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mac80211: move TX info into skb->cb
[linux-2.6/sactl.git] / net / mac80211 / mlme.c
blob9a264379d7b180fc15b4f0b5b1b663ebeecda459
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 <linux/rtnetlink.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
30
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
33 #include "rate.h"
34 #include "led.h"
35 #include "mesh.h"
36
37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_MAX_TRIES 3
41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49 #define IEEE80211_PROBE_DELAY (HZ / 33)
50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
56
57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
60 #define ERP_INFO_USE_PROTECTION BIT(1)
61
62 /* mgmt header + 1 byte action code */
63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
64
65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
70
71 /* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73 #define IEEE80211_MIN_AMPDU_BUF 0x8
74 #define IEEE80211_MAX_AMPDU_BUF 0x40
75
76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78 static struct ieee80211_sta_bss *
79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
80 u8 *ssid, u8 ssid_len);
81 static void ieee80211_rx_bss_put(struct net_device *dev,
82 struct ieee80211_sta_bss *bss);
83 static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85 static int ieee80211_sta_wep_configured(struct net_device *dev);
86 static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88 static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
90 static void sta_rx_agg_session_timer_expired(unsigned long data);
91
92
93 void ieee802_11_parse_elems(u8 *start, size_t len,
94 struct ieee802_11_elems *elems)
95 {
96 size_t left = len;
97 u8 *pos = start;
98
99 memset(elems, 0, sizeof(*elems));
100
101 while (left >= 2) {
102 u8 id, elen;
103
104 id = *pos++;
105 elen = *pos++;
106 left -= 2;
107
108 if (elen > left)
109 return;
110
111 switch (id) {
112 case WLAN_EID_SSID:
113 elems->ssid = pos;
114 elems->ssid_len = elen;
115 break;
116 case WLAN_EID_SUPP_RATES:
117 elems->supp_rates = pos;
118 elems->supp_rates_len = elen;
119 break;
120 case WLAN_EID_FH_PARAMS:
121 elems->fh_params = pos;
122 elems->fh_params_len = elen;
123 break;
124 case WLAN_EID_DS_PARAMS:
125 elems->ds_params = pos;
126 elems->ds_params_len = elen;
127 break;
128 case WLAN_EID_CF_PARAMS:
129 elems->cf_params = pos;
130 elems->cf_params_len = elen;
131 break;
132 case WLAN_EID_TIM:
133 elems->tim = pos;
134 elems->tim_len = elen;
135 break;
136 case WLAN_EID_IBSS_PARAMS:
137 elems->ibss_params = pos;
138 elems->ibss_params_len = elen;
139 break;
140 case WLAN_EID_CHALLENGE:
141 elems->challenge = pos;
142 elems->challenge_len = elen;
143 break;
144 case WLAN_EID_WPA:
145 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
146 pos[2] == 0xf2) {
147 /* Microsoft OUI (00:50:F2) */
148 if (pos[3] == 1) {
149 /* OUI Type 1 - WPA IE */
150 elems->wpa = pos;
151 elems->wpa_len = elen;
152 } else if (elen >= 5 && pos[3] == 2) {
153 if (pos[4] == 0) {
154 elems->wmm_info = pos;
155 elems->wmm_info_len = elen;
156 } else if (pos[4] == 1) {
157 elems->wmm_param = pos;
158 elems->wmm_param_len = elen;
159 }
160 }
161 }
162 break;
163 case WLAN_EID_RSN:
164 elems->rsn = pos;
165 elems->rsn_len = elen;
166 break;
167 case WLAN_EID_ERP_INFO:
168 elems->erp_info = pos;
169 elems->erp_info_len = elen;
170 break;
171 case WLAN_EID_EXT_SUPP_RATES:
172 elems->ext_supp_rates = pos;
173 elems->ext_supp_rates_len = elen;
174 break;
175 case WLAN_EID_HT_CAPABILITY:
176 elems->ht_cap_elem = pos;
177 elems->ht_cap_elem_len = elen;
178 break;
179 case WLAN_EID_HT_EXTRA_INFO:
180 elems->ht_info_elem = pos;
181 elems->ht_info_elem_len = elen;
182 break;
183 case WLAN_EID_MESH_ID:
184 elems->mesh_id = pos;
185 elems->mesh_id_len = elen;
186 break;
187 case WLAN_EID_MESH_CONFIG:
188 elems->mesh_config = pos;
189 elems->mesh_config_len = elen;
190 break;
191 case WLAN_EID_PEER_LINK:
192 elems->peer_link = pos;
193 elems->peer_link_len = elen;
194 break;
195 case WLAN_EID_PREQ:
196 elems->preq = pos;
197 elems->preq_len = elen;
198 break;
199 case WLAN_EID_PREP:
200 elems->prep = pos;
201 elems->prep_len = elen;
202 break;
203 case WLAN_EID_PERR:
204 elems->perr = pos;
205 elems->perr_len = elen;
206 break;
207 default:
208 break;
209 }
210
211 left -= elen;
212 pos += elen;
213 }
214 }
215
216
217 static int ecw2cw(int ecw)
218 {
219 return (1 << ecw) - 1;
220 }
221
222
223 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
224 struct ieee80211_sta_bss *bss,
225 int ibss)
226 {
227 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
228 struct ieee80211_local *local = sdata->local;
229 int i, have_higher_than_11mbit = 0;
230
231
232 /* cf. IEEE 802.11 9.2.12 */
233 for (i = 0; i < bss->supp_rates_len; i++)
234 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
235 have_higher_than_11mbit = 1;
236
237 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
238 have_higher_than_11mbit)
239 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
240 else
241 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
242
243
244 if (local->ops->conf_tx) {
245 struct ieee80211_tx_queue_params qparam;
246
247 memset(&qparam, 0, sizeof(qparam));
248
249 qparam.aifs = 2;
250
251 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
252 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
253 qparam.cw_min = 31;
254 else
255 qparam.cw_min = 15;
256
257 qparam.cw_max = 1023;
258 qparam.txop = 0;
259
260 for (i = 0; i < local_to_hw(local)->queues; i++)
261 local->ops->conf_tx(local_to_hw(local), i, &qparam);
262 }
263 }
264
265 static void ieee80211_sta_wmm_params(struct net_device *dev,
266 struct ieee80211_if_sta *ifsta,
267 u8 *wmm_param, size_t wmm_param_len)
268 {
269 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
270 struct ieee80211_tx_queue_params params;
271 size_t left;
272 int count;
273 u8 *pos;
274
275 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
276 return;
277
278 if (!wmm_param)
279 return;
280
281 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
282 return;
283 count = wmm_param[6] & 0x0f;
284 if (count == ifsta->wmm_last_param_set)
285 return;
286 ifsta->wmm_last_param_set = count;
287
288 pos = wmm_param + 8;
289 left = wmm_param_len - 8;
290
291 memset(&params, 0, sizeof(params));
292
293 if (!local->ops->conf_tx)
294 return;
295
296 local->wmm_acm = 0;
297 for (; left >= 4; left -= 4, pos += 4) {
298 int aci = (pos[0] >> 5) & 0x03;
299 int acm = (pos[0] >> 4) & 0x01;
300 int queue;
301
302 switch (aci) {
303 case 1:
304 queue = 3;
305 if (acm)
306 local->wmm_acm |= BIT(0) | BIT(3);
307 break;
308 case 2:
309 queue = 1;
310 if (acm)
311 local->wmm_acm |= BIT(4) | BIT(5);
312 break;
313 case 3:
314 queue = 0;
315 if (acm)
316 local->wmm_acm |= BIT(6) | BIT(7);
317 break;
318 case 0:
319 default:
320 queue = 2;
321 if (acm)
322 local->wmm_acm |= BIT(1) | BIT(2);
323 break;
324 }
325
326 params.aifs = pos[0] & 0x0f;
327 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
328 params.cw_min = ecw2cw(pos[1] & 0x0f);
329 params.txop = pos[2] | (pos[3] << 8);
330 #ifdef CONFIG_MAC80211_DEBUG
331 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
332 "cWmin=%d cWmax=%d txop=%d\n",
333 dev->name, queue, aci, acm, params.aifs, params.cw_min,
334 params.cw_max, params.txop);
335 #endif
336 /* TODO: handle ACM (block TX, fallback to next lowest allowed
337 * AC for now) */
338 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
339 printk(KERN_DEBUG "%s: failed to set TX queue "
340 "parameters for queue %d\n", dev->name, queue);
341 }
342 }
343 }
344
345 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
346 bool use_protection,
347 bool use_short_preamble)
348 {
349 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
350 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
351 DECLARE_MAC_BUF(mac);
352 u32 changed = 0;
353
354 if (use_protection != bss_conf->use_cts_prot) {
355 if (net_ratelimit()) {
356 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
357 "%s)\n",
358 sdata->dev->name,
359 use_protection ? "enabled" : "disabled",
360 print_mac(mac, ifsta->bssid));
361 }
362 bss_conf->use_cts_prot = use_protection;
363 changed |= BSS_CHANGED_ERP_CTS_PROT;
364 }
365
366 if (use_short_preamble != bss_conf->use_short_preamble) {
367 if (net_ratelimit()) {
368 printk(KERN_DEBUG "%s: switched to %s barker preamble"
369 " (BSSID=%s)\n",
370 sdata->dev->name,
371 use_short_preamble ? "short" : "long",
372 print_mac(mac, ifsta->bssid));
373 }
374 bss_conf->use_short_preamble = use_short_preamble;
375 changed |= BSS_CHANGED_ERP_PREAMBLE;
376 }
377
378 return changed;
379 }
380
381 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
382 u8 erp_value)
383 {
384 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
385 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
386
387 return ieee80211_handle_protect_preamb(sdata,
388 use_protection, use_short_preamble);
389 }
390
391 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
392 struct ieee80211_sta_bss *bss)
393 {
394 u32 changed = 0;
395
396 if (bss->has_erp_value)
397 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
398 else {
399 u16 capab = bss->capability;
400 changed |= ieee80211_handle_protect_preamb(sdata, false,
401 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
402 }
403
404 return changed;
405 }
406
407 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
408 struct ieee80211_ht_info *ht_info)
409 {
410
411 if (ht_info == NULL)
412 return -EINVAL;
413
414 memset(ht_info, 0, sizeof(*ht_info));
415
416 if (ht_cap_ie) {
417 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
418
419 ht_info->ht_supported = 1;
420 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
421 ht_info->ampdu_factor =
422 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
423 ht_info->ampdu_density =
424 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
425 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
426 } else
427 ht_info->ht_supported = 0;
428
429 return 0;
430 }
431
432 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
433 struct ieee80211_ht_addt_info *ht_add_info_ie,
434 struct ieee80211_ht_bss_info *bss_info)
435 {
436 if (bss_info == NULL)
437 return -EINVAL;
438
439 memset(bss_info, 0, sizeof(*bss_info));
440
441 if (ht_add_info_ie) {
442 u16 op_mode;
443 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
444
445 bss_info->primary_channel = ht_add_info_ie->control_chan;
446 bss_info->bss_cap = ht_add_info_ie->ht_param;
447 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
448 }
449
450 return 0;
451 }
452
453 static void ieee80211_sta_send_associnfo(struct net_device *dev,
454 struct ieee80211_if_sta *ifsta)
455 {
456 char *buf;
457 size_t len;
458 int i;
459 union iwreq_data wrqu;
460
461 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
462 return;
463
464 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
465 ifsta->assocresp_ies_len), GFP_KERNEL);
466 if (!buf)
467 return;
468
469 len = sprintf(buf, "ASSOCINFO(");
470 if (ifsta->assocreq_ies) {
471 len += sprintf(buf + len, "ReqIEs=");
472 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
473 len += sprintf(buf + len, "%02x",
474 ifsta->assocreq_ies[i]);
475 }
476 }
477 if (ifsta->assocresp_ies) {
478 if (ifsta->assocreq_ies)
479 len += sprintf(buf + len, " ");
480 len += sprintf(buf + len, "RespIEs=");
481 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
482 len += sprintf(buf + len, "%02x",
483 ifsta->assocresp_ies[i]);
484 }
485 }
486 len += sprintf(buf + len, ")");
487
488 if (len > IW_CUSTOM_MAX) {
489 len = sprintf(buf, "ASSOCRESPIE=");
490 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
491 len += sprintf(buf + len, "%02x",
492 ifsta->assocresp_ies[i]);
493 }
494 }
495
496 memset(&wrqu, 0, sizeof(wrqu));
497 wrqu.data.length = len;
498 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
499
500 kfree(buf);
501 }
502
503
504 static void ieee80211_set_associated(struct net_device *dev,
505 struct ieee80211_if_sta *ifsta,
506 bool assoc)
507 {
508 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
509 struct ieee80211_local *local = sdata->local;
510 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
511 union iwreq_data wrqu;
512 u32 changed = BSS_CHANGED_ASSOC;
513
514 if (assoc) {
515 struct ieee80211_sta_bss *bss;
516
517 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
518
519 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
520 return;
521
522 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
523 conf->channel->center_freq,
524 ifsta->ssid, ifsta->ssid_len);
525 if (bss) {
526 /* set timing information */
527 sdata->bss_conf.beacon_int = bss->beacon_int;
528 sdata->bss_conf.timestamp = bss->timestamp;
529
530 changed |= ieee80211_handle_bss_capability(sdata, bss);
531
532 ieee80211_rx_bss_put(dev, bss);
533 }
534
535 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
536 changed |= BSS_CHANGED_HT;
537 sdata->bss_conf.assoc_ht = 1;
538 sdata->bss_conf.ht_conf = &conf->ht_conf;
539 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
540 }
541
542 netif_carrier_on(dev);
543 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
544 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
545 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
546 ieee80211_sta_send_associnfo(dev, ifsta);
547 } else {
548 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
549 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
550 netif_carrier_off(dev);
551 ieee80211_reset_erp_info(dev);
552
553 sdata->bss_conf.assoc_ht = 0;
554 sdata->bss_conf.ht_conf = NULL;
555 sdata->bss_conf.ht_bss_conf = NULL;
556
557 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
558 }
559 ifsta->last_probe = jiffies;
560 ieee80211_led_assoc(local, assoc);
561
562 sdata->bss_conf.assoc = assoc;
563 ieee80211_bss_info_change_notify(sdata, changed);
564 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
565 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
566 }
567
568 static void ieee80211_set_disassoc(struct net_device *dev,
569 struct ieee80211_if_sta *ifsta, int deauth)
570 {
571 if (deauth)
572 ifsta->auth_tries = 0;
573 ifsta->assoc_tries = 0;
574 ieee80211_set_associated(dev, ifsta, 0);
575 }
576
577 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
578 int encrypt)
579 {
580 struct ieee80211_sub_if_data *sdata;
581 struct ieee80211_tx_info *info;
582
583 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
584 skb->dev = sdata->local->mdev;
585 skb_set_mac_header(skb, 0);
586 skb_set_network_header(skb, 0);
587 skb_set_transport_header(skb, 0);
588
589 info = IEEE80211_SKB_CB(skb);
590 memset(info, 0, sizeof(struct ieee80211_tx_info));
591 info->control.ifindex = sdata->dev->ifindex;
592 if (!encrypt)
593 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
594
595 dev_queue_xmit(skb);
596 }
597
598
599 static void ieee80211_send_auth(struct net_device *dev,
600 struct ieee80211_if_sta *ifsta,
601 int transaction, u8 *extra, size_t extra_len,
602 int encrypt)
603 {
604 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
605 struct sk_buff *skb;
606 struct ieee80211_mgmt *mgmt;
607
608 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
609 sizeof(*mgmt) + 6 + extra_len);
610 if (!skb) {
611 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
612 "frame\n", dev->name);
613 return;
614 }
615 skb_reserve(skb, local->hw.extra_tx_headroom);
616
617 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
618 memset(mgmt, 0, 24 + 6);
619 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
620 IEEE80211_STYPE_AUTH);
621 if (encrypt)
622 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
623 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
624 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
625 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
626 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
627 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
628 ifsta->auth_transaction = transaction + 1;
629 mgmt->u.auth.status_code = cpu_to_le16(0);
630 if (extra)
631 memcpy(skb_put(skb, extra_len), extra, extra_len);
632
633 ieee80211_sta_tx(dev, skb, encrypt);
634 }
635
636
637 static void ieee80211_authenticate(struct net_device *dev,
638 struct ieee80211_if_sta *ifsta)
639 {
640 DECLARE_MAC_BUF(mac);
641
642 ifsta->auth_tries++;
643 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
644 printk(KERN_DEBUG "%s: authentication with AP %s"
645 " timed out\n",
646 dev->name, print_mac(mac, ifsta->bssid));
647 ifsta->state = IEEE80211_DISABLED;
648 return;
649 }
650
651 ifsta->state = IEEE80211_AUTHENTICATE;
652 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
653 dev->name, print_mac(mac, ifsta->bssid));
654
655 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
656
657 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
658 }
659
660 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
661 struct ieee80211_supported_band *sband,
662 u64 *rates)
663 {
664 int i, j, count;
665 *rates = 0;
666 count = 0;
667 for (i = 0; i < bss->supp_rates_len; i++) {
668 int rate = (bss->supp_rates[i] & 0x7F) * 5;
669
670 for (j = 0; j < sband->n_bitrates; j++)
671 if (sband->bitrates[j].bitrate == rate) {
672 *rates |= BIT(j);
673 count++;
674 break;
675 }
676 }
677
678 return count;
679 }
680
681 static void ieee80211_send_assoc(struct net_device *dev,
682 struct ieee80211_if_sta *ifsta)
683 {
684 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
685 struct sk_buff *skb;
686 struct ieee80211_mgmt *mgmt;
687 u8 *pos, *ies;
688 int i, len, count, rates_len, supp_rates_len;
689 u16 capab;
690 struct ieee80211_sta_bss *bss;
691 int wmm = 0;
692 struct ieee80211_supported_band *sband;
693 u64 rates = 0;
694
695 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
696 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
697 ifsta->ssid_len);
698 if (!skb) {
699 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
700 "frame\n", dev->name);
701 return;
702 }
703 skb_reserve(skb, local->hw.extra_tx_headroom);
704
705 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
706
707 capab = ifsta->capab;
708
709 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
710 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
711 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
712 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
713 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
714 }
715
716 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
717 local->hw.conf.channel->center_freq,
718 ifsta->ssid, ifsta->ssid_len);
719 if (bss) {
720 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
721 capab |= WLAN_CAPABILITY_PRIVACY;
722 if (bss->wmm_ie)
723 wmm = 1;
724 ieee80211_rx_bss_put(dev, bss);
725 }
726
727 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
728 memset(mgmt, 0, 24);
729 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
730 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
731 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
732
733 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
734 skb_put(skb, 10);
735 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
736 IEEE80211_STYPE_REASSOC_REQ);
737 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
738 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
739 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
740 ETH_ALEN);
741 } else {
742 skb_put(skb, 4);
743 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
744 IEEE80211_STYPE_ASSOC_REQ);
745 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
746 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
747 }
748
749 /* SSID */
750 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
751 *pos++ = WLAN_EID_SSID;
752 *pos++ = ifsta->ssid_len;
753 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
754
755 /* all supported rates should be added here but some APs
756 * (e.g. D-Link DAP 1353 in b-only mode) don't like that
757 * Therefore only add rates the AP supports */
758 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
759 supp_rates_len = rates_len;
760 if (supp_rates_len > 8)
761 supp_rates_len = 8;
762
763 len = sband->n_bitrates;
764 pos = skb_put(skb, supp_rates_len + 2);
765 *pos++ = WLAN_EID_SUPP_RATES;
766 *pos++ = supp_rates_len;
767
768 count = 0;
769 for (i = 0; i < sband->n_bitrates; i++) {
770 if (BIT(i) & rates) {
771 int rate = sband->bitrates[i].bitrate;
772 *pos++ = (u8) (rate / 5);
773 if (++count == 8)
774 break;
775 }
776 }
777
778 if (count == 8) {
779 pos = skb_put(skb, rates_len - count + 2);
780 *pos++ = WLAN_EID_EXT_SUPP_RATES;
781 *pos++ = rates_len - count;
782
783 for (i++; i < sband->n_bitrates; i++) {
784 if (BIT(i) & rates) {
785 int rate = sband->bitrates[i].bitrate;
786 *pos++ = (u8) (rate / 5);
787 }
788 }
789 }
790
791 if (ifsta->extra_ie) {
792 pos = skb_put(skb, ifsta->extra_ie_len);
793 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
794 }
795
796 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
797 pos = skb_put(skb, 9);
798 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
799 *pos++ = 7; /* len */
800 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
801 *pos++ = 0x50;
802 *pos++ = 0xf2;
803 *pos++ = 2; /* WME */
804 *pos++ = 0; /* WME info */
805 *pos++ = 1; /* WME ver */
806 *pos++ = 0;
807 }
808
809 /* wmm support is a must to HT */
810 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
811 sband->ht_info.ht_supported) {
812 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
813 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
814 *pos++ = WLAN_EID_HT_CAPABILITY;
815 *pos++ = sizeof(struct ieee80211_ht_cap);
816 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
817 memcpy(pos, &tmp, sizeof(u16));
818 pos += sizeof(u16);
819 /* TODO: needs a define here for << 2 */
820 *pos++ = sband->ht_info.ampdu_factor |
821 (sband->ht_info.ampdu_density << 2);
822 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
823 }
824
825 kfree(ifsta->assocreq_ies);
826 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
827 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
828 if (ifsta->assocreq_ies)
829 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
830
831 ieee80211_sta_tx(dev, skb, 0);
832 }
833
834
835 static void ieee80211_send_deauth(struct net_device *dev,
836 struct ieee80211_if_sta *ifsta, u16 reason)
837 {
838 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
839 struct sk_buff *skb;
840 struct ieee80211_mgmt *mgmt;
841
842 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
843 if (!skb) {
844 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
845 "frame\n", dev->name);
846 return;
847 }
848 skb_reserve(skb, local->hw.extra_tx_headroom);
849
850 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
851 memset(mgmt, 0, 24);
852 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
853 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
854 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
855 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
856 IEEE80211_STYPE_DEAUTH);
857 skb_put(skb, 2);
858 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
859
860 ieee80211_sta_tx(dev, skb, 0);
861 }
862
863
864 static void ieee80211_send_disassoc(struct net_device *dev,
865 struct ieee80211_if_sta *ifsta, u16 reason)
866 {
867 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
868 struct sk_buff *skb;
869 struct ieee80211_mgmt *mgmt;
870
871 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
872 if (!skb) {
873 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
874 "frame\n", dev->name);
875 return;
876 }
877 skb_reserve(skb, local->hw.extra_tx_headroom);
878
879 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
880 memset(mgmt, 0, 24);
881 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
882 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
883 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
884 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
885 IEEE80211_STYPE_DISASSOC);
886 skb_put(skb, 2);
887 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
888
889 ieee80211_sta_tx(dev, skb, 0);
890 }
891
892
893 static int ieee80211_privacy_mismatch(struct net_device *dev,
894 struct ieee80211_if_sta *ifsta)
895 {
896 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
897 struct ieee80211_sta_bss *bss;
898 int bss_privacy;
899 int wep_privacy;
900 int privacy_invoked;
901
902 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
903 return 0;
904
905 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
906 local->hw.conf.channel->center_freq,
907 ifsta->ssid, ifsta->ssid_len);
908 if (!bss)
909 return 0;
910
911 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
912 wep_privacy = !!ieee80211_sta_wep_configured(dev);
913 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
914
915 ieee80211_rx_bss_put(dev, bss);
916
917 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
918 return 0;
919
920 return 1;
921 }
922
923
924 static void ieee80211_associate(struct net_device *dev,
925 struct ieee80211_if_sta *ifsta)
926 {
927 DECLARE_MAC_BUF(mac);
928
929 ifsta->assoc_tries++;
930 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
931 printk(KERN_DEBUG "%s: association with AP %s"
932 " timed out\n",
933 dev->name, print_mac(mac, ifsta->bssid));
934 ifsta->state = IEEE80211_DISABLED;
935 return;
936 }
937
938 ifsta->state = IEEE80211_ASSOCIATE;
939 printk(KERN_DEBUG "%s: associate with AP %s\n",
940 dev->name, print_mac(mac, ifsta->bssid));
941 if (ieee80211_privacy_mismatch(dev, ifsta)) {
942 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
943 "mixed-cell disabled - abort association\n", dev->name);
944 ifsta->state = IEEE80211_DISABLED;
945 return;
946 }
947
948 ieee80211_send_assoc(dev, ifsta);
949
950 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
951 }
952
953
954 static void ieee80211_associated(struct net_device *dev,
955 struct ieee80211_if_sta *ifsta)
956 {
957 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
958 struct sta_info *sta;
959 int disassoc;
960 DECLARE_MAC_BUF(mac);
961
962 /* TODO: start monitoring current AP signal quality and number of
963 * missed beacons. Scan other channels every now and then and search
964 * for better APs. */
965 /* TODO: remove expired BSSes */
966
967 ifsta->state = IEEE80211_ASSOCIATED;
968
969 rcu_read_lock();
970
971 sta = sta_info_get(local, ifsta->bssid);
972 if (!sta) {
973 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
974 dev->name, print_mac(mac, ifsta->bssid));
975 disassoc = 1;
976 } else {
977 disassoc = 0;
978 if (time_after(jiffies,
979 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
980 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
981 printk(KERN_DEBUG "%s: No ProbeResp from "
982 "current AP %s - assume out of "
983 "range\n",
984 dev->name, print_mac(mac, ifsta->bssid));
985 disassoc = 1;
986 sta_info_unlink(&sta);
987 } else
988 ieee80211_send_probe_req(dev, ifsta->bssid,
989 local->scan_ssid,
990 local->scan_ssid_len);
991 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
992 } else {
993 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
994 if (time_after(jiffies, ifsta->last_probe +
995 IEEE80211_PROBE_INTERVAL)) {
996 ifsta->last_probe = jiffies;
997 ieee80211_send_probe_req(dev, ifsta->bssid,
998 ifsta->ssid,
999 ifsta->ssid_len);
1000 }
1001 }
1002 }
1003
1004 rcu_read_unlock();
1005
1006 if (disassoc && sta)
1007 sta_info_destroy(sta);
1008
1009 if (disassoc) {
1010 ifsta->state = IEEE80211_DISABLED;
1011 ieee80211_set_associated(dev, ifsta, 0);
1012 } else {
1013 mod_timer(&ifsta->timer, jiffies +
1014 IEEE80211_MONITORING_INTERVAL);
1015 }
1016 }
1017
1018
1019 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1020 u8 *ssid, size_t ssid_len)
1021 {
1022 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1023 struct ieee80211_supported_band *sband;
1024 struct sk_buff *skb;
1025 struct ieee80211_mgmt *mgmt;
1026 u8 *pos, *supp_rates, *esupp_rates = NULL;
1027 int i;
1028
1029 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1030 if (!skb) {
1031 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1032 "request\n", dev->name);
1033 return;
1034 }
1035 skb_reserve(skb, local->hw.extra_tx_headroom);
1036
1037 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1038 memset(mgmt, 0, 24);
1039 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1040 IEEE80211_STYPE_PROBE_REQ);
1041 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1042 if (dst) {
1043 memcpy(mgmt->da, dst, ETH_ALEN);
1044 memcpy(mgmt->bssid, dst, ETH_ALEN);
1045 } else {
1046 memset(mgmt->da, 0xff, ETH_ALEN);
1047 memset(mgmt->bssid, 0xff, ETH_ALEN);
1048 }
1049 pos = skb_put(skb, 2 + ssid_len);
1050 *pos++ = WLAN_EID_SSID;
1051 *pos++ = ssid_len;
1052 memcpy(pos, ssid, ssid_len);
1053
1054 supp_rates = skb_put(skb, 2);
1055 supp_rates[0] = WLAN_EID_SUPP_RATES;
1056 supp_rates[1] = 0;
1057 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1058
1059 for (i = 0; i < sband->n_bitrates; i++) {
1060 struct ieee80211_rate *rate = &sband->bitrates[i];
1061 if (esupp_rates) {
1062 pos = skb_put(skb, 1);
1063 esupp_rates[1]++;
1064 } else if (supp_rates[1] == 8) {
1065 esupp_rates = skb_put(skb, 3);
1066 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1067 esupp_rates[1] = 1;
1068 pos = &esupp_rates[2];
1069 } else {
1070 pos = skb_put(skb, 1);
1071 supp_rates[1]++;
1072 }
1073 *pos = rate->bitrate / 5;
1074 }
1075
1076 ieee80211_sta_tx(dev, skb, 0);
1077 }
1078
1079
1080 static int ieee80211_sta_wep_configured(struct net_device *dev)
1081 {
1082 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1083 if (!sdata || !sdata->default_key ||
1084 sdata->default_key->conf.alg != ALG_WEP)
1085 return 0;
1086 return 1;
1087 }
1088
1089
1090 static void ieee80211_auth_completed(struct net_device *dev,
1091 struct ieee80211_if_sta *ifsta)
1092 {
1093 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1094 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1095 ieee80211_associate(dev, ifsta);
1096 }
1097
1098
1099 static void ieee80211_auth_challenge(struct net_device *dev,
1100 struct ieee80211_if_sta *ifsta,
1101 struct ieee80211_mgmt *mgmt,
1102 size_t len)
1103 {
1104 u8 *pos;
1105 struct ieee802_11_elems elems;
1106
1107 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1108 pos = mgmt->u.auth.variable;
1109 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1110 if (!elems.challenge) {
1111 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1112 "frame\n", dev->name);
1113 return;
1114 }
1115 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1116 elems.challenge_len + 2, 1);
1117 }
1118
1119 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1120 u8 dialog_token, u16 status, u16 policy,
1121 u16 buf_size, u16 timeout)
1122 {
1123 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1124 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1125 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1126 struct sk_buff *skb;
1127 struct ieee80211_mgmt *mgmt;
1128 u16 capab;
1129
1130 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1131
1132 if (!skb) {
1133 printk(KERN_DEBUG "%s: failed to allocate buffer "
1134 "for addba resp frame\n", dev->name);
1135 return;
1136 }
1137
1138 skb_reserve(skb, local->hw.extra_tx_headroom);
1139 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1140 memset(mgmt, 0, 24);
1141 memcpy(mgmt->da, da, ETH_ALEN);
1142 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1143 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1144 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1145 else
1146 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1147 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1148 IEEE80211_STYPE_ACTION);
1149
1150 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1151 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1152 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1153 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1154
1155 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1156 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1157 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1158
1159 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1160 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1161 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1162
1163 ieee80211_sta_tx(dev, skb, 0);
1164
1165 return;
1166 }
1167
1168 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1169 u16 tid, u8 dialog_token, u16 start_seq_num,
1170 u16 agg_size, u16 timeout)
1171 {
1172 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1173 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1174 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1175 struct sk_buff *skb;
1176 struct ieee80211_mgmt *mgmt;
1177 u16 capab;
1178
1179 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1180
1181 if (!skb) {
1182 printk(KERN_ERR "%s: failed to allocate buffer "
1183 "for addba request frame\n", dev->name);
1184 return;
1185 }
1186 skb_reserve(skb, local->hw.extra_tx_headroom);
1187 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1188 memset(mgmt, 0, 24);
1189 memcpy(mgmt->da, da, ETH_ALEN);
1190 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1191 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1192 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1193 else
1194 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1195
1196 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1197 IEEE80211_STYPE_ACTION);
1198
1199 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1200
1201 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1202 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1203
1204 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1205 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1206 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1207 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1208
1209 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1210
1211 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1212 mgmt->u.action.u.addba_req.start_seq_num =
1213 cpu_to_le16(start_seq_num << 4);
1214
1215 ieee80211_sta_tx(dev, skb, 0);
1216 }
1217
1218 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1219 struct ieee80211_mgmt *mgmt,
1220 size_t len)
1221 {
1222 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1223 struct ieee80211_hw *hw = &local->hw;
1224 struct ieee80211_conf *conf = &hw->conf;
1225 struct sta_info *sta;
1226 struct tid_ampdu_rx *tid_agg_rx;
1227 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1228 u8 dialog_token;
1229 int ret = -EOPNOTSUPP;
1230 DECLARE_MAC_BUF(mac);
1231
1232 rcu_read_lock();
1233
1234 sta = sta_info_get(local, mgmt->sa);
1235 if (!sta) {
1236 rcu_read_unlock();
1237 return;
1238 }
1239
1240 /* extract session parameters from addba request frame */
1241 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1242 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1243 start_seq_num =
1244 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1245
1246 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1247 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1248 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1249 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1250
1251 status = WLAN_STATUS_REQUEST_DECLINED;
1252
1253 /* sanity check for incoming parameters:
1254 * check if configuration can support the BA policy
1255 * and if buffer size does not exceeds max value */
1256 if (((ba_policy != 1)
1257 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1258 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1259 status = WLAN_STATUS_INVALID_QOS_PARAM;
1260 #ifdef CONFIG_MAC80211_HT_DEBUG
1261 if (net_ratelimit())
1262 printk(KERN_DEBUG "AddBA Req with bad params from "
1263 "%s on tid %u. policy %d, buffer size %d\n",
1264 print_mac(mac, mgmt->sa), tid, ba_policy,
1265 buf_size);
1266 #endif /* CONFIG_MAC80211_HT_DEBUG */
1267 goto end_no_lock;
1268 }
1269 /* determine default buffer size */
1270 if (buf_size == 0) {
1271 struct ieee80211_supported_band *sband;
1272
1273 sband = local->hw.wiphy->bands[conf->channel->band];
1274 buf_size = IEEE80211_MIN_AMPDU_BUF;
1275 buf_size = buf_size << sband->ht_info.ampdu_factor;
1276 }
1277
1278
1279 /* examine state machine */
1280 spin_lock_bh(&sta->lock);
1281
1282 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1283 #ifdef CONFIG_MAC80211_HT_DEBUG
1284 if (net_ratelimit())
1285 printk(KERN_DEBUG "unexpected AddBA Req from "
1286 "%s on tid %u\n",
1287 print_mac(mac, mgmt->sa), tid);
1288 #endif /* CONFIG_MAC80211_HT_DEBUG */
1289 goto end;
1290 }
1291
1292 /* prepare A-MPDU MLME for Rx aggregation */
1293 sta->ampdu_mlme.tid_rx[tid] =
1294 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1295 if (!sta->ampdu_mlme.tid_rx[tid]) {
1296 if (net_ratelimit())
1297 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1298 tid);
1299 goto end;
1300 }
1301 /* rx timer */
1302 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1303 sta_rx_agg_session_timer_expired;
1304 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1305 (unsigned long)&sta->timer_to_tid[tid];
1306 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1307
1308 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1309
1310 /* prepare reordering buffer */
1311 tid_agg_rx->reorder_buf =
1312 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1313 if (!tid_agg_rx->reorder_buf) {
1314 if (net_ratelimit())
1315 printk(KERN_ERR "can not allocate reordering buffer "
1316 "to tid %d\n", tid);
1317 kfree(sta->ampdu_mlme.tid_rx[tid]);
1318 goto end;
1319 }
1320 memset(tid_agg_rx->reorder_buf, 0,
1321 buf_size * sizeof(struct sk_buf *));
1322
1323 if (local->ops->ampdu_action)
1324 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1325 sta->addr, tid, &start_seq_num);
1326 #ifdef CONFIG_MAC80211_HT_DEBUG
1327 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1328 #endif /* CONFIG_MAC80211_HT_DEBUG */
1329
1330 if (ret) {
1331 kfree(tid_agg_rx->reorder_buf);
1332 kfree(tid_agg_rx);
1333 sta->ampdu_mlme.tid_rx[tid] = NULL;
1334 goto end;
1335 }
1336
1337 /* change state and send addba resp */
1338 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1339 tid_agg_rx->dialog_token = dialog_token;
1340 tid_agg_rx->ssn = start_seq_num;
1341 tid_agg_rx->head_seq_num = start_seq_num;
1342 tid_agg_rx->buf_size = buf_size;
1343 tid_agg_rx->timeout = timeout;
1344 tid_agg_rx->stored_mpdu_num = 0;
1345 status = WLAN_STATUS_SUCCESS;
1346 end:
1347 spin_unlock_bh(&sta->lock);
1348
1349 end_no_lock:
1350 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1351 dialog_token, status, 1, buf_size, timeout);
1352 rcu_read_unlock();
1353 }
1354
1355 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1356 struct ieee80211_mgmt *mgmt,
1357 size_t len)
1358 {
1359 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1360 struct ieee80211_hw *hw = &local->hw;
1361 struct sta_info *sta;
1362 u16 capab;
1363 u16 tid;
1364 u8 *state;
1365
1366 rcu_read_lock();
1367
1368 sta = sta_info_get(local, mgmt->sa);
1369 if (!sta) {
1370 rcu_read_unlock();
1371 return;
1372 }
1373
1374 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1375 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1376
1377 state = &sta->ampdu_mlme.tid_state_tx[tid];
1378
1379 spin_lock_bh(&sta->lock);
1380
1381 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1382 spin_unlock_bh(&sta->lock);
1383 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1384 "%d\n", *state);
1385 goto addba_resp_exit;
1386 }
1387
1388 if (mgmt->u.action.u.addba_resp.dialog_token !=
1389 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1390 spin_unlock_bh(&sta->lock);
1391 #ifdef CONFIG_MAC80211_HT_DEBUG
1392 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1393 #endif /* CONFIG_MAC80211_HT_DEBUG */
1394 goto addba_resp_exit;
1395 }
1396
1397 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1398 #ifdef CONFIG_MAC80211_HT_DEBUG
1399 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1400 #endif /* CONFIG_MAC80211_HT_DEBUG */
1401 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1402 == WLAN_STATUS_SUCCESS) {
1403 if (*state & HT_ADDBA_RECEIVED_MSK)
1404 printk(KERN_DEBUG "double addBA response\n");
1405
1406 *state |= HT_ADDBA_RECEIVED_MSK;
1407 sta->ampdu_mlme.addba_req_num[tid] = 0;
1408
1409 if (*state == HT_AGG_STATE_OPERATIONAL) {
1410 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1411 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1412 }
1413
1414 spin_unlock_bh(&sta->lock);
1415 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1416 } else {
1417 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1418
1419 sta->ampdu_mlme.addba_req_num[tid]++;
1420 /* this will allow the state check in stop_BA_session */
1421 *state = HT_AGG_STATE_OPERATIONAL;
1422 spin_unlock_bh(&sta->lock);
1423 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1424 WLAN_BACK_INITIATOR);
1425 }
1426
1427 addba_resp_exit:
1428 rcu_read_unlock();
1429 }
1430
1431 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1432 u16 initiator, u16 reason_code)
1433 {
1434 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1435 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1436 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1437 struct sk_buff *skb;
1438 struct ieee80211_mgmt *mgmt;
1439 u16 params;
1440
1441 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1442
1443 if (!skb) {
1444 printk(KERN_ERR "%s: failed to allocate buffer "
1445 "for delba frame\n", dev->name);
1446 return;
1447 }
1448
1449 skb_reserve(skb, local->hw.extra_tx_headroom);
1450 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1451 memset(mgmt, 0, 24);
1452 memcpy(mgmt->da, da, ETH_ALEN);
1453 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1454 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1455 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1456 else
1457 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1458 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1459 IEEE80211_STYPE_ACTION);
1460
1461 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1462
1463 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1464 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1465 params = (u16)(initiator << 11); /* bit 11 initiator */
1466 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1467
1468 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1469 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1470
1471 ieee80211_sta_tx(dev, skb, 0);
1472 }
1473
1474 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1475 u16 initiator, u16 reason)
1476 {
1477 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1478 struct ieee80211_hw *hw = &local->hw;
1479 struct sta_info *sta;
1480 int ret, i;
1481 DECLARE_MAC_BUF(mac);
1482
1483 rcu_read_lock();
1484
1485 sta = sta_info_get(local, ra);
1486 if (!sta) {
1487 rcu_read_unlock();
1488 return;
1489 }
1490
1491 /* check if TID is in operational state */
1492 spin_lock_bh(&sta->lock);
1493 if (sta->ampdu_mlme.tid_state_rx[tid]
1494 != HT_AGG_STATE_OPERATIONAL) {
1495 spin_unlock_bh(&sta->lock);
1496 rcu_read_unlock();
1497 return;
1498 }
1499 sta->ampdu_mlme.tid_state_rx[tid] =
1500 HT_AGG_STATE_REQ_STOP_BA_MSK |
1501 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1502 spin_unlock_bh(&sta->lock);
1503
1504 /* stop HW Rx aggregation. ampdu_action existence
1505 * already verified in session init so we add the BUG_ON */
1506 BUG_ON(!local->ops->ampdu_action);
1507
1508 #ifdef CONFIG_MAC80211_HT_DEBUG
1509 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1510 print_mac(mac, ra), tid);
1511 #endif /* CONFIG_MAC80211_HT_DEBUG */
1512
1513 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1514 ra, tid, NULL);
1515 if (ret)
1516 printk(KERN_DEBUG "HW problem - can not stop rx "
1517 "aggergation for tid %d\n", tid);
1518
1519 /* shutdown timer has not expired */
1520 if (initiator != WLAN_BACK_TIMER)
1521 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1522
1523 /* check if this is a self generated aggregation halt */
1524 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1525 ieee80211_send_delba(dev, ra, tid, 0, reason);
1526
1527 /* free the reordering buffer */
1528 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1529 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1530 /* release the reordered frames */
1531 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1532 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1533 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1534 }
1535 }
1536 /* free resources */
1537 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1538 kfree(sta->ampdu_mlme.tid_rx[tid]);
1539 sta->ampdu_mlme.tid_rx[tid] = NULL;
1540 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1541
1542 rcu_read_unlock();
1543 }
1544
1545
1546 static void ieee80211_sta_process_delba(struct net_device *dev,
1547 struct ieee80211_mgmt *mgmt, size_t len)
1548 {
1549 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1550 struct sta_info *sta;
1551 u16 tid, params;
1552 u16 initiator;
1553 DECLARE_MAC_BUF(mac);
1554
1555 rcu_read_lock();
1556
1557 sta = sta_info_get(local, mgmt->sa);
1558 if (!sta) {
1559 rcu_read_unlock();
1560 return;
1561 }
1562
1563 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1564 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1565 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1566
1567 #ifdef CONFIG_MAC80211_HT_DEBUG
1568 if (net_ratelimit())
1569 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1570 print_mac(mac, mgmt->sa),
1571 initiator ? "initiator" : "recipient", tid,
1572 mgmt->u.action.u.delba.reason_code);
1573 #endif /* CONFIG_MAC80211_HT_DEBUG */
1574
1575 if (initiator == WLAN_BACK_INITIATOR)
1576 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1577 WLAN_BACK_INITIATOR, 0);
1578 else { /* WLAN_BACK_RECIPIENT */
1579 spin_lock_bh(&sta->lock);
1580 sta->ampdu_mlme.tid_state_tx[tid] =
1581 HT_AGG_STATE_OPERATIONAL;
1582 spin_unlock_bh(&sta->lock);
1583 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1584 WLAN_BACK_RECIPIENT);
1585 }
1586 rcu_read_unlock();
1587 }
1588
1589 /*
1590 * After sending add Block Ack request we activated a timer until
1591 * add Block Ack response will arrive from the recipient.
1592 * If this timer expires sta_addba_resp_timer_expired will be executed.
1593 */
1594 void sta_addba_resp_timer_expired(unsigned long data)
1595 {
1596 /* not an elegant detour, but there is no choice as the timer passes
1597 * only one argument, and both sta_info and TID are needed, so init
1598 * flow in sta_info_create gives the TID as data, while the timer_to_id
1599 * array gives the sta through container_of */
1600 u16 tid = *(int *)data;
1601 struct sta_info *temp_sta = container_of((void *)data,
1602 struct sta_info, timer_to_tid[tid]);
1603
1604 struct ieee80211_local *local = temp_sta->local;
1605 struct ieee80211_hw *hw = &local->hw;
1606 struct sta_info *sta;
1607 u8 *state;
1608
1609 rcu_read_lock();
1610
1611 sta = sta_info_get(local, temp_sta->addr);
1612 if (!sta) {
1613 rcu_read_unlock();
1614 return;
1615 }
1616
1617 state = &sta->ampdu_mlme.tid_state_tx[tid];
1618 /* check if the TID waits for addBA response */
1619 spin_lock_bh(&sta->lock);
1620 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1621 spin_unlock_bh(&sta->lock);
1622 *state = HT_AGG_STATE_IDLE;
1623 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1624 "expecting addBA response there", tid);
1625 goto timer_expired_exit;
1626 }
1627
1628 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1629
1630 /* go through the state check in stop_BA_session */
1631 *state = HT_AGG_STATE_OPERATIONAL;
1632 spin_unlock_bh(&sta->lock);
1633 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1634 WLAN_BACK_INITIATOR);
1635
1636 timer_expired_exit:
1637 rcu_read_unlock();
1638 }
1639
1640 /*
1641 * After accepting the AddBA Request we activated a timer,
1642 * resetting it after each frame that arrives from the originator.
1643 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1644 */
1645 static void sta_rx_agg_session_timer_expired(unsigned long data)
1646 {
1647 /* not an elegant detour, but there is no choice as the timer passes
1648 * only one argument, and verious sta_info are needed here, so init
1649 * flow in sta_info_create gives the TID as data, while the timer_to_id
1650 * array gives the sta through container_of */
1651 u8 *ptid = (u8 *)data;
1652 u8 *timer_to_id = ptid - *ptid;
1653 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1654 timer_to_tid[0]);
1655
1656 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1657 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1658 (u16)*ptid, WLAN_BACK_TIMER,
1659 WLAN_REASON_QSTA_TIMEOUT);
1660 }
1661
1662 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1663 {
1664 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1665 int i;
1666
1667 for (i = 0; i < STA_TID_NUM; i++) {
1668 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1669 WLAN_BACK_INITIATOR);
1670 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1671 WLAN_BACK_RECIPIENT,
1672 WLAN_REASON_QSTA_LEAVE_QBSS);
1673 }
1674 }
1675
1676 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1677 struct ieee80211_if_sta *ifsta,
1678 struct ieee80211_mgmt *mgmt,
1679 size_t len)
1680 {
1681 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1682 u16 auth_alg, auth_transaction, status_code;
1683 DECLARE_MAC_BUF(mac);
1684
1685 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1686 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1687 printk(KERN_DEBUG "%s: authentication frame received from "
1688 "%s, but not in authenticate state - ignored\n",
1689 dev->name, print_mac(mac, mgmt->sa));
1690 return;
1691 }
1692
1693 if (len < 24 + 6) {
1694 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1695 "received from %s - ignored\n",
1696 dev->name, len, print_mac(mac, mgmt->sa));
1697 return;
1698 }
1699
1700 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1701 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1702 printk(KERN_DEBUG "%s: authentication frame received from "
1703 "unknown AP (SA=%s BSSID=%s) - "
1704 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1705 print_mac(mac, mgmt->bssid));
1706 return;
1707 }
1708
1709 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1710 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1711 printk(KERN_DEBUG "%s: authentication frame received from "
1712 "unknown BSSID (SA=%s BSSID=%s) - "
1713 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1714 print_mac(mac, mgmt->bssid));
1715 return;
1716 }
1717
1718 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1719 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1720 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1721
1722 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1723 "transaction=%d status=%d)\n",
1724 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1725 auth_transaction, status_code);
1726
1727 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1728 /* IEEE 802.11 standard does not require authentication in IBSS
1729 * networks and most implementations do not seem to use it.
1730 * However, try to reply to authentication attempts if someone
1731 * has actually implemented this.
1732 * TODO: Could implement shared key authentication. */
1733 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1734 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1735 "frame (alg=%d transaction=%d)\n",
1736 dev->name, auth_alg, auth_transaction);
1737 return;
1738 }
1739 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1740 }
1741
1742 if (auth_alg != ifsta->auth_alg ||
1743 auth_transaction != ifsta->auth_transaction) {
1744 printk(KERN_DEBUG "%s: unexpected authentication frame "
1745 "(alg=%d transaction=%d)\n",
1746 dev->name, auth_alg, auth_transaction);
1747 return;
1748 }
1749
1750 if (status_code != WLAN_STATUS_SUCCESS) {
1751 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1752 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1753 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1754 u8 algs[3];
1755 const int num_algs = ARRAY_SIZE(algs);
1756 int i, pos;
1757 algs[0] = algs[1] = algs[2] = 0xff;
1758 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1759 algs[0] = WLAN_AUTH_OPEN;
1760 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1761 algs[1] = WLAN_AUTH_SHARED_KEY;
1762 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1763 algs[2] = WLAN_AUTH_LEAP;
1764 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1765 pos = 0;
1766 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1767 pos = 1;
1768 else
1769 pos = 2;
1770 for (i = 0; i < num_algs; i++) {
1771 pos++;
1772 if (pos >= num_algs)
1773 pos = 0;
1774 if (algs[pos] == ifsta->auth_alg ||
1775 algs[pos] == 0xff)
1776 continue;
1777 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1778 !ieee80211_sta_wep_configured(dev))
1779 continue;
1780 ifsta->auth_alg = algs[pos];
1781 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1782 "next try\n",
1783 dev->name, ifsta->auth_alg);
1784 break;
1785 }
1786 }
1787 return;
1788 }
1789
1790 switch (ifsta->auth_alg) {
1791 case WLAN_AUTH_OPEN:
1792 case WLAN_AUTH_LEAP:
1793 ieee80211_auth_completed(dev, ifsta);
1794 break;
1795 case WLAN_AUTH_SHARED_KEY:
1796 if (ifsta->auth_transaction == 4)
1797 ieee80211_auth_completed(dev, ifsta);
1798 else
1799 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1800 break;
1801 }
1802 }
1803
1804
1805 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1806 struct ieee80211_if_sta *ifsta,
1807 struct ieee80211_mgmt *mgmt,
1808 size_t len)
1809 {
1810 u16 reason_code;
1811 DECLARE_MAC_BUF(mac);
1812
1813 if (len < 24 + 2) {
1814 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1815 "received from %s - ignored\n",
1816 dev->name, len, print_mac(mac, mgmt->sa));
1817 return;
1818 }
1819
1820 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1821 printk(KERN_DEBUG "%s: deauthentication frame received from "
1822 "unknown AP (SA=%s BSSID=%s) - "
1823 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1824 print_mac(mac, mgmt->bssid));
1825 return;
1826 }
1827
1828 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1829
1830 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1831 " (reason=%d)\n",
1832 dev->name, print_mac(mac, mgmt->sa), reason_code);
1833
1834 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1835 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1836
1837 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1838 ifsta->state == IEEE80211_ASSOCIATE ||
1839 ifsta->state == IEEE80211_ASSOCIATED) {
1840 ifsta->state = IEEE80211_AUTHENTICATE;
1841 mod_timer(&ifsta->timer, jiffies +
1842 IEEE80211_RETRY_AUTH_INTERVAL);
1843 }
1844
1845 ieee80211_set_disassoc(dev, ifsta, 1);
1846 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1847 }
1848
1849
1850 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1851 struct ieee80211_if_sta *ifsta,
1852 struct ieee80211_mgmt *mgmt,
1853 size_t len)
1854 {
1855 u16 reason_code;
1856 DECLARE_MAC_BUF(mac);
1857
1858 if (len < 24 + 2) {
1859 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1860 "received from %s - ignored\n",
1861 dev->name, len, print_mac(mac, mgmt->sa));
1862 return;
1863 }
1864
1865 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1866 printk(KERN_DEBUG "%s: disassociation frame received from "
1867 "unknown AP (SA=%s BSSID=%s) - "
1868 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1869 print_mac(mac, mgmt->bssid));
1870 return;
1871 }
1872
1873 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1874
1875 printk(KERN_DEBUG "%s: RX disassociation from %s"
1876 " (reason=%d)\n",
1877 dev->name, print_mac(mac, mgmt->sa), reason_code);
1878
1879 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1880 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1881
1882 if (ifsta->state == IEEE80211_ASSOCIATED) {
1883 ifsta->state = IEEE80211_ASSOCIATE;
1884 mod_timer(&ifsta->timer, jiffies +
1885 IEEE80211_RETRY_AUTH_INTERVAL);
1886 }
1887
1888 ieee80211_set_disassoc(dev, ifsta, 0);
1889 }
1890
1891
1892 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1893 struct ieee80211_if_sta *ifsta,
1894 struct ieee80211_mgmt *mgmt,
1895 size_t len,
1896 int reassoc)
1897 {
1898 struct ieee80211_local *local = sdata->local;
1899 struct net_device *dev = sdata->dev;
1900 struct ieee80211_supported_band *sband;
1901 struct sta_info *sta;
1902 u64 rates, basic_rates;
1903 u16 capab_info, status_code, aid;
1904 struct ieee802_11_elems elems;
1905 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1906 u8 *pos;
1907 int i, j;
1908 DECLARE_MAC_BUF(mac);
1909 bool have_higher_than_11mbit = false;
1910
1911 /* AssocResp and ReassocResp have identical structure, so process both
1912 * of them in this function. */
1913
1914 if (ifsta->state != IEEE80211_ASSOCIATE) {
1915 printk(KERN_DEBUG "%s: association frame received from "
1916 "%s, but not in associate state - ignored\n",
1917 dev->name, print_mac(mac, mgmt->sa));
1918 return;
1919 }
1920
1921 if (len < 24 + 6) {
1922 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1923 "received from %s - ignored\n",
1924 dev->name, len, print_mac(mac, mgmt->sa));
1925 return;
1926 }
1927
1928 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1929 printk(KERN_DEBUG "%s: association frame received from "
1930 "unknown AP (SA=%s BSSID=%s) - "
1931 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1932 print_mac(mac, mgmt->bssid));
1933 return;
1934 }
1935
1936 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1937 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1938 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1939
1940 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1941 "status=%d aid=%d)\n",
1942 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1943 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1944
1945 if (status_code != WLAN_STATUS_SUCCESS) {
1946 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1947 dev->name, status_code);
1948 /* if this was a reassociation, ensure we try a "full"
1949 * association next time. This works around some broken APs
1950 * which do not correctly reject reassociation requests. */
1951 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1952 return;
1953 }
1954
1955 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1956 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1957 "set\n", dev->name, aid);
1958 aid &= ~(BIT(15) | BIT(14));
1959
1960 pos = mgmt->u.assoc_resp.variable;
1961 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1962
1963 if (!elems.supp_rates) {
1964 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1965 dev->name);
1966 return;
1967 }
1968
1969 printk(KERN_DEBUG "%s: associated\n", dev->name);
1970 ifsta->aid = aid;
1971 ifsta->ap_capab = capab_info;
1972
1973 kfree(ifsta->assocresp_ies);
1974 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1975 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1976 if (ifsta->assocresp_ies)
1977 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1978
1979 rcu_read_lock();
1980
1981 /* Add STA entry for the AP */
1982 sta = sta_info_get(local, ifsta->bssid);
1983 if (!sta) {
1984 struct ieee80211_sta_bss *bss;
1985 int err;
1986
1987 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1988 if (!sta) {
1989 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1990 " the AP\n", dev->name);
1991 rcu_read_unlock();
1992 return;
1993 }
1994 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1995 local->hw.conf.channel->center_freq,
1996 ifsta->ssid, ifsta->ssid_len);
1997 if (bss) {
1998 sta->last_signal = bss->signal;
1999 sta->last_qual = bss->qual;
2000 sta->last_noise = bss->noise;
2001 ieee80211_rx_bss_put(dev, bss);
2002 }
2003
2004 err = sta_info_insert(sta);
2005 if (err) {
2006 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2007 " the AP (error %d)\n", dev->name, err);
2008 rcu_read_unlock();
2009 return;
2010 }
2011 }
2012
2013 /*
2014 * FIXME: Do we really need to update the sta_info's information here?
2015 * We already know about the AP (we found it in our list) so it
2016 * should already be filled with the right info, no?
2017 * As is stands, all this is racy because typically we assume
2018 * the information that is filled in here (except flags) doesn't
2019 * change while a STA structure is alive. As such, it should move
2020 * to between the sta_info_alloc() and sta_info_insert() above.
2021 */
2022
2023 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2024 WLAN_STA_AUTHORIZED);
2025
2026 rates = 0;
2027 basic_rates = 0;
2028 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2029
2030 for (i = 0; i < elems.supp_rates_len; i++) {
2031 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2032
2033 if (rate > 110)
2034 have_higher_than_11mbit = true;
2035
2036 for (j = 0; j < sband->n_bitrates; j++) {
2037 if (sband->bitrates[j].bitrate == rate)
2038 rates |= BIT(j);
2039 if (elems.supp_rates[i] & 0x80)
2040 basic_rates |= BIT(j);
2041 }
2042 }
2043
2044 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2045 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2046
2047 if (rate > 110)
2048 have_higher_than_11mbit = true;
2049
2050 for (j = 0; j < sband->n_bitrates; j++) {
2051 if (sband->bitrates[j].bitrate == rate)
2052 rates |= BIT(j);
2053 if (elems.ext_supp_rates[i] & 0x80)
2054 basic_rates |= BIT(j);
2055 }
2056 }
2057
2058 sta->supp_rates[local->hw.conf.channel->band] = rates;
2059 sdata->basic_rates = basic_rates;
2060
2061 /* cf. IEEE 802.11 9.2.12 */
2062 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2063 have_higher_than_11mbit)
2064 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2065 else
2066 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2067
2068 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2069 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2070 struct ieee80211_ht_bss_info bss_info;
2071 ieee80211_ht_cap_ie_to_ht_info(
2072 (struct ieee80211_ht_cap *)
2073 elems.ht_cap_elem, &sta->ht_info);
2074 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2075 (struct ieee80211_ht_addt_info *)
2076 elems.ht_info_elem, &bss_info);
2077 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2078 }
2079
2080 rate_control_rate_init(sta, local);
2081
2082 if (elems.wmm_param) {
2083 set_sta_flags(sta, WLAN_STA_WME);
2084 rcu_read_unlock();
2085 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2086 elems.wmm_param_len);
2087 } else
2088 rcu_read_unlock();
2089
2090 /* set AID and assoc capability,
2091 * ieee80211_set_associated() will tell the driver */
2092 bss_conf->aid = aid;
2093 bss_conf->assoc_capability = capab_info;
2094 ieee80211_set_associated(dev, ifsta, 1);
2095
2096 ieee80211_associated(dev, ifsta);
2097 }
2098
2099
2100 /* Caller must hold local->sta_bss_lock */
2101 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2102 struct ieee80211_sta_bss *bss)
2103 {
2104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2105 u8 hash_idx;
2106
2107 if (bss_mesh_cfg(bss))
2108 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2109 bss_mesh_id_len(bss));
2110 else
2111 hash_idx = STA_HASH(bss->bssid);
2112
2113 bss->hnext = local->sta_bss_hash[hash_idx];
2114 local->sta_bss_hash[hash_idx] = bss;
2115 }
2116
2117
2118 /* Caller must hold local->sta_bss_lock */
2119 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2120 struct ieee80211_sta_bss *bss)
2121 {
2122 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2123 struct ieee80211_sta_bss *b, *prev = NULL;
2124 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2125 while (b) {
2126 if (b == bss) {
2127 if (!prev)
2128 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2129 bss->hnext;
2130 else
2131 prev->hnext = bss->hnext;
2132 break;
2133 }
2134 prev = b;
2135 b = b->hnext;
2136 }
2137 }
2138
2139
2140 static struct ieee80211_sta_bss *
2141 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2142 u8 *ssid, u8 ssid_len)
2143 {
2144 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2145 struct ieee80211_sta_bss *bss;
2146
2147 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2148 if (!bss)
2149 return NULL;
2150 atomic_inc(&bss->users);
2151 atomic_inc(&bss->users);
2152 memcpy(bss->bssid, bssid, ETH_ALEN);
2153 bss->freq = freq;
2154 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2155 memcpy(bss->ssid, ssid, ssid_len);
2156 bss->ssid_len = ssid_len;
2157 }
2158
2159 spin_lock_bh(&local->sta_bss_lock);
2160 /* TODO: order by RSSI? */
2161 list_add_tail(&bss->list, &local->sta_bss_list);
2162 __ieee80211_rx_bss_hash_add(dev, bss);
2163 spin_unlock_bh(&local->sta_bss_lock);
2164 return bss;
2165 }
2166
2167 static struct ieee80211_sta_bss *
2168 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2169 u8 *ssid, u8 ssid_len)
2170 {
2171 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2172 struct ieee80211_sta_bss *bss;
2173
2174 spin_lock_bh(&local->sta_bss_lock);
2175 bss = local->sta_bss_hash[STA_HASH(bssid)];
2176 while (bss) {
2177 if (!bss_mesh_cfg(bss) &&
2178 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2179 bss->freq == freq &&
2180 bss->ssid_len == ssid_len &&
2181 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2182 atomic_inc(&bss->users);
2183 break;
2184 }
2185 bss = bss->hnext;
2186 }
2187 spin_unlock_bh(&local->sta_bss_lock);
2188 return bss;
2189 }
2190
2191 #ifdef CONFIG_MAC80211_MESH
2192 static struct ieee80211_sta_bss *
2193 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2194 u8 *mesh_cfg, int freq)
2195 {
2196 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2197 struct ieee80211_sta_bss *bss;
2198
2199 spin_lock_bh(&local->sta_bss_lock);
2200 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2201 while (bss) {
2202 if (bss_mesh_cfg(bss) &&
2203 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2204 bss->freq == freq &&
2205 mesh_id_len == bss->mesh_id_len &&
2206 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2207 mesh_id_len))) {
2208 atomic_inc(&bss->users);
2209 break;
2210 }
2211 bss = bss->hnext;
2212 }
2213 spin_unlock_bh(&local->sta_bss_lock);
2214 return bss;
2215 }
2216
2217 static struct ieee80211_sta_bss *
2218 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2219 u8 *mesh_cfg, int mesh_config_len, int freq)
2220 {
2221 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2222 struct ieee80211_sta_bss *bss;
2223
2224 if (mesh_config_len != MESH_CFG_LEN)
2225 return NULL;
2226
2227 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2228 if (!bss)
2229 return NULL;
2230
2231 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2232 if (!bss->mesh_cfg) {
2233 kfree(bss);
2234 return NULL;
2235 }
2236
2237 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2238 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2239 if (!bss->mesh_id) {
2240 kfree(bss->mesh_cfg);
2241 kfree(bss);
2242 return NULL;
2243 }
2244 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2245 }
2246
2247 atomic_inc(&bss->users);
2248 atomic_inc(&bss->users);
2249 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2250 bss->mesh_id_len = mesh_id_len;
2251 bss->freq = freq;
2252 spin_lock_bh(&local->sta_bss_lock);
2253 /* TODO: order by RSSI? */
2254 list_add_tail(&bss->list, &local->sta_bss_list);
2255 __ieee80211_rx_bss_hash_add(dev, bss);
2256 spin_unlock_bh(&local->sta_bss_lock);
2257 return bss;
2258 }
2259 #endif
2260
2261 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2262 {
2263 kfree(bss->wpa_ie);
2264 kfree(bss->rsn_ie);
2265 kfree(bss->wmm_ie);
2266 kfree(bss->ht_ie);
2267 kfree(bss_mesh_id(bss));
2268 kfree(bss_mesh_cfg(bss));
2269 kfree(bss);
2270 }
2271
2272
2273 static void ieee80211_rx_bss_put(struct net_device *dev,
2274 struct ieee80211_sta_bss *bss)
2275 {
2276 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2277
2278 local_bh_disable();
2279 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2280 local_bh_enable();
2281 return;
2282 }
2283
2284 __ieee80211_rx_bss_hash_del(dev, bss);
2285 list_del(&bss->list);
2286 spin_unlock_bh(&local->sta_bss_lock);
2287 ieee80211_rx_bss_free(bss);
2288 }
2289
2290
2291 void ieee80211_rx_bss_list_init(struct net_device *dev)
2292 {
2293 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2294 spin_lock_init(&local->sta_bss_lock);
2295 INIT_LIST_HEAD(&local->sta_bss_list);
2296 }
2297
2298
2299 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2300 {
2301 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2302 struct ieee80211_sta_bss *bss, *tmp;
2303
2304 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2305 ieee80211_rx_bss_put(dev, bss);
2306 }
2307
2308
2309 static int ieee80211_sta_join_ibss(struct net_device *dev,
2310 struct ieee80211_if_sta *ifsta,
2311 struct ieee80211_sta_bss *bss)
2312 {
2313 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2314 int res, rates, i, j;
2315 struct sk_buff *skb;
2316 struct ieee80211_mgmt *mgmt;
2317 struct ieee80211_tx_info *control;
2318 struct rate_selection ratesel;
2319 u8 *pos;
2320 struct ieee80211_sub_if_data *sdata;
2321 struct ieee80211_supported_band *sband;
2322
2323 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2324
2325 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2326
2327 /* Remove possible STA entries from other IBSS networks. */
2328 sta_info_flush_delayed(sdata);
2329
2330 if (local->ops->reset_tsf) {
2331 /* Reset own TSF to allow time synchronization work. */
2332 local->ops->reset_tsf(local_to_hw(local));
2333 }
2334 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2335 res = ieee80211_if_config(dev);
2336 if (res)
2337 return res;
2338
2339 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2340
2341 sdata->drop_unencrypted = bss->capability &
2342 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2343
2344 res = ieee80211_set_freq(local, bss->freq);
2345
2346 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2347 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2348 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2349 return -1;
2350 }
2351
2352 /* Set beacon template */
2353 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2354 do {
2355 if (!skb)
2356 break;
2357
2358 skb_reserve(skb, local->hw.extra_tx_headroom);
2359
2360 mgmt = (struct ieee80211_mgmt *)
2361 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2362 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2363 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2364 IEEE80211_STYPE_BEACON);
2365 memset(mgmt->da, 0xff, ETH_ALEN);
2366 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2367 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2368 mgmt->u.beacon.beacon_int =
2369 cpu_to_le16(local->hw.conf.beacon_int);
2370 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2371
2372 pos = skb_put(skb, 2 + ifsta->ssid_len);
2373 *pos++ = WLAN_EID_SSID;
2374 *pos++ = ifsta->ssid_len;
2375 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2376
2377 rates = bss->supp_rates_len;
2378 if (rates > 8)
2379 rates = 8;
2380 pos = skb_put(skb, 2 + rates);
2381 *pos++ = WLAN_EID_SUPP_RATES;
2382 *pos++ = rates;
2383 memcpy(pos, bss->supp_rates, rates);
2384
2385 if (bss->band == IEEE80211_BAND_2GHZ) {
2386 pos = skb_put(skb, 2 + 1);
2387 *pos++ = WLAN_EID_DS_PARAMS;
2388 *pos++ = 1;
2389 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2390 }
2391
2392 pos = skb_put(skb, 2 + 2);
2393 *pos++ = WLAN_EID_IBSS_PARAMS;
2394 *pos++ = 2;
2395 /* FIX: set ATIM window based on scan results */
2396 *pos++ = 0;
2397 *pos++ = 0;
2398
2399 if (bss->supp_rates_len > 8) {
2400 rates = bss->supp_rates_len - 8;
2401 pos = skb_put(skb, 2 + rates);
2402 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2403 *pos++ = rates;
2404 memcpy(pos, &bss->supp_rates[8], rates);
2405 }
2406
2407 control = IEEE80211_SKB_CB(skb);
2408
2409 rate_control_get_rate(dev, sband, skb, &ratesel);
2410 if (ratesel.rate_idx < 0) {
2411 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2412 "for IBSS beacon\n", dev->name);
2413 break;
2414 }
2415 control->control.vif = &sdata->vif;
2416 control->tx_rate_idx = ratesel.rate_idx;
2417 if (sdata->bss_conf.use_short_preamble &&
2418 sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE)
2419 control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE;
2420 control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2421 control->flags |= IEEE80211_TX_CTL_NO_ACK;
2422 control->control.retry_limit = 1;
2423
2424 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2425 if (ifsta->probe_resp) {
2426 mgmt = (struct ieee80211_mgmt *)
2427 ifsta->probe_resp->data;
2428 mgmt->frame_control =
2429 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2430 IEEE80211_STYPE_PROBE_RESP);
2431 } else {
2432 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2433 "template for IBSS\n", dev->name);
2434 }
2435
2436 if (local->ops->beacon_update &&
2437 local->ops->beacon_update(local_to_hw(local), skb) == 0) {
2438 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2439 "template\n", dev->name);
2440 skb = NULL;
2441 }
2442
2443 rates = 0;
2444 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2445 for (i = 0; i < bss->supp_rates_len; i++) {
2446 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2447 for (j = 0; j < sband->n_bitrates; j++)
2448 if (sband->bitrates[j].bitrate == bitrate)
2449 rates |= BIT(j);
2450 }
2451 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2452
2453 ieee80211_sta_def_wmm_params(dev, bss, 1);
2454 } while (0);
2455
2456 if (skb) {
2457 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2458 "template\n", dev->name);
2459 dev_kfree_skb(skb);
2460 }
2461
2462 ifsta->state = IEEE80211_IBSS_JOINED;
2463 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2464
2465 ieee80211_rx_bss_put(dev, bss);
2466
2467 return res;
2468 }
2469
2470 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2471 struct ieee802_11_elems *elems,
2472 enum ieee80211_band band)
2473 {
2474 struct ieee80211_supported_band *sband;
2475 struct ieee80211_rate *bitrates;
2476 size_t num_rates;
2477 u64 supp_rates;
2478 int i, j;
2479 sband = local->hw.wiphy->bands[band];
2480
2481 if (!sband) {
2482 WARN_ON(1);
2483 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2484 }
2485
2486 bitrates = sband->bitrates;
2487 num_rates = sband->n_bitrates;
2488 supp_rates = 0;
2489 for (i = 0; i < elems->supp_rates_len +
2490 elems->ext_supp_rates_len; i++) {
2491 u8 rate = 0;
2492 int own_rate;
2493 if (i < elems->supp_rates_len)
2494 rate = elems->supp_rates[i];
2495 else if (elems->ext_supp_rates)
2496 rate = elems->ext_supp_rates
2497 [i - elems->supp_rates_len];
2498 own_rate = 5 * (rate & 0x7f);
2499 for (j = 0; j < num_rates; j++)
2500 if (bitrates[j].bitrate == own_rate)
2501 supp_rates |= BIT(j);
2502 }
2503 return supp_rates;
2504 }
2505
2506
2507 static void ieee80211_rx_bss_info(struct net_device *dev,
2508 struct ieee80211_mgmt *mgmt,
2509 size_t len,
2510 struct ieee80211_rx_status *rx_status,
2511 int beacon)
2512 {
2513 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2514 struct ieee802_11_elems elems;
2515 size_t baselen;
2516 int freq, clen;
2517 struct ieee80211_sta_bss *bss;
2518 struct sta_info *sta;
2519 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2520 u64 beacon_timestamp, rx_timestamp;
2521 struct ieee80211_channel *channel;
2522 DECLARE_MAC_BUF(mac);
2523 DECLARE_MAC_BUF(mac2);
2524
2525 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2526 return; /* ignore ProbeResp to foreign address */
2527
2528 #if 0
2529 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2530 dev->name, beacon ? "Beacon" : "Probe Response",
2531 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2532 #endif
2533
2534 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2535 if (baselen > len)
2536 return;
2537
2538 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2539 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2540
2541 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2542 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2543 u64 rates = ieee80211_sta_get_rates(local, &elems,
2544 rx_status->band);
2545
2546 mesh_neighbour_update(mgmt->sa, rates, dev,
2547 mesh_peer_accepts_plinks(&elems, dev));
2548 }
2549
2550 rcu_read_lock();
2551
2552 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2553 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2554 (sta = sta_info_get(local, mgmt->sa))) {
2555 u64 prev_rates;
2556 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2557 rx_status->band);
2558
2559 prev_rates = sta->supp_rates[rx_status->band];
2560 sta->supp_rates[rx_status->band] &= supp_rates;
2561 if (sta->supp_rates[rx_status->band] == 0) {
2562 /* No matching rates - this should not really happen.
2563 * Make sure that at least one rate is marked
2564 * supported to avoid issues with TX rate ctrl. */
2565 sta->supp_rates[rx_status->band] =
2566 sdata->u.sta.supp_rates_bits[rx_status->band];
2567 }
2568 if (sta->supp_rates[rx_status->band] != prev_rates) {
2569 printk(KERN_DEBUG "%s: updated supp_rates set for "
2570 "%s based on beacon info (0x%llx & 0x%llx -> "
2571 "0x%llx)\n",
2572 dev->name, print_mac(mac, sta->addr),
2573 (unsigned long long) prev_rates,
2574 (unsigned long long) supp_rates,
2575 (unsigned long long) sta->supp_rates[rx_status->band]);
2576 }
2577 }
2578
2579 rcu_read_unlock();
2580
2581 if (elems.ds_params && elems.ds_params_len == 1)
2582 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2583 else
2584 freq = rx_status->freq;
2585
2586 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2587
2588 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2589 return;
2590
2591 #ifdef CONFIG_MAC80211_MESH
2592 if (elems.mesh_config)
2593 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2594 elems.mesh_id_len, elems.mesh_config, freq);
2595 else
2596 #endif
2597 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2598 elems.ssid, elems.ssid_len);
2599 if (!bss) {
2600 #ifdef CONFIG_MAC80211_MESH
2601 if (elems.mesh_config)
2602 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2603 elems.mesh_id_len, elems.mesh_config,
2604 elems.mesh_config_len, freq);
2605 else
2606 #endif
2607 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2608 elems.ssid, elems.ssid_len);
2609 if (!bss)
2610 return;
2611 } else {
2612 #if 0
2613 /* TODO: order by RSSI? */
2614 spin_lock_bh(&local->sta_bss_lock);
2615 list_move_tail(&bss->list, &local->sta_bss_list);
2616 spin_unlock_bh(&local->sta_bss_lock);
2617 #endif
2618 }
2619
2620 /* save the ERP value so that it is available at association time */
2621 if (elems.erp_info && elems.erp_info_len >= 1) {
2622 bss->erp_value = elems.erp_info[0];
2623 bss->has_erp_value = 1;
2624 }
2625
2626 if (elems.ht_cap_elem &&
2627 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2628 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2629 kfree(bss->ht_ie);
2630 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2631 if (bss->ht_ie) {
2632 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2633 elems.ht_cap_elem_len + 2);
2634 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2635 } else
2636 bss->ht_ie_len = 0;
2637 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2638 kfree(bss->ht_ie);
2639 bss->ht_ie = NULL;
2640 bss->ht_ie_len = 0;
2641 }
2642
2643 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2644 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2645
2646 bss->supp_rates_len = 0;
2647 if (elems.supp_rates) {
2648 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2649 if (clen > elems.supp_rates_len)
2650 clen = elems.supp_rates_len;
2651 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2652 clen);
2653 bss->supp_rates_len += clen;
2654 }
2655 if (elems.ext_supp_rates) {
2656 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2657 if (clen > elems.ext_supp_rates_len)
2658 clen = elems.ext_supp_rates_len;
2659 memcpy(&bss->supp_rates[bss->supp_rates_len],
2660 elems.ext_supp_rates, clen);
2661 bss->supp_rates_len += clen;
2662 }
2663
2664 bss->band = rx_status->band;
2665
2666 bss->timestamp = beacon_timestamp;
2667 bss->last_update = jiffies;
2668 bss->signal = rx_status->signal;
2669 bss->noise = rx_status->noise;
2670 bss->qual = rx_status->qual;
2671 if (!beacon && !bss->probe_resp)
2672 bss->probe_resp = true;
2673
2674 /*
2675 * In STA mode, the remaining parameters should not be overridden
2676 * by beacons because they're not necessarily accurate there.
2677 */
2678 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2679 bss->probe_resp && beacon) {
2680 ieee80211_rx_bss_put(dev, bss);
2681 return;
2682 }
2683
2684 if (elems.wpa &&
2685 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2686 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2687 kfree(bss->wpa_ie);
2688 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2689 if (bss->wpa_ie) {
2690 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2691 bss->wpa_ie_len = elems.wpa_len + 2;
2692 } else
2693 bss->wpa_ie_len = 0;
2694 } else if (!elems.wpa && bss->wpa_ie) {
2695 kfree(bss->wpa_ie);
2696 bss->wpa_ie = NULL;
2697 bss->wpa_ie_len = 0;
2698 }
2699
2700 if (elems.rsn &&
2701 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2702 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2703 kfree(bss->rsn_ie);
2704 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2705 if (bss->rsn_ie) {
2706 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2707 bss->rsn_ie_len = elems.rsn_len + 2;
2708 } else
2709 bss->rsn_ie_len = 0;
2710 } else if (!elems.rsn && bss->rsn_ie) {
2711 kfree(bss->rsn_ie);
2712 bss->rsn_ie = NULL;
2713 bss->rsn_ie_len = 0;
2714 }
2715
2716 /*
2717 * Cf.
2718 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2719 *
2720 * quoting:
2721 *
2722 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2723 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2724 * Alliance (September 1, 2004) is incorporated by reference herein.
2725 * The inclusion of the WMM Parameters in probe responses and
2726 * association responses is mandatory for WMM enabled networks. The
2727 * inclusion of the WMM Parameters in beacons, however, is optional.
2728 */
2729
2730 if (elems.wmm_param &&
2731 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2732 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2733 kfree(bss->wmm_ie);
2734 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2735 if (bss->wmm_ie) {
2736 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2737 elems.wmm_param_len + 2);
2738 bss->wmm_ie_len = elems.wmm_param_len + 2;
2739 } else
2740 bss->wmm_ie_len = 0;
2741 } else if (elems.wmm_info &&
2742 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2743 memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2744 /* As for certain AP's Fifth bit is not set in WMM IE in
2745 * beacon frames.So while parsing the beacon frame the
2746 * wmm_info structure is used instead of wmm_param.
2747 * wmm_info structure was never used to set bss->wmm_ie.
2748 * This code fixes this problem by copying the WME
2749 * information from wmm_info to bss->wmm_ie and enabling
2750 * n-band association.
2751 */
2752 kfree(bss->wmm_ie);
2753 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2754 if (bss->wmm_ie) {
2755 memcpy(bss->wmm_ie, elems.wmm_info - 2,
2756 elems.wmm_info_len + 2);
2757 bss->wmm_ie_len = elems.wmm_info_len + 2;
2758 } else
2759 bss->wmm_ie_len = 0;
2760 } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2761 kfree(bss->wmm_ie);
2762 bss->wmm_ie = NULL;
2763 bss->wmm_ie_len = 0;
2764 }
2765
2766 /* check if we need to merge IBSS */
2767 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2768 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2769 bss->capability & WLAN_CAPABILITY_IBSS &&
2770 bss->freq == local->oper_channel->center_freq &&
2771 elems.ssid_len == sdata->u.sta.ssid_len &&
2772 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2773 if (rx_status->flag & RX_FLAG_TSFT) {
2774 /* in order for correct IBSS merging we need mactime
2775 *
2776 * since mactime is defined as the time the first data
2777 * symbol of the frame hits the PHY, and the timestamp
2778 * of the beacon is defined as "the time that the data
2779 * symbol containing the first bit of the timestamp is
2780 * transmitted to the PHY plus the transmitting STA’s
2781 * delays through its local PHY from the MAC-PHY
2782 * interface to its interface with the WM"
2783 * (802.11 11.1.2) - equals the time this bit arrives at
2784 * the receiver - we have to take into account the
2785 * offset between the two.
2786 * e.g: at 1 MBit that means mactime is 192 usec earlier
2787 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2788 */
2789 int rate = local->hw.wiphy->bands[rx_status->band]->
2790 bitrates[rx_status->rate_idx].bitrate;
2791 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2792 } else if (local && local->ops && local->ops->get_tsf)
2793 /* second best option: get current TSF */
2794 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2795 else
2796 /* can't merge without knowing the TSF */
2797 rx_timestamp = -1LLU;
2798 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2799 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2800 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2801 print_mac(mac, mgmt->sa),
2802 print_mac(mac2, mgmt->bssid),
2803 (unsigned long long)rx_timestamp,
2804 (unsigned long long)beacon_timestamp,
2805 (unsigned long long)(rx_timestamp - beacon_timestamp),
2806 jiffies);
2807 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2808 if (beacon_timestamp > rx_timestamp) {
2809 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2810 if (net_ratelimit())
2811 #endif
2812 printk(KERN_DEBUG "%s: beacon TSF higher than "
2813 "local TSF - IBSS merge with BSSID %s\n",
2814 dev->name, print_mac(mac, mgmt->bssid));
2815 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2816 ieee80211_ibss_add_sta(dev, NULL,
2817 mgmt->bssid, mgmt->sa);
2818 }
2819 }
2820
2821 ieee80211_rx_bss_put(dev, bss);
2822 }
2823
2824
2825 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2826 struct ieee80211_mgmt *mgmt,
2827 size_t len,
2828 struct ieee80211_rx_status *rx_status)
2829 {
2830 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2831 }
2832
2833
2834 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2835 struct ieee80211_mgmt *mgmt,
2836 size_t len,
2837 struct ieee80211_rx_status *rx_status)
2838 {
2839 struct ieee80211_sub_if_data *sdata;
2840 struct ieee80211_if_sta *ifsta;
2841 size_t baselen;
2842 struct ieee802_11_elems elems;
2843 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2844 struct ieee80211_conf *conf = &local->hw.conf;
2845 u32 changed = 0;
2846
2847 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2848
2849 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2850 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2851 return;
2852 ifsta = &sdata->u.sta;
2853
2854 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2855 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2856 return;
2857
2858 /* Process beacon from the current BSS */
2859 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2860 if (baselen > len)
2861 return;
2862
2863 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2864
2865 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2866 elems.wmm_param_len);
2867
2868 /* Do not send changes to driver if we are scanning. This removes
2869 * requirement that driver's bss_info_changed function needs to be
2870 * atomic. */
2871 if (local->sta_sw_scanning || local->sta_hw_scanning)
2872 return;
2873
2874 if (elems.erp_info && elems.erp_info_len >= 1)
2875 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2876 else {
2877 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2878 changed |= ieee80211_handle_protect_preamb(sdata, false,
2879 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2880 }
2881
2882 if (elems.ht_cap_elem && elems.ht_info_elem &&
2883 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2884 struct ieee80211_ht_bss_info bss_info;
2885
2886 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2887 (struct ieee80211_ht_addt_info *)
2888 elems.ht_info_elem, &bss_info);
2889 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2890 &bss_info);
2891 }
2892
2893 ieee80211_bss_info_change_notify(sdata, changed);
2894 }
2895
2896
2897 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2898 struct ieee80211_if_sta *ifsta,
2899 struct ieee80211_mgmt *mgmt,
2900 size_t len,
2901 struct ieee80211_rx_status *rx_status)
2902 {
2903 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2904 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2905 int tx_last_beacon;
2906 struct sk_buff *skb;
2907 struct ieee80211_mgmt *resp;
2908 u8 *pos, *end;
2909 DECLARE_MAC_BUF(mac);
2910 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2911 DECLARE_MAC_BUF(mac2);
2912 DECLARE_MAC_BUF(mac3);
2913 #endif
2914
2915 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2916 ifsta->state != IEEE80211_IBSS_JOINED ||
2917 len < 24 + 2 || !ifsta->probe_resp)
2918 return;
2919
2920 if (local->ops->tx_last_beacon)
2921 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2922 else
2923 tx_last_beacon = 1;
2924
2925 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2926 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2927 "%s (tx_last_beacon=%d)\n",
2928 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2929 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2930 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2931
2932 if (!tx_last_beacon)
2933 return;
2934
2935 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2936 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2937 return;
2938
2939 end = ((u8 *) mgmt) + len;
2940 pos = mgmt->u.probe_req.variable;
2941 if (pos[0] != WLAN_EID_SSID ||
2942 pos + 2 + pos[1] > end) {
2943 if (net_ratelimit()) {
2944 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2945 "from %s\n",
2946 dev->name, print_mac(mac, mgmt->sa));
2947 }
2948 return;
2949 }
2950 if (pos[1] != 0 &&
2951 (pos[1] != ifsta->ssid_len ||
2952 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2953 /* Ignore ProbeReq for foreign SSID */
2954 return;
2955 }
2956
2957 /* Reply with ProbeResp */
2958 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2959 if (!skb)
2960 return;
2961
2962 resp = (struct ieee80211_mgmt *) skb->data;
2963 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2964 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2965 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2966 dev->name, print_mac(mac, resp->da));
2967 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2968 ieee80211_sta_tx(dev, skb, 0);
2969 }
2970
2971 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2972 struct ieee80211_if_sta *ifsta,
2973 struct ieee80211_mgmt *mgmt,
2974 size_t len,
2975 struct ieee80211_rx_status *rx_status)
2976 {
2977 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2978
2979 if (len < IEEE80211_MIN_ACTION_SIZE)
2980 return;
2981
2982 switch (mgmt->u.action.category) {
2983 case WLAN_CATEGORY_BACK:
2984 switch (mgmt->u.action.u.addba_req.action_code) {
2985 case WLAN_ACTION_ADDBA_REQ:
2986 if (len < (IEEE80211_MIN_ACTION_SIZE +
2987 sizeof(mgmt->u.action.u.addba_req)))
2988 break;
2989 ieee80211_sta_process_addba_request(dev, mgmt, len);
2990 break;
2991 case WLAN_ACTION_ADDBA_RESP:
2992 if (len < (IEEE80211_MIN_ACTION_SIZE +
2993 sizeof(mgmt->u.action.u.addba_resp)))
2994 break;
2995 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2996 break;
2997 case WLAN_ACTION_DELBA:
2998 if (len < (IEEE80211_MIN_ACTION_SIZE +
2999 sizeof(mgmt->u.action.u.delba)))
3000 break;
3001 ieee80211_sta_process_delba(dev, mgmt, len);
3002 break;
3003 default:
3004 if (net_ratelimit())
3005 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3006 dev->name);
3007 break;
3008 }
3009 break;
3010 case PLINK_CATEGORY:
3011 if (ieee80211_vif_is_mesh(&sdata->vif))
3012 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3013 break;
3014 case MESH_PATH_SEL_CATEGORY:
3015 if (ieee80211_vif_is_mesh(&sdata->vif))
3016 mesh_rx_path_sel_frame(dev, mgmt, len);
3017 break;
3018 default:
3019 if (net_ratelimit())
3020 printk(KERN_DEBUG "%s: Rx unknown action frame - "
3021 "category=%d\n", dev->name, mgmt->u.action.category);
3022 break;
3023 }
3024 }
3025
3026 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3027 struct ieee80211_rx_status *rx_status)
3028 {
3029 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3030 struct ieee80211_sub_if_data *sdata;
3031 struct ieee80211_if_sta *ifsta;
3032 struct ieee80211_mgmt *mgmt;
3033 u16 fc;
3034
3035 if (skb->len < 24)
3036 goto fail;
3037
3038 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3039 ifsta = &sdata->u.sta;
3040
3041 mgmt = (struct ieee80211_mgmt *) skb->data;
3042 fc = le16_to_cpu(mgmt->frame_control);
3043
3044 switch (fc & IEEE80211_FCTL_STYPE) {
3045 case IEEE80211_STYPE_PROBE_REQ:
3046 case IEEE80211_STYPE_PROBE_RESP:
3047 case IEEE80211_STYPE_BEACON:
3048 case IEEE80211_STYPE_ACTION:
3049 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3050 case IEEE80211_STYPE_AUTH:
3051 case IEEE80211_STYPE_ASSOC_RESP:
3052 case IEEE80211_STYPE_REASSOC_RESP:
3053 case IEEE80211_STYPE_DEAUTH:
3054 case IEEE80211_STYPE_DISASSOC:
3055 skb_queue_tail(&ifsta->skb_queue, skb);
3056 queue_work(local->hw.workqueue, &ifsta->work);
3057 return;
3058 default:
3059 printk(KERN_DEBUG "%s: received unknown management frame - "
3060 "stype=%d\n", dev->name,
3061 (fc & IEEE80211_FCTL_STYPE) >> 4);
3062 break;
3063 }
3064
3065 fail:
3066 kfree_skb(skb);
3067 }
3068
3069
3070 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3071 struct sk_buff *skb)
3072 {
3073 struct ieee80211_rx_status *rx_status;
3074 struct ieee80211_sub_if_data *sdata;
3075 struct ieee80211_if_sta *ifsta;
3076 struct ieee80211_mgmt *mgmt;
3077 u16 fc;
3078
3079 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3080 ifsta = &sdata->u.sta;
3081
3082 rx_status = (struct ieee80211_rx_status *) skb->cb;
3083 mgmt = (struct ieee80211_mgmt *) skb->data;
3084 fc = le16_to_cpu(mgmt->frame_control);
3085
3086 switch (fc & IEEE80211_FCTL_STYPE) {
3087 case IEEE80211_STYPE_PROBE_REQ:
3088 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3089 rx_status);
3090 break;
3091 case IEEE80211_STYPE_PROBE_RESP:
3092 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3093 break;
3094 case IEEE80211_STYPE_BEACON:
3095 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3096 break;
3097 case IEEE80211_STYPE_AUTH:
3098 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3099 break;
3100 case IEEE80211_STYPE_ASSOC_RESP:
3101 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3102 break;
3103 case IEEE80211_STYPE_REASSOC_RESP:
3104 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3105 break;
3106 case IEEE80211_STYPE_DEAUTH:
3107 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3108 break;
3109 case IEEE80211_STYPE_DISASSOC:
3110 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3111 break;
3112 case IEEE80211_STYPE_ACTION:
3113 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3114 break;
3115 }
3116
3117 kfree_skb(skb);
3118 }
3119
3120
3121 ieee80211_rx_result
3122 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3123 struct ieee80211_rx_status *rx_status)
3124 {
3125 struct ieee80211_mgmt *mgmt;
3126 u16 fc;
3127
3128 if (skb->len < 2)
3129 return RX_DROP_UNUSABLE;
3130
3131 mgmt = (struct ieee80211_mgmt *) skb->data;
3132 fc = le16_to_cpu(mgmt->frame_control);
3133
3134 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3135 return RX_CONTINUE;
3136
3137 if (skb->len < 24)
3138 return RX_DROP_MONITOR;
3139
3140 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3141 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3142 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3143 skb->len, rx_status);
3144 dev_kfree_skb(skb);
3145 return RX_QUEUED;
3146 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3147 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3148 rx_status);
3149 dev_kfree_skb(skb);
3150 return RX_QUEUED;
3151 }
3152 }
3153 return RX_CONTINUE;
3154 }
3155
3156
3157 static int ieee80211_sta_active_ibss(struct net_device *dev)
3158 {
3159 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3160 int active = 0;
3161 struct sta_info *sta;
3162 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3163
3164 rcu_read_lock();
3165
3166 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3167 if (sta->sdata == sdata &&
3168 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3169 jiffies)) {
3170 active++;
3171 break;
3172 }
3173 }
3174
3175 rcu_read_unlock();
3176
3177 return active;
3178 }
3179
3180
3181 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3182 {
3183 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3184 struct sta_info *sta, *tmp;
3185 LIST_HEAD(tmp_list);
3186 DECLARE_MAC_BUF(mac);
3187 unsigned long flags;
3188
3189 spin_lock_irqsave(&local->sta_lock, flags);
3190 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3191 if (time_after(jiffies, sta->last_rx + exp_time)) {
3192 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3193 dev->name, print_mac(mac, sta->addr));
3194 __sta_info_unlink(&sta);
3195 if (sta)
3196 list_add(&sta->list, &tmp_list);
3197 }
3198 spin_unlock_irqrestore(&local->sta_lock, flags);
3199
3200 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3201 sta_info_destroy(sta);
3202 }
3203
3204
3205 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3206 struct ieee80211_if_sta *ifsta)
3207 {
3208 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3209
3210 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3211 if (ieee80211_sta_active_ibss(dev))
3212 return;
3213
3214 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3215 "IBSS networks with same SSID (merge)\n", dev->name);
3216 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3217 }
3218
3219
3220 #ifdef CONFIG_MAC80211_MESH
3221 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3222 struct ieee80211_if_sta *ifsta)
3223 {
3224 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3225 bool free_plinks;
3226
3227 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3228 mesh_path_expire(dev);
3229
3230 free_plinks = mesh_plink_availables(sdata);
3231 if (free_plinks != sdata->u.sta.accepting_plinks)
3232 ieee80211_if_config_beacon(dev);
3233
3234 mod_timer(&ifsta->timer, jiffies +
3235 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3236 }
3237
3238
3239 void ieee80211_start_mesh(struct net_device *dev)
3240 {
3241 struct ieee80211_if_sta *ifsta;
3242 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3243 ifsta = &sdata->u.sta;
3244 ifsta->state = IEEE80211_MESH_UP;
3245 ieee80211_sta_timer((unsigned long)sdata);
3246 }
3247 #endif
3248
3249
3250 void ieee80211_sta_timer(unsigned long data)
3251 {
3252 struct ieee80211_sub_if_data *sdata =
3253 (struct ieee80211_sub_if_data *) data;
3254 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3255 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3256
3257 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3258 queue_work(local->hw.workqueue, &ifsta->work);
3259 }
3260
3261 void ieee80211_sta_work(struct work_struct *work)
3262 {
3263 struct ieee80211_sub_if_data *sdata =
3264 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3265 struct net_device *dev = sdata->dev;
3266 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3267 struct ieee80211_if_sta *ifsta;
3268 struct sk_buff *skb;
3269
3270 if (!netif_running(dev))
3271 return;
3272
3273 if (local->sta_sw_scanning || local->sta_hw_scanning)
3274 return;
3275
3276 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3277 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3278 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3279 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3280 "(type=%d)\n", dev->name, sdata->vif.type);
3281 return;
3282 }
3283 ifsta = &sdata->u.sta;
3284
3285 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3286 ieee80211_sta_rx_queued_mgmt(dev, skb);
3287
3288 #ifdef CONFIG_MAC80211_MESH
3289 if (ifsta->preq_queue_len &&
3290 time_after(jiffies,
3291 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3292 mesh_path_start_discovery(dev);
3293 #endif
3294
3295 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3296 ifsta->state != IEEE80211_ASSOCIATE &&
3297 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3298 if (ifsta->scan_ssid_len)
3299 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3300 else
3301 ieee80211_sta_start_scan(dev, NULL, 0);
3302 return;
3303 }
3304
3305 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3306 if (ieee80211_sta_config_auth(dev, ifsta))
3307 return;
3308 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3309 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3310 return;
3311
3312 switch (ifsta->state) {
3313 case IEEE80211_DISABLED:
3314 break;
3315 case IEEE80211_AUTHENTICATE:
3316 ieee80211_authenticate(dev, ifsta);
3317 break;
3318 case IEEE80211_ASSOCIATE:
3319 ieee80211_associate(dev, ifsta);
3320 break;
3321 case IEEE80211_ASSOCIATED:
3322 ieee80211_associated(dev, ifsta);
3323 break;
3324 case IEEE80211_IBSS_SEARCH:
3325 ieee80211_sta_find_ibss(dev, ifsta);
3326 break;
3327 case IEEE80211_IBSS_JOINED:
3328 ieee80211_sta_merge_ibss(dev, ifsta);
3329 break;
3330 #ifdef CONFIG_MAC80211_MESH
3331 case IEEE80211_MESH_UP:
3332 ieee80211_mesh_housekeeping(dev, ifsta);
3333 break;
3334 #endif
3335 default:
3336 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3337 ifsta->state);
3338 break;
3339 }
3340
3341 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3342 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3343 "mixed-cell disabled - disassociate\n", dev->name);
3344
3345 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3346 ieee80211_set_disassoc(dev, ifsta, 0);
3347 }
3348 }
3349
3350
3351 static void ieee80211_sta_reset_auth(struct net_device *dev,
3352 struct ieee80211_if_sta *ifsta)
3353 {
3354 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3355
3356 if (local->ops->reset_tsf) {
3357 /* Reset own TSF to allow time synchronization work. */
3358 local->ops->reset_tsf(local_to_hw(local));
3359 }
3360
3361 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3362
3363
3364 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3365 ifsta->auth_alg = WLAN_AUTH_OPEN;
3366 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3367 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3368 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3369 ifsta->auth_alg = WLAN_AUTH_LEAP;
3370 else
3371 ifsta->auth_alg = WLAN_AUTH_OPEN;
3372 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3373 ifsta->auth_alg);
3374 ifsta->auth_transaction = -1;
3375 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3376 ifsta->auth_tries = ifsta->assoc_tries = 0;
3377 netif_carrier_off(dev);
3378 }
3379
3380
3381 void ieee80211_sta_req_auth(struct net_device *dev,
3382 struct ieee80211_if_sta *ifsta)
3383 {
3384 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3385 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3386
3387 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3388 return;
3389
3390 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3391 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3392 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3393 IEEE80211_STA_AUTO_SSID_SEL))) {
3394 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3395 queue_work(local->hw.workqueue, &ifsta->work);
3396 }
3397 }
3398
3399 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3400 const char *ssid, int ssid_len)
3401 {
3402 int tmp, hidden_ssid;
3403
3404 if (ssid_len == ifsta->ssid_len &&
3405 !memcmp(ifsta->ssid, ssid, ssid_len))
3406 return 1;
3407
3408 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3409 return 0;
3410
3411 hidden_ssid = 1;
3412 tmp = ssid_len;
3413 while (tmp--) {
3414 if (ssid[tmp] != '\0') {
3415 hidden_ssid = 0;
3416 break;
3417 }
3418 }
3419
3420 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3421 return 1;
3422
3423 if (ssid_len == 1 && ssid[0] == ' ')
3424 return 1;
3425
3426 return 0;
3427 }
3428
3429 static int ieee80211_sta_config_auth(struct net_device *dev,
3430 struct ieee80211_if_sta *ifsta)
3431 {
3432 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3433 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3434 struct ieee80211_sta_bss *bss, *selected = NULL;
3435 int top_rssi = 0, freq;
3436
3437 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3438 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3439 ifsta->state = IEEE80211_AUTHENTICATE;
3440 ieee80211_sta_reset_auth(dev, ifsta);
3441 return 0;
3442 }
3443
3444 spin_lock_bh(&local->sta_bss_lock);
3445 freq = local->oper_channel->center_freq;
3446 list_for_each_entry(bss, &local->sta_bss_list, list) {
3447 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3448 continue;
3449
3450 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3451 !!sdata->default_key)
3452 continue;
3453
3454 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3455 bss->freq != freq)
3456 continue;
3457
3458 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3459 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3460 continue;
3461
3462 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3463 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3464 continue;
3465
3466 if (!selected || top_rssi < bss->signal) {
3467 selected = bss;
3468 top_rssi = bss->signal;
3469 }
3470 }
3471 if (selected)
3472 atomic_inc(&selected->users);
3473 spin_unlock_bh(&local->sta_bss_lock);
3474
3475 if (selected) {
3476 ieee80211_set_freq(local, selected->freq);
3477 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3478 ieee80211_sta_set_ssid(dev, selected->ssid,
3479 selected->ssid_len);
3480 ieee80211_sta_set_bssid(dev, selected->bssid);
3481 ieee80211_sta_def_wmm_params(dev, selected, 0);
3482 ieee80211_rx_bss_put(dev, selected);
3483 ifsta->state = IEEE80211_AUTHENTICATE;
3484 ieee80211_sta_reset_auth(dev, ifsta);
3485 return 0;
3486 } else {
3487 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3488 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3489 ieee80211_sta_start_scan(dev, NULL, 0);
3490 else
3491 ieee80211_sta_start_scan(dev, ifsta->ssid,
3492 ifsta->ssid_len);
3493 ifsta->state = IEEE80211_AUTHENTICATE;
3494 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3495 } else
3496 ifsta->state = IEEE80211_DISABLED;
3497 }
3498 return -1;
3499 }
3500
3501
3502 static int ieee80211_sta_create_ibss(struct net_device *dev,
3503 struct ieee80211_if_sta *ifsta)
3504 {
3505 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3506 struct ieee80211_sta_bss *bss;
3507 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3508 struct ieee80211_supported_band *sband;
3509 u8 bssid[ETH_ALEN], *pos;
3510 int i;
3511 DECLARE_MAC_BUF(mac);
3512
3513 #if 0
3514 /* Easier testing, use fixed BSSID. */
3515 memset(bssid, 0xfe, ETH_ALEN);
3516 #else
3517 /* Generate random, not broadcast, locally administered BSSID. Mix in
3518 * own MAC address to make sure that devices that do not have proper
3519 * random number generator get different BSSID. */
3520 get_random_bytes(bssid, ETH_ALEN);
3521 for (i = 0; i < ETH_ALEN; i++)
3522 bssid[i] ^= dev->dev_addr[i];
3523 bssid[0] &= ~0x01;
3524 bssid[0] |= 0x02;
3525 #endif
3526
3527 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3528 dev->name, print_mac(mac, bssid));
3529
3530 bss = ieee80211_rx_bss_add(dev, bssid,
3531 local->hw.conf.channel->center_freq,
3532 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3533 if (!bss)
3534 return -ENOMEM;
3535
3536 bss->band = local->hw.conf.channel->band;
3537 sband = local->hw.wiphy->bands[bss->band];
3538
3539 if (local->hw.conf.beacon_int == 0)
3540 local->hw.conf.beacon_int = 10000;
3541 bss->beacon_int = local->hw.conf.beacon_int;
3542 bss->last_update = jiffies;
3543 bss->capability = WLAN_CAPABILITY_IBSS;
3544
3545 if (sdata->default_key)
3546 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3547 else
3548 sdata->drop_unencrypted = 0;
3549
3550 bss->supp_rates_len = sband->n_bitrates;
3551 pos = bss->supp_rates;
3552 for (i = 0; i < sband->n_bitrates; i++) {
3553 int rate = sband->bitrates[i].bitrate;
3554 *pos++ = (u8) (rate / 5);
3555 }
3556
3557 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3558 }
3559
3560
3561 static int ieee80211_sta_find_ibss(struct net_device *dev,
3562 struct ieee80211_if_sta *ifsta)
3563 {
3564 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3565 struct ieee80211_sta_bss *bss;
3566 int found = 0;
3567 u8 bssid[ETH_ALEN];
3568 int active_ibss;
3569 DECLARE_MAC_BUF(mac);
3570 DECLARE_MAC_BUF(mac2);
3571
3572 if (ifsta->ssid_len == 0)
3573 return -EINVAL;
3574
3575 active_ibss = ieee80211_sta_active_ibss(dev);
3576 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3577 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3578 dev->name, active_ibss);
3579 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3580 spin_lock_bh(&local->sta_bss_lock);
3581 list_for_each_entry(bss, &local->sta_bss_list, list) {
3582 if (ifsta->ssid_len != bss->ssid_len ||
3583 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3584 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3585 continue;
3586 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3587 printk(KERN_DEBUG " bssid=%s found\n",
3588 print_mac(mac, bss->bssid));
3589 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3590 memcpy(bssid, bss->bssid, ETH_ALEN);
3591 found = 1;
3592 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3593 break;
3594 }
3595 spin_unlock_bh(&local->sta_bss_lock);
3596
3597 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3598 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3599 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3600 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3601 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3602 (bss = ieee80211_rx_bss_get(dev, bssid,
3603 local->hw.conf.channel->center_freq,
3604 ifsta->ssid, ifsta->ssid_len))) {
3605 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3606 " based on configured SSID\n",
3607 dev->name, print_mac(mac, bssid));
3608 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3609 }
3610 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3611 printk(KERN_DEBUG " did not try to join ibss\n");
3612 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3613
3614 /* Selected IBSS not found in current scan results - try to scan */
3615 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3616 !ieee80211_sta_active_ibss(dev)) {
3617 mod_timer(&ifsta->timer, jiffies +
3618 IEEE80211_IBSS_MERGE_INTERVAL);
3619 } else if (time_after(jiffies, local->last_scan_completed +
3620 IEEE80211_SCAN_INTERVAL)) {
3621 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3622 "join\n", dev->name);
3623 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3624 ifsta->ssid_len);
3625 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3626 int interval = IEEE80211_SCAN_INTERVAL;
3627
3628 if (time_after(jiffies, ifsta->ibss_join_req +
3629 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3630 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3631 (!(local->oper_channel->flags &
3632 IEEE80211_CHAN_NO_IBSS)))
3633 return ieee80211_sta_create_ibss(dev, ifsta);
3634 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3635 printk(KERN_DEBUG "%s: IBSS not allowed on"
3636 " %d MHz\n", dev->name,
3637 local->hw.conf.channel->center_freq);
3638 }
3639
3640 /* No IBSS found - decrease scan interval and continue
3641 * scanning. */
3642 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3643 }
3644
3645 ifsta->state = IEEE80211_IBSS_SEARCH;
3646 mod_timer(&ifsta->timer, jiffies + interval);
3647 return 0;
3648 }
3649
3650 return 0;
3651 }
3652
3653
3654 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3655 {
3656 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3657 struct ieee80211_if_sta *ifsta;
3658
3659 if (len > IEEE80211_MAX_SSID_LEN)
3660 return -EINVAL;
3661
3662 ifsta = &sdata->u.sta;
3663
3664 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3665 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3666 memcpy(ifsta->ssid, ssid, len);
3667 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3668 ifsta->ssid_len = len;
3669
3670 if (len)
3671 ifsta->flags |= IEEE80211_STA_SSID_SET;
3672 else
3673 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3674 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3675 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3676 ifsta->ibss_join_req = jiffies;
3677 ifsta->state = IEEE80211_IBSS_SEARCH;
3678 return ieee80211_sta_find_ibss(dev, ifsta);
3679 }
3680 return 0;
3681 }
3682
3683
3684 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3685 {
3686 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3687 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3688 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3689 *len = ifsta->ssid_len;
3690 return 0;
3691 }
3692
3693
3694 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3695 {
3696 struct ieee80211_sub_if_data *sdata;
3697 struct ieee80211_if_sta *ifsta;
3698 int res;
3699
3700 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3701 ifsta = &sdata->u.sta;
3702
3703 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3704 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3705 res = ieee80211_if_config(dev);
3706 if (res) {
3707 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3708 "the low-level driver\n", dev->name);
3709 return res;
3710 }
3711 }
3712
3713 if (is_valid_ether_addr(bssid))
3714 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3715 else
3716 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3717
3718 return 0;
3719 }
3720
3721
3722 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3723 struct ieee80211_sub_if_data *sdata,
3724 int powersave)
3725 {
3726 struct sk_buff *skb;
3727 struct ieee80211_hdr *nullfunc;
3728 u16 fc;
3729
3730 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3731 if (!skb) {
3732 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3733 "frame\n", sdata->dev->name);
3734 return;
3735 }
3736 skb_reserve(skb, local->hw.extra_tx_headroom);
3737
3738 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3739 memset(nullfunc, 0, 24);
3740 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3741 IEEE80211_FCTL_TODS;
3742 if (powersave)
3743 fc |= IEEE80211_FCTL_PM;
3744 nullfunc->frame_control = cpu_to_le16(fc);
3745 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3746 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3747 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3748
3749 ieee80211_sta_tx(sdata->dev, skb, 0);
3750 }
3751
3752
3753 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3754 {
3755 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3756 ieee80211_vif_is_mesh(&sdata->vif))
3757 ieee80211_sta_timer((unsigned long)sdata);
3758 }
3759
3760 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3761 {
3762 struct ieee80211_local *local = hw_to_local(hw);
3763 struct net_device *dev = local->scan_dev;
3764 struct ieee80211_sub_if_data *sdata;
3765 union iwreq_data wrqu;
3766
3767 local->last_scan_completed = jiffies;
3768 memset(&wrqu, 0, sizeof(wrqu));
3769 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3770
3771 if (local->sta_hw_scanning) {
3772 local->sta_hw_scanning = 0;
3773 if (ieee80211_hw_config(local))
3774 printk(KERN_DEBUG "%s: failed to restore operational "
3775 "channel after scan\n", dev->name);
3776 /* Restart STA timer for HW scan case */
3777 rcu_read_lock();
3778 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3779 ieee80211_restart_sta_timer(sdata);
3780 rcu_read_unlock();
3781
3782 goto done;
3783 }
3784
3785 local->sta_sw_scanning = 0;
3786 if (ieee80211_hw_config(local))
3787 printk(KERN_DEBUG "%s: failed to restore operational "
3788 "channel after scan\n", dev->name);
3789
3790
3791 netif_tx_lock_bh(local->mdev);
3792 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3793 local->ops->configure_filter(local_to_hw(local),
3794 FIF_BCN_PRBRESP_PROMISC,
3795 &local->filter_flags,
3796 local->mdev->mc_count,
3797 local->mdev->mc_list);
3798
3799 netif_tx_unlock_bh(local->mdev);
3800
3801 rcu_read_lock();
3802 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3803
3804 /* No need to wake the master device. */
3805 if (sdata->dev == local->mdev)
3806 continue;
3807
3808 /* Tell AP we're back */
3809 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3810 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3811 ieee80211_send_nullfunc(local, sdata, 0);
3812
3813 ieee80211_restart_sta_timer(sdata);
3814
3815 netif_wake_queue(sdata->dev);
3816 }
3817 rcu_read_unlock();
3818
3819 done:
3820 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3821 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3822 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3823 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3824 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3825 !ieee80211_sta_active_ibss(dev)))
3826 ieee80211_sta_find_ibss(dev, ifsta);
3827 }
3828 }
3829 EXPORT_SYMBOL(ieee80211_scan_completed);
3830
3831 void ieee80211_sta_scan_work(struct work_struct *work)
3832 {
3833 struct ieee80211_local *local =
3834 container_of(work, struct ieee80211_local, scan_work.work);
3835 struct net_device *dev = local->scan_dev;
3836 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3837 struct ieee80211_supported_band *sband;
3838 struct ieee80211_channel *chan;
3839 int skip;
3840 unsigned long next_delay = 0;
3841
3842 if (!local->sta_sw_scanning)
3843 return;
3844
3845 switch (local->scan_state) {
3846 case SCAN_SET_CHANNEL:
3847 /*
3848 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3849 * after we successfully scanned the last channel of the last
3850 * band (and the last band is supported by the hw)
3851 */
3852 if (local->scan_band < IEEE80211_NUM_BANDS)
3853 sband = local->hw.wiphy->bands[local->scan_band];
3854 else
3855 sband = NULL;
3856
3857 /*
3858 * If we are at an unsupported band and have more bands
3859 * left to scan, advance to the next supported one.
3860 */
3861 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3862 local->scan_band++;
3863 sband = local->hw.wiphy->bands[local->scan_band];
3864 local->scan_channel_idx = 0;
3865 }
3866
3867 /* if no more bands/channels left, complete scan */
3868 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3869 ieee80211_scan_completed(local_to_hw(local));
3870 return;
3871 }
3872 skip = 0;
3873 chan = &sband->channels[local->scan_channel_idx];
3874
3875 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3876 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3877 chan->flags & IEEE80211_CHAN_NO_IBSS))
3878 skip = 1;
3879
3880 if (!skip) {
3881 local->scan_channel = chan;
3882 if (ieee80211_hw_config(local)) {
3883 printk(KERN_DEBUG "%s: failed to set freq to "
3884 "%d MHz for scan\n", dev->name,
3885 chan->center_freq);
3886 skip = 1;
3887 }
3888 }
3889
3890 /* advance state machine to next channel/band */
3891 local->scan_channel_idx++;
3892 if (local->scan_channel_idx >= sband->n_channels) {
3893 /*
3894 * scan_band may end up == IEEE80211_NUM_BANDS, but
3895 * we'll catch that case above and complete the scan
3896 * if that is the case.
3897 */
3898 local->scan_band++;
3899 local->scan_channel_idx = 0;
3900 }
3901
3902 if (skip)
3903 break;
3904
3905 next_delay = IEEE80211_PROBE_DELAY +
3906 usecs_to_jiffies(local->hw.channel_change_time);
3907 local->scan_state = SCAN_SEND_PROBE;
3908 break;
3909 case SCAN_SEND_PROBE:
3910 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3911 local->scan_state = SCAN_SET_CHANNEL;
3912
3913 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3914 break;
3915 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3916 local->scan_ssid_len);
3917 next_delay = IEEE80211_CHANNEL_TIME;
3918 break;
3919 }
3920
3921 if (local->sta_sw_scanning)
3922 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3923 next_delay);
3924 }
3925
3926
3927 static int ieee80211_sta_start_scan(struct net_device *dev,
3928 u8 *ssid, size_t ssid_len)
3929 {
3930 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3931 struct ieee80211_sub_if_data *sdata;
3932
3933 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3934 return -EINVAL;
3935
3936 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3937 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3938 * BSSID: MACAddress
3939 * SSID
3940 * ScanType: ACTIVE, PASSIVE
3941 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3942 * a Probe frame during active scanning
3943 * ChannelList
3944 * MinChannelTime (>= ProbeDelay), in TU
3945 * MaxChannelTime: (>= MinChannelTime), in TU
3946 */
3947
3948 /* MLME-SCAN.confirm
3949 * BSSDescriptionSet
3950 * ResultCode: SUCCESS, INVALID_PARAMETERS
3951 */
3952
3953 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3954 if (local->scan_dev == dev)
3955 return 0;
3956 return -EBUSY;
3957 }
3958
3959 if (local->ops->hw_scan) {
3960 int rc = local->ops->hw_scan(local_to_hw(local),
3961 ssid, ssid_len);
3962 if (!rc) {
3963 local->sta_hw_scanning = 1;
3964 local->scan_dev = dev;
3965 }
3966 return rc;
3967 }
3968
3969 local->sta_sw_scanning = 1;
3970
3971 rcu_read_lock();
3972 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3973
3974 /* Don't stop the master interface, otherwise we can't transmit
3975 * probes! */
3976 if (sdata->dev == local->mdev)
3977 continue;
3978
3979 netif_stop_queue(sdata->dev);
3980 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3981 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3982 ieee80211_send_nullfunc(local, sdata, 1);
3983 }
3984 rcu_read_unlock();
3985
3986 if (ssid) {
3987 local->scan_ssid_len = ssid_len;
3988 memcpy(local->scan_ssid, ssid, ssid_len);
3989 } else
3990 local->scan_ssid_len = 0;
3991 local->scan_state = SCAN_SET_CHANNEL;
3992 local->scan_channel_idx = 0;
3993 local->scan_band = IEEE80211_BAND_2GHZ;
3994 local->scan_dev = dev;
3995
3996 netif_tx_lock_bh(local->mdev);
3997 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3998 local->ops->configure_filter(local_to_hw(local),
3999 FIF_BCN_PRBRESP_PROMISC,
4000 &local->filter_flags,
4001 local->mdev->mc_count,
4002 local->mdev->mc_list);
4003 netif_tx_unlock_bh(local->mdev);
4004
4005 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4006 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4007 IEEE80211_CHANNEL_TIME);
4008
4009 return 0;
4010 }
4011
4012
4013 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4014 {
4015 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4016 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4017 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4018
4019 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4020 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4021
4022 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4023 if (local->scan_dev == dev)
4024 return 0;
4025 return -EBUSY;
4026 }
4027
4028 ifsta->scan_ssid_len = ssid_len;
4029 if (ssid_len)
4030 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4031 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4032 queue_work(local->hw.workqueue, &ifsta->work);
4033 return 0;
4034 }
4035
4036 static char *
4037 ieee80211_sta_scan_result(struct net_device *dev,
4038 struct ieee80211_sta_bss *bss,
4039 char *current_ev, char *end_buf)
4040 {
4041 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4042 struct iw_event iwe;
4043
4044 if (time_after(jiffies,
4045 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4046 return current_ev;
4047
4048 memset(&iwe, 0, sizeof(iwe));
4049 iwe.cmd = SIOCGIWAP;
4050 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4051 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4052 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4053 IW_EV_ADDR_LEN);
4054
4055 memset(&iwe, 0, sizeof(iwe));
4056 iwe.cmd = SIOCGIWESSID;
4057 if (bss_mesh_cfg(bss)) {
4058 iwe.u.data.length = bss_mesh_id_len(bss);
4059 iwe.u.data.flags = 1;
4060 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4061 bss_mesh_id(bss));
4062 } else {
4063 iwe.u.data.length = bss->ssid_len;
4064 iwe.u.data.flags = 1;
4065 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4066 bss->ssid);
4067 }
4068
4069 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4070 || bss_mesh_cfg(bss)) {
4071 memset(&iwe, 0, sizeof(iwe));
4072 iwe.cmd = SIOCGIWMODE;
4073 if (bss_mesh_cfg(bss))
4074 iwe.u.mode = IW_MODE_MESH;
4075 else if (bss->capability & WLAN_CAPABILITY_ESS)
4076 iwe.u.mode = IW_MODE_MASTER;
4077 else
4078 iwe.u.mode = IW_MODE_ADHOC;
4079 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4080 IW_EV_UINT_LEN);
4081 }
4082
4083 memset(&iwe, 0, sizeof(iwe));
4084 iwe.cmd = SIOCGIWFREQ;
4085 iwe.u.freq.m = bss->freq;
4086 iwe.u.freq.e = 6;
4087 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4088 IW_EV_FREQ_LEN);
4089
4090 memset(&iwe, 0, sizeof(iwe));
4091 iwe.cmd = SIOCGIWFREQ;
4092 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4093 iwe.u.freq.e = 0;
4094 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4095 IW_EV_FREQ_LEN);
4096
4097 memset(&iwe, 0, sizeof(iwe));
4098 iwe.cmd = IWEVQUAL;
4099 iwe.u.qual.qual = bss->qual;
4100 iwe.u.qual.level = bss->signal;
4101 iwe.u.qual.noise = bss->noise;
4102 iwe.u.qual.updated = local->wstats_flags;
4103 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4104 IW_EV_QUAL_LEN);
4105
4106 memset(&iwe, 0, sizeof(iwe));
4107 iwe.cmd = SIOCGIWENCODE;
4108 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4109 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4110 else
4111 iwe.u.data.flags = IW_ENCODE_DISABLED;
4112 iwe.u.data.length = 0;
4113 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4114
4115 if (bss && bss->wpa_ie) {
4116 memset(&iwe, 0, sizeof(iwe));
4117 iwe.cmd = IWEVGENIE;
4118 iwe.u.data.length = bss->wpa_ie_len;
4119 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4120 bss->wpa_ie);
4121 }
4122
4123 if (bss && bss->rsn_ie) {
4124 memset(&iwe, 0, sizeof(iwe));
4125 iwe.cmd = IWEVGENIE;
4126 iwe.u.data.length = bss->rsn_ie_len;
4127 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4128 bss->rsn_ie);
4129 }
4130
4131 if (bss && bss->supp_rates_len > 0) {
4132 /* display all supported rates in readable format */
4133 char *p = current_ev + IW_EV_LCP_LEN;
4134 int i;
4135
4136 memset(&iwe, 0, sizeof(iwe));
4137 iwe.cmd = SIOCGIWRATE;
4138 /* Those two flags are ignored... */
4139 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4140
4141 for (i = 0; i < bss->supp_rates_len; i++) {
4142 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4143 0x7f) * 500000);
4144 p = iwe_stream_add_value(current_ev, p,
4145 end_buf, &iwe, IW_EV_PARAM_LEN);
4146 }
4147 current_ev = p;
4148 }
4149
4150 if (bss) {
4151 char *buf;
4152 buf = kmalloc(30, GFP_ATOMIC);
4153 if (buf) {
4154 memset(&iwe, 0, sizeof(iwe));
4155 iwe.cmd = IWEVCUSTOM;
4156 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4157 iwe.u.data.length = strlen(buf);
4158 current_ev = iwe_stream_add_point(current_ev, end_buf,
4159 &iwe, buf);
4160 kfree(buf);
4161 }
4162 }
4163
4164 if (bss_mesh_cfg(bss)) {
4165 char *buf;
4166 u8 *cfg = bss_mesh_cfg(bss);
4167 buf = kmalloc(50, GFP_ATOMIC);
4168 if (buf) {
4169 memset(&iwe, 0, sizeof(iwe));
4170 iwe.cmd = IWEVCUSTOM;
4171 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4172 iwe.u.data.length = strlen(buf);
4173 current_ev = iwe_stream_add_point(current_ev, end_buf,
4174 &iwe, buf);
4175 sprintf(buf, "Path Selection Protocol ID: "
4176 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4177 cfg[4]);
4178 iwe.u.data.length = strlen(buf);
4179 current_ev = iwe_stream_add_point(current_ev, end_buf,
4180 &iwe, buf);
4181 sprintf(buf, "Path Selection Metric ID: "
4182 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4183 cfg[8]);
4184 iwe.u.data.length = strlen(buf);
4185 current_ev = iwe_stream_add_point(current_ev, end_buf,
4186 &iwe, buf);
4187 sprintf(buf, "Congestion Control Mode ID: "
4188 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4189 cfg[11], cfg[12]);
4190 iwe.u.data.length = strlen(buf);
4191 current_ev = iwe_stream_add_point(current_ev, end_buf,
4192 &iwe, buf);
4193 sprintf(buf, "Channel Precedence: "
4194 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4195 cfg[15], cfg[16]);
4196 iwe.u.data.length = strlen(buf);
4197 current_ev = iwe_stream_add_point(current_ev, end_buf,
4198 &iwe, buf);
4199 kfree(buf);
4200 }
4201 }
4202
4203 return current_ev;
4204 }
4205
4206
4207 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4208 {
4209 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4210 char *current_ev = buf;
4211 char *end_buf = buf + len;
4212 struct ieee80211_sta_bss *bss;
4213
4214 spin_lock_bh(&local->sta_bss_lock);
4215 list_for_each_entry(bss, &local->sta_bss_list, list) {
4216 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4217 spin_unlock_bh(&local->sta_bss_lock);
4218 return -E2BIG;
4219 }
4220 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4221 end_buf);
4222 }
4223 spin_unlock_bh(&local->sta_bss_lock);
4224 return current_ev - buf;
4225 }
4226
4227
4228 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4229 {
4230 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4231 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4232
4233 kfree(ifsta->extra_ie);
4234 if (len == 0) {
4235 ifsta->extra_ie = NULL;
4236 ifsta->extra_ie_len = 0;
4237 return 0;
4238 }
4239 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4240 if (!ifsta->extra_ie) {
4241 ifsta->extra_ie_len = 0;
4242 return -ENOMEM;
4243 }
4244 memcpy(ifsta->extra_ie, ie, len);
4245 ifsta->extra_ie_len = len;
4246 return 0;
4247 }
4248
4249
4250 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4251 struct sk_buff *skb, u8 *bssid,
4252 u8 *addr)
4253 {
4254 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4255 struct sta_info *sta;
4256 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4257 DECLARE_MAC_BUF(mac);
4258
4259 /* TODO: Could consider removing the least recently used entry and
4260 * allow new one to be added. */
4261 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4262 if (net_ratelimit()) {
4263 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4264 "entry %s\n", dev->name, print_mac(mac, addr));
4265 }
4266 return NULL;
4267 }
4268
4269 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4270 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4271
4272 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4273 if (!sta)
4274 return NULL;
4275
4276 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4277
4278 sta->supp_rates[local->hw.conf.channel->band] =
4279 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4280
4281 rate_control_rate_init(sta, local);
4282
4283 if (sta_info_insert(sta))
4284 return NULL;
4285
4286 return sta;
4287 }
4288
4289
4290 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4291 {
4292 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4293 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4294
4295 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4296 dev->name, reason);
4297
4298 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4299 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4300 return -EINVAL;
4301
4302 ieee80211_send_deauth(dev, ifsta, reason);
4303 ieee80211_set_disassoc(dev, ifsta, 1);
4304 return 0;
4305 }
4306
4307
4308 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4309 {
4310 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4311 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4312
4313 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4314 dev->name, reason);
4315
4316 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4317 return -EINVAL;
4318
4319 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4320 return -1;
4321
4322 ieee80211_send_disassoc(dev, ifsta, reason);
4323 ieee80211_set_disassoc(dev, ifsta, 0);
4324 return 0;
4325 }
4326
4327 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4328 enum ieee80211_notification_types notif_type)
4329 {
4330 struct ieee80211_local *local = hw_to_local(hw);
4331 struct ieee80211_sub_if_data *sdata;
4332
4333 switch (notif_type) {
4334 case IEEE80211_NOTIFY_RE_ASSOC:
4335 rcu_read_lock();
4336 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4337
4338 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4339 ieee80211_sta_req_auth(sdata->dev,
4340 &sdata->u.sta);
4341 }
4342
4343 }
4344 rcu_read_unlock();
4345 break;
4346 }
4347 }
4348 EXPORT_SYMBOL(ieee80211_notify_mac);
SocketAccessConTroL development