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mac80211: enable IBSS merging
[deliverable/linux.git] / net / mac80211 / ieee80211_sta.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 /* TODO:
15 * 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 freq,
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 return (1 << ecw) - 1;
231 }
232
233 static void ieee80211_sta_wmm_params(struct net_device *dev,
234 struct ieee80211_if_sta *ifsta,
235 u8 *wmm_param, size_t wmm_param_len)
236 {
237 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
238 struct ieee80211_tx_queue_params params;
239 size_t left;
240 int count;
241 u8 *pos;
242
243 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
244 return;
245 count = wmm_param[6] & 0x0f;
246 if (count == ifsta->wmm_last_param_set)
247 return;
248 ifsta->wmm_last_param_set = count;
249
250 pos = wmm_param + 8;
251 left = wmm_param_len - 8;
252
253 memset(&params, 0, sizeof(params));
254
255 if (!local->ops->conf_tx)
256 return;
257
258 local->wmm_acm = 0;
259 for (; left >= 4; left -= 4, pos += 4) {
260 int aci = (pos[0] >> 5) & 0x03;
261 int acm = (pos[0] >> 4) & 0x01;
262 int queue;
263
264 switch (aci) {
265 case 1:
266 queue = IEEE80211_TX_QUEUE_DATA3;
267 if (acm) {
268 local->wmm_acm |= BIT(0) | BIT(3);
269 }
270 break;
271 case 2:
272 queue = IEEE80211_TX_QUEUE_DATA1;
273 if (acm) {
274 local->wmm_acm |= BIT(4) | BIT(5);
275 }
276 break;
277 case 3:
278 queue = IEEE80211_TX_QUEUE_DATA0;
279 if (acm) {
280 local->wmm_acm |= BIT(6) | BIT(7);
281 }
282 break;
283 case 0:
284 default:
285 queue = IEEE80211_TX_QUEUE_DATA2;
286 if (acm) {
287 local->wmm_acm |= BIT(1) | BIT(2);
288 }
289 break;
290 }
291
292 params.aifs = pos[0] & 0x0f;
293 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
294 params.cw_min = ecw2cw(pos[1] & 0x0f);
295 params.txop = pos[2] | (pos[3] << 8);
296 #ifdef CONFIG_MAC80211_DEBUG
297 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
298 "cWmin=%d cWmax=%d txop=%d\n",
299 dev->name, queue, aci, acm, params.aifs, params.cw_min,
300 params.cw_max, params.txop);
301 #endif
302 /* TODO: handle ACM (block TX, fallback to next lowest allowed
303 * AC for now) */
304 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
305 printk(KERN_DEBUG "%s: failed to set TX queue "
306 "parameters for queue %d\n", dev->name, queue);
307 }
308 }
309 }
310
311
312 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
313 u8 erp_value)
314 {
315 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
316 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
317 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
318 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
319 DECLARE_MAC_BUF(mac);
320 u32 changed = 0;
321
322 if (use_protection != bss_conf->use_cts_prot) {
323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
325 "%s)\n",
326 sdata->dev->name,
327 use_protection ? "enabled" : "disabled",
328 print_mac(mac, ifsta->bssid));
329 }
330 bss_conf->use_cts_prot = use_protection;
331 changed |= BSS_CHANGED_ERP_CTS_PROT;
332 }
333
334 if (preamble_mode != bss_conf->use_short_preamble) {
335 if (net_ratelimit()) {
336 printk(KERN_DEBUG "%s: switched to %s barker preamble"
337 " (BSSID=%s)\n",
338 sdata->dev->name,
339 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
340 "short" : "long",
341 print_mac(mac, ifsta->bssid));
342 }
343 bss_conf->use_short_preamble = preamble_mode;
344 changed |= BSS_CHANGED_ERP_PREAMBLE;
345 }
346
347 return changed;
348 }
349
350 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
351 struct ieee80211_ht_info *ht_info)
352 {
353
354 if (ht_info == NULL)
355 return -EINVAL;
356
357 memset(ht_info, 0, sizeof(*ht_info));
358
359 if (ht_cap_ie) {
360 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
361
362 ht_info->ht_supported = 1;
363 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
364 ht_info->ampdu_factor =
365 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
366 ht_info->ampdu_density =
367 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
368 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
369 } else
370 ht_info->ht_supported = 0;
371
372 return 0;
373 }
374
375 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
376 struct ieee80211_ht_addt_info *ht_add_info_ie,
377 struct ieee80211_ht_bss_info *bss_info)
378 {
379 if (bss_info == NULL)
380 return -EINVAL;
381
382 memset(bss_info, 0, sizeof(*bss_info));
383
384 if (ht_add_info_ie) {
385 u16 op_mode;
386 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
387
388 bss_info->primary_channel = ht_add_info_ie->control_chan;
389 bss_info->bss_cap = ht_add_info_ie->ht_param;
390 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
391 }
392
393 return 0;
394 }
395
396 static void ieee80211_sta_send_associnfo(struct net_device *dev,
397 struct ieee80211_if_sta *ifsta)
398 {
399 char *buf;
400 size_t len;
401 int i;
402 union iwreq_data wrqu;
403
404 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
405 return;
406
407 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
408 ifsta->assocresp_ies_len), GFP_KERNEL);
409 if (!buf)
410 return;
411
412 len = sprintf(buf, "ASSOCINFO(");
413 if (ifsta->assocreq_ies) {
414 len += sprintf(buf + len, "ReqIEs=");
415 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
416 len += sprintf(buf + len, "%02x",
417 ifsta->assocreq_ies[i]);
418 }
419 }
420 if (ifsta->assocresp_ies) {
421 if (ifsta->assocreq_ies)
422 len += sprintf(buf + len, " ");
423 len += sprintf(buf + len, "RespIEs=");
424 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
425 len += sprintf(buf + len, "%02x",
426 ifsta->assocresp_ies[i]);
427 }
428 }
429 len += sprintf(buf + len, ")");
430
431 if (len > IW_CUSTOM_MAX) {
432 len = sprintf(buf, "ASSOCRESPIE=");
433 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
434 len += sprintf(buf + len, "%02x",
435 ifsta->assocresp_ies[i]);
436 }
437 }
438
439 memset(&wrqu, 0, sizeof(wrqu));
440 wrqu.data.length = len;
441 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
442
443 kfree(buf);
444 }
445
446
447 static void ieee80211_set_associated(struct net_device *dev,
448 struct ieee80211_if_sta *ifsta,
449 bool assoc)
450 {
451 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
452 struct ieee80211_local *local = sdata->local;
453 union iwreq_data wrqu;
454 u32 changed = BSS_CHANGED_ASSOC;
455
456 if (assoc) {
457 struct ieee80211_sta_bss *bss;
458
459 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
460
461 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
462 return;
463
464 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
465 local->hw.conf.channel->center_freq,
466 ifsta->ssid, ifsta->ssid_len);
467 if (bss) {
468 if (bss->has_erp_value)
469 changed |= ieee80211_handle_erp_ie(
470 sdata, bss->erp_value);
471 ieee80211_rx_bss_put(dev, bss);
472 }
473
474 netif_carrier_on(dev);
475 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
476 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
477 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
478 ieee80211_sta_send_associnfo(dev, ifsta);
479 } else {
480 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
481
482 netif_carrier_off(dev);
483 ieee80211_reset_erp_info(dev);
484 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
485 }
486 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
487 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
488 ifsta->last_probe = jiffies;
489 ieee80211_led_assoc(local, assoc);
490
491 sdata->bss_conf.assoc = assoc;
492 ieee80211_bss_info_change_notify(sdata, changed);
493 }
494
495 static void ieee80211_set_disassoc(struct net_device *dev,
496 struct ieee80211_if_sta *ifsta, int deauth)
497 {
498 if (deauth)
499 ifsta->auth_tries = 0;
500 ifsta->assoc_tries = 0;
501 ieee80211_set_associated(dev, ifsta, 0);
502 }
503
504 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
505 int encrypt)
506 {
507 struct ieee80211_sub_if_data *sdata;
508 struct ieee80211_tx_packet_data *pkt_data;
509
510 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
511 skb->dev = sdata->local->mdev;
512 skb_set_mac_header(skb, 0);
513 skb_set_network_header(skb, 0);
514 skb_set_transport_header(skb, 0);
515
516 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
517 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
518 pkt_data->ifindex = sdata->dev->ifindex;
519 if (!encrypt)
520 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
521
522 dev_queue_xmit(skb);
523 }
524
525
526 static void ieee80211_send_auth(struct net_device *dev,
527 struct ieee80211_if_sta *ifsta,
528 int transaction, u8 *extra, size_t extra_len,
529 int encrypt)
530 {
531 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
532 struct sk_buff *skb;
533 struct ieee80211_mgmt *mgmt;
534
535 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
536 sizeof(*mgmt) + 6 + extra_len);
537 if (!skb) {
538 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
539 "frame\n", dev->name);
540 return;
541 }
542 skb_reserve(skb, local->hw.extra_tx_headroom);
543
544 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
545 memset(mgmt, 0, 24 + 6);
546 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
547 IEEE80211_STYPE_AUTH);
548 if (encrypt)
549 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
550 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
551 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
552 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
553 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
554 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
555 ifsta->auth_transaction = transaction + 1;
556 mgmt->u.auth.status_code = cpu_to_le16(0);
557 if (extra)
558 memcpy(skb_put(skb, extra_len), extra, extra_len);
559
560 ieee80211_sta_tx(dev, skb, encrypt);
561 }
562
563
564 static void ieee80211_authenticate(struct net_device *dev,
565 struct ieee80211_if_sta *ifsta)
566 {
567 DECLARE_MAC_BUF(mac);
568
569 ifsta->auth_tries++;
570 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
571 printk(KERN_DEBUG "%s: authentication with AP %s"
572 " timed out\n",
573 dev->name, print_mac(mac, ifsta->bssid));
574 ifsta->state = IEEE80211_DISABLED;
575 return;
576 }
577
578 ifsta->state = IEEE80211_AUTHENTICATE;
579 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
580 dev->name, print_mac(mac, ifsta->bssid));
581
582 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
583
584 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
585 }
586
587
588 static void ieee80211_send_assoc(struct net_device *dev,
589 struct ieee80211_if_sta *ifsta)
590 {
591 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, *ies;
595 int i, len;
596 u16 capab;
597 struct ieee80211_sta_bss *bss;
598 int wmm = 0;
599 struct ieee80211_supported_band *sband;
600
601 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
602 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
603 ifsta->ssid_len);
604 if (!skb) {
605 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
606 "frame\n", dev->name);
607 return;
608 }
609 skb_reserve(skb, local->hw.extra_tx_headroom);
610
611 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
612
613 capab = ifsta->capab;
614
615 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
616 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
617 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
618 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
619 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
620 }
621
622 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
623 local->hw.conf.channel->center_freq,
624 ifsta->ssid, ifsta->ssid_len);
625 if (bss) {
626 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
627 capab |= WLAN_CAPABILITY_PRIVACY;
628 if (bss->wmm_ie) {
629 wmm = 1;
630 }
631 ieee80211_rx_bss_put(dev, bss);
632 }
633
634 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
635 memset(mgmt, 0, 24);
636 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
637 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
638 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
639
640 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
641 skb_put(skb, 10);
642 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
643 IEEE80211_STYPE_REASSOC_REQ);
644 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
645 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
646 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
647 ETH_ALEN);
648 } else {
649 skb_put(skb, 4);
650 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
651 IEEE80211_STYPE_ASSOC_REQ);
652 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
653 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
654 }
655
656 /* SSID */
657 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
658 *pos++ = WLAN_EID_SSID;
659 *pos++ = ifsta->ssid_len;
660 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
661
662 len = sband->n_bitrates;
663 if (len > 8)
664 len = 8;
665 pos = skb_put(skb, len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = len;
668 for (i = 0; i < len; i++) {
669 int rate = sband->bitrates[i].bitrate;
670 *pos++ = (u8) (rate / 5);
671 }
672
673 if (sband->n_bitrates > len) {
674 pos = skb_put(skb, sband->n_bitrates - len + 2);
675 *pos++ = WLAN_EID_EXT_SUPP_RATES;
676 *pos++ = sband->n_bitrates - len;
677 for (i = len; i < sband->n_bitrates; i++) {
678 int rate = sband->bitrates[i].bitrate;
679 *pos++ = (u8) (rate / 5);
680 }
681 }
682
683 if (ifsta->extra_ie) {
684 pos = skb_put(skb, ifsta->extra_ie_len);
685 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
686 }
687
688 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
689 pos = skb_put(skb, 9);
690 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
691 *pos++ = 7; /* len */
692 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
693 *pos++ = 0x50;
694 *pos++ = 0xf2;
695 *pos++ = 2; /* WME */
696 *pos++ = 0; /* WME info */
697 *pos++ = 1; /* WME ver */
698 *pos++ = 0;
699 }
700 /* wmm support is a must to HT */
701 if (wmm && sband->ht_info.ht_supported) {
702 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
703 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
704 *pos++ = WLAN_EID_HT_CAPABILITY;
705 *pos++ = sizeof(struct ieee80211_ht_cap);
706 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
707 memcpy(pos, &tmp, sizeof(u16));
708 pos += sizeof(u16);
709 /* TODO: needs a define here for << 2 */
710 *pos++ = sband->ht_info.ampdu_factor |
711 (sband->ht_info.ampdu_density << 2);
712 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
713 }
714
715 kfree(ifsta->assocreq_ies);
716 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
717 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
718 if (ifsta->assocreq_ies)
719 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
720
721 ieee80211_sta_tx(dev, skb, 0);
722 }
723
724
725 static void ieee80211_send_deauth(struct net_device *dev,
726 struct ieee80211_if_sta *ifsta, u16 reason)
727 {
728 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
729 struct sk_buff *skb;
730 struct ieee80211_mgmt *mgmt;
731
732 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
733 if (!skb) {
734 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
735 "frame\n", dev->name);
736 return;
737 }
738 skb_reserve(skb, local->hw.extra_tx_headroom);
739
740 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
741 memset(mgmt, 0, 24);
742 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
743 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
744 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
745 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
746 IEEE80211_STYPE_DEAUTH);
747 skb_put(skb, 2);
748 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
749
750 ieee80211_sta_tx(dev, skb, 0);
751 }
752
753
754 static void ieee80211_send_disassoc(struct net_device *dev,
755 struct ieee80211_if_sta *ifsta, u16 reason)
756 {
757 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
758 struct sk_buff *skb;
759 struct ieee80211_mgmt *mgmt;
760
761 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
762 if (!skb) {
763 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
764 "frame\n", dev->name);
765 return;
766 }
767 skb_reserve(skb, local->hw.extra_tx_headroom);
768
769 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
770 memset(mgmt, 0, 24);
771 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
772 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
773 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
774 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
775 IEEE80211_STYPE_DISASSOC);
776 skb_put(skb, 2);
777 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
778
779 ieee80211_sta_tx(dev, skb, 0);
780 }
781
782
783 static int ieee80211_privacy_mismatch(struct net_device *dev,
784 struct ieee80211_if_sta *ifsta)
785 {
786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
787 struct ieee80211_sta_bss *bss;
788 int bss_privacy;
789 int wep_privacy;
790 int privacy_invoked;
791
792 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
793 return 0;
794
795 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
796 local->hw.conf.channel->center_freq,
797 ifsta->ssid, ifsta->ssid_len);
798 if (!bss)
799 return 0;
800
801 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
802 wep_privacy = !!ieee80211_sta_wep_configured(dev);
803 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
804
805 ieee80211_rx_bss_put(dev, bss);
806
807 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
808 return 0;
809
810 return 1;
811 }
812
813
814 static void ieee80211_associate(struct net_device *dev,
815 struct ieee80211_if_sta *ifsta)
816 {
817 DECLARE_MAC_BUF(mac);
818
819 ifsta->assoc_tries++;
820 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
821 printk(KERN_DEBUG "%s: association with AP %s"
822 " timed out\n",
823 dev->name, print_mac(mac, ifsta->bssid));
824 ifsta->state = IEEE80211_DISABLED;
825 return;
826 }
827
828 ifsta->state = IEEE80211_ASSOCIATE;
829 printk(KERN_DEBUG "%s: associate with AP %s\n",
830 dev->name, print_mac(mac, ifsta->bssid));
831 if (ieee80211_privacy_mismatch(dev, ifsta)) {
832 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
833 "mixed-cell disabled - abort association\n", dev->name);
834 ifsta->state = IEEE80211_DISABLED;
835 return;
836 }
837
838 ieee80211_send_assoc(dev, ifsta);
839
840 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
841 }
842
843
844 static void ieee80211_associated(struct net_device *dev,
845 struct ieee80211_if_sta *ifsta)
846 {
847 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
848 struct sta_info *sta;
849 int disassoc;
850 DECLARE_MAC_BUF(mac);
851
852 /* TODO: start monitoring current AP signal quality and number of
853 * missed beacons. Scan other channels every now and then and search
854 * for better APs. */
855 /* TODO: remove expired BSSes */
856
857 ifsta->state = IEEE80211_ASSOCIATED;
858
859 sta = sta_info_get(local, ifsta->bssid);
860 if (!sta) {
861 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
862 dev->name, print_mac(mac, ifsta->bssid));
863 disassoc = 1;
864 } else {
865 disassoc = 0;
866 if (time_after(jiffies,
867 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
868 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
869 printk(KERN_DEBUG "%s: No ProbeResp from "
870 "current AP %s - assume out of "
871 "range\n",
872 dev->name, print_mac(mac, ifsta->bssid));
873 disassoc = 1;
874 sta_info_free(sta);
875 } else
876 ieee80211_send_probe_req(dev, ifsta->bssid,
877 local->scan_ssid,
878 local->scan_ssid_len);
879 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
880 } else {
881 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
882 if (time_after(jiffies, ifsta->last_probe +
883 IEEE80211_PROBE_INTERVAL)) {
884 ifsta->last_probe = jiffies;
885 ieee80211_send_probe_req(dev, ifsta->bssid,
886 ifsta->ssid,
887 ifsta->ssid_len);
888 }
889 }
890 sta_info_put(sta);
891 }
892 if (disassoc) {
893 ifsta->state = IEEE80211_DISABLED;
894 ieee80211_set_associated(dev, ifsta, 0);
895 } else {
896 mod_timer(&ifsta->timer, jiffies +
897 IEEE80211_MONITORING_INTERVAL);
898 }
899 }
900
901
902 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
903 u8 *ssid, size_t ssid_len)
904 {
905 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
906 struct ieee80211_supported_band *sband;
907 struct sk_buff *skb;
908 struct ieee80211_mgmt *mgmt;
909 u8 *pos, *supp_rates, *esupp_rates = NULL;
910 int i;
911
912 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
913 if (!skb) {
914 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
915 "request\n", dev->name);
916 return;
917 }
918 skb_reserve(skb, local->hw.extra_tx_headroom);
919
920 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
921 memset(mgmt, 0, 24);
922 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
923 IEEE80211_STYPE_PROBE_REQ);
924 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
925 if (dst) {
926 memcpy(mgmt->da, dst, ETH_ALEN);
927 memcpy(mgmt->bssid, dst, ETH_ALEN);
928 } else {
929 memset(mgmt->da, 0xff, ETH_ALEN);
930 memset(mgmt->bssid, 0xff, ETH_ALEN);
931 }
932 pos = skb_put(skb, 2 + ssid_len);
933 *pos++ = WLAN_EID_SSID;
934 *pos++ = ssid_len;
935 memcpy(pos, ssid, ssid_len);
936
937 supp_rates = skb_put(skb, 2);
938 supp_rates[0] = WLAN_EID_SUPP_RATES;
939 supp_rates[1] = 0;
940 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
941
942 for (i = 0; i < sband->n_bitrates; i++) {
943 struct ieee80211_rate *rate = &sband->bitrates[i];
944 if (esupp_rates) {
945 pos = skb_put(skb, 1);
946 esupp_rates[1]++;
947 } else if (supp_rates[1] == 8) {
948 esupp_rates = skb_put(skb, 3);
949 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
950 esupp_rates[1] = 1;
951 pos = &esupp_rates[2];
952 } else {
953 pos = skb_put(skb, 1);
954 supp_rates[1]++;
955 }
956 *pos = rate->bitrate / 5;
957 }
958
959 ieee80211_sta_tx(dev, skb, 0);
960 }
961
962
963 static int ieee80211_sta_wep_configured(struct net_device *dev)
964 {
965 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
966 if (!sdata || !sdata->default_key ||
967 sdata->default_key->conf.alg != ALG_WEP)
968 return 0;
969 return 1;
970 }
971
972
973 static void ieee80211_auth_completed(struct net_device *dev,
974 struct ieee80211_if_sta *ifsta)
975 {
976 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
977 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
978 ieee80211_associate(dev, ifsta);
979 }
980
981
982 static void ieee80211_auth_challenge(struct net_device *dev,
983 struct ieee80211_if_sta *ifsta,
984 struct ieee80211_mgmt *mgmt,
985 size_t len)
986 {
987 u8 *pos;
988 struct ieee802_11_elems elems;
989
990 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
991 pos = mgmt->u.auth.variable;
992 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
993 if (!elems.challenge) {
994 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
995 "frame\n", dev->name);
996 return;
997 }
998 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
999 elems.challenge_len + 2, 1);
1000 }
1001
1002 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1003 u8 dialog_token, u16 status, u16 policy,
1004 u16 buf_size, u16 timeout)
1005 {
1006 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1008 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1009 struct sk_buff *skb;
1010 struct ieee80211_mgmt *mgmt;
1011 u16 capab;
1012
1013 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1014 sizeof(mgmt->u.action.u.addba_resp));
1015 if (!skb) {
1016 printk(KERN_DEBUG "%s: failed to allocate buffer "
1017 "for addba resp frame\n", dev->name);
1018 return;
1019 }
1020
1021 skb_reserve(skb, local->hw.extra_tx_headroom);
1022 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1023 memset(mgmt, 0, 24);
1024 memcpy(mgmt->da, da, ETH_ALEN);
1025 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1026 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1027 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1028 else
1029 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1030 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1031 IEEE80211_STYPE_ACTION);
1032
1033 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1034 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1035 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1036 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1037
1038 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1039 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1040 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1041
1042 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1043 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1044 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1045
1046 ieee80211_sta_tx(dev, skb, 0);
1047
1048 return;
1049 }
1050
1051 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1052 u16 tid, u8 dialog_token, u16 start_seq_num,
1053 u16 agg_size, u16 timeout)
1054 {
1055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1056 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1057 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1058 struct sk_buff *skb;
1059 struct ieee80211_mgmt *mgmt;
1060 u16 capab;
1061
1062 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1063 sizeof(mgmt->u.action.u.addba_req));
1064
1065
1066 if (!skb) {
1067 printk(KERN_ERR "%s: failed to allocate buffer "
1068 "for addba request frame\n", dev->name);
1069 return;
1070 }
1071 skb_reserve(skb, local->hw.extra_tx_headroom);
1072 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1073 memset(mgmt, 0, 24);
1074 memcpy(mgmt->da, da, ETH_ALEN);
1075 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1076 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1077 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1078 else
1079 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1080
1081 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1082 IEEE80211_STYPE_ACTION);
1083
1084 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1085
1086 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1087 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1088
1089 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1090 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1091 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1092 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1093
1094 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1095
1096 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1097 mgmt->u.action.u.addba_req.start_seq_num =
1098 cpu_to_le16(start_seq_num << 4);
1099
1100 ieee80211_sta_tx(dev, skb, 0);
1101 }
1102
1103 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1104 struct ieee80211_mgmt *mgmt,
1105 size_t len)
1106 {
1107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1108 struct ieee80211_hw *hw = &local->hw;
1109 struct ieee80211_conf *conf = &hw->conf;
1110 struct sta_info *sta;
1111 struct tid_ampdu_rx *tid_agg_rx;
1112 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1113 u8 dialog_token;
1114 int ret = -EOPNOTSUPP;
1115 DECLARE_MAC_BUF(mac);
1116
1117 sta = sta_info_get(local, mgmt->sa);
1118 if (!sta)
1119 return;
1120
1121 /* extract session parameters from addba request frame */
1122 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1123 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1124 start_seq_num =
1125 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1126
1127 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1128 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1129 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1130 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1131
1132 status = WLAN_STATUS_REQUEST_DECLINED;
1133
1134 /* sanity check for incoming parameters:
1135 * check if configuration can support the BA policy
1136 * and if buffer size does not exceeds max value */
1137 if (((ba_policy != 1)
1138 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1139 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1140 status = WLAN_STATUS_INVALID_QOS_PARAM;
1141 #ifdef CONFIG_MAC80211_HT_DEBUG
1142 if (net_ratelimit())
1143 printk(KERN_DEBUG "Block Ack Req with bad params from "
1144 "%s on tid %u. policy %d, buffer size %d\n",
1145 print_mac(mac, mgmt->sa), tid, ba_policy,
1146 buf_size);
1147 #endif /* CONFIG_MAC80211_HT_DEBUG */
1148 goto end_no_lock;
1149 }
1150 /* determine default buffer size */
1151 if (buf_size == 0) {
1152 struct ieee80211_supported_band *sband;
1153
1154 sband = local->hw.wiphy->bands[conf->channel->band];
1155 buf_size = IEEE80211_MIN_AMPDU_BUF;
1156 buf_size = buf_size << sband->ht_info.ampdu_factor;
1157 }
1158
1159 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1160
1161 /* examine state machine */
1162 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1163
1164 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1165 #ifdef CONFIG_MAC80211_HT_DEBUG
1166 if (net_ratelimit())
1167 printk(KERN_DEBUG "unexpected Block Ack Req from "
1168 "%s on tid %u\n",
1169 print_mac(mac, mgmt->sa), tid);
1170 #endif /* CONFIG_MAC80211_HT_DEBUG */
1171 goto end;
1172 }
1173
1174 /* prepare reordering buffer */
1175 tid_agg_rx->reorder_buf =
1176 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1177 if (!tid_agg_rx->reorder_buf) {
1178 if (net_ratelimit())
1179 printk(KERN_ERR "can not allocate reordering buffer "
1180 "to tid %d\n", tid);
1181 goto end;
1182 }
1183 memset(tid_agg_rx->reorder_buf, 0,
1184 buf_size * sizeof(struct sk_buf *));
1185
1186 if (local->ops->ampdu_action)
1187 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1188 sta->addr, tid, &start_seq_num);
1189 #ifdef CONFIG_MAC80211_HT_DEBUG
1190 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1191 #endif /* CONFIG_MAC80211_HT_DEBUG */
1192
1193 if (ret) {
1194 kfree(tid_agg_rx->reorder_buf);
1195 goto end;
1196 }
1197
1198 /* change state and send addba resp */
1199 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1200 tid_agg_rx->dialog_token = dialog_token;
1201 tid_agg_rx->ssn = start_seq_num;
1202 tid_agg_rx->head_seq_num = start_seq_num;
1203 tid_agg_rx->buf_size = buf_size;
1204 tid_agg_rx->timeout = timeout;
1205 tid_agg_rx->stored_mpdu_num = 0;
1206 status = WLAN_STATUS_SUCCESS;
1207 end:
1208 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1209
1210 end_no_lock:
1211 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1212 status, 1, buf_size, timeout);
1213 sta_info_put(sta);
1214 }
1215
1216 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1217 struct ieee80211_mgmt *mgmt,
1218 size_t len)
1219 {
1220 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1221 struct ieee80211_hw *hw = &local->hw;
1222 struct sta_info *sta;
1223 u16 capab;
1224 u16 tid;
1225 u8 *state;
1226
1227 sta = sta_info_get(local, mgmt->sa);
1228 if (!sta)
1229 return;
1230
1231 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1232 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1233
1234 state = &sta->ampdu_mlme.tid_tx[tid].state;
1235
1236 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1237
1238 if (mgmt->u.action.u.addba_resp.dialog_token !=
1239 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1240 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1241 #ifdef CONFIG_MAC80211_HT_DEBUG
1242 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1243 #endif /* CONFIG_MAC80211_HT_DEBUG */
1244 sta_info_put(sta);
1245 return;
1246 }
1247
1248 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1249 #ifdef CONFIG_MAC80211_HT_DEBUG
1250 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1251 #endif /* CONFIG_MAC80211_HT_DEBUG */
1252 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1253 == WLAN_STATUS_SUCCESS) {
1254 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1255 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1256 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1257 "%d\n", *state);
1258 sta_info_put(sta);
1259 return;
1260 }
1261
1262 if (*state & HT_ADDBA_RECEIVED_MSK)
1263 printk(KERN_DEBUG "double addBA response\n");
1264
1265 *state |= HT_ADDBA_RECEIVED_MSK;
1266 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1267
1268 if (*state == HT_AGG_STATE_OPERATIONAL) {
1269 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1270 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1271 }
1272
1273 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1274 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1275 } else {
1276 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1277
1278 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1279 /* this will allow the state check in stop_BA_session */
1280 *state = HT_AGG_STATE_OPERATIONAL;
1281 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1282 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1283 WLAN_BACK_INITIATOR);
1284 }
1285 sta_info_put(sta);
1286 }
1287
1288 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1289 u16 initiator, u16 reason_code)
1290 {
1291 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1292 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1293 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1294 struct sk_buff *skb;
1295 struct ieee80211_mgmt *mgmt;
1296 u16 params;
1297
1298 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1299 sizeof(mgmt->u.action.u.delba));
1300
1301 if (!skb) {
1302 printk(KERN_ERR "%s: failed to allocate buffer "
1303 "for delba frame\n", dev->name);
1304 return;
1305 }
1306
1307 skb_reserve(skb, local->hw.extra_tx_headroom);
1308 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1309 memset(mgmt, 0, 24);
1310 memcpy(mgmt->da, da, ETH_ALEN);
1311 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1312 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1313 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1314 else
1315 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1316 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1317 IEEE80211_STYPE_ACTION);
1318
1319 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1320
1321 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1322 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1323 params = (u16)(initiator << 11); /* bit 11 initiator */
1324 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1325
1326 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1327 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1328
1329 ieee80211_sta_tx(dev, skb, 0);
1330 }
1331
1332 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1333 u16 initiator, u16 reason)
1334 {
1335 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1336 struct ieee80211_hw *hw = &local->hw;
1337 struct sta_info *sta;
1338 int ret, i;
1339
1340 sta = sta_info_get(local, ra);
1341 if (!sta)
1342 return;
1343
1344 /* check if TID is in operational state */
1345 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1346 if (sta->ampdu_mlme.tid_rx[tid].state
1347 != HT_AGG_STATE_OPERATIONAL) {
1348 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1349 sta_info_put(sta);
1350 return;
1351 }
1352 sta->ampdu_mlme.tid_rx[tid].state =
1353 HT_AGG_STATE_REQ_STOP_BA_MSK |
1354 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1355 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1356
1357 /* stop HW Rx aggregation. ampdu_action existence
1358 * already verified in session init so we add the BUG_ON */
1359 BUG_ON(!local->ops->ampdu_action);
1360
1361 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1362 ra, tid, NULL);
1363 if (ret)
1364 printk(KERN_DEBUG "HW problem - can not stop rx "
1365 "aggergation for tid %d\n", tid);
1366
1367 /* shutdown timer has not expired */
1368 if (initiator != WLAN_BACK_TIMER)
1369 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1370 session_timer);
1371
1372 /* check if this is a self generated aggregation halt */
1373 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1374 ieee80211_send_delba(dev, ra, tid, 0, reason);
1375
1376 /* free the reordering buffer */
1377 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1378 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1379 /* release the reordered frames */
1380 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1381 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1382 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1383 }
1384 }
1385 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1386
1387 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1388 sta_info_put(sta);
1389 }
1390
1391
1392 static void ieee80211_sta_process_delba(struct net_device *dev,
1393 struct ieee80211_mgmt *mgmt, size_t len)
1394 {
1395 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1396 struct sta_info *sta;
1397 u16 tid, params;
1398 u16 initiator;
1399 DECLARE_MAC_BUF(mac);
1400
1401 sta = sta_info_get(local, mgmt->sa);
1402 if (!sta)
1403 return;
1404
1405 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1406 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1407 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1408
1409 #ifdef CONFIG_MAC80211_HT_DEBUG
1410 if (net_ratelimit())
1411 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1412 print_mac(mac, mgmt->sa),
1413 initiator ? "recipient" : "initiator", tid,
1414 mgmt->u.action.u.delba.reason_code);
1415 #endif /* CONFIG_MAC80211_HT_DEBUG */
1416
1417 if (initiator == WLAN_BACK_INITIATOR)
1418 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1419 WLAN_BACK_INITIATOR, 0);
1420 else { /* WLAN_BACK_RECIPIENT */
1421 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1422 sta->ampdu_mlme.tid_tx[tid].state =
1423 HT_AGG_STATE_OPERATIONAL;
1424 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1425 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1426 WLAN_BACK_RECIPIENT);
1427 }
1428 sta_info_put(sta);
1429 }
1430
1431 /*
1432 * After sending add Block Ack request we activated a timer until
1433 * add Block Ack response will arrive from the recipient.
1434 * If this timer expires sta_addba_resp_timer_expired will be executed.
1435 */
1436 void sta_addba_resp_timer_expired(unsigned long data)
1437 {
1438 /* not an elegant detour, but there is no choice as the timer passes
1439 * only one argument, and both sta_info and TID are needed, so init
1440 * flow in sta_info_add gives the TID as data, while the timer_to_id
1441 * array gives the sta through container_of */
1442 u16 tid = *(int *)data;
1443 struct sta_info *temp_sta = container_of((void *)data,
1444 struct sta_info, timer_to_tid[tid]);
1445
1446 struct ieee80211_local *local = temp_sta->local;
1447 struct ieee80211_hw *hw = &local->hw;
1448 struct sta_info *sta;
1449 u8 *state;
1450
1451 sta = sta_info_get(local, temp_sta->addr);
1452 if (!sta)
1453 return;
1454
1455 state = &sta->ampdu_mlme.tid_tx[tid].state;
1456 /* check if the TID waits for addBA response */
1457 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1458 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1459 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1460 *state = HT_AGG_STATE_IDLE;
1461 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1462 "expecting addBA response there", tid);
1463 goto timer_expired_exit;
1464 }
1465
1466 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1467
1468 /* go through the state check in stop_BA_session */
1469 *state = HT_AGG_STATE_OPERATIONAL;
1470 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1471 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1472 WLAN_BACK_INITIATOR);
1473
1474 timer_expired_exit:
1475 sta_info_put(sta);
1476 }
1477
1478 /*
1479 * After receiving Block Ack Request (BAR) we activated a
1480 * timer after each frame arrives from the originator.
1481 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1482 */
1483 void sta_rx_agg_session_timer_expired(unsigned long data)
1484 {
1485 /* not an elegant detour, but there is no choice as the timer passes
1486 * only one argument, and verious sta_info are needed here, so init
1487 * flow in sta_info_add gives the TID as data, while the timer_to_id
1488 * array gives the sta through container_of */
1489 u8 *ptid = (u8 *)data;
1490 u8 *timer_to_id = ptid - *ptid;
1491 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1492 timer_to_tid[0]);
1493
1494 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1495 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1496 WLAN_BACK_TIMER,
1497 WLAN_REASON_QSTA_TIMEOUT);
1498 }
1499
1500
1501 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1502 struct ieee80211_if_sta *ifsta,
1503 struct ieee80211_mgmt *mgmt,
1504 size_t len)
1505 {
1506 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1507 u16 auth_alg, auth_transaction, status_code;
1508 DECLARE_MAC_BUF(mac);
1509
1510 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1511 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1512 printk(KERN_DEBUG "%s: authentication frame received from "
1513 "%s, but not in authenticate state - ignored\n",
1514 dev->name, print_mac(mac, mgmt->sa));
1515 return;
1516 }
1517
1518 if (len < 24 + 6) {
1519 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1520 "received from %s - ignored\n",
1521 dev->name, len, print_mac(mac, mgmt->sa));
1522 return;
1523 }
1524
1525 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1526 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1527 printk(KERN_DEBUG "%s: authentication frame received from "
1528 "unknown AP (SA=%s BSSID=%s) - "
1529 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1530 print_mac(mac, mgmt->bssid));
1531 return;
1532 }
1533
1534 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1535 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1536 printk(KERN_DEBUG "%s: authentication frame received from "
1537 "unknown BSSID (SA=%s BSSID=%s) - "
1538 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1539 print_mac(mac, mgmt->bssid));
1540 return;
1541 }
1542
1543 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1544 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1545 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1546
1547 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1548 "transaction=%d status=%d)\n",
1549 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1550 auth_transaction, status_code);
1551
1552 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1553 /* IEEE 802.11 standard does not require authentication in IBSS
1554 * networks and most implementations do not seem to use it.
1555 * However, try to reply to authentication attempts if someone
1556 * has actually implemented this.
1557 * TODO: Could implement shared key authentication. */
1558 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1559 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1560 "frame (alg=%d transaction=%d)\n",
1561 dev->name, auth_alg, auth_transaction);
1562 return;
1563 }
1564 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1565 }
1566
1567 if (auth_alg != ifsta->auth_alg ||
1568 auth_transaction != ifsta->auth_transaction) {
1569 printk(KERN_DEBUG "%s: unexpected authentication frame "
1570 "(alg=%d transaction=%d)\n",
1571 dev->name, auth_alg, auth_transaction);
1572 return;
1573 }
1574
1575 if (status_code != WLAN_STATUS_SUCCESS) {
1576 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1577 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1578 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1579 u8 algs[3];
1580 const int num_algs = ARRAY_SIZE(algs);
1581 int i, pos;
1582 algs[0] = algs[1] = algs[2] = 0xff;
1583 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1584 algs[0] = WLAN_AUTH_OPEN;
1585 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1586 algs[1] = WLAN_AUTH_SHARED_KEY;
1587 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1588 algs[2] = WLAN_AUTH_LEAP;
1589 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1590 pos = 0;
1591 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1592 pos = 1;
1593 else
1594 pos = 2;
1595 for (i = 0; i < num_algs; i++) {
1596 pos++;
1597 if (pos >= num_algs)
1598 pos = 0;
1599 if (algs[pos] == ifsta->auth_alg ||
1600 algs[pos] == 0xff)
1601 continue;
1602 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1603 !ieee80211_sta_wep_configured(dev))
1604 continue;
1605 ifsta->auth_alg = algs[pos];
1606 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1607 "next try\n",
1608 dev->name, ifsta->auth_alg);
1609 break;
1610 }
1611 }
1612 return;
1613 }
1614
1615 switch (ifsta->auth_alg) {
1616 case WLAN_AUTH_OPEN:
1617 case WLAN_AUTH_LEAP:
1618 ieee80211_auth_completed(dev, ifsta);
1619 break;
1620 case WLAN_AUTH_SHARED_KEY:
1621 if (ifsta->auth_transaction == 4)
1622 ieee80211_auth_completed(dev, ifsta);
1623 else
1624 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1625 break;
1626 }
1627 }
1628
1629
1630 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1631 struct ieee80211_if_sta *ifsta,
1632 struct ieee80211_mgmt *mgmt,
1633 size_t len)
1634 {
1635 u16 reason_code;
1636 DECLARE_MAC_BUF(mac);
1637
1638 if (len < 24 + 2) {
1639 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1640 "received from %s - ignored\n",
1641 dev->name, len, print_mac(mac, mgmt->sa));
1642 return;
1643 }
1644
1645 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1646 printk(KERN_DEBUG "%s: deauthentication frame received from "
1647 "unknown AP (SA=%s BSSID=%s) - "
1648 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1649 print_mac(mac, mgmt->bssid));
1650 return;
1651 }
1652
1653 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1654
1655 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1656 " (reason=%d)\n",
1657 dev->name, print_mac(mac, mgmt->sa), reason_code);
1658
1659 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1660 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1661 }
1662
1663 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1664 ifsta->state == IEEE80211_ASSOCIATE ||
1665 ifsta->state == IEEE80211_ASSOCIATED) {
1666 ifsta->state = IEEE80211_AUTHENTICATE;
1667 mod_timer(&ifsta->timer, jiffies +
1668 IEEE80211_RETRY_AUTH_INTERVAL);
1669 }
1670
1671 ieee80211_set_disassoc(dev, ifsta, 1);
1672 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1673 }
1674
1675
1676 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1677 struct ieee80211_if_sta *ifsta,
1678 struct ieee80211_mgmt *mgmt,
1679 size_t len)
1680 {
1681 u16 reason_code;
1682 DECLARE_MAC_BUF(mac);
1683
1684 if (len < 24 + 2) {
1685 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1686 "received from %s - ignored\n",
1687 dev->name, len, print_mac(mac, mgmt->sa));
1688 return;
1689 }
1690
1691 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1692 printk(KERN_DEBUG "%s: disassociation frame received from "
1693 "unknown AP (SA=%s BSSID=%s) - "
1694 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1695 print_mac(mac, mgmt->bssid));
1696 return;
1697 }
1698
1699 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1700
1701 printk(KERN_DEBUG "%s: RX disassociation from %s"
1702 " (reason=%d)\n",
1703 dev->name, print_mac(mac, mgmt->sa), reason_code);
1704
1705 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1706 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1707
1708 if (ifsta->state == IEEE80211_ASSOCIATED) {
1709 ifsta->state = IEEE80211_ASSOCIATE;
1710 mod_timer(&ifsta->timer, jiffies +
1711 IEEE80211_RETRY_AUTH_INTERVAL);
1712 }
1713
1714 ieee80211_set_disassoc(dev, ifsta, 0);
1715 }
1716
1717
1718 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1719 struct ieee80211_if_sta *ifsta,
1720 struct ieee80211_mgmt *mgmt,
1721 size_t len,
1722 int reassoc)
1723 {
1724 struct ieee80211_local *local = sdata->local;
1725 struct net_device *dev = sdata->dev;
1726 struct ieee80211_supported_band *sband;
1727 struct sta_info *sta;
1728 u64 rates, basic_rates;
1729 u16 capab_info, status_code, aid;
1730 struct ieee802_11_elems elems;
1731 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1732 u8 *pos;
1733 int i, j;
1734 DECLARE_MAC_BUF(mac);
1735 bool have_higher_than_11mbit = false;
1736
1737 /* AssocResp and ReassocResp have identical structure, so process both
1738 * of them in this function. */
1739
1740 if (ifsta->state != IEEE80211_ASSOCIATE) {
1741 printk(KERN_DEBUG "%s: association frame received from "
1742 "%s, but not in associate state - ignored\n",
1743 dev->name, print_mac(mac, mgmt->sa));
1744 return;
1745 }
1746
1747 if (len < 24 + 6) {
1748 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1749 "received from %s - ignored\n",
1750 dev->name, len, print_mac(mac, mgmt->sa));
1751 return;
1752 }
1753
1754 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1755 printk(KERN_DEBUG "%s: association frame received from "
1756 "unknown AP (SA=%s BSSID=%s) - "
1757 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1758 print_mac(mac, mgmt->bssid));
1759 return;
1760 }
1761
1762 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1763 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1764 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1765
1766 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1767 "status=%d aid=%d)\n",
1768 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1769 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1770
1771 if (status_code != WLAN_STATUS_SUCCESS) {
1772 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1773 dev->name, status_code);
1774 /* if this was a reassociation, ensure we try a "full"
1775 * association next time. This works around some broken APs
1776 * which do not correctly reject reassociation requests. */
1777 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1778 return;
1779 }
1780
1781 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1782 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1783 "set\n", dev->name, aid);
1784 aid &= ~(BIT(15) | BIT(14));
1785
1786 pos = mgmt->u.assoc_resp.variable;
1787 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1788
1789 if (!elems.supp_rates) {
1790 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1791 dev->name);
1792 return;
1793 }
1794
1795 printk(KERN_DEBUG "%s: associated\n", dev->name);
1796 ifsta->aid = aid;
1797 ifsta->ap_capab = capab_info;
1798
1799 kfree(ifsta->assocresp_ies);
1800 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1801 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1802 if (ifsta->assocresp_ies)
1803 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1804
1805 /* Add STA entry for the AP */
1806 sta = sta_info_get(local, ifsta->bssid);
1807 if (!sta) {
1808 struct ieee80211_sta_bss *bss;
1809 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1810 if (!sta) {
1811 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1812 " AP\n", dev->name);
1813 return;
1814 }
1815 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1816 local->hw.conf.channel->center_freq,
1817 ifsta->ssid, ifsta->ssid_len);
1818 if (bss) {
1819 sta->last_rssi = bss->rssi;
1820 sta->last_signal = bss->signal;
1821 sta->last_noise = bss->noise;
1822 ieee80211_rx_bss_put(dev, bss);
1823 }
1824 }
1825
1826 sta->dev = dev;
1827 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1828 WLAN_STA_AUTHORIZED;
1829
1830 rates = 0;
1831 basic_rates = 0;
1832 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1833
1834 for (i = 0; i < elems.supp_rates_len; i++) {
1835 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1836
1837 if (rate > 110)
1838 have_higher_than_11mbit = true;
1839
1840 for (j = 0; j < sband->n_bitrates; j++) {
1841 if (sband->bitrates[j].bitrate == rate)
1842 rates |= BIT(j);
1843 if (elems.supp_rates[i] & 0x80)
1844 basic_rates |= BIT(j);
1845 }
1846 }
1847
1848 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1849 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1850
1851 if (rate > 110)
1852 have_higher_than_11mbit = true;
1853
1854 for (j = 0; j < sband->n_bitrates; j++) {
1855 if (sband->bitrates[j].bitrate == rate)
1856 rates |= BIT(j);
1857 if (elems.ext_supp_rates[i] & 0x80)
1858 basic_rates |= BIT(j);
1859 }
1860 }
1861
1862 sta->supp_rates[local->hw.conf.channel->band] = rates;
1863 sdata->basic_rates = basic_rates;
1864
1865 /* cf. IEEE 802.11 9.2.12 */
1866 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1867 have_higher_than_11mbit)
1868 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1869 else
1870 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1871
1872 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1873 local->ops->conf_ht) {
1874 struct ieee80211_ht_bss_info bss_info;
1875
1876 ieee80211_ht_cap_ie_to_ht_info(
1877 (struct ieee80211_ht_cap *)
1878 elems.ht_cap_elem, &sta->ht_info);
1879 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1880 (struct ieee80211_ht_addt_info *)
1881 elems.ht_info_elem, &bss_info);
1882 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1883 }
1884
1885 rate_control_rate_init(sta, local);
1886
1887 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1888 sta->flags |= WLAN_STA_WME;
1889 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1890 elems.wmm_param_len);
1891 }
1892
1893 /* set AID, ieee80211_set_associated() will tell the driver */
1894 bss_conf->aid = aid;
1895 ieee80211_set_associated(dev, ifsta, 1);
1896
1897 sta_info_put(sta);
1898
1899 ieee80211_associated(dev, ifsta);
1900 }
1901
1902
1903 /* Caller must hold local->sta_bss_lock */
1904 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1905 struct ieee80211_sta_bss *bss)
1906 {
1907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1908 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1909 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1910 }
1911
1912
1913 /* Caller must hold local->sta_bss_lock */
1914 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1915 struct ieee80211_sta_bss *bss)
1916 {
1917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1918 struct ieee80211_sta_bss *b, *prev = NULL;
1919 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1920 while (b) {
1921 if (b == bss) {
1922 if (!prev)
1923 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1924 bss->hnext;
1925 else
1926 prev->hnext = bss->hnext;
1927 break;
1928 }
1929 prev = b;
1930 b = b->hnext;
1931 }
1932 }
1933
1934
1935 static struct ieee80211_sta_bss *
1936 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1937 u8 *ssid, u8 ssid_len)
1938 {
1939 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1940 struct ieee80211_sta_bss *bss;
1941
1942 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1943 if (!bss)
1944 return NULL;
1945 atomic_inc(&bss->users);
1946 atomic_inc(&bss->users);
1947 memcpy(bss->bssid, bssid, ETH_ALEN);
1948 bss->freq = freq;
1949 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1950 memcpy(bss->ssid, ssid, ssid_len);
1951 bss->ssid_len = ssid_len;
1952 }
1953
1954 spin_lock_bh(&local->sta_bss_lock);
1955 /* TODO: order by RSSI? */
1956 list_add_tail(&bss->list, &local->sta_bss_list);
1957 __ieee80211_rx_bss_hash_add(dev, bss);
1958 spin_unlock_bh(&local->sta_bss_lock);
1959 return bss;
1960 }
1961
1962
1963 static struct ieee80211_sta_bss *
1964 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1965 u8 *ssid, u8 ssid_len)
1966 {
1967 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1968 struct ieee80211_sta_bss *bss;
1969
1970 spin_lock_bh(&local->sta_bss_lock);
1971 bss = local->sta_bss_hash[STA_HASH(bssid)];
1972 while (bss) {
1973 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1974 bss->freq == freq &&
1975 bss->ssid_len == ssid_len &&
1976 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1977 atomic_inc(&bss->users);
1978 break;
1979 }
1980 bss = bss->hnext;
1981 }
1982 spin_unlock_bh(&local->sta_bss_lock);
1983 return bss;
1984 }
1985
1986
1987 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1988 {
1989 kfree(bss->wpa_ie);
1990 kfree(bss->rsn_ie);
1991 kfree(bss->wmm_ie);
1992 kfree(bss->ht_ie);
1993 kfree(bss);
1994 }
1995
1996
1997 static void ieee80211_rx_bss_put(struct net_device *dev,
1998 struct ieee80211_sta_bss *bss)
1999 {
2000 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2001 if (!atomic_dec_and_test(&bss->users))
2002 return;
2003
2004 spin_lock_bh(&local->sta_bss_lock);
2005 __ieee80211_rx_bss_hash_del(dev, bss);
2006 list_del(&bss->list);
2007 spin_unlock_bh(&local->sta_bss_lock);
2008 ieee80211_rx_bss_free(bss);
2009 }
2010
2011
2012 void ieee80211_rx_bss_list_init(struct net_device *dev)
2013 {
2014 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2015 spin_lock_init(&local->sta_bss_lock);
2016 INIT_LIST_HEAD(&local->sta_bss_list);
2017 }
2018
2019
2020 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2021 {
2022 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2023 struct ieee80211_sta_bss *bss, *tmp;
2024
2025 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2026 ieee80211_rx_bss_put(dev, bss);
2027 }
2028
2029
2030 static int ieee80211_sta_join_ibss(struct net_device *dev,
2031 struct ieee80211_if_sta *ifsta,
2032 struct ieee80211_sta_bss *bss)
2033 {
2034 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2035 int res, rates, i, j;
2036 struct sk_buff *skb;
2037 struct ieee80211_mgmt *mgmt;
2038 struct ieee80211_tx_control control;
2039 struct rate_selection ratesel;
2040 u8 *pos;
2041 struct ieee80211_sub_if_data *sdata;
2042 struct ieee80211_supported_band *sband;
2043
2044 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2045
2046 /* Remove possible STA entries from other IBSS networks. */
2047 sta_info_flush(local, NULL);
2048
2049 if (local->ops->reset_tsf) {
2050 /* Reset own TSF to allow time synchronization work. */
2051 local->ops->reset_tsf(local_to_hw(local));
2052 }
2053 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2054 res = ieee80211_if_config(dev);
2055 if (res)
2056 return res;
2057
2058 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2059
2060 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2061 sdata->drop_unencrypted = bss->capability &
2062 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2063
2064 res = ieee80211_set_freq(local, bss->freq);
2065
2066 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2067 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2068 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2069 return -1;
2070 }
2071
2072 /* Set beacon template */
2073 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2074 do {
2075 if (!skb)
2076 break;
2077
2078 skb_reserve(skb, local->hw.extra_tx_headroom);
2079
2080 mgmt = (struct ieee80211_mgmt *)
2081 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2082 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2083 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2084 IEEE80211_STYPE_BEACON);
2085 memset(mgmt->da, 0xff, ETH_ALEN);
2086 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2087 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2088 mgmt->u.beacon.beacon_int =
2089 cpu_to_le16(local->hw.conf.beacon_int);
2090 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2091
2092 pos = skb_put(skb, 2 + ifsta->ssid_len);
2093 *pos++ = WLAN_EID_SSID;
2094 *pos++ = ifsta->ssid_len;
2095 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2096
2097 rates = bss->supp_rates_len;
2098 if (rates > 8)
2099 rates = 8;
2100 pos = skb_put(skb, 2 + rates);
2101 *pos++ = WLAN_EID_SUPP_RATES;
2102 *pos++ = rates;
2103 memcpy(pos, bss->supp_rates, rates);
2104
2105 if (bss->band == IEEE80211_BAND_2GHZ) {
2106 pos = skb_put(skb, 2 + 1);
2107 *pos++ = WLAN_EID_DS_PARAMS;
2108 *pos++ = 1;
2109 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2110 }
2111
2112 pos = skb_put(skb, 2 + 2);
2113 *pos++ = WLAN_EID_IBSS_PARAMS;
2114 *pos++ = 2;
2115 /* FIX: set ATIM window based on scan results */
2116 *pos++ = 0;
2117 *pos++ = 0;
2118
2119 if (bss->supp_rates_len > 8) {
2120 rates = bss->supp_rates_len - 8;
2121 pos = skb_put(skb, 2 + rates);
2122 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2123 *pos++ = rates;
2124 memcpy(pos, &bss->supp_rates[8], rates);
2125 }
2126
2127 memset(&control, 0, sizeof(control));
2128 rate_control_get_rate(dev, sband, skb, &ratesel);
2129 if (!ratesel.rate) {
2130 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2131 "for IBSS beacon\n", dev->name);
2132 break;
2133 }
2134 control.vif = &sdata->vif;
2135 control.tx_rate = ratesel.rate;
2136 if (sdata->bss_conf.use_short_preamble &&
2137 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2138 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2139 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2140 control.flags |= IEEE80211_TXCTL_NO_ACK;
2141 control.retry_limit = 1;
2142
2143 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2144 if (ifsta->probe_resp) {
2145 mgmt = (struct ieee80211_mgmt *)
2146 ifsta->probe_resp->data;
2147 mgmt->frame_control =
2148 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2149 IEEE80211_STYPE_PROBE_RESP);
2150 } else {
2151 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2152 "template for IBSS\n", dev->name);
2153 }
2154
2155 if (local->ops->beacon_update &&
2156 local->ops->beacon_update(local_to_hw(local),
2157 skb, &control) == 0) {
2158 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2159 "template\n", dev->name);
2160 skb = NULL;
2161 }
2162
2163 rates = 0;
2164 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2165 for (i = 0; i < bss->supp_rates_len; i++) {
2166 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2167 for (j = 0; j < sband->n_bitrates; j++)
2168 if (sband->bitrates[j].bitrate == bitrate)
2169 rates |= BIT(j);
2170 }
2171 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2172 } while (0);
2173
2174 if (skb) {
2175 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2176 "template\n", dev->name);
2177 dev_kfree_skb(skb);
2178 }
2179
2180 ifsta->state = IEEE80211_IBSS_JOINED;
2181 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2182
2183 ieee80211_rx_bss_put(dev, bss);
2184
2185 return res;
2186 }
2187
2188
2189 static void ieee80211_rx_bss_info(struct net_device *dev,
2190 struct ieee80211_mgmt *mgmt,
2191 size_t len,
2192 struct ieee80211_rx_status *rx_status,
2193 int beacon)
2194 {
2195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2196 struct ieee802_11_elems elems;
2197 size_t baselen;
2198 int freq, clen;
2199 struct ieee80211_sta_bss *bss;
2200 struct sta_info *sta;
2201 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2202 u64 beacon_timestamp, rx_timestamp;
2203 DECLARE_MAC_BUF(mac);
2204 DECLARE_MAC_BUF(mac2);
2205
2206 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2207 return; /* ignore ProbeResp to foreign address */
2208
2209 #if 0
2210 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2211 dev->name, beacon ? "Beacon" : "Probe Response",
2212 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2213 #endif
2214
2215 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2216 if (baselen > len)
2217 return;
2218
2219 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2220 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2221
2222 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2223 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2224 (sta = sta_info_get(local, mgmt->sa))) {
2225 struct ieee80211_supported_band *sband;
2226 struct ieee80211_rate *bitrates;
2227 size_t num_rates;
2228 u64 supp_rates, prev_rates;
2229 int i, j;
2230
2231 sband = local->hw.wiphy->bands[rx_status->band];
2232
2233 if (!sband) {
2234 WARN_ON(1);
2235 sband = local->hw.wiphy->bands[
2236 local->hw.conf.channel->band];
2237 }
2238
2239 bitrates = sband->bitrates;
2240 num_rates = sband->n_bitrates;
2241
2242 supp_rates = 0;
2243 for (i = 0; i < elems.supp_rates_len +
2244 elems.ext_supp_rates_len; i++) {
2245 u8 rate = 0;
2246 int own_rate;
2247 if (i < elems.supp_rates_len)
2248 rate = elems.supp_rates[i];
2249 else if (elems.ext_supp_rates)
2250 rate = elems.ext_supp_rates
2251 [i - elems.supp_rates_len];
2252 own_rate = 5 * (rate & 0x7f);
2253 for (j = 0; j < num_rates; j++)
2254 if (bitrates[j].bitrate == own_rate)
2255 supp_rates |= BIT(j);
2256 }
2257
2258 prev_rates = sta->supp_rates[rx_status->band];
2259 sta->supp_rates[rx_status->band] &= supp_rates;
2260 if (sta->supp_rates[rx_status->band] == 0) {
2261 /* No matching rates - this should not really happen.
2262 * Make sure that at least one rate is marked
2263 * supported to avoid issues with TX rate ctrl. */
2264 sta->supp_rates[rx_status->band] =
2265 sdata->u.sta.supp_rates_bits[rx_status->band];
2266 }
2267 if (sta->supp_rates[rx_status->band] != prev_rates) {
2268 printk(KERN_DEBUG "%s: updated supp_rates set for "
2269 "%s based on beacon info (0x%llx & 0x%llx -> "
2270 "0x%llx)\n",
2271 dev->name, print_mac(mac, sta->addr),
2272 (unsigned long long) prev_rates,
2273 (unsigned long long) supp_rates,
2274 (unsigned long long) sta->supp_rates[rx_status->band]);
2275 }
2276 sta_info_put(sta);
2277 }
2278
2279 if (!elems.ssid)
2280 return;
2281
2282 if (elems.ds_params && elems.ds_params_len == 1)
2283 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2284 else
2285 freq = rx_status->freq;
2286
2287 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2288 elems.ssid, elems.ssid_len);
2289 if (!bss) {
2290 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2291 elems.ssid, elems.ssid_len);
2292 if (!bss)
2293 return;
2294 } else {
2295 #if 0
2296 /* TODO: order by RSSI? */
2297 spin_lock_bh(&local->sta_bss_lock);
2298 list_move_tail(&bss->list, &local->sta_bss_list);
2299 spin_unlock_bh(&local->sta_bss_lock);
2300 #endif
2301 }
2302
2303 bss->band = rx_status->band;
2304
2305 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2306 bss->probe_resp && beacon) {
2307 /* STA mode:
2308 * Do not allow beacon to override data from Probe Response. */
2309 ieee80211_rx_bss_put(dev, bss);
2310 return;
2311 }
2312
2313 /* save the ERP value so that it is available at association time */
2314 if (elems.erp_info && elems.erp_info_len >= 1) {
2315 bss->erp_value = elems.erp_info[0];
2316 bss->has_erp_value = 1;
2317 }
2318
2319 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2320 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2321
2322 bss->supp_rates_len = 0;
2323 if (elems.supp_rates) {
2324 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2325 if (clen > elems.supp_rates_len)
2326 clen = elems.supp_rates_len;
2327 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2328 clen);
2329 bss->supp_rates_len += clen;
2330 }
2331 if (elems.ext_supp_rates) {
2332 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2333 if (clen > elems.ext_supp_rates_len)
2334 clen = elems.ext_supp_rates_len;
2335 memcpy(&bss->supp_rates[bss->supp_rates_len],
2336 elems.ext_supp_rates, clen);
2337 bss->supp_rates_len += clen;
2338 }
2339
2340 if (elems.wpa &&
2341 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2342 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2343 kfree(bss->wpa_ie);
2344 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2345 if (bss->wpa_ie) {
2346 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2347 bss->wpa_ie_len = elems.wpa_len + 2;
2348 } else
2349 bss->wpa_ie_len = 0;
2350 } else if (!elems.wpa && bss->wpa_ie) {
2351 kfree(bss->wpa_ie);
2352 bss->wpa_ie = NULL;
2353 bss->wpa_ie_len = 0;
2354 }
2355
2356 if (elems.rsn &&
2357 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2358 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2359 kfree(bss->rsn_ie);
2360 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2361 if (bss->rsn_ie) {
2362 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2363 bss->rsn_ie_len = elems.rsn_len + 2;
2364 } else
2365 bss->rsn_ie_len = 0;
2366 } else if (!elems.rsn && bss->rsn_ie) {
2367 kfree(bss->rsn_ie);
2368 bss->rsn_ie = NULL;
2369 bss->rsn_ie_len = 0;
2370 }
2371
2372 if (elems.wmm_param &&
2373 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2374 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2375 kfree(bss->wmm_ie);
2376 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2377 if (bss->wmm_ie) {
2378 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2379 elems.wmm_param_len + 2);
2380 bss->wmm_ie_len = elems.wmm_param_len + 2;
2381 } else
2382 bss->wmm_ie_len = 0;
2383 } else if (!elems.wmm_param && bss->wmm_ie) {
2384 kfree(bss->wmm_ie);
2385 bss->wmm_ie = NULL;
2386 bss->wmm_ie_len = 0;
2387 }
2388 if (elems.ht_cap_elem &&
2389 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2390 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2391 kfree(bss->ht_ie);
2392 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2393 if (bss->ht_ie) {
2394 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2395 elems.ht_cap_elem_len + 2);
2396 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2397 } else
2398 bss->ht_ie_len = 0;
2399 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2400 kfree(bss->ht_ie);
2401 bss->ht_ie = NULL;
2402 bss->ht_ie_len = 0;
2403 }
2404
2405 bss->timestamp = beacon_timestamp;
2406 bss->last_update = jiffies;
2407 bss->rssi = rx_status->ssi;
2408 bss->signal = rx_status->signal;
2409 bss->noise = rx_status->noise;
2410 if (!beacon)
2411 bss->probe_resp++;
2412
2413 /* check if we need to merge IBSS */
2414 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2415 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2416 mgmt->u.beacon.capab_info & WLAN_CAPABILITY_IBSS &&
2417 bss->freq == local->oper_channel->center_freq &&
2418 elems.ssid_len == sdata->u.sta.ssid_len &&
2419 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2420 if (rx_status->flag & RX_FLAG_TSFT) {
2421 /* in order for correct IBSS merging we need mactime
2422 *
2423 * since mactime is defined as the time the first data
2424 * symbol of the frame hits the PHY, and the timestamp
2425 * of the beacon is defined as "the time that the data
2426 * symbol containing the first bit of the timestamp is
2427 * transmitted to the PHY plus the transmitting STA’s
2428 * delays through its local PHY from the MAC-PHY
2429 * interface to its interface with the WM"
2430 * (802.11 11.1.2) - equals the time this bit arrives at
2431 * the receiver - we have to take into account the
2432 * offset between the two.
2433 * e.g: at 1 MBit that means mactime is 192 usec earlier
2434 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2435 */
2436 int rate = local->hw.wiphy->bands[rx_status->band]->
2437 bitrates[rx_status->rate_idx].bitrate;
2438 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2439 } else if (local && local->ops && local->ops->get_tsf)
2440 /* second best option: get current TSF */
2441 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2442 else
2443 /* can't merge without knowing the TSF */
2444 rx_timestamp = -1LLU;
2445 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2446 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2447 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2448 print_mac(mac, mgmt->sa),
2449 print_mac(mac2, mgmt->bssid),
2450 (unsigned long long)rx_timestamp,
2451 (unsigned long long)beacon_timestamp,
2452 (unsigned long long)(rx_timestamp - beacon_timestamp),
2453 jiffies);
2454 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2455 if (beacon_timestamp > rx_timestamp) {
2456 if (CONFIG_MAC80211_IBSS_DEBUG || net_ratelimit())
2457 printk(KERN_DEBUG "%s: beacon TSF higher than "
2458 "local TSF - IBSS merge with BSSID %s\n",
2459 dev->name, print_mac(mac, mgmt->bssid));
2460 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2461 ieee80211_ibss_add_sta(dev, NULL,
2462 mgmt->bssid, mgmt->sa);
2463 }
2464 }
2465
2466 ieee80211_rx_bss_put(dev, bss);
2467 }
2468
2469
2470 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2471 struct ieee80211_mgmt *mgmt,
2472 size_t len,
2473 struct ieee80211_rx_status *rx_status)
2474 {
2475 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2476 }
2477
2478
2479 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2480 struct ieee80211_mgmt *mgmt,
2481 size_t len,
2482 struct ieee80211_rx_status *rx_status)
2483 {
2484 struct ieee80211_sub_if_data *sdata;
2485 struct ieee80211_if_sta *ifsta;
2486 size_t baselen;
2487 struct ieee802_11_elems elems;
2488 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2489 struct ieee80211_conf *conf = &local->hw.conf;
2490 u32 changed = 0;
2491
2492 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2493
2494 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2495 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2496 return;
2497 ifsta = &sdata->u.sta;
2498
2499 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2500 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2501 return;
2502
2503 /* Process beacon from the current BSS */
2504 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2505 if (baselen > len)
2506 return;
2507
2508 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2509
2510 if (elems.erp_info && elems.erp_info_len >= 1)
2511 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2512
2513 if (elems.ht_cap_elem && elems.ht_info_elem &&
2514 elems.wmm_param && local->ops->conf_ht &&
2515 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2516 struct ieee80211_ht_bss_info bss_info;
2517
2518 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2519 (struct ieee80211_ht_addt_info *)
2520 elems.ht_info_elem, &bss_info);
2521 /* check if AP changed bss inforamation */
2522 if ((conf->ht_bss_conf.primary_channel !=
2523 bss_info.primary_channel) ||
2524 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2525 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2526 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2527 &bss_info);
2528 }
2529
2530 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2531 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2532 elems.wmm_param_len);
2533 }
2534
2535 ieee80211_bss_info_change_notify(sdata, changed);
2536 }
2537
2538
2539 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2540 struct ieee80211_if_sta *ifsta,
2541 struct ieee80211_mgmt *mgmt,
2542 size_t len,
2543 struct ieee80211_rx_status *rx_status)
2544 {
2545 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2546 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2547 int tx_last_beacon;
2548 struct sk_buff *skb;
2549 struct ieee80211_mgmt *resp;
2550 u8 *pos, *end;
2551 DECLARE_MAC_BUF(mac);
2552 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2553 DECLARE_MAC_BUF(mac2);
2554 DECLARE_MAC_BUF(mac3);
2555 #endif
2556
2557 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2558 ifsta->state != IEEE80211_IBSS_JOINED ||
2559 len < 24 + 2 || !ifsta->probe_resp)
2560 return;
2561
2562 if (local->ops->tx_last_beacon)
2563 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2564 else
2565 tx_last_beacon = 1;
2566
2567 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2568 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2569 "%s (tx_last_beacon=%d)\n",
2570 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2571 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2572 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2573
2574 if (!tx_last_beacon)
2575 return;
2576
2577 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2578 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2579 return;
2580
2581 end = ((u8 *) mgmt) + len;
2582 pos = mgmt->u.probe_req.variable;
2583 if (pos[0] != WLAN_EID_SSID ||
2584 pos + 2 + pos[1] > end) {
2585 if (net_ratelimit()) {
2586 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2587 "from %s\n",
2588 dev->name, print_mac(mac, mgmt->sa));
2589 }
2590 return;
2591 }
2592 if (pos[1] != 0 &&
2593 (pos[1] != ifsta->ssid_len ||
2594 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2595 /* Ignore ProbeReq for foreign SSID */
2596 return;
2597 }
2598
2599 /* Reply with ProbeResp */
2600 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2601 if (!skb)
2602 return;
2603
2604 resp = (struct ieee80211_mgmt *) skb->data;
2605 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2606 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2607 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2608 dev->name, print_mac(mac, resp->da));
2609 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2610 ieee80211_sta_tx(dev, skb, 0);
2611 }
2612
2613 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2614 struct ieee80211_if_sta *ifsta,
2615 struct ieee80211_mgmt *mgmt,
2616 size_t len)
2617 {
2618 if (len < IEEE80211_MIN_ACTION_SIZE)
2619 return;
2620
2621 switch (mgmt->u.action.category) {
2622 case WLAN_CATEGORY_BACK:
2623 switch (mgmt->u.action.u.addba_req.action_code) {
2624 case WLAN_ACTION_ADDBA_REQ:
2625 if (len < (IEEE80211_MIN_ACTION_SIZE +
2626 sizeof(mgmt->u.action.u.addba_req)))
2627 break;
2628 ieee80211_sta_process_addba_request(dev, mgmt, len);
2629 break;
2630 case WLAN_ACTION_ADDBA_RESP:
2631 if (len < (IEEE80211_MIN_ACTION_SIZE +
2632 sizeof(mgmt->u.action.u.addba_resp)))
2633 break;
2634 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2635 break;
2636 case WLAN_ACTION_DELBA:
2637 if (len < (IEEE80211_MIN_ACTION_SIZE +
2638 sizeof(mgmt->u.action.u.delba)))
2639 break;
2640 ieee80211_sta_process_delba(dev, mgmt, len);
2641 break;
2642 default:
2643 if (net_ratelimit())
2644 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2645 dev->name);
2646 break;
2647 }
2648 break;
2649 default:
2650 break;
2651 }
2652 }
2653
2654 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2655 struct ieee80211_rx_status *rx_status)
2656 {
2657 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2658 struct ieee80211_sub_if_data *sdata;
2659 struct ieee80211_if_sta *ifsta;
2660 struct ieee80211_mgmt *mgmt;
2661 u16 fc;
2662
2663 if (skb->len < 24)
2664 goto fail;
2665
2666 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2667 ifsta = &sdata->u.sta;
2668
2669 mgmt = (struct ieee80211_mgmt *) skb->data;
2670 fc = le16_to_cpu(mgmt->frame_control);
2671
2672 switch (fc & IEEE80211_FCTL_STYPE) {
2673 case IEEE80211_STYPE_PROBE_REQ:
2674 case IEEE80211_STYPE_PROBE_RESP:
2675 case IEEE80211_STYPE_BEACON:
2676 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2677 case IEEE80211_STYPE_AUTH:
2678 case IEEE80211_STYPE_ASSOC_RESP:
2679 case IEEE80211_STYPE_REASSOC_RESP:
2680 case IEEE80211_STYPE_DEAUTH:
2681 case IEEE80211_STYPE_DISASSOC:
2682 case IEEE80211_STYPE_ACTION:
2683 skb_queue_tail(&ifsta->skb_queue, skb);
2684 queue_work(local->hw.workqueue, &ifsta->work);
2685 return;
2686 default:
2687 printk(KERN_DEBUG "%s: received unknown management frame - "
2688 "stype=%d\n", dev->name,
2689 (fc & IEEE80211_FCTL_STYPE) >> 4);
2690 break;
2691 }
2692
2693 fail:
2694 kfree_skb(skb);
2695 }
2696
2697
2698 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2699 struct sk_buff *skb)
2700 {
2701 struct ieee80211_rx_status *rx_status;
2702 struct ieee80211_sub_if_data *sdata;
2703 struct ieee80211_if_sta *ifsta;
2704 struct ieee80211_mgmt *mgmt;
2705 u16 fc;
2706
2707 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2708 ifsta = &sdata->u.sta;
2709
2710 rx_status = (struct ieee80211_rx_status *) skb->cb;
2711 mgmt = (struct ieee80211_mgmt *) skb->data;
2712 fc = le16_to_cpu(mgmt->frame_control);
2713
2714 switch (fc & IEEE80211_FCTL_STYPE) {
2715 case IEEE80211_STYPE_PROBE_REQ:
2716 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2717 rx_status);
2718 break;
2719 case IEEE80211_STYPE_PROBE_RESP:
2720 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2721 break;
2722 case IEEE80211_STYPE_BEACON:
2723 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2724 break;
2725 case IEEE80211_STYPE_AUTH:
2726 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2727 break;
2728 case IEEE80211_STYPE_ASSOC_RESP:
2729 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2730 break;
2731 case IEEE80211_STYPE_REASSOC_RESP:
2732 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2733 break;
2734 case IEEE80211_STYPE_DEAUTH:
2735 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2736 break;
2737 case IEEE80211_STYPE_DISASSOC:
2738 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2739 break;
2740 case IEEE80211_STYPE_ACTION:
2741 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2742 break;
2743 }
2744
2745 kfree_skb(skb);
2746 }
2747
2748
2749 ieee80211_rx_result
2750 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2751 struct ieee80211_rx_status *rx_status)
2752 {
2753 struct ieee80211_mgmt *mgmt;
2754 u16 fc;
2755
2756 if (skb->len < 2)
2757 return RX_DROP_UNUSABLE;
2758
2759 mgmt = (struct ieee80211_mgmt *) skb->data;
2760 fc = le16_to_cpu(mgmt->frame_control);
2761
2762 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2763 return RX_CONTINUE;
2764
2765 if (skb->len < 24)
2766 return RX_DROP_MONITOR;
2767
2768 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2769 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2770 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2771 skb->len, rx_status);
2772 dev_kfree_skb(skb);
2773 return RX_QUEUED;
2774 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2775 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2776 rx_status);
2777 dev_kfree_skb(skb);
2778 return RX_QUEUED;
2779 }
2780 }
2781 return RX_CONTINUE;
2782 }
2783
2784
2785 static int ieee80211_sta_active_ibss(struct net_device *dev)
2786 {
2787 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2788 int active = 0;
2789 struct sta_info *sta;
2790
2791 read_lock_bh(&local->sta_lock);
2792 list_for_each_entry(sta, &local->sta_list, list) {
2793 if (sta->dev == dev &&
2794 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2795 jiffies)) {
2796 active++;
2797 break;
2798 }
2799 }
2800 read_unlock_bh(&local->sta_lock);
2801
2802 return active;
2803 }
2804
2805
2806 static void ieee80211_sta_expire(struct net_device *dev)
2807 {
2808 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2809 struct sta_info *sta, *tmp;
2810 LIST_HEAD(tmp_list);
2811 DECLARE_MAC_BUF(mac);
2812
2813 write_lock_bh(&local->sta_lock);
2814 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2815 if (time_after(jiffies, sta->last_rx +
2816 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2817 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2818 dev->name, print_mac(mac, sta->addr));
2819 __sta_info_get(sta);
2820 sta_info_remove(sta);
2821 list_add(&sta->list, &tmp_list);
2822 }
2823 write_unlock_bh(&local->sta_lock);
2824
2825 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2826 sta_info_free(sta);
2827 sta_info_put(sta);
2828 }
2829 }
2830
2831
2832 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2833 struct ieee80211_if_sta *ifsta)
2834 {
2835 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2836
2837 ieee80211_sta_expire(dev);
2838 if (ieee80211_sta_active_ibss(dev))
2839 return;
2840
2841 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2842 "IBSS networks with same SSID (merge)\n", dev->name);
2843 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2844 }
2845
2846
2847 void ieee80211_sta_timer(unsigned long data)
2848 {
2849 struct ieee80211_sub_if_data *sdata =
2850 (struct ieee80211_sub_if_data *) data;
2851 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2852 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2853
2854 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2855 queue_work(local->hw.workqueue, &ifsta->work);
2856 }
2857
2858
2859 void ieee80211_sta_work(struct work_struct *work)
2860 {
2861 struct ieee80211_sub_if_data *sdata =
2862 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2863 struct net_device *dev = sdata->dev;
2864 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2865 struct ieee80211_if_sta *ifsta;
2866 struct sk_buff *skb;
2867
2868 if (!netif_running(dev))
2869 return;
2870
2871 if (local->sta_sw_scanning || local->sta_hw_scanning)
2872 return;
2873
2874 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2875 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2876 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2877 "(type=%d)\n", dev->name, sdata->vif.type);
2878 return;
2879 }
2880 ifsta = &sdata->u.sta;
2881
2882 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2883 ieee80211_sta_rx_queued_mgmt(dev, skb);
2884
2885 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2886 ifsta->state != IEEE80211_ASSOCIATE &&
2887 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2888 if (ifsta->scan_ssid_len)
2889 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2890 else
2891 ieee80211_sta_start_scan(dev, NULL, 0);
2892 return;
2893 }
2894
2895 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2896 if (ieee80211_sta_config_auth(dev, ifsta))
2897 return;
2898 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2899 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2900 return;
2901
2902 switch (ifsta->state) {
2903 case IEEE80211_DISABLED:
2904 break;
2905 case IEEE80211_AUTHENTICATE:
2906 ieee80211_authenticate(dev, ifsta);
2907 break;
2908 case IEEE80211_ASSOCIATE:
2909 ieee80211_associate(dev, ifsta);
2910 break;
2911 case IEEE80211_ASSOCIATED:
2912 ieee80211_associated(dev, ifsta);
2913 break;
2914 case IEEE80211_IBSS_SEARCH:
2915 ieee80211_sta_find_ibss(dev, ifsta);
2916 break;
2917 case IEEE80211_IBSS_JOINED:
2918 ieee80211_sta_merge_ibss(dev, ifsta);
2919 break;
2920 default:
2921 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2922 ifsta->state);
2923 break;
2924 }
2925
2926 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2927 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2928 "mixed-cell disabled - disassociate\n", dev->name);
2929
2930 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2931 ieee80211_set_disassoc(dev, ifsta, 0);
2932 }
2933 }
2934
2935
2936 static void ieee80211_sta_reset_auth(struct net_device *dev,
2937 struct ieee80211_if_sta *ifsta)
2938 {
2939 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2940
2941 if (local->ops->reset_tsf) {
2942 /* Reset own TSF to allow time synchronization work. */
2943 local->ops->reset_tsf(local_to_hw(local));
2944 }
2945
2946 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2947
2948
2949 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2950 ifsta->auth_alg = WLAN_AUTH_OPEN;
2951 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2952 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2953 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2954 ifsta->auth_alg = WLAN_AUTH_LEAP;
2955 else
2956 ifsta->auth_alg = WLAN_AUTH_OPEN;
2957 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2958 ifsta->auth_alg);
2959 ifsta->auth_transaction = -1;
2960 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2961 ifsta->auth_tries = ifsta->assoc_tries = 0;
2962 netif_carrier_off(dev);
2963 }
2964
2965
2966 void ieee80211_sta_req_auth(struct net_device *dev,
2967 struct ieee80211_if_sta *ifsta)
2968 {
2969 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2970 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2971
2972 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2973 return;
2974
2975 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2976 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2977 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2978 IEEE80211_STA_AUTO_SSID_SEL))) {
2979 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2980 queue_work(local->hw.workqueue, &ifsta->work);
2981 }
2982 }
2983
2984 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2985 const char *ssid, int ssid_len)
2986 {
2987 int tmp, hidden_ssid;
2988
2989 if (ssid_len == ifsta->ssid_len &&
2990 !memcmp(ifsta->ssid, ssid, ssid_len))
2991 return 1;
2992
2993 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2994 return 0;
2995
2996 hidden_ssid = 1;
2997 tmp = ssid_len;
2998 while (tmp--) {
2999 if (ssid[tmp] != '\0') {
3000 hidden_ssid = 0;
3001 break;
3002 }
3003 }
3004
3005 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3006 return 1;
3007
3008 if (ssid_len == 1 && ssid[0] == ' ')
3009 return 1;
3010
3011 return 0;
3012 }
3013
3014 static int ieee80211_sta_config_auth(struct net_device *dev,
3015 struct ieee80211_if_sta *ifsta)
3016 {
3017 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3018 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3019 struct ieee80211_sta_bss *bss, *selected = NULL;
3020 int top_rssi = 0, freq;
3021
3022 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3023 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3024 ifsta->state = IEEE80211_AUTHENTICATE;
3025 ieee80211_sta_reset_auth(dev, ifsta);
3026 return 0;
3027 }
3028
3029 spin_lock_bh(&local->sta_bss_lock);
3030 freq = local->oper_channel->center_freq;
3031 list_for_each_entry(bss, &local->sta_bss_list, list) {
3032 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3033 continue;
3034
3035 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3036 !!sdata->default_key)
3037 continue;
3038
3039 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3040 bss->freq != freq)
3041 continue;
3042
3043 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3044 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3045 continue;
3046
3047 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3048 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3049 continue;
3050
3051 if (!selected || top_rssi < bss->rssi) {
3052 selected = bss;
3053 top_rssi = bss->rssi;
3054 }
3055 }
3056 if (selected)
3057 atomic_inc(&selected->users);
3058 spin_unlock_bh(&local->sta_bss_lock);
3059
3060 if (selected) {
3061 ieee80211_set_freq(local, selected->freq);
3062 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3063 ieee80211_sta_set_ssid(dev, selected->ssid,
3064 selected->ssid_len);
3065 ieee80211_sta_set_bssid(dev, selected->bssid);
3066 ieee80211_rx_bss_put(dev, selected);
3067 ifsta->state = IEEE80211_AUTHENTICATE;
3068 ieee80211_sta_reset_auth(dev, ifsta);
3069 return 0;
3070 } else {
3071 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3072 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3073 ieee80211_sta_start_scan(dev, NULL, 0);
3074 else
3075 ieee80211_sta_start_scan(dev, ifsta->ssid,
3076 ifsta->ssid_len);
3077 ifsta->state = IEEE80211_AUTHENTICATE;
3078 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3079 } else
3080 ifsta->state = IEEE80211_DISABLED;
3081 }
3082 return -1;
3083 }
3084
3085
3086 static int ieee80211_sta_create_ibss(struct net_device *dev,
3087 struct ieee80211_if_sta *ifsta)
3088 {
3089 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3090 struct ieee80211_sta_bss *bss;
3091 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3092 struct ieee80211_supported_band *sband;
3093 u8 bssid[ETH_ALEN], *pos;
3094 int i;
3095 DECLARE_MAC_BUF(mac);
3096
3097 #if 0
3098 /* Easier testing, use fixed BSSID. */
3099 memset(bssid, 0xfe, ETH_ALEN);
3100 #else
3101 /* Generate random, not broadcast, locally administered BSSID. Mix in
3102 * own MAC address to make sure that devices that do not have proper
3103 * random number generator get different BSSID. */
3104 get_random_bytes(bssid, ETH_ALEN);
3105 for (i = 0; i < ETH_ALEN; i++)
3106 bssid[i] ^= dev->dev_addr[i];
3107 bssid[0] &= ~0x01;
3108 bssid[0] |= 0x02;
3109 #endif
3110
3111 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3112 dev->name, print_mac(mac, bssid));
3113
3114 bss = ieee80211_rx_bss_add(dev, bssid,
3115 local->hw.conf.channel->center_freq,
3116 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3117 if (!bss)
3118 return -ENOMEM;
3119
3120 bss->band = local->hw.conf.channel->band;
3121 sband = local->hw.wiphy->bands[bss->band];
3122
3123 if (local->hw.conf.beacon_int == 0)
3124 local->hw.conf.beacon_int = 100;
3125 bss->beacon_int = local->hw.conf.beacon_int;
3126 bss->last_update = jiffies;
3127 bss->capability = WLAN_CAPABILITY_IBSS;
3128 if (sdata->default_key) {
3129 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3130 } else
3131 sdata->drop_unencrypted = 0;
3132 bss->supp_rates_len = sband->n_bitrates;
3133 pos = bss->supp_rates;
3134 for (i = 0; i < sband->n_bitrates; i++) {
3135 int rate = sband->bitrates[i].bitrate;
3136 *pos++ = (u8) (rate / 5);
3137 }
3138
3139 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3140 }
3141
3142
3143 static int ieee80211_sta_find_ibss(struct net_device *dev,
3144 struct ieee80211_if_sta *ifsta)
3145 {
3146 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3147 struct ieee80211_sta_bss *bss;
3148 int found = 0;
3149 u8 bssid[ETH_ALEN];
3150 int active_ibss;
3151 DECLARE_MAC_BUF(mac);
3152 DECLARE_MAC_BUF(mac2);
3153
3154 if (ifsta->ssid_len == 0)
3155 return -EINVAL;
3156
3157 active_ibss = ieee80211_sta_active_ibss(dev);
3158 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3159 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3160 dev->name, active_ibss);
3161 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3162 spin_lock_bh(&local->sta_bss_lock);
3163 list_for_each_entry(bss, &local->sta_bss_list, list) {
3164 if (ifsta->ssid_len != bss->ssid_len ||
3165 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3166 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3167 continue;
3168 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3169 printk(KERN_DEBUG " bssid=%s found\n",
3170 print_mac(mac, bss->bssid));
3171 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3172 memcpy(bssid, bss->bssid, ETH_ALEN);
3173 found = 1;
3174 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3175 break;
3176 }
3177 spin_unlock_bh(&local->sta_bss_lock);
3178
3179 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3180 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3181 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3182 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3183 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3184 (bss = ieee80211_rx_bss_get(dev, bssid,
3185 local->hw.conf.channel->center_freq,
3186 ifsta->ssid, ifsta->ssid_len))) {
3187 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3188 " based on configured SSID\n",
3189 dev->name, print_mac(mac, bssid));
3190 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3191 }
3192 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3193 printk(KERN_DEBUG " did not try to join ibss\n");
3194 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3195
3196 /* Selected IBSS not found in current scan results - try to scan */
3197 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3198 !ieee80211_sta_active_ibss(dev)) {
3199 mod_timer(&ifsta->timer, jiffies +
3200 IEEE80211_IBSS_MERGE_INTERVAL);
3201 } else if (time_after(jiffies, local->last_scan_completed +
3202 IEEE80211_SCAN_INTERVAL)) {
3203 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3204 "join\n", dev->name);
3205 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3206 ifsta->ssid_len);
3207 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3208 int interval = IEEE80211_SCAN_INTERVAL;
3209
3210 if (time_after(jiffies, ifsta->ibss_join_req +
3211 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3212 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3213 (!(local->oper_channel->flags &
3214 IEEE80211_CHAN_NO_IBSS)))
3215 return ieee80211_sta_create_ibss(dev, ifsta);
3216 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3217 printk(KERN_DEBUG "%s: IBSS not allowed on"
3218 " %d MHz\n", dev->name,
3219 local->hw.conf.channel->center_freq);
3220 }
3221
3222 /* No IBSS found - decrease scan interval and continue
3223 * scanning. */
3224 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3225 }
3226
3227 ifsta->state = IEEE80211_IBSS_SEARCH;
3228 mod_timer(&ifsta->timer, jiffies + interval);
3229 return 0;
3230 }
3231
3232 return 0;
3233 }
3234
3235
3236 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3237 {
3238 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3239 struct ieee80211_if_sta *ifsta;
3240 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3241
3242 if (len > IEEE80211_MAX_SSID_LEN)
3243 return -EINVAL;
3244
3245 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3246 * not defined. */
3247 if (local->ops->conf_tx) {
3248 struct ieee80211_tx_queue_params qparam;
3249 int i;
3250
3251 memset(&qparam, 0, sizeof(qparam));
3252
3253 qparam.aifs = 2;
3254
3255 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3256 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3257 qparam.cw_min = 31;
3258 else
3259 qparam.cw_min = 15;
3260
3261 qparam.cw_max = 1023;
3262 qparam.txop = 0;
3263
3264 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3265 local->ops->conf_tx(local_to_hw(local),
3266 i + IEEE80211_TX_QUEUE_DATA0,
3267 &qparam);
3268
3269 /* IBSS uses different parameters for Beacon sending */
3270 qparam.cw_min++;
3271 qparam.cw_min *= 2;
3272 qparam.cw_min--;
3273 local->ops->conf_tx(local_to_hw(local),
3274 IEEE80211_TX_QUEUE_BEACON, &qparam);
3275 }
3276
3277 ifsta = &sdata->u.sta;
3278
3279 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3280 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3281 memcpy(ifsta->ssid, ssid, len);
3282 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3283 ifsta->ssid_len = len;
3284
3285 if (len)
3286 ifsta->flags |= IEEE80211_STA_SSID_SET;
3287 else
3288 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3289 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3290 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3291 ifsta->ibss_join_req = jiffies;
3292 ifsta->state = IEEE80211_IBSS_SEARCH;
3293 return ieee80211_sta_find_ibss(dev, ifsta);
3294 }
3295 return 0;
3296 }
3297
3298
3299 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3300 {
3301 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3302 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3303 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3304 *len = ifsta->ssid_len;
3305 return 0;
3306 }
3307
3308
3309 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3310 {
3311 struct ieee80211_sub_if_data *sdata;
3312 struct ieee80211_if_sta *ifsta;
3313 int res;
3314
3315 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3316 ifsta = &sdata->u.sta;
3317
3318 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3319 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3320 res = ieee80211_if_config(dev);
3321 if (res) {
3322 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3323 "the low-level driver\n", dev->name);
3324 return res;
3325 }
3326 }
3327
3328 if (is_valid_ether_addr(bssid))
3329 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3330 else
3331 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3332
3333 return 0;
3334 }
3335
3336
3337 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3338 struct ieee80211_sub_if_data *sdata,
3339 int powersave)
3340 {
3341 struct sk_buff *skb;
3342 struct ieee80211_hdr *nullfunc;
3343 u16 fc;
3344
3345 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3346 if (!skb) {
3347 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3348 "frame\n", sdata->dev->name);
3349 return;
3350 }
3351 skb_reserve(skb, local->hw.extra_tx_headroom);
3352
3353 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3354 memset(nullfunc, 0, 24);
3355 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3356 IEEE80211_FCTL_TODS;
3357 if (powersave)
3358 fc |= IEEE80211_FCTL_PM;
3359 nullfunc->frame_control = cpu_to_le16(fc);
3360 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3361 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3362 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3363
3364 ieee80211_sta_tx(sdata->dev, skb, 0);
3365 }
3366
3367
3368 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3369 {
3370 struct ieee80211_local *local = hw_to_local(hw);
3371 struct net_device *dev = local->scan_dev;
3372 struct ieee80211_sub_if_data *sdata;
3373 union iwreq_data wrqu;
3374
3375 local->last_scan_completed = jiffies;
3376 memset(&wrqu, 0, sizeof(wrqu));
3377 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3378
3379 if (local->sta_hw_scanning) {
3380 local->sta_hw_scanning = 0;
3381 goto done;
3382 }
3383
3384 local->sta_sw_scanning = 0;
3385 if (ieee80211_hw_config(local))
3386 printk(KERN_DEBUG "%s: failed to restore operational "
3387 "channel after scan\n", dev->name);
3388
3389
3390 netif_tx_lock_bh(local->mdev);
3391 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3392 local->ops->configure_filter(local_to_hw(local),
3393 FIF_BCN_PRBRESP_PROMISC,
3394 &local->filter_flags,
3395 local->mdev->mc_count,
3396 local->mdev->mc_list);
3397
3398 netif_tx_unlock_bh(local->mdev);
3399
3400 rcu_read_lock();
3401 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3402
3403 /* No need to wake the master device. */
3404 if (sdata->dev == local->mdev)
3405 continue;
3406
3407 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3408 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3409 ieee80211_send_nullfunc(local, sdata, 0);
3410 ieee80211_sta_timer((unsigned long)sdata);
3411 }
3412
3413 netif_wake_queue(sdata->dev);
3414 }
3415 rcu_read_unlock();
3416
3417 done:
3418 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3419 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3420 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3421 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3422 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3423 !ieee80211_sta_active_ibss(dev)))
3424 ieee80211_sta_find_ibss(dev, ifsta);
3425 }
3426 }
3427 EXPORT_SYMBOL(ieee80211_scan_completed);
3428
3429 void ieee80211_sta_scan_work(struct work_struct *work)
3430 {
3431 struct ieee80211_local *local =
3432 container_of(work, struct ieee80211_local, scan_work.work);
3433 struct net_device *dev = local->scan_dev;
3434 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3435 struct ieee80211_supported_band *sband;
3436 struct ieee80211_channel *chan;
3437 int skip;
3438 unsigned long next_delay = 0;
3439
3440 if (!local->sta_sw_scanning)
3441 return;
3442
3443 switch (local->scan_state) {
3444 case SCAN_SET_CHANNEL:
3445 /*
3446 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3447 * after we successfully scanned the last channel of the last
3448 * band (and the last band is supported by the hw)
3449 */
3450 if (local->scan_band < IEEE80211_NUM_BANDS)
3451 sband = local->hw.wiphy->bands[local->scan_band];
3452 else
3453 sband = NULL;
3454
3455 /*
3456 * If we are at an unsupported band and have more bands
3457 * left to scan, advance to the next supported one.
3458 */
3459 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3460 local->scan_band++;
3461 sband = local->hw.wiphy->bands[local->scan_band];
3462 local->scan_channel_idx = 0;
3463 }
3464
3465 /* if no more bands/channels left, complete scan */
3466 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3467 ieee80211_scan_completed(local_to_hw(local));
3468 return;
3469 }
3470 skip = 0;
3471 chan = &sband->channels[local->scan_channel_idx];
3472
3473 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3474 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3475 chan->flags & IEEE80211_CHAN_NO_IBSS))
3476 skip = 1;
3477
3478 if (!skip) {
3479 local->scan_channel = chan;
3480 if (ieee80211_hw_config(local)) {
3481 printk(KERN_DEBUG "%s: failed to set freq to "
3482 "%d MHz for scan\n", dev->name,
3483 chan->center_freq);
3484 skip = 1;
3485 }
3486 }
3487
3488 /* advance state machine to next channel/band */
3489 local->scan_channel_idx++;
3490 if (local->scan_channel_idx >= sband->n_channels) {
3491 /*
3492 * scan_band may end up == IEEE80211_NUM_BANDS, but
3493 * we'll catch that case above and complete the scan
3494 * if that is the case.
3495 */
3496 local->scan_band++;
3497 local->scan_channel_idx = 0;
3498 }
3499
3500 if (skip)
3501 break;
3502
3503 next_delay = IEEE80211_PROBE_DELAY +
3504 usecs_to_jiffies(local->hw.channel_change_time);
3505 local->scan_state = SCAN_SEND_PROBE;
3506 break;
3507 case SCAN_SEND_PROBE:
3508 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3509 local->scan_state = SCAN_SET_CHANNEL;
3510
3511 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3512 break;
3513 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3514 local->scan_ssid_len);
3515 next_delay = IEEE80211_CHANNEL_TIME;
3516 break;
3517 }
3518
3519 if (local->sta_sw_scanning)
3520 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3521 next_delay);
3522 }
3523
3524
3525 static int ieee80211_sta_start_scan(struct net_device *dev,
3526 u8 *ssid, size_t ssid_len)
3527 {
3528 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3529 struct ieee80211_sub_if_data *sdata;
3530
3531 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3532 return -EINVAL;
3533
3534 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3535 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3536 * BSSID: MACAddress
3537 * SSID
3538 * ScanType: ACTIVE, PASSIVE
3539 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3540 * a Probe frame during active scanning
3541 * ChannelList
3542 * MinChannelTime (>= ProbeDelay), in TU
3543 * MaxChannelTime: (>= MinChannelTime), in TU
3544 */
3545
3546 /* MLME-SCAN.confirm
3547 * BSSDescriptionSet
3548 * ResultCode: SUCCESS, INVALID_PARAMETERS
3549 */
3550
3551 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3552 if (local->scan_dev == dev)
3553 return 0;
3554 return -EBUSY;
3555 }
3556
3557 if (local->ops->hw_scan) {
3558 int rc = local->ops->hw_scan(local_to_hw(local),
3559 ssid, ssid_len);
3560 if (!rc) {
3561 local->sta_hw_scanning = 1;
3562 local->scan_dev = dev;
3563 }
3564 return rc;
3565 }
3566
3567 local->sta_sw_scanning = 1;
3568
3569 rcu_read_lock();
3570 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3571
3572 /* Don't stop the master interface, otherwise we can't transmit
3573 * probes! */
3574 if (sdata->dev == local->mdev)
3575 continue;
3576
3577 netif_stop_queue(sdata->dev);
3578 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3579 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3580 ieee80211_send_nullfunc(local, sdata, 1);
3581 }
3582 rcu_read_unlock();
3583
3584 if (ssid) {
3585 local->scan_ssid_len = ssid_len;
3586 memcpy(local->scan_ssid, ssid, ssid_len);
3587 } else
3588 local->scan_ssid_len = 0;
3589 local->scan_state = SCAN_SET_CHANNEL;
3590 local->scan_channel_idx = 0;
3591 local->scan_band = IEEE80211_BAND_2GHZ;
3592 local->scan_dev = dev;
3593
3594 netif_tx_lock_bh(local->mdev);
3595 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3596 local->ops->configure_filter(local_to_hw(local),
3597 FIF_BCN_PRBRESP_PROMISC,
3598 &local->filter_flags,
3599 local->mdev->mc_count,
3600 local->mdev->mc_list);
3601 netif_tx_unlock_bh(local->mdev);
3602
3603 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3604 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3605 IEEE80211_CHANNEL_TIME);
3606
3607 return 0;
3608 }
3609
3610
3611 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3612 {
3613 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3614 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3615 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3616
3617 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3618 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3619
3620 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3621 if (local->scan_dev == dev)
3622 return 0;
3623 return -EBUSY;
3624 }
3625
3626 ifsta->scan_ssid_len = ssid_len;
3627 if (ssid_len)
3628 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3629 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3630 queue_work(local->hw.workqueue, &ifsta->work);
3631 return 0;
3632 }
3633
3634 static char *
3635 ieee80211_sta_scan_result(struct net_device *dev,
3636 struct ieee80211_sta_bss *bss,
3637 char *current_ev, char *end_buf)
3638 {
3639 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3640 struct iw_event iwe;
3641
3642 if (time_after(jiffies,
3643 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3644 return current_ev;
3645
3646 memset(&iwe, 0, sizeof(iwe));
3647 iwe.cmd = SIOCGIWAP;
3648 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3649 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3650 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3651 IW_EV_ADDR_LEN);
3652
3653 memset(&iwe, 0, sizeof(iwe));
3654 iwe.cmd = SIOCGIWESSID;
3655 iwe.u.data.length = bss->ssid_len;
3656 iwe.u.data.flags = 1;
3657 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3658 bss->ssid);
3659
3660 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3661 memset(&iwe, 0, sizeof(iwe));
3662 iwe.cmd = SIOCGIWMODE;
3663 if (bss->capability & WLAN_CAPABILITY_ESS)
3664 iwe.u.mode = IW_MODE_MASTER;
3665 else
3666 iwe.u.mode = IW_MODE_ADHOC;
3667 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3668 IW_EV_UINT_LEN);
3669 }
3670
3671 memset(&iwe, 0, sizeof(iwe));
3672 iwe.cmd = SIOCGIWFREQ;
3673 iwe.u.freq.m = bss->freq;
3674 iwe.u.freq.e = 6;
3675 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3676 IW_EV_FREQ_LEN);
3677
3678 memset(&iwe, 0, sizeof(iwe));
3679 iwe.cmd = SIOCGIWFREQ;
3680 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3681 iwe.u.freq.e = 0;
3682 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3683 IW_EV_FREQ_LEN);
3684
3685 memset(&iwe, 0, sizeof(iwe));
3686 iwe.cmd = IWEVQUAL;
3687 iwe.u.qual.qual = bss->signal;
3688 iwe.u.qual.level = bss->rssi;
3689 iwe.u.qual.noise = bss->noise;
3690 iwe.u.qual.updated = local->wstats_flags;
3691 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3692 IW_EV_QUAL_LEN);
3693
3694 memset(&iwe, 0, sizeof(iwe));
3695 iwe.cmd = SIOCGIWENCODE;
3696 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3697 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3698 else
3699 iwe.u.data.flags = IW_ENCODE_DISABLED;
3700 iwe.u.data.length = 0;
3701 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3702
3703 if (bss && bss->wpa_ie) {
3704 memset(&iwe, 0, sizeof(iwe));
3705 iwe.cmd = IWEVGENIE;
3706 iwe.u.data.length = bss->wpa_ie_len;
3707 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3708 bss->wpa_ie);
3709 }
3710
3711 if (bss && bss->rsn_ie) {
3712 memset(&iwe, 0, sizeof(iwe));
3713 iwe.cmd = IWEVGENIE;
3714 iwe.u.data.length = bss->rsn_ie_len;
3715 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3716 bss->rsn_ie);
3717 }
3718
3719 if (bss && bss->supp_rates_len > 0) {
3720 /* display all supported rates in readable format */
3721 char *p = current_ev + IW_EV_LCP_LEN;
3722 int i;
3723
3724 memset(&iwe, 0, sizeof(iwe));
3725 iwe.cmd = SIOCGIWRATE;
3726 /* Those two flags are ignored... */
3727 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3728
3729 for (i = 0; i < bss->supp_rates_len; i++) {
3730 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3731 0x7f) * 500000);
3732 p = iwe_stream_add_value(current_ev, p,
3733 end_buf, &iwe, IW_EV_PARAM_LEN);
3734 }
3735 current_ev = p;
3736 }
3737
3738 if (bss) {
3739 char *buf;
3740 buf = kmalloc(30, GFP_ATOMIC);
3741 if (buf) {
3742 memset(&iwe, 0, sizeof(iwe));
3743 iwe.cmd = IWEVCUSTOM;
3744 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3745 iwe.u.data.length = strlen(buf);
3746 current_ev = iwe_stream_add_point(current_ev, end_buf,
3747 &iwe, buf);
3748 kfree(buf);
3749 }
3750 }
3751
3752 return current_ev;
3753 }
3754
3755
3756 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3757 {
3758 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3759 char *current_ev = buf;
3760 char *end_buf = buf + len;
3761 struct ieee80211_sta_bss *bss;
3762
3763 spin_lock_bh(&local->sta_bss_lock);
3764 list_for_each_entry(bss, &local->sta_bss_list, list) {
3765 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3766 spin_unlock_bh(&local->sta_bss_lock);
3767 return -E2BIG;
3768 }
3769 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3770 end_buf);
3771 }
3772 spin_unlock_bh(&local->sta_bss_lock);
3773 return current_ev - buf;
3774 }
3775
3776
3777 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3778 {
3779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3780 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3781 kfree(ifsta->extra_ie);
3782 if (len == 0) {
3783 ifsta->extra_ie = NULL;
3784 ifsta->extra_ie_len = 0;
3785 return 0;
3786 }
3787 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3788 if (!ifsta->extra_ie) {
3789 ifsta->extra_ie_len = 0;
3790 return -ENOMEM;
3791 }
3792 memcpy(ifsta->extra_ie, ie, len);
3793 ifsta->extra_ie_len = len;
3794 return 0;
3795 }
3796
3797
3798 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3799 struct sk_buff *skb, u8 *bssid,
3800 u8 *addr)
3801 {
3802 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3803 struct sta_info *sta;
3804 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3805 DECLARE_MAC_BUF(mac);
3806
3807 /* TODO: Could consider removing the least recently used entry and
3808 * allow new one to be added. */
3809 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3810 if (net_ratelimit()) {
3811 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3812 "entry %s\n", dev->name, print_mac(mac, addr));
3813 }
3814 return NULL;
3815 }
3816
3817 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3818 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3819
3820 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3821 if (!sta)
3822 return NULL;
3823
3824 sta->flags |= WLAN_STA_AUTHORIZED;
3825
3826 sta->supp_rates[local->hw.conf.channel->band] =
3827 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
3828
3829 rate_control_rate_init(sta, local);
3830
3831 return sta; /* caller will call sta_info_put() */
3832 }
3833
3834
3835 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3836 {
3837 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3838 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3839
3840 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3841 dev->name, reason);
3842
3843 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3844 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3845 return -EINVAL;
3846
3847 ieee80211_send_deauth(dev, ifsta, reason);
3848 ieee80211_set_disassoc(dev, ifsta, 1);
3849 return 0;
3850 }
3851
3852
3853 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3854 {
3855 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3856 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3857
3858 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3859 dev->name, reason);
3860
3861 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3862 return -EINVAL;
3863
3864 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3865 return -1;
3866
3867 ieee80211_send_disassoc(dev, ifsta, reason);
3868 ieee80211_set_disassoc(dev, ifsta, 0);
3869 return 0;
3870 }
Linux kernel - Deliverables
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