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ACPI: thinkpad-acpi: add development version tag
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / mlme.c
blob902cac1bd246ab7f861cb2f1aa8b3c06168dc33a
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 (7 * 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 ieee80211_local *local,
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 case WLAN_EID_CHANNEL_SWITCH:
208 elems->ch_switch_elem = pos;
209 elems->ch_switch_elem_len = elen;
210 break;
211 case WLAN_EID_QUIET:
212 if (!elems->quiet_elem) {
213 elems->quiet_elem = pos;
214 elems->quiet_elem_len = elen;
215 }
216 elems->num_of_quiet_elem++;
217 break;
218 case WLAN_EID_COUNTRY:
219 elems->country_elem = pos;
220 elems->country_elem_len = elen;
221 break;
222 case WLAN_EID_PWR_CONSTRAINT:
223 elems->pwr_constr_elem = pos;
224 elems->pwr_constr_elem_len = elen;
225 break;
226 default:
227 break;
228 }
229
230 left -= elen;
231 pos += elen;
232 }
233 }
234
235
236 static int ecw2cw(int ecw)
237 {
238 return (1 << ecw) - 1;
239 }
240
241
242 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
243 struct ieee80211_sta_bss *bss,
244 int ibss)
245 {
246 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
247 struct ieee80211_local *local = sdata->local;
248 int i, have_higher_than_11mbit = 0;
249
250
251 /* cf. IEEE 802.11 9.2.12 */
252 for (i = 0; i < bss->supp_rates_len; i++)
253 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
254 have_higher_than_11mbit = 1;
255
256 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
257 have_higher_than_11mbit)
258 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
259 else
260 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
261
262
263 if (local->ops->conf_tx) {
264 struct ieee80211_tx_queue_params qparam;
265
266 memset(&qparam, 0, sizeof(qparam));
267
268 qparam.aifs = 2;
269
270 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
271 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
272 qparam.cw_min = 31;
273 else
274 qparam.cw_min = 15;
275
276 qparam.cw_max = 1023;
277 qparam.txop = 0;
278
279 for (i = 0; i < local_to_hw(local)->queues; i++)
280 local->ops->conf_tx(local_to_hw(local), i, &qparam);
281 }
282 }
283
284 static void ieee80211_sta_wmm_params(struct net_device *dev,
285 struct ieee80211_if_sta *ifsta,
286 u8 *wmm_param, size_t wmm_param_len)
287 {
288 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
289 struct ieee80211_tx_queue_params params;
290 size_t left;
291 int count;
292 u8 *pos;
293
294 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
295 return;
296
297 if (!wmm_param)
298 return;
299
300 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
301 return;
302 count = wmm_param[6] & 0x0f;
303 if (count == ifsta->wmm_last_param_set)
304 return;
305 ifsta->wmm_last_param_set = count;
306
307 pos = wmm_param + 8;
308 left = wmm_param_len - 8;
309
310 memset(&params, 0, sizeof(params));
311
312 if (!local->ops->conf_tx)
313 return;
314
315 local->wmm_acm = 0;
316 for (; left >= 4; left -= 4, pos += 4) {
317 int aci = (pos[0] >> 5) & 0x03;
318 int acm = (pos[0] >> 4) & 0x01;
319 int queue;
320
321 switch (aci) {
322 case 1:
323 queue = 3;
324 if (acm)
325 local->wmm_acm |= BIT(0) | BIT(3);
326 break;
327 case 2:
328 queue = 1;
329 if (acm)
330 local->wmm_acm |= BIT(4) | BIT(5);
331 break;
332 case 3:
333 queue = 0;
334 if (acm)
335 local->wmm_acm |= BIT(6) | BIT(7);
336 break;
337 case 0:
338 default:
339 queue = 2;
340 if (acm)
341 local->wmm_acm |= BIT(1) | BIT(2);
342 break;
343 }
344
345 params.aifs = pos[0] & 0x0f;
346 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
347 params.cw_min = ecw2cw(pos[1] & 0x0f);
348 params.txop = get_unaligned_le16(pos + 2);
349 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
350 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
351 "cWmin=%d cWmax=%d txop=%d\n",
352 dev->name, queue, aci, acm, params.aifs, params.cw_min,
353 params.cw_max, params.txop);
354 #endif
355 /* TODO: handle ACM (block TX, fallback to next lowest allowed
356 * AC for now) */
357 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
358 printk(KERN_DEBUG "%s: failed to set TX queue "
359 "parameters for queue %d\n", dev->name, queue);
360 }
361 }
362 }
363
364 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
365 bool use_protection,
366 bool use_short_preamble)
367 {
368 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
369 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
370 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
371 DECLARE_MAC_BUF(mac);
372 #endif
373 u32 changed = 0;
374
375 if (use_protection != bss_conf->use_cts_prot) {
376 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
377 if (net_ratelimit()) {
378 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
379 "%s)\n",
380 sdata->dev->name,
381 use_protection ? "enabled" : "disabled",
382 print_mac(mac, ifsta->bssid));
383 }
384 #endif
385 bss_conf->use_cts_prot = use_protection;
386 changed |= BSS_CHANGED_ERP_CTS_PROT;
387 }
388
389 if (use_short_preamble != bss_conf->use_short_preamble) {
390 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
391 if (net_ratelimit()) {
392 printk(KERN_DEBUG "%s: switched to %s barker preamble"
393 " (BSSID=%s)\n",
394 sdata->dev->name,
395 use_short_preamble ? "short" : "long",
396 print_mac(mac, ifsta->bssid));
397 }
398 #endif
399 bss_conf->use_short_preamble = use_short_preamble;
400 changed |= BSS_CHANGED_ERP_PREAMBLE;
401 }
402
403 return changed;
404 }
405
406 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
407 u8 erp_value)
408 {
409 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
410 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
411
412 return ieee80211_handle_protect_preamb(sdata,
413 use_protection, use_short_preamble);
414 }
415
416 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
417 struct ieee80211_sta_bss *bss)
418 {
419 u32 changed = 0;
420
421 if (bss->has_erp_value)
422 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
423 else {
424 u16 capab = bss->capability;
425 changed |= ieee80211_handle_protect_preamb(sdata, false,
426 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
427 }
428
429 return changed;
430 }
431
432 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
433 struct ieee80211_ht_info *ht_info)
434 {
435
436 if (ht_info == NULL)
437 return -EINVAL;
438
439 memset(ht_info, 0, sizeof(*ht_info));
440
441 if (ht_cap_ie) {
442 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
443
444 ht_info->ht_supported = 1;
445 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
446 ht_info->ampdu_factor =
447 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
448 ht_info->ampdu_density =
449 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
450 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
451 } else
452 ht_info->ht_supported = 0;
453
454 return 0;
455 }
456
457 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
458 struct ieee80211_ht_addt_info *ht_add_info_ie,
459 struct ieee80211_ht_bss_info *bss_info)
460 {
461 if (bss_info == NULL)
462 return -EINVAL;
463
464 memset(bss_info, 0, sizeof(*bss_info));
465
466 if (ht_add_info_ie) {
467 u16 op_mode;
468 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
469
470 bss_info->primary_channel = ht_add_info_ie->control_chan;
471 bss_info->bss_cap = ht_add_info_ie->ht_param;
472 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
473 }
474
475 return 0;
476 }
477
478 static void ieee80211_sta_send_associnfo(struct net_device *dev,
479 struct ieee80211_if_sta *ifsta)
480 {
481 char *buf;
482 size_t len;
483 int i;
484 union iwreq_data wrqu;
485
486 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
487 return;
488
489 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
490 ifsta->assocresp_ies_len), GFP_KERNEL);
491 if (!buf)
492 return;
493
494 len = sprintf(buf, "ASSOCINFO(");
495 if (ifsta->assocreq_ies) {
496 len += sprintf(buf + len, "ReqIEs=");
497 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
498 len += sprintf(buf + len, "%02x",
499 ifsta->assocreq_ies[i]);
500 }
501 }
502 if (ifsta->assocresp_ies) {
503 if (ifsta->assocreq_ies)
504 len += sprintf(buf + len, " ");
505 len += sprintf(buf + len, "RespIEs=");
506 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
507 len += sprintf(buf + len, "%02x",
508 ifsta->assocresp_ies[i]);
509 }
510 }
511 len += sprintf(buf + len, ")");
512
513 if (len > IW_CUSTOM_MAX) {
514 len = sprintf(buf, "ASSOCRESPIE=");
515 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
516 len += sprintf(buf + len, "%02x",
517 ifsta->assocresp_ies[i]);
518 }
519 }
520
521 memset(&wrqu, 0, sizeof(wrqu));
522 wrqu.data.length = len;
523 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
524
525 kfree(buf);
526 }
527
528
529 static void ieee80211_set_associated(struct net_device *dev,
530 struct ieee80211_if_sta *ifsta,
531 bool assoc)
532 {
533 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
534 struct ieee80211_local *local = sdata->local;
535 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
536 union iwreq_data wrqu;
537 u32 changed = BSS_CHANGED_ASSOC;
538
539 if (assoc) {
540 struct ieee80211_sta_bss *bss;
541
542 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
543
544 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
545 return;
546
547 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
548 conf->channel->center_freq,
549 ifsta->ssid, ifsta->ssid_len);
550 if (bss) {
551 /* set timing information */
552 sdata->bss_conf.beacon_int = bss->beacon_int;
553 sdata->bss_conf.timestamp = bss->timestamp;
554 sdata->bss_conf.dtim_period = bss->dtim_period;
555
556 changed |= ieee80211_handle_bss_capability(sdata, bss);
557
558 ieee80211_rx_bss_put(local, bss);
559 }
560
561 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
562 changed |= BSS_CHANGED_HT;
563 sdata->bss_conf.assoc_ht = 1;
564 sdata->bss_conf.ht_conf = &conf->ht_conf;
565 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
566 }
567
568 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
569 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
570 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
571 ieee80211_sta_send_associnfo(dev, ifsta);
572 } else {
573 netif_carrier_off(dev);
574 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
575 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
576 changed |= ieee80211_reset_erp_info(dev);
577
578 sdata->bss_conf.assoc_ht = 0;
579 sdata->bss_conf.ht_conf = NULL;
580 sdata->bss_conf.ht_bss_conf = NULL;
581
582 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
583 }
584 ifsta->last_probe = jiffies;
585 ieee80211_led_assoc(local, assoc);
586
587 sdata->bss_conf.assoc = assoc;
588 ieee80211_bss_info_change_notify(sdata, changed);
589
590 if (assoc)
591 netif_carrier_on(dev);
592
593 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
594 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
595 }
596
597 static void ieee80211_set_disassoc(struct net_device *dev,
598 struct ieee80211_if_sta *ifsta, int deauth)
599 {
600 if (deauth)
601 ifsta->auth_tries = 0;
602 ifsta->assoc_tries = 0;
603 ieee80211_set_associated(dev, ifsta, 0);
604 }
605
606 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
607 int encrypt)
608 {
609 struct ieee80211_sub_if_data *sdata;
610
611 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
612 skb->dev = sdata->local->mdev;
613 skb_set_mac_header(skb, 0);
614 skb_set_network_header(skb, 0);
615 skb_set_transport_header(skb, 0);
616
617 skb->iif = sdata->dev->ifindex;
618 skb->do_not_encrypt = !encrypt;
619
620 dev_queue_xmit(skb);
621 }
622
623
624 static void ieee80211_send_auth(struct net_device *dev,
625 struct ieee80211_if_sta *ifsta,
626 int transaction, u8 *extra, size_t extra_len,
627 int encrypt)
628 {
629 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
630 struct sk_buff *skb;
631 struct ieee80211_mgmt *mgmt;
632
633 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
634 sizeof(*mgmt) + 6 + extra_len);
635 if (!skb) {
636 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
637 "frame\n", dev->name);
638 return;
639 }
640 skb_reserve(skb, local->hw.extra_tx_headroom);
641
642 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
643 memset(mgmt, 0, 24 + 6);
644 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
645 IEEE80211_STYPE_AUTH);
646 if (encrypt)
647 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
648 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
649 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
650 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
651 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
652 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
653 ifsta->auth_transaction = transaction + 1;
654 mgmt->u.auth.status_code = cpu_to_le16(0);
655 if (extra)
656 memcpy(skb_put(skb, extra_len), extra, extra_len);
657
658 ieee80211_sta_tx(dev, skb, encrypt);
659 }
660
661
662 static void ieee80211_authenticate(struct net_device *dev,
663 struct ieee80211_if_sta *ifsta)
664 {
665 DECLARE_MAC_BUF(mac);
666
667 ifsta->auth_tries++;
668 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
669 printk(KERN_DEBUG "%s: authentication with AP %s"
670 " timed out\n",
671 dev->name, print_mac(mac, ifsta->bssid));
672 ifsta->state = IEEE80211_DISABLED;
673 return;
674 }
675
676 ifsta->state = IEEE80211_AUTHENTICATE;
677 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
678 dev->name, print_mac(mac, ifsta->bssid));
679
680 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
681
682 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
683 }
684
685 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
686 struct ieee80211_supported_band *sband,
687 u64 *rates)
688 {
689 int i, j, count;
690 *rates = 0;
691 count = 0;
692 for (i = 0; i < bss->supp_rates_len; i++) {
693 int rate = (bss->supp_rates[i] & 0x7F) * 5;
694
695 for (j = 0; j < sband->n_bitrates; j++)
696 if (sband->bitrates[j].bitrate == rate) {
697 *rates |= BIT(j);
698 count++;
699 break;
700 }
701 }
702
703 return count;
704 }
705
706 static void ieee80211_send_assoc(struct net_device *dev,
707 struct ieee80211_if_sta *ifsta)
708 {
709 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
710 struct sk_buff *skb;
711 struct ieee80211_mgmt *mgmt;
712 u8 *pos, *ies;
713 int i, len, count, rates_len, supp_rates_len;
714 u16 capab;
715 struct ieee80211_sta_bss *bss;
716 int wmm = 0;
717 struct ieee80211_supported_band *sband;
718 u64 rates = 0;
719
720 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
721 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
722 ifsta->ssid_len);
723 if (!skb) {
724 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
725 "frame\n", dev->name);
726 return;
727 }
728 skb_reserve(skb, local->hw.extra_tx_headroom);
729
730 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
731
732 capab = ifsta->capab;
733
734 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
735 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
736 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
737 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
738 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
739 }
740
741 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
742 local->hw.conf.channel->center_freq,
743 ifsta->ssid, ifsta->ssid_len);
744 if (bss) {
745 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
746 capab |= WLAN_CAPABILITY_PRIVACY;
747 if (bss->wmm_ie)
748 wmm = 1;
749
750 /* get all rates supported by the device and the AP as
751 * some APs don't like getting a superset of their rates
752 * in the association request (e.g. D-Link DAP 1353 in
753 * b-only mode) */
754 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
755
756 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
757 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
758 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
759
760 ieee80211_rx_bss_put(local, bss);
761 } else {
762 rates = ~0;
763 rates_len = sband->n_bitrates;
764 }
765
766 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
767 memset(mgmt, 0, 24);
768 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
769 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
770 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
771
772 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
773 skb_put(skb, 10);
774 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
775 IEEE80211_STYPE_REASSOC_REQ);
776 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
777 mgmt->u.reassoc_req.listen_interval =
778 cpu_to_le16(local->hw.conf.listen_interval);
779 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
780 ETH_ALEN);
781 } else {
782 skb_put(skb, 4);
783 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
784 IEEE80211_STYPE_ASSOC_REQ);
785 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
786 mgmt->u.reassoc_req.listen_interval =
787 cpu_to_le16(local->hw.conf.listen_interval);
788 }
789
790 /* SSID */
791 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
792 *pos++ = WLAN_EID_SSID;
793 *pos++ = ifsta->ssid_len;
794 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
795
796 /* add all rates which were marked to be used above */
797 supp_rates_len = rates_len;
798 if (supp_rates_len > 8)
799 supp_rates_len = 8;
800
801 len = sband->n_bitrates;
802 pos = skb_put(skb, supp_rates_len + 2);
803 *pos++ = WLAN_EID_SUPP_RATES;
804 *pos++ = supp_rates_len;
805
806 count = 0;
807 for (i = 0; i < sband->n_bitrates; i++) {
808 if (BIT(i) & rates) {
809 int rate = sband->bitrates[i].bitrate;
810 *pos++ = (u8) (rate / 5);
811 if (++count == 8)
812 break;
813 }
814 }
815
816 if (rates_len > count) {
817 pos = skb_put(skb, rates_len - count + 2);
818 *pos++ = WLAN_EID_EXT_SUPP_RATES;
819 *pos++ = rates_len - count;
820
821 for (i++; i < sband->n_bitrates; i++) {
822 if (BIT(i) & rates) {
823 int rate = sband->bitrates[i].bitrate;
824 *pos++ = (u8) (rate / 5);
825 }
826 }
827 }
828
829 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
830 /* 1. power capabilities */
831 pos = skb_put(skb, 4);
832 *pos++ = WLAN_EID_PWR_CAPABILITY;
833 *pos++ = 2;
834 *pos++ = 0; /* min tx power */
835 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
836
837 /* 2. supported channels */
838 /* TODO: get this in reg domain format */
839 pos = skb_put(skb, 2 * sband->n_channels + 2);
840 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
841 *pos++ = 2 * sband->n_channels;
842 for (i = 0; i < sband->n_channels; i++) {
843 *pos++ = ieee80211_frequency_to_channel(
844 sband->channels[i].center_freq);
845 *pos++ = 1; /* one channel in the subband*/
846 }
847 }
848
849 if (ifsta->extra_ie) {
850 pos = skb_put(skb, ifsta->extra_ie_len);
851 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
852 }
853
854 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
855 pos = skb_put(skb, 9);
856 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
857 *pos++ = 7; /* len */
858 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
859 *pos++ = 0x50;
860 *pos++ = 0xf2;
861 *pos++ = 2; /* WME */
862 *pos++ = 0; /* WME info */
863 *pos++ = 1; /* WME ver */
864 *pos++ = 0;
865 }
866
867 /* wmm support is a must to HT */
868 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
869 sband->ht_info.ht_supported && bss->ht_add_ie) {
870 struct ieee80211_ht_addt_info *ht_add_info =
871 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
872 u16 cap = sband->ht_info.cap;
873 __le16 tmp;
874 u32 flags = local->hw.conf.channel->flags;
875
876 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
877 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
878 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
879 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
880 cap &= ~IEEE80211_HT_CAP_SGI_40;
881 }
882 break;
883 case IEEE80211_HT_IE_CHA_SEC_BELOW:
884 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
885 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
886 cap &= ~IEEE80211_HT_CAP_SGI_40;
887 }
888 break;
889 }
890
891 tmp = cpu_to_le16(cap);
892 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
893 *pos++ = WLAN_EID_HT_CAPABILITY;
894 *pos++ = sizeof(struct ieee80211_ht_cap);
895 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
896 memcpy(pos, &tmp, sizeof(u16));
897 pos += sizeof(u16);
898 /* TODO: needs a define here for << 2 */
899 *pos++ = sband->ht_info.ampdu_factor |
900 (sband->ht_info.ampdu_density << 2);
901 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
902 }
903
904 kfree(ifsta->assocreq_ies);
905 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
906 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
907 if (ifsta->assocreq_ies)
908 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
909
910 ieee80211_sta_tx(dev, skb, 0);
911 }
912
913
914 static void ieee80211_send_deauth(struct net_device *dev,
915 struct ieee80211_if_sta *ifsta, u16 reason)
916 {
917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
918 struct sk_buff *skb;
919 struct ieee80211_mgmt *mgmt;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
922 if (!skb) {
923 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
924 "frame\n", dev->name);
925 return;
926 }
927 skb_reserve(skb, local->hw.extra_tx_headroom);
928
929 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
930 memset(mgmt, 0, 24);
931 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
932 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
933 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
934 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
935 IEEE80211_STYPE_DEAUTH);
936 skb_put(skb, 2);
937 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
938
939 ieee80211_sta_tx(dev, skb, 0);
940 }
941
942
943 static void ieee80211_send_disassoc(struct net_device *dev,
944 struct ieee80211_if_sta *ifsta, u16 reason)
945 {
946 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
947 struct sk_buff *skb;
948 struct ieee80211_mgmt *mgmt;
949
950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
951 if (!skb) {
952 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
953 "frame\n", dev->name);
954 return;
955 }
956 skb_reserve(skb, local->hw.extra_tx_headroom);
957
958 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
959 memset(mgmt, 0, 24);
960 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
961 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
962 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
963 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
964 IEEE80211_STYPE_DISASSOC);
965 skb_put(skb, 2);
966 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
967
968 ieee80211_sta_tx(dev, skb, 0);
969 }
970
971
972 static int ieee80211_privacy_mismatch(struct net_device *dev,
973 struct ieee80211_if_sta *ifsta)
974 {
975 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
976 struct ieee80211_sta_bss *bss;
977 int bss_privacy;
978 int wep_privacy;
979 int privacy_invoked;
980
981 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
982 return 0;
983
984 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
985 local->hw.conf.channel->center_freq,
986 ifsta->ssid, ifsta->ssid_len);
987 if (!bss)
988 return 0;
989
990 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
991 wep_privacy = !!ieee80211_sta_wep_configured(dev);
992 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
993
994 ieee80211_rx_bss_put(local, bss);
995
996 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
997 return 0;
998
999 return 1;
1000 }
1001
1002
1003 static void ieee80211_associate(struct net_device *dev,
1004 struct ieee80211_if_sta *ifsta)
1005 {
1006 DECLARE_MAC_BUF(mac);
1007
1008 ifsta->assoc_tries++;
1009 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1010 printk(KERN_DEBUG "%s: association with AP %s"
1011 " timed out\n",
1012 dev->name, print_mac(mac, ifsta->bssid));
1013 ifsta->state = IEEE80211_DISABLED;
1014 return;
1015 }
1016
1017 ifsta->state = IEEE80211_ASSOCIATE;
1018 printk(KERN_DEBUG "%s: associate with AP %s\n",
1019 dev->name, print_mac(mac, ifsta->bssid));
1020 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1021 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1022 "mixed-cell disabled - abort association\n", dev->name);
1023 ifsta->state = IEEE80211_DISABLED;
1024 return;
1025 }
1026
1027 ieee80211_send_assoc(dev, ifsta);
1028
1029 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1030 }
1031
1032
1033 static void ieee80211_associated(struct net_device *dev,
1034 struct ieee80211_if_sta *ifsta)
1035 {
1036 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1037 struct sta_info *sta;
1038 int disassoc;
1039 DECLARE_MAC_BUF(mac);
1040
1041 /* TODO: start monitoring current AP signal quality and number of
1042 * missed beacons. Scan other channels every now and then and search
1043 * for better APs. */
1044 /* TODO: remove expired BSSes */
1045
1046 ifsta->state = IEEE80211_ASSOCIATED;
1047
1048 rcu_read_lock();
1049
1050 sta = sta_info_get(local, ifsta->bssid);
1051 if (!sta) {
1052 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1053 dev->name, print_mac(mac, ifsta->bssid));
1054 disassoc = 1;
1055 } else {
1056 disassoc = 0;
1057 if (time_after(jiffies,
1058 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1059 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1060 printk(KERN_DEBUG "%s: No ProbeResp from "
1061 "current AP %s - assume out of "
1062 "range\n",
1063 dev->name, print_mac(mac, ifsta->bssid));
1064 disassoc = 1;
1065 sta_info_unlink(&sta);
1066 } else
1067 ieee80211_send_probe_req(dev, ifsta->bssid,
1068 local->scan_ssid,
1069 local->scan_ssid_len);
1070 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1071 } else {
1072 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1073 if (time_after(jiffies, ifsta->last_probe +
1074 IEEE80211_PROBE_INTERVAL)) {
1075 ifsta->last_probe = jiffies;
1076 ieee80211_send_probe_req(dev, ifsta->bssid,
1077 ifsta->ssid,
1078 ifsta->ssid_len);
1079 }
1080 }
1081 }
1082
1083 rcu_read_unlock();
1084
1085 if (disassoc && sta)
1086 sta_info_destroy(sta);
1087
1088 if (disassoc) {
1089 ifsta->state = IEEE80211_DISABLED;
1090 ieee80211_set_associated(dev, ifsta, 0);
1091 } else {
1092 mod_timer(&ifsta->timer, jiffies +
1093 IEEE80211_MONITORING_INTERVAL);
1094 }
1095 }
1096
1097
1098 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1099 u8 *ssid, size_t ssid_len)
1100 {
1101 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1102 struct ieee80211_supported_band *sband;
1103 struct sk_buff *skb;
1104 struct ieee80211_mgmt *mgmt;
1105 u8 *pos, *supp_rates, *esupp_rates = NULL;
1106 int i;
1107
1108 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1109 if (!skb) {
1110 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1111 "request\n", dev->name);
1112 return;
1113 }
1114 skb_reserve(skb, local->hw.extra_tx_headroom);
1115
1116 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1117 memset(mgmt, 0, 24);
1118 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1119 IEEE80211_STYPE_PROBE_REQ);
1120 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1121 if (dst) {
1122 memcpy(mgmt->da, dst, ETH_ALEN);
1123 memcpy(mgmt->bssid, dst, ETH_ALEN);
1124 } else {
1125 memset(mgmt->da, 0xff, ETH_ALEN);
1126 memset(mgmt->bssid, 0xff, ETH_ALEN);
1127 }
1128 pos = skb_put(skb, 2 + ssid_len);
1129 *pos++ = WLAN_EID_SSID;
1130 *pos++ = ssid_len;
1131 memcpy(pos, ssid, ssid_len);
1132
1133 supp_rates = skb_put(skb, 2);
1134 supp_rates[0] = WLAN_EID_SUPP_RATES;
1135 supp_rates[1] = 0;
1136 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1137
1138 for (i = 0; i < sband->n_bitrates; i++) {
1139 struct ieee80211_rate *rate = &sband->bitrates[i];
1140 if (esupp_rates) {
1141 pos = skb_put(skb, 1);
1142 esupp_rates[1]++;
1143 } else if (supp_rates[1] == 8) {
1144 esupp_rates = skb_put(skb, 3);
1145 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1146 esupp_rates[1] = 1;
1147 pos = &esupp_rates[2];
1148 } else {
1149 pos = skb_put(skb, 1);
1150 supp_rates[1]++;
1151 }
1152 *pos = rate->bitrate / 5;
1153 }
1154
1155 ieee80211_sta_tx(dev, skb, 0);
1156 }
1157
1158
1159 static int ieee80211_sta_wep_configured(struct net_device *dev)
1160 {
1161 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1162 if (!sdata || !sdata->default_key ||
1163 sdata->default_key->conf.alg != ALG_WEP)
1164 return 0;
1165 return 1;
1166 }
1167
1168
1169 static void ieee80211_auth_completed(struct net_device *dev,
1170 struct ieee80211_if_sta *ifsta)
1171 {
1172 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1173 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1174 ieee80211_associate(dev, ifsta);
1175 }
1176
1177
1178 static void ieee80211_auth_challenge(struct net_device *dev,
1179 struct ieee80211_if_sta *ifsta,
1180 struct ieee80211_mgmt *mgmt,
1181 size_t len)
1182 {
1183 u8 *pos;
1184 struct ieee802_11_elems elems;
1185
1186 pos = mgmt->u.auth.variable;
1187 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1188 if (!elems.challenge)
1189 return;
1190 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1191 elems.challenge_len + 2, 1);
1192 }
1193
1194 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1195 u8 dialog_token, u16 status, u16 policy,
1196 u16 buf_size, u16 timeout)
1197 {
1198 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1199 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1200 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1201 struct sk_buff *skb;
1202 struct ieee80211_mgmt *mgmt;
1203 u16 capab;
1204
1205 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1206
1207 if (!skb) {
1208 printk(KERN_DEBUG "%s: failed to allocate buffer "
1209 "for addba resp frame\n", dev->name);
1210 return;
1211 }
1212
1213 skb_reserve(skb, local->hw.extra_tx_headroom);
1214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1215 memset(mgmt, 0, 24);
1216 memcpy(mgmt->da, da, ETH_ALEN);
1217 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1218 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1219 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1220 else
1221 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1222 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1223 IEEE80211_STYPE_ACTION);
1224
1225 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1226 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1227 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1228 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1229
1230 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1231 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1232 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1233
1234 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1235 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1236 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1237
1238 ieee80211_sta_tx(dev, skb, 0);
1239
1240 return;
1241 }
1242
1243 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1244 u16 tid, u8 dialog_token, u16 start_seq_num,
1245 u16 agg_size, u16 timeout)
1246 {
1247 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1248 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1249 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1250 struct sk_buff *skb;
1251 struct ieee80211_mgmt *mgmt;
1252 u16 capab;
1253
1254 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1255
1256 if (!skb) {
1257 printk(KERN_ERR "%s: failed to allocate buffer "
1258 "for addba request frame\n", dev->name);
1259 return;
1260 }
1261 skb_reserve(skb, local->hw.extra_tx_headroom);
1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1263 memset(mgmt, 0, 24);
1264 memcpy(mgmt->da, da, ETH_ALEN);
1265 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1266 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1267 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1268 else
1269 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1270
1271 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1272 IEEE80211_STYPE_ACTION);
1273
1274 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1275
1276 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1277 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1278
1279 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1280 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1281 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1282 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1283
1284 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1285
1286 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1287 mgmt->u.action.u.addba_req.start_seq_num =
1288 cpu_to_le16(start_seq_num << 4);
1289
1290 ieee80211_sta_tx(dev, skb, 0);
1291 }
1292
1293 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1294 struct ieee80211_mgmt *mgmt,
1295 size_t len)
1296 {
1297 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1298 struct ieee80211_hw *hw = &local->hw;
1299 struct ieee80211_conf *conf = &hw->conf;
1300 struct sta_info *sta;
1301 struct tid_ampdu_rx *tid_agg_rx;
1302 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1303 u8 dialog_token;
1304 int ret = -EOPNOTSUPP;
1305 DECLARE_MAC_BUF(mac);
1306
1307 rcu_read_lock();
1308
1309 sta = sta_info_get(local, mgmt->sa);
1310 if (!sta) {
1311 rcu_read_unlock();
1312 return;
1313 }
1314
1315 /* extract session parameters from addba request frame */
1316 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1317 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1318 start_seq_num =
1319 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1320
1321 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1322 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1323 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1324 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1325
1326 status = WLAN_STATUS_REQUEST_DECLINED;
1327
1328 /* sanity check for incoming parameters:
1329 * check if configuration can support the BA policy
1330 * and if buffer size does not exceeds max value */
1331 if (((ba_policy != 1)
1332 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1333 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1334 status = WLAN_STATUS_INVALID_QOS_PARAM;
1335 #ifdef CONFIG_MAC80211_HT_DEBUG
1336 if (net_ratelimit())
1337 printk(KERN_DEBUG "AddBA Req with bad params from "
1338 "%s on tid %u. policy %d, buffer size %d\n",
1339 print_mac(mac, mgmt->sa), tid, ba_policy,
1340 buf_size);
1341 #endif /* CONFIG_MAC80211_HT_DEBUG */
1342 goto end_no_lock;
1343 }
1344 /* determine default buffer size */
1345 if (buf_size == 0) {
1346 struct ieee80211_supported_band *sband;
1347
1348 sband = local->hw.wiphy->bands[conf->channel->band];
1349 buf_size = IEEE80211_MIN_AMPDU_BUF;
1350 buf_size = buf_size << sband->ht_info.ampdu_factor;
1351 }
1352
1353
1354 /* examine state machine */
1355 spin_lock_bh(&sta->lock);
1356
1357 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1358 #ifdef CONFIG_MAC80211_HT_DEBUG
1359 if (net_ratelimit())
1360 printk(KERN_DEBUG "unexpected AddBA Req from "
1361 "%s on tid %u\n",
1362 print_mac(mac, mgmt->sa), tid);
1363 #endif /* CONFIG_MAC80211_HT_DEBUG */
1364 goto end;
1365 }
1366
1367 /* prepare A-MPDU MLME for Rx aggregation */
1368 sta->ampdu_mlme.tid_rx[tid] =
1369 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1370 if (!sta->ampdu_mlme.tid_rx[tid]) {
1371 #ifdef CONFIG_MAC80211_HT_DEBUG
1372 if (net_ratelimit())
1373 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1374 tid);
1375 #endif
1376 goto end;
1377 }
1378 /* rx timer */
1379 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1380 sta_rx_agg_session_timer_expired;
1381 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1382 (unsigned long)&sta->timer_to_tid[tid];
1383 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1384
1385 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1386
1387 /* prepare reordering buffer */
1388 tid_agg_rx->reorder_buf =
1389 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1390 if (!tid_agg_rx->reorder_buf) {
1391 #ifdef CONFIG_MAC80211_HT_DEBUG
1392 if (net_ratelimit())
1393 printk(KERN_ERR "can not allocate reordering buffer "
1394 "to tid %d\n", tid);
1395 #endif
1396 kfree(sta->ampdu_mlme.tid_rx[tid]);
1397 goto end;
1398 }
1399 memset(tid_agg_rx->reorder_buf, 0,
1400 buf_size * sizeof(struct sk_buff *));
1401
1402 if (local->ops->ampdu_action)
1403 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1404 sta->addr, tid, &start_seq_num);
1405 #ifdef CONFIG_MAC80211_HT_DEBUG
1406 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1407 #endif /* CONFIG_MAC80211_HT_DEBUG */
1408
1409 if (ret) {
1410 kfree(tid_agg_rx->reorder_buf);
1411 kfree(tid_agg_rx);
1412 sta->ampdu_mlme.tid_rx[tid] = NULL;
1413 goto end;
1414 }
1415
1416 /* change state and send addba resp */
1417 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1418 tid_agg_rx->dialog_token = dialog_token;
1419 tid_agg_rx->ssn = start_seq_num;
1420 tid_agg_rx->head_seq_num = start_seq_num;
1421 tid_agg_rx->buf_size = buf_size;
1422 tid_agg_rx->timeout = timeout;
1423 tid_agg_rx->stored_mpdu_num = 0;
1424 status = WLAN_STATUS_SUCCESS;
1425 end:
1426 spin_unlock_bh(&sta->lock);
1427
1428 end_no_lock:
1429 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1430 dialog_token, status, 1, buf_size, timeout);
1431 rcu_read_unlock();
1432 }
1433
1434 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1435 struct ieee80211_mgmt *mgmt,
1436 size_t len)
1437 {
1438 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1439 struct ieee80211_hw *hw = &local->hw;
1440 struct sta_info *sta;
1441 u16 capab;
1442 u16 tid;
1443 u8 *state;
1444
1445 rcu_read_lock();
1446
1447 sta = sta_info_get(local, mgmt->sa);
1448 if (!sta) {
1449 rcu_read_unlock();
1450 return;
1451 }
1452
1453 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1454 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1455
1456 state = &sta->ampdu_mlme.tid_state_tx[tid];
1457
1458 spin_lock_bh(&sta->lock);
1459
1460 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1461 spin_unlock_bh(&sta->lock);
1462 goto addba_resp_exit;
1463 }
1464
1465 if (mgmt->u.action.u.addba_resp.dialog_token !=
1466 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1467 spin_unlock_bh(&sta->lock);
1468 #ifdef CONFIG_MAC80211_HT_DEBUG
1469 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1470 #endif /* CONFIG_MAC80211_HT_DEBUG */
1471 goto addba_resp_exit;
1472 }
1473
1474 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1475 #ifdef CONFIG_MAC80211_HT_DEBUG
1476 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1477 #endif /* CONFIG_MAC80211_HT_DEBUG */
1478 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1479 == WLAN_STATUS_SUCCESS) {
1480 *state |= HT_ADDBA_RECEIVED_MSK;
1481 sta->ampdu_mlme.addba_req_num[tid] = 0;
1482
1483 if (*state == HT_AGG_STATE_OPERATIONAL)
1484 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1485
1486 spin_unlock_bh(&sta->lock);
1487 } else {
1488 sta->ampdu_mlme.addba_req_num[tid]++;
1489 /* this will allow the state check in stop_BA_session */
1490 *state = HT_AGG_STATE_OPERATIONAL;
1491 spin_unlock_bh(&sta->lock);
1492 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1493 WLAN_BACK_INITIATOR);
1494 }
1495
1496 addba_resp_exit:
1497 rcu_read_unlock();
1498 }
1499
1500 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1501 u16 initiator, u16 reason_code)
1502 {
1503 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1504 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1505 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1506 struct sk_buff *skb;
1507 struct ieee80211_mgmt *mgmt;
1508 u16 params;
1509
1510 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1511
1512 if (!skb) {
1513 printk(KERN_ERR "%s: failed to allocate buffer "
1514 "for delba frame\n", dev->name);
1515 return;
1516 }
1517
1518 skb_reserve(skb, local->hw.extra_tx_headroom);
1519 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1520 memset(mgmt, 0, 24);
1521 memcpy(mgmt->da, da, ETH_ALEN);
1522 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1523 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1524 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1525 else
1526 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1527 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1528 IEEE80211_STYPE_ACTION);
1529
1530 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1531
1532 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1533 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1534 params = (u16)(initiator << 11); /* bit 11 initiator */
1535 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1536
1537 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1538 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1539
1540 ieee80211_sta_tx(dev, skb, 0);
1541 }
1542
1543 void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn)
1544 {
1545 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1546 struct sk_buff *skb;
1547 struct ieee80211_bar *bar;
1548 u16 bar_control = 0;
1549
1550 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1551 if (!skb) {
1552 printk(KERN_ERR "%s: failed to allocate buffer for "
1553 "bar frame\n", dev->name);
1554 return;
1555 }
1556 skb_reserve(skb, local->hw.extra_tx_headroom);
1557 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1558 memset(bar, 0, sizeof(*bar));
1559 bar->frame_control = IEEE80211_FC(IEEE80211_FTYPE_CTL,
1560 IEEE80211_STYPE_BACK_REQ);
1561 memcpy(bar->ra, ra, ETH_ALEN);
1562 memcpy(bar->ta, dev->dev_addr, ETH_ALEN);
1563 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1564 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1565 bar_control |= (u16)(tid << 12);
1566 bar->control = cpu_to_le16(bar_control);
1567 bar->start_seq_num = cpu_to_le16(ssn);
1568
1569 ieee80211_sta_tx(dev, skb, 0);
1570 }
1571
1572 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1573 u16 initiator, u16 reason)
1574 {
1575 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1576 struct ieee80211_hw *hw = &local->hw;
1577 struct sta_info *sta;
1578 int ret, i;
1579 DECLARE_MAC_BUF(mac);
1580
1581 rcu_read_lock();
1582
1583 sta = sta_info_get(local, ra);
1584 if (!sta) {
1585 rcu_read_unlock();
1586 return;
1587 }
1588
1589 /* check if TID is in operational state */
1590 spin_lock_bh(&sta->lock);
1591 if (sta->ampdu_mlme.tid_state_rx[tid]
1592 != HT_AGG_STATE_OPERATIONAL) {
1593 spin_unlock_bh(&sta->lock);
1594 rcu_read_unlock();
1595 return;
1596 }
1597 sta->ampdu_mlme.tid_state_rx[tid] =
1598 HT_AGG_STATE_REQ_STOP_BA_MSK |
1599 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1600 spin_unlock_bh(&sta->lock);
1601
1602 /* stop HW Rx aggregation. ampdu_action existence
1603 * already verified in session init so we add the BUG_ON */
1604 BUG_ON(!local->ops->ampdu_action);
1605
1606 #ifdef CONFIG_MAC80211_HT_DEBUG
1607 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1608 print_mac(mac, ra), tid);
1609 #endif /* CONFIG_MAC80211_HT_DEBUG */
1610
1611 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1612 ra, tid, NULL);
1613 if (ret)
1614 printk(KERN_DEBUG "HW problem - can not stop rx "
1615 "aggregation for tid %d\n", tid);
1616
1617 /* shutdown timer has not expired */
1618 if (initiator != WLAN_BACK_TIMER)
1619 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1620
1621 /* check if this is a self generated aggregation halt */
1622 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1623 ieee80211_send_delba(dev, ra, tid, 0, reason);
1624
1625 /* free the reordering buffer */
1626 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1627 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1628 /* release the reordered frames */
1629 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1630 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1631 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1632 }
1633 }
1634 /* free resources */
1635 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1636 kfree(sta->ampdu_mlme.tid_rx[tid]);
1637 sta->ampdu_mlme.tid_rx[tid] = NULL;
1638 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1639
1640 rcu_read_unlock();
1641 }
1642
1643
1644 static void ieee80211_sta_process_delba(struct net_device *dev,
1645 struct ieee80211_mgmt *mgmt, size_t len)
1646 {
1647 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1648 struct sta_info *sta;
1649 u16 tid, params;
1650 u16 initiator;
1651 DECLARE_MAC_BUF(mac);
1652
1653 rcu_read_lock();
1654
1655 sta = sta_info_get(local, mgmt->sa);
1656 if (!sta) {
1657 rcu_read_unlock();
1658 return;
1659 }
1660
1661 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1662 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1663 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1664
1665 #ifdef CONFIG_MAC80211_HT_DEBUG
1666 if (net_ratelimit())
1667 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1668 print_mac(mac, mgmt->sa),
1669 initiator ? "initiator" : "recipient", tid,
1670 mgmt->u.action.u.delba.reason_code);
1671 #endif /* CONFIG_MAC80211_HT_DEBUG */
1672
1673 if (initiator == WLAN_BACK_INITIATOR)
1674 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1675 WLAN_BACK_INITIATOR, 0);
1676 else { /* WLAN_BACK_RECIPIENT */
1677 spin_lock_bh(&sta->lock);
1678 sta->ampdu_mlme.tid_state_tx[tid] =
1679 HT_AGG_STATE_OPERATIONAL;
1680 spin_unlock_bh(&sta->lock);
1681 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1682 WLAN_BACK_RECIPIENT);
1683 }
1684 rcu_read_unlock();
1685 }
1686
1687 /*
1688 * After sending add Block Ack request we activated a timer until
1689 * add Block Ack response will arrive from the recipient.
1690 * If this timer expires sta_addba_resp_timer_expired will be executed.
1691 */
1692 void sta_addba_resp_timer_expired(unsigned long data)
1693 {
1694 /* not an elegant detour, but there is no choice as the timer passes
1695 * only one argument, and both sta_info and TID are needed, so init
1696 * flow in sta_info_create gives the TID as data, while the timer_to_id
1697 * array gives the sta through container_of */
1698 u16 tid = *(u8 *)data;
1699 struct sta_info *temp_sta = container_of((void *)data,
1700 struct sta_info, timer_to_tid[tid]);
1701
1702 struct ieee80211_local *local = temp_sta->local;
1703 struct ieee80211_hw *hw = &local->hw;
1704 struct sta_info *sta;
1705 u8 *state;
1706
1707 rcu_read_lock();
1708
1709 sta = sta_info_get(local, temp_sta->addr);
1710 if (!sta) {
1711 rcu_read_unlock();
1712 return;
1713 }
1714
1715 state = &sta->ampdu_mlme.tid_state_tx[tid];
1716 /* check if the TID waits for addBA response */
1717 spin_lock_bh(&sta->lock);
1718 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1719 spin_unlock_bh(&sta->lock);
1720 *state = HT_AGG_STATE_IDLE;
1721 #ifdef CONFIG_MAC80211_HT_DEBUG
1722 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1723 "expecting addBA response there", tid);
1724 #endif
1725 goto timer_expired_exit;
1726 }
1727
1728 #ifdef CONFIG_MAC80211_HT_DEBUG
1729 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1730 #endif
1731
1732 /* go through the state check in stop_BA_session */
1733 *state = HT_AGG_STATE_OPERATIONAL;
1734 spin_unlock_bh(&sta->lock);
1735 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1736 WLAN_BACK_INITIATOR);
1737
1738 timer_expired_exit:
1739 rcu_read_unlock();
1740 }
1741
1742 /*
1743 * After accepting the AddBA Request we activated a timer,
1744 * resetting it after each frame that arrives from the originator.
1745 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1746 */
1747 static void sta_rx_agg_session_timer_expired(unsigned long data)
1748 {
1749 /* not an elegant detour, but there is no choice as the timer passes
1750 * only one argument, and various sta_info are needed here, so init
1751 * flow in sta_info_create gives the TID as data, while the timer_to_id
1752 * array gives the sta through container_of */
1753 u8 *ptid = (u8 *)data;
1754 u8 *timer_to_id = ptid - *ptid;
1755 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1756 timer_to_tid[0]);
1757
1758 #ifdef CONFIG_MAC80211_HT_DEBUG
1759 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1760 #endif
1761 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1762 (u16)*ptid, WLAN_BACK_TIMER,
1763 WLAN_REASON_QSTA_TIMEOUT);
1764 }
1765
1766 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1767 {
1768 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1769 int i;
1770
1771 for (i = 0; i < STA_TID_NUM; i++) {
1772 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1773 WLAN_BACK_INITIATOR);
1774 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1775 WLAN_BACK_RECIPIENT,
1776 WLAN_REASON_QSTA_LEAVE_QBSS);
1777 }
1778 }
1779
1780 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1781 struct ieee80211_msrment_ie *request_ie,
1782 const u8 *da, const u8 *bssid,
1783 u8 dialog_token)
1784 {
1785 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1786 struct sk_buff *skb;
1787 struct ieee80211_mgmt *msr_report;
1788
1789 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1790 sizeof(struct ieee80211_msrment_ie));
1791
1792 if (!skb) {
1793 printk(KERN_ERR "%s: failed to allocate buffer for "
1794 "measurement report frame\n", dev->name);
1795 return;
1796 }
1797
1798 skb_reserve(skb, local->hw.extra_tx_headroom);
1799 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1800 memset(msr_report, 0, 24);
1801 memcpy(msr_report->da, da, ETH_ALEN);
1802 memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1803 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1804 msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1805 IEEE80211_STYPE_ACTION);
1806
1807 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1808 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1809 msr_report->u.action.u.measurement.action_code =
1810 WLAN_ACTION_SPCT_MSR_RPRT;
1811 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1812
1813 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1814 msr_report->u.action.u.measurement.length =
1815 sizeof(struct ieee80211_msrment_ie);
1816
1817 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1818 sizeof(struct ieee80211_msrment_ie));
1819 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1820 msr_report->u.action.u.measurement.msr_elem.mode |=
1821 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1822 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1823
1824 ieee80211_sta_tx(dev, skb, 0);
1825 }
1826
1827 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1828 struct ieee80211_mgmt *mgmt,
1829 size_t len)
1830 {
1831 /*
1832 * Ignoring measurement request is spec violation.
1833 * Mandatory measurements must be reported optional
1834 * measurements might be refused or reported incapable
1835 * For now just refuse
1836 * TODO: Answer basic measurement as unmeasured
1837 */
1838 ieee80211_send_refuse_measurement_request(dev,
1839 &mgmt->u.action.u.measurement.msr_elem,
1840 mgmt->sa, mgmt->bssid,
1841 mgmt->u.action.u.measurement.dialog_token);
1842 }
1843
1844
1845 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1846 struct ieee80211_if_sta *ifsta,
1847 struct ieee80211_mgmt *mgmt,
1848 size_t len)
1849 {
1850 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1851 u16 auth_alg, auth_transaction, status_code;
1852 DECLARE_MAC_BUF(mac);
1853
1854 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1855 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1856 return;
1857
1858 if (len < 24 + 6)
1859 return;
1860
1861 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1862 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1863 return;
1864
1865 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1866 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1867 return;
1868
1869 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1870 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1871 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1872
1873 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1874 /*
1875 * IEEE 802.11 standard does not require authentication in IBSS
1876 * networks and most implementations do not seem to use it.
1877 * However, try to reply to authentication attempts if someone
1878 * has actually implemented this.
1879 */
1880 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1881 return;
1882 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1883 }
1884
1885 if (auth_alg != ifsta->auth_alg ||
1886 auth_transaction != ifsta->auth_transaction)
1887 return;
1888
1889 if (status_code != WLAN_STATUS_SUCCESS) {
1890 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1891 u8 algs[3];
1892 const int num_algs = ARRAY_SIZE(algs);
1893 int i, pos;
1894 algs[0] = algs[1] = algs[2] = 0xff;
1895 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1896 algs[0] = WLAN_AUTH_OPEN;
1897 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1898 algs[1] = WLAN_AUTH_SHARED_KEY;
1899 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1900 algs[2] = WLAN_AUTH_LEAP;
1901 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1902 pos = 0;
1903 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1904 pos = 1;
1905 else
1906 pos = 2;
1907 for (i = 0; i < num_algs; i++) {
1908 pos++;
1909 if (pos >= num_algs)
1910 pos = 0;
1911 if (algs[pos] == ifsta->auth_alg ||
1912 algs[pos] == 0xff)
1913 continue;
1914 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1915 !ieee80211_sta_wep_configured(dev))
1916 continue;
1917 ifsta->auth_alg = algs[pos];
1918 break;
1919 }
1920 }
1921 return;
1922 }
1923
1924 switch (ifsta->auth_alg) {
1925 case WLAN_AUTH_OPEN:
1926 case WLAN_AUTH_LEAP:
1927 ieee80211_auth_completed(dev, ifsta);
1928 break;
1929 case WLAN_AUTH_SHARED_KEY:
1930 if (ifsta->auth_transaction == 4)
1931 ieee80211_auth_completed(dev, ifsta);
1932 else
1933 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1934 break;
1935 }
1936 }
1937
1938
1939 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1940 struct ieee80211_if_sta *ifsta,
1941 struct ieee80211_mgmt *mgmt,
1942 size_t len)
1943 {
1944 u16 reason_code;
1945 DECLARE_MAC_BUF(mac);
1946
1947 if (len < 24 + 2)
1948 return;
1949
1950 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1951 return;
1952
1953 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1954
1955 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1956 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1957
1958 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1959 ifsta->state == IEEE80211_ASSOCIATE ||
1960 ifsta->state == IEEE80211_ASSOCIATED) {
1961 ifsta->state = IEEE80211_AUTHENTICATE;
1962 mod_timer(&ifsta->timer, jiffies +
1963 IEEE80211_RETRY_AUTH_INTERVAL);
1964 }
1965
1966 ieee80211_set_disassoc(dev, ifsta, 1);
1967 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1968 }
1969
1970
1971 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1972 struct ieee80211_if_sta *ifsta,
1973 struct ieee80211_mgmt *mgmt,
1974 size_t len)
1975 {
1976 u16 reason_code;
1977 DECLARE_MAC_BUF(mac);
1978
1979 if (len < 24 + 2)
1980 return;
1981
1982 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1983 return;
1984
1985 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1986
1987 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1988 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1989
1990 if (ifsta->state == IEEE80211_ASSOCIATED) {
1991 ifsta->state = IEEE80211_ASSOCIATE;
1992 mod_timer(&ifsta->timer, jiffies +
1993 IEEE80211_RETRY_AUTH_INTERVAL);
1994 }
1995
1996 ieee80211_set_disassoc(dev, ifsta, 0);
1997 }
1998
1999
2000 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2001 struct ieee80211_if_sta *ifsta,
2002 struct ieee80211_mgmt *mgmt,
2003 size_t len,
2004 int reassoc)
2005 {
2006 struct ieee80211_local *local = sdata->local;
2007 struct net_device *dev = sdata->dev;
2008 struct ieee80211_supported_band *sband;
2009 struct sta_info *sta;
2010 u64 rates, basic_rates;
2011 u16 capab_info, status_code, aid;
2012 struct ieee802_11_elems elems;
2013 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2014 u8 *pos;
2015 int i, j;
2016 DECLARE_MAC_BUF(mac);
2017 bool have_higher_than_11mbit = false;
2018
2019 /* AssocResp and ReassocResp have identical structure, so process both
2020 * of them in this function. */
2021
2022 if (ifsta->state != IEEE80211_ASSOCIATE)
2023 return;
2024
2025 if (len < 24 + 6)
2026 return;
2027
2028 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2029 return;
2030
2031 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2032 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2033 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2034
2035 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2036 "status=%d aid=%d)\n",
2037 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2038 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2039
2040 if (status_code != WLAN_STATUS_SUCCESS) {
2041 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2042 dev->name, status_code);
2043 /* if this was a reassociation, ensure we try a "full"
2044 * association next time. This works around some broken APs
2045 * which do not correctly reject reassociation requests. */
2046 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2047 return;
2048 }
2049
2050 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2051 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2052 "set\n", dev->name, aid);
2053 aid &= ~(BIT(15) | BIT(14));
2054
2055 pos = mgmt->u.assoc_resp.variable;
2056 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2057
2058 if (!elems.supp_rates) {
2059 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2060 dev->name);
2061 return;
2062 }
2063
2064 printk(KERN_DEBUG "%s: associated\n", dev->name);
2065 ifsta->aid = aid;
2066 ifsta->ap_capab = capab_info;
2067
2068 kfree(ifsta->assocresp_ies);
2069 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2070 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2071 if (ifsta->assocresp_ies)
2072 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2073
2074 rcu_read_lock();
2075
2076 /* Add STA entry for the AP */
2077 sta = sta_info_get(local, ifsta->bssid);
2078 if (!sta) {
2079 struct ieee80211_sta_bss *bss;
2080 int err;
2081
2082 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2083 if (!sta) {
2084 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2085 " the AP\n", dev->name);
2086 rcu_read_unlock();
2087 return;
2088 }
2089 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2090 local->hw.conf.channel->center_freq,
2091 ifsta->ssid, ifsta->ssid_len);
2092 if (bss) {
2093 sta->last_signal = bss->signal;
2094 sta->last_qual = bss->qual;
2095 sta->last_noise = bss->noise;
2096 ieee80211_rx_bss_put(local, bss);
2097 }
2098
2099 err = sta_info_insert(sta);
2100 if (err) {
2101 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2102 " the AP (error %d)\n", dev->name, err);
2103 rcu_read_unlock();
2104 return;
2105 }
2106 /* update new sta with its last rx activity */
2107 sta->last_rx = jiffies;
2108 }
2109
2110 /*
2111 * FIXME: Do we really need to update the sta_info's information here?
2112 * We already know about the AP (we found it in our list) so it
2113 * should already be filled with the right info, no?
2114 * As is stands, all this is racy because typically we assume
2115 * the information that is filled in here (except flags) doesn't
2116 * change while a STA structure is alive. As such, it should move
2117 * to between the sta_info_alloc() and sta_info_insert() above.
2118 */
2119
2120 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2121 WLAN_STA_AUTHORIZED);
2122
2123 rates = 0;
2124 basic_rates = 0;
2125 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2126
2127 for (i = 0; i < elems.supp_rates_len; i++) {
2128 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2129
2130 if (rate > 110)
2131 have_higher_than_11mbit = true;
2132
2133 for (j = 0; j < sband->n_bitrates; j++) {
2134 if (sband->bitrates[j].bitrate == rate)
2135 rates |= BIT(j);
2136 if (elems.supp_rates[i] & 0x80)
2137 basic_rates |= BIT(j);
2138 }
2139 }
2140
2141 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2142 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2143
2144 if (rate > 110)
2145 have_higher_than_11mbit = true;
2146
2147 for (j = 0; j < sband->n_bitrates; j++) {
2148 if (sband->bitrates[j].bitrate == rate)
2149 rates |= BIT(j);
2150 if (elems.ext_supp_rates[i] & 0x80)
2151 basic_rates |= BIT(j);
2152 }
2153 }
2154
2155 sta->supp_rates[local->hw.conf.channel->band] = rates;
2156 sdata->basic_rates = basic_rates;
2157
2158 /* cf. IEEE 802.11 9.2.12 */
2159 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2160 have_higher_than_11mbit)
2161 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2162 else
2163 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2164
2165 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2166 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2167 struct ieee80211_ht_bss_info bss_info;
2168 ieee80211_ht_cap_ie_to_ht_info(
2169 (struct ieee80211_ht_cap *)
2170 elems.ht_cap_elem, &sta->ht_info);
2171 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2172 (struct ieee80211_ht_addt_info *)
2173 elems.ht_info_elem, &bss_info);
2174 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2175 }
2176
2177 rate_control_rate_init(sta, local);
2178
2179 if (elems.wmm_param) {
2180 set_sta_flags(sta, WLAN_STA_WME);
2181 rcu_read_unlock();
2182 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2183 elems.wmm_param_len);
2184 } else
2185 rcu_read_unlock();
2186
2187 /* set AID and assoc capability,
2188 * ieee80211_set_associated() will tell the driver */
2189 bss_conf->aid = aid;
2190 bss_conf->assoc_capability = capab_info;
2191 ieee80211_set_associated(dev, ifsta, 1);
2192
2193 ieee80211_associated(dev, ifsta);
2194 }
2195
2196
2197 /* Caller must hold local->sta_bss_lock */
2198 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2199 struct ieee80211_sta_bss *bss)
2200 {
2201 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2202 u8 hash_idx;
2203
2204 if (bss_mesh_cfg(bss))
2205 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2206 bss_mesh_id_len(bss));
2207 else
2208 hash_idx = STA_HASH(bss->bssid);
2209
2210 bss->hnext = local->sta_bss_hash[hash_idx];
2211 local->sta_bss_hash[hash_idx] = bss;
2212 }
2213
2214
2215 /* Caller must hold local->sta_bss_lock */
2216 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2217 struct ieee80211_sta_bss *bss)
2218 {
2219 struct ieee80211_sta_bss *b, *prev = NULL;
2220 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2221 while (b) {
2222 if (b == bss) {
2223 if (!prev)
2224 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2225 bss->hnext;
2226 else
2227 prev->hnext = bss->hnext;
2228 break;
2229 }
2230 prev = b;
2231 b = b->hnext;
2232 }
2233 }
2234
2235
2236 static struct ieee80211_sta_bss *
2237 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2238 u8 *ssid, u8 ssid_len)
2239 {
2240 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2241 struct ieee80211_sta_bss *bss;
2242
2243 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2244 if (!bss)
2245 return NULL;
2246 atomic_inc(&bss->users);
2247 atomic_inc(&bss->users);
2248 memcpy(bss->bssid, bssid, ETH_ALEN);
2249 bss->freq = freq;
2250 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2251 memcpy(bss->ssid, ssid, ssid_len);
2252 bss->ssid_len = ssid_len;
2253 }
2254
2255 spin_lock_bh(&local->sta_bss_lock);
2256 /* TODO: order by RSSI? */
2257 list_add_tail(&bss->list, &local->sta_bss_list);
2258 __ieee80211_rx_bss_hash_add(dev, bss);
2259 spin_unlock_bh(&local->sta_bss_lock);
2260 return bss;
2261 }
2262
2263 static struct ieee80211_sta_bss *
2264 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2265 u8 *ssid, u8 ssid_len)
2266 {
2267 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2268 struct ieee80211_sta_bss *bss;
2269
2270 spin_lock_bh(&local->sta_bss_lock);
2271 bss = local->sta_bss_hash[STA_HASH(bssid)];
2272 while (bss) {
2273 if (!bss_mesh_cfg(bss) &&
2274 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2275 bss->freq == freq &&
2276 bss->ssid_len == ssid_len &&
2277 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2278 atomic_inc(&bss->users);
2279 break;
2280 }
2281 bss = bss->hnext;
2282 }
2283 spin_unlock_bh(&local->sta_bss_lock);
2284 return bss;
2285 }
2286
2287 #ifdef CONFIG_MAC80211_MESH
2288 static struct ieee80211_sta_bss *
2289 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2290 u8 *mesh_cfg, int freq)
2291 {
2292 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2293 struct ieee80211_sta_bss *bss;
2294
2295 spin_lock_bh(&local->sta_bss_lock);
2296 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2297 while (bss) {
2298 if (bss_mesh_cfg(bss) &&
2299 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2300 bss->freq == freq &&
2301 mesh_id_len == bss->mesh_id_len &&
2302 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2303 mesh_id_len))) {
2304 atomic_inc(&bss->users);
2305 break;
2306 }
2307 bss = bss->hnext;
2308 }
2309 spin_unlock_bh(&local->sta_bss_lock);
2310 return bss;
2311 }
2312
2313 static struct ieee80211_sta_bss *
2314 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2315 u8 *mesh_cfg, int mesh_config_len, int freq)
2316 {
2317 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2318 struct ieee80211_sta_bss *bss;
2319
2320 if (mesh_config_len != MESH_CFG_LEN)
2321 return NULL;
2322
2323 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2324 if (!bss)
2325 return NULL;
2326
2327 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2328 if (!bss->mesh_cfg) {
2329 kfree(bss);
2330 return NULL;
2331 }
2332
2333 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2334 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2335 if (!bss->mesh_id) {
2336 kfree(bss->mesh_cfg);
2337 kfree(bss);
2338 return NULL;
2339 }
2340 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2341 }
2342
2343 atomic_inc(&bss->users);
2344 atomic_inc(&bss->users);
2345 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2346 bss->mesh_id_len = mesh_id_len;
2347 bss->freq = freq;
2348 spin_lock_bh(&local->sta_bss_lock);
2349 /* TODO: order by RSSI? */
2350 list_add_tail(&bss->list, &local->sta_bss_list);
2351 __ieee80211_rx_bss_hash_add(dev, bss);
2352 spin_unlock_bh(&local->sta_bss_lock);
2353 return bss;
2354 }
2355 #endif
2356
2357 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2358 {
2359 kfree(bss->wpa_ie);
2360 kfree(bss->rsn_ie);
2361 kfree(bss->wmm_ie);
2362 kfree(bss->ht_ie);
2363 kfree(bss->ht_add_ie);
2364 kfree(bss_mesh_id(bss));
2365 kfree(bss_mesh_cfg(bss));
2366 kfree(bss);
2367 }
2368
2369
2370 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2371 struct ieee80211_sta_bss *bss)
2372 {
2373 local_bh_disable();
2374 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2375 local_bh_enable();
2376 return;
2377 }
2378
2379 __ieee80211_rx_bss_hash_del(local, bss);
2380 list_del(&bss->list);
2381 spin_unlock_bh(&local->sta_bss_lock);
2382 ieee80211_rx_bss_free(bss);
2383 }
2384
2385
2386 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2387 {
2388 spin_lock_init(&local->sta_bss_lock);
2389 INIT_LIST_HEAD(&local->sta_bss_list);
2390 }
2391
2392
2393 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2394 {
2395 struct ieee80211_sta_bss *bss, *tmp;
2396
2397 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2398 ieee80211_rx_bss_put(local, bss);
2399 }
2400
2401
2402 static int ieee80211_sta_join_ibss(struct net_device *dev,
2403 struct ieee80211_if_sta *ifsta,
2404 struct ieee80211_sta_bss *bss)
2405 {
2406 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2407 int res, rates, i, j;
2408 struct sk_buff *skb;
2409 struct ieee80211_mgmt *mgmt;
2410 u8 *pos;
2411 struct ieee80211_sub_if_data *sdata;
2412 struct ieee80211_supported_band *sband;
2413 union iwreq_data wrqu;
2414
2415 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2416
2417 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2418
2419 /* Remove possible STA entries from other IBSS networks. */
2420 sta_info_flush_delayed(sdata);
2421
2422 if (local->ops->reset_tsf) {
2423 /* Reset own TSF to allow time synchronization work. */
2424 local->ops->reset_tsf(local_to_hw(local));
2425 }
2426 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2427 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2428 if (res)
2429 return res;
2430
2431 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2432
2433 sdata->drop_unencrypted = bss->capability &
2434 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2435
2436 res = ieee80211_set_freq(dev, bss->freq);
2437
2438 if (res)
2439 return res;
2440
2441 /* Build IBSS probe response */
2442 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2443 if (skb) {
2444 skb_reserve(skb, local->hw.extra_tx_headroom);
2445
2446 mgmt = (struct ieee80211_mgmt *)
2447 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2448 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2449 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2450 IEEE80211_STYPE_PROBE_RESP);
2451 memset(mgmt->da, 0xff, ETH_ALEN);
2452 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2453 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2454 mgmt->u.beacon.beacon_int =
2455 cpu_to_le16(local->hw.conf.beacon_int);
2456 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2457 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2458
2459 pos = skb_put(skb, 2 + ifsta->ssid_len);
2460 *pos++ = WLAN_EID_SSID;
2461 *pos++ = ifsta->ssid_len;
2462 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2463
2464 rates = bss->supp_rates_len;
2465 if (rates > 8)
2466 rates = 8;
2467 pos = skb_put(skb, 2 + rates);
2468 *pos++ = WLAN_EID_SUPP_RATES;
2469 *pos++ = rates;
2470 memcpy(pos, bss->supp_rates, rates);
2471
2472 if (bss->band == IEEE80211_BAND_2GHZ) {
2473 pos = skb_put(skb, 2 + 1);
2474 *pos++ = WLAN_EID_DS_PARAMS;
2475 *pos++ = 1;
2476 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2477 }
2478
2479 pos = skb_put(skb, 2 + 2);
2480 *pos++ = WLAN_EID_IBSS_PARAMS;
2481 *pos++ = 2;
2482 /* FIX: set ATIM window based on scan results */
2483 *pos++ = 0;
2484 *pos++ = 0;
2485
2486 if (bss->supp_rates_len > 8) {
2487 rates = bss->supp_rates_len - 8;
2488 pos = skb_put(skb, 2 + rates);
2489 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2490 *pos++ = rates;
2491 memcpy(pos, &bss->supp_rates[8], rates);
2492 }
2493
2494 ifsta->probe_resp = skb;
2495
2496 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2497 }
2498
2499 rates = 0;
2500 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2501 for (i = 0; i < bss->supp_rates_len; i++) {
2502 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2503 for (j = 0; j < sband->n_bitrates; j++)
2504 if (sband->bitrates[j].bitrate == bitrate)
2505 rates |= BIT(j);
2506 }
2507 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2508
2509 ieee80211_sta_def_wmm_params(dev, bss, 1);
2510
2511 ifsta->state = IEEE80211_IBSS_JOINED;
2512 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2513
2514 memset(&wrqu, 0, sizeof(wrqu));
2515 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2516 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2517
2518 return res;
2519 }
2520
2521 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2522 struct ieee802_11_elems *elems,
2523 enum ieee80211_band band)
2524 {
2525 struct ieee80211_supported_band *sband;
2526 struct ieee80211_rate *bitrates;
2527 size_t num_rates;
2528 u64 supp_rates;
2529 int i, j;
2530 sband = local->hw.wiphy->bands[band];
2531
2532 if (!sband) {
2533 WARN_ON(1);
2534 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2535 }
2536
2537 bitrates = sband->bitrates;
2538 num_rates = sband->n_bitrates;
2539 supp_rates = 0;
2540 for (i = 0; i < elems->supp_rates_len +
2541 elems->ext_supp_rates_len; i++) {
2542 u8 rate = 0;
2543 int own_rate;
2544 if (i < elems->supp_rates_len)
2545 rate = elems->supp_rates[i];
2546 else if (elems->ext_supp_rates)
2547 rate = elems->ext_supp_rates
2548 [i - elems->supp_rates_len];
2549 own_rate = 5 * (rate & 0x7f);
2550 for (j = 0; j < num_rates; j++)
2551 if (bitrates[j].bitrate == own_rate)
2552 supp_rates |= BIT(j);
2553 }
2554 return supp_rates;
2555 }
2556
2557
2558 static void ieee80211_rx_bss_info(struct net_device *dev,
2559 struct ieee80211_mgmt *mgmt,
2560 size_t len,
2561 struct ieee80211_rx_status *rx_status,
2562 struct ieee802_11_elems *elems,
2563 int beacon)
2564 {
2565 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2566 int freq, clen;
2567 struct ieee80211_sta_bss *bss;
2568 struct sta_info *sta;
2569 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2570 u64 beacon_timestamp, rx_timestamp;
2571 struct ieee80211_channel *channel;
2572 DECLARE_MAC_BUF(mac);
2573 DECLARE_MAC_BUF(mac2);
2574
2575 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2576 return; /* ignore ProbeResp to foreign address */
2577
2578 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2579
2580 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2581 elems->mesh_config && mesh_matches_local(elems, dev)) {
2582 u64 rates = ieee80211_sta_get_rates(local, elems,
2583 rx_status->band);
2584
2585 mesh_neighbour_update(mgmt->sa, rates, dev,
2586 mesh_peer_accepts_plinks(elems, dev));
2587 }
2588
2589 rcu_read_lock();
2590
2591 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2592 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2593 (sta = sta_info_get(local, mgmt->sa))) {
2594 u64 prev_rates;
2595 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2596 rx_status->band);
2597
2598 prev_rates = sta->supp_rates[rx_status->band];
2599 sta->supp_rates[rx_status->band] &= supp_rates;
2600 if (sta->supp_rates[rx_status->band] == 0) {
2601 /* No matching rates - this should not really happen.
2602 * Make sure that at least one rate is marked
2603 * supported to avoid issues with TX rate ctrl. */
2604 sta->supp_rates[rx_status->band] =
2605 sdata->u.sta.supp_rates_bits[rx_status->band];
2606 }
2607 }
2608
2609 rcu_read_unlock();
2610
2611 if (elems->ds_params && elems->ds_params_len == 1)
2612 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2613 else
2614 freq = rx_status->freq;
2615
2616 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2617
2618 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2619 return;
2620
2621 #ifdef CONFIG_MAC80211_MESH
2622 if (elems->mesh_config)
2623 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2624 elems->mesh_id_len, elems->mesh_config, freq);
2625 else
2626 #endif
2627 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2628 elems->ssid, elems->ssid_len);
2629 if (!bss) {
2630 #ifdef CONFIG_MAC80211_MESH
2631 if (elems->mesh_config)
2632 bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2633 elems->mesh_id_len, elems->mesh_config,
2634 elems->mesh_config_len, freq);
2635 else
2636 #endif
2637 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2638 elems->ssid, elems->ssid_len);
2639 if (!bss)
2640 return;
2641 } else {
2642 #if 0
2643 /* TODO: order by RSSI? */
2644 spin_lock_bh(&local->sta_bss_lock);
2645 list_move_tail(&bss->list, &local->sta_bss_list);
2646 spin_unlock_bh(&local->sta_bss_lock);
2647 #endif
2648 }
2649
2650 /* save the ERP value so that it is available at association time */
2651 if (elems->erp_info && elems->erp_info_len >= 1) {
2652 bss->erp_value = elems->erp_info[0];
2653 bss->has_erp_value = 1;
2654 }
2655
2656 if (elems->ht_cap_elem &&
2657 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2658 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2659 kfree(bss->ht_ie);
2660 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2661 if (bss->ht_ie) {
2662 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2663 elems->ht_cap_elem_len + 2);
2664 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2665 } else
2666 bss->ht_ie_len = 0;
2667 } else if (!elems->ht_cap_elem && bss->ht_ie) {
2668 kfree(bss->ht_ie);
2669 bss->ht_ie = NULL;
2670 bss->ht_ie_len = 0;
2671 }
2672
2673 if (elems->ht_info_elem &&
2674 (!bss->ht_add_ie ||
2675 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2676 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2677 elems->ht_info_elem_len))) {
2678 kfree(bss->ht_add_ie);
2679 bss->ht_add_ie =
2680 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2681 if (bss->ht_add_ie) {
2682 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2683 elems->ht_info_elem_len + 2);
2684 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2685 } else
2686 bss->ht_add_ie_len = 0;
2687 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2688 kfree(bss->ht_add_ie);
2689 bss->ht_add_ie = NULL;
2690 bss->ht_add_ie_len = 0;
2691 }
2692
2693 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2694 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2695
2696 if (elems->tim) {
2697 struct ieee80211_tim_ie *tim_ie =
2698 (struct ieee80211_tim_ie *)elems->tim;
2699 bss->dtim_period = tim_ie->dtim_period;
2700 }
2701
2702 /* set default value for buggy APs */
2703 if (!elems->tim || bss->dtim_period == 0)
2704 bss->dtim_period = 1;
2705
2706 bss->supp_rates_len = 0;
2707 if (elems->supp_rates) {
2708 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2709 if (clen > elems->supp_rates_len)
2710 clen = elems->supp_rates_len;
2711 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2712 clen);
2713 bss->supp_rates_len += clen;
2714 }
2715 if (elems->ext_supp_rates) {
2716 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2717 if (clen > elems->ext_supp_rates_len)
2718 clen = elems->ext_supp_rates_len;
2719 memcpy(&bss->supp_rates[bss->supp_rates_len],
2720 elems->ext_supp_rates, clen);
2721 bss->supp_rates_len += clen;
2722 }
2723
2724 bss->band = rx_status->band;
2725
2726 bss->timestamp = beacon_timestamp;
2727 bss->last_update = jiffies;
2728 bss->signal = rx_status->signal;
2729 bss->noise = rx_status->noise;
2730 bss->qual = rx_status->qual;
2731 if (!beacon && !bss->probe_resp)
2732 bss->probe_resp = true;
2733
2734 /*
2735 * In STA mode, the remaining parameters should not be overridden
2736 * by beacons because they're not necessarily accurate there.
2737 */
2738 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2739 bss->probe_resp && beacon) {
2740 ieee80211_rx_bss_put(local, bss);
2741 return;
2742 }
2743
2744 if (elems->wpa &&
2745 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2746 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2747 kfree(bss->wpa_ie);
2748 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2749 if (bss->wpa_ie) {
2750 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2751 bss->wpa_ie_len = elems->wpa_len + 2;
2752 } else
2753 bss->wpa_ie_len = 0;
2754 } else if (!elems->wpa && bss->wpa_ie) {
2755 kfree(bss->wpa_ie);
2756 bss->wpa_ie = NULL;
2757 bss->wpa_ie_len = 0;
2758 }
2759
2760 if (elems->rsn &&
2761 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2762 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2763 kfree(bss->rsn_ie);
2764 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2765 if (bss->rsn_ie) {
2766 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2767 bss->rsn_ie_len = elems->rsn_len + 2;
2768 } else
2769 bss->rsn_ie_len = 0;
2770 } else if (!elems->rsn && bss->rsn_ie) {
2771 kfree(bss->rsn_ie);
2772 bss->rsn_ie = NULL;
2773 bss->rsn_ie_len = 0;
2774 }
2775
2776 /*
2777 * Cf.
2778 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2779 *
2780 * quoting:
2781 *
2782 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2783 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2784 * Alliance (September 1, 2004) is incorporated by reference herein.
2785 * The inclusion of the WMM Parameters in probe responses and
2786 * association responses is mandatory for WMM enabled networks. The
2787 * inclusion of the WMM Parameters in beacons, however, is optional.
2788 */
2789
2790 if (elems->wmm_param &&
2791 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2792 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2793 kfree(bss->wmm_ie);
2794 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2795 if (bss->wmm_ie) {
2796 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2797 elems->wmm_param_len + 2);
2798 bss->wmm_ie_len = elems->wmm_param_len + 2;
2799 } else
2800 bss->wmm_ie_len = 0;
2801 } else if (elems->wmm_info &&
2802 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2803 memcmp(bss->wmm_ie, elems->wmm_info,
2804 elems->wmm_info_len))) {
2805 /* As for certain AP's Fifth bit is not set in WMM IE in
2806 * beacon frames.So while parsing the beacon frame the
2807 * wmm_info structure is used instead of wmm_param.
2808 * wmm_info structure was never used to set bss->wmm_ie.
2809 * This code fixes this problem by copying the WME
2810 * information from wmm_info to bss->wmm_ie and enabling
2811 * n-band association.
2812 */
2813 kfree(bss->wmm_ie);
2814 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2815 if (bss->wmm_ie) {
2816 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2817 elems->wmm_info_len + 2);
2818 bss->wmm_ie_len = elems->wmm_info_len + 2;
2819 } else
2820 bss->wmm_ie_len = 0;
2821 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2822 kfree(bss->wmm_ie);
2823 bss->wmm_ie = NULL;
2824 bss->wmm_ie_len = 0;
2825 }
2826
2827 /* check if we need to merge IBSS */
2828 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2829 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2830 bss->capability & WLAN_CAPABILITY_IBSS &&
2831 bss->freq == local->oper_channel->center_freq &&
2832 elems->ssid_len == sdata->u.sta.ssid_len &&
2833 memcmp(elems->ssid, sdata->u.sta.ssid,
2834 sdata->u.sta.ssid_len) == 0) {
2835 if (rx_status->flag & RX_FLAG_TSFT) {
2836 /* in order for correct IBSS merging we need mactime
2837 *
2838 * since mactime is defined as the time the first data
2839 * symbol of the frame hits the PHY, and the timestamp
2840 * of the beacon is defined as "the time that the data
2841 * symbol containing the first bit of the timestamp is
2842 * transmitted to the PHY plus the transmitting STA’s
2843 * delays through its local PHY from the MAC-PHY
2844 * interface to its interface with the WM"
2845 * (802.11 11.1.2) - equals the time this bit arrives at
2846 * the receiver - we have to take into account the
2847 * offset between the two.
2848 * e.g: at 1 MBit that means mactime is 192 usec earlier
2849 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2850 */
2851 int rate = local->hw.wiphy->bands[rx_status->band]->
2852 bitrates[rx_status->rate_idx].bitrate;
2853 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2854 } else if (local && local->ops && local->ops->get_tsf)
2855 /* second best option: get current TSF */
2856 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2857 else
2858 /* can't merge without knowing the TSF */
2859 rx_timestamp = -1LLU;
2860 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2861 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2862 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2863 print_mac(mac, mgmt->sa),
2864 print_mac(mac2, mgmt->bssid),
2865 (unsigned long long)rx_timestamp,
2866 (unsigned long long)beacon_timestamp,
2867 (unsigned long long)(rx_timestamp - beacon_timestamp),
2868 jiffies);
2869 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2870 if (beacon_timestamp > rx_timestamp) {
2871 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2872 printk(KERN_DEBUG "%s: beacon TSF higher than "
2873 "local TSF - IBSS merge with BSSID %s\n",
2874 dev->name, print_mac(mac, mgmt->bssid));
2875 #endif
2876 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2877 ieee80211_ibss_add_sta(dev, NULL,
2878 mgmt->bssid, mgmt->sa,
2879 BIT(rx_status->rate_idx));
2880 }
2881 }
2882
2883 ieee80211_rx_bss_put(local, bss);
2884 }
2885
2886
2887 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2888 struct ieee80211_mgmt *mgmt,
2889 size_t len,
2890 struct ieee80211_rx_status *rx_status)
2891 {
2892 size_t baselen;
2893 struct ieee802_11_elems elems;
2894
2895 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2896 if (baselen > len)
2897 return;
2898
2899 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2900 &elems);
2901
2902 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2903 }
2904
2905
2906 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2907 struct ieee80211_mgmt *mgmt,
2908 size_t len,
2909 struct ieee80211_rx_status *rx_status)
2910 {
2911 struct ieee80211_sub_if_data *sdata;
2912 struct ieee80211_if_sta *ifsta;
2913 size_t baselen;
2914 struct ieee802_11_elems elems;
2915 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2916 struct ieee80211_conf *conf = &local->hw.conf;
2917 u32 changed = 0;
2918
2919 /* Process beacon from the current BSS */
2920 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2921 if (baselen > len)
2922 return;
2923
2924 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2925
2926 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2927
2928 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2929 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2930 return;
2931 ifsta = &sdata->u.sta;
2932
2933 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2934 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2935 return;
2936
2937 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2938 elems.wmm_param_len);
2939
2940 /* Do not send changes to driver if we are scanning. This removes
2941 * requirement that driver's bss_info_changed function needs to be
2942 * atomic. */
2943 if (local->sta_sw_scanning || local->sta_hw_scanning)
2944 return;
2945
2946 if (elems.erp_info && elems.erp_info_len >= 1)
2947 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2948 else {
2949 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2950 changed |= ieee80211_handle_protect_preamb(sdata, false,
2951 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2952 }
2953
2954 if (elems.ht_cap_elem && elems.ht_info_elem &&
2955 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2956 struct ieee80211_ht_bss_info bss_info;
2957
2958 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2959 (struct ieee80211_ht_addt_info *)
2960 elems.ht_info_elem, &bss_info);
2961 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2962 &bss_info);
2963 }
2964
2965 ieee80211_bss_info_change_notify(sdata, changed);
2966 }
2967
2968
2969 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2970 struct ieee80211_if_sta *ifsta,
2971 struct ieee80211_mgmt *mgmt,
2972 size_t len,
2973 struct ieee80211_rx_status *rx_status)
2974 {
2975 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2976 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2977 int tx_last_beacon;
2978 struct sk_buff *skb;
2979 struct ieee80211_mgmt *resp;
2980 u8 *pos, *end;
2981 DECLARE_MAC_BUF(mac);
2982 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2983 DECLARE_MAC_BUF(mac2);
2984 DECLARE_MAC_BUF(mac3);
2985 #endif
2986
2987 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2988 ifsta->state != IEEE80211_IBSS_JOINED ||
2989 len < 24 + 2 || !ifsta->probe_resp)
2990 return;
2991
2992 if (local->ops->tx_last_beacon)
2993 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2994 else
2995 tx_last_beacon = 1;
2996
2997 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2998 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2999 "%s (tx_last_beacon=%d)\n",
3000 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
3001 print_mac(mac3, mgmt->bssid), tx_last_beacon);
3002 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3003
3004 if (!tx_last_beacon)
3005 return;
3006
3007 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
3008 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
3009 return;
3010
3011 end = ((u8 *) mgmt) + len;
3012 pos = mgmt->u.probe_req.variable;
3013 if (pos[0] != WLAN_EID_SSID ||
3014 pos + 2 + pos[1] > end) {
3015 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3016 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3017 "from %s\n",
3018 dev->name, print_mac(mac, mgmt->sa));
3019 #endif
3020 return;
3021 }
3022 if (pos[1] != 0 &&
3023 (pos[1] != ifsta->ssid_len ||
3024 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3025 /* Ignore ProbeReq for foreign SSID */
3026 return;
3027 }
3028
3029 /* Reply with ProbeResp */
3030 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3031 if (!skb)
3032 return;
3033
3034 resp = (struct ieee80211_mgmt *) skb->data;
3035 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3036 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3037 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3038 dev->name, print_mac(mac, resp->da));
3039 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3040 ieee80211_sta_tx(dev, skb, 0);
3041 }
3042
3043 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3044 struct ieee80211_if_sta *ifsta,
3045 struct ieee80211_mgmt *mgmt,
3046 size_t len,
3047 struct ieee80211_rx_status *rx_status)
3048 {
3049 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3050 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3051
3052 if (len < IEEE80211_MIN_ACTION_SIZE)
3053 return;
3054
3055 switch (mgmt->u.action.category) {
3056 case WLAN_CATEGORY_SPECTRUM_MGMT:
3057 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3058 break;
3059 switch (mgmt->u.action.u.chan_switch.action_code) {
3060 case WLAN_ACTION_SPCT_MSR_REQ:
3061 if (len < (IEEE80211_MIN_ACTION_SIZE +
3062 sizeof(mgmt->u.action.u.measurement)))
3063 break;
3064 ieee80211_sta_process_measurement_req(dev, mgmt, len);
3065 break;
3066 }
3067 break;
3068 case WLAN_CATEGORY_BACK:
3069 switch (mgmt->u.action.u.addba_req.action_code) {
3070 case WLAN_ACTION_ADDBA_REQ:
3071 if (len < (IEEE80211_MIN_ACTION_SIZE +
3072 sizeof(mgmt->u.action.u.addba_req)))
3073 break;
3074 ieee80211_sta_process_addba_request(dev, mgmt, len);
3075 break;
3076 case WLAN_ACTION_ADDBA_RESP:
3077 if (len < (IEEE80211_MIN_ACTION_SIZE +
3078 sizeof(mgmt->u.action.u.addba_resp)))
3079 break;
3080 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3081 break;
3082 case WLAN_ACTION_DELBA:
3083 if (len < (IEEE80211_MIN_ACTION_SIZE +
3084 sizeof(mgmt->u.action.u.delba)))
3085 break;
3086 ieee80211_sta_process_delba(dev, mgmt, len);
3087 break;
3088 }
3089 break;
3090 case PLINK_CATEGORY:
3091 if (ieee80211_vif_is_mesh(&sdata->vif))
3092 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3093 break;
3094 case MESH_PATH_SEL_CATEGORY:
3095 if (ieee80211_vif_is_mesh(&sdata->vif))
3096 mesh_rx_path_sel_frame(dev, mgmt, len);
3097 break;
3098 }
3099 }
3100
3101 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3102 struct ieee80211_rx_status *rx_status)
3103 {
3104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3105 struct ieee80211_sub_if_data *sdata;
3106 struct ieee80211_if_sta *ifsta;
3107 struct ieee80211_mgmt *mgmt;
3108 u16 fc;
3109
3110 if (skb->len < 24)
3111 goto fail;
3112
3113 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3114 ifsta = &sdata->u.sta;
3115
3116 mgmt = (struct ieee80211_mgmt *) skb->data;
3117 fc = le16_to_cpu(mgmt->frame_control);
3118
3119 switch (fc & IEEE80211_FCTL_STYPE) {
3120 case IEEE80211_STYPE_PROBE_REQ:
3121 case IEEE80211_STYPE_PROBE_RESP:
3122 case IEEE80211_STYPE_BEACON:
3123 case IEEE80211_STYPE_ACTION:
3124 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3125 case IEEE80211_STYPE_AUTH:
3126 case IEEE80211_STYPE_ASSOC_RESP:
3127 case IEEE80211_STYPE_REASSOC_RESP:
3128 case IEEE80211_STYPE_DEAUTH:
3129 case IEEE80211_STYPE_DISASSOC:
3130 skb_queue_tail(&ifsta->skb_queue, skb);
3131 queue_work(local->hw.workqueue, &ifsta->work);
3132 return;
3133 }
3134
3135 fail:
3136 kfree_skb(skb);
3137 }
3138
3139
3140 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3141 struct sk_buff *skb)
3142 {
3143 struct ieee80211_rx_status *rx_status;
3144 struct ieee80211_sub_if_data *sdata;
3145 struct ieee80211_if_sta *ifsta;
3146 struct ieee80211_mgmt *mgmt;
3147 u16 fc;
3148
3149 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3150 ifsta = &sdata->u.sta;
3151
3152 rx_status = (struct ieee80211_rx_status *) skb->cb;
3153 mgmt = (struct ieee80211_mgmt *) skb->data;
3154 fc = le16_to_cpu(mgmt->frame_control);
3155
3156 switch (fc & IEEE80211_FCTL_STYPE) {
3157 case IEEE80211_STYPE_PROBE_REQ:
3158 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3159 rx_status);
3160 break;
3161 case IEEE80211_STYPE_PROBE_RESP:
3162 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3163 break;
3164 case IEEE80211_STYPE_BEACON:
3165 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3166 break;
3167 case IEEE80211_STYPE_AUTH:
3168 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3169 break;
3170 case IEEE80211_STYPE_ASSOC_RESP:
3171 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3172 break;
3173 case IEEE80211_STYPE_REASSOC_RESP:
3174 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3175 break;
3176 case IEEE80211_STYPE_DEAUTH:
3177 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3178 break;
3179 case IEEE80211_STYPE_DISASSOC:
3180 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3181 break;
3182 case IEEE80211_STYPE_ACTION:
3183 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3184 break;
3185 }
3186
3187 kfree_skb(skb);
3188 }
3189
3190
3191 ieee80211_rx_result
3192 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3193 struct ieee80211_rx_status *rx_status)
3194 {
3195 struct ieee80211_mgmt *mgmt;
3196 __le16 fc;
3197
3198 if (skb->len < 2)
3199 return RX_DROP_UNUSABLE;
3200
3201 mgmt = (struct ieee80211_mgmt *) skb->data;
3202 fc = mgmt->frame_control;
3203
3204 if (ieee80211_is_ctl(fc))
3205 return RX_CONTINUE;
3206
3207 if (skb->len < 24)
3208 return RX_DROP_MONITOR;
3209
3210 if (ieee80211_is_probe_resp(fc)) {
3211 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3212 dev_kfree_skb(skb);
3213 return RX_QUEUED;
3214 }
3215
3216 if (ieee80211_is_beacon(fc)) {
3217 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3218 dev_kfree_skb(skb);
3219 return RX_QUEUED;
3220 }
3221
3222 return RX_CONTINUE;
3223 }
3224
3225
3226 static int ieee80211_sta_active_ibss(struct net_device *dev)
3227 {
3228 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3229 int active = 0;
3230 struct sta_info *sta;
3231 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3232
3233 rcu_read_lock();
3234
3235 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3236 if (sta->sdata == sdata &&
3237 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3238 jiffies)) {
3239 active++;
3240 break;
3241 }
3242 }
3243
3244 rcu_read_unlock();
3245
3246 return active;
3247 }
3248
3249
3250 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3251 {
3252 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3253 struct sta_info *sta, *tmp;
3254 LIST_HEAD(tmp_list);
3255 DECLARE_MAC_BUF(mac);
3256 unsigned long flags;
3257
3258 spin_lock_irqsave(&local->sta_lock, flags);
3259 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3260 if (time_after(jiffies, sta->last_rx + exp_time)) {
3261 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3262 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3263 dev->name, print_mac(mac, sta->addr));
3264 #endif
3265 __sta_info_unlink(&sta);
3266 if (sta)
3267 list_add(&sta->list, &tmp_list);
3268 }
3269 spin_unlock_irqrestore(&local->sta_lock, flags);
3270
3271 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3272 sta_info_destroy(sta);
3273 }
3274
3275
3276 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3277 struct ieee80211_if_sta *ifsta)
3278 {
3279 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3280
3281 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3282 if (ieee80211_sta_active_ibss(dev))
3283 return;
3284
3285 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3286 "IBSS networks with same SSID (merge)\n", dev->name);
3287 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3288 }
3289
3290
3291 #ifdef CONFIG_MAC80211_MESH
3292 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3293 struct ieee80211_if_sta *ifsta)
3294 {
3295 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3296 bool free_plinks;
3297
3298 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3299 mesh_path_expire(dev);
3300
3301 free_plinks = mesh_plink_availables(sdata);
3302 if (free_plinks != sdata->u.sta.accepting_plinks)
3303 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3304
3305 mod_timer(&ifsta->timer, jiffies +
3306 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3307 }
3308
3309
3310 void ieee80211_start_mesh(struct net_device *dev)
3311 {
3312 struct ieee80211_if_sta *ifsta;
3313 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3314 ifsta = &sdata->u.sta;
3315 ifsta->state = IEEE80211_MESH_UP;
3316 ieee80211_sta_timer((unsigned long)sdata);
3317 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3318 }
3319 #endif
3320
3321
3322 void ieee80211_sta_timer(unsigned long data)
3323 {
3324 struct ieee80211_sub_if_data *sdata =
3325 (struct ieee80211_sub_if_data *) data;
3326 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3327 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3328
3329 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3330 queue_work(local->hw.workqueue, &ifsta->work);
3331 }
3332
3333 void ieee80211_sta_work(struct work_struct *work)
3334 {
3335 struct ieee80211_sub_if_data *sdata =
3336 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3337 struct net_device *dev = sdata->dev;
3338 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3339 struct ieee80211_if_sta *ifsta;
3340 struct sk_buff *skb;
3341
3342 if (!netif_running(dev))
3343 return;
3344
3345 if (local->sta_sw_scanning || local->sta_hw_scanning)
3346 return;
3347
3348 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3349 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3350 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3351 return;
3352 ifsta = &sdata->u.sta;
3353
3354 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3355 ieee80211_sta_rx_queued_mgmt(dev, skb);
3356
3357 #ifdef CONFIG_MAC80211_MESH
3358 if (ifsta->preq_queue_len &&
3359 time_after(jiffies,
3360 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3361 mesh_path_start_discovery(dev);
3362 #endif
3363
3364 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3365 ifsta->state != IEEE80211_ASSOCIATE &&
3366 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3367 if (ifsta->scan_ssid_len)
3368 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3369 else
3370 ieee80211_sta_start_scan(dev, NULL, 0);
3371 return;
3372 }
3373
3374 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3375 if (ieee80211_sta_config_auth(dev, ifsta))
3376 return;
3377 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3378 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3379 return;
3380
3381 switch (ifsta->state) {
3382 case IEEE80211_DISABLED:
3383 break;
3384 case IEEE80211_AUTHENTICATE:
3385 ieee80211_authenticate(dev, ifsta);
3386 break;
3387 case IEEE80211_ASSOCIATE:
3388 ieee80211_associate(dev, ifsta);
3389 break;
3390 case IEEE80211_ASSOCIATED:
3391 ieee80211_associated(dev, ifsta);
3392 break;
3393 case IEEE80211_IBSS_SEARCH:
3394 ieee80211_sta_find_ibss(dev, ifsta);
3395 break;
3396 case IEEE80211_IBSS_JOINED:
3397 ieee80211_sta_merge_ibss(dev, ifsta);
3398 break;
3399 #ifdef CONFIG_MAC80211_MESH
3400 case IEEE80211_MESH_UP:
3401 ieee80211_mesh_housekeeping(dev, ifsta);
3402 break;
3403 #endif
3404 default:
3405 WARN_ON(1);
3406 break;
3407 }
3408
3409 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3410 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3411 "mixed-cell disabled - disassociate\n", dev->name);
3412
3413 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3414 ieee80211_set_disassoc(dev, ifsta, 0);
3415 }
3416 }
3417
3418
3419 static void ieee80211_sta_reset_auth(struct net_device *dev,
3420 struct ieee80211_if_sta *ifsta)
3421 {
3422 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3423
3424 if (local->ops->reset_tsf) {
3425 /* Reset own TSF to allow time synchronization work. */
3426 local->ops->reset_tsf(local_to_hw(local));
3427 }
3428
3429 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3430
3431
3432 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3433 ifsta->auth_alg = WLAN_AUTH_OPEN;
3434 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3435 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3436 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3437 ifsta->auth_alg = WLAN_AUTH_LEAP;
3438 else
3439 ifsta->auth_alg = WLAN_AUTH_OPEN;
3440 ifsta->auth_transaction = -1;
3441 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3442 ifsta->auth_tries = ifsta->assoc_tries = 0;
3443 netif_carrier_off(dev);
3444 }
3445
3446
3447 void ieee80211_sta_req_auth(struct net_device *dev,
3448 struct ieee80211_if_sta *ifsta)
3449 {
3450 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3451 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3452
3453 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3454 return;
3455
3456 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3457 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3458 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3459 IEEE80211_STA_AUTO_SSID_SEL))) {
3460 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3461 queue_work(local->hw.workqueue, &ifsta->work);
3462 }
3463 }
3464
3465 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3466 const char *ssid, int ssid_len)
3467 {
3468 int tmp, hidden_ssid;
3469
3470 if (ssid_len == ifsta->ssid_len &&
3471 !memcmp(ifsta->ssid, ssid, ssid_len))
3472 return 1;
3473
3474 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3475 return 0;
3476
3477 hidden_ssid = 1;
3478 tmp = ssid_len;
3479 while (tmp--) {
3480 if (ssid[tmp] != '\0') {
3481 hidden_ssid = 0;
3482 break;
3483 }
3484 }
3485
3486 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3487 return 1;
3488
3489 if (ssid_len == 1 && ssid[0] == ' ')
3490 return 1;
3491
3492 return 0;
3493 }
3494
3495 static int ieee80211_sta_config_auth(struct net_device *dev,
3496 struct ieee80211_if_sta *ifsta)
3497 {
3498 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3499 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3500 struct ieee80211_sta_bss *bss, *selected = NULL;
3501 int top_rssi = 0, freq;
3502
3503 spin_lock_bh(&local->sta_bss_lock);
3504 freq = local->oper_channel->center_freq;
3505 list_for_each_entry(bss, &local->sta_bss_list, list) {
3506 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3507 continue;
3508
3509 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3510 IEEE80211_STA_AUTO_BSSID_SEL |
3511 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3512 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3513 !!sdata->default_key))
3514 continue;
3515
3516 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3517 bss->freq != freq)
3518 continue;
3519
3520 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3521 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3522 continue;
3523
3524 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3525 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3526 continue;
3527
3528 if (!selected || top_rssi < bss->signal) {
3529 selected = bss;
3530 top_rssi = bss->signal;
3531 }
3532 }
3533 if (selected)
3534 atomic_inc(&selected->users);
3535 spin_unlock_bh(&local->sta_bss_lock);
3536
3537 if (selected) {
3538 ieee80211_set_freq(dev, selected->freq);
3539 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3540 ieee80211_sta_set_ssid(dev, selected->ssid,
3541 selected->ssid_len);
3542 ieee80211_sta_set_bssid(dev, selected->bssid);
3543 ieee80211_sta_def_wmm_params(dev, selected, 0);
3544 ieee80211_rx_bss_put(local, selected);
3545 ifsta->state = IEEE80211_AUTHENTICATE;
3546 ieee80211_sta_reset_auth(dev, ifsta);
3547 return 0;
3548 } else {
3549 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3550 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3551 ieee80211_sta_start_scan(dev, NULL, 0);
3552 else
3553 ieee80211_sta_start_scan(dev, ifsta->ssid,
3554 ifsta->ssid_len);
3555 ifsta->state = IEEE80211_AUTHENTICATE;
3556 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3557 } else
3558 ifsta->state = IEEE80211_DISABLED;
3559 }
3560 return -1;
3561 }
3562
3563
3564 static int ieee80211_sta_create_ibss(struct net_device *dev,
3565 struct ieee80211_if_sta *ifsta)
3566 {
3567 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3568 struct ieee80211_sta_bss *bss;
3569 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3570 struct ieee80211_supported_band *sband;
3571 u8 bssid[ETH_ALEN], *pos;
3572 int i;
3573 int ret;
3574 DECLARE_MAC_BUF(mac);
3575
3576 #if 0
3577 /* Easier testing, use fixed BSSID. */
3578 memset(bssid, 0xfe, ETH_ALEN);
3579 #else
3580 /* Generate random, not broadcast, locally administered BSSID. Mix in
3581 * own MAC address to make sure that devices that do not have proper
3582 * random number generator get different BSSID. */
3583 get_random_bytes(bssid, ETH_ALEN);
3584 for (i = 0; i < ETH_ALEN; i++)
3585 bssid[i] ^= dev->dev_addr[i];
3586 bssid[0] &= ~0x01;
3587 bssid[0] |= 0x02;
3588 #endif
3589
3590 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3591 dev->name, print_mac(mac, bssid));
3592
3593 bss = ieee80211_rx_bss_add(dev, bssid,
3594 local->hw.conf.channel->center_freq,
3595 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3596 if (!bss)
3597 return -ENOMEM;
3598
3599 bss->band = local->hw.conf.channel->band;
3600 sband = local->hw.wiphy->bands[bss->band];
3601
3602 if (local->hw.conf.beacon_int == 0)
3603 local->hw.conf.beacon_int = 100;
3604 bss->beacon_int = local->hw.conf.beacon_int;
3605 bss->last_update = jiffies;
3606 bss->capability = WLAN_CAPABILITY_IBSS;
3607
3608 if (sdata->default_key)
3609 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3610 else
3611 sdata->drop_unencrypted = 0;
3612
3613 bss->supp_rates_len = sband->n_bitrates;
3614 pos = bss->supp_rates;
3615 for (i = 0; i < sband->n_bitrates; i++) {
3616 int rate = sband->bitrates[i].bitrate;
3617 *pos++ = (u8) (rate / 5);
3618 }
3619
3620 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3621 ieee80211_rx_bss_put(local, bss);
3622 return ret;
3623 }
3624
3625
3626 static int ieee80211_sta_find_ibss(struct net_device *dev,
3627 struct ieee80211_if_sta *ifsta)
3628 {
3629 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3630 struct ieee80211_sta_bss *bss;
3631 int found = 0;
3632 u8 bssid[ETH_ALEN];
3633 int active_ibss;
3634 DECLARE_MAC_BUF(mac);
3635 DECLARE_MAC_BUF(mac2);
3636
3637 if (ifsta->ssid_len == 0)
3638 return -EINVAL;
3639
3640 active_ibss = ieee80211_sta_active_ibss(dev);
3641 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3642 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3643 dev->name, active_ibss);
3644 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3645 spin_lock_bh(&local->sta_bss_lock);
3646 list_for_each_entry(bss, &local->sta_bss_list, list) {
3647 if (ifsta->ssid_len != bss->ssid_len ||
3648 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3649 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3650 continue;
3651 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3652 printk(KERN_DEBUG " bssid=%s found\n",
3653 print_mac(mac, bss->bssid));
3654 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3655 memcpy(bssid, bss->bssid, ETH_ALEN);
3656 found = 1;
3657 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3658 break;
3659 }
3660 spin_unlock_bh(&local->sta_bss_lock);
3661
3662 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3663 if (found)
3664 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3665 "%s\n", print_mac(mac, bssid),
3666 print_mac(mac2, ifsta->bssid));
3667 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3668
3669 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3670 int ret;
3671 int search_freq;
3672
3673 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3674 search_freq = bss->freq;
3675 else
3676 search_freq = local->hw.conf.channel->center_freq;
3677
3678 bss = ieee80211_rx_bss_get(dev, bssid, search_freq,
3679 ifsta->ssid, ifsta->ssid_len);
3680 if (!bss)
3681 goto dont_join;
3682
3683 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3684 " based on configured SSID\n",
3685 dev->name, print_mac(mac, bssid));
3686 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3687 ieee80211_rx_bss_put(local, bss);
3688 return ret;
3689 }
3690
3691 dont_join:
3692 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3693 printk(KERN_DEBUG " did not try to join ibss\n");
3694 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3695
3696 /* Selected IBSS not found in current scan results - try to scan */
3697 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3698 !ieee80211_sta_active_ibss(dev)) {
3699 mod_timer(&ifsta->timer, jiffies +
3700 IEEE80211_IBSS_MERGE_INTERVAL);
3701 } else if (time_after(jiffies, local->last_scan_completed +
3702 IEEE80211_SCAN_INTERVAL)) {
3703 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3704 "join\n", dev->name);
3705 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3706 ifsta->ssid_len);
3707 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3708 int interval = IEEE80211_SCAN_INTERVAL;
3709
3710 if (time_after(jiffies, ifsta->ibss_join_req +
3711 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3712 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3713 (!(local->oper_channel->flags &
3714 IEEE80211_CHAN_NO_IBSS)))
3715 return ieee80211_sta_create_ibss(dev, ifsta);
3716 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3717 printk(KERN_DEBUG "%s: IBSS not allowed on"
3718 " %d MHz\n", dev->name,
3719 local->hw.conf.channel->center_freq);
3720 }
3721
3722 /* No IBSS found - decrease scan interval and continue
3723 * scanning. */
3724 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3725 }
3726
3727 ifsta->state = IEEE80211_IBSS_SEARCH;
3728 mod_timer(&ifsta->timer, jiffies + interval);
3729 return 0;
3730 }
3731
3732 return 0;
3733 }
3734
3735
3736 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3737 {
3738 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3739 struct ieee80211_if_sta *ifsta;
3740 int res;
3741
3742 if (len > IEEE80211_MAX_SSID_LEN)
3743 return -EINVAL;
3744
3745 ifsta = &sdata->u.sta;
3746
3747 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3748 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3749 memcpy(ifsta->ssid, ssid, len);
3750 ifsta->ssid_len = len;
3751 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3752
3753 res = 0;
3754 /*
3755 * Hack! MLME code needs to be cleaned up to have different
3756 * entry points for configuration and internal selection change
3757 */
3758 if (netif_running(sdata->dev))
3759 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3760 if (res) {
3761 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3762 "the low-level driver\n", dev->name);
3763 return res;
3764 }
3765 }
3766
3767 if (len)
3768 ifsta->flags |= IEEE80211_STA_SSID_SET;
3769 else
3770 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3771
3772 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3773 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3774 ifsta->ibss_join_req = jiffies;
3775 ifsta->state = IEEE80211_IBSS_SEARCH;
3776 return ieee80211_sta_find_ibss(dev, ifsta);
3777 }
3778
3779 return 0;
3780 }
3781
3782
3783 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3784 {
3785 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3786 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3787 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3788 *len = ifsta->ssid_len;
3789 return 0;
3790 }
3791
3792
3793 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3794 {
3795 struct ieee80211_sub_if_data *sdata;
3796 struct ieee80211_if_sta *ifsta;
3797 int res;
3798
3799 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3800 ifsta = &sdata->u.sta;
3801
3802 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3803 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3804 res = 0;
3805 /*
3806 * Hack! See also ieee80211_sta_set_ssid.
3807 */
3808 if (netif_running(sdata->dev))
3809 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3810 if (res) {
3811 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3812 "the low-level driver\n", dev->name);
3813 return res;
3814 }
3815 }
3816
3817 if (is_valid_ether_addr(bssid))
3818 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3819 else
3820 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3821
3822 return 0;
3823 }
3824
3825
3826 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3827 struct ieee80211_sub_if_data *sdata,
3828 int powersave)
3829 {
3830 struct sk_buff *skb;
3831 struct ieee80211_hdr *nullfunc;
3832 __le16 fc;
3833
3834 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3835 if (!skb) {
3836 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3837 "frame\n", sdata->dev->name);
3838 return;
3839 }
3840 skb_reserve(skb, local->hw.extra_tx_headroom);
3841
3842 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3843 memset(nullfunc, 0, 24);
3844 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3845 IEEE80211_FCTL_TODS);
3846 if (powersave)
3847 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3848 nullfunc->frame_control = fc;
3849 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3850 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3851 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3852
3853 ieee80211_sta_tx(sdata->dev, skb, 0);
3854 }
3855
3856
3857 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3858 {
3859 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3860 ieee80211_vif_is_mesh(&sdata->vif))
3861 ieee80211_sta_timer((unsigned long)sdata);
3862 }
3863
3864 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3865 {
3866 struct ieee80211_local *local = hw_to_local(hw);
3867 struct net_device *dev = local->scan_dev;
3868 struct ieee80211_sub_if_data *sdata;
3869 union iwreq_data wrqu;
3870
3871 local->last_scan_completed = jiffies;
3872 memset(&wrqu, 0, sizeof(wrqu));
3873 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3874
3875 if (local->sta_hw_scanning) {
3876 local->sta_hw_scanning = 0;
3877 if (ieee80211_hw_config(local))
3878 printk(KERN_DEBUG "%s: failed to restore operational "
3879 "channel after scan\n", dev->name);
3880 /* Restart STA timer for HW scan case */
3881 rcu_read_lock();
3882 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3883 ieee80211_restart_sta_timer(sdata);
3884 rcu_read_unlock();
3885
3886 goto done;
3887 }
3888
3889 local->sta_sw_scanning = 0;
3890 if (ieee80211_hw_config(local))
3891 printk(KERN_DEBUG "%s: failed to restore operational "
3892 "channel after scan\n", dev->name);
3893
3894
3895 netif_tx_lock_bh(local->mdev);
3896 netif_addr_lock(local->mdev);
3897 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3898 local->ops->configure_filter(local_to_hw(local),
3899 FIF_BCN_PRBRESP_PROMISC,
3900 &local->filter_flags,
3901 local->mdev->mc_count,
3902 local->mdev->mc_list);
3903
3904 netif_addr_unlock(local->mdev);
3905 netif_tx_unlock_bh(local->mdev);
3906
3907 rcu_read_lock();
3908 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3909 /* Tell AP we're back */
3910 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3911 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3912 ieee80211_send_nullfunc(local, sdata, 0);
3913
3914 ieee80211_restart_sta_timer(sdata);
3915
3916 netif_wake_queue(sdata->dev);
3917 }
3918 rcu_read_unlock();
3919
3920 done:
3921 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3922 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3923 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3924 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3925 (!(ifsta->state == IEEE80211_IBSS_JOINED) &&
3926 !ieee80211_sta_active_ibss(dev)))
3927 ieee80211_sta_find_ibss(dev, ifsta);
3928 }
3929 }
3930 EXPORT_SYMBOL(ieee80211_scan_completed);
3931
3932 void ieee80211_sta_scan_work(struct work_struct *work)
3933 {
3934 struct ieee80211_local *local =
3935 container_of(work, struct ieee80211_local, scan_work.work);
3936 struct net_device *dev = local->scan_dev;
3937 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3938 struct ieee80211_supported_band *sband;
3939 struct ieee80211_channel *chan;
3940 int skip;
3941 unsigned long next_delay = 0;
3942
3943 if (!local->sta_sw_scanning)
3944 return;
3945
3946 switch (local->scan_state) {
3947 case SCAN_SET_CHANNEL:
3948 /*
3949 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3950 * after we successfully scanned the last channel of the last
3951 * band (and the last band is supported by the hw)
3952 */
3953 if (local->scan_band < IEEE80211_NUM_BANDS)
3954 sband = local->hw.wiphy->bands[local->scan_band];
3955 else
3956 sband = NULL;
3957
3958 /*
3959 * If we are at an unsupported band and have more bands
3960 * left to scan, advance to the next supported one.
3961 */
3962 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3963 local->scan_band++;
3964 sband = local->hw.wiphy->bands[local->scan_band];
3965 local->scan_channel_idx = 0;
3966 }
3967
3968 /* if no more bands/channels left, complete scan */
3969 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3970 ieee80211_scan_completed(local_to_hw(local));
3971 return;
3972 }
3973 skip = 0;
3974 chan = &sband->channels[local->scan_channel_idx];
3975
3976 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3977 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3978 chan->flags & IEEE80211_CHAN_NO_IBSS))
3979 skip = 1;
3980
3981 if (!skip) {
3982 local->scan_channel = chan;
3983 if (ieee80211_hw_config(local)) {
3984 printk(KERN_DEBUG "%s: failed to set freq to "
3985 "%d MHz for scan\n", dev->name,
3986 chan->center_freq);
3987 skip = 1;
3988 }
3989 }
3990
3991 /* advance state machine to next channel/band */
3992 local->scan_channel_idx++;
3993 if (local->scan_channel_idx >= sband->n_channels) {
3994 /*
3995 * scan_band may end up == IEEE80211_NUM_BANDS, but
3996 * we'll catch that case above and complete the scan
3997 * if that is the case.
3998 */
3999 local->scan_band++;
4000 local->scan_channel_idx = 0;
4001 }
4002
4003 if (skip)
4004 break;
4005
4006 next_delay = IEEE80211_PROBE_DELAY +
4007 usecs_to_jiffies(local->hw.channel_change_time);
4008 local->scan_state = SCAN_SEND_PROBE;
4009 break;
4010 case SCAN_SEND_PROBE:
4011 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
4012 local->scan_state = SCAN_SET_CHANNEL;
4013
4014 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
4015 break;
4016 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
4017 local->scan_ssid_len);
4018 next_delay = IEEE80211_CHANNEL_TIME;
4019 break;
4020 }
4021
4022 if (local->sta_sw_scanning)
4023 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4024 next_delay);
4025 }
4026
4027
4028 static int ieee80211_sta_start_scan(struct net_device *dev,
4029 u8 *ssid, size_t ssid_len)
4030 {
4031 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4032 struct ieee80211_sub_if_data *sdata;
4033
4034 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4035 return -EINVAL;
4036
4037 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4038 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4039 * BSSID: MACAddress
4040 * SSID
4041 * ScanType: ACTIVE, PASSIVE
4042 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4043 * a Probe frame during active scanning
4044 * ChannelList
4045 * MinChannelTime (>= ProbeDelay), in TU
4046 * MaxChannelTime: (>= MinChannelTime), in TU
4047 */
4048
4049 /* MLME-SCAN.confirm
4050 * BSSDescriptionSet
4051 * ResultCode: SUCCESS, INVALID_PARAMETERS
4052 */
4053
4054 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4055 if (local->scan_dev == dev)
4056 return 0;
4057 return -EBUSY;
4058 }
4059
4060 if (local->ops->hw_scan) {
4061 int rc = local->ops->hw_scan(local_to_hw(local),
4062 ssid, ssid_len);
4063 if (!rc) {
4064 local->sta_hw_scanning = 1;
4065 local->scan_dev = dev;
4066 }
4067 return rc;
4068 }
4069
4070 local->sta_sw_scanning = 1;
4071
4072 rcu_read_lock();
4073 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4074 netif_stop_queue(sdata->dev);
4075 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4076 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4077 ieee80211_send_nullfunc(local, sdata, 1);
4078 }
4079 rcu_read_unlock();
4080
4081 if (ssid) {
4082 local->scan_ssid_len = ssid_len;
4083 memcpy(local->scan_ssid, ssid, ssid_len);
4084 } else
4085 local->scan_ssid_len = 0;
4086 local->scan_state = SCAN_SET_CHANNEL;
4087 local->scan_channel_idx = 0;
4088 local->scan_band = IEEE80211_BAND_2GHZ;
4089 local->scan_dev = dev;
4090
4091 netif_addr_lock_bh(local->mdev);
4092 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4093 local->ops->configure_filter(local_to_hw(local),
4094 FIF_BCN_PRBRESP_PROMISC,
4095 &local->filter_flags,
4096 local->mdev->mc_count,
4097 local->mdev->mc_list);
4098 netif_addr_unlock_bh(local->mdev);
4099
4100 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4101 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4102 IEEE80211_CHANNEL_TIME);
4103
4104 return 0;
4105 }
4106
4107
4108 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4109 {
4110 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4111 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4112 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4113
4114 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4115 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4116
4117 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4118 if (local->scan_dev == dev)
4119 return 0;
4120 return -EBUSY;
4121 }
4122
4123 ifsta->scan_ssid_len = ssid_len;
4124 if (ssid_len)
4125 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4126 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4127 queue_work(local->hw.workqueue, &ifsta->work);
4128 return 0;
4129 }
4130
4131 static char *
4132 ieee80211_sta_scan_result(struct net_device *dev,
4133 struct iw_request_info *info,
4134 struct ieee80211_sta_bss *bss,
4135 char *current_ev, char *end_buf)
4136 {
4137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4138 struct iw_event iwe;
4139
4140 if (time_after(jiffies,
4141 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4142 return current_ev;
4143
4144 memset(&iwe, 0, sizeof(iwe));
4145 iwe.cmd = SIOCGIWAP;
4146 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4147 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4148 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4149 IW_EV_ADDR_LEN);
4150
4151 memset(&iwe, 0, sizeof(iwe));
4152 iwe.cmd = SIOCGIWESSID;
4153 if (bss_mesh_cfg(bss)) {
4154 iwe.u.data.length = bss_mesh_id_len(bss);
4155 iwe.u.data.flags = 1;
4156 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4157 &iwe, bss_mesh_id(bss));
4158 } else {
4159 iwe.u.data.length = bss->ssid_len;
4160 iwe.u.data.flags = 1;
4161 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4162 &iwe, bss->ssid);
4163 }
4164
4165 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4166 || bss_mesh_cfg(bss)) {
4167 memset(&iwe, 0, sizeof(iwe));
4168 iwe.cmd = SIOCGIWMODE;
4169 if (bss_mesh_cfg(bss))
4170 iwe.u.mode = IW_MODE_MESH;
4171 else if (bss->capability & WLAN_CAPABILITY_ESS)
4172 iwe.u.mode = IW_MODE_MASTER;
4173 else
4174 iwe.u.mode = IW_MODE_ADHOC;
4175 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4176 &iwe, IW_EV_UINT_LEN);
4177 }
4178
4179 memset(&iwe, 0, sizeof(iwe));
4180 iwe.cmd = SIOCGIWFREQ;
4181 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4182 iwe.u.freq.e = 0;
4183 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4184 IW_EV_FREQ_LEN);
4185
4186 memset(&iwe, 0, sizeof(iwe));
4187 iwe.cmd = SIOCGIWFREQ;
4188 iwe.u.freq.m = bss->freq;
4189 iwe.u.freq.e = 6;
4190 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4191 IW_EV_FREQ_LEN);
4192 memset(&iwe, 0, sizeof(iwe));
4193 iwe.cmd = IWEVQUAL;
4194 iwe.u.qual.qual = bss->qual;
4195 iwe.u.qual.level = bss->signal;
4196 iwe.u.qual.noise = bss->noise;
4197 iwe.u.qual.updated = local->wstats_flags;
4198 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4199 IW_EV_QUAL_LEN);
4200
4201 memset(&iwe, 0, sizeof(iwe));
4202 iwe.cmd = SIOCGIWENCODE;
4203 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4204 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4205 else
4206 iwe.u.data.flags = IW_ENCODE_DISABLED;
4207 iwe.u.data.length = 0;
4208 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4209 &iwe, "");
4210
4211 if (bss && bss->wpa_ie) {
4212 memset(&iwe, 0, sizeof(iwe));
4213 iwe.cmd = IWEVGENIE;
4214 iwe.u.data.length = bss->wpa_ie_len;
4215 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4216 &iwe, bss->wpa_ie);
4217 }
4218
4219 if (bss && bss->rsn_ie) {
4220 memset(&iwe, 0, sizeof(iwe));
4221 iwe.cmd = IWEVGENIE;
4222 iwe.u.data.length = bss->rsn_ie_len;
4223 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4224 &iwe, bss->rsn_ie);
4225 }
4226
4227 if (bss && bss->ht_ie) {
4228 memset(&iwe, 0, sizeof(iwe));
4229 iwe.cmd = IWEVGENIE;
4230 iwe.u.data.length = bss->ht_ie_len;
4231 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4232 &iwe, bss->ht_ie);
4233 }
4234
4235 if (bss && bss->supp_rates_len > 0) {
4236 /* display all supported rates in readable format */
4237 char *p = current_ev + iwe_stream_lcp_len(info);
4238 int i;
4239
4240 memset(&iwe, 0, sizeof(iwe));
4241 iwe.cmd = SIOCGIWRATE;
4242 /* Those two flags are ignored... */
4243 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4244
4245 for (i = 0; i < bss->supp_rates_len; i++) {
4246 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4247 0x7f) * 500000);
4248 p = iwe_stream_add_value(info, current_ev, p,
4249 end_buf, &iwe, IW_EV_PARAM_LEN);
4250 }
4251 current_ev = p;
4252 }
4253
4254 if (bss) {
4255 char *buf;
4256 buf = kmalloc(30, GFP_ATOMIC);
4257 if (buf) {
4258 memset(&iwe, 0, sizeof(iwe));
4259 iwe.cmd = IWEVCUSTOM;
4260 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4261 iwe.u.data.length = strlen(buf);
4262 current_ev = iwe_stream_add_point(info, current_ev,
4263 end_buf,
4264 &iwe, buf);
4265 memset(&iwe, 0, sizeof(iwe));
4266 iwe.cmd = IWEVCUSTOM;
4267 sprintf(buf, " Last beacon: %dms ago",
4268 jiffies_to_msecs(jiffies - bss->last_update));
4269 iwe.u.data.length = strlen(buf);
4270 current_ev = iwe_stream_add_point(info, current_ev,
4271 end_buf, &iwe, buf);
4272 kfree(buf);
4273 }
4274 }
4275
4276 if (bss_mesh_cfg(bss)) {
4277 char *buf;
4278 u8 *cfg = bss_mesh_cfg(bss);
4279 buf = kmalloc(50, GFP_ATOMIC);
4280 if (buf) {
4281 memset(&iwe, 0, sizeof(iwe));
4282 iwe.cmd = IWEVCUSTOM;
4283 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4284 iwe.u.data.length = strlen(buf);
4285 current_ev = iwe_stream_add_point(info, current_ev,
4286 end_buf,
4287 &iwe, buf);
4288 sprintf(buf, "Path Selection Protocol ID: "
4289 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4290 cfg[4]);
4291 iwe.u.data.length = strlen(buf);
4292 current_ev = iwe_stream_add_point(info, current_ev,
4293 end_buf,
4294 &iwe, buf);
4295 sprintf(buf, "Path Selection Metric ID: "
4296 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4297 cfg[8]);
4298 iwe.u.data.length = strlen(buf);
4299 current_ev = iwe_stream_add_point(info, current_ev,
4300 end_buf,
4301 &iwe, buf);
4302 sprintf(buf, "Congestion Control Mode ID: "
4303 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4304 cfg[11], cfg[12]);
4305 iwe.u.data.length = strlen(buf);
4306 current_ev = iwe_stream_add_point(info, current_ev,
4307 end_buf,
4308 &iwe, buf);
4309 sprintf(buf, "Channel Precedence: "
4310 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4311 cfg[15], cfg[16]);
4312 iwe.u.data.length = strlen(buf);
4313 current_ev = iwe_stream_add_point(info, current_ev,
4314 end_buf,
4315 &iwe, buf);
4316 kfree(buf);
4317 }
4318 }
4319
4320 return current_ev;
4321 }
4322
4323
4324 int ieee80211_sta_scan_results(struct net_device *dev,
4325 struct iw_request_info *info,
4326 char *buf, size_t len)
4327 {
4328 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4329 char *current_ev = buf;
4330 char *end_buf = buf + len;
4331 struct ieee80211_sta_bss *bss;
4332
4333 spin_lock_bh(&local->sta_bss_lock);
4334 list_for_each_entry(bss, &local->sta_bss_list, list) {
4335 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4336 spin_unlock_bh(&local->sta_bss_lock);
4337 return -E2BIG;
4338 }
4339 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4340 current_ev, end_buf);
4341 }
4342 spin_unlock_bh(&local->sta_bss_lock);
4343 return current_ev - buf;
4344 }
4345
4346
4347 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4348 {
4349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4350 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4351
4352 kfree(ifsta->extra_ie);
4353 if (len == 0) {
4354 ifsta->extra_ie = NULL;
4355 ifsta->extra_ie_len = 0;
4356 return 0;
4357 }
4358 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4359 if (!ifsta->extra_ie) {
4360 ifsta->extra_ie_len = 0;
4361 return -ENOMEM;
4362 }
4363 memcpy(ifsta->extra_ie, ie, len);
4364 ifsta->extra_ie_len = len;
4365 return 0;
4366 }
4367
4368
4369 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4370 struct sk_buff *skb, u8 *bssid,
4371 u8 *addr, u64 supp_rates)
4372 {
4373 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4374 struct sta_info *sta;
4375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4376 DECLARE_MAC_BUF(mac);
4377 int band = local->hw.conf.channel->band;
4378
4379 /* TODO: Could consider removing the least recently used entry and
4380 * allow new one to be added. */
4381 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4382 if (net_ratelimit()) {
4383 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4384 "entry %s\n", dev->name, print_mac(mac, addr));
4385 }
4386 return NULL;
4387 }
4388
4389 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4390 return NULL;
4391
4392 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4393 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4394 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4395 #endif
4396
4397 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4398 if (!sta)
4399 return NULL;
4400
4401 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4402
4403 if (supp_rates)
4404 sta->supp_rates[band] = supp_rates;
4405 else
4406 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4407
4408 rate_control_rate_init(sta, local);
4409
4410 if (sta_info_insert(sta))
4411 return NULL;
4412
4413 return sta;
4414 }
4415
4416
4417 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4418 {
4419 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4420 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4421
4422 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4423 dev->name, reason);
4424
4425 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4426 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4427 return -EINVAL;
4428
4429 ieee80211_send_deauth(dev, ifsta, reason);
4430 ieee80211_set_disassoc(dev, ifsta, 1);
4431 return 0;
4432 }
4433
4434
4435 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4436 {
4437 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4438 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4439
4440 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4441 dev->name, reason);
4442
4443 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4444 return -EINVAL;
4445
4446 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4447 return -1;
4448
4449 ieee80211_send_disassoc(dev, ifsta, reason);
4450 ieee80211_set_disassoc(dev, ifsta, 0);
4451 return 0;
4452 }
4453
4454 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4455 enum ieee80211_notification_types notif_type)
4456 {
4457 struct ieee80211_local *local = hw_to_local(hw);
4458 struct ieee80211_sub_if_data *sdata;
4459
4460 switch (notif_type) {
4461 case IEEE80211_NOTIFY_RE_ASSOC:
4462 rcu_read_lock();
4463 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4464 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4465 continue;
4466
4467 ieee80211_sta_req_auth(sdata->dev, &sdata->u.sta);
4468 }
4469 rcu_read_unlock();
4470 break;
4471 }
4472 }
4473 EXPORT_SYMBOL(ieee80211_notify_mac);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree