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mac80211: A-MPDU Tx adding basic functionality
[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 channel,
78 u8 *ssid, u8 ssid_len);
79 static void ieee80211_rx_bss_put(struct net_device *dev,
80 struct ieee80211_sta_bss *bss);
81 static int ieee80211_sta_find_ibss(struct net_device *dev,
82 struct ieee80211_if_sta *ifsta);
83 static int ieee80211_sta_wep_configured(struct net_device *dev);
84 static int ieee80211_sta_start_scan(struct net_device *dev,
85 u8 *ssid, size_t ssid_len);
86 static int ieee80211_sta_config_auth(struct net_device *dev,
87 struct ieee80211_if_sta *ifsta);
88
89
90 /* Parsed Information Elements */
91 struct ieee802_11_elems {
92 /* pointers to IEs */
93 u8 *ssid;
94 u8 *supp_rates;
95 u8 *fh_params;
96 u8 *ds_params;
97 u8 *cf_params;
98 u8 *tim;
99 u8 *ibss_params;
100 u8 *challenge;
101 u8 *wpa;
102 u8 *rsn;
103 u8 *erp_info;
104 u8 *ext_supp_rates;
105 u8 *wmm_info;
106 u8 *wmm_param;
107 u8 *ht_cap_elem;
108 u8 *ht_info_elem;
109 /* length of them, respectively */
110 u8 ssid_len;
111 u8 supp_rates_len;
112 u8 fh_params_len;
113 u8 ds_params_len;
114 u8 cf_params_len;
115 u8 tim_len;
116 u8 ibss_params_len;
117 u8 challenge_len;
118 u8 wpa_len;
119 u8 rsn_len;
120 u8 erp_info_len;
121 u8 ext_supp_rates_len;
122 u8 wmm_info_len;
123 u8 wmm_param_len;
124 u8 ht_cap_elem_len;
125 u8 ht_info_elem_len;
126 };
127
128 static void ieee802_11_parse_elems(u8 *start, size_t len,
129 struct ieee802_11_elems *elems)
130 {
131 size_t left = len;
132 u8 *pos = start;
133
134 memset(elems, 0, sizeof(*elems));
135
136 while (left >= 2) {
137 u8 id, elen;
138
139 id = *pos++;
140 elen = *pos++;
141 left -= 2;
142
143 if (elen > left)
144 return;
145
146 switch (id) {
147 case WLAN_EID_SSID:
148 elems->ssid = pos;
149 elems->ssid_len = elen;
150 break;
151 case WLAN_EID_SUPP_RATES:
152 elems->supp_rates = pos;
153 elems->supp_rates_len = elen;
154 break;
155 case WLAN_EID_FH_PARAMS:
156 elems->fh_params = pos;
157 elems->fh_params_len = elen;
158 break;
159 case WLAN_EID_DS_PARAMS:
160 elems->ds_params = pos;
161 elems->ds_params_len = elen;
162 break;
163 case WLAN_EID_CF_PARAMS:
164 elems->cf_params = pos;
165 elems->cf_params_len = elen;
166 break;
167 case WLAN_EID_TIM:
168 elems->tim = pos;
169 elems->tim_len = elen;
170 break;
171 case WLAN_EID_IBSS_PARAMS:
172 elems->ibss_params = pos;
173 elems->ibss_params_len = elen;
174 break;
175 case WLAN_EID_CHALLENGE:
176 elems->challenge = pos;
177 elems->challenge_len = elen;
178 break;
179 case WLAN_EID_WPA:
180 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
181 pos[2] == 0xf2) {
182 /* Microsoft OUI (00:50:F2) */
183 if (pos[3] == 1) {
184 /* OUI Type 1 - WPA IE */
185 elems->wpa = pos;
186 elems->wpa_len = elen;
187 } else if (elen >= 5 && pos[3] == 2) {
188 if (pos[4] == 0) {
189 elems->wmm_info = pos;
190 elems->wmm_info_len = elen;
191 } else if (pos[4] == 1) {
192 elems->wmm_param = pos;
193 elems->wmm_param_len = elen;
194 }
195 }
196 }
197 break;
198 case WLAN_EID_RSN:
199 elems->rsn = pos;
200 elems->rsn_len = elen;
201 break;
202 case WLAN_EID_ERP_INFO:
203 elems->erp_info = pos;
204 elems->erp_info_len = elen;
205 break;
206 case WLAN_EID_EXT_SUPP_RATES:
207 elems->ext_supp_rates = pos;
208 elems->ext_supp_rates_len = elen;
209 break;
210 case WLAN_EID_HT_CAPABILITY:
211 elems->ht_cap_elem = pos;
212 elems->ht_cap_elem_len = elen;
213 break;
214 case WLAN_EID_HT_EXTRA_INFO:
215 elems->ht_info_elem = pos;
216 elems->ht_info_elem_len = elen;
217 break;
218 default:
219 break;
220 }
221
222 left -= elen;
223 pos += elen;
224 }
225 }
226
227
228 static int ecw2cw(int ecw)
229 {
230 int cw = 1;
231 while (ecw > 0) {
232 cw <<= 1;
233 ecw--;
234 }
235 return cw - 1;
236 }
237
238 static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241 {
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(&params, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313 }
314
315
316 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
317 u8 erp_value)
318 {
319 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
320 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
321 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
322 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
323 DECLARE_MAC_BUF(mac);
324 u32 changed = 0;
325
326 if (use_protection != bss_conf->use_cts_prot) {
327 if (net_ratelimit()) {
328 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
329 "%s)\n",
330 sdata->dev->name,
331 use_protection ? "enabled" : "disabled",
332 print_mac(mac, ifsta->bssid));
333 }
334 bss_conf->use_cts_prot = use_protection;
335 changed |= BSS_CHANGED_ERP_CTS_PROT;
336 }
337
338 if (preamble_mode != bss_conf->use_short_preamble) {
339 if (net_ratelimit()) {
340 printk(KERN_DEBUG "%s: switched to %s barker preamble"
341 " (BSSID=%s)\n",
342 sdata->dev->name,
343 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
344 "short" : "long",
345 print_mac(mac, ifsta->bssid));
346 }
347 bss_conf->use_short_preamble = preamble_mode;
348 changed |= BSS_CHANGED_ERP_PREAMBLE;
349 }
350
351 return changed;
352 }
353
354 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
355 struct ieee80211_ht_info *ht_info)
356 {
357
358 if (ht_info == NULL)
359 return -EINVAL;
360
361 memset(ht_info, 0, sizeof(*ht_info));
362
363 if (ht_cap_ie) {
364 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
365
366 ht_info->ht_supported = 1;
367 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
368 ht_info->ampdu_factor =
369 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
370 ht_info->ampdu_density =
371 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
372 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
373 } else
374 ht_info->ht_supported = 0;
375
376 return 0;
377 }
378
379 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
380 struct ieee80211_ht_addt_info *ht_add_info_ie,
381 struct ieee80211_ht_bss_info *bss_info)
382 {
383 if (bss_info == NULL)
384 return -EINVAL;
385
386 memset(bss_info, 0, sizeof(*bss_info));
387
388 if (ht_add_info_ie) {
389 u16 op_mode;
390 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
391
392 bss_info->primary_channel = ht_add_info_ie->control_chan;
393 bss_info->bss_cap = ht_add_info_ie->ht_param;
394 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
395 }
396
397 return 0;
398 }
399
400 static void ieee80211_sta_send_associnfo(struct net_device *dev,
401 struct ieee80211_if_sta *ifsta)
402 {
403 char *buf;
404 size_t len;
405 int i;
406 union iwreq_data wrqu;
407
408 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
409 return;
410
411 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
412 ifsta->assocresp_ies_len), GFP_KERNEL);
413 if (!buf)
414 return;
415
416 len = sprintf(buf, "ASSOCINFO(");
417 if (ifsta->assocreq_ies) {
418 len += sprintf(buf + len, "ReqIEs=");
419 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
420 len += sprintf(buf + len, "%02x",
421 ifsta->assocreq_ies[i]);
422 }
423 }
424 if (ifsta->assocresp_ies) {
425 if (ifsta->assocreq_ies)
426 len += sprintf(buf + len, " ");
427 len += sprintf(buf + len, "RespIEs=");
428 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
429 len += sprintf(buf + len, "%02x",
430 ifsta->assocresp_ies[i]);
431 }
432 }
433 len += sprintf(buf + len, ")");
434
435 if (len > IW_CUSTOM_MAX) {
436 len = sprintf(buf, "ASSOCRESPIE=");
437 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
438 len += sprintf(buf + len, "%02x",
439 ifsta->assocresp_ies[i]);
440 }
441 }
442
443 memset(&wrqu, 0, sizeof(wrqu));
444 wrqu.data.length = len;
445 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
446
447 kfree(buf);
448 }
449
450
451 static void ieee80211_set_associated(struct net_device *dev,
452 struct ieee80211_if_sta *ifsta,
453 bool assoc)
454 {
455 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
456 struct ieee80211_local *local = sdata->local;
457 union iwreq_data wrqu;
458 u32 changed = BSS_CHANGED_ASSOC;
459
460 if (assoc) {
461 struct ieee80211_sta_bss *bss;
462
463 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
464
465 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
466 return;
467
468 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
469 local->hw.conf.channel,
470 ifsta->ssid, ifsta->ssid_len);
471 if (bss) {
472 if (bss->has_erp_value)
473 changed |= ieee80211_handle_erp_ie(
474 sdata, bss->erp_value);
475 ieee80211_rx_bss_put(dev, bss);
476 }
477
478 netif_carrier_on(dev);
479 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
480 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
481 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
482 ieee80211_sta_send_associnfo(dev, ifsta);
483 } else {
484 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
485
486 netif_carrier_off(dev);
487 ieee80211_reset_erp_info(dev);
488 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
489 }
490 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
491 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
492 ifsta->last_probe = jiffies;
493 ieee80211_led_assoc(local, assoc);
494
495 sdata->bss_conf.assoc = assoc;
496 ieee80211_bss_info_change_notify(sdata, changed);
497 }
498
499 static void ieee80211_set_disassoc(struct net_device *dev,
500 struct ieee80211_if_sta *ifsta, int deauth)
501 {
502 if (deauth)
503 ifsta->auth_tries = 0;
504 ifsta->assoc_tries = 0;
505 ieee80211_set_associated(dev, ifsta, 0);
506 }
507
508 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
509 int encrypt)
510 {
511 struct ieee80211_sub_if_data *sdata;
512 struct ieee80211_tx_packet_data *pkt_data;
513
514 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
515 skb->dev = sdata->local->mdev;
516 skb_set_mac_header(skb, 0);
517 skb_set_network_header(skb, 0);
518 skb_set_transport_header(skb, 0);
519
520 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
521 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
522 pkt_data->ifindex = sdata->dev->ifindex;
523 if (!encrypt)
524 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
525
526 dev_queue_xmit(skb);
527 }
528
529
530 static void ieee80211_send_auth(struct net_device *dev,
531 struct ieee80211_if_sta *ifsta,
532 int transaction, u8 *extra, size_t extra_len,
533 int encrypt)
534 {
535 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
536 struct sk_buff *skb;
537 struct ieee80211_mgmt *mgmt;
538
539 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
540 sizeof(*mgmt) + 6 + extra_len);
541 if (!skb) {
542 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
543 "frame\n", dev->name);
544 return;
545 }
546 skb_reserve(skb, local->hw.extra_tx_headroom);
547
548 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
549 memset(mgmt, 0, 24 + 6);
550 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
551 IEEE80211_STYPE_AUTH);
552 if (encrypt)
553 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
554 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
555 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
556 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
557 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
558 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
559 ifsta->auth_transaction = transaction + 1;
560 mgmt->u.auth.status_code = cpu_to_le16(0);
561 if (extra)
562 memcpy(skb_put(skb, extra_len), extra, extra_len);
563
564 ieee80211_sta_tx(dev, skb, encrypt);
565 }
566
567
568 static void ieee80211_authenticate(struct net_device *dev,
569 struct ieee80211_if_sta *ifsta)
570 {
571 DECLARE_MAC_BUF(mac);
572
573 ifsta->auth_tries++;
574 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
575 printk(KERN_DEBUG "%s: authentication with AP %s"
576 " timed out\n",
577 dev->name, print_mac(mac, ifsta->bssid));
578 ifsta->state = IEEE80211_DISABLED;
579 return;
580 }
581
582 ifsta->state = IEEE80211_AUTHENTICATE;
583 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
584 dev->name, print_mac(mac, ifsta->bssid));
585
586 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
587
588 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
589 }
590
591
592 static void ieee80211_send_assoc(struct net_device *dev,
593 struct ieee80211_if_sta *ifsta)
594 {
595 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
596 struct ieee80211_hw_mode *mode;
597 struct sk_buff *skb;
598 struct ieee80211_mgmt *mgmt;
599 u8 *pos, *ies;
600 int i, len;
601 u16 capab;
602 struct ieee80211_sta_bss *bss;
603 int wmm = 0;
604
605 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
606 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
607 ifsta->ssid_len);
608 if (!skb) {
609 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
610 "frame\n", dev->name);
611 return;
612 }
613 skb_reserve(skb, local->hw.extra_tx_headroom);
614
615 mode = local->oper_hw_mode;
616 capab = ifsta->capab;
617 if (mode->mode == MODE_IEEE80211G) {
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
619 WLAN_CAPABILITY_SHORT_PREAMBLE;
620 }
621 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
622 ifsta->ssid, ifsta->ssid_len);
623 if (bss) {
624 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
625 capab |= WLAN_CAPABILITY_PRIVACY;
626 if (bss->wmm_ie) {
627 wmm = 1;
628 }
629 ieee80211_rx_bss_put(dev, bss);
630 }
631
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
633 memset(mgmt, 0, 24);
634 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
635 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
636 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
637
638 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
639 skb_put(skb, 10);
640 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
641 IEEE80211_STYPE_REASSOC_REQ);
642 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
643 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
644 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
645 ETH_ALEN);
646 } else {
647 skb_put(skb, 4);
648 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
649 IEEE80211_STYPE_ASSOC_REQ);
650 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
651 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
652 }
653
654 /* SSID */
655 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = ifsta->ssid_len;
658 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
659
660 len = mode->num_rates;
661 if (len > 8)
662 len = 8;
663 pos = skb_put(skb, len + 2);
664 *pos++ = WLAN_EID_SUPP_RATES;
665 *pos++ = len;
666 for (i = 0; i < len; i++) {
667 int rate = mode->rates[i].rate;
668 *pos++ = (u8) (rate / 5);
669 }
670
671 if (mode->num_rates > len) {
672 pos = skb_put(skb, mode->num_rates - len + 2);
673 *pos++ = WLAN_EID_EXT_SUPP_RATES;
674 *pos++ = mode->num_rates - len;
675 for (i = len; i < mode->num_rates; i++) {
676 int rate = mode->rates[i].rate;
677 *pos++ = (u8) (rate / 5);
678 }
679 }
680
681 if (ifsta->extra_ie) {
682 pos = skb_put(skb, ifsta->extra_ie_len);
683 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
684 }
685
686 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
687 pos = skb_put(skb, 9);
688 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
689 *pos++ = 7; /* len */
690 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
691 *pos++ = 0x50;
692 *pos++ = 0xf2;
693 *pos++ = 2; /* WME */
694 *pos++ = 0; /* WME info */
695 *pos++ = 1; /* WME ver */
696 *pos++ = 0;
697 }
698 /* wmm support is a must to HT */
699 if (wmm && mode->ht_info.ht_supported) {
700 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
701 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
702 *pos++ = WLAN_EID_HT_CAPABILITY;
703 *pos++ = sizeof(struct ieee80211_ht_cap);
704 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
705 memcpy(pos, &tmp, sizeof(u16));
706 pos += sizeof(u16);
707 *pos++ = (mode->ht_info.ampdu_factor |
708 (mode->ht_info.ampdu_density << 2));
709 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
710 }
711
712 kfree(ifsta->assocreq_ies);
713 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
714 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
715 if (ifsta->assocreq_ies)
716 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
717
718 ieee80211_sta_tx(dev, skb, 0);
719 }
720
721
722 static void ieee80211_send_deauth(struct net_device *dev,
723 struct ieee80211_if_sta *ifsta, u16 reason)
724 {
725 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
726 struct sk_buff *skb;
727 struct ieee80211_mgmt *mgmt;
728
729 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
730 if (!skb) {
731 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
732 "frame\n", dev->name);
733 return;
734 }
735 skb_reserve(skb, local->hw.extra_tx_headroom);
736
737 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
738 memset(mgmt, 0, 24);
739 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
740 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
741 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
742 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
743 IEEE80211_STYPE_DEAUTH);
744 skb_put(skb, 2);
745 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
746
747 ieee80211_sta_tx(dev, skb, 0);
748 }
749
750
751 static void ieee80211_send_disassoc(struct net_device *dev,
752 struct ieee80211_if_sta *ifsta, u16 reason)
753 {
754 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
755 struct sk_buff *skb;
756 struct ieee80211_mgmt *mgmt;
757
758 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
759 if (!skb) {
760 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
761 "frame\n", dev->name);
762 return;
763 }
764 skb_reserve(skb, local->hw.extra_tx_headroom);
765
766 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
767 memset(mgmt, 0, 24);
768 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
769 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
770 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
771 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
772 IEEE80211_STYPE_DISASSOC);
773 skb_put(skb, 2);
774 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
775
776 ieee80211_sta_tx(dev, skb, 0);
777 }
778
779
780 static int ieee80211_privacy_mismatch(struct net_device *dev,
781 struct ieee80211_if_sta *ifsta)
782 {
783 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
784 struct ieee80211_sta_bss *bss;
785 int bss_privacy;
786 int wep_privacy;
787 int privacy_invoked;
788
789 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
790 return 0;
791
792 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
793 ifsta->ssid, ifsta->ssid_len);
794 if (!bss)
795 return 0;
796
797 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
798 wep_privacy = !!ieee80211_sta_wep_configured(dev);
799 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
800
801 ieee80211_rx_bss_put(dev, bss);
802
803 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
804 return 0;
805
806 return 1;
807 }
808
809
810 static void ieee80211_associate(struct net_device *dev,
811 struct ieee80211_if_sta *ifsta)
812 {
813 DECLARE_MAC_BUF(mac);
814
815 ifsta->assoc_tries++;
816 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
817 printk(KERN_DEBUG "%s: association with AP %s"
818 " timed out\n",
819 dev->name, print_mac(mac, ifsta->bssid));
820 ifsta->state = IEEE80211_DISABLED;
821 return;
822 }
823
824 ifsta->state = IEEE80211_ASSOCIATE;
825 printk(KERN_DEBUG "%s: associate with AP %s\n",
826 dev->name, print_mac(mac, ifsta->bssid));
827 if (ieee80211_privacy_mismatch(dev, ifsta)) {
828 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
829 "mixed-cell disabled - abort association\n", dev->name);
830 ifsta->state = IEEE80211_DISABLED;
831 return;
832 }
833
834 ieee80211_send_assoc(dev, ifsta);
835
836 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
837 }
838
839
840 static void ieee80211_associated(struct net_device *dev,
841 struct ieee80211_if_sta *ifsta)
842 {
843 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
844 struct sta_info *sta;
845 int disassoc;
846 DECLARE_MAC_BUF(mac);
847
848 /* TODO: start monitoring current AP signal quality and number of
849 * missed beacons. Scan other channels every now and then and search
850 * for better APs. */
851 /* TODO: remove expired BSSes */
852
853 ifsta->state = IEEE80211_ASSOCIATED;
854
855 sta = sta_info_get(local, ifsta->bssid);
856 if (!sta) {
857 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
858 dev->name, print_mac(mac, ifsta->bssid));
859 disassoc = 1;
860 } else {
861 disassoc = 0;
862 if (time_after(jiffies,
863 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
864 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
865 printk(KERN_DEBUG "%s: No ProbeResp from "
866 "current AP %s - assume out of "
867 "range\n",
868 dev->name, print_mac(mac, ifsta->bssid));
869 disassoc = 1;
870 sta_info_free(sta);
871 } else
872 ieee80211_send_probe_req(dev, ifsta->bssid,
873 local->scan_ssid,
874 local->scan_ssid_len);
875 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
876 } else {
877 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
878 if (time_after(jiffies, ifsta->last_probe +
879 IEEE80211_PROBE_INTERVAL)) {
880 ifsta->last_probe = jiffies;
881 ieee80211_send_probe_req(dev, ifsta->bssid,
882 ifsta->ssid,
883 ifsta->ssid_len);
884 }
885 }
886 sta_info_put(sta);
887 }
888 if (disassoc) {
889 ifsta->state = IEEE80211_DISABLED;
890 ieee80211_set_associated(dev, ifsta, 0);
891 } else {
892 mod_timer(&ifsta->timer, jiffies +
893 IEEE80211_MONITORING_INTERVAL);
894 }
895 }
896
897
898 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
899 u8 *ssid, size_t ssid_len)
900 {
901 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
902 struct ieee80211_hw_mode *mode;
903 struct sk_buff *skb;
904 struct ieee80211_mgmt *mgmt;
905 u8 *pos, *supp_rates, *esupp_rates = NULL;
906 int i;
907
908 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
909 if (!skb) {
910 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
911 "request\n", dev->name);
912 return;
913 }
914 skb_reserve(skb, local->hw.extra_tx_headroom);
915
916 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
917 memset(mgmt, 0, 24);
918 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
919 IEEE80211_STYPE_PROBE_REQ);
920 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
921 if (dst) {
922 memcpy(mgmt->da, dst, ETH_ALEN);
923 memcpy(mgmt->bssid, dst, ETH_ALEN);
924 } else {
925 memset(mgmt->da, 0xff, ETH_ALEN);
926 memset(mgmt->bssid, 0xff, ETH_ALEN);
927 }
928 pos = skb_put(skb, 2 + ssid_len);
929 *pos++ = WLAN_EID_SSID;
930 *pos++ = ssid_len;
931 memcpy(pos, ssid, ssid_len);
932
933 supp_rates = skb_put(skb, 2);
934 supp_rates[0] = WLAN_EID_SUPP_RATES;
935 supp_rates[1] = 0;
936 mode = local->oper_hw_mode;
937 for (i = 0; i < mode->num_rates; i++) {
938 struct ieee80211_rate *rate = &mode->rates[i];
939 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
940 continue;
941 if (esupp_rates) {
942 pos = skb_put(skb, 1);
943 esupp_rates[1]++;
944 } else if (supp_rates[1] == 8) {
945 esupp_rates = skb_put(skb, 3);
946 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
947 esupp_rates[1] = 1;
948 pos = &esupp_rates[2];
949 } else {
950 pos = skb_put(skb, 1);
951 supp_rates[1]++;
952 }
953 *pos = rate->rate / 5;
954 }
955
956 ieee80211_sta_tx(dev, skb, 0);
957 }
958
959
960 static int ieee80211_sta_wep_configured(struct net_device *dev)
961 {
962 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
963 if (!sdata || !sdata->default_key ||
964 sdata->default_key->conf.alg != ALG_WEP)
965 return 0;
966 return 1;
967 }
968
969
970 static void ieee80211_auth_completed(struct net_device *dev,
971 struct ieee80211_if_sta *ifsta)
972 {
973 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
974 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
975 ieee80211_associate(dev, ifsta);
976 }
977
978
979 static void ieee80211_auth_challenge(struct net_device *dev,
980 struct ieee80211_if_sta *ifsta,
981 struct ieee80211_mgmt *mgmt,
982 size_t len)
983 {
984 u8 *pos;
985 struct ieee802_11_elems elems;
986
987 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
988 pos = mgmt->u.auth.variable;
989 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
990 if (!elems.challenge) {
991 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
992 "frame\n", dev->name);
993 return;
994 }
995 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
996 elems.challenge_len + 2, 1);
997 }
998
999 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1000 u8 dialog_token, u16 status, u16 policy,
1001 u16 buf_size, u16 timeout)
1002 {
1003 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1005 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1006 struct sk_buff *skb;
1007 struct ieee80211_mgmt *mgmt;
1008 u16 capab;
1009
1010 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1011 sizeof(mgmt->u.action.u.addba_resp));
1012 if (!skb) {
1013 printk(KERN_DEBUG "%s: failed to allocate buffer "
1014 "for addba resp frame\n", dev->name);
1015 return;
1016 }
1017
1018 skb_reserve(skb, local->hw.extra_tx_headroom);
1019 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1020 memset(mgmt, 0, 24);
1021 memcpy(mgmt->da, da, ETH_ALEN);
1022 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1023 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1024 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1025 else
1026 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1027 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1028 IEEE80211_STYPE_ACTION);
1029
1030 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1031 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1032 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1033 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1034
1035 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1036 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1037 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1038
1039 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1040 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1041 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1042
1043 ieee80211_sta_tx(dev, skb, 0);
1044
1045 return;
1046 }
1047
1048 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1049 u16 tid, u8 dialog_token, u16 start_seq_num,
1050 u16 agg_size, u16 timeout)
1051 {
1052 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1055 struct sk_buff *skb;
1056 struct ieee80211_mgmt *mgmt;
1057 u16 capab;
1058
1059 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1060 sizeof(mgmt->u.action.u.addba_req));
1061
1062
1063 if (!skb) {
1064 printk(KERN_ERR "%s: failed to allocate buffer "
1065 "for addba request frame\n", dev->name);
1066 return;
1067 }
1068 skb_reserve(skb, local->hw.extra_tx_headroom);
1069 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1070 memset(mgmt, 0, 24);
1071 memcpy(mgmt->da, da, ETH_ALEN);
1072 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1073 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1074 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1075 else
1076 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1077
1078 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1079 IEEE80211_STYPE_ACTION);
1080
1081 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1082
1083 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1084 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1085
1086 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1087 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1088 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1089 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1090
1091 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1092
1093 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1094 mgmt->u.action.u.addba_req.start_seq_num =
1095 cpu_to_le16(start_seq_num << 4);
1096
1097 ieee80211_sta_tx(dev, skb, 0);
1098 }
1099
1100 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1101 struct ieee80211_mgmt *mgmt,
1102 size_t len)
1103 {
1104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1105 struct ieee80211_hw *hw = &local->hw;
1106 struct ieee80211_conf *conf = &hw->conf;
1107 struct sta_info *sta;
1108 struct tid_ampdu_rx *tid_agg_rx;
1109 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1110 u8 dialog_token;
1111 int ret = -EOPNOTSUPP;
1112 DECLARE_MAC_BUF(mac);
1113
1114 sta = sta_info_get(local, mgmt->sa);
1115 if (!sta)
1116 return;
1117
1118 /* extract session parameters from addba request frame */
1119 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1120 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1121 start_seq_num =
1122 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1123
1124 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1125 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1126 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1127 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1128
1129 status = WLAN_STATUS_REQUEST_DECLINED;
1130
1131 /* sanity check for incoming parameters:
1132 * check if configuration can support the BA policy
1133 * and if buffer size does not exceeds max value */
1134 if (((ba_policy != 1)
1135 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1136 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1137 status = WLAN_STATUS_INVALID_QOS_PARAM;
1138 #ifdef CONFIG_MAC80211_HT_DEBUG
1139 if (net_ratelimit())
1140 printk(KERN_DEBUG "Block Ack Req with bad params from "
1141 "%s on tid %u. policy %d, buffer size %d\n",
1142 print_mac(mac, mgmt->sa), tid, ba_policy,
1143 buf_size);
1144 #endif /* CONFIG_MAC80211_HT_DEBUG */
1145 goto end_no_lock;
1146 }
1147 /* determine default buffer size */
1148 if (buf_size == 0) {
1149 struct ieee80211_hw_mode *mode = conf->mode;
1150 buf_size = IEEE80211_MIN_AMPDU_BUF;
1151 buf_size = buf_size << mode->ht_info.ampdu_factor;
1152 }
1153
1154 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1155
1156 /* examine state machine */
1157 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1158
1159 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1160 #ifdef CONFIG_MAC80211_HT_DEBUG
1161 if (net_ratelimit())
1162 printk(KERN_DEBUG "unexpected Block Ack Req from "
1163 "%s on tid %u\n",
1164 print_mac(mac, mgmt->sa), tid);
1165 #endif /* CONFIG_MAC80211_HT_DEBUG */
1166 goto end;
1167 }
1168
1169 /* prepare reordering buffer */
1170 tid_agg_rx->reorder_buf =
1171 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1172 if (!tid_agg_rx->reorder_buf) {
1173 if (net_ratelimit())
1174 printk(KERN_ERR "can not allocate reordering buffer "
1175 "to tid %d\n", tid);
1176 goto end;
1177 }
1178 memset(tid_agg_rx->reorder_buf, 0,
1179 buf_size * sizeof(struct sk_buf *));
1180
1181 if (local->ops->ampdu_action)
1182 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1183 sta->addr, tid, &start_seq_num);
1184 #ifdef CONFIG_MAC80211_HT_DEBUG
1185 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1186 #endif /* CONFIG_MAC80211_HT_DEBUG */
1187
1188 if (ret) {
1189 kfree(tid_agg_rx->reorder_buf);
1190 goto end;
1191 }
1192
1193 /* change state and send addba resp */
1194 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1195 tid_agg_rx->dialog_token = dialog_token;
1196 tid_agg_rx->ssn = start_seq_num;
1197 tid_agg_rx->head_seq_num = start_seq_num;
1198 tid_agg_rx->buf_size = buf_size;
1199 tid_agg_rx->timeout = timeout;
1200 tid_agg_rx->stored_mpdu_num = 0;
1201 status = WLAN_STATUS_SUCCESS;
1202 end:
1203 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1204
1205 end_no_lock:
1206 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1207 status, 1, buf_size, timeout);
1208 sta_info_put(sta);
1209 }
1210
1211 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1212 struct ieee80211_mgmt *mgmt,
1213 size_t len)
1214 {
1215 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1216 struct ieee80211_hw *hw = &local->hw;
1217 struct sta_info *sta;
1218 u16 capab;
1219 u16 tid;
1220 u8 *state;
1221
1222 sta = sta_info_get(local, mgmt->sa);
1223 if (!sta)
1224 return;
1225
1226 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1227 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1228
1229 state = &sta->ampdu_mlme.tid_tx[tid].state;
1230
1231 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1232
1233 if (mgmt->u.action.u.addba_resp.dialog_token !=
1234 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1235 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1236 #ifdef CONFIG_MAC80211_HT_DEBUG
1237 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1238 #endif /* CONFIG_MAC80211_HT_DEBUG */
1239 sta_info_put(sta);
1240 return;
1241 }
1242
1243 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1244 #ifdef CONFIG_MAC80211_HT_DEBUG
1245 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1246 #endif /* CONFIG_MAC80211_HT_DEBUG */
1247 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1248 == WLAN_STATUS_SUCCESS) {
1249 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1250 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1251 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1252 "%d\n", *state);
1253 sta_info_put(sta);
1254 return;
1255 }
1256
1257 if (*state & HT_ADDBA_RECEIVED_MSK)
1258 printk(KERN_DEBUG "double addBA response\n");
1259
1260 *state |= HT_ADDBA_RECEIVED_MSK;
1261 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1262
1263 if (*state == HT_AGG_STATE_OPERATIONAL) {
1264 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1265 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1266 }
1267
1268 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1269 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1270 } else {
1271 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1272
1273 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1274 /* this will allow the state check in stop_BA_session */
1275 *state = HT_AGG_STATE_OPERATIONAL;
1276 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1277 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1278 WLAN_BACK_INITIATOR);
1279 }
1280 sta_info_put(sta);
1281 }
1282
1283 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1284 u16 initiator, u16 reason_code)
1285 {
1286 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1287 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1288 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1289 struct sk_buff *skb;
1290 struct ieee80211_mgmt *mgmt;
1291 u16 params;
1292
1293 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1294 sizeof(mgmt->u.action.u.delba));
1295
1296 if (!skb) {
1297 printk(KERN_ERR "%s: failed to allocate buffer "
1298 "for delba frame\n", dev->name);
1299 return;
1300 }
1301
1302 skb_reserve(skb, local->hw.extra_tx_headroom);
1303 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1304 memset(mgmt, 0, 24);
1305 memcpy(mgmt->da, da, ETH_ALEN);
1306 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1307 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1308 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1309 else
1310 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1311 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1312 IEEE80211_STYPE_ACTION);
1313
1314 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1315
1316 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1317 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1318 params = (u16)(initiator << 11); /* bit 11 initiator */
1319 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1320
1321 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1322 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1323
1324 ieee80211_sta_tx(dev, skb, 0);
1325 }
1326
1327 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1328 u16 initiator, u16 reason)
1329 {
1330 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1331 struct ieee80211_hw *hw = &local->hw;
1332 struct sta_info *sta;
1333 int ret, i;
1334
1335 sta = sta_info_get(local, ra);
1336 if (!sta)
1337 return;
1338
1339 /* check if TID is in operational state */
1340 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1341 if (sta->ampdu_mlme.tid_rx[tid].state
1342 != HT_AGG_STATE_OPERATIONAL) {
1343 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1344 sta_info_put(sta);
1345 return;
1346 }
1347 sta->ampdu_mlme.tid_rx[tid].state =
1348 HT_AGG_STATE_REQ_STOP_BA_MSK |
1349 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1350 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1351
1352 /* stop HW Rx aggregation. ampdu_action existence
1353 * already verified in session init so we add the BUG_ON */
1354 BUG_ON(!local->ops->ampdu_action);
1355
1356 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1357 ra, tid, NULL);
1358 if (ret)
1359 printk(KERN_DEBUG "HW problem - can not stop rx "
1360 "aggergation for tid %d\n", tid);
1361
1362 /* shutdown timer has not expired */
1363 if (initiator != WLAN_BACK_TIMER)
1364 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1365 session_timer);
1366
1367 /* check if this is a self generated aggregation halt */
1368 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1369 ieee80211_send_delba(dev, ra, tid, 0, reason);
1370
1371 /* free the reordering buffer */
1372 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1373 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1374 /* release the reordered frames */
1375 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1376 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1377 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1378 }
1379 }
1380 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1381
1382 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1383 sta_info_put(sta);
1384 }
1385
1386
1387 static void ieee80211_sta_process_delba(struct net_device *dev,
1388 struct ieee80211_mgmt *mgmt, size_t len)
1389 {
1390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1391 struct sta_info *sta;
1392 u16 tid, params;
1393 u16 initiator;
1394 DECLARE_MAC_BUF(mac);
1395
1396 sta = sta_info_get(local, mgmt->sa);
1397 if (!sta)
1398 return;
1399
1400 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1401 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1402 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1403
1404 #ifdef CONFIG_MAC80211_HT_DEBUG
1405 if (net_ratelimit())
1406 printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
1407 print_mac(mac, mgmt->sa), tid,
1408 mgmt->u.action.u.delba.reason_code);
1409 #endif /* CONFIG_MAC80211_HT_DEBUG */
1410
1411 if (initiator == WLAN_BACK_INITIATOR)
1412 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1413 WLAN_BACK_INITIATOR, 0);
1414 sta_info_put(sta);
1415 }
1416
1417 /*
1418 * After sending add Block Ack request we activated a timer until
1419 * add Block Ack response will arrive from the recipient.
1420 * If this timer expires sta_addba_resp_timer_expired will be executed.
1421 */
1422 void sta_addba_resp_timer_expired(unsigned long data)
1423 {
1424 /* not an elegant detour, but there is no choice as the timer passes
1425 * only one argument, and both sta_info and TID are needed, so init
1426 * flow in sta_info_add gives the TID as data, while the timer_to_id
1427 * array gives the sta through container_of */
1428 u16 tid = *(int *)data;
1429 struct sta_info *temp_sta = container_of((void *)data,
1430 struct sta_info, timer_to_tid[tid]);
1431
1432 struct ieee80211_local *local = temp_sta->local;
1433 struct ieee80211_hw *hw = &local->hw;
1434 struct sta_info *sta;
1435 u8 *state;
1436
1437 sta = sta_info_get(local, temp_sta->addr);
1438 if (!sta)
1439 return;
1440
1441 state = &sta->ampdu_mlme.tid_tx[tid].state;
1442 /* check if the TID waits for addBA response */
1443 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1444 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1445 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1446 *state = HT_AGG_STATE_IDLE;
1447 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1448 "expecting addBA response there", tid);
1449 goto timer_expired_exit;
1450 }
1451
1452 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1453
1454 /* go through the state check in stop_BA_session */
1455 *state = HT_AGG_STATE_OPERATIONAL;
1456 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1457 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1458 WLAN_BACK_INITIATOR);
1459
1460 timer_expired_exit:
1461 sta_info_put(sta);
1462 }
1463
1464 /*
1465 * After receiving Block Ack Request (BAR) we activated a
1466 * timer after each frame arrives from the originator.
1467 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1468 */
1469 void sta_rx_agg_session_timer_expired(unsigned long data)
1470 {
1471 /* not an elegant detour, but there is no choice as the timer passes
1472 * only one argument, and verious sta_info are needed here, so init
1473 * flow in sta_info_add gives the TID as data, while the timer_to_id
1474 * array gives the sta through container_of */
1475 u8 *ptid = (u8 *)data;
1476 u8 *timer_to_id = ptid - *ptid;
1477 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1478 timer_to_tid[0]);
1479
1480 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1481 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1482 WLAN_BACK_TIMER,
1483 WLAN_REASON_QSTA_TIMEOUT);
1484 }
1485
1486
1487 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1488 struct ieee80211_if_sta *ifsta,
1489 struct ieee80211_mgmt *mgmt,
1490 size_t len)
1491 {
1492 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1493 u16 auth_alg, auth_transaction, status_code;
1494 DECLARE_MAC_BUF(mac);
1495
1496 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1497 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1498 printk(KERN_DEBUG "%s: authentication frame received from "
1499 "%s, but not in authenticate state - ignored\n",
1500 dev->name, print_mac(mac, mgmt->sa));
1501 return;
1502 }
1503
1504 if (len < 24 + 6) {
1505 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1506 "received from %s - ignored\n",
1507 dev->name, len, print_mac(mac, mgmt->sa));
1508 return;
1509 }
1510
1511 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1512 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1513 printk(KERN_DEBUG "%s: authentication frame received from "
1514 "unknown AP (SA=%s BSSID=%s) - "
1515 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1516 print_mac(mac, mgmt->bssid));
1517 return;
1518 }
1519
1520 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1521 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1522 printk(KERN_DEBUG "%s: authentication frame received from "
1523 "unknown BSSID (SA=%s BSSID=%s) - "
1524 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1525 print_mac(mac, mgmt->bssid));
1526 return;
1527 }
1528
1529 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1530 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1531 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1532
1533 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1534 "transaction=%d status=%d)\n",
1535 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1536 auth_transaction, status_code);
1537
1538 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1539 /* IEEE 802.11 standard does not require authentication in IBSS
1540 * networks and most implementations do not seem to use it.
1541 * However, try to reply to authentication attempts if someone
1542 * has actually implemented this.
1543 * TODO: Could implement shared key authentication. */
1544 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1545 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1546 "frame (alg=%d transaction=%d)\n",
1547 dev->name, auth_alg, auth_transaction);
1548 return;
1549 }
1550 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1551 }
1552
1553 if (auth_alg != ifsta->auth_alg ||
1554 auth_transaction != ifsta->auth_transaction) {
1555 printk(KERN_DEBUG "%s: unexpected authentication frame "
1556 "(alg=%d transaction=%d)\n",
1557 dev->name, auth_alg, auth_transaction);
1558 return;
1559 }
1560
1561 if (status_code != WLAN_STATUS_SUCCESS) {
1562 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1563 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1564 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1565 u8 algs[3];
1566 const int num_algs = ARRAY_SIZE(algs);
1567 int i, pos;
1568 algs[0] = algs[1] = algs[2] = 0xff;
1569 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1570 algs[0] = WLAN_AUTH_OPEN;
1571 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1572 algs[1] = WLAN_AUTH_SHARED_KEY;
1573 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1574 algs[2] = WLAN_AUTH_LEAP;
1575 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1576 pos = 0;
1577 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1578 pos = 1;
1579 else
1580 pos = 2;
1581 for (i = 0; i < num_algs; i++) {
1582 pos++;
1583 if (pos >= num_algs)
1584 pos = 0;
1585 if (algs[pos] == ifsta->auth_alg ||
1586 algs[pos] == 0xff)
1587 continue;
1588 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1589 !ieee80211_sta_wep_configured(dev))
1590 continue;
1591 ifsta->auth_alg = algs[pos];
1592 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1593 "next try\n",
1594 dev->name, ifsta->auth_alg);
1595 break;
1596 }
1597 }
1598 return;
1599 }
1600
1601 switch (ifsta->auth_alg) {
1602 case WLAN_AUTH_OPEN:
1603 case WLAN_AUTH_LEAP:
1604 ieee80211_auth_completed(dev, ifsta);
1605 break;
1606 case WLAN_AUTH_SHARED_KEY:
1607 if (ifsta->auth_transaction == 4)
1608 ieee80211_auth_completed(dev, ifsta);
1609 else
1610 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1611 break;
1612 }
1613 }
1614
1615
1616 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1617 struct ieee80211_if_sta *ifsta,
1618 struct ieee80211_mgmt *mgmt,
1619 size_t len)
1620 {
1621 u16 reason_code;
1622 DECLARE_MAC_BUF(mac);
1623
1624 if (len < 24 + 2) {
1625 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1626 "received from %s - ignored\n",
1627 dev->name, len, print_mac(mac, mgmt->sa));
1628 return;
1629 }
1630
1631 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1632 printk(KERN_DEBUG "%s: deauthentication frame received from "
1633 "unknown AP (SA=%s BSSID=%s) - "
1634 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1635 print_mac(mac, mgmt->bssid));
1636 return;
1637 }
1638
1639 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1640
1641 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1642 " (reason=%d)\n",
1643 dev->name, print_mac(mac, mgmt->sa), reason_code);
1644
1645 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1646 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1647 }
1648
1649 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1650 ifsta->state == IEEE80211_ASSOCIATE ||
1651 ifsta->state == IEEE80211_ASSOCIATED) {
1652 ifsta->state = IEEE80211_AUTHENTICATE;
1653 mod_timer(&ifsta->timer, jiffies +
1654 IEEE80211_RETRY_AUTH_INTERVAL);
1655 }
1656
1657 ieee80211_set_disassoc(dev, ifsta, 1);
1658 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1659 }
1660
1661
1662 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1663 struct ieee80211_if_sta *ifsta,
1664 struct ieee80211_mgmt *mgmt,
1665 size_t len)
1666 {
1667 u16 reason_code;
1668 DECLARE_MAC_BUF(mac);
1669
1670 if (len < 24 + 2) {
1671 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1672 "received from %s - ignored\n",
1673 dev->name, len, print_mac(mac, mgmt->sa));
1674 return;
1675 }
1676
1677 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1678 printk(KERN_DEBUG "%s: disassociation frame received from "
1679 "unknown AP (SA=%s BSSID=%s) - "
1680 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1681 print_mac(mac, mgmt->bssid));
1682 return;
1683 }
1684
1685 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1686
1687 printk(KERN_DEBUG "%s: RX disassociation from %s"
1688 " (reason=%d)\n",
1689 dev->name, print_mac(mac, mgmt->sa), reason_code);
1690
1691 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1692 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1693
1694 if (ifsta->state == IEEE80211_ASSOCIATED) {
1695 ifsta->state = IEEE80211_ASSOCIATE;
1696 mod_timer(&ifsta->timer, jiffies +
1697 IEEE80211_RETRY_AUTH_INTERVAL);
1698 }
1699
1700 ieee80211_set_disassoc(dev, ifsta, 0);
1701 }
1702
1703
1704 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1705 struct ieee80211_if_sta *ifsta,
1706 struct ieee80211_mgmt *mgmt,
1707 size_t len,
1708 int reassoc)
1709 {
1710 struct ieee80211_local *local = sdata->local;
1711 struct net_device *dev = sdata->dev;
1712 struct ieee80211_hw_mode *mode;
1713 struct sta_info *sta;
1714 u32 rates;
1715 u16 capab_info, status_code, aid;
1716 struct ieee802_11_elems elems;
1717 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1718 u8 *pos;
1719 int i, j;
1720 DECLARE_MAC_BUF(mac);
1721
1722 /* AssocResp and ReassocResp have identical structure, so process both
1723 * of them in this function. */
1724
1725 if (ifsta->state != IEEE80211_ASSOCIATE) {
1726 printk(KERN_DEBUG "%s: association frame received from "
1727 "%s, but not in associate state - ignored\n",
1728 dev->name, print_mac(mac, mgmt->sa));
1729 return;
1730 }
1731
1732 if (len < 24 + 6) {
1733 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1734 "received from %s - ignored\n",
1735 dev->name, len, print_mac(mac, mgmt->sa));
1736 return;
1737 }
1738
1739 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1740 printk(KERN_DEBUG "%s: association frame received from "
1741 "unknown AP (SA=%s BSSID=%s) - "
1742 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1743 print_mac(mac, mgmt->bssid));
1744 return;
1745 }
1746
1747 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1748 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1749 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1750
1751 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1752 "status=%d aid=%d)\n",
1753 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1754 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1755
1756 if (status_code != WLAN_STATUS_SUCCESS) {
1757 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1758 dev->name, status_code);
1759 /* if this was a reassociation, ensure we try a "full"
1760 * association next time. This works around some broken APs
1761 * which do not correctly reject reassociation requests. */
1762 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1763 return;
1764 }
1765
1766 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1767 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1768 "set\n", dev->name, aid);
1769 aid &= ~(BIT(15) | BIT(14));
1770
1771 pos = mgmt->u.assoc_resp.variable;
1772 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1773
1774 if (!elems.supp_rates) {
1775 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1776 dev->name);
1777 return;
1778 }
1779
1780 printk(KERN_DEBUG "%s: associated\n", dev->name);
1781 ifsta->aid = aid;
1782 ifsta->ap_capab = capab_info;
1783
1784 kfree(ifsta->assocresp_ies);
1785 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1786 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1787 if (ifsta->assocresp_ies)
1788 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1789
1790 /* set AID, ieee80211_set_associated() will tell the driver */
1791 bss_conf->aid = aid;
1792 ieee80211_set_associated(dev, ifsta, 1);
1793
1794 /* Add STA entry for the AP */
1795 sta = sta_info_get(local, ifsta->bssid);
1796 if (!sta) {
1797 struct ieee80211_sta_bss *bss;
1798 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1799 if (!sta) {
1800 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1801 " AP\n", dev->name);
1802 return;
1803 }
1804 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1805 local->hw.conf.channel,
1806 ifsta->ssid, ifsta->ssid_len);
1807 if (bss) {
1808 sta->last_rssi = bss->rssi;
1809 sta->last_signal = bss->signal;
1810 sta->last_noise = bss->noise;
1811 ieee80211_rx_bss_put(dev, bss);
1812 }
1813 }
1814
1815 sta->dev = dev;
1816 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1817
1818 rates = 0;
1819 mode = local->oper_hw_mode;
1820 for (i = 0; i < elems.supp_rates_len; i++) {
1821 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1822 for (j = 0; j < mode->num_rates; j++)
1823 if (mode->rates[j].rate == rate)
1824 rates |= BIT(j);
1825 }
1826 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1827 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1828 for (j = 0; j < mode->num_rates; j++)
1829 if (mode->rates[j].rate == rate)
1830 rates |= BIT(j);
1831 }
1832 sta->supp_rates = rates;
1833
1834 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1835 local->ops->conf_ht) {
1836 struct ieee80211_ht_bss_info bss_info;
1837
1838 ieee80211_ht_cap_ie_to_ht_info(
1839 (struct ieee80211_ht_cap *)
1840 elems.ht_cap_elem, &sta->ht_info);
1841 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1842 (struct ieee80211_ht_addt_info *)
1843 elems.ht_info_elem, &bss_info);
1844 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1845 }
1846
1847 rate_control_rate_init(sta, local);
1848
1849 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1850 sta->flags |= WLAN_STA_WME;
1851 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1852 elems.wmm_param_len);
1853 }
1854
1855
1856 sta_info_put(sta);
1857
1858 ieee80211_associated(dev, ifsta);
1859 }
1860
1861
1862 /* Caller must hold local->sta_bss_lock */
1863 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1864 struct ieee80211_sta_bss *bss)
1865 {
1866 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1867 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1868 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1869 }
1870
1871
1872 /* Caller must hold local->sta_bss_lock */
1873 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1874 struct ieee80211_sta_bss *bss)
1875 {
1876 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1877 struct ieee80211_sta_bss *b, *prev = NULL;
1878 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1879 while (b) {
1880 if (b == bss) {
1881 if (!prev)
1882 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1883 bss->hnext;
1884 else
1885 prev->hnext = bss->hnext;
1886 break;
1887 }
1888 prev = b;
1889 b = b->hnext;
1890 }
1891 }
1892
1893
1894 static struct ieee80211_sta_bss *
1895 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1896 u8 *ssid, u8 ssid_len)
1897 {
1898 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1899 struct ieee80211_sta_bss *bss;
1900
1901 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1902 if (!bss)
1903 return NULL;
1904 atomic_inc(&bss->users);
1905 atomic_inc(&bss->users);
1906 memcpy(bss->bssid, bssid, ETH_ALEN);
1907 bss->channel = channel;
1908 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1909 memcpy(bss->ssid, ssid, ssid_len);
1910 bss->ssid_len = ssid_len;
1911 }
1912
1913 spin_lock_bh(&local->sta_bss_lock);
1914 /* TODO: order by RSSI? */
1915 list_add_tail(&bss->list, &local->sta_bss_list);
1916 __ieee80211_rx_bss_hash_add(dev, bss);
1917 spin_unlock_bh(&local->sta_bss_lock);
1918 return bss;
1919 }
1920
1921
1922 static struct ieee80211_sta_bss *
1923 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1924 u8 *ssid, u8 ssid_len)
1925 {
1926 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1927 struct ieee80211_sta_bss *bss;
1928
1929 spin_lock_bh(&local->sta_bss_lock);
1930 bss = local->sta_bss_hash[STA_HASH(bssid)];
1931 while (bss) {
1932 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1933 bss->channel == channel &&
1934 bss->ssid_len == ssid_len &&
1935 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1936 atomic_inc(&bss->users);
1937 break;
1938 }
1939 bss = bss->hnext;
1940 }
1941 spin_unlock_bh(&local->sta_bss_lock);
1942 return bss;
1943 }
1944
1945
1946 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1947 {
1948 kfree(bss->wpa_ie);
1949 kfree(bss->rsn_ie);
1950 kfree(bss->wmm_ie);
1951 kfree(bss->ht_ie);
1952 kfree(bss);
1953 }
1954
1955
1956 static void ieee80211_rx_bss_put(struct net_device *dev,
1957 struct ieee80211_sta_bss *bss)
1958 {
1959 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1960 if (!atomic_dec_and_test(&bss->users))
1961 return;
1962
1963 spin_lock_bh(&local->sta_bss_lock);
1964 __ieee80211_rx_bss_hash_del(dev, bss);
1965 list_del(&bss->list);
1966 spin_unlock_bh(&local->sta_bss_lock);
1967 ieee80211_rx_bss_free(bss);
1968 }
1969
1970
1971 void ieee80211_rx_bss_list_init(struct net_device *dev)
1972 {
1973 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1974 spin_lock_init(&local->sta_bss_lock);
1975 INIT_LIST_HEAD(&local->sta_bss_list);
1976 }
1977
1978
1979 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1980 {
1981 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1982 struct ieee80211_sta_bss *bss, *tmp;
1983
1984 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1985 ieee80211_rx_bss_put(dev, bss);
1986 }
1987
1988
1989 static void ieee80211_rx_bss_info(struct net_device *dev,
1990 struct ieee80211_mgmt *mgmt,
1991 size_t len,
1992 struct ieee80211_rx_status *rx_status,
1993 int beacon)
1994 {
1995 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1996 struct ieee802_11_elems elems;
1997 size_t baselen;
1998 int channel, clen;
1999 struct ieee80211_sta_bss *bss;
2000 struct sta_info *sta;
2001 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2002 u64 timestamp;
2003 DECLARE_MAC_BUF(mac);
2004 DECLARE_MAC_BUF(mac2);
2005
2006 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2007 return; /* ignore ProbeResp to foreign address */
2008
2009 #if 0
2010 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2011 dev->name, beacon ? "Beacon" : "Probe Response",
2012 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2013 #endif
2014
2015 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2016 if (baselen > len)
2017 return;
2018
2019 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2020
2021 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2022 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2023 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2024 static unsigned long last_tsf_debug = 0;
2025 u64 tsf;
2026 if (local->ops->get_tsf)
2027 tsf = local->ops->get_tsf(local_to_hw(local));
2028 else
2029 tsf = -1LLU;
2030 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2031 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2032 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2033 "@%lu\n",
2034 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2035 (unsigned long long)tsf,
2036 (unsigned long long)timestamp,
2037 (unsigned long long)(tsf - timestamp),
2038 jiffies);
2039 last_tsf_debug = jiffies;
2040 }
2041 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2042 }
2043
2044 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2045
2046 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2047 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2048 (sta = sta_info_get(local, mgmt->sa))) {
2049 struct ieee80211_hw_mode *mode;
2050 struct ieee80211_rate *rates;
2051 size_t num_rates;
2052 u32 supp_rates, prev_rates;
2053 int i, j;
2054
2055 mode = local->sta_sw_scanning ?
2056 local->scan_hw_mode : local->oper_hw_mode;
2057
2058 if (local->sta_hw_scanning) {
2059 /* search for the correct mode matches the beacon */
2060 list_for_each_entry(mode, &local->modes_list, list)
2061 if (mode->mode == rx_status->phymode)
2062 break;
2063
2064 if (mode == NULL)
2065 mode = local->oper_hw_mode;
2066 }
2067 rates = mode->rates;
2068 num_rates = mode->num_rates;
2069
2070 supp_rates = 0;
2071 for (i = 0; i < elems.supp_rates_len +
2072 elems.ext_supp_rates_len; i++) {
2073 u8 rate = 0;
2074 int own_rate;
2075 if (i < elems.supp_rates_len)
2076 rate = elems.supp_rates[i];
2077 else if (elems.ext_supp_rates)
2078 rate = elems.ext_supp_rates
2079 [i - elems.supp_rates_len];
2080 own_rate = 5 * (rate & 0x7f);
2081 for (j = 0; j < num_rates; j++)
2082 if (rates[j].rate == own_rate)
2083 supp_rates |= BIT(j);
2084 }
2085
2086 prev_rates = sta->supp_rates;
2087 sta->supp_rates &= supp_rates;
2088 if (sta->supp_rates == 0) {
2089 /* No matching rates - this should not really happen.
2090 * Make sure that at least one rate is marked
2091 * supported to avoid issues with TX rate ctrl. */
2092 sta->supp_rates = sdata->u.sta.supp_rates_bits;
2093 }
2094 if (sta->supp_rates != prev_rates) {
2095 printk(KERN_DEBUG "%s: updated supp_rates set for "
2096 "%s based on beacon info (0x%x & 0x%x -> "
2097 "0x%x)\n",
2098 dev->name, print_mac(mac, sta->addr), prev_rates,
2099 supp_rates, sta->supp_rates);
2100 }
2101 sta_info_put(sta);
2102 }
2103
2104 if (!elems.ssid)
2105 return;
2106
2107 if (elems.ds_params && elems.ds_params_len == 1)
2108 channel = elems.ds_params[0];
2109 else
2110 channel = rx_status->channel;
2111
2112 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
2113 elems.ssid, elems.ssid_len);
2114 if (!bss) {
2115 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
2116 elems.ssid, elems.ssid_len);
2117 if (!bss)
2118 return;
2119 } else {
2120 #if 0
2121 /* TODO: order by RSSI? */
2122 spin_lock_bh(&local->sta_bss_lock);
2123 list_move_tail(&bss->list, &local->sta_bss_list);
2124 spin_unlock_bh(&local->sta_bss_lock);
2125 #endif
2126 }
2127
2128 if (bss->probe_resp && beacon) {
2129 /* Do not allow beacon to override data from Probe Response. */
2130 ieee80211_rx_bss_put(dev, bss);
2131 return;
2132 }
2133
2134 /* save the ERP value so that it is available at association time */
2135 if (elems.erp_info && elems.erp_info_len >= 1) {
2136 bss->erp_value = elems.erp_info[0];
2137 bss->has_erp_value = 1;
2138 }
2139
2140 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2141 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2142
2143 bss->supp_rates_len = 0;
2144 if (elems.supp_rates) {
2145 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2146 if (clen > elems.supp_rates_len)
2147 clen = elems.supp_rates_len;
2148 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2149 clen);
2150 bss->supp_rates_len += clen;
2151 }
2152 if (elems.ext_supp_rates) {
2153 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2154 if (clen > elems.ext_supp_rates_len)
2155 clen = elems.ext_supp_rates_len;
2156 memcpy(&bss->supp_rates[bss->supp_rates_len],
2157 elems.ext_supp_rates, clen);
2158 bss->supp_rates_len += clen;
2159 }
2160
2161 if (elems.wpa &&
2162 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2163 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2164 kfree(bss->wpa_ie);
2165 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2166 if (bss->wpa_ie) {
2167 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2168 bss->wpa_ie_len = elems.wpa_len + 2;
2169 } else
2170 bss->wpa_ie_len = 0;
2171 } else if (!elems.wpa && bss->wpa_ie) {
2172 kfree(bss->wpa_ie);
2173 bss->wpa_ie = NULL;
2174 bss->wpa_ie_len = 0;
2175 }
2176
2177 if (elems.rsn &&
2178 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2179 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2180 kfree(bss->rsn_ie);
2181 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2182 if (bss->rsn_ie) {
2183 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2184 bss->rsn_ie_len = elems.rsn_len + 2;
2185 } else
2186 bss->rsn_ie_len = 0;
2187 } else if (!elems.rsn && bss->rsn_ie) {
2188 kfree(bss->rsn_ie);
2189 bss->rsn_ie = NULL;
2190 bss->rsn_ie_len = 0;
2191 }
2192
2193 if (elems.wmm_param &&
2194 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2195 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2196 kfree(bss->wmm_ie);
2197 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2198 if (bss->wmm_ie) {
2199 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2200 elems.wmm_param_len + 2);
2201 bss->wmm_ie_len = elems.wmm_param_len + 2;
2202 } else
2203 bss->wmm_ie_len = 0;
2204 } else if (!elems.wmm_param && bss->wmm_ie) {
2205 kfree(bss->wmm_ie);
2206 bss->wmm_ie = NULL;
2207 bss->wmm_ie_len = 0;
2208 }
2209 if (elems.ht_cap_elem &&
2210 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2211 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2212 kfree(bss->ht_ie);
2213 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2214 if (bss->ht_ie) {
2215 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2216 elems.ht_cap_elem_len + 2);
2217 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2218 } else
2219 bss->ht_ie_len = 0;
2220 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2221 kfree(bss->ht_ie);
2222 bss->ht_ie = NULL;
2223 bss->ht_ie_len = 0;
2224 }
2225
2226 bss->hw_mode = rx_status->phymode;
2227 bss->freq = rx_status->freq;
2228 if (channel != rx_status->channel &&
2229 (bss->hw_mode == MODE_IEEE80211G ||
2230 bss->hw_mode == MODE_IEEE80211B) &&
2231 channel >= 1 && channel <= 14) {
2232 static const int freq_list[] = {
2233 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2234 2447, 2452, 2457, 2462, 2467, 2472, 2484
2235 };
2236 /* IEEE 802.11g/b mode can receive packets from neighboring
2237 * channels, so map the channel into frequency. */
2238 bss->freq = freq_list[channel - 1];
2239 }
2240 bss->timestamp = timestamp;
2241 bss->last_update = jiffies;
2242 bss->rssi = rx_status->ssi;
2243 bss->signal = rx_status->signal;
2244 bss->noise = rx_status->noise;
2245 if (!beacon)
2246 bss->probe_resp++;
2247 ieee80211_rx_bss_put(dev, bss);
2248 }
2249
2250
2251 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2252 struct ieee80211_mgmt *mgmt,
2253 size_t len,
2254 struct ieee80211_rx_status *rx_status)
2255 {
2256 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2257 }
2258
2259
2260 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2261 struct ieee80211_mgmt *mgmt,
2262 size_t len,
2263 struct ieee80211_rx_status *rx_status)
2264 {
2265 struct ieee80211_sub_if_data *sdata;
2266 struct ieee80211_if_sta *ifsta;
2267 size_t baselen;
2268 struct ieee802_11_elems elems;
2269 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2270 struct ieee80211_conf *conf = &local->hw.conf;
2271 u32 changed = 0;
2272
2273 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2274
2275 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2276 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2277 return;
2278 ifsta = &sdata->u.sta;
2279
2280 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2281 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2282 return;
2283
2284 /* Process beacon from the current BSS */
2285 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2286 if (baselen > len)
2287 return;
2288
2289 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2290
2291 if (elems.erp_info && elems.erp_info_len >= 1)
2292 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2293
2294 if (elems.ht_cap_elem && elems.ht_info_elem &&
2295 elems.wmm_param && local->ops->conf_ht &&
2296 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2297 struct ieee80211_ht_bss_info bss_info;
2298
2299 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2300 (struct ieee80211_ht_addt_info *)
2301 elems.ht_info_elem, &bss_info);
2302 /* check if AP changed bss inforamation */
2303 if ((conf->ht_bss_conf.primary_channel !=
2304 bss_info.primary_channel) ||
2305 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2306 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2307 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2308 &bss_info);
2309 }
2310
2311 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2312 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2313 elems.wmm_param_len);
2314 }
2315
2316 ieee80211_bss_info_change_notify(sdata, changed);
2317 }
2318
2319
2320 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2321 struct ieee80211_if_sta *ifsta,
2322 struct ieee80211_mgmt *mgmt,
2323 size_t len,
2324 struct ieee80211_rx_status *rx_status)
2325 {
2326 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2327 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2328 int tx_last_beacon;
2329 struct sk_buff *skb;
2330 struct ieee80211_mgmt *resp;
2331 u8 *pos, *end;
2332 DECLARE_MAC_BUF(mac);
2333 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2334 DECLARE_MAC_BUF(mac2);
2335 DECLARE_MAC_BUF(mac3);
2336 #endif
2337
2338 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2339 ifsta->state != IEEE80211_IBSS_JOINED ||
2340 len < 24 + 2 || !ifsta->probe_resp)
2341 return;
2342
2343 if (local->ops->tx_last_beacon)
2344 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2345 else
2346 tx_last_beacon = 1;
2347
2348 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2349 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2350 "%s (tx_last_beacon=%d)\n",
2351 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2352 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2353 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2354
2355 if (!tx_last_beacon)
2356 return;
2357
2358 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2359 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2360 return;
2361
2362 end = ((u8 *) mgmt) + len;
2363 pos = mgmt->u.probe_req.variable;
2364 if (pos[0] != WLAN_EID_SSID ||
2365 pos + 2 + pos[1] > end) {
2366 if (net_ratelimit()) {
2367 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2368 "from %s\n",
2369 dev->name, print_mac(mac, mgmt->sa));
2370 }
2371 return;
2372 }
2373 if (pos[1] != 0 &&
2374 (pos[1] != ifsta->ssid_len ||
2375 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2376 /* Ignore ProbeReq for foreign SSID */
2377 return;
2378 }
2379
2380 /* Reply with ProbeResp */
2381 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2382 if (!skb)
2383 return;
2384
2385 resp = (struct ieee80211_mgmt *) skb->data;
2386 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2387 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2388 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2389 dev->name, print_mac(mac, resp->da));
2390 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2391 ieee80211_sta_tx(dev, skb, 0);
2392 }
2393
2394 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2395 struct ieee80211_if_sta *ifsta,
2396 struct ieee80211_mgmt *mgmt,
2397 size_t len)
2398 {
2399 if (len < IEEE80211_MIN_ACTION_SIZE)
2400 return;
2401
2402 switch (mgmt->u.action.category) {
2403 case WLAN_CATEGORY_BACK:
2404 switch (mgmt->u.action.u.addba_req.action_code) {
2405 case WLAN_ACTION_ADDBA_REQ:
2406 if (len < (IEEE80211_MIN_ACTION_SIZE +
2407 sizeof(mgmt->u.action.u.addba_req)))
2408 break;
2409 ieee80211_sta_process_addba_request(dev, mgmt, len);
2410 break;
2411 case WLAN_ACTION_ADDBA_RESP:
2412 if (len < (IEEE80211_MIN_ACTION_SIZE +
2413 sizeof(mgmt->u.action.u.addba_resp)))
2414 break;
2415 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2416 break;
2417 case WLAN_ACTION_DELBA:
2418 if (len < (IEEE80211_MIN_ACTION_SIZE +
2419 sizeof(mgmt->u.action.u.delba)))
2420 break;
2421 ieee80211_sta_process_delba(dev, mgmt, len);
2422 break;
2423 default:
2424 if (net_ratelimit())
2425 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2426 dev->name);
2427 break;
2428 }
2429 break;
2430 default:
2431 break;
2432 }
2433 }
2434
2435 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2436 struct ieee80211_rx_status *rx_status)
2437 {
2438 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2439 struct ieee80211_sub_if_data *sdata;
2440 struct ieee80211_if_sta *ifsta;
2441 struct ieee80211_mgmt *mgmt;
2442 u16 fc;
2443
2444 if (skb->len < 24)
2445 goto fail;
2446
2447 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2448 ifsta = &sdata->u.sta;
2449
2450 mgmt = (struct ieee80211_mgmt *) skb->data;
2451 fc = le16_to_cpu(mgmt->frame_control);
2452
2453 switch (fc & IEEE80211_FCTL_STYPE) {
2454 case IEEE80211_STYPE_PROBE_REQ:
2455 case IEEE80211_STYPE_PROBE_RESP:
2456 case IEEE80211_STYPE_BEACON:
2457 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2458 case IEEE80211_STYPE_AUTH:
2459 case IEEE80211_STYPE_ASSOC_RESP:
2460 case IEEE80211_STYPE_REASSOC_RESP:
2461 case IEEE80211_STYPE_DEAUTH:
2462 case IEEE80211_STYPE_DISASSOC:
2463 case IEEE80211_STYPE_ACTION:
2464 skb_queue_tail(&ifsta->skb_queue, skb);
2465 queue_work(local->hw.workqueue, &ifsta->work);
2466 return;
2467 default:
2468 printk(KERN_DEBUG "%s: received unknown management frame - "
2469 "stype=%d\n", dev->name,
2470 (fc & IEEE80211_FCTL_STYPE) >> 4);
2471 break;
2472 }
2473
2474 fail:
2475 kfree_skb(skb);
2476 }
2477
2478
2479 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2480 struct sk_buff *skb)
2481 {
2482 struct ieee80211_rx_status *rx_status;
2483 struct ieee80211_sub_if_data *sdata;
2484 struct ieee80211_if_sta *ifsta;
2485 struct ieee80211_mgmt *mgmt;
2486 u16 fc;
2487
2488 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2489 ifsta = &sdata->u.sta;
2490
2491 rx_status = (struct ieee80211_rx_status *) skb->cb;
2492 mgmt = (struct ieee80211_mgmt *) skb->data;
2493 fc = le16_to_cpu(mgmt->frame_control);
2494
2495 switch (fc & IEEE80211_FCTL_STYPE) {
2496 case IEEE80211_STYPE_PROBE_REQ:
2497 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2498 rx_status);
2499 break;
2500 case IEEE80211_STYPE_PROBE_RESP:
2501 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2502 break;
2503 case IEEE80211_STYPE_BEACON:
2504 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2505 break;
2506 case IEEE80211_STYPE_AUTH:
2507 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2508 break;
2509 case IEEE80211_STYPE_ASSOC_RESP:
2510 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2511 break;
2512 case IEEE80211_STYPE_REASSOC_RESP:
2513 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2514 break;
2515 case IEEE80211_STYPE_DEAUTH:
2516 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2517 break;
2518 case IEEE80211_STYPE_DISASSOC:
2519 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2520 break;
2521 case IEEE80211_STYPE_ACTION:
2522 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2523 break;
2524 }
2525
2526 kfree_skb(skb);
2527 }
2528
2529
2530 ieee80211_txrx_result
2531 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2532 struct ieee80211_rx_status *rx_status)
2533 {
2534 struct ieee80211_mgmt *mgmt;
2535 u16 fc;
2536
2537 if (skb->len < 2)
2538 return TXRX_DROP;
2539
2540 mgmt = (struct ieee80211_mgmt *) skb->data;
2541 fc = le16_to_cpu(mgmt->frame_control);
2542
2543 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2544 return TXRX_CONTINUE;
2545
2546 if (skb->len < 24)
2547 return TXRX_DROP;
2548
2549 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2550 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2551 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2552 skb->len, rx_status);
2553 dev_kfree_skb(skb);
2554 return TXRX_QUEUED;
2555 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2556 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2557 rx_status);
2558 dev_kfree_skb(skb);
2559 return TXRX_QUEUED;
2560 }
2561 }
2562 return TXRX_CONTINUE;
2563 }
2564
2565
2566 static int ieee80211_sta_active_ibss(struct net_device *dev)
2567 {
2568 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2569 int active = 0;
2570 struct sta_info *sta;
2571
2572 read_lock_bh(&local->sta_lock);
2573 list_for_each_entry(sta, &local->sta_list, list) {
2574 if (sta->dev == dev &&
2575 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2576 jiffies)) {
2577 active++;
2578 break;
2579 }
2580 }
2581 read_unlock_bh(&local->sta_lock);
2582
2583 return active;
2584 }
2585
2586
2587 static void ieee80211_sta_expire(struct net_device *dev)
2588 {
2589 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2590 struct sta_info *sta, *tmp;
2591 LIST_HEAD(tmp_list);
2592 DECLARE_MAC_BUF(mac);
2593
2594 write_lock_bh(&local->sta_lock);
2595 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2596 if (time_after(jiffies, sta->last_rx +
2597 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2598 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2599 dev->name, print_mac(mac, sta->addr));
2600 __sta_info_get(sta);
2601 sta_info_remove(sta);
2602 list_add(&sta->list, &tmp_list);
2603 }
2604 write_unlock_bh(&local->sta_lock);
2605
2606 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2607 sta_info_free(sta);
2608 sta_info_put(sta);
2609 }
2610 }
2611
2612
2613 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2614 struct ieee80211_if_sta *ifsta)
2615 {
2616 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2617
2618 ieee80211_sta_expire(dev);
2619 if (ieee80211_sta_active_ibss(dev))
2620 return;
2621
2622 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2623 "IBSS networks with same SSID (merge)\n", dev->name);
2624 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2625 }
2626
2627
2628 void ieee80211_sta_timer(unsigned long data)
2629 {
2630 struct ieee80211_sub_if_data *sdata =
2631 (struct ieee80211_sub_if_data *) data;
2632 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2633 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2634
2635 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2636 queue_work(local->hw.workqueue, &ifsta->work);
2637 }
2638
2639
2640 void ieee80211_sta_work(struct work_struct *work)
2641 {
2642 struct ieee80211_sub_if_data *sdata =
2643 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2644 struct net_device *dev = sdata->dev;
2645 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2646 struct ieee80211_if_sta *ifsta;
2647 struct sk_buff *skb;
2648
2649 if (!netif_running(dev))
2650 return;
2651
2652 if (local->sta_sw_scanning || local->sta_hw_scanning)
2653 return;
2654
2655 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2656 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2657 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2658 "(type=%d)\n", dev->name, sdata->vif.type);
2659 return;
2660 }
2661 ifsta = &sdata->u.sta;
2662
2663 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2664 ieee80211_sta_rx_queued_mgmt(dev, skb);
2665
2666 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2667 ifsta->state != IEEE80211_ASSOCIATE &&
2668 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2669 if (ifsta->scan_ssid_len)
2670 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2671 else
2672 ieee80211_sta_start_scan(dev, NULL, 0);
2673 return;
2674 }
2675
2676 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2677 if (ieee80211_sta_config_auth(dev, ifsta))
2678 return;
2679 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2680 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2681 return;
2682
2683 switch (ifsta->state) {
2684 case IEEE80211_DISABLED:
2685 break;
2686 case IEEE80211_AUTHENTICATE:
2687 ieee80211_authenticate(dev, ifsta);
2688 break;
2689 case IEEE80211_ASSOCIATE:
2690 ieee80211_associate(dev, ifsta);
2691 break;
2692 case IEEE80211_ASSOCIATED:
2693 ieee80211_associated(dev, ifsta);
2694 break;
2695 case IEEE80211_IBSS_SEARCH:
2696 ieee80211_sta_find_ibss(dev, ifsta);
2697 break;
2698 case IEEE80211_IBSS_JOINED:
2699 ieee80211_sta_merge_ibss(dev, ifsta);
2700 break;
2701 default:
2702 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2703 ifsta->state);
2704 break;
2705 }
2706
2707 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2708 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2709 "mixed-cell disabled - disassociate\n", dev->name);
2710
2711 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2712 ieee80211_set_disassoc(dev, ifsta, 0);
2713 }
2714 }
2715
2716
2717 static void ieee80211_sta_reset_auth(struct net_device *dev,
2718 struct ieee80211_if_sta *ifsta)
2719 {
2720 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2721
2722 if (local->ops->reset_tsf) {
2723 /* Reset own TSF to allow time synchronization work. */
2724 local->ops->reset_tsf(local_to_hw(local));
2725 }
2726
2727 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2728
2729
2730 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2731 ifsta->auth_alg = WLAN_AUTH_OPEN;
2732 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2733 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2734 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2735 ifsta->auth_alg = WLAN_AUTH_LEAP;
2736 else
2737 ifsta->auth_alg = WLAN_AUTH_OPEN;
2738 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2739 ifsta->auth_alg);
2740 ifsta->auth_transaction = -1;
2741 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2742 ifsta->auth_tries = ifsta->assoc_tries = 0;
2743 netif_carrier_off(dev);
2744 }
2745
2746
2747 void ieee80211_sta_req_auth(struct net_device *dev,
2748 struct ieee80211_if_sta *ifsta)
2749 {
2750 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2751 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2752
2753 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2754 return;
2755
2756 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2757 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2758 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2759 IEEE80211_STA_AUTO_SSID_SEL))) {
2760 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2761 queue_work(local->hw.workqueue, &ifsta->work);
2762 }
2763 }
2764
2765 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2766 const char *ssid, int ssid_len)
2767 {
2768 int tmp, hidden_ssid;
2769
2770 if (ssid_len == ifsta->ssid_len &&
2771 !memcmp(ifsta->ssid, ssid, ssid_len))
2772 return 1;
2773
2774 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2775 return 0;
2776
2777 hidden_ssid = 1;
2778 tmp = ssid_len;
2779 while (tmp--) {
2780 if (ssid[tmp] != '\0') {
2781 hidden_ssid = 0;
2782 break;
2783 }
2784 }
2785
2786 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2787 return 1;
2788
2789 if (ssid_len == 1 && ssid[0] == ' ')
2790 return 1;
2791
2792 return 0;
2793 }
2794
2795 static int ieee80211_sta_config_auth(struct net_device *dev,
2796 struct ieee80211_if_sta *ifsta)
2797 {
2798 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2799 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2800 struct ieee80211_sta_bss *bss, *selected = NULL;
2801 int top_rssi = 0, freq;
2802
2803 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2804 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2805 ifsta->state = IEEE80211_AUTHENTICATE;
2806 ieee80211_sta_reset_auth(dev, ifsta);
2807 return 0;
2808 }
2809
2810 spin_lock_bh(&local->sta_bss_lock);
2811 freq = local->oper_channel->freq;
2812 list_for_each_entry(bss, &local->sta_bss_list, list) {
2813 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2814 continue;
2815
2816 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2817 !!sdata->default_key)
2818 continue;
2819
2820 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2821 bss->freq != freq)
2822 continue;
2823
2824 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2825 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2826 continue;
2827
2828 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2829 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2830 continue;
2831
2832 if (!selected || top_rssi < bss->rssi) {
2833 selected = bss;
2834 top_rssi = bss->rssi;
2835 }
2836 }
2837 if (selected)
2838 atomic_inc(&selected->users);
2839 spin_unlock_bh(&local->sta_bss_lock);
2840
2841 if (selected) {
2842 ieee80211_set_channel(local, -1, selected->freq);
2843 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2844 ieee80211_sta_set_ssid(dev, selected->ssid,
2845 selected->ssid_len);
2846 ieee80211_sta_set_bssid(dev, selected->bssid);
2847 ieee80211_rx_bss_put(dev, selected);
2848 ifsta->state = IEEE80211_AUTHENTICATE;
2849 ieee80211_sta_reset_auth(dev, ifsta);
2850 return 0;
2851 } else {
2852 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2853 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2854 ieee80211_sta_start_scan(dev, NULL, 0);
2855 else
2856 ieee80211_sta_start_scan(dev, ifsta->ssid,
2857 ifsta->ssid_len);
2858 ifsta->state = IEEE80211_AUTHENTICATE;
2859 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2860 } else
2861 ifsta->state = IEEE80211_DISABLED;
2862 }
2863 return -1;
2864 }
2865
2866 static int ieee80211_sta_join_ibss(struct net_device *dev,
2867 struct ieee80211_if_sta *ifsta,
2868 struct ieee80211_sta_bss *bss)
2869 {
2870 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2871 int res, rates, i, j;
2872 struct sk_buff *skb;
2873 struct ieee80211_mgmt *mgmt;
2874 struct ieee80211_tx_control control;
2875 struct ieee80211_hw_mode *mode;
2876 struct rate_selection ratesel;
2877 u8 *pos;
2878 struct ieee80211_sub_if_data *sdata;
2879
2880 /* Remove possible STA entries from other IBSS networks. */
2881 sta_info_flush(local, NULL);
2882
2883 if (local->ops->reset_tsf) {
2884 /* Reset own TSF to allow time synchronization work. */
2885 local->ops->reset_tsf(local_to_hw(local));
2886 }
2887 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2888 res = ieee80211_if_config(dev);
2889 if (res)
2890 return res;
2891
2892 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2893
2894 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2895 sdata->drop_unencrypted = bss->capability &
2896 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2897
2898 res = ieee80211_set_channel(local, -1, bss->freq);
2899
2900 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2901 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2902 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2903 local->hw.conf.freq);
2904 return -1;
2905 }
2906
2907 /* Set beacon template based on scan results */
2908 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2909 do {
2910 if (!skb)
2911 break;
2912
2913 skb_reserve(skb, local->hw.extra_tx_headroom);
2914
2915 mgmt = (struct ieee80211_mgmt *)
2916 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2917 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2918 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2919 IEEE80211_STYPE_BEACON);
2920 memset(mgmt->da, 0xff, ETH_ALEN);
2921 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2922 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2923 mgmt->u.beacon.beacon_int =
2924 cpu_to_le16(local->hw.conf.beacon_int);
2925 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2926
2927 pos = skb_put(skb, 2 + ifsta->ssid_len);
2928 *pos++ = WLAN_EID_SSID;
2929 *pos++ = ifsta->ssid_len;
2930 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2931
2932 rates = bss->supp_rates_len;
2933 if (rates > 8)
2934 rates = 8;
2935 pos = skb_put(skb, 2 + rates);
2936 *pos++ = WLAN_EID_SUPP_RATES;
2937 *pos++ = rates;
2938 memcpy(pos, bss->supp_rates, rates);
2939
2940 pos = skb_put(skb, 2 + 1);
2941 *pos++ = WLAN_EID_DS_PARAMS;
2942 *pos++ = 1;
2943 *pos++ = bss->channel;
2944
2945 pos = skb_put(skb, 2 + 2);
2946 *pos++ = WLAN_EID_IBSS_PARAMS;
2947 *pos++ = 2;
2948 /* FIX: set ATIM window based on scan results */
2949 *pos++ = 0;
2950 *pos++ = 0;
2951
2952 if (bss->supp_rates_len > 8) {
2953 rates = bss->supp_rates_len - 8;
2954 pos = skb_put(skb, 2 + rates);
2955 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2956 *pos++ = rates;
2957 memcpy(pos, &bss->supp_rates[8], rates);
2958 }
2959
2960 memset(&control, 0, sizeof(control));
2961 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2962 if (!ratesel.rate) {
2963 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2964 "for IBSS beacon\n", dev->name);
2965 break;
2966 }
2967 control.vif = &sdata->vif;
2968 control.tx_rate =
2969 (sdata->bss_conf.use_short_preamble &&
2970 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2971 ratesel.rate->val2 : ratesel.rate->val;
2972 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2973 control.power_level = local->hw.conf.power_level;
2974 control.flags |= IEEE80211_TXCTL_NO_ACK;
2975 control.retry_limit = 1;
2976
2977 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2978 if (ifsta->probe_resp) {
2979 mgmt = (struct ieee80211_mgmt *)
2980 ifsta->probe_resp->data;
2981 mgmt->frame_control =
2982 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2983 IEEE80211_STYPE_PROBE_RESP);
2984 } else {
2985 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2986 "template for IBSS\n", dev->name);
2987 }
2988
2989 if (local->ops->beacon_update &&
2990 local->ops->beacon_update(local_to_hw(local),
2991 skb, &control) == 0) {
2992 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2993 "template based on scan results\n", dev->name);
2994 skb = NULL;
2995 }
2996
2997 rates = 0;
2998 mode = local->oper_hw_mode;
2999 for (i = 0; i < bss->supp_rates_len; i++) {
3000 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3001 for (j = 0; j < mode->num_rates; j++)
3002 if (mode->rates[j].rate == bitrate)
3003 rates |= BIT(j);
3004 }
3005 ifsta->supp_rates_bits = rates;
3006 } while (0);
3007
3008 if (skb) {
3009 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3010 "template\n", dev->name);
3011 dev_kfree_skb(skb);
3012 }
3013
3014 ifsta->state = IEEE80211_IBSS_JOINED;
3015 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3016
3017 ieee80211_rx_bss_put(dev, bss);
3018
3019 return res;
3020 }
3021
3022
3023 static int ieee80211_sta_create_ibss(struct net_device *dev,
3024 struct ieee80211_if_sta *ifsta)
3025 {
3026 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3027 struct ieee80211_sta_bss *bss;
3028 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3029 struct ieee80211_hw_mode *mode;
3030 u8 bssid[ETH_ALEN], *pos;
3031 int i;
3032 DECLARE_MAC_BUF(mac);
3033
3034 #if 0
3035 /* Easier testing, use fixed BSSID. */
3036 memset(bssid, 0xfe, ETH_ALEN);
3037 #else
3038 /* Generate random, not broadcast, locally administered BSSID. Mix in
3039 * own MAC address to make sure that devices that do not have proper
3040 * random number generator get different BSSID. */
3041 get_random_bytes(bssid, ETH_ALEN);
3042 for (i = 0; i < ETH_ALEN; i++)
3043 bssid[i] ^= dev->dev_addr[i];
3044 bssid[0] &= ~0x01;
3045 bssid[0] |= 0x02;
3046 #endif
3047
3048 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3049 dev->name, print_mac(mac, bssid));
3050
3051 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
3052 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3053 if (!bss)
3054 return -ENOMEM;
3055
3056 mode = local->oper_hw_mode;
3057
3058 if (local->hw.conf.beacon_int == 0)
3059 local->hw.conf.beacon_int = 100;
3060 bss->beacon_int = local->hw.conf.beacon_int;
3061 bss->hw_mode = local->hw.conf.phymode;
3062 bss->freq = local->hw.conf.freq;
3063 bss->last_update = jiffies;
3064 bss->capability = WLAN_CAPABILITY_IBSS;
3065 if (sdata->default_key) {
3066 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3067 } else
3068 sdata->drop_unencrypted = 0;
3069 bss->supp_rates_len = mode->num_rates;
3070 pos = bss->supp_rates;
3071 for (i = 0; i < mode->num_rates; i++) {
3072 int rate = mode->rates[i].rate;
3073 *pos++ = (u8) (rate / 5);
3074 }
3075
3076 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3077 }
3078
3079
3080 static int ieee80211_sta_find_ibss(struct net_device *dev,
3081 struct ieee80211_if_sta *ifsta)
3082 {
3083 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3084 struct ieee80211_sta_bss *bss;
3085 int found = 0;
3086 u8 bssid[ETH_ALEN];
3087 int active_ibss;
3088 DECLARE_MAC_BUF(mac);
3089 DECLARE_MAC_BUF(mac2);
3090
3091 if (ifsta->ssid_len == 0)
3092 return -EINVAL;
3093
3094 active_ibss = ieee80211_sta_active_ibss(dev);
3095 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3096 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3097 dev->name, active_ibss);
3098 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3099 spin_lock_bh(&local->sta_bss_lock);
3100 list_for_each_entry(bss, &local->sta_bss_list, list) {
3101 if (ifsta->ssid_len != bss->ssid_len ||
3102 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3103 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3104 continue;
3105 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3106 printk(KERN_DEBUG " bssid=%s found\n",
3107 print_mac(mac, bss->bssid));
3108 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3109 memcpy(bssid, bss->bssid, ETH_ALEN);
3110 found = 1;
3111 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3112 break;
3113 }
3114 spin_unlock_bh(&local->sta_bss_lock);
3115
3116 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3117 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3118 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3119 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3120 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3121 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
3122 ifsta->ssid, ifsta->ssid_len))) {
3123 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3124 " based on configured SSID\n",
3125 dev->name, print_mac(mac, bssid));
3126 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3127 }
3128 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3129 printk(KERN_DEBUG " did not try to join ibss\n");
3130 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3131
3132 /* Selected IBSS not found in current scan results - try to scan */
3133 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3134 !ieee80211_sta_active_ibss(dev)) {
3135 mod_timer(&ifsta->timer, jiffies +
3136 IEEE80211_IBSS_MERGE_INTERVAL);
3137 } else if (time_after(jiffies, local->last_scan_completed +
3138 IEEE80211_SCAN_INTERVAL)) {
3139 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3140 "join\n", dev->name);
3141 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3142 ifsta->ssid_len);
3143 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3144 int interval = IEEE80211_SCAN_INTERVAL;
3145
3146 if (time_after(jiffies, ifsta->ibss_join_req +
3147 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3148 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3149 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
3150 return ieee80211_sta_create_ibss(dev, ifsta);
3151 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3152 printk(KERN_DEBUG "%s: IBSS not allowed on the"
3153 " configured channel %d (%d MHz)\n",
3154 dev->name, local->hw.conf.channel,
3155 local->hw.conf.freq);
3156 }
3157
3158 /* No IBSS found - decrease scan interval and continue
3159 * scanning. */
3160 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3161 }
3162
3163 ifsta->state = IEEE80211_IBSS_SEARCH;
3164 mod_timer(&ifsta->timer, jiffies + interval);
3165 return 0;
3166 }
3167
3168 return 0;
3169 }
3170
3171
3172 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3173 {
3174 struct ieee80211_sub_if_data *sdata;
3175 struct ieee80211_if_sta *ifsta;
3176 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3177
3178 if (len > IEEE80211_MAX_SSID_LEN)
3179 return -EINVAL;
3180
3181 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3182 * not defined. */
3183 if (local->ops->conf_tx) {
3184 struct ieee80211_tx_queue_params qparam;
3185 int i;
3186
3187 memset(&qparam, 0, sizeof(qparam));
3188 /* TODO: are these ok defaults for all hw_modes? */
3189 qparam.aifs = 2;
3190 qparam.cw_min =
3191 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3192 qparam.cw_max = 1023;
3193 qparam.burst_time = 0;
3194 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3195 {
3196 local->ops->conf_tx(local_to_hw(local),
3197 i + IEEE80211_TX_QUEUE_DATA0,
3198 &qparam);
3199 }
3200 /* IBSS uses different parameters for Beacon sending */
3201 qparam.cw_min++;
3202 qparam.cw_min *= 2;
3203 qparam.cw_min--;
3204 local->ops->conf_tx(local_to_hw(local),
3205 IEEE80211_TX_QUEUE_BEACON, &qparam);
3206 }
3207
3208 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3209 ifsta = &sdata->u.sta;
3210
3211 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3212 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3213 memcpy(ifsta->ssid, ssid, len);
3214 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3215 ifsta->ssid_len = len;
3216
3217 if (len)
3218 ifsta->flags |= IEEE80211_STA_SSID_SET;
3219 else
3220 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3221 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3222 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3223 ifsta->ibss_join_req = jiffies;
3224 ifsta->state = IEEE80211_IBSS_SEARCH;
3225 return ieee80211_sta_find_ibss(dev, ifsta);
3226 }
3227 return 0;
3228 }
3229
3230
3231 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3232 {
3233 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3234 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3235 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3236 *len = ifsta->ssid_len;
3237 return 0;
3238 }
3239
3240
3241 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3242 {
3243 struct ieee80211_sub_if_data *sdata;
3244 struct ieee80211_if_sta *ifsta;
3245 int res;
3246
3247 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3248 ifsta = &sdata->u.sta;
3249
3250 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3251 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3252 res = ieee80211_if_config(dev);
3253 if (res) {
3254 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3255 "the low-level driver\n", dev->name);
3256 return res;
3257 }
3258 }
3259
3260 if (is_valid_ether_addr(bssid))
3261 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3262 else
3263 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3264
3265 return 0;
3266 }
3267
3268
3269 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3270 struct ieee80211_sub_if_data *sdata,
3271 int powersave)
3272 {
3273 struct sk_buff *skb;
3274 struct ieee80211_hdr *nullfunc;
3275 u16 fc;
3276
3277 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3278 if (!skb) {
3279 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3280 "frame\n", sdata->dev->name);
3281 return;
3282 }
3283 skb_reserve(skb, local->hw.extra_tx_headroom);
3284
3285 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3286 memset(nullfunc, 0, 24);
3287 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3288 IEEE80211_FCTL_TODS;
3289 if (powersave)
3290 fc |= IEEE80211_FCTL_PM;
3291 nullfunc->frame_control = cpu_to_le16(fc);
3292 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3293 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3294 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3295
3296 ieee80211_sta_tx(sdata->dev, skb, 0);
3297 }
3298
3299
3300 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3301 {
3302 struct ieee80211_local *local = hw_to_local(hw);
3303 struct net_device *dev = local->scan_dev;
3304 struct ieee80211_sub_if_data *sdata;
3305 union iwreq_data wrqu;
3306
3307 local->last_scan_completed = jiffies;
3308 memset(&wrqu, 0, sizeof(wrqu));
3309 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3310
3311 if (local->sta_hw_scanning) {
3312 local->sta_hw_scanning = 0;
3313 goto done;
3314 }
3315
3316 local->sta_sw_scanning = 0;
3317 if (ieee80211_hw_config(local))
3318 printk(KERN_DEBUG "%s: failed to restore operational "
3319 "channel after scan\n", dev->name);
3320
3321
3322 netif_tx_lock_bh(local->mdev);
3323 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3324 local->ops->configure_filter(local_to_hw(local),
3325 FIF_BCN_PRBRESP_PROMISC,
3326 &local->filter_flags,
3327 local->mdev->mc_count,
3328 local->mdev->mc_list);
3329
3330 netif_tx_unlock_bh(local->mdev);
3331
3332 rcu_read_lock();
3333 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3334
3335 /* No need to wake the master device. */
3336 if (sdata->dev == local->mdev)
3337 continue;
3338
3339 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3340 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3341 ieee80211_send_nullfunc(local, sdata, 0);
3342 ieee80211_sta_timer((unsigned long)sdata);
3343 }
3344
3345 netif_wake_queue(sdata->dev);
3346 }
3347 rcu_read_unlock();
3348
3349 done:
3350 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3351 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3352 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3353 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3354 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3355 !ieee80211_sta_active_ibss(dev)))
3356 ieee80211_sta_find_ibss(dev, ifsta);
3357 }
3358 }
3359 EXPORT_SYMBOL(ieee80211_scan_completed);
3360
3361 void ieee80211_sta_scan_work(struct work_struct *work)
3362 {
3363 struct ieee80211_local *local =
3364 container_of(work, struct ieee80211_local, scan_work.work);
3365 struct net_device *dev = local->scan_dev;
3366 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3367 struct ieee80211_hw_mode *mode;
3368 struct ieee80211_channel *chan;
3369 int skip;
3370 unsigned long next_delay = 0;
3371
3372 if (!local->sta_sw_scanning)
3373 return;
3374
3375 switch (local->scan_state) {
3376 case SCAN_SET_CHANNEL:
3377 mode = local->scan_hw_mode;
3378 if (local->scan_hw_mode->list.next == &local->modes_list &&
3379 local->scan_channel_idx >= mode->num_channels) {
3380 ieee80211_scan_completed(local_to_hw(local));
3381 return;
3382 }
3383 skip = !(local->enabled_modes & (1 << mode->mode));
3384 chan = &mode->channels[local->scan_channel_idx];
3385 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3386 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3387 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3388 (local->hw_modes & local->enabled_modes &
3389 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3390 skip = 1;
3391
3392 if (!skip) {
3393 #if 0
3394 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3395 dev->name, chan->chan, chan->freq);
3396 #endif
3397
3398 local->scan_channel = chan;
3399 if (ieee80211_hw_config(local)) {
3400 printk(KERN_DEBUG "%s: failed to set channel "
3401 "%d (%d MHz) for scan\n", dev->name,
3402 chan->chan, chan->freq);
3403 skip = 1;
3404 }
3405 }
3406
3407 local->scan_channel_idx++;
3408 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3409 if (local->scan_hw_mode->list.next != &local->modes_list) {
3410 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3411 struct ieee80211_hw_mode,
3412 list);
3413 local->scan_channel_idx = 0;
3414 }
3415 }
3416
3417 if (skip)
3418 break;
3419
3420 next_delay = IEEE80211_PROBE_DELAY +
3421 usecs_to_jiffies(local->hw.channel_change_time);
3422 local->scan_state = SCAN_SEND_PROBE;
3423 break;
3424 case SCAN_SEND_PROBE:
3425 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3426 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3427 local->scan_ssid_len);
3428 next_delay = IEEE80211_CHANNEL_TIME;
3429 } else
3430 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3431 local->scan_state = SCAN_SET_CHANNEL;
3432 break;
3433 }
3434
3435 if (local->sta_sw_scanning)
3436 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3437 next_delay);
3438 }
3439
3440
3441 static int ieee80211_sta_start_scan(struct net_device *dev,
3442 u8 *ssid, size_t ssid_len)
3443 {
3444 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3445 struct ieee80211_sub_if_data *sdata;
3446
3447 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3448 return -EINVAL;
3449
3450 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3451 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3452 * BSSID: MACAddress
3453 * SSID
3454 * ScanType: ACTIVE, PASSIVE
3455 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3456 * a Probe frame during active scanning
3457 * ChannelList
3458 * MinChannelTime (>= ProbeDelay), in TU
3459 * MaxChannelTime: (>= MinChannelTime), in TU
3460 */
3461
3462 /* MLME-SCAN.confirm
3463 * BSSDescriptionSet
3464 * ResultCode: SUCCESS, INVALID_PARAMETERS
3465 */
3466
3467 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3468 if (local->scan_dev == dev)
3469 return 0;
3470 return -EBUSY;
3471 }
3472
3473 if (local->ops->hw_scan) {
3474 int rc = local->ops->hw_scan(local_to_hw(local),
3475 ssid, ssid_len);
3476 if (!rc) {
3477 local->sta_hw_scanning = 1;
3478 local->scan_dev = dev;
3479 }
3480 return rc;
3481 }
3482
3483 local->sta_sw_scanning = 1;
3484
3485 rcu_read_lock();
3486 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3487
3488 /* Don't stop the master interface, otherwise we can't transmit
3489 * probes! */
3490 if (sdata->dev == local->mdev)
3491 continue;
3492
3493 netif_stop_queue(sdata->dev);
3494 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3495 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3496 ieee80211_send_nullfunc(local, sdata, 1);
3497 }
3498 rcu_read_unlock();
3499
3500 if (ssid) {
3501 local->scan_ssid_len = ssid_len;
3502 memcpy(local->scan_ssid, ssid, ssid_len);
3503 } else
3504 local->scan_ssid_len = 0;
3505 local->scan_state = SCAN_SET_CHANNEL;
3506 local->scan_hw_mode = list_entry(local->modes_list.next,
3507 struct ieee80211_hw_mode,
3508 list);
3509 local->scan_channel_idx = 0;
3510 local->scan_dev = dev;
3511
3512 netif_tx_lock_bh(local->mdev);
3513 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3514 local->ops->configure_filter(local_to_hw(local),
3515 FIF_BCN_PRBRESP_PROMISC,
3516 &local->filter_flags,
3517 local->mdev->mc_count,
3518 local->mdev->mc_list);
3519 netif_tx_unlock_bh(local->mdev);
3520
3521 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3522 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3523 IEEE80211_CHANNEL_TIME);
3524
3525 return 0;
3526 }
3527
3528
3529 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3530 {
3531 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3532 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3533 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3534
3535 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3536 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3537
3538 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3539 if (local->scan_dev == dev)
3540 return 0;
3541 return -EBUSY;
3542 }
3543
3544 ifsta->scan_ssid_len = ssid_len;
3545 if (ssid_len)
3546 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3547 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3548 queue_work(local->hw.workqueue, &ifsta->work);
3549 return 0;
3550 }
3551
3552 static char *
3553 ieee80211_sta_scan_result(struct net_device *dev,
3554 struct ieee80211_sta_bss *bss,
3555 char *current_ev, char *end_buf)
3556 {
3557 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3558 struct iw_event iwe;
3559
3560 if (time_after(jiffies,
3561 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3562 return current_ev;
3563
3564 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3565 return current_ev;
3566
3567 memset(&iwe, 0, sizeof(iwe));
3568 iwe.cmd = SIOCGIWAP;
3569 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3570 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3571 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3572 IW_EV_ADDR_LEN);
3573
3574 memset(&iwe, 0, sizeof(iwe));
3575 iwe.cmd = SIOCGIWESSID;
3576 iwe.u.data.length = bss->ssid_len;
3577 iwe.u.data.flags = 1;
3578 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3579 bss->ssid);
3580
3581 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3582 memset(&iwe, 0, sizeof(iwe));
3583 iwe.cmd = SIOCGIWMODE;
3584 if (bss->capability & WLAN_CAPABILITY_ESS)
3585 iwe.u.mode = IW_MODE_MASTER;
3586 else
3587 iwe.u.mode = IW_MODE_ADHOC;
3588 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3589 IW_EV_UINT_LEN);
3590 }
3591
3592 memset(&iwe, 0, sizeof(iwe));
3593 iwe.cmd = SIOCGIWFREQ;
3594 iwe.u.freq.m = bss->channel;
3595 iwe.u.freq.e = 0;
3596 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3597 IW_EV_FREQ_LEN);
3598 iwe.u.freq.m = bss->freq * 100000;
3599 iwe.u.freq.e = 1;
3600 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3601 IW_EV_FREQ_LEN);
3602
3603 memset(&iwe, 0, sizeof(iwe));
3604 iwe.cmd = IWEVQUAL;
3605 iwe.u.qual.qual = bss->signal;
3606 iwe.u.qual.level = bss->rssi;
3607 iwe.u.qual.noise = bss->noise;
3608 iwe.u.qual.updated = local->wstats_flags;
3609 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3610 IW_EV_QUAL_LEN);
3611
3612 memset(&iwe, 0, sizeof(iwe));
3613 iwe.cmd = SIOCGIWENCODE;
3614 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3615 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3616 else
3617 iwe.u.data.flags = IW_ENCODE_DISABLED;
3618 iwe.u.data.length = 0;
3619 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3620
3621 if (bss && bss->wpa_ie) {
3622 memset(&iwe, 0, sizeof(iwe));
3623 iwe.cmd = IWEVGENIE;
3624 iwe.u.data.length = bss->wpa_ie_len;
3625 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3626 bss->wpa_ie);
3627 }
3628
3629 if (bss && bss->rsn_ie) {
3630 memset(&iwe, 0, sizeof(iwe));
3631 iwe.cmd = IWEVGENIE;
3632 iwe.u.data.length = bss->rsn_ie_len;
3633 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3634 bss->rsn_ie);
3635 }
3636
3637 if (bss && bss->supp_rates_len > 0) {
3638 /* display all supported rates in readable format */
3639 char *p = current_ev + IW_EV_LCP_LEN;
3640 int i;
3641
3642 memset(&iwe, 0, sizeof(iwe));
3643 iwe.cmd = SIOCGIWRATE;
3644 /* Those two flags are ignored... */
3645 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3646
3647 for (i = 0; i < bss->supp_rates_len; i++) {
3648 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3649 0x7f) * 500000);
3650 p = iwe_stream_add_value(current_ev, p,
3651 end_buf, &iwe, IW_EV_PARAM_LEN);
3652 }
3653 current_ev = p;
3654 }
3655
3656 if (bss) {
3657 char *buf;
3658 buf = kmalloc(30, GFP_ATOMIC);
3659 if (buf) {
3660 memset(&iwe, 0, sizeof(iwe));
3661 iwe.cmd = IWEVCUSTOM;
3662 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3663 iwe.u.data.length = strlen(buf);
3664 current_ev = iwe_stream_add_point(current_ev, end_buf,
3665 &iwe, buf);
3666 kfree(buf);
3667 }
3668 }
3669
3670 return current_ev;
3671 }
3672
3673
3674 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3675 {
3676 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3677 char *current_ev = buf;
3678 char *end_buf = buf + len;
3679 struct ieee80211_sta_bss *bss;
3680
3681 spin_lock_bh(&local->sta_bss_lock);
3682 list_for_each_entry(bss, &local->sta_bss_list, list) {
3683 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3684 spin_unlock_bh(&local->sta_bss_lock);
3685 return -E2BIG;
3686 }
3687 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3688 end_buf);
3689 }
3690 spin_unlock_bh(&local->sta_bss_lock);
3691 return current_ev - buf;
3692 }
3693
3694
3695 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3696 {
3697 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3698 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3699 kfree(ifsta->extra_ie);
3700 if (len == 0) {
3701 ifsta->extra_ie = NULL;
3702 ifsta->extra_ie_len = 0;
3703 return 0;
3704 }
3705 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3706 if (!ifsta->extra_ie) {
3707 ifsta->extra_ie_len = 0;
3708 return -ENOMEM;
3709 }
3710 memcpy(ifsta->extra_ie, ie, len);
3711 ifsta->extra_ie_len = len;
3712 return 0;
3713 }
3714
3715
3716 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3717 struct sk_buff *skb, u8 *bssid,
3718 u8 *addr)
3719 {
3720 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3721 struct sta_info *sta;
3722 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3723 DECLARE_MAC_BUF(mac);
3724
3725 /* TODO: Could consider removing the least recently used entry and
3726 * allow new one to be added. */
3727 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3728 if (net_ratelimit()) {
3729 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3730 "entry %s\n", dev->name, print_mac(mac, addr));
3731 }
3732 return NULL;
3733 }
3734
3735 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3736 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3737
3738 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3739 if (!sta)
3740 return NULL;
3741
3742 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3743
3744 rate_control_rate_init(sta, local);
3745
3746 return sta; /* caller will call sta_info_put() */
3747 }
3748
3749
3750 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3751 {
3752 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3753 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3754
3755 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3756 dev->name, reason);
3757
3758 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3759 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3760 return -EINVAL;
3761
3762 ieee80211_send_deauth(dev, ifsta, reason);
3763 ieee80211_set_disassoc(dev, ifsta, 1);
3764 return 0;
3765 }
3766
3767
3768 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3769 {
3770 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3771 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3772
3773 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3774 dev->name, reason);
3775
3776 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3777 return -EINVAL;
3778
3779 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3780 return -1;
3781
3782 ieee80211_send_disassoc(dev, ifsta, reason);
3783 ieee80211_set_disassoc(dev, ifsta, 0);
3784 return 0;
3785 }
Linux kernel - Deliverables
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