elen;
150 break;
151 case WLAN_EID_SUPP_RATES:
152 elems->supp_rates = pos;
153 elems->supp_rates_len = elen;
154 break;
155 case WLAN_EID_FH_PARAMS:
156 elems->fh_params = pos;
157 elems->fh_params_len = elen;
158 break;
159 case WLAN_EID_DS_PARAMS:
160 elems->ds_params = pos;
161 elems->ds_params_len = elen;
162 break;
163 case WLAN_EID_CF_PARAMS:
164 elems->cf_params = pos;
165 elems->cf_params_len = elen;
166 break;
167 case WLAN_EID_TIM:
168 elems->tim = pos;
169 elems->tim_len = elen;
170 break;
171 case WLAN_EID_IBSS_PARAMS:
172 elems->ibss_params = pos;
173 elems->ibss_params_len = elen;
174 break;
175 case WLAN_EID_CHALLENGE:
176 elems->challenge = pos;
177 elems->challenge_len = elen;
178 break;
179 case WLAN_EID_WPA:
180 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
181 pos[2] == 0xf2) {
182 /* Microsoft OUI (00:50:F2) */
183 if (pos[3] == 1) {
184 /* OUI Type 1 - WPA IE */
185 elems->wpa = pos;
186 elems->wpa_len = elen;
187 } else if (elen >= 5 && pos[3] == 2) {
188 if (pos[4] == 0) {
189 elems->wmm_info = pos;
190 elems->wmm_info_len = elen;
191 } else if (pos[4] == 1) {
192 elems->wmm_param = pos;
193 elems->wmm_param_len = elen;
194 }
195 }
196 }
197 break;
198 case WLAN_EID_RSN:
199 elems->rsn = pos;
200 elems->rsn_len = elen;
201 break;
202 case WLAN_EID_ERP_INFO:
203 elems->erp_info = pos;
204 elems->erp_info_len = elen;
205 break;
206 case WLAN_EID_EXT_SUPP_RATES:
207 elems->ext_supp_rates = pos;
208 elems->ext_supp_rates_len = elen;
209 break;
210 case WLAN_EID_HT_CAPABILITY:
211 elems->ht_cap_elem = pos;
212 elems->ht_cap_elem_len = elen;
213 break;
214 case WLAN_EID_HT_EXTRA_INFO:
215 elems->ht_info_elem = pos;
216 elems->ht_info_elem_len = elen;
217 break;
218 default:
219 break;
220 }
221
222 left -= elen;
223 pos += elen;
224 }
225 }
226
227
228 static int ecw2cw(int ecw)
229 {
230 int cw = 1;
231 while (ecw > 0) {
232 cw <<= 1;
233 ecw--;
234 }
235 return cw - 1;
236 }
237
238 static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241 {
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(¶ms, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313 }
314
315 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
316 bool use_protection,
317 bool use_short_preamble)
318 {
319 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
320 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
321 DECLARE_MAC_BUF(mac);
322 u32 changed = 0;
323
324 if (use_protection != bss_conf->use_cts_prot) {
325 if (net_ratelimit()) {
326 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
327 "%s)\n",
328 sdata->dev->name,
329 use_protection ? "enabled" : "disabled",
330 print_mac(mac, ifsta->bssid));
331 }
332 bss_conf->use_cts_prot = use_protection;
333 changed |= BSS_CHANGED_ERP_CTS_PROT;
334 }
335
336 if (use_short_preamble != bss_conf->use_short_preamble) {
337 if (net_ratelimit()) {
338 printk(KERN_DEBUG "%s: switched to %s barker preamble"
339 " (BSSID=%s)\n",
340 sdata->dev->name,
341 use_short_preamble ? "short" : "long",
342 print_mac(mac, ifsta->bssid));
343 }
344 bss_conf->use_short_preamble = use_short_preamble;
345 changed |= BSS_CHANGED_ERP_PREAMBLE;
346 }
347
348 return changed;
349 }
350
351 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
352 u8 erp_value)
353 {
354 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
355 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
356
357 return ieee80211_handle_protect_preamb(sdata,
358 use_protection, use_short_preamble);
359 }
360
361 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
362 struct ieee80211_sta_bss *bss)
363 {
364 u32 changed = 0;
365
366 if (bss->has_erp_value)
367 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
368 else {
369 u16 capab = bss->capability;
370 changed |= ieee80211_handle_protect_preamb(sdata, false,
371 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
372 }
373
374 return changed;
375 }
376
377 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
378 struct ieee80211_ht_info *ht_info)
379 {
380
381 if (ht_info == NULL)
382 return -EINVAL;
383
384 memset(ht_info, 0, sizeof(*ht_info));
385
386 if (ht_cap_ie) {
387 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
388
389 ht_info->ht_supported = 1;
390 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
391 ht_info->ampdu_factor =
392 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
393 ht_info->ampdu_density =
394 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
395 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
396 } else
397 ht_info->ht_supported = 0;
398
399 return 0;
400 }
401
402 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
403 struct ieee80211_ht_addt_info *ht_add_info_ie,
404 struct ieee80211_ht_bss_info *bss_info)
405 {
406 if (bss_info == NULL)
407 return -EINVAL;
408
409 memset(bss_info, 0, sizeof(*bss_info));
410
411 if (ht_add_info_ie) {
412 u16 op_mode;
413 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
414
415 bss_info->primary_channel = ht_add_info_ie->control_chan;
416 bss_info->bss_cap = ht_add_info_ie->ht_param;
417 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
418 }
419
420 return 0;
421 }
422
423 static void ieee80211_sta_send_associnfo(struct net_device *dev,
424 struct ieee80211_if_sta *ifsta)
425 {
426 char *buf;
427 size_t len;
428 int i;
429 union iwreq_data wrqu;
430
431 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
432 return;
433
434 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
435 ifsta->assocresp_ies_len), GFP_KERNEL);
436 if (!buf)
437 return;
438
439 len = sprintf(buf, "ASSOCINFO(");
440 if (ifsta->assocreq_ies) {
441 len += sprintf(buf + len, "ReqIEs=");
442 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
443 len += sprintf(buf + len, "%02x",
444 ifsta->assocreq_ies[i]);
445 }
446 }
447 if (ifsta->assocresp_ies) {
448 if (ifsta->assocreq_ies)
449 len += sprintf(buf + len, " ");
450 len += sprintf(buf + len, "RespIEs=");
451 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
452 len += sprintf(buf + len, "%02x",
453 ifsta->assocresp_ies[i]);
454 }
455 }
456 len += sprintf(buf + len, ")");
457
458 if (len > IW_CUSTOM_MAX) {
459 len = sprintf(buf, "ASSOCRESPIE=");
460 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
461 len += sprintf(buf + len, "%02x",
462 ifsta->assocresp_ies[i]);
463 }
464 }
465
466 memset(&wrqu, 0, sizeof(wrqu));
467 wrqu.data.length = len;
468 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
469
470 kfree(buf);
471 }
472
473
474 static void ieee80211_set_associated(struct net_device *dev,
475 struct ieee80211_if_sta *ifsta,
476 bool assoc)
477 {
478 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
479 struct ieee80211_local *local = sdata->local;
480 union iwreq_data wrqu;
481 u32 changed = BSS_CHANGED_ASSOC;
482
483 if (assoc) {
484 struct ieee80211_sta_bss *bss;
485
486 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
487
488 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
489 return;
490
491 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
492 local->hw.conf.channel,
493 ifsta->ssid, ifsta->ssid_len);
494 if (bss) {
495 changed |= ieee80211_handle_bss_capability(sdata, bss);
496 ieee80211_rx_bss_put(dev, bss);
497 }
498
499 netif_carrier_on(dev);
500 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
501 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
502 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
503 ieee80211_sta_send_associnfo(dev, ifsta);
504 } else {
505 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
506
507 netif_carrier_off(dev);
508 ieee80211_reset_erp_info(dev);
509 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
510 }
511 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
512 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
513 ifsta->last_probe = jiffies;
514 ieee80211_led_assoc(local, assoc);
515
516 ieee80211_bss_info_change_notify(sdata, changed);
517 }
518
519 static void ieee80211_set_disassoc(struct net_device *dev,
520 struct ieee80211_if_sta *ifsta, int deauth)
521 {
522 if (deauth)
523 ifsta->auth_tries = 0;
524 ifsta->assoc_tries = 0;
525 ieee80211_set_associated(dev, ifsta, 0);
526 }
527
528 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
529 int encrypt)
530 {
531 struct ieee80211_sub_if_data *sdata;
532 struct ieee80211_tx_packet_data *pkt_data;
533
534 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
535 skb->dev = sdata->local->mdev;
536 skb_set_mac_header(skb, 0);
537 skb_set_network_header(skb, 0);
538 skb_set_transport_header(skb, 0);
539
540 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
541 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
542 pkt_data->ifindex = sdata->dev->ifindex;
543 if (!encrypt)
544 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
545
546 dev_queue_xmit(skb);
547 }
548
549
550 static void ieee80211_send_auth(struct net_device *dev,
551 struct ieee80211_if_sta *ifsta,
552 int transaction, u8 *extra, size_t extra_len,
553 int encrypt)
554 {
555 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
556 struct sk_buff *skb;
557 struct ieee80211_mgmt *mgmt;
558
559 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
560 sizeof(*mgmt) + 6 + extra_len);
561 if (!skb) {
562 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
563 "frame\n", dev->name);
564 return;
565 }
566 skb_reserve(skb, local->hw.extra_tx_headroom);
567
568 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
569 memset(mgmt, 0, 24 + 6);
570 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
571 IEEE80211_STYPE_AUTH);
572 if (encrypt)
573 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
574 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
575 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
576 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
577 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
578 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
579 ifsta->auth_transaction = transaction + 1;
580 mgmt->u.auth.status_code = cpu_to_le16(0);
581 if (extra)
582 memcpy(skb_put(skb, extra_len), extra, extra_len);
583
584 ieee80211_sta_tx(dev, skb, encrypt);
585 }
586
587
588 static void ieee80211_authenticate(struct net_device *dev,
589 struct ieee80211_if_sta *ifsta)
590 {
591 DECLARE_MAC_BUF(mac);
592
593 ifsta->auth_tries++;
594 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
595 printk(KERN_DEBUG "%s: authentication with AP %s"
596 " timed out\n",
597 dev->name, print_mac(mac, ifsta->bssid));
598 ifsta->state = IEEE80211_DISABLED;
599 return;
600 }
601
602 ifsta->state = IEEE80211_AUTHENTICATE;
603 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
604 dev->name, print_mac(mac, ifsta->bssid));
605
606 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
607
608 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
609 }
610
611
612 static void ieee80211_send_assoc(struct net_device *dev,
613 struct ieee80211_if_sta *ifsta)
614 {
615 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
616 struct ieee80211_hw_mode *mode;
617 struct sk_buff *skb;
618 struct ieee80211_mgmt *mgmt;
619 u8 *pos, *ies;
620 int i, len;
621 u16 capab;
622 struct ieee80211_sta_bss *bss;
623 int wmm = 0;
624
625 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
626 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
627 ifsta->ssid_len);
628 if (!skb) {
629 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
630 "frame\n", dev->name);
631 return;
632 }
633 skb_reserve(skb, local->hw.extra_tx_headroom);
634
635 mode = local->oper_hw_mode;
636 capab = ifsta->capab;
637 if (mode->mode == MODE_IEEE80211G) {
638 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
639 WLAN_CAPABILITY_SHORT_PREAMBLE;
640 }
641 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
642 ifsta->ssid, ifsta->ssid_len);
643 if (bss) {
644 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
645 capab |= WLAN_CAPABILITY_PRIVACY;
646 if (bss->wmm_ie) {
647 wmm = 1;
648 }
649 ieee80211_rx_bss_put(dev, bss);
650 }
651
652 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
653 memset(mgmt, 0, 24);
654 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
655 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
656 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
657
658 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
659 skb_put(skb, 10);
660 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
661 IEEE80211_STYPE_REASSOC_REQ);
662 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
663 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
664 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
665 ETH_ALEN);
666 } else {
667 skb_put(skb, 4);
668 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
669 IEEE80211_STYPE_ASSOC_REQ);
670 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
671 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
672 }
673
674 /* SSID */
675 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
676 *pos++ = WLAN_EID_SSID;
677 *pos++ = ifsta->ssid_len;
678 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
679
680 len = mode->num_rates;
681 if (len > 8)
682 len = 8;
683 pos = skb_put(skb, len + 2);
684 *pos++ = WLAN_EID_SUPP_RATES;
685 *pos++ = len;
686 for (i = 0; i < len; i++) {
687 int rate = mode->rates[i].rate;
688 *pos++ = (u8) (rate / 5);
689 }
690
691 if (mode->num_rates > len) {
692 pos = skb_put(skb, mode->num_rates - len + 2);
693 *pos++ = WLAN_EID_EXT_SUPP_RATES;
694 *pos++ = mode->num_rates - len;
695 for (i = len; i < mode->num_rates; i++) {
696 int rate = mode->rates[i].rate;
697 *pos++ = (u8) (rate / 5);
698 }
699 }
700
701 if (ifsta->extra_ie) {
702 pos = skb_put(skb, ifsta->extra_ie_len);
703 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
704 }
705
706 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
707 pos = skb_put(skb, 9);
708 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
709 *pos++ = 7; /* len */
710 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
711 *pos++ = 0x50;
712 *pos++ = 0xf2;
713 *pos++ = 2; /* WME */
714 *pos++ = 0; /* WME info */
715 *pos++ = 1; /* WME ver */
716 *pos++ = 0;
717 }
718 /* wmm support is a must to HT */
719 if (wmm && mode->ht_info.ht_supported) {
720 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
721 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
722 *pos++ = WLAN_EID_HT_CAPABILITY;
723 *pos++ = sizeof(struct ieee80211_ht_cap);
724 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
725 memcpy(pos, &tmp, sizeof(u16));
726 pos += sizeof(u16);
727 *pos++ = (mode->ht_info.ampdu_factor |
728 (mode->ht_info.ampdu_density << 2));
729 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
730 }
731
732 kfree(ifsta->assocreq_ies);
733 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
734 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
735 if (ifsta->assocreq_ies)
736 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
737
738 ieee80211_sta_tx(dev, skb, 0);
739 }
740
741
742 static void ieee80211_send_deauth(struct net_device *dev,
743 struct ieee80211_if_sta *ifsta, u16 reason)
744 {
745 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
746 struct sk_buff *skb;
747 struct ieee80211_mgmt *mgmt;
748
749 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
750 if (!skb) {
751 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
752 "frame\n", dev->name);
753 return;
754 }
755 skb_reserve(skb, local->hw.extra_tx_headroom);
756
757 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
758 memset(mgmt, 0, 24);
759 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
760 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
761 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
762 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
763 IEEE80211_STYPE_DEAUTH);
764 skb_put(skb, 2);
765 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
766
767 ieee80211_sta_tx(dev, skb, 0);
768 }
769
770
771 static void ieee80211_send_disassoc(struct net_device *dev,
772 struct ieee80211_if_sta *ifsta, u16 reason)
773 {
774 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
775 struct sk_buff *skb;
776 struct ieee80211_mgmt *mgmt;
777
778 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
779 if (!skb) {
780 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
781 "frame\n", dev->name);
782 return;
783 }
784 skb_reserve(skb, local->hw.extra_tx_headroom);
785
786 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
787 memset(mgmt, 0, 24);
788 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
789 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
790 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
791 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
792 IEEE80211_STYPE_DISASSOC);
793 skb_put(skb, 2);
794 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
795
796 ieee80211_sta_tx(dev, skb, 0);
797 }
798
799
800 static int ieee80211_privacy_mismatch(struct net_device *dev,
801 struct ieee80211_if_sta *ifsta)
802 {
803 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
804 struct ieee80211_sta_bss *bss;
805 int bss_privacy;
806 int wep_privacy;
807 int privacy_invoked;
808
809 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
810 return 0;
811
812 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
813 ifsta->ssid, ifsta->ssid_len);
814 if (!bss)
815 return 0;
816
817 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
818 wep_privacy = !!ieee80211_sta_wep_configured(dev);
819 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
820
821 ieee80211_rx_bss_put(dev, bss);
822
823 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
824 return 0;
825
826 return 1;
827 }
828
829
830 static void ieee80211_associate(struct net_device *dev,
831 struct ieee80211_if_sta *ifsta)
832 {
833 DECLARE_MAC_BUF(mac);
834
835 ifsta->assoc_tries++;
836 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
837 printk(KERN_DEBUG "%s: association with AP %s"
838 " timed out\n",
839 dev->name, print_mac(mac, ifsta->bssid));
840 ifsta->state = IEEE80211_DISABLED;
841 return;
842 }
843
844 ifsta->state = IEEE80211_ASSOCIATE;
845 printk(KERN_DEBUG "%s: associate with AP %s\n",
846 dev->name, print_mac(mac, ifsta->bssid));
847 if (ieee80211_privacy_mismatch(dev, ifsta)) {
848 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
849 "mixed-cell disabled - abort association\n", dev->name);
850 ifsta->state = IEEE80211_DISABLED;
851 return;
852 }
853
854 ieee80211_send_assoc(dev, ifsta);
855
856 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
857 }
858
859
860 static void ieee80211_associated(struct net_device *dev,
861 struct ieee80211_if_sta *ifsta)
862 {
863 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
864 struct sta_info *sta;
865 int disassoc;
866 DECLARE_MAC_BUF(mac);
867
868 /* TODO: start monitoring current AP signal quality and number of
869 * missed beacons. Scan other channels every now and then and search
870 * for better APs. */
871 /* TODO: remove expired BSSes */
872
873 ifsta->state = IEEE80211_ASSOCIATED;
874
875 sta = sta_info_get(local, ifsta->bssid);
876 if (!sta) {
877 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
878 dev->name, print_mac(mac, ifsta->bssid));
879 disassoc = 1;
880 } else {
881 disassoc = 0;
882 if (time_after(jiffies,
883 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
884 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
885 printk(KERN_DEBUG "%s: No ProbeResp from "
886 "current AP %s - assume out of "
887 "range\n",
888 dev->name, print_mac(mac, ifsta->bssid));
889 disassoc = 1;
890 sta_info_free(sta);
891 } else
892 ieee80211_send_probe_req(dev, ifsta->bssid,
893 local->scan_ssid,
894 local->scan_ssid_len);
895 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
896 } else {
897 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
898 if (time_after(jiffies, ifsta->last_probe +
899 IEEE80211_PROBE_INTERVAL)) {
900 ifsta->last_probe = jiffies;
901 ieee80211_send_probe_req(dev, ifsta->bssid,
902 ifsta->ssid,
903 ifsta->ssid_len);
904 }
905 }
906 sta_info_put(sta);
907 }
908 if (disassoc) {
909 ifsta->state = IEEE80211_DISABLED;
910 ieee80211_set_associated(dev, ifsta, 0);
911 } else {
912 mod_timer(&ifsta->timer, jiffies +
913 IEEE80211_MONITORING_INTERVAL);
914 }
915 }
916
917
918 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
919 u8 *ssid, size_t ssid_len)
920 {
921 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
922 struct ieee80211_hw_mode *mode;
923 struct sk_buff *skb;
924 struct ieee80211_mgmt *mgmt;
925 u8 *pos, *supp_rates, *esupp_rates = NULL;
926 int i;
927
928 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
929 if (!skb) {
930 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
931 "request\n", dev->name);
932 return;
933 }
934 skb_reserve(skb, local->hw.extra_tx_headroom);
935
936 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
937 memset(mgmt, 0, 24);
938 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
939 IEEE80211_STYPE_PROBE_REQ);
940 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
941 if (dst) {
942 memcpy(mgmt->da, dst, ETH_ALEN);
943 memcpy(mgmt->bssid, dst, ETH_ALEN);
944 } else {
945 memset(mgmt->da, 0xff, ETH_ALEN);
946 memset(mgmt->bssid, 0xff, ETH_ALEN);
947 }
948 pos = skb_put(skb, 2 + ssid_len);
949 *pos++ = WLAN_EID_SSID;
950 *pos++ = ssid_len;
951 memcpy(pos, ssid, ssid_len);
952
953 supp_rates = skb_put(skb, 2);
954 supp_rates[0] = WLAN_EID_SUPP_RATES;
955 supp_rates[1] = 0;
956 mode = local->oper_hw_mode;
957 for (i = 0; i < mode->num_rates; i++) {
958 struct ieee80211_rate *rate = &mode->rates[i];
959 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
960 continue;
961 if (esupp_rates) {
962 pos = skb_put(skb, 1);
963 esupp_rates[1]++;
964 } else if (supp_rates[1] == 8) {
965 esupp_rates = skb_put(skb, 3);
966 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
967 esupp_rates[1] = 1;
968 pos = &esupp_rates[2];
969 } else {
970 pos = skb_put(skb, 1);
971 supp_rates[1]++;
972 }
973 *pos = rate->rate / 5;
974 }
975
976 ieee80211_sta_tx(dev, skb, 0);
977 }
978
979
980 static int ieee80211_sta_wep_configured(struct net_device *dev)
981 {
982 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
983 if (!sdata || !sdata->default_key ||
984 sdata->default_key->conf.alg != ALG_WEP)
985 return 0;
986 return 1;
987 }
988
989
990 static void ieee80211_auth_completed(struct net_device *dev,
991 struct ieee80211_if_sta *ifsta)
992 {
993 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
994 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
995 ieee80211_associate(dev, ifsta);
996 }
997
998
999 static void ieee80211_auth_challenge(struct net_device *dev,
1000 struct ieee80211_if_sta *ifsta,
1001 struct ieee80211_mgmt *mgmt,
1002 size_t len)
1003 {
1004 u8 *pos;
1005 struct ieee802_11_elems elems;
1006
1007 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1008 pos = mgmt->u.auth.variable;
1009 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1010 if (!elems.challenge) {
1011 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1012 "frame\n", dev->name);
1013 return;
1014 }
1015 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1016 elems.challenge_len + 2, 1);
1017 }
1018
1019 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1020 u8 dialog_token, u16 status, u16 policy,
1021 u16 buf_size, u16 timeout)
1022 {
1023 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1024 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1025 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1026 struct sk_buff *skb;
1027 struct ieee80211_mgmt *mgmt;
1028 u16 capab;
1029
1030 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1031 sizeof(mgmt->u.action.u.addba_resp));
1032 if (!skb) {
1033 printk(KERN_DEBUG "%s: failed to allocate buffer "
1034 "for addba resp frame\n", dev->name);
1035 return;
1036 }
1037
1038 skb_reserve(skb, local->hw.extra_tx_headroom);
1039 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1040 memset(mgmt, 0, 24);
1041 memcpy(mgmt->da, da, ETH_ALEN);
1042 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1043 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1044 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1045 else
1046 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1047 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1048 IEEE80211_STYPE_ACTION);
1049
1050 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1051 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1052 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1053 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1054
1055 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1056 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1057 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1058
1059 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1060 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1061 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1062
1063 ieee80211_sta_tx(dev, skb, 0);
1064
1065 return;
1066 }
1067
1068 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1069 struct ieee80211_mgmt *mgmt,
1070 size_t len)
1071 {
1072 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1073 struct ieee80211_hw *hw = &local->hw;
1074 struct ieee80211_conf *conf = &hw->conf;
1075 struct sta_info *sta;
1076 struct tid_ampdu_rx *tid_agg_rx;
1077 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1078 u8 dialog_token;
1079 int ret = -EOPNOTSUPP;
1080 DECLARE_MAC_BUF(mac);
1081
1082 sta = sta_info_get(local, mgmt->sa);
1083 if (!sta)
1084 return;
1085
1086 /* extract session parameters from addba request frame */
1087 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1088 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1089 start_seq_num =
1090 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1091
1092 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1093 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1094 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1095 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1096
1097 status = WLAN_STATUS_REQUEST_DECLINED;
1098
1099 /* sanity check for incoming parameters:
1100 * check if configuration can support the BA policy
1101 * and if buffer size does not exceeds max value */
1102 if (((ba_policy != 1)
1103 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1104 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1105 status = WLAN_STATUS_INVALID_QOS_PARAM;
1106 #ifdef CONFIG_MAC80211_HT_DEBUG
1107 if (net_ratelimit())
1108 printk(KERN_DEBUG "Block Ack Req with bad params from "
1109 "%s on tid %u. policy %d, buffer size %d\n",
1110 print_mac(mac, mgmt->sa), tid, ba_policy,
1111 buf_size);
1112 #endif /* CONFIG_MAC80211_HT_DEBUG */
1113 goto end_no_lock;
1114 }
1115 /* determine default buffer size */
1116 if (buf_size == 0) {
1117 struct ieee80211_hw_mode *mode = conf->mode;
1118 buf_size = IEEE80211_MIN_AMPDU_BUF;
1119 buf_size = buf_size << mode->ht_info.ampdu_factor;
1120 }
1121
1122 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1123
1124 /* examine state machine */
1125 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1126
1127 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1128 #ifdef CONFIG_MAC80211_HT_DEBUG
1129 if (net_ratelimit())
1130 printk(KERN_DEBUG "unexpected Block Ack Req from "
1131 "%s on tid %u\n",
1132 print_mac(mac, mgmt->sa), tid);
1133 #endif /* CONFIG_MAC80211_HT_DEBUG */
1134 goto end;
1135 }
1136
1137 /* prepare reordering buffer */
1138 tid_agg_rx->reorder_buf =
1139 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1140 if (!tid_agg_rx->reorder_buf) {
1141 if (net_ratelimit())
1142 printk(KERN_ERR "can not allocate reordering buffer "
1143 "to tid %d\n", tid);
1144 goto end;
1145 }
1146 memset(tid_agg_rx->reorder_buf, 0,
1147 buf_size * sizeof(struct sk_buf *));
1148
1149 if (local->ops->ampdu_action)
1150 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1151 sta->addr, tid, start_seq_num);
1152 #ifdef CONFIG_MAC80211_HT_DEBUG
1153 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1154 #endif /* CONFIG_MAC80211_HT_DEBUG */
1155
1156 if (ret) {
1157 kfree(tid_agg_rx->reorder_buf);
1158 goto end;
1159 }
1160
1161 /* change state and send addba resp */
1162 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1163 tid_agg_rx->dialog_token = dialog_token;
1164 tid_agg_rx->ssn = start_seq_num;
1165 tid_agg_rx->head_seq_num = start_seq_num;
1166 tid_agg_rx->buf_size = buf_size;
1167 tid_agg_rx->timeout = timeout;
1168 tid_agg_rx->stored_mpdu_num = 0;
1169 status = WLAN_STATUS_SUCCESS;
1170 end:
1171 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1172
1173 end_no_lock:
1174 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1175 status, 1, buf_size, timeout);
1176 sta_info_put(sta);
1177 }
1178
1179 static void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1180 u16 initiator, u16 reason_code)
1181 {
1182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1183 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1184 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1185 struct sk_buff *skb;
1186 struct ieee80211_mgmt *mgmt;
1187 u16 params;
1188
1189 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1190 sizeof(mgmt->u.action.u.delba));
1191
1192 if (!skb) {
1193 printk(KERN_ERR "%s: failed to allocate buffer "
1194 "for delba frame\n", dev->name);
1195 return;
1196 }
1197
1198 skb_reserve(skb, local->hw.extra_tx_headroom);
1199 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1200 memset(mgmt, 0, 24);
1201 memcpy(mgmt->da, da, ETH_ALEN);
1202 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1203 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1204 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1205 else
1206 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1207 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1208 IEEE80211_STYPE_ACTION);
1209
1210 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1211
1212 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1213 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1214 params = (u16)(initiator << 11); /* bit 11 initiator */
1215 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1216
1217 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1218 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1219
1220 ieee80211_sta_tx(dev, skb, 0);
1221 }
1222
1223 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1224 u16 initiator, u16 reason)
1225 {
1226 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1227 struct ieee80211_hw *hw = &local->hw;
1228 struct sta_info *sta;
1229 int ret, i;
1230
1231 sta = sta_info_get(local, ra);
1232 if (!sta)
1233 return;
1234
1235 /* check if TID is in operational state */
1236 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1237 if (sta->ampdu_mlme.tid_rx[tid].state
1238 != HT_AGG_STATE_OPERATIONAL) {
1239 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1240 sta_info_put(sta);
1241 return;
1242 }
1243 sta->ampdu_mlme.tid_rx[tid].state =
1244 HT_AGG_STATE_REQ_STOP_BA_MSK |
1245 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1246 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1247
1248 /* stop HW Rx aggregation. ampdu_action existence
1249 * already verified in session init so we add the BUG_ON */
1250 BUG_ON(!local->ops->ampdu_action);
1251
1252 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1253 ra, tid, EINVAL);
1254 if (ret)
1255 printk(KERN_DEBUG "HW problem - can not stop rx "
1256 "aggergation for tid %d\n", tid);
1257
1258 /* shutdown timer has not expired */
1259 if (initiator != WLAN_BACK_TIMER)
1260 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1261 session_timer);
1262
1263 /* check if this is a self generated aggregation halt */
1264 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1265 ieee80211_send_delba(dev, ra, tid, 0, reason);
1266
1267 /* free the reordering buffer */
1268 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1269 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1270 /* release the reordered frames */
1271 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1272 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1273 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1274 }
1275 }
1276 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1277
1278 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1279 sta_info_put(sta);
1280 }
1281
1282 static void ieee80211_sta_process_delba(struct net_device *dev,
1283 struct ieee80211_mgmt *mgmt, size_t len)
1284 {
1285 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1286 struct sta_info *sta;
1287 u16 tid, params;
1288 u16 initiator;
1289 DECLARE_MAC_BUF(mac);
1290
1291 sta = sta_info_get(local, mgmt->sa);
1292 if (!sta)
1293 return;
1294
1295 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1296 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1297 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1298
1299 #ifdef CONFIG_MAC80211_HT_DEBUG
1300 if (net_ratelimit())
1301 printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
1302 print_mac(mac, mgmt->sa), tid,
1303 mgmt->u.action.u.delba.reason_code);
1304 #endif /* CONFIG_MAC80211_HT_DEBUG */
1305
1306 if (initiator == WLAN_BACK_INITIATOR)
1307 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1308 WLAN_BACK_INITIATOR, 0);
1309 sta_info_put(sta);
1310 }
1311
1312 /*
1313 * After receiving Block Ack Request (BAR) we activated a
1314 * timer after each frame arrives from the originator.
1315 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1316 */
1317 void sta_rx_agg_session_timer_expired(unsigned long data)
1318 {
1319 /* not an elegant detour, but there is no choice as the timer passes
1320 * only one argument, and verious sta_info are needed here, so init
1321 * flow in sta_info_add gives the TID as data, while the timer_to_id
1322 * array gives the sta through container_of */
1323 u8 *ptid = (u8 *)data;
1324 u8 *timer_to_id = ptid - *ptid;
1325 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1326 timer_to_tid[0]);
1327
1328 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1329 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1330 WLAN_BACK_TIMER,
1331 WLAN_REASON_QSTA_TIMEOUT);
1332 }
1333
1334
1335 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1336 struct ieee80211_if_sta *ifsta,
1337 struct ieee80211_mgmt *mgmt,
1338 size_t len)
1339 {
1340 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1341 u16 auth_alg, auth_transaction, status_code;
1342 DECLARE_MAC_BUF(mac);
1343
1344 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1345 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1346 printk(KERN_DEBUG "%s: authentication frame received from "
1347 "%s, but not in authenticate state - ignored\n",
1348 dev->name, print_mac(mac, mgmt->sa));
1349 return;
1350 }
1351
1352 if (len < 24 + 6) {
1353 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1354 "received from %s - ignored\n",
1355 dev->name, len, print_mac(mac, mgmt->sa));
1356 return;
1357 }
1358
1359 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1360 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1361 printk(KERN_DEBUG "%s: authentication frame received from "
1362 "unknown AP (SA=%s BSSID=%s) - "
1363 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1364 print_mac(mac, mgmt->bssid));
1365 return;
1366 }
1367
1368 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1369 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1370 printk(KERN_DEBUG "%s: authentication frame received from "
1371 "unknown BSSID (SA=%s BSSID=%s) - "
1372 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1373 print_mac(mac, mgmt->bssid));
1374 return;
1375 }
1376
1377 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1378 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1379 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1380
1381 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1382 "transaction=%d status=%d)\n",
1383 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1384 auth_transaction, status_code);
1385
1386 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1387 /* IEEE 802.11 standard does not require authentication in IBSS
1388 * networks and most implementations do not seem to use it.
1389 * However, try to reply to authentication attempts if someone
1390 * has actually implemented this.
1391 * TODO: Could implement shared key authentication. */
1392 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1393 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1394 "frame (alg=%d transaction=%d)\n",
1395 dev->name, auth_alg, auth_transaction);
1396 return;
1397 }
1398 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1399 }
1400
1401 if (auth_alg != ifsta->auth_alg ||
1402 auth_transaction != ifsta->auth_transaction) {
1403 printk(KERN_DEBUG "%s: unexpected authentication frame "
1404 "(alg=%d transaction=%d)\n",
1405 dev->name, auth_alg, auth_transaction);
1406 return;
1407 }
1408
1409 if (status_code != WLAN_STATUS_SUCCESS) {
1410 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1411 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1412 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1413 u8 algs[3];
1414 const int num_algs = ARRAY_SIZE(algs);
1415 int i, pos;
1416 algs[0] = algs[1] = algs[2] = 0xff;
1417 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1418 algs[0] = WLAN_AUTH_OPEN;
1419 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1420 algs[1] = WLAN_AUTH_SHARED_KEY;
1421 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1422 algs[2] = WLAN_AUTH_LEAP;
1423 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1424 pos = 0;
1425 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1426 pos = 1;
1427 else
1428 pos = 2;
1429 for (i = 0; i < num_algs; i++) {
1430 pos++;
1431 if (pos >= num_algs)
1432 pos = 0;
1433 if (algs[pos] == ifsta->auth_alg ||
1434 algs[pos] == 0xff)
1435 continue;
1436 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1437 !ieee80211_sta_wep_configured(dev))
1438 continue;
1439 ifsta->auth_alg = algs[pos];
1440 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1441 "next try\n",
1442 dev->name, ifsta->auth_alg);
1443 break;
1444 }
1445 }
1446 return;
1447 }
1448
1449 switch (ifsta->auth_alg) {
1450 case WLAN_AUTH_OPEN:
1451 case WLAN_AUTH_LEAP:
1452 ieee80211_auth_completed(dev, ifsta);
1453 break;
1454 case WLAN_AUTH_SHARED_KEY:
1455 if (ifsta->auth_transaction == 4)
1456 ieee80211_auth_completed(dev, ifsta);
1457 else
1458 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1459 break;
1460 }
1461 }
1462
1463
1464 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1465 struct ieee80211_if_sta *ifsta,
1466 struct ieee80211_mgmt *mgmt,
1467 size_t len)
1468 {
1469 u16 reason_code;
1470 DECLARE_MAC_BUF(mac);
1471
1472 if (len < 24 + 2) {
1473 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1474 "received from %s - ignored\n",
1475 dev->name, len, print_mac(mac, mgmt->sa));
1476 return;
1477 }
1478
1479 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1480 printk(KERN_DEBUG "%s: deauthentication frame received from "
1481 "unknown AP (SA=%s BSSID=%s) - "
1482 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1483 print_mac(mac, mgmt->bssid));
1484 return;
1485 }
1486
1487 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1488
1489 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1490 " (reason=%d)\n",
1491 dev->name, print_mac(mac, mgmt->sa), reason_code);
1492
1493 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1494 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1495 }
1496
1497 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1498 ifsta->state == IEEE80211_ASSOCIATE ||
1499 ifsta->state == IEEE80211_ASSOCIATED) {
1500 ifsta->state = IEEE80211_AUTHENTICATE;
1501 mod_timer(&ifsta->timer, jiffies +
1502 IEEE80211_RETRY_AUTH_INTERVAL);
1503 }
1504
1505 ieee80211_set_disassoc(dev, ifsta, 1);
1506 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1507 }
1508
1509
1510 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1511 struct ieee80211_if_sta *ifsta,
1512 struct ieee80211_mgmt *mgmt,
1513 size_t len)
1514 {
1515 u16 reason_code;
1516 DECLARE_MAC_BUF(mac);
1517
1518 if (len < 24 + 2) {
1519 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1520 "received from %s - ignored\n",
1521 dev->name, len, print_mac(mac, mgmt->sa));
1522 return;
1523 }
1524
1525 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1526 printk(KERN_DEBUG "%s: disassociation frame received from "
1527 "unknown AP (SA=%s BSSID=%s) - "
1528 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1529 print_mac(mac, mgmt->bssid));
1530 return;
1531 }
1532
1533 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1534
1535 printk(KERN_DEBUG "%s: RX disassociation from %s"
1536 " (reason=%d)\n",
1537 dev->name, print_mac(mac, mgmt->sa), reason_code);
1538
1539 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1540 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1541
1542 if (ifsta->state == IEEE80211_ASSOCIATED) {
1543 ifsta->state = IEEE80211_ASSOCIATE;
1544 mod_timer(&ifsta->timer, jiffies +
1545 IEEE80211_RETRY_AUTH_INTERVAL);
1546 }
1547
1548 ieee80211_set_disassoc(dev, ifsta, 0);
1549 }
1550
1551
1552 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1553 struct ieee80211_if_sta *ifsta,
1554 struct ieee80211_mgmt *mgmt,
1555 size_t len,
1556 int reassoc)
1557 {
1558 struct ieee80211_local *local = sdata->local;
1559 struct net_device *dev = sdata->dev;
1560 struct ieee80211_hw_mode *mode;
1561 struct sta_info *sta;
1562 u32 rates;
1563 u16 capab_info, status_code, aid;
1564 struct ieee802_11_elems elems;
1565 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1566 u8 *pos;
1567 int i, j;
1568 DECLARE_MAC_BUF(mac);
1569
1570 /* AssocResp and ReassocResp have identical structure, so process both
1571 * of them in this function. */
1572
1573 if (ifsta->state != IEEE80211_ASSOCIATE) {
1574 printk(KERN_DEBUG "%s: association frame received from "
1575 "%s, but not in associate state - ignored\n",
1576 dev->name, print_mac(mac, mgmt->sa));
1577 return;
1578 }
1579
1580 if (len < 24 + 6) {
1581 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1582 "received from %s - ignored\n",
1583 dev->name, len, print_mac(mac, mgmt->sa));
1584 return;
1585 }
1586
1587 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1588 printk(KERN_DEBUG "%s: association frame received from "
1589 "unknown AP (SA=%s BSSID=%s) - "
1590 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1591 print_mac(mac, mgmt->bssid));
1592 return;
1593 }
1594
1595 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1596 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1597 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1598
1599 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1600 "status=%d aid=%d)\n",
1601 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1602 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1603
1604 if (status_code != WLAN_STATUS_SUCCESS) {
1605 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1606 dev->name, status_code);
1607 /* if this was a reassociation, ensure we try a "full"
1608 * association next time. This works around some broken APs
1609 * which do not correctly reject reassociation requests. */
1610 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1611 return;
1612 }
1613
1614 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1615 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1616 "set\n", dev->name, aid);
1617 aid &= ~(BIT(15) | BIT(14));
1618
1619 pos = mgmt->u.assoc_resp.variable;
1620 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1621
1622 if (!elems.supp_rates) {
1623 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1624 dev->name);
1625 return;
1626 }
1627
1628 printk(KERN_DEBUG "%s: associated\n", dev->name);
1629 ifsta->aid = aid;
1630 ifsta->ap_capab = capab_info;
1631
1632 kfree(ifsta->assocresp_ies);
1633 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1634 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1635 if (ifsta->assocresp_ies)
1636 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1637
1638 /* set AID, ieee80211_set_associated() will tell the driver */
1639 bss_conf->aid = aid;
1640 ieee80211_set_associated(dev, ifsta, 1);
1641
1642 /* Add STA entry for the AP */
1643 sta = sta_info_get(local, ifsta->bssid);
1644 if (!sta) {
1645 struct ieee80211_sta_bss *bss;
1646 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1647 if (!sta) {
1648 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1649 " AP\n", dev->name);
1650 return;
1651 }
1652 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1653 local->hw.conf.channel,
1654 ifsta->ssid, ifsta->ssid_len);
1655 if (bss) {
1656 sta->last_rssi = bss->rssi;
1657 sta->last_signal = bss->signal;
1658 sta->last_noise = bss->noise;
1659 ieee80211_rx_bss_put(dev, bss);
1660 }
1661 }
1662
1663 sta->dev = dev;
1664 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1665
1666 rates = 0;
1667 mode = local->oper_hw_mode;
1668 for (i = 0; i < elems.supp_rates_len; i++) {
1669 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1670 for (j = 0; j < mode->num_rates; j++)
1671 if (mode->rates[j].rate == rate)
1672 rates |= BIT(j);
1673 }
1674 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1675 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1676 for (j = 0; j < mode->num_rates; j++)
1677 if (mode->rates[j].rate == rate)
1678 rates |= BIT(j);
1679 }
1680 sta->supp_rates = rates;
1681
1682 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1683 local->ops->conf_ht) {
1684 struct ieee80211_ht_bss_info bss_info;
1685
1686 ieee80211_ht_cap_ie_to_ht_info(
1687 (struct ieee80211_ht_cap *)
1688 elems.ht_cap_elem, &sta->ht_info);
1689 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1690 (struct ieee80211_ht_addt_info *)
1691 elems.ht_info_elem, &bss_info);
1692 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1693 }
1694
1695 rate_control_rate_init(sta, local);
1696
1697 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1698 sta->flags |= WLAN_STA_WME;
1699 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1700 elems.wmm_param_len);
1701 }
1702
1703
1704 sta_info_put(sta);
1705
1706 ieee80211_associated(dev, ifsta);
1707 }
1708
1709
1710 /* Caller must hold local->sta_bss_lock */
1711 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1712 struct ieee80211_sta_bss *bss)
1713 {
1714 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1715 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1716 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1717 }
1718
1719
1720 /* Caller must hold local->sta_bss_lock */
1721 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1722 struct ieee80211_sta_bss *bss)
1723 {
1724 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1725 struct ieee80211_sta_bss *b, *prev = NULL;
1726 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1727 while (b) {
1728 if (b == bss) {
1729 if (!prev)
1730 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1731 bss->hnext;
1732 else
1733 prev->hnext = bss->hnext;
1734 break;
1735 }
1736 prev = b;
1737 b = b->hnext;
1738 }
1739 }
1740
1741
1742 static struct ieee80211_sta_bss *
1743 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1744 u8 *ssid, u8 ssid_len)
1745 {
1746 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1747 struct ieee80211_sta_bss *bss;
1748
1749 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1750 if (!bss)
1751 return NULL;
1752 atomic_inc(&bss->users);
1753 atomic_inc(&bss->users);
1754 memcpy(bss->bssid, bssid, ETH_ALEN);
1755 bss->channel = channel;
1756 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1757 memcpy(bss->ssid, ssid, ssid_len);
1758 bss->ssid_len = ssid_len;
1759 }
1760
1761 spin_lock_bh(&local->sta_bss_lock);
1762 /* TODO: order by RSSI? */
1763 list_add_tail(&bss->list, &local->sta_bss_list);
1764 __ieee80211_rx_bss_hash_add(dev, bss);
1765 spin_unlock_bh(&local->sta_bss_lock);
1766 return bss;
1767 }
1768
1769
1770 static struct ieee80211_sta_bss *
1771 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1772 u8 *ssid, u8 ssid_len)
1773 {
1774 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1775 struct ieee80211_sta_bss *bss;
1776
1777 spin_lock_bh(&local->sta_bss_lock);
1778 bss = local->sta_bss_hash[STA_HASH(bssid)];
1779 while (bss) {
1780 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1781 bss->channel == channel &&
1782 bss->ssid_len == ssid_len &&
1783 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1784 atomic_inc(&bss->users);
1785 break;
1786 }
1787 bss = bss->hnext;
1788 }
1789 spin_unlock_bh(&local->sta_bss_lock);
1790 return bss;
1791 }
1792
1793
1794 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1795 {
1796 kfree(bss->wpa_ie);
1797 kfree(bss->rsn_ie);
1798 kfree(bss->wmm_ie);
1799 kfree(bss->ht_ie);
1800 kfree(bss);
1801 }
1802
1803
1804 static void ieee80211_rx_bss_put(struct net_device *dev,
1805 struct ieee80211_sta_bss *bss)
1806 {
1807 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1808 if (!atomic_dec_and_test(&bss->users))
1809 return;
1810
1811 spin_lock_bh(&local->sta_bss_lock);
1812 __ieee80211_rx_bss_hash_del(dev, bss);
1813 list_del(&bss->list);
1814 spin_unlock_bh(&local->sta_bss_lock);
1815 ieee80211_rx_bss_free(bss);
1816 }
1817
1818
1819 void ieee80211_rx_bss_list_init(struct net_device *dev)
1820 {
1821 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1822 spin_lock_init(&local->sta_bss_lock);
1823 INIT_LIST_HEAD(&local->sta_bss_list);
1824 }
1825
1826
1827 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1828 {
1829 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1830 struct ieee80211_sta_bss *bss, *tmp;
1831
1832 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1833 ieee80211_rx_bss_put(dev, bss);
1834 }
1835
1836
1837 static void ieee80211_rx_bss_info(struct net_device *dev,
1838 struct ieee80211_mgmt *mgmt,
1839 size_t len,
1840 struct ieee80211_rx_status *rx_status,
1841 int beacon)
1842 {
1843 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1844 struct ieee802_11_elems elems;
1845 size_t baselen;
1846 int channel, clen;
1847 struct ieee80211_sta_bss *bss;
1848 struct sta_info *sta;
1849 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1850 u64 timestamp;
1851 DECLARE_MAC_BUF(mac);
1852 DECLARE_MAC_BUF(mac2);
1853
1854 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1855 return; /* ignore ProbeResp to foreign address */
1856
1857 #if 0
1858 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
1859 dev->name, beacon ? "Beacon" : "Probe Response",
1860 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
1861 #endif
1862
1863 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1864 if (baselen > len)
1865 return;
1866
1867 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1868
1869 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
1870 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1871 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1872 static unsigned long last_tsf_debug = 0;
1873 u64 tsf;
1874 if (local->ops->get_tsf)
1875 tsf = local->ops->get_tsf(local_to_hw(local));
1876 else
1877 tsf = -1LLU;
1878 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1879 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1880 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
1881 "@%lu\n",
1882 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
1883 (unsigned long long)tsf,
1884 (unsigned long long)timestamp,
1885 (unsigned long long)(tsf - timestamp),
1886 jiffies);
1887 last_tsf_debug = jiffies;
1888 }
1889 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1890 }
1891
1892 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1893
1894 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1895 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1896 (sta = sta_info_get(local, mgmt->sa))) {
1897 struct ieee80211_hw_mode *mode;
1898 struct ieee80211_rate *rates;
1899 size_t num_rates;
1900 u32 supp_rates, prev_rates;
1901 int i, j;
1902
1903 mode = local->sta_sw_scanning ?
1904 local->scan_hw_mode : local->oper_hw_mode;
1905
1906 if (local->sta_hw_scanning) {
1907 /* search for the correct mode matches the beacon */
1908 list_for_each_entry(mode, &local->modes_list, list)
1909 if (mode->mode == rx_status->phymode)
1910 break;
1911
1912 if (mode == NULL)
1913 mode = local->oper_hw_mode;
1914 }
1915 rates = mode->rates;
1916 num_rates = mode->num_rates;
1917
1918 supp_rates = 0;
1919 for (i = 0; i < elems.supp_rates_len +
1920 elems.ext_supp_rates_len; i++) {
1921 u8 rate = 0;
1922 int own_rate;
1923 if (i < elems.supp_rates_len)
1924 rate = elems.supp_rates[i];
1925 else if (elems.ext_supp_rates)
1926 rate = elems.ext_supp_rates
1927 [i - elems.supp_rates_len];
1928 own_rate = 5 * (rate & 0x7f);
1929 for (j = 0; j < num_rates; j++)
1930 if (rates[j].rate == own_rate)
1931 supp_rates |= BIT(j);
1932 }
1933
1934 prev_rates = sta->supp_rates;
1935 sta->supp_rates &= supp_rates;
1936 if (sta->supp_rates == 0) {
1937 /* No matching rates - this should not really happen.
1938 * Make sure that at least one rate is marked
1939 * supported to avoid issues with TX rate ctrl. */
1940 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1941 }
1942 if (sta->supp_rates != prev_rates) {
1943 printk(KERN_DEBUG "%s: updated supp_rates set for "
1944 "%s based on beacon info (0x%x & 0x%x -> "
1945 "0x%x)\n",
1946 dev->name, print_mac(mac, sta->addr), prev_rates,
1947 supp_rates, sta->supp_rates);
1948 }
1949 sta_info_put(sta);
1950 }
1951
1952 if (!elems.ssid)
1953 return;
1954
1955 if (elems.ds_params && elems.ds_params_len == 1)
1956 channel = elems.ds_params[0];
1957 else
1958 channel = rx_status->channel;
1959
1960 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1961 elems.ssid, elems.ssid_len);
1962 if (!bss) {
1963 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1964 elems.ssid, elems.ssid_len);
1965 if (!bss)
1966 return;
1967 } else {
1968 #if 0
1969 /* TODO: order by RSSI? */
1970 spin_lock_bh(&local->sta_bss_lock);
1971 list_move_tail(&bss->list, &local->sta_bss_list);
1972 spin_unlock_bh(&local->sta_bss_lock);
1973 #endif
1974 }
1975
1976 if (bss->probe_resp && beacon) {
1977 /* Do not allow beacon to override data from Probe Response. */
1978 ieee80211_rx_bss_put(dev, bss);
1979 return;
1980 }
1981
1982 /* save the ERP value so that it is available at association time */
1983 if (elems.erp_info && elems.erp_info_len >= 1) {
1984 bss->erp_value = elems.erp_info[0];
1985 bss->has_erp_value = 1;
1986 }
1987
1988 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1989 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1990
1991 bss->supp_rates_len = 0;
1992 if (elems.supp_rates) {
1993 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1994 if (clen > elems.supp_rates_len)
1995 clen = elems.supp_rates_len;
1996 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1997 clen);
1998 bss->supp_rates_len += clen;
1999 }
2000 if (elems.ext_supp_rates) {
2001 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2002 if (clen > elems.ext_supp_rates_len)
2003 clen = elems.ext_supp_rates_len;
2004 memcpy(&bss->supp_rates[bss->supp_rates_len],
2005 elems.ext_supp_rates, clen);
2006 bss->supp_rates_len += clen;
2007 }
2008
2009 if (elems.wpa &&
2010 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2011 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2012 kfree(bss->wpa_ie);
2013 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2014 if (bss->wpa_ie) {
2015 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2016 bss->wpa_ie_len = elems.wpa_len + 2;
2017 } else
2018 bss->wpa_ie_len = 0;
2019 } else if (!elems.wpa && bss->wpa_ie) {
2020 kfree(bss->wpa_ie);
2021 bss->wpa_ie = NULL;
2022 bss->wpa_ie_len = 0;
2023 }
2024
2025 if (elems.rsn &&
2026 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2027 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2028 kfree(bss->rsn_ie);
2029 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2030 if (bss->rsn_ie) {
2031 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2032 bss->rsn_ie_len = elems.rsn_len + 2;
2033 } else
2034 bss->rsn_ie_len = 0;
2035 } else if (!elems.rsn && bss->rsn_ie) {
2036 kfree(bss->rsn_ie);
2037 bss->rsn_ie = NULL;
2038 bss->rsn_ie_len = 0;
2039 }
2040
2041 if (elems.wmm_param &&
2042 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2043 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2044 kfree(bss->wmm_ie);
2045 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2046 if (bss->wmm_ie) {
2047 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2048 elems.wmm_param_len + 2);
2049 bss->wmm_ie_len = elems.wmm_param_len + 2;
2050 } else
2051 bss->wmm_ie_len = 0;
2052 } else if (!elems.wmm_param && bss->wmm_ie) {
2053 kfree(bss->wmm_ie);
2054 bss->wmm_ie = NULL;
2055 bss->wmm_ie_len = 0;
2056 }
2057 if (elems.ht_cap_elem &&
2058 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2059 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2060 kfree(bss->ht_ie);
2061 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2062 if (bss->ht_ie) {
2063 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2064 elems.ht_cap_elem_len + 2);
2065 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2066 } else
2067 bss->ht_ie_len = 0;
2068 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2069 kfree(bss->ht_ie);
2070 bss->ht_ie = NULL;
2071 bss->ht_ie_len = 0;
2072 }
2073
2074 bss->hw_mode = rx_status->phymode;
2075 bss->freq = rx_status->freq;
2076 if (channel != rx_status->channel &&
2077 (bss->hw_mode == MODE_IEEE80211G ||
2078 bss->hw_mode == MODE_IEEE80211B) &&
2079 channel >= 1 && channel <= 14) {
2080 static const int freq_list[] = {
2081 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2082 2447, 2452, 2457, 2462, 2467, 2472, 2484
2083 };
2084 /* IEEE 802.11g/b mode can receive packets from neighboring
2085 * channels, so map the channel into frequency. */
2086 bss->freq = freq_list[channel - 1];
2087 }
2088 bss->timestamp = timestamp;
2089 bss->last_update = jiffies;
2090 bss->rssi = rx_status->ssi;
2091 bss->signal = rx_status->signal;
2092 bss->noise = rx_status->noise;
2093 if (!beacon)
2094 bss->probe_resp++;
2095 ieee80211_rx_bss_put(dev, bss);
2096 }
2097
2098
2099 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2100 struct ieee80211_mgmt *mgmt,
2101 size_t len,
2102 struct ieee80211_rx_status *rx_status)
2103 {
2104 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2105 }
2106
2107
2108 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2109 struct ieee80211_mgmt *mgmt,
2110 size_t len,
2111 struct ieee80211_rx_status *rx_status)
2112 {
2113 struct ieee80211_sub_if_data *sdata;
2114 struct ieee80211_if_sta *ifsta;
2115 size_t baselen;
2116 struct ieee802_11_elems elems;
2117 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2118 struct ieee80211_conf *conf = &local->hw.conf;
2119 u32 changed = 0;
2120
2121 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2122
2123 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2124 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2125 return;
2126 ifsta = &sdata->u.sta;
2127
2128 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2129 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2130 return;
2131
2132 /* Process beacon from the current BSS */
2133 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2134 if (baselen > len)
2135 return;
2136
2137 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2138
2139 if (elems.erp_info && elems.erp_info_len >= 1)
2140 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2141 else {
2142 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2143 changed |= ieee80211_handle_protect_preamb(sdata, false,
2144 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2145 }
2146
2147 if (elems.ht_cap_elem && elems.ht_info_elem &&
2148 elems.wmm_param && local->ops->conf_ht &&
2149 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2150 struct ieee80211_ht_bss_info bss_info;
2151
2152 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2153 (struct ieee80211_ht_addt_info *)
2154 elems.ht_info_elem, &bss_info);
2155 /* check if AP changed bss inforamation */
2156 if ((conf->ht_bss_conf.primary_channel !=
2157 bss_info.primary_channel) ||
2158 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2159 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2160 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2161 &bss_info);
2162 }
2163
2164 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2165 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2166 elems.wmm_param_len);
2167 }
2168
2169 ieee80211_bss_info_change_notify(sdata, changed);
2170 }
2171
2172
2173 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2174 struct ieee80211_if_sta *ifsta,
2175 struct ieee80211_mgmt *mgmt,
2176 size_t len,
2177 struct ieee80211_rx_status *rx_status)
2178 {
2179 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2180 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2181 int tx_last_beacon;
2182 struct sk_buff *skb;
2183 struct ieee80211_mgmt *resp;
2184 u8 *pos, *end;
2185 DECLARE_MAC_BUF(mac);
2186 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2187 DECLARE_MAC_BUF(mac2);
2188 DECLARE_MAC_BUF(mac3);
2189 #endif
2190
2191 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2192 ifsta->state != IEEE80211_IBSS_JOINED ||
2193 len < 24 + 2 || !ifsta->probe_resp)
2194 return;
2195
2196 if (local->ops->tx_last_beacon)
2197 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2198 else
2199 tx_last_beacon = 1;
2200
2201 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2202 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2203 "%s (tx_last_beacon=%d)\n",
2204 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2205 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2206 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2207
2208 if (!tx_last_beacon)
2209 return;
2210
2211 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2212 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2213 return;
2214
2215 end = ((u8 *) mgmt) + len;
2216 pos = mgmt->u.probe_req.variable;
2217 if (pos[0] != WLAN_EID_SSID ||
2218 pos + 2 + pos[1] > end) {
2219 if (net_ratelimit()) {
2220 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2221 "from %s\n",
2222 dev->name, print_mac(mac, mgmt->sa));
2223 }
2224 return;
2225 }
2226 if (pos[1] != 0 &&
2227 (pos[1] != ifsta->ssid_len ||
2228 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2229 /* Ignore ProbeReq for foreign SSID */
2230 return;
2231 }
2232
2233 /* Reply with ProbeResp */
2234 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2235 if (!skb)
2236 return;
2237
2238 resp = (struct ieee80211_mgmt *) skb->data;
2239 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2240 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2241 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2242 dev->name, print_mac(mac, resp->da));
2243 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2244 ieee80211_sta_tx(dev, skb, 0);
2245 }
2246
2247 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2248 struct ieee80211_if_sta *ifsta,
2249 struct ieee80211_mgmt *mgmt,
2250 size_t len)
2251 {
2252 if (len < IEEE80211_MIN_ACTION_SIZE)
2253 return;
2254
2255 switch (mgmt->u.action.category) {
2256 case WLAN_CATEGORY_BACK:
2257 switch (mgmt->u.action.u.addba_req.action_code) {
2258 case WLAN_ACTION_ADDBA_REQ:
2259 if (len < (IEEE80211_MIN_ACTION_SIZE +
2260 sizeof(mgmt->u.action.u.addba_req)))
2261 break;
2262 ieee80211_sta_process_addba_request(dev, mgmt, len);
2263 break;
2264 case WLAN_ACTION_DELBA:
2265 if (len < (IEEE80211_MIN_ACTION_SIZE +
2266 sizeof(mgmt->u.action.u.delba)))
2267 break;
2268 ieee80211_sta_process_delba(dev, mgmt, len);
2269 break;
2270 default:
2271 if (net_ratelimit())
2272 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2273 dev->name);
2274 break;
2275 }
2276 break;
2277 default:
2278 break;
2279 }
2280 }
2281
2282 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2283 struct ieee80211_rx_status *rx_status)
2284 {
2285 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2286 struct ieee80211_sub_if_data *sdata;
2287 struct ieee80211_if_sta *ifsta;
2288 struct ieee80211_mgmt *mgmt;
2289 u16 fc;
2290
2291 if (skb->len < 24)
2292 goto fail;
2293
2294 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2295 ifsta = &sdata->u.sta;
2296
2297 mgmt = (struct ieee80211_mgmt *) skb->data;
2298 fc = le16_to_cpu(mgmt->frame_control);
2299
2300 switch (fc & IEEE80211_FCTL_STYPE) {
2301 case IEEE80211_STYPE_PROBE_REQ:
2302 case IEEE80211_STYPE_PROBE_RESP:
2303 case IEEE80211_STYPE_BEACON:
2304 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2305 case IEEE80211_STYPE_AUTH:
2306 case IEEE80211_STYPE_ASSOC_RESP:
2307 case IEEE80211_STYPE_REASSOC_RESP:
2308 case IEEE80211_STYPE_DEAUTH:
2309 case IEEE80211_STYPE_DISASSOC:
2310 case IEEE80211_STYPE_ACTION:
2311 skb_queue_tail(&ifsta->skb_queue, skb);
2312 queue_work(local->hw.workqueue, &ifsta->work);
2313 return;
2314 default:
2315 printk(KERN_DEBUG "%s: received unknown management frame - "
2316 "stype=%d\n", dev->name,
2317 (fc & IEEE80211_FCTL_STYPE) >> 4);
2318 break;
2319 }
2320
2321 fail:
2322 kfree_skb(skb);
2323 }
2324
2325
2326 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2327 struct sk_buff *skb)
2328 {
2329 struct ieee80211_rx_status *rx_status;
2330 struct ieee80211_sub_if_data *sdata;
2331 struct ieee80211_if_sta *ifsta;
2332 struct ieee80211_mgmt *mgmt;
2333 u16 fc;
2334
2335 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2336 ifsta = &sdata->u.sta;
2337
2338 rx_status = (struct ieee80211_rx_status *) skb->cb;
2339 mgmt = (struct ieee80211_mgmt *) skb->data;
2340 fc = le16_to_cpu(mgmt->frame_control);
2341
2342 switch (fc & IEEE80211_FCTL_STYPE) {
2343 case IEEE80211_STYPE_PROBE_REQ:
2344 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2345 rx_status);
2346 break;
2347 case IEEE80211_STYPE_PROBE_RESP:
2348 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2349 break;
2350 case IEEE80211_STYPE_BEACON:
2351 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2352 break;
2353 case IEEE80211_STYPE_AUTH:
2354 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2355 break;
2356 case IEEE80211_STYPE_ASSOC_RESP:
2357 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2358 break;
2359 case IEEE80211_STYPE_REASSOC_RESP:
2360 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2361 break;
2362 case IEEE80211_STYPE_DEAUTH:
2363 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2364 break;
2365 case IEEE80211_STYPE_DISASSOC:
2366 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2367 break;
2368 case IEEE80211_STYPE_ACTION:
2369 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2370 break;
2371 }
2372
2373 kfree_skb(skb);
2374 }
2375
2376
2377 ieee80211_txrx_result
2378 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2379 struct ieee80211_rx_status *rx_status)
2380 {
2381 struct ieee80211_mgmt *mgmt;
2382 u16 fc;
2383
2384 if (skb->len < 2)
2385 return TXRX_DROP;
2386
2387 mgmt = (struct ieee80211_mgmt *) skb->data;
2388 fc = le16_to_cpu(mgmt->frame_control);
2389
2390 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2391 return TXRX_CONTINUE;
2392
2393 if (skb->len < 24)
2394 return TXRX_DROP;
2395
2396 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2397 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2398 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2399 skb->len, rx_status);
2400 dev_kfree_skb(skb);
2401 return TXRX_QUEUED;
2402 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2403 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2404 rx_status);
2405 dev_kfree_skb(skb);
2406 return TXRX_QUEUED;
2407 }
2408 }
2409 return TXRX_CONTINUE;
2410 }
2411
2412
2413 static int ieee80211_sta_active_ibss(struct net_device *dev)
2414 {
2415 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2416 int active = 0;
2417 struct sta_info *sta;
2418
2419 read_lock_bh(&local->sta_lock);
2420 list_for_each_entry(sta, &local->sta_list, list) {
2421 if (sta->dev == dev &&
2422 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2423 jiffies)) {
2424 active++;
2425 break;
2426 }
2427 }
2428 read_unlock_bh(&local->sta_lock);
2429
2430 return active;
2431 }
2432
2433
2434 static void ieee80211_sta_expire(struct net_device *dev)
2435 {
2436 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2437 struct sta_info *sta, *tmp;
2438 LIST_HEAD(tmp_list);
2439 DECLARE_MAC_BUF(mac);
2440
2441 write_lock_bh(&local->sta_lock);
2442 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2443 if (time_after(jiffies, sta->last_rx +
2444 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2445 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2446 dev->name, print_mac(mac, sta->addr));
2447 __sta_info_get(sta);
2448 sta_info_remove(sta);
2449 list_add(&sta->list, &tmp_list);
2450 }
2451 write_unlock_bh(&local->sta_lock);
2452
2453 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2454 sta_info_free(sta);
2455 sta_info_put(sta);
2456 }
2457 }
2458
2459
2460 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2461 struct ieee80211_if_sta *ifsta)
2462 {
2463 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2464
2465 ieee80211_sta_expire(dev);
2466 if (ieee80211_sta_active_ibss(dev))
2467 return;
2468
2469 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2470 "IBSS networks with same SSID (merge)\n", dev->name);
2471 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2472 }
2473
2474
2475 void ieee80211_sta_timer(unsigned long data)
2476 {
2477 struct ieee80211_sub_if_data *sdata =
2478 (struct ieee80211_sub_if_data *) data;
2479 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2480 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2481
2482 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2483 queue_work(local->hw.workqueue, &ifsta->work);
2484 }
2485
2486
2487 void ieee80211_sta_work(struct work_struct *work)
2488 {
2489 struct ieee80211_sub_if_data *sdata =
2490 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2491 struct net_device *dev = sdata->dev;
2492 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2493 struct ieee80211_if_sta *ifsta;
2494 struct sk_buff *skb;
2495
2496 if (!netif_running(dev))
2497 return;
2498
2499 if (local->sta_sw_scanning || local->sta_hw_scanning)
2500 return;
2501
2502 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2503 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2504 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2505 "(type=%d)\n", dev->name, sdata->vif.type);
2506 return;
2507 }
2508 ifsta = &sdata->u.sta;
2509
2510 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2511 ieee80211_sta_rx_queued_mgmt(dev, skb);
2512
2513 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2514 ifsta->state != IEEE80211_ASSOCIATE &&
2515 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2516 if (ifsta->scan_ssid_len)
2517 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2518 else
2519 ieee80211_sta_start_scan(dev, NULL, 0);
2520 return;
2521 }
2522
2523 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2524 if (ieee80211_sta_config_auth(dev, ifsta))
2525 return;
2526 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2527 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2528 return;
2529
2530 switch (ifsta->state) {
2531 case IEEE80211_DISABLED:
2532 break;
2533 case IEEE80211_AUTHENTICATE:
2534 ieee80211_authenticate(dev, ifsta);
2535 break;
2536 case IEEE80211_ASSOCIATE:
2537 ieee80211_associate(dev, ifsta);
2538 break;
2539 case IEEE80211_ASSOCIATED:
2540 ieee80211_associated(dev, ifsta);
2541 break;
2542 case IEEE80211_IBSS_SEARCH:
2543 ieee80211_sta_find_ibss(dev, ifsta);
2544 break;
2545 case IEEE80211_IBSS_JOINED:
2546 ieee80211_sta_merge_ibss(dev, ifsta);
2547 break;
2548 default:
2549 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2550 ifsta->state);
2551 break;
2552 }
2553
2554 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2555 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2556 "mixed-cell disabled - disassociate\n", dev->name);
2557
2558 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2559 ieee80211_set_disassoc(dev, ifsta, 0);
2560 }
2561 }
2562
2563
2564 static void ieee80211_sta_reset_auth(struct net_device *dev,
2565 struct ieee80211_if_sta *ifsta)
2566 {
2567 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2568
2569 if (local->ops->reset_tsf) {
2570 /* Reset own TSF to allow time synchronization work. */
2571 local->ops->reset_tsf(local_to_hw(local));
2572 }
2573
2574 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2575
2576
2577 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2578 ifsta->auth_alg = WLAN_AUTH_OPEN;
2579 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2580 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2581 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2582 ifsta->auth_alg = WLAN_AUTH_LEAP;
2583 else
2584 ifsta->auth_alg = WLAN_AUTH_OPEN;
2585 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2586 ifsta->auth_alg);
2587 ifsta->auth_transaction = -1;
2588 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2589 ifsta->auth_tries = ifsta->assoc_tries = 0;
2590 netif_carrier_off(dev);
2591 }
2592
2593
2594 void ieee80211_sta_req_auth(struct net_device *dev,
2595 struct ieee80211_if_sta *ifsta)
2596 {
2597 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2598 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2599
2600 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2601 return;
2602
2603 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2604 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2605 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2606 IEEE80211_STA_AUTO_SSID_SEL))) {
2607 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2608 queue_work(local->hw.workqueue, &ifsta->work);
2609 }
2610 }
2611
2612 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2613 const char *ssid, int ssid_len)
2614 {
2615 int tmp, hidden_ssid;
2616
2617 if (ssid_len == ifsta->ssid_len &&
2618 !memcmp(ifsta->ssid, ssid, ssid_len))
2619 return 1;
2620
2621 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2622 return 0;
2623
2624 hidden_ssid = 1;
2625 tmp = ssid_len;
2626 while (tmp--) {
2627 if (ssid[tmp] != '\0') {
2628 hidden_ssid = 0;
2629 break;
2630 }
2631 }
2632
2633 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2634 return 1;
2635
2636 if (ssid_len == 1 && ssid[0] == ' ')
2637 return 1;
2638
2639 return 0;
2640 }
2641
2642 static int ieee80211_sta_config_auth(struct net_device *dev,
2643 struct ieee80211_if_sta *ifsta)
2644 {
2645 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2646 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2647 struct ieee80211_sta_bss *bss, *selected = NULL;
2648 int top_rssi = 0, freq;
2649
2650 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2651 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2652 ifsta->state = IEEE80211_AUTHENTICATE;
2653 ieee80211_sta_reset_auth(dev, ifsta);
2654 return 0;
2655 }
2656
2657 spin_lock_bh(&local->sta_bss_lock);
2658 freq = local->oper_channel->freq;
2659 list_for_each_entry(bss, &local->sta_bss_list, list) {
2660 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2661 continue;
2662
2663 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2664 !!sdata->default_key)
2665 continue;
2666
2667 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2668 bss->freq != freq)
2669 continue;
2670
2671 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2672 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2673 continue;
2674
2675 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2676 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2677 continue;
2678
2679 if (!selected || top_rssi < bss->rssi) {
2680 selected = bss;
2681 top_rssi = bss->rssi;
2682 }
2683 }
2684 if (selected)
2685 atomic_inc(&selected->users);
2686 spin_unlock_bh(&local->sta_bss_lock);
2687
2688 if (selected) {
2689 ieee80211_set_channel(local, -1, selected->freq);
2690 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2691 ieee80211_sta_set_ssid(dev, selected->ssid,
2692 selected->ssid_len);
2693 ieee80211_sta_set_bssid(dev, selected->bssid);
2694 ieee80211_rx_bss_put(dev, selected);
2695 ifsta->state = IEEE80211_AUTHENTICATE;
2696 ieee80211_sta_reset_auth(dev, ifsta);
2697 return 0;
2698 } else {
2699 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2700 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2701 ieee80211_sta_start_scan(dev, NULL, 0);
2702 else
2703 ieee80211_sta_start_scan(dev, ifsta->ssid,
2704 ifsta->ssid_len);
2705 ifsta->state = IEEE80211_AUTHENTICATE;
2706 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2707 } else
2708 ifsta->state = IEEE80211_DISABLED;
2709 }
2710 return -1;
2711 }
2712
2713 static int ieee80211_sta_join_ibss(struct net_device *dev,
2714 struct ieee80211_if_sta *ifsta,
2715 struct ieee80211_sta_bss *bss)
2716 {
2717 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2718 int res, rates, i, j;
2719 struct sk_buff *skb;
2720 struct ieee80211_mgmt *mgmt;
2721 struct ieee80211_tx_control control;
2722 struct ieee80211_hw_mode *mode;
2723 struct rate_selection ratesel;
2724 u8 *pos;
2725 struct ieee80211_sub_if_data *sdata;
2726 union iwreq_data wrqu;
2727
2728 /* Remove possible STA entries from other IBSS networks. */
2729 sta_info_flush(local, NULL);
2730
2731 if (local->ops->reset_tsf) {
2732 /* Reset own TSF to allow time synchronization work. */
2733 local->ops->reset_tsf(local_to_hw(local));
2734 }
2735 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2736 res = ieee80211_if_config(dev);
2737 if (res)
2738 return res;
2739
2740 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2741
2742 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2743 sdata->drop_unencrypted = bss->capability &
2744 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2745
2746 res = ieee80211_set_channel(local, -1, bss->freq);
2747
2748 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2749 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2750 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2751 local->hw.conf.freq);
2752 return -1;
2753 }
2754
2755 /* Set beacon template based on scan results */
2756 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2757 do {
2758 if (!skb)
2759 break;
2760
2761 skb_reserve(skb, local->hw.extra_tx_headroom);
2762
2763 mgmt = (struct ieee80211_mgmt *)
2764 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2765 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2766 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2767 IEEE80211_STYPE_BEACON);
2768 memset(mgmt->da, 0xff, ETH_ALEN);
2769 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2770 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2771 mgmt->u.beacon.beacon_int =
2772 cpu_to_le16(local->hw.conf.beacon_int);
2773 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2774
2775 pos = skb_put(skb, 2 + ifsta->ssid_len);
2776 *pos++ = WLAN_EID_SSID;
2777 *pos++ = ifsta->ssid_len;
2778 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2779
2780 rates = bss->supp_rates_len;
2781 if (rates > 8)
2782 rates = 8;
2783 pos = skb_put(skb, 2 + rates);
2784 *pos++ = WLAN_EID_SUPP_RATES;
2785 *pos++ = rates;
2786 memcpy(pos, bss->supp_rates, rates);
2787
2788 pos = skb_put(skb, 2 + 1);
2789 *pos++ = WLAN_EID_DS_PARAMS;
2790 *pos++ = 1;
2791 *pos++ = bss->channel;
2792
2793 pos = skb_put(skb, 2 + 2);
2794 *pos++ = WLAN_EID_IBSS_PARAMS;
2795 *pos++ = 2;
2796 /* FIX: set ATIM window based on scan results */
2797 *pos++ = 0;
2798 *pos++ = 0;
2799
2800 if (bss->supp_rates_len > 8) {
2801 rates = bss->supp_rates_len - 8;
2802 pos = skb_put(skb, 2 + rates);
2803 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2804 *pos++ = rates;
2805 memcpy(pos, &bss->supp_rates[8], rates);
2806 }
2807
2808 memset(&control, 0, sizeof(control));
2809 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2810 if (!ratesel.rate) {
2811 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2812 "for IBSS beacon\n", dev->name);
2813 break;
2814 }
2815 control.vif = &sdata->vif;
2816 control.tx_rate =
2817 (sdata->bss_conf.use_short_preamble &&
2818 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2819 ratesel.rate->val2 : ratesel.rate->val;
2820 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2821 control.power_level = local->hw.conf.power_level;
2822 control.flags |= IEEE80211_TXCTL_NO_ACK;
2823 control.retry_limit = 1;
2824
2825 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2826 if (ifsta->probe_resp) {
2827 mgmt = (struct ieee80211_mgmt *)
2828 ifsta->probe_resp->data;
2829 mgmt->frame_control =
2830 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2831 IEEE80211_STYPE_PROBE_RESP);
2832 } else {
2833 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2834 "template for IBSS\n", dev->name);
2835 }
2836
2837 if (local->ops->beacon_update &&
2838 local->ops->beacon_update(local_to_hw(local),
2839 skb, &control) == 0) {
2840 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2841 "template based on scan results\n", dev->name);
2842 skb = NULL;
2843 }
2844
2845 rates = 0;
2846 mode = local->oper_hw_mode;
2847 for (i = 0; i < bss->supp_rates_len; i++) {
2848 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2849 for (j = 0; j < mode->num_rates; j++)
2850 if (mode->rates[j].rate == bitrate)
2851 rates |= BIT(j);
2852 }
2853 ifsta->supp_rates_bits = rates;
2854 } while (0);
2855
2856 if (skb) {
2857 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2858 "template\n", dev->name);
2859 dev_kfree_skb(skb);
2860 }
2861
2862 ifsta->state = IEEE80211_IBSS_JOINED;
2863 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2864
2865 ieee80211_rx_bss_put(dev, bss);
2866
2867 memset(&wrqu, 0, sizeof(wrqu));
2868 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2869 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2870
2871 return res;
2872 }
2873
2874
2875 static int ieee80211_sta_create_ibss(struct net_device *dev,
2876 struct ieee80211_if_sta *ifsta)
2877 {
2878 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2879 struct ieee80211_sta_bss *bss;
2880 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2881 struct ieee80211_hw_mode *mode;
2882 u8 bssid[ETH_ALEN], *pos;
2883 int i;
2884 DECLARE_MAC_BUF(mac);
2885
2886 #if 0
2887 /* Easier testing, use fixed BSSID. */
2888 memset(bssid, 0xfe, ETH_ALEN);
2889 #else
2890 /* Generate random, not broadcast, locally administered BSSID. Mix in
2891 * own MAC address to make sure that devices that do not have proper
2892 * random number generator get different BSSID. */
2893 get_random_bytes(bssid, ETH_ALEN);
2894 for (i = 0; i < ETH_ALEN; i++)
2895 bssid[i] ^= dev->dev_addr[i];
2896 bssid[0] &= ~0x01;
2897 bssid[0] |= 0x02;
2898 #endif
2899
2900 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2901 dev->name, print_mac(mac, bssid));
2902
2903 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2904 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2905 if (!bss)
2906 return -ENOMEM;
2907
2908 mode = local->oper_hw_mode;
2909
2910 if (local->hw.conf.beacon_int == 0)
2911 local->hw.conf.beacon_int = 100;
2912 bss->beacon_int = local->hw.conf.beacon_int;
2913 bss->hw_mode = local->hw.conf.phymode;
2914 bss->freq = local->hw.conf.freq;
2915 bss->last_update = jiffies;
2916 bss->capability = WLAN_CAPABILITY_IBSS;
2917 if (sdata->default_key) {
2918 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2919 } else
2920 sdata->drop_unencrypted = 0;
2921 bss->supp_rates_len = mode->num_rates;
2922 pos = bss->supp_rates;
2923 for (i = 0; i < mode->num_rates; i++) {
2924 int rate = mode->rates[i].rate;
2925 *pos++ = (u8) (rate / 5);
2926 }
2927
2928 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2929 }
2930
2931
2932 static int ieee80211_sta_find_ibss(struct net_device *dev,
2933 struct ieee80211_if_sta *ifsta)
2934 {
2935 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2936 struct ieee80211_sta_bss *bss;
2937 int found = 0;
2938 u8 bssid[ETH_ALEN];
2939 int active_ibss;
2940 DECLARE_MAC_BUF(mac);
2941 DECLARE_MAC_BUF(mac2);
2942
2943 if (ifsta->ssid_len == 0)
2944 return -EINVAL;
2945
2946 active_ibss = ieee80211_sta_active_ibss(dev);
2947 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2948 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2949 dev->name, active_ibss);
2950 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2951 spin_lock_bh(&local->sta_bss_lock);
2952 list_for_each_entry(bss, &local->sta_bss_list, list) {
2953 if (ifsta->ssid_len != bss->ssid_len ||
2954 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2955 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2956 continue;
2957 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2958 printk(KERN_DEBUG " bssid=%s found\n",
2959 print_mac(mac, bss->bssid));
2960 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2961 memcpy(bssid, bss->bssid, ETH_ALEN);
2962 found = 1;
2963 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2964 break;
2965 }
2966 spin_unlock_bh(&local->sta_bss_lock);
2967
2968 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2969 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2970 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
2971 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2972 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2973 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2974 ifsta->ssid, ifsta->ssid_len))) {
2975 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2976 " based on configured SSID\n",
2977 dev->name, print_mac(mac, bssid));
2978 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2979 }
2980 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2981 printk(KERN_DEBUG " did not try to join ibss\n");
2982 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2983
2984 /* Selected IBSS not found in current scan results - try to scan */
2985 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2986 !ieee80211_sta_active_ibss(dev)) {
2987 mod_timer(&ifsta->timer, jiffies +
2988 IEEE80211_IBSS_MERGE_INTERVAL);
2989 } else if (time_after(jiffies, local->last_scan_completed +
2990 IEEE80211_SCAN_INTERVAL)) {
2991 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2992 "join\n", dev->name);
2993 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2994 ifsta->ssid_len);
2995 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2996 int interval = IEEE80211_SCAN_INTERVAL;
2997
2998 if (time_after(jiffies, ifsta->ibss_join_req +
2999 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3000 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3001 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
3002 return ieee80211_sta_create_ibss(dev, ifsta);
3003 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3004 printk(KERN_DEBUG "%s: IBSS not allowed on the"
3005 " configured channel %d (%d MHz)\n",
3006 dev->name, local->hw.conf.channel,
3007 local->hw.conf.freq);
3008 }
3009
3010 /* No IBSS found - decrease scan interval and continue
3011 * scanning. */
3012 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3013 }
3014
3015 ifsta->state = IEEE80211_IBSS_SEARCH;
3016 mod_timer(&ifsta->timer, jiffies + interval);
3017 return 0;
3018 }
3019
3020 return 0;
3021 }
3022
3023
3024 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3025 {
3026 struct ieee80211_sub_if_data *sdata;
3027 struct ieee80211_if_sta *ifsta;
3028 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3029
3030 if (len > IEEE80211_MAX_SSID_LEN)
3031 return -EINVAL;
3032
3033 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3034 * not defined. */
3035 if (local->ops->conf_tx) {
3036 struct ieee80211_tx_queue_params qparam;
3037 int i;
3038
3039 memset(&qparam, 0, sizeof(qparam));
3040 /* TODO: are these ok defaults for all hw_modes? */
3041 qparam.aifs = 2;
3042 qparam.cw_min =
3043 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3044 qparam.cw_max = 1023;
3045 qparam.burst_time = 0;
3046 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3047 {
3048 local->ops->conf_tx(local_to_hw(local),
3049 i + IEEE80211_TX_QUEUE_DATA0,
3050 &qparam);
3051 }
3052 /* IBSS uses different parameters for Beacon sending */
3053 qparam.cw_min++;
3054 qparam.cw_min *= 2;
3055 qparam.cw_min--;
3056 local->ops->conf_tx(local_to_hw(local),
3057 IEEE80211_TX_QUEUE_BEACON, &qparam);
3058 }
3059
3060 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3061 ifsta = &sdata->u.sta;
3062
3063 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3064 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3065 memcpy(ifsta->ssid, ssid, len);
3066 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3067 ifsta->ssid_len = len;
3068
3069 if (len)
3070 ifsta->flags |= IEEE80211_STA_SSID_SET;
3071 else
3072 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3073 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3074 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3075 ifsta->ibss_join_req = jiffies;
3076 ifsta->state = IEEE80211_IBSS_SEARCH;
3077 return ieee80211_sta_find_ibss(dev, ifsta);
3078 }
3079 return 0;
3080 }
3081
3082
3083 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3084 {
3085 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3086 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3087 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3088 *len = ifsta->ssid_len;
3089 return 0;
3090 }
3091
3092
3093 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3094 {
3095 struct ieee80211_sub_if_data *sdata;
3096 struct ieee80211_if_sta *ifsta;
3097 int res;
3098
3099 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3100 ifsta = &sdata->u.sta;
3101
3102 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3103 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3104 res = ieee80211_if_config(dev);
3105 if (res) {
3106 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3107 "the low-level driver\n", dev->name);
3108 return res;
3109 }
3110 }
3111
3112 if (is_valid_ether_addr(bssid))
3113 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3114 else
3115 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3116
3117 return 0;
3118 }
3119
3120
3121 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3122 struct ieee80211_sub_if_data *sdata,
3123 int powersave)
3124 {
3125 struct sk_buff *skb;
3126 struct ieee80211_hdr *nullfunc;
3127 u16 fc;
3128
3129 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3130 if (!skb) {
3131 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3132 "frame\n", sdata->dev->name);
3133 return;
3134 }
3135 skb_reserve(skb, local->hw.extra_tx_headroom);
3136
3137 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3138 memset(nullfunc, 0, 24);
3139 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3140 IEEE80211_FCTL_TODS;
3141 if (powersave)
3142 fc |= IEEE80211_FCTL_PM;
3143 nullfunc->frame_control = cpu_to_le16(fc);
3144 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3145 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3146 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3147
3148 ieee80211_sta_tx(sdata->dev, skb, 0);
3149 }
3150
3151
3152 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3153 {
3154 struct ieee80211_local *local = hw_to_local(hw);
3155 struct net_device *dev = local->scan_dev;
3156 struct ieee80211_sub_if_data *sdata;
3157 union iwreq_data wrqu;
3158
3159 local->last_scan_completed = jiffies;
3160 memset(&wrqu, 0, sizeof(wrqu));
3161 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3162
3163 if (local->sta_hw_scanning) {
3164 local->sta_hw_scanning = 0;
3165 goto done;
3166 }
3167
3168 local->sta_sw_scanning = 0;
3169 if (ieee80211_hw_config(local))
3170 printk(KERN_DEBUG "%s: failed to restore operational "
3171 "channel after scan\n", dev->name);
3172
3173
3174 netif_tx_lock_bh(local->mdev);
3175 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3176 local->ops->configure_filter(local_to_hw(local),
3177 FIF_BCN_PRBRESP_PROMISC,
3178 &local->filter_flags,
3179 local->mdev->mc_count,
3180 local->mdev->mc_list);
3181
3182 netif_tx_unlock_bh(local->mdev);
3183
3184 rcu_read_lock();
3185 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3186
3187 /* No need to wake the master device. */
3188 if (sdata->dev == local->mdev)
3189 continue;
3190
3191 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3192 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3193 ieee80211_send_nullfunc(local, sdata, 0);
3194 ieee80211_sta_timer((unsigned long)sdata);
3195 }
3196
3197 netif_wake_queue(sdata->dev);
3198 }
3199 rcu_read_unlock();
3200
3201 done:
3202 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3203 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3204 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3205 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3206 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3207 !ieee80211_sta_active_ibss(dev)))
3208 ieee80211_sta_find_ibss(dev, ifsta);
3209 }
3210 }
3211 EXPORT_SYMBOL(ieee80211_scan_completed);
3212
3213 void ieee80211_sta_scan_work(struct work_struct *work)
3214 {
3215 struct ieee80211_local *local =
3216 container_of(work, struct ieee80211_local, scan_work.work);
3217 struct net_device *dev = local->scan_dev;
3218 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3219 struct ieee80211_hw_mode *mode;
3220 struct ieee80211_channel *chan;
3221 int skip;
3222 unsigned long next_delay = 0;
3223
3224 if (!local->sta_sw_scanning)
3225 return;
3226
3227 switch (local->scan_state) {
3228 case SCAN_SET_CHANNEL:
3229 mode = local->scan_hw_mode;
3230 if (local->scan_hw_mode->list.next == &local->modes_list &&
3231 local->scan_channel_idx >= mode->num_channels) {
3232 ieee80211_scan_completed(local_to_hw(local));
3233 return;
3234 }
3235 skip = !(local->enabled_modes & (1 << mode->mode));
3236 chan = &mode->channels[local->scan_channel_idx];
3237 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3238 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3239 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3240 (local->hw_modes & local->enabled_modes &
3241 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3242 skip = 1;
3243
3244 if (!skip) {
3245 #if 0
3246 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3247 dev->name, chan->chan, chan->freq);
3248 #endif
3249
3250 local->scan_channel = chan;
3251 if (ieee80211_hw_config(local)) {
3252 printk(KERN_DEBUG "%s: failed to set channel "
3253 "%d (%d MHz) for scan\n", dev->name,
3254 chan->chan, chan->freq);
3255 skip = 1;
3256 }
3257 }
3258
3259 local->scan_channel_idx++;
3260 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3261 if (local->scan_hw_mode->list.next != &local->modes_list) {
3262 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3263 struct ieee80211_hw_mode,
3264 list);
3265 local->scan_channel_idx = 0;
3266 }
3267 }
3268
3269 if (skip)
3270 break;
3271
3272 next_delay = IEEE80211_PROBE_DELAY +
3273 usecs_to_jiffies(local->hw.channel_change_time);
3274 local->scan_state = SCAN_SEND_PROBE;
3275 break;
3276 case SCAN_SEND_PROBE:
3277 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3278 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3279 local->scan_ssid_len);
3280 next_delay = IEEE80211_CHANNEL_TIME;
3281 } else
3282 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3283 local->scan_state = SCAN_SET_CHANNEL;
3284 break;
3285 }
3286
3287 if (local->sta_sw_scanning)
3288 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3289 next_delay);
3290 }
3291
3292
3293 static int ieee80211_sta_start_scan(struct net_device *dev,
3294 u8 *ssid, size_t ssid_len)
3295 {
3296 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3297 struct ieee80211_sub_if_data *sdata;
3298
3299 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3300 return -EINVAL;
3301
3302 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3303 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3304 * BSSID: MACAddress
3305 * SSID
3306 * ScanType: ACTIVE, PASSIVE
3307 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3308 * a Probe frame during active scanning
3309 * ChannelList
3310 * MinChannelTime (>= ProbeDelay), in TU
3311 * MaxChannelTime: (>= MinChannelTime), in TU
3312 */
3313
3314 /* MLME-SCAN.confirm
3315 * BSSDescriptionSet
3316 * ResultCode: SUCCESS, INVALID_PARAMETERS
3317 */
3318
3319 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3320 if (local->scan_dev == dev)
3321 return 0;
3322 return -EBUSY;
3323 }
3324
3325 if (local->ops->hw_scan) {
3326 int rc = local->ops->hw_scan(local_to_hw(local),
3327 ssid, ssid_len);
3328 if (!rc) {
3329 local->sta_hw_scanning = 1;
3330 local->scan_dev = dev;
3331 }
3332 return rc;
3333 }
3334
3335 local->sta_sw_scanning = 1;
3336
3337 rcu_read_lock();
3338 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3339
3340 /* Don't stop the master interface, otherwise we can't transmit
3341 * probes! */
3342 if (sdata->dev == local->mdev)
3343 continue;
3344
3345 netif_stop_queue(sdata->dev);
3346 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3347 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3348 ieee80211_send_nullfunc(local, sdata, 1);
3349 }
3350 rcu_read_unlock();
3351
3352 if (ssid) {
3353 local->scan_ssid_len = ssid_len;
3354 memcpy(local->scan_ssid, ssid, ssid_len);
3355 } else
3356 local->scan_ssid_len = 0;
3357 local->scan_state = SCAN_SET_CHANNEL;
3358 local->scan_hw_mode = list_entry(local->modes_list.next,
3359 struct ieee80211_hw_mode,
3360 list);
3361 local->scan_channel_idx = 0;
3362 local->scan_dev = dev;
3363
3364 netif_tx_lock_bh(local->mdev);
3365 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3366 local->ops->configure_filter(local_to_hw(local),
3367 FIF_BCN_PRBRESP_PROMISC,
3368 &local->filter_flags,
3369 local->mdev->mc_count,
3370 local->mdev->mc_list);
3371 netif_tx_unlock_bh(local->mdev);
3372
3373 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3374 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3375 IEEE80211_CHANNEL_TIME);
3376
3377 return 0;
3378 }
3379
3380
3381 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3382 {
3383 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3384 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3385 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3386
3387 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3388 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3389
3390 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3391 if (local->scan_dev == dev)
3392 return 0;
3393 return -EBUSY;
3394 }
3395
3396 ifsta->scan_ssid_len = ssid_len;
3397 if (ssid_len)
3398 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3399 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3400 queue_work(local->hw.workqueue, &ifsta->work);
3401 return 0;
3402 }
3403
3404 static char *
3405 ieee80211_sta_scan_result(struct net_device *dev,
3406 struct ieee80211_sta_bss *bss,
3407 char *current_ev, char *end_buf)
3408 {
3409 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3410 struct iw_event iwe;
3411
3412 if (time_after(jiffies,
3413 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3414 return current_ev;
3415
3416 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3417 return current_ev;
3418
3419 memset(&iwe, 0, sizeof(iwe));
3420 iwe.cmd = SIOCGIWAP;
3421 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3422 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3423 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3424 IW_EV_ADDR_LEN);
3425
3426 memset(&iwe, 0, sizeof(iwe));
3427 iwe.cmd = SIOCGIWESSID;
3428 iwe.u.data.length = bss->ssid_len;
3429 iwe.u.data.flags = 1;
3430 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3431 bss->ssid);
3432
3433 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3434 memset(&iwe, 0, sizeof(iwe));
3435 iwe.cmd = SIOCGIWMODE;
3436 if (bss->capability & WLAN_CAPABILITY_ESS)
3437 iwe.u.mode = IW_MODE_MASTER;
3438 else
3439 iwe.u.mode = IW_MODE_ADHOC;
3440 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3441 IW_EV_UINT_LEN);
3442 }
3443
3444 memset(&iwe, 0, sizeof(iwe));
3445 iwe.cmd = SIOCGIWFREQ;
3446 iwe.u.freq.m = bss->channel;
3447 iwe.u.freq.e = 0;
3448 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3449 IW_EV_FREQ_LEN);
3450 iwe.u.freq.m = bss->freq * 100000;
3451 iwe.u.freq.e = 1;
3452 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3453 IW_EV_FREQ_LEN);
3454
3455 memset(&iwe, 0, sizeof(iwe));
3456 iwe.cmd = IWEVQUAL;
3457 iwe.u.qual.qual = bss->signal;
3458 iwe.u.qual.level = bss->rssi;
3459 iwe.u.qual.noise = bss->noise;
3460 iwe.u.qual.updated = local->wstats_flags;
3461 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3462 IW_EV_QUAL_LEN);
3463
3464 memset(&iwe, 0, sizeof(iwe));
3465 iwe.cmd = SIOCGIWENCODE;
3466 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3467 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3468 else
3469 iwe.u.data.flags = IW_ENCODE_DISABLED;
3470 iwe.u.data.length = 0;
3471 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3472
3473 if (bss && bss->wpa_ie) {
3474 memset(&iwe, 0, sizeof(iwe));
3475 iwe.cmd = IWEVGENIE;
3476 iwe.u.data.length = bss->wpa_ie_len;
3477 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3478 bss->wpa_ie);
3479 }
3480
3481 if (bss && bss->rsn_ie) {
3482 memset(&iwe, 0, sizeof(iwe));
3483 iwe.cmd = IWEVGENIE;
3484 iwe.u.data.length = bss->rsn_ie_len;
3485 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3486 bss->rsn_ie);
3487 }
3488
3489 if (bss && bss->supp_rates_len > 0) {
3490 /* display all supported rates in readable format */
3491 char *p = current_ev + IW_EV_LCP_LEN;
3492 int i;
3493
3494 memset(&iwe, 0, sizeof(iwe));
3495 iwe.cmd = SIOCGIWRATE;
3496 /* Those two flags are ignored... */
3497 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3498
3499 for (i = 0; i < bss->supp_rates_len; i++) {
3500 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3501 0x7f) * 500000);
3502 p = iwe_stream_add_value(current_ev, p,
3503 end_buf, &iwe, IW_EV_PARAM_LEN);
3504 }
3505 current_ev = p;
3506 }
3507
3508 if (bss) {
3509 char *buf;
3510 buf = kmalloc(30, GFP_ATOMIC);
3511 if (buf) {
3512 memset(&iwe, 0, sizeof(iwe));
3513 iwe.cmd = IWEVCUSTOM;
3514 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3515 iwe.u.data.length = strlen(buf);
3516 current_ev = iwe_stream_add_point(current_ev, end_buf,
3517 &iwe, buf);
3518 kfree(buf);
3519 }
3520 }
3521
3522 return current_ev;
3523 }
3524
3525
3526 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3527 {
3528 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3529 char *current_ev = buf;
3530 char *end_buf = buf + len;
3531 struct ieee80211_sta_bss *bss;
3532
3533 spin_lock_bh(&local->sta_bss_lock);
3534 list_for_each_entry(bss, &local->sta_bss_list, list) {
3535 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3536 spin_unlock_bh(&local->sta_bss_lock);
3537 return -E2BIG;
3538 }
3539 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3540 end_buf);
3541 }
3542 spin_unlock_bh(&local->sta_bss_lock);
3543 return current_ev - buf;
3544 }
3545
3546
3547 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3548 {
3549 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3550 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3551 kfree(ifsta->extra_ie);
3552 if (len == 0) {
3553 ifsta->extra_ie = NULL;
3554 ifsta->extra_ie_len = 0;
3555 return 0;
3556 }
3557 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3558 if (!ifsta->extra_ie) {
3559 ifsta->extra_ie_len = 0;
3560 return -ENOMEM;
3561 }
3562 memcpy(ifsta->extra_ie, ie, len);
3563 ifsta->extra_ie_len = len;
3564 return 0;
3565 }
3566
3567
3568 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3569 struct sk_buff *skb, u8 *bssid,
3570 u8 *addr)
3571 {
3572 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3573 struct sta_info *sta;
3574 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3575 DECLARE_MAC_BUF(mac);
3576
3577 /* TODO: Could consider removing the least recently used entry and
3578 * allow new one to be added. */
3579 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3580 if (net_ratelimit()) {
3581 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3582 "entry %s\n", dev->name, print_mac(mac, addr));
3583 }
3584 return NULL;
3585 }
3586
3587 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3588 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3589
3590 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3591 if (!sta)
3592 return NULL;
3593
3594 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3595
3596 rate_control_rate_init(sta, local);
3597
3598 return sta; /* caller will call sta_info_put() */
3599 }
3600
3601
3602 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3603 {
3604 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3605 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3606
3607 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3608 dev->name, reason);
3609
3610 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3611 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3612 return -EINVAL;
3613
3614 ieee80211_send_deauth(dev, ifsta, reason);
3615 ieee80211_set_disassoc(dev, ifsta, 1);
3616 return 0;
3617 }
3618
3619
3620 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3621 {
3622 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3623 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3624
3625 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3626 dev->name, reason);
3627
3628 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3629 return -EINVAL;
3630
3631 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3632 return -1;
3633
3634 ieee80211_send_disassoc(dev, ifsta, reason);
3635 ieee80211_set_disassoc(dev, ifsta, 0);
3636 return 0;
3637 }
3638
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