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tty-usb-mct-u232: Coding style
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / mlme.c
blobd7c371e36bf0d5cb3d9d4d35898ec32eda2c31d8
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
555 changed |= ieee80211_handle_bss_capability(sdata, bss);
556
557 ieee80211_rx_bss_put(local, bss);
558 }
559
560 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
561 changed |= BSS_CHANGED_HT;
562 sdata->bss_conf.assoc_ht = 1;
563 sdata->bss_conf.ht_conf = &conf->ht_conf;
564 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
565 }
566
567 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
568 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
569 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
570 ieee80211_sta_send_associnfo(dev, ifsta);
571 } else {
572 netif_carrier_off(dev);
573 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
574 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
575 changed |= ieee80211_reset_erp_info(dev);
576
577 sdata->bss_conf.assoc_ht = 0;
578 sdata->bss_conf.ht_conf = NULL;
579 sdata->bss_conf.ht_bss_conf = NULL;
580
581 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
582 }
583 ifsta->last_probe = jiffies;
584 ieee80211_led_assoc(local, assoc);
585
586 sdata->bss_conf.assoc = assoc;
587 ieee80211_bss_info_change_notify(sdata, changed);
588
589 if (assoc)
590 netif_carrier_on(dev);
591
592 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
593 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
594 }
595
596 static void ieee80211_set_disassoc(struct net_device *dev,
597 struct ieee80211_if_sta *ifsta, int deauth)
598 {
599 if (deauth)
600 ifsta->auth_tries = 0;
601 ifsta->assoc_tries = 0;
602 ieee80211_set_associated(dev, ifsta, 0);
603 }
604
605 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
606 int encrypt)
607 {
608 struct ieee80211_sub_if_data *sdata;
609 struct ieee80211_tx_info *info;
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 info = IEEE80211_SKB_CB(skb);
618 memset(info, 0, sizeof(struct ieee80211_tx_info));
619 info->control.ifindex = sdata->dev->ifindex;
620 if (!encrypt)
621 info->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT;
622
623 dev_queue_xmit(skb);
624 }
625
626
627 static void ieee80211_send_auth(struct net_device *dev,
628 struct ieee80211_if_sta *ifsta,
629 int transaction, u8 *extra, size_t extra_len,
630 int encrypt)
631 {
632 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
633 struct sk_buff *skb;
634 struct ieee80211_mgmt *mgmt;
635
636 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
637 sizeof(*mgmt) + 6 + extra_len);
638 if (!skb) {
639 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
640 "frame\n", dev->name);
641 return;
642 }
643 skb_reserve(skb, local->hw.extra_tx_headroom);
644
645 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
646 memset(mgmt, 0, 24 + 6);
647 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
648 IEEE80211_STYPE_AUTH);
649 if (encrypt)
650 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
651 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
652 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
653 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
654 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
655 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
656 ifsta->auth_transaction = transaction + 1;
657 mgmt->u.auth.status_code = cpu_to_le16(0);
658 if (extra)
659 memcpy(skb_put(skb, extra_len), extra, extra_len);
660
661 ieee80211_sta_tx(dev, skb, encrypt);
662 }
663
664
665 static void ieee80211_authenticate(struct net_device *dev,
666 struct ieee80211_if_sta *ifsta)
667 {
668 DECLARE_MAC_BUF(mac);
669
670 ifsta->auth_tries++;
671 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
672 printk(KERN_DEBUG "%s: authentication with AP %s"
673 " timed out\n",
674 dev->name, print_mac(mac, ifsta->bssid));
675 ifsta->state = IEEE80211_DISABLED;
676 return;
677 }
678
679 ifsta->state = IEEE80211_AUTHENTICATE;
680 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
681 dev->name, print_mac(mac, ifsta->bssid));
682
683 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
684
685 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
686 }
687
688 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
689 struct ieee80211_supported_band *sband,
690 u64 *rates)
691 {
692 int i, j, count;
693 *rates = 0;
694 count = 0;
695 for (i = 0; i < bss->supp_rates_len; i++) {
696 int rate = (bss->supp_rates[i] & 0x7F) * 5;
697
698 for (j = 0; j < sband->n_bitrates; j++)
699 if (sband->bitrates[j].bitrate == rate) {
700 *rates |= BIT(j);
701 count++;
702 break;
703 }
704 }
705
706 return count;
707 }
708
709 static void ieee80211_send_assoc(struct net_device *dev,
710 struct ieee80211_if_sta *ifsta)
711 {
712 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
713 struct sk_buff *skb;
714 struct ieee80211_mgmt *mgmt;
715 u8 *pos, *ies;
716 int i, len, count, rates_len, supp_rates_len;
717 u16 capab;
718 struct ieee80211_sta_bss *bss;
719 int wmm = 0;
720 struct ieee80211_supported_band *sband;
721 u64 rates = 0;
722
723 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
724 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
725 ifsta->ssid_len);
726 if (!skb) {
727 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
728 "frame\n", dev->name);
729 return;
730 }
731 skb_reserve(skb, local->hw.extra_tx_headroom);
732
733 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
734
735 capab = ifsta->capab;
736
737 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
738 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
739 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
740 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
741 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
742 }
743
744 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
745 local->hw.conf.channel->center_freq,
746 ifsta->ssid, ifsta->ssid_len);
747 if (bss) {
748 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
749 capab |= WLAN_CAPABILITY_PRIVACY;
750 if (bss->wmm_ie)
751 wmm = 1;
752
753 /* get all rates supported by the device and the AP as
754 * some APs don't like getting a superset of their rates
755 * in the association request (e.g. D-Link DAP 1353 in
756 * b-only mode) */
757 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
758
759 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
760 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
761 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
762
763 ieee80211_rx_bss_put(local, bss);
764 } else {
765 rates = ~0;
766 rates_len = sband->n_bitrates;
767 }
768
769 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
770 memset(mgmt, 0, 24);
771 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
772 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
773 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
774
775 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
776 skb_put(skb, 10);
777 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
778 IEEE80211_STYPE_REASSOC_REQ);
779 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
780 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
781 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
782 ETH_ALEN);
783 } else {
784 skb_put(skb, 4);
785 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
786 IEEE80211_STYPE_ASSOC_REQ);
787 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
788 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
789 }
790
791 /* SSID */
792 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
793 *pos++ = WLAN_EID_SSID;
794 *pos++ = ifsta->ssid_len;
795 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
796
797 /* add all rates which were marked to be used above */
798 supp_rates_len = rates_len;
799 if (supp_rates_len > 8)
800 supp_rates_len = 8;
801
802 len = sband->n_bitrates;
803 pos = skb_put(skb, supp_rates_len + 2);
804 *pos++ = WLAN_EID_SUPP_RATES;
805 *pos++ = supp_rates_len;
806
807 count = 0;
808 for (i = 0; i < sband->n_bitrates; i++) {
809 if (BIT(i) & rates) {
810 int rate = sband->bitrates[i].bitrate;
811 *pos++ = (u8) (rate / 5);
812 if (++count == 8)
813 break;
814 }
815 }
816
817 if (count == 8) {
818 pos = skb_put(skb, rates_len - count + 2);
819 *pos++ = WLAN_EID_EXT_SUPP_RATES;
820 *pos++ = rates_len - count;
821
822 for (i++; i < sband->n_bitrates; i++) {
823 if (BIT(i) & rates) {
824 int rate = sband->bitrates[i].bitrate;
825 *pos++ = (u8) (rate / 5);
826 }
827 }
828 }
829
830 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
831 /* 1. power capabilities */
832 pos = skb_put(skb, 4);
833 *pos++ = WLAN_EID_PWR_CAPABILITY;
834 *pos++ = 2;
835 *pos++ = 0; /* min tx power */
836 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
837
838 /* 2. supported channels */
839 /* TODO: get this in reg domain format */
840 pos = skb_put(skb, 2 * sband->n_channels + 2);
841 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
842 *pos++ = 2 * sband->n_channels;
843 for (i = 0; i < sband->n_channels; i++) {
844 *pos++ = ieee80211_frequency_to_channel(
845 sband->channels[i].center_freq);
846 *pos++ = 1; /* one channel in the subband*/
847 }
848 }
849
850 if (ifsta->extra_ie) {
851 pos = skb_put(skb, ifsta->extra_ie_len);
852 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
853 }
854
855 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
856 pos = skb_put(skb, 9);
857 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
858 *pos++ = 7; /* len */
859 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
860 *pos++ = 0x50;
861 *pos++ = 0xf2;
862 *pos++ = 2; /* WME */
863 *pos++ = 0; /* WME info */
864 *pos++ = 1; /* WME ver */
865 *pos++ = 0;
866 }
867
868 /* wmm support is a must to HT */
869 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
870 sband->ht_info.ht_supported && bss->ht_add_ie) {
871 struct ieee80211_ht_addt_info *ht_add_info =
872 (struct ieee80211_ht_addt_info *)bss->ht_add_ie;
873 u16 cap = sband->ht_info.cap;
874 __le16 tmp;
875 u32 flags = local->hw.conf.channel->flags;
876
877 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
878 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
879 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
880 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
881 cap &= ~IEEE80211_HT_CAP_SGI_40;
882 }
883 break;
884 case IEEE80211_HT_IE_CHA_SEC_BELOW:
885 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
886 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
887 cap &= ~IEEE80211_HT_CAP_SGI_40;
888 }
889 break;
890 }
891
892 tmp = cpu_to_le16(cap);
893 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
894 *pos++ = WLAN_EID_HT_CAPABILITY;
895 *pos++ = sizeof(struct ieee80211_ht_cap);
896 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
897 memcpy(pos, &tmp, sizeof(u16));
898 pos += sizeof(u16);
899 /* TODO: needs a define here for << 2 */
900 *pos++ = sband->ht_info.ampdu_factor |
901 (sband->ht_info.ampdu_density << 2);
902 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
903 }
904
905 kfree(ifsta->assocreq_ies);
906 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
907 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
908 if (ifsta->assocreq_ies)
909 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
910
911 ieee80211_sta_tx(dev, skb, 0);
912 }
913
914
915 static void ieee80211_send_deauth(struct net_device *dev,
916 struct ieee80211_if_sta *ifsta, u16 reason)
917 {
918 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
919 struct sk_buff *skb;
920 struct ieee80211_mgmt *mgmt;
921
922 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
923 if (!skb) {
924 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
925 "frame\n", dev->name);
926 return;
927 }
928 skb_reserve(skb, local->hw.extra_tx_headroom);
929
930 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
931 memset(mgmt, 0, 24);
932 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
933 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
934 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
935 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
936 IEEE80211_STYPE_DEAUTH);
937 skb_put(skb, 2);
938 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
939
940 ieee80211_sta_tx(dev, skb, 0);
941 }
942
943
944 static void ieee80211_send_disassoc(struct net_device *dev,
945 struct ieee80211_if_sta *ifsta, u16 reason)
946 {
947 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
948 struct sk_buff *skb;
949 struct ieee80211_mgmt *mgmt;
950
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
952 if (!skb) {
953 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
954 "frame\n", dev->name);
955 return;
956 }
957 skb_reserve(skb, local->hw.extra_tx_headroom);
958
959 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
960 memset(mgmt, 0, 24);
961 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
962 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
963 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
964 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
965 IEEE80211_STYPE_DISASSOC);
966 skb_put(skb, 2);
967 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
968
969 ieee80211_sta_tx(dev, skb, 0);
970 }
971
972
973 static int ieee80211_privacy_mismatch(struct net_device *dev,
974 struct ieee80211_if_sta *ifsta)
975 {
976 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
977 struct ieee80211_sta_bss *bss;
978 int bss_privacy;
979 int wep_privacy;
980 int privacy_invoked;
981
982 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
983 return 0;
984
985 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
986 local->hw.conf.channel->center_freq,
987 ifsta->ssid, ifsta->ssid_len);
988 if (!bss)
989 return 0;
990
991 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
992 wep_privacy = !!ieee80211_sta_wep_configured(dev);
993 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
994
995 ieee80211_rx_bss_put(local, bss);
996
997 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
998 return 0;
999
1000 return 1;
1001 }
1002
1003
1004 static void ieee80211_associate(struct net_device *dev,
1005 struct ieee80211_if_sta *ifsta)
1006 {
1007 DECLARE_MAC_BUF(mac);
1008
1009 ifsta->assoc_tries++;
1010 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
1011 printk(KERN_DEBUG "%s: association with AP %s"
1012 " timed out\n",
1013 dev->name, print_mac(mac, ifsta->bssid));
1014 ifsta->state = IEEE80211_DISABLED;
1015 return;
1016 }
1017
1018 ifsta->state = IEEE80211_ASSOCIATE;
1019 printk(KERN_DEBUG "%s: associate with AP %s\n",
1020 dev->name, print_mac(mac, ifsta->bssid));
1021 if (ieee80211_privacy_mismatch(dev, ifsta)) {
1022 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
1023 "mixed-cell disabled - abort association\n", dev->name);
1024 ifsta->state = IEEE80211_DISABLED;
1025 return;
1026 }
1027
1028 ieee80211_send_assoc(dev, ifsta);
1029
1030 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1031 }
1032
1033
1034 static void ieee80211_associated(struct net_device *dev,
1035 struct ieee80211_if_sta *ifsta)
1036 {
1037 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1038 struct sta_info *sta;
1039 int disassoc;
1040 DECLARE_MAC_BUF(mac);
1041
1042 /* TODO: start monitoring current AP signal quality and number of
1043 * missed beacons. Scan other channels every now and then and search
1044 * for better APs. */
1045 /* TODO: remove expired BSSes */
1046
1047 ifsta->state = IEEE80211_ASSOCIATED;
1048
1049 rcu_read_lock();
1050
1051 sta = sta_info_get(local, ifsta->bssid);
1052 if (!sta) {
1053 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
1054 dev->name, print_mac(mac, ifsta->bssid));
1055 disassoc = 1;
1056 } else {
1057 disassoc = 0;
1058 if (time_after(jiffies,
1059 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
1060 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
1061 printk(KERN_DEBUG "%s: No ProbeResp from "
1062 "current AP %s - assume out of "
1063 "range\n",
1064 dev->name, print_mac(mac, ifsta->bssid));
1065 disassoc = 1;
1066 sta_info_unlink(&sta);
1067 } else
1068 ieee80211_send_probe_req(dev, ifsta->bssid,
1069 local->scan_ssid,
1070 local->scan_ssid_len);
1071 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1072 } else {
1073 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1074 if (time_after(jiffies, ifsta->last_probe +
1075 IEEE80211_PROBE_INTERVAL)) {
1076 ifsta->last_probe = jiffies;
1077 ieee80211_send_probe_req(dev, ifsta->bssid,
1078 ifsta->ssid,
1079 ifsta->ssid_len);
1080 }
1081 }
1082 }
1083
1084 rcu_read_unlock();
1085
1086 if (disassoc && sta)
1087 sta_info_destroy(sta);
1088
1089 if (disassoc) {
1090 ifsta->state = IEEE80211_DISABLED;
1091 ieee80211_set_associated(dev, ifsta, 0);
1092 } else {
1093 mod_timer(&ifsta->timer, jiffies +
1094 IEEE80211_MONITORING_INTERVAL);
1095 }
1096 }
1097
1098
1099 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1100 u8 *ssid, size_t ssid_len)
1101 {
1102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1103 struct ieee80211_supported_band *sband;
1104 struct sk_buff *skb;
1105 struct ieee80211_mgmt *mgmt;
1106 u8 *pos, *supp_rates, *esupp_rates = NULL;
1107 int i;
1108
1109 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1110 if (!skb) {
1111 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1112 "request\n", dev->name);
1113 return;
1114 }
1115 skb_reserve(skb, local->hw.extra_tx_headroom);
1116
1117 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1118 memset(mgmt, 0, 24);
1119 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1120 IEEE80211_STYPE_PROBE_REQ);
1121 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1122 if (dst) {
1123 memcpy(mgmt->da, dst, ETH_ALEN);
1124 memcpy(mgmt->bssid, dst, ETH_ALEN);
1125 } else {
1126 memset(mgmt->da, 0xff, ETH_ALEN);
1127 memset(mgmt->bssid, 0xff, ETH_ALEN);
1128 }
1129 pos = skb_put(skb, 2 + ssid_len);
1130 *pos++ = WLAN_EID_SSID;
1131 *pos++ = ssid_len;
1132 memcpy(pos, ssid, ssid_len);
1133
1134 supp_rates = skb_put(skb, 2);
1135 supp_rates[0] = WLAN_EID_SUPP_RATES;
1136 supp_rates[1] = 0;
1137 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1138
1139 for (i = 0; i < sband->n_bitrates; i++) {
1140 struct ieee80211_rate *rate = &sband->bitrates[i];
1141 if (esupp_rates) {
1142 pos = skb_put(skb, 1);
1143 esupp_rates[1]++;
1144 } else if (supp_rates[1] == 8) {
1145 esupp_rates = skb_put(skb, 3);
1146 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1147 esupp_rates[1] = 1;
1148 pos = &esupp_rates[2];
1149 } else {
1150 pos = skb_put(skb, 1);
1151 supp_rates[1]++;
1152 }
1153 *pos = rate->bitrate / 5;
1154 }
1155
1156 ieee80211_sta_tx(dev, skb, 0);
1157 }
1158
1159
1160 static int ieee80211_sta_wep_configured(struct net_device *dev)
1161 {
1162 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1163 if (!sdata || !sdata->default_key ||
1164 sdata->default_key->conf.alg != ALG_WEP)
1165 return 0;
1166 return 1;
1167 }
1168
1169
1170 static void ieee80211_auth_completed(struct net_device *dev,
1171 struct ieee80211_if_sta *ifsta)
1172 {
1173 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1174 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1175 ieee80211_associate(dev, ifsta);
1176 }
1177
1178
1179 static void ieee80211_auth_challenge(struct net_device *dev,
1180 struct ieee80211_if_sta *ifsta,
1181 struct ieee80211_mgmt *mgmt,
1182 size_t len)
1183 {
1184 u8 *pos;
1185 struct ieee802_11_elems elems;
1186
1187 pos = mgmt->u.auth.variable;
1188 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1189 if (!elems.challenge)
1190 return;
1191 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1192 elems.challenge_len + 2, 1);
1193 }
1194
1195 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1196 u8 dialog_token, u16 status, u16 policy,
1197 u16 buf_size, u16 timeout)
1198 {
1199 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1200 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1201 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1202 struct sk_buff *skb;
1203 struct ieee80211_mgmt *mgmt;
1204 u16 capab;
1205
1206 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1207
1208 if (!skb) {
1209 printk(KERN_DEBUG "%s: failed to allocate buffer "
1210 "for addba resp frame\n", dev->name);
1211 return;
1212 }
1213
1214 skb_reserve(skb, local->hw.extra_tx_headroom);
1215 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1216 memset(mgmt, 0, 24);
1217 memcpy(mgmt->da, da, ETH_ALEN);
1218 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1219 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1220 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1221 else
1222 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1223 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1224 IEEE80211_STYPE_ACTION);
1225
1226 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1227 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1228 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1229 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1230
1231 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1232 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1233 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1234
1235 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1236 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1237 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1238
1239 ieee80211_sta_tx(dev, skb, 0);
1240
1241 return;
1242 }
1243
1244 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1245 u16 tid, u8 dialog_token, u16 start_seq_num,
1246 u16 agg_size, u16 timeout)
1247 {
1248 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1249 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1250 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1251 struct sk_buff *skb;
1252 struct ieee80211_mgmt *mgmt;
1253 u16 capab;
1254
1255 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1256
1257 if (!skb) {
1258 printk(KERN_ERR "%s: failed to allocate buffer "
1259 "for addba request frame\n", dev->name);
1260 return;
1261 }
1262 skb_reserve(skb, local->hw.extra_tx_headroom);
1263 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1264 memset(mgmt, 0, 24);
1265 memcpy(mgmt->da, da, ETH_ALEN);
1266 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1267 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1268 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1269 else
1270 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1271
1272 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1273 IEEE80211_STYPE_ACTION);
1274
1275 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1276
1277 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1278 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1279
1280 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1281 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1282 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1283 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1284
1285 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1286
1287 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1288 mgmt->u.action.u.addba_req.start_seq_num =
1289 cpu_to_le16(start_seq_num << 4);
1290
1291 ieee80211_sta_tx(dev, skb, 0);
1292 }
1293
1294 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1295 struct ieee80211_mgmt *mgmt,
1296 size_t len)
1297 {
1298 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1299 struct ieee80211_hw *hw = &local->hw;
1300 struct ieee80211_conf *conf = &hw->conf;
1301 struct sta_info *sta;
1302 struct tid_ampdu_rx *tid_agg_rx;
1303 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1304 u8 dialog_token;
1305 int ret = -EOPNOTSUPP;
1306 DECLARE_MAC_BUF(mac);
1307
1308 rcu_read_lock();
1309
1310 sta = sta_info_get(local, mgmt->sa);
1311 if (!sta) {
1312 rcu_read_unlock();
1313 return;
1314 }
1315
1316 /* extract session parameters from addba request frame */
1317 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1318 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1319 start_seq_num =
1320 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1321
1322 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1323 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1324 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1325 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1326
1327 status = WLAN_STATUS_REQUEST_DECLINED;
1328
1329 /* sanity check for incoming parameters:
1330 * check if configuration can support the BA policy
1331 * and if buffer size does not exceeds max value */
1332 if (((ba_policy != 1)
1333 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1334 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1335 status = WLAN_STATUS_INVALID_QOS_PARAM;
1336 #ifdef CONFIG_MAC80211_HT_DEBUG
1337 if (net_ratelimit())
1338 printk(KERN_DEBUG "AddBA Req with bad params from "
1339 "%s on tid %u. policy %d, buffer size %d\n",
1340 print_mac(mac, mgmt->sa), tid, ba_policy,
1341 buf_size);
1342 #endif /* CONFIG_MAC80211_HT_DEBUG */
1343 goto end_no_lock;
1344 }
1345 /* determine default buffer size */
1346 if (buf_size == 0) {
1347 struct ieee80211_supported_band *sband;
1348
1349 sband = local->hw.wiphy->bands[conf->channel->band];
1350 buf_size = IEEE80211_MIN_AMPDU_BUF;
1351 buf_size = buf_size << sband->ht_info.ampdu_factor;
1352 }
1353
1354
1355 /* examine state machine */
1356 spin_lock_bh(&sta->lock);
1357
1358 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1359 #ifdef CONFIG_MAC80211_HT_DEBUG
1360 if (net_ratelimit())
1361 printk(KERN_DEBUG "unexpected AddBA Req from "
1362 "%s on tid %u\n",
1363 print_mac(mac, mgmt->sa), tid);
1364 #endif /* CONFIG_MAC80211_HT_DEBUG */
1365 goto end;
1366 }
1367
1368 /* prepare A-MPDU MLME for Rx aggregation */
1369 sta->ampdu_mlme.tid_rx[tid] =
1370 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1371 if (!sta->ampdu_mlme.tid_rx[tid]) {
1372 #ifdef CONFIG_MAC80211_HT_DEBUG
1373 if (net_ratelimit())
1374 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1375 tid);
1376 #endif
1377 goto end;
1378 }
1379 /* rx timer */
1380 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1381 sta_rx_agg_session_timer_expired;
1382 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1383 (unsigned long)&sta->timer_to_tid[tid];
1384 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1385
1386 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1387
1388 /* prepare reordering buffer */
1389 tid_agg_rx->reorder_buf =
1390 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1391 if (!tid_agg_rx->reorder_buf) {
1392 #ifdef CONFIG_MAC80211_HT_DEBUG
1393 if (net_ratelimit())
1394 printk(KERN_ERR "can not allocate reordering buffer "
1395 "to tid %d\n", tid);
1396 #endif
1397 kfree(sta->ampdu_mlme.tid_rx[tid]);
1398 goto end;
1399 }
1400 memset(tid_agg_rx->reorder_buf, 0,
1401 buf_size * sizeof(struct sk_buff *));
1402
1403 if (local->ops->ampdu_action)
1404 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1405 sta->addr, tid, &start_seq_num);
1406 #ifdef CONFIG_MAC80211_HT_DEBUG
1407 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1408 #endif /* CONFIG_MAC80211_HT_DEBUG */
1409
1410 if (ret) {
1411 kfree(tid_agg_rx->reorder_buf);
1412 kfree(tid_agg_rx);
1413 sta->ampdu_mlme.tid_rx[tid] = NULL;
1414 goto end;
1415 }
1416
1417 /* change state and send addba resp */
1418 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1419 tid_agg_rx->dialog_token = dialog_token;
1420 tid_agg_rx->ssn = start_seq_num;
1421 tid_agg_rx->head_seq_num = start_seq_num;
1422 tid_agg_rx->buf_size = buf_size;
1423 tid_agg_rx->timeout = timeout;
1424 tid_agg_rx->stored_mpdu_num = 0;
1425 status = WLAN_STATUS_SUCCESS;
1426 end:
1427 spin_unlock_bh(&sta->lock);
1428
1429 end_no_lock:
1430 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1431 dialog_token, status, 1, buf_size, timeout);
1432 rcu_read_unlock();
1433 }
1434
1435 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1436 struct ieee80211_mgmt *mgmt,
1437 size_t len)
1438 {
1439 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1440 struct ieee80211_hw *hw = &local->hw;
1441 struct sta_info *sta;
1442 u16 capab;
1443 u16 tid;
1444 u8 *state;
1445
1446 rcu_read_lock();
1447
1448 sta = sta_info_get(local, mgmt->sa);
1449 if (!sta) {
1450 rcu_read_unlock();
1451 return;
1452 }
1453
1454 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1455 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1456
1457 state = &sta->ampdu_mlme.tid_state_tx[tid];
1458
1459 spin_lock_bh(&sta->lock);
1460
1461 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1462 spin_unlock_bh(&sta->lock);
1463 goto addba_resp_exit;
1464 }
1465
1466 if (mgmt->u.action.u.addba_resp.dialog_token !=
1467 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1468 spin_unlock_bh(&sta->lock);
1469 #ifdef CONFIG_MAC80211_HT_DEBUG
1470 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1471 #endif /* CONFIG_MAC80211_HT_DEBUG */
1472 goto addba_resp_exit;
1473 }
1474
1475 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1476 #ifdef CONFIG_MAC80211_HT_DEBUG
1477 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1478 #endif /* CONFIG_MAC80211_HT_DEBUG */
1479 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1480 == WLAN_STATUS_SUCCESS) {
1481 *state |= HT_ADDBA_RECEIVED_MSK;
1482 sta->ampdu_mlme.addba_req_num[tid] = 0;
1483
1484 if (*state == HT_AGG_STATE_OPERATIONAL)
1485 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1486
1487 spin_unlock_bh(&sta->lock);
1488 } else {
1489 sta->ampdu_mlme.addba_req_num[tid]++;
1490 /* this will allow the state check in stop_BA_session */
1491 *state = HT_AGG_STATE_OPERATIONAL;
1492 spin_unlock_bh(&sta->lock);
1493 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1494 WLAN_BACK_INITIATOR);
1495 }
1496
1497 addba_resp_exit:
1498 rcu_read_unlock();
1499 }
1500
1501 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1502 u16 initiator, u16 reason_code)
1503 {
1504 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1505 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1506 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1507 struct sk_buff *skb;
1508 struct ieee80211_mgmt *mgmt;
1509 u16 params;
1510
1511 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1512
1513 if (!skb) {
1514 printk(KERN_ERR "%s: failed to allocate buffer "
1515 "for delba frame\n", dev->name);
1516 return;
1517 }
1518
1519 skb_reserve(skb, local->hw.extra_tx_headroom);
1520 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1521 memset(mgmt, 0, 24);
1522 memcpy(mgmt->da, da, ETH_ALEN);
1523 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1524 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1525 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1526 else
1527 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1528 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1529 IEEE80211_STYPE_ACTION);
1530
1531 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1532
1533 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1534 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1535 params = (u16)(initiator << 11); /* bit 11 initiator */
1536 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1537
1538 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1539 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1540
1541 ieee80211_sta_tx(dev, skb, 0);
1542 }
1543
1544 void ieee80211_send_bar(struct net_device *dev, u8 *ra, u16 tid, u16 ssn)
1545 {
1546 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1547 struct sk_buff *skb;
1548 struct ieee80211_bar *bar;
1549 u16 bar_control = 0;
1550
1551 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1552 if (!skb) {
1553 printk(KERN_ERR "%s: failed to allocate buffer for "
1554 "bar frame\n", dev->name);
1555 return;
1556 }
1557 skb_reserve(skb, local->hw.extra_tx_headroom);
1558 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1559 memset(bar, 0, sizeof(*bar));
1560 bar->frame_control = IEEE80211_FC(IEEE80211_FTYPE_CTL,
1561 IEEE80211_STYPE_BACK_REQ);
1562 memcpy(bar->ra, ra, ETH_ALEN);
1563 memcpy(bar->ta, dev->dev_addr, ETH_ALEN);
1564 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1565 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1566 bar_control |= (u16)(tid << 12);
1567 bar->control = cpu_to_le16(bar_control);
1568 bar->start_seq_num = cpu_to_le16(ssn);
1569
1570 ieee80211_sta_tx(dev, skb, 0);
1571 }
1572
1573 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1574 u16 initiator, u16 reason)
1575 {
1576 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1577 struct ieee80211_hw *hw = &local->hw;
1578 struct sta_info *sta;
1579 int ret, i;
1580 DECLARE_MAC_BUF(mac);
1581
1582 rcu_read_lock();
1583
1584 sta = sta_info_get(local, ra);
1585 if (!sta) {
1586 rcu_read_unlock();
1587 return;
1588 }
1589
1590 /* check if TID is in operational state */
1591 spin_lock_bh(&sta->lock);
1592 if (sta->ampdu_mlme.tid_state_rx[tid]
1593 != HT_AGG_STATE_OPERATIONAL) {
1594 spin_unlock_bh(&sta->lock);
1595 rcu_read_unlock();
1596 return;
1597 }
1598 sta->ampdu_mlme.tid_state_rx[tid] =
1599 HT_AGG_STATE_REQ_STOP_BA_MSK |
1600 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1601 spin_unlock_bh(&sta->lock);
1602
1603 /* stop HW Rx aggregation. ampdu_action existence
1604 * already verified in session init so we add the BUG_ON */
1605 BUG_ON(!local->ops->ampdu_action);
1606
1607 #ifdef CONFIG_MAC80211_HT_DEBUG
1608 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1609 print_mac(mac, ra), tid);
1610 #endif /* CONFIG_MAC80211_HT_DEBUG */
1611
1612 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1613 ra, tid, NULL);
1614 if (ret)
1615 printk(KERN_DEBUG "HW problem - can not stop rx "
1616 "aggregation for tid %d\n", tid);
1617
1618 /* shutdown timer has not expired */
1619 if (initiator != WLAN_BACK_TIMER)
1620 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1621
1622 /* check if this is a self generated aggregation halt */
1623 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1624 ieee80211_send_delba(dev, ra, tid, 0, reason);
1625
1626 /* free the reordering buffer */
1627 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1628 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1629 /* release the reordered frames */
1630 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1631 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1632 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1633 }
1634 }
1635 /* free resources */
1636 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1637 kfree(sta->ampdu_mlme.tid_rx[tid]);
1638 sta->ampdu_mlme.tid_rx[tid] = NULL;
1639 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1640
1641 rcu_read_unlock();
1642 }
1643
1644
1645 static void ieee80211_sta_process_delba(struct net_device *dev,
1646 struct ieee80211_mgmt *mgmt, size_t len)
1647 {
1648 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1649 struct sta_info *sta;
1650 u16 tid, params;
1651 u16 initiator;
1652 DECLARE_MAC_BUF(mac);
1653
1654 rcu_read_lock();
1655
1656 sta = sta_info_get(local, mgmt->sa);
1657 if (!sta) {
1658 rcu_read_unlock();
1659 return;
1660 }
1661
1662 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1663 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1664 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1665
1666 #ifdef CONFIG_MAC80211_HT_DEBUG
1667 if (net_ratelimit())
1668 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1669 print_mac(mac, mgmt->sa),
1670 initiator ? "initiator" : "recipient", tid,
1671 mgmt->u.action.u.delba.reason_code);
1672 #endif /* CONFIG_MAC80211_HT_DEBUG */
1673
1674 if (initiator == WLAN_BACK_INITIATOR)
1675 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1676 WLAN_BACK_INITIATOR, 0);
1677 else { /* WLAN_BACK_RECIPIENT */
1678 spin_lock_bh(&sta->lock);
1679 sta->ampdu_mlme.tid_state_tx[tid] =
1680 HT_AGG_STATE_OPERATIONAL;
1681 spin_unlock_bh(&sta->lock);
1682 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1683 WLAN_BACK_RECIPIENT);
1684 }
1685 rcu_read_unlock();
1686 }
1687
1688 /*
1689 * After sending add Block Ack request we activated a timer until
1690 * add Block Ack response will arrive from the recipient.
1691 * If this timer expires sta_addba_resp_timer_expired will be executed.
1692 */
1693 void sta_addba_resp_timer_expired(unsigned long data)
1694 {
1695 /* not an elegant detour, but there is no choice as the timer passes
1696 * only one argument, and both sta_info and TID are needed, so init
1697 * flow in sta_info_create gives the TID as data, while the timer_to_id
1698 * array gives the sta through container_of */
1699 u16 tid = *(u8 *)data;
1700 struct sta_info *temp_sta = container_of((void *)data,
1701 struct sta_info, timer_to_tid[tid]);
1702
1703 struct ieee80211_local *local = temp_sta->local;
1704 struct ieee80211_hw *hw = &local->hw;
1705 struct sta_info *sta;
1706 u8 *state;
1707
1708 rcu_read_lock();
1709
1710 sta = sta_info_get(local, temp_sta->addr);
1711 if (!sta) {
1712 rcu_read_unlock();
1713 return;
1714 }
1715
1716 state = &sta->ampdu_mlme.tid_state_tx[tid];
1717 /* check if the TID waits for addBA response */
1718 spin_lock_bh(&sta->lock);
1719 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1720 spin_unlock_bh(&sta->lock);
1721 *state = HT_AGG_STATE_IDLE;
1722 #ifdef CONFIG_MAC80211_HT_DEBUG
1723 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1724 "expecting addBA response there", tid);
1725 #endif
1726 goto timer_expired_exit;
1727 }
1728
1729 #ifdef CONFIG_MAC80211_HT_DEBUG
1730 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1731 #endif
1732
1733 /* go through the state check in stop_BA_session */
1734 *state = HT_AGG_STATE_OPERATIONAL;
1735 spin_unlock_bh(&sta->lock);
1736 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1737 WLAN_BACK_INITIATOR);
1738
1739 timer_expired_exit:
1740 rcu_read_unlock();
1741 }
1742
1743 /*
1744 * After accepting the AddBA Request we activated a timer,
1745 * resetting it after each frame that arrives from the originator.
1746 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1747 */
1748 static void sta_rx_agg_session_timer_expired(unsigned long data)
1749 {
1750 /* not an elegant detour, but there is no choice as the timer passes
1751 * only one argument, and various sta_info are needed here, so init
1752 * flow in sta_info_create gives the TID as data, while the timer_to_id
1753 * array gives the sta through container_of */
1754 u8 *ptid = (u8 *)data;
1755 u8 *timer_to_id = ptid - *ptid;
1756 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1757 timer_to_tid[0]);
1758
1759 #ifdef CONFIG_MAC80211_HT_DEBUG
1760 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1761 #endif
1762 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1763 (u16)*ptid, WLAN_BACK_TIMER,
1764 WLAN_REASON_QSTA_TIMEOUT);
1765 }
1766
1767 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1768 {
1769 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1770 int i;
1771
1772 for (i = 0; i < STA_TID_NUM; i++) {
1773 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1774 WLAN_BACK_INITIATOR);
1775 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1776 WLAN_BACK_RECIPIENT,
1777 WLAN_REASON_QSTA_LEAVE_QBSS);
1778 }
1779 }
1780
1781 static void ieee80211_send_refuse_measurement_request(struct net_device *dev,
1782 struct ieee80211_msrment_ie *request_ie,
1783 const u8 *da, const u8 *bssid,
1784 u8 dialog_token)
1785 {
1786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1787 struct sk_buff *skb;
1788 struct ieee80211_mgmt *msr_report;
1789
1790 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1791 sizeof(struct ieee80211_msrment_ie));
1792
1793 if (!skb) {
1794 printk(KERN_ERR "%s: failed to allocate buffer for "
1795 "measurement report frame\n", dev->name);
1796 return;
1797 }
1798
1799 skb_reserve(skb, local->hw.extra_tx_headroom);
1800 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1801 memset(msr_report, 0, 24);
1802 memcpy(msr_report->da, da, ETH_ALEN);
1803 memcpy(msr_report->sa, dev->dev_addr, ETH_ALEN);
1804 memcpy(msr_report->bssid, bssid, ETH_ALEN);
1805 msr_report->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1806 IEEE80211_STYPE_ACTION);
1807
1808 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1809 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1810 msr_report->u.action.u.measurement.action_code =
1811 WLAN_ACTION_SPCT_MSR_RPRT;
1812 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1813
1814 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1815 msr_report->u.action.u.measurement.length =
1816 sizeof(struct ieee80211_msrment_ie);
1817
1818 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1819 sizeof(struct ieee80211_msrment_ie));
1820 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1821 msr_report->u.action.u.measurement.msr_elem.mode |=
1822 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1823 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1824
1825 ieee80211_sta_tx(dev, skb, 0);
1826 }
1827
1828 static void ieee80211_sta_process_measurement_req(struct net_device *dev,
1829 struct ieee80211_mgmt *mgmt,
1830 size_t len)
1831 {
1832 /*
1833 * Ignoring measurement request is spec violation.
1834 * Mandatory measurements must be reported optional
1835 * measurements might be refused or reported incapable
1836 * For now just refuse
1837 * TODO: Answer basic measurement as unmeasured
1838 */
1839 ieee80211_send_refuse_measurement_request(dev,
1840 &mgmt->u.action.u.measurement.msr_elem,
1841 mgmt->sa, mgmt->bssid,
1842 mgmt->u.action.u.measurement.dialog_token);
1843 }
1844
1845
1846 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1847 struct ieee80211_if_sta *ifsta,
1848 struct ieee80211_mgmt *mgmt,
1849 size_t len)
1850 {
1851 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1852 u16 auth_alg, auth_transaction, status_code;
1853 DECLARE_MAC_BUF(mac);
1854
1855 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1856 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1857 return;
1858
1859 if (len < 24 + 6)
1860 return;
1861
1862 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1863 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
1864 return;
1865
1866 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1867 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1868 return;
1869
1870 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1871 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1872 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1873
1874 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1875 /*
1876 * IEEE 802.11 standard does not require authentication in IBSS
1877 * networks and most implementations do not seem to use it.
1878 * However, try to reply to authentication attempts if someone
1879 * has actually implemented this.
1880 */
1881 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
1882 return;
1883 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1884 }
1885
1886 if (auth_alg != ifsta->auth_alg ||
1887 auth_transaction != ifsta->auth_transaction)
1888 return;
1889
1890 if (status_code != WLAN_STATUS_SUCCESS) {
1891 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1892 u8 algs[3];
1893 const int num_algs = ARRAY_SIZE(algs);
1894 int i, pos;
1895 algs[0] = algs[1] = algs[2] = 0xff;
1896 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1897 algs[0] = WLAN_AUTH_OPEN;
1898 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1899 algs[1] = WLAN_AUTH_SHARED_KEY;
1900 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1901 algs[2] = WLAN_AUTH_LEAP;
1902 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1903 pos = 0;
1904 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1905 pos = 1;
1906 else
1907 pos = 2;
1908 for (i = 0; i < num_algs; i++) {
1909 pos++;
1910 if (pos >= num_algs)
1911 pos = 0;
1912 if (algs[pos] == ifsta->auth_alg ||
1913 algs[pos] == 0xff)
1914 continue;
1915 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1916 !ieee80211_sta_wep_configured(dev))
1917 continue;
1918 ifsta->auth_alg = algs[pos];
1919 break;
1920 }
1921 }
1922 return;
1923 }
1924
1925 switch (ifsta->auth_alg) {
1926 case WLAN_AUTH_OPEN:
1927 case WLAN_AUTH_LEAP:
1928 ieee80211_auth_completed(dev, ifsta);
1929 break;
1930 case WLAN_AUTH_SHARED_KEY:
1931 if (ifsta->auth_transaction == 4)
1932 ieee80211_auth_completed(dev, ifsta);
1933 else
1934 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1935 break;
1936 }
1937 }
1938
1939
1940 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1941 struct ieee80211_if_sta *ifsta,
1942 struct ieee80211_mgmt *mgmt,
1943 size_t len)
1944 {
1945 u16 reason_code;
1946 DECLARE_MAC_BUF(mac);
1947
1948 if (len < 24 + 2)
1949 return;
1950
1951 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1952 return;
1953
1954 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1955
1956 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
1957 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1958
1959 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1960 ifsta->state == IEEE80211_ASSOCIATE ||
1961 ifsta->state == IEEE80211_ASSOCIATED) {
1962 ifsta->state = IEEE80211_AUTHENTICATE;
1963 mod_timer(&ifsta->timer, jiffies +
1964 IEEE80211_RETRY_AUTH_INTERVAL);
1965 }
1966
1967 ieee80211_set_disassoc(dev, ifsta, 1);
1968 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1969 }
1970
1971
1972 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1973 struct ieee80211_if_sta *ifsta,
1974 struct ieee80211_mgmt *mgmt,
1975 size_t len)
1976 {
1977 u16 reason_code;
1978 DECLARE_MAC_BUF(mac);
1979
1980 if (len < 24 + 2)
1981 return;
1982
1983 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
1984 return;
1985
1986 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1987
1988 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1989 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1990
1991 if (ifsta->state == IEEE80211_ASSOCIATED) {
1992 ifsta->state = IEEE80211_ASSOCIATE;
1993 mod_timer(&ifsta->timer, jiffies +
1994 IEEE80211_RETRY_AUTH_INTERVAL);
1995 }
1996
1997 ieee80211_set_disassoc(dev, ifsta, 0);
1998 }
1999
2000
2001 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2002 struct ieee80211_if_sta *ifsta,
2003 struct ieee80211_mgmt *mgmt,
2004 size_t len,
2005 int reassoc)
2006 {
2007 struct ieee80211_local *local = sdata->local;
2008 struct net_device *dev = sdata->dev;
2009 struct ieee80211_supported_band *sband;
2010 struct sta_info *sta;
2011 u64 rates, basic_rates;
2012 u16 capab_info, status_code, aid;
2013 struct ieee802_11_elems elems;
2014 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
2015 u8 *pos;
2016 int i, j;
2017 DECLARE_MAC_BUF(mac);
2018 bool have_higher_than_11mbit = false;
2019
2020 /* AssocResp and ReassocResp have identical structure, so process both
2021 * of them in this function. */
2022
2023 if (ifsta->state != IEEE80211_ASSOCIATE)
2024 return;
2025
2026 if (len < 24 + 6)
2027 return;
2028
2029 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
2030 return;
2031
2032 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2033 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2034 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2035
2036 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
2037 "status=%d aid=%d)\n",
2038 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
2039 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2040
2041 if (status_code != WLAN_STATUS_SUCCESS) {
2042 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
2043 dev->name, status_code);
2044 /* if this was a reassociation, ensure we try a "full"
2045 * association next time. This works around some broken APs
2046 * which do not correctly reject reassociation requests. */
2047 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2048 return;
2049 }
2050
2051 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2052 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
2053 "set\n", dev->name, aid);
2054 aid &= ~(BIT(15) | BIT(14));
2055
2056 pos = mgmt->u.assoc_resp.variable;
2057 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2058
2059 if (!elems.supp_rates) {
2060 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
2061 dev->name);
2062 return;
2063 }
2064
2065 printk(KERN_DEBUG "%s: associated\n", dev->name);
2066 ifsta->aid = aid;
2067 ifsta->ap_capab = capab_info;
2068
2069 kfree(ifsta->assocresp_ies);
2070 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
2071 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
2072 if (ifsta->assocresp_ies)
2073 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2074
2075 rcu_read_lock();
2076
2077 /* Add STA entry for the AP */
2078 sta = sta_info_get(local, ifsta->bssid);
2079 if (!sta) {
2080 struct ieee80211_sta_bss *bss;
2081 int err;
2082
2083 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2084 if (!sta) {
2085 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2086 " the AP\n", dev->name);
2087 rcu_read_unlock();
2088 return;
2089 }
2090 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2091 local->hw.conf.channel->center_freq,
2092 ifsta->ssid, ifsta->ssid_len);
2093 if (bss) {
2094 sta->last_signal = bss->signal;
2095 sta->last_qual = bss->qual;
2096 sta->last_noise = bss->noise;
2097 ieee80211_rx_bss_put(local, bss);
2098 }
2099
2100 err = sta_info_insert(sta);
2101 if (err) {
2102 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2103 " the AP (error %d)\n", dev->name, err);
2104 rcu_read_unlock();
2105 return;
2106 }
2107 }
2108
2109 /*
2110 * FIXME: Do we really need to update the sta_info's information here?
2111 * We already know about the AP (we found it in our list) so it
2112 * should already be filled with the right info, no?
2113 * As is stands, all this is racy because typically we assume
2114 * the information that is filled in here (except flags) doesn't
2115 * change while a STA structure is alive. As such, it should move
2116 * to between the sta_info_alloc() and sta_info_insert() above.
2117 */
2118
2119 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2120 WLAN_STA_AUTHORIZED);
2121
2122 rates = 0;
2123 basic_rates = 0;
2124 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2125
2126 for (i = 0; i < elems.supp_rates_len; i++) {
2127 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2128
2129 if (rate > 110)
2130 have_higher_than_11mbit = true;
2131
2132 for (j = 0; j < sband->n_bitrates; j++) {
2133 if (sband->bitrates[j].bitrate == rate)
2134 rates |= BIT(j);
2135 if (elems.supp_rates[i] & 0x80)
2136 basic_rates |= BIT(j);
2137 }
2138 }
2139
2140 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2141 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2142
2143 if (rate > 110)
2144 have_higher_than_11mbit = true;
2145
2146 for (j = 0; j < sband->n_bitrates; j++) {
2147 if (sband->bitrates[j].bitrate == rate)
2148 rates |= BIT(j);
2149 if (elems.ext_supp_rates[i] & 0x80)
2150 basic_rates |= BIT(j);
2151 }
2152 }
2153
2154 sta->supp_rates[local->hw.conf.channel->band] = rates;
2155 sdata->basic_rates = basic_rates;
2156
2157 /* cf. IEEE 802.11 9.2.12 */
2158 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2159 have_higher_than_11mbit)
2160 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2161 else
2162 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2163
2164 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2165 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2166 struct ieee80211_ht_bss_info bss_info;
2167 ieee80211_ht_cap_ie_to_ht_info(
2168 (struct ieee80211_ht_cap *)
2169 elems.ht_cap_elem, &sta->ht_info);
2170 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2171 (struct ieee80211_ht_addt_info *)
2172 elems.ht_info_elem, &bss_info);
2173 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2174 }
2175
2176 rate_control_rate_init(sta, local);
2177
2178 if (elems.wmm_param) {
2179 set_sta_flags(sta, WLAN_STA_WME);
2180 rcu_read_unlock();
2181 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2182 elems.wmm_param_len);
2183 } else
2184 rcu_read_unlock();
2185
2186 /* set AID and assoc capability,
2187 * ieee80211_set_associated() will tell the driver */
2188 bss_conf->aid = aid;
2189 bss_conf->assoc_capability = capab_info;
2190 ieee80211_set_associated(dev, ifsta, 1);
2191
2192 ieee80211_associated(dev, ifsta);
2193 }
2194
2195
2196 /* Caller must hold local->sta_bss_lock */
2197 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2198 struct ieee80211_sta_bss *bss)
2199 {
2200 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2201 u8 hash_idx;
2202
2203 if (bss_mesh_cfg(bss))
2204 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2205 bss_mesh_id_len(bss));
2206 else
2207 hash_idx = STA_HASH(bss->bssid);
2208
2209 bss->hnext = local->sta_bss_hash[hash_idx];
2210 local->sta_bss_hash[hash_idx] = bss;
2211 }
2212
2213
2214 /* Caller must hold local->sta_bss_lock */
2215 static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
2216 struct ieee80211_sta_bss *bss)
2217 {
2218 struct ieee80211_sta_bss *b, *prev = NULL;
2219 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2220 while (b) {
2221 if (b == bss) {
2222 if (!prev)
2223 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2224 bss->hnext;
2225 else
2226 prev->hnext = bss->hnext;
2227 break;
2228 }
2229 prev = b;
2230 b = b->hnext;
2231 }
2232 }
2233
2234
2235 static struct ieee80211_sta_bss *
2236 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2237 u8 *ssid, u8 ssid_len)
2238 {
2239 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2240 struct ieee80211_sta_bss *bss;
2241
2242 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2243 if (!bss)
2244 return NULL;
2245 atomic_inc(&bss->users);
2246 atomic_inc(&bss->users);
2247 memcpy(bss->bssid, bssid, ETH_ALEN);
2248 bss->freq = freq;
2249 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2250 memcpy(bss->ssid, ssid, ssid_len);
2251 bss->ssid_len = ssid_len;
2252 }
2253
2254 spin_lock_bh(&local->sta_bss_lock);
2255 /* TODO: order by RSSI? */
2256 list_add_tail(&bss->list, &local->sta_bss_list);
2257 __ieee80211_rx_bss_hash_add(dev, bss);
2258 spin_unlock_bh(&local->sta_bss_lock);
2259 return bss;
2260 }
2261
2262 static struct ieee80211_sta_bss *
2263 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2264 u8 *ssid, u8 ssid_len)
2265 {
2266 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2267 struct ieee80211_sta_bss *bss;
2268
2269 spin_lock_bh(&local->sta_bss_lock);
2270 bss = local->sta_bss_hash[STA_HASH(bssid)];
2271 while (bss) {
2272 if (!bss_mesh_cfg(bss) &&
2273 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2274 bss->freq == freq &&
2275 bss->ssid_len == ssid_len &&
2276 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2277 atomic_inc(&bss->users);
2278 break;
2279 }
2280 bss = bss->hnext;
2281 }
2282 spin_unlock_bh(&local->sta_bss_lock);
2283 return bss;
2284 }
2285
2286 #ifdef CONFIG_MAC80211_MESH
2287 static struct ieee80211_sta_bss *
2288 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2289 u8 *mesh_cfg, int freq)
2290 {
2291 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2292 struct ieee80211_sta_bss *bss;
2293
2294 spin_lock_bh(&local->sta_bss_lock);
2295 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2296 while (bss) {
2297 if (bss_mesh_cfg(bss) &&
2298 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2299 bss->freq == freq &&
2300 mesh_id_len == bss->mesh_id_len &&
2301 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2302 mesh_id_len))) {
2303 atomic_inc(&bss->users);
2304 break;
2305 }
2306 bss = bss->hnext;
2307 }
2308 spin_unlock_bh(&local->sta_bss_lock);
2309 return bss;
2310 }
2311
2312 static struct ieee80211_sta_bss *
2313 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2314 u8 *mesh_cfg, int mesh_config_len, int freq)
2315 {
2316 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2317 struct ieee80211_sta_bss *bss;
2318
2319 if (mesh_config_len != MESH_CFG_LEN)
2320 return NULL;
2321
2322 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2323 if (!bss)
2324 return NULL;
2325
2326 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2327 if (!bss->mesh_cfg) {
2328 kfree(bss);
2329 return NULL;
2330 }
2331
2332 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2333 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2334 if (!bss->mesh_id) {
2335 kfree(bss->mesh_cfg);
2336 kfree(bss);
2337 return NULL;
2338 }
2339 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2340 }
2341
2342 atomic_inc(&bss->users);
2343 atomic_inc(&bss->users);
2344 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2345 bss->mesh_id_len = mesh_id_len;
2346 bss->freq = freq;
2347 spin_lock_bh(&local->sta_bss_lock);
2348 /* TODO: order by RSSI? */
2349 list_add_tail(&bss->list, &local->sta_bss_list);
2350 __ieee80211_rx_bss_hash_add(dev, bss);
2351 spin_unlock_bh(&local->sta_bss_lock);
2352 return bss;
2353 }
2354 #endif
2355
2356 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2357 {
2358 kfree(bss->wpa_ie);
2359 kfree(bss->rsn_ie);
2360 kfree(bss->wmm_ie);
2361 kfree(bss->ht_ie);
2362 kfree(bss->ht_add_ie);
2363 kfree(bss_mesh_id(bss));
2364 kfree(bss_mesh_cfg(bss));
2365 kfree(bss);
2366 }
2367
2368
2369 static void ieee80211_rx_bss_put(struct ieee80211_local *local,
2370 struct ieee80211_sta_bss *bss)
2371 {
2372 local_bh_disable();
2373 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2374 local_bh_enable();
2375 return;
2376 }
2377
2378 __ieee80211_rx_bss_hash_del(local, bss);
2379 list_del(&bss->list);
2380 spin_unlock_bh(&local->sta_bss_lock);
2381 ieee80211_rx_bss_free(bss);
2382 }
2383
2384
2385 void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
2386 {
2387 spin_lock_init(&local->sta_bss_lock);
2388 INIT_LIST_HEAD(&local->sta_bss_list);
2389 }
2390
2391
2392 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
2393 {
2394 struct ieee80211_sta_bss *bss, *tmp;
2395
2396 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2397 ieee80211_rx_bss_put(local, bss);
2398 }
2399
2400
2401 static int ieee80211_sta_join_ibss(struct net_device *dev,
2402 struct ieee80211_if_sta *ifsta,
2403 struct ieee80211_sta_bss *bss)
2404 {
2405 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2406 int res, rates, i, j;
2407 struct sk_buff *skb;
2408 struct ieee80211_mgmt *mgmt;
2409 u8 *pos;
2410 struct ieee80211_sub_if_data *sdata;
2411 struct ieee80211_supported_band *sband;
2412 union iwreq_data wrqu;
2413
2414 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2415
2416 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2417
2418 /* Remove possible STA entries from other IBSS networks. */
2419 sta_info_flush_delayed(sdata);
2420
2421 if (local->ops->reset_tsf) {
2422 /* Reset own TSF to allow time synchronization work. */
2423 local->ops->reset_tsf(local_to_hw(local));
2424 }
2425 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2426 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
2427 if (res)
2428 return res;
2429
2430 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2431
2432 sdata->drop_unencrypted = bss->capability &
2433 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2434
2435 res = ieee80211_set_freq(dev, bss->freq);
2436
2437 if (res)
2438 return res;
2439
2440 /* Build IBSS probe response */
2441 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2442 if (skb) {
2443 skb_reserve(skb, local->hw.extra_tx_headroom);
2444
2445 mgmt = (struct ieee80211_mgmt *)
2446 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2447 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2448 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2449 IEEE80211_STYPE_PROBE_RESP);
2450 memset(mgmt->da, 0xff, ETH_ALEN);
2451 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2452 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2453 mgmt->u.beacon.beacon_int =
2454 cpu_to_le16(local->hw.conf.beacon_int);
2455 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
2456 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2457
2458 pos = skb_put(skb, 2 + ifsta->ssid_len);
2459 *pos++ = WLAN_EID_SSID;
2460 *pos++ = ifsta->ssid_len;
2461 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2462
2463 rates = bss->supp_rates_len;
2464 if (rates > 8)
2465 rates = 8;
2466 pos = skb_put(skb, 2 + rates);
2467 *pos++ = WLAN_EID_SUPP_RATES;
2468 *pos++ = rates;
2469 memcpy(pos, bss->supp_rates, rates);
2470
2471 if (bss->band == IEEE80211_BAND_2GHZ) {
2472 pos = skb_put(skb, 2 + 1);
2473 *pos++ = WLAN_EID_DS_PARAMS;
2474 *pos++ = 1;
2475 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2476 }
2477
2478 pos = skb_put(skb, 2 + 2);
2479 *pos++ = WLAN_EID_IBSS_PARAMS;
2480 *pos++ = 2;
2481 /* FIX: set ATIM window based on scan results */
2482 *pos++ = 0;
2483 *pos++ = 0;
2484
2485 if (bss->supp_rates_len > 8) {
2486 rates = bss->supp_rates_len - 8;
2487 pos = skb_put(skb, 2 + rates);
2488 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2489 *pos++ = rates;
2490 memcpy(pos, &bss->supp_rates[8], rates);
2491 }
2492
2493 ifsta->probe_resp = skb;
2494
2495 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2496 }
2497
2498 rates = 0;
2499 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2500 for (i = 0; i < bss->supp_rates_len; i++) {
2501 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2502 for (j = 0; j < sband->n_bitrates; j++)
2503 if (sband->bitrates[j].bitrate == bitrate)
2504 rates |= BIT(j);
2505 }
2506 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2507
2508 ieee80211_sta_def_wmm_params(dev, bss, 1);
2509
2510 ifsta->state = IEEE80211_IBSS_JOINED;
2511 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2512
2513 memset(&wrqu, 0, sizeof(wrqu));
2514 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2515 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2516
2517 return res;
2518 }
2519
2520 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2521 struct ieee802_11_elems *elems,
2522 enum ieee80211_band band)
2523 {
2524 struct ieee80211_supported_band *sband;
2525 struct ieee80211_rate *bitrates;
2526 size_t num_rates;
2527 u64 supp_rates;
2528 int i, j;
2529 sband = local->hw.wiphy->bands[band];
2530
2531 if (!sband) {
2532 WARN_ON(1);
2533 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2534 }
2535
2536 bitrates = sband->bitrates;
2537 num_rates = sband->n_bitrates;
2538 supp_rates = 0;
2539 for (i = 0; i < elems->supp_rates_len +
2540 elems->ext_supp_rates_len; i++) {
2541 u8 rate = 0;
2542 int own_rate;
2543 if (i < elems->supp_rates_len)
2544 rate = elems->supp_rates[i];
2545 else if (elems->ext_supp_rates)
2546 rate = elems->ext_supp_rates
2547 [i - elems->supp_rates_len];
2548 own_rate = 5 * (rate & 0x7f);
2549 for (j = 0; j < num_rates; j++)
2550 if (bitrates[j].bitrate == own_rate)
2551 supp_rates |= BIT(j);
2552 }
2553 return supp_rates;
2554 }
2555
2556
2557 static void ieee80211_rx_bss_info(struct net_device *dev,
2558 struct ieee80211_mgmt *mgmt,
2559 size_t len,
2560 struct ieee80211_rx_status *rx_status,
2561 struct ieee802_11_elems *elems,
2562 int beacon)
2563 {
2564 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2565 int freq, clen;
2566 struct ieee80211_sta_bss *bss;
2567 struct sta_info *sta;
2568 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2569 u64 beacon_timestamp, rx_timestamp;
2570 struct ieee80211_channel *channel;
2571 DECLARE_MAC_BUF(mac);
2572 DECLARE_MAC_BUF(mac2);
2573
2574 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2575 return; /* ignore ProbeResp to foreign address */
2576
2577 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2578
2579 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
2580 elems->mesh_config && mesh_matches_local(elems, dev)) {
2581 u64 rates = ieee80211_sta_get_rates(local, elems,
2582 rx_status->band);
2583
2584 mesh_neighbour_update(mgmt->sa, rates, dev,
2585 mesh_peer_accepts_plinks(elems, dev));
2586 }
2587
2588 rcu_read_lock();
2589
2590 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
2591 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2592 (sta = sta_info_get(local, mgmt->sa))) {
2593 u64 prev_rates;
2594 u64 supp_rates = ieee80211_sta_get_rates(local, elems,
2595 rx_status->band);
2596
2597 prev_rates = sta->supp_rates[rx_status->band];
2598 sta->supp_rates[rx_status->band] &= supp_rates;
2599 if (sta->supp_rates[rx_status->band] == 0) {
2600 /* No matching rates - this should not really happen.
2601 * Make sure that at least one rate is marked
2602 * supported to avoid issues with TX rate ctrl. */
2603 sta->supp_rates[rx_status->band] =
2604 sdata->u.sta.supp_rates_bits[rx_status->band];
2605 }
2606 }
2607
2608 rcu_read_unlock();
2609
2610 if (elems->ds_params && elems->ds_params_len == 1)
2611 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2612 else
2613 freq = rx_status->freq;
2614
2615 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2616
2617 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2618 return;
2619
2620 #ifdef CONFIG_MAC80211_MESH
2621 if (elems->mesh_config)
2622 bss = ieee80211_rx_mesh_bss_get(dev, elems->mesh_id,
2623 elems->mesh_id_len, elems->mesh_config, freq);
2624 else
2625 #endif
2626 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2627 elems->ssid, elems->ssid_len);
2628 if (!bss) {
2629 #ifdef CONFIG_MAC80211_MESH
2630 if (elems->mesh_config)
2631 bss = ieee80211_rx_mesh_bss_add(dev, elems->mesh_id,
2632 elems->mesh_id_len, elems->mesh_config,
2633 elems->mesh_config_len, freq);
2634 else
2635 #endif
2636 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2637 elems->ssid, elems->ssid_len);
2638 if (!bss)
2639 return;
2640 } else {
2641 #if 0
2642 /* TODO: order by RSSI? */
2643 spin_lock_bh(&local->sta_bss_lock);
2644 list_move_tail(&bss->list, &local->sta_bss_list);
2645 spin_unlock_bh(&local->sta_bss_lock);
2646 #endif
2647 }
2648
2649 /* save the ERP value so that it is available at association time */
2650 if (elems->erp_info && elems->erp_info_len >= 1) {
2651 bss->erp_value = elems->erp_info[0];
2652 bss->has_erp_value = 1;
2653 }
2654
2655 if (elems->ht_cap_elem &&
2656 (!bss->ht_ie || bss->ht_ie_len != elems->ht_cap_elem_len ||
2657 memcmp(bss->ht_ie, elems->ht_cap_elem, elems->ht_cap_elem_len))) {
2658 kfree(bss->ht_ie);
2659 bss->ht_ie = kmalloc(elems->ht_cap_elem_len + 2, GFP_ATOMIC);
2660 if (bss->ht_ie) {
2661 memcpy(bss->ht_ie, elems->ht_cap_elem - 2,
2662 elems->ht_cap_elem_len + 2);
2663 bss->ht_ie_len = elems->ht_cap_elem_len + 2;
2664 } else
2665 bss->ht_ie_len = 0;
2666 } else if (!elems->ht_cap_elem && bss->ht_ie) {
2667 kfree(bss->ht_ie);
2668 bss->ht_ie = NULL;
2669 bss->ht_ie_len = 0;
2670 }
2671
2672 if (elems->ht_info_elem &&
2673 (!bss->ht_add_ie ||
2674 bss->ht_add_ie_len != elems->ht_info_elem_len ||
2675 memcmp(bss->ht_add_ie, elems->ht_info_elem,
2676 elems->ht_info_elem_len))) {
2677 kfree(bss->ht_add_ie);
2678 bss->ht_add_ie =
2679 kmalloc(elems->ht_info_elem_len + 2, GFP_ATOMIC);
2680 if (bss->ht_add_ie) {
2681 memcpy(bss->ht_add_ie, elems->ht_info_elem - 2,
2682 elems->ht_info_elem_len + 2);
2683 bss->ht_add_ie_len = elems->ht_info_elem_len + 2;
2684 } else
2685 bss->ht_add_ie_len = 0;
2686 } else if (!elems->ht_info_elem && bss->ht_add_ie) {
2687 kfree(bss->ht_add_ie);
2688 bss->ht_add_ie = NULL;
2689 bss->ht_add_ie_len = 0;
2690 }
2691
2692 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2693 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2694
2695 bss->supp_rates_len = 0;
2696 if (elems->supp_rates) {
2697 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2698 if (clen > elems->supp_rates_len)
2699 clen = elems->supp_rates_len;
2700 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
2701 clen);
2702 bss->supp_rates_len += clen;
2703 }
2704 if (elems->ext_supp_rates) {
2705 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2706 if (clen > elems->ext_supp_rates_len)
2707 clen = elems->ext_supp_rates_len;
2708 memcpy(&bss->supp_rates[bss->supp_rates_len],
2709 elems->ext_supp_rates, clen);
2710 bss->supp_rates_len += clen;
2711 }
2712
2713 bss->band = rx_status->band;
2714
2715 bss->timestamp = beacon_timestamp;
2716 bss->last_update = jiffies;
2717 bss->signal = rx_status->signal;
2718 bss->noise = rx_status->noise;
2719 bss->qual = rx_status->qual;
2720 if (!beacon && !bss->probe_resp)
2721 bss->probe_resp = true;
2722
2723 /*
2724 * In STA mode, the remaining parameters should not be overridden
2725 * by beacons because they're not necessarily accurate there.
2726 */
2727 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2728 bss->probe_resp && beacon) {
2729 ieee80211_rx_bss_put(local, bss);
2730 return;
2731 }
2732
2733 if (elems->wpa &&
2734 (!bss->wpa_ie || bss->wpa_ie_len != elems->wpa_len ||
2735 memcmp(bss->wpa_ie, elems->wpa, elems->wpa_len))) {
2736 kfree(bss->wpa_ie);
2737 bss->wpa_ie = kmalloc(elems->wpa_len + 2, GFP_ATOMIC);
2738 if (bss->wpa_ie) {
2739 memcpy(bss->wpa_ie, elems->wpa - 2, elems->wpa_len + 2);
2740 bss->wpa_ie_len = elems->wpa_len + 2;
2741 } else
2742 bss->wpa_ie_len = 0;
2743 } else if (!elems->wpa && bss->wpa_ie) {
2744 kfree(bss->wpa_ie);
2745 bss->wpa_ie = NULL;
2746 bss->wpa_ie_len = 0;
2747 }
2748
2749 if (elems->rsn &&
2750 (!bss->rsn_ie || bss->rsn_ie_len != elems->rsn_len ||
2751 memcmp(bss->rsn_ie, elems->rsn, elems->rsn_len))) {
2752 kfree(bss->rsn_ie);
2753 bss->rsn_ie = kmalloc(elems->rsn_len + 2, GFP_ATOMIC);
2754 if (bss->rsn_ie) {
2755 memcpy(bss->rsn_ie, elems->rsn - 2, elems->rsn_len + 2);
2756 bss->rsn_ie_len = elems->rsn_len + 2;
2757 } else
2758 bss->rsn_ie_len = 0;
2759 } else if (!elems->rsn && bss->rsn_ie) {
2760 kfree(bss->rsn_ie);
2761 bss->rsn_ie = NULL;
2762 bss->rsn_ie_len = 0;
2763 }
2764
2765 /*
2766 * Cf.
2767 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2768 *
2769 * quoting:
2770 *
2771 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2772 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2773 * Alliance (September 1, 2004) is incorporated by reference herein.
2774 * The inclusion of the WMM Parameters in probe responses and
2775 * association responses is mandatory for WMM enabled networks. The
2776 * inclusion of the WMM Parameters in beacons, however, is optional.
2777 */
2778
2779 if (elems->wmm_param &&
2780 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_param_len ||
2781 memcmp(bss->wmm_ie, elems->wmm_param, elems->wmm_param_len))) {
2782 kfree(bss->wmm_ie);
2783 bss->wmm_ie = kmalloc(elems->wmm_param_len + 2, GFP_ATOMIC);
2784 if (bss->wmm_ie) {
2785 memcpy(bss->wmm_ie, elems->wmm_param - 2,
2786 elems->wmm_param_len + 2);
2787 bss->wmm_ie_len = elems->wmm_param_len + 2;
2788 } else
2789 bss->wmm_ie_len = 0;
2790 } else if (elems->wmm_info &&
2791 (!bss->wmm_ie || bss->wmm_ie_len != elems->wmm_info_len ||
2792 memcmp(bss->wmm_ie, elems->wmm_info,
2793 elems->wmm_info_len))) {
2794 /* As for certain AP's Fifth bit is not set in WMM IE in
2795 * beacon frames.So while parsing the beacon frame the
2796 * wmm_info structure is used instead of wmm_param.
2797 * wmm_info structure was never used to set bss->wmm_ie.
2798 * This code fixes this problem by copying the WME
2799 * information from wmm_info to bss->wmm_ie and enabling
2800 * n-band association.
2801 */
2802 kfree(bss->wmm_ie);
2803 bss->wmm_ie = kmalloc(elems->wmm_info_len + 2, GFP_ATOMIC);
2804 if (bss->wmm_ie) {
2805 memcpy(bss->wmm_ie, elems->wmm_info - 2,
2806 elems->wmm_info_len + 2);
2807 bss->wmm_ie_len = elems->wmm_info_len + 2;
2808 } else
2809 bss->wmm_ie_len = 0;
2810 } else if (!elems->wmm_param && !elems->wmm_info && bss->wmm_ie) {
2811 kfree(bss->wmm_ie);
2812 bss->wmm_ie = NULL;
2813 bss->wmm_ie_len = 0;
2814 }
2815
2816 /* check if we need to merge IBSS */
2817 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2818 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2819 bss->capability & WLAN_CAPABILITY_IBSS &&
2820 bss->freq == local->oper_channel->center_freq &&
2821 elems->ssid_len == sdata->u.sta.ssid_len &&
2822 memcmp(elems->ssid, sdata->u.sta.ssid,
2823 sdata->u.sta.ssid_len) == 0) {
2824 if (rx_status->flag & RX_FLAG_TSFT) {
2825 /* in order for correct IBSS merging we need mactime
2826 *
2827 * since mactime is defined as the time the first data
2828 * symbol of the frame hits the PHY, and the timestamp
2829 * of the beacon is defined as "the time that the data
2830 * symbol containing the first bit of the timestamp is
2831 * transmitted to the PHY plus the transmitting STA’s
2832 * delays through its local PHY from the MAC-PHY
2833 * interface to its interface with the WM"
2834 * (802.11 11.1.2) - equals the time this bit arrives at
2835 * the receiver - we have to take into account the
2836 * offset between the two.
2837 * e.g: at 1 MBit that means mactime is 192 usec earlier
2838 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2839 */
2840 int rate = local->hw.wiphy->bands[rx_status->band]->
2841 bitrates[rx_status->rate_idx].bitrate;
2842 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2843 } else if (local && local->ops && local->ops->get_tsf)
2844 /* second best option: get current TSF */
2845 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2846 else
2847 /* can't merge without knowing the TSF */
2848 rx_timestamp = -1LLU;
2849 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2850 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2851 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2852 print_mac(mac, mgmt->sa),
2853 print_mac(mac2, mgmt->bssid),
2854 (unsigned long long)rx_timestamp,
2855 (unsigned long long)beacon_timestamp,
2856 (unsigned long long)(rx_timestamp - beacon_timestamp),
2857 jiffies);
2858 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2859 if (beacon_timestamp > rx_timestamp) {
2860 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2861 printk(KERN_DEBUG "%s: beacon TSF higher than "
2862 "local TSF - IBSS merge with BSSID %s\n",
2863 dev->name, print_mac(mac, mgmt->bssid));
2864 #endif
2865 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2866 ieee80211_ibss_add_sta(dev, NULL,
2867 mgmt->bssid, mgmt->sa,
2868 BIT(rx_status->rate_idx));
2869 }
2870 }
2871
2872 ieee80211_rx_bss_put(local, bss);
2873 }
2874
2875
2876 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2877 struct ieee80211_mgmt *mgmt,
2878 size_t len,
2879 struct ieee80211_rx_status *rx_status)
2880 {
2881 size_t baselen;
2882 struct ieee802_11_elems elems;
2883
2884 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2885 if (baselen > len)
2886 return;
2887
2888 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2889 &elems);
2890
2891 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 0);
2892 }
2893
2894
2895 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2896 struct ieee80211_mgmt *mgmt,
2897 size_t len,
2898 struct ieee80211_rx_status *rx_status)
2899 {
2900 struct ieee80211_sub_if_data *sdata;
2901 struct ieee80211_if_sta *ifsta;
2902 size_t baselen;
2903 struct ieee802_11_elems elems;
2904 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2905 struct ieee80211_conf *conf = &local->hw.conf;
2906 u32 changed = 0;
2907
2908 /* Process beacon from the current BSS */
2909 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2910 if (baselen > len)
2911 return;
2912
2913 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2914
2915 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, &elems, 1);
2916
2917 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2918 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2919 return;
2920 ifsta = &sdata->u.sta;
2921
2922 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2923 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2924 return;
2925
2926 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2927 elems.wmm_param_len);
2928
2929 /* Do not send changes to driver if we are scanning. This removes
2930 * requirement that driver's bss_info_changed function needs to be
2931 * atomic. */
2932 if (local->sta_sw_scanning || local->sta_hw_scanning)
2933 return;
2934
2935 if (elems.erp_info && elems.erp_info_len >= 1)
2936 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2937 else {
2938 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2939 changed |= ieee80211_handle_protect_preamb(sdata, false,
2940 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2941 }
2942
2943 if (elems.ht_cap_elem && elems.ht_info_elem &&
2944 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2945 struct ieee80211_ht_bss_info bss_info;
2946
2947 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2948 (struct ieee80211_ht_addt_info *)
2949 elems.ht_info_elem, &bss_info);
2950 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2951 &bss_info);
2952 }
2953
2954 ieee80211_bss_info_change_notify(sdata, changed);
2955 }
2956
2957
2958 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2959 struct ieee80211_if_sta *ifsta,
2960 struct ieee80211_mgmt *mgmt,
2961 size_t len,
2962 struct ieee80211_rx_status *rx_status)
2963 {
2964 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2965 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2966 int tx_last_beacon;
2967 struct sk_buff *skb;
2968 struct ieee80211_mgmt *resp;
2969 u8 *pos, *end;
2970 DECLARE_MAC_BUF(mac);
2971 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2972 DECLARE_MAC_BUF(mac2);
2973 DECLARE_MAC_BUF(mac3);
2974 #endif
2975
2976 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2977 ifsta->state != IEEE80211_IBSS_JOINED ||
2978 len < 24 + 2 || !ifsta->probe_resp)
2979 return;
2980
2981 if (local->ops->tx_last_beacon)
2982 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2983 else
2984 tx_last_beacon = 1;
2985
2986 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2987 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2988 "%s (tx_last_beacon=%d)\n",
2989 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2990 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2991 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2992
2993 if (!tx_last_beacon)
2994 return;
2995
2996 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2997 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2998 return;
2999
3000 end = ((u8 *) mgmt) + len;
3001 pos = mgmt->u.probe_req.variable;
3002 if (pos[0] != WLAN_EID_SSID ||
3003 pos + 2 + pos[1] > end) {
3004 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3005 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
3006 "from %s\n",
3007 dev->name, print_mac(mac, mgmt->sa));
3008 #endif
3009 return;
3010 }
3011 if (pos[1] != 0 &&
3012 (pos[1] != ifsta->ssid_len ||
3013 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
3014 /* Ignore ProbeReq for foreign SSID */
3015 return;
3016 }
3017
3018 /* Reply with ProbeResp */
3019 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
3020 if (!skb)
3021 return;
3022
3023 resp = (struct ieee80211_mgmt *) skb->data;
3024 memcpy(resp->da, mgmt->sa, ETH_ALEN);
3025 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3026 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
3027 dev->name, print_mac(mac, resp->da));
3028 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3029 ieee80211_sta_tx(dev, skb, 0);
3030 }
3031
3032 static void ieee80211_rx_mgmt_action(struct net_device *dev,
3033 struct ieee80211_if_sta *ifsta,
3034 struct ieee80211_mgmt *mgmt,
3035 size_t len,
3036 struct ieee80211_rx_status *rx_status)
3037 {
3038 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3039 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3040
3041 if (len < IEEE80211_MIN_ACTION_SIZE)
3042 return;
3043
3044 switch (mgmt->u.action.category) {
3045 case WLAN_CATEGORY_SPECTRUM_MGMT:
3046 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
3047 break;
3048 switch (mgmt->u.action.u.chan_switch.action_code) {
3049 case WLAN_ACTION_SPCT_MSR_REQ:
3050 if (len < (IEEE80211_MIN_ACTION_SIZE +
3051 sizeof(mgmt->u.action.u.measurement)))
3052 break;
3053 ieee80211_sta_process_measurement_req(dev, mgmt, len);
3054 break;
3055 }
3056 break;
3057 case WLAN_CATEGORY_BACK:
3058 switch (mgmt->u.action.u.addba_req.action_code) {
3059 case WLAN_ACTION_ADDBA_REQ:
3060 if (len < (IEEE80211_MIN_ACTION_SIZE +
3061 sizeof(mgmt->u.action.u.addba_req)))
3062 break;
3063 ieee80211_sta_process_addba_request(dev, mgmt, len);
3064 break;
3065 case WLAN_ACTION_ADDBA_RESP:
3066 if (len < (IEEE80211_MIN_ACTION_SIZE +
3067 sizeof(mgmt->u.action.u.addba_resp)))
3068 break;
3069 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3070 break;
3071 case WLAN_ACTION_DELBA:
3072 if (len < (IEEE80211_MIN_ACTION_SIZE +
3073 sizeof(mgmt->u.action.u.delba)))
3074 break;
3075 ieee80211_sta_process_delba(dev, mgmt, len);
3076 break;
3077 }
3078 break;
3079 case PLINK_CATEGORY:
3080 if (ieee80211_vif_is_mesh(&sdata->vif))
3081 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3082 break;
3083 case MESH_PATH_SEL_CATEGORY:
3084 if (ieee80211_vif_is_mesh(&sdata->vif))
3085 mesh_rx_path_sel_frame(dev, mgmt, len);
3086 break;
3087 }
3088 }
3089
3090 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3091 struct ieee80211_rx_status *rx_status)
3092 {
3093 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3094 struct ieee80211_sub_if_data *sdata;
3095 struct ieee80211_if_sta *ifsta;
3096 struct ieee80211_mgmt *mgmt;
3097 u16 fc;
3098
3099 if (skb->len < 24)
3100 goto fail;
3101
3102 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3103 ifsta = &sdata->u.sta;
3104
3105 mgmt = (struct ieee80211_mgmt *) skb->data;
3106 fc = le16_to_cpu(mgmt->frame_control);
3107
3108 switch (fc & IEEE80211_FCTL_STYPE) {
3109 case IEEE80211_STYPE_PROBE_REQ:
3110 case IEEE80211_STYPE_PROBE_RESP:
3111 case IEEE80211_STYPE_BEACON:
3112 case IEEE80211_STYPE_ACTION:
3113 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3114 case IEEE80211_STYPE_AUTH:
3115 case IEEE80211_STYPE_ASSOC_RESP:
3116 case IEEE80211_STYPE_REASSOC_RESP:
3117 case IEEE80211_STYPE_DEAUTH:
3118 case IEEE80211_STYPE_DISASSOC:
3119 skb_queue_tail(&ifsta->skb_queue, skb);
3120 queue_work(local->hw.workqueue, &ifsta->work);
3121 return;
3122 }
3123
3124 fail:
3125 kfree_skb(skb);
3126 }
3127
3128
3129 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3130 struct sk_buff *skb)
3131 {
3132 struct ieee80211_rx_status *rx_status;
3133 struct ieee80211_sub_if_data *sdata;
3134 struct ieee80211_if_sta *ifsta;
3135 struct ieee80211_mgmt *mgmt;
3136 u16 fc;
3137
3138 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3139 ifsta = &sdata->u.sta;
3140
3141 rx_status = (struct ieee80211_rx_status *) skb->cb;
3142 mgmt = (struct ieee80211_mgmt *) skb->data;
3143 fc = le16_to_cpu(mgmt->frame_control);
3144
3145 switch (fc & IEEE80211_FCTL_STYPE) {
3146 case IEEE80211_STYPE_PROBE_REQ:
3147 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3148 rx_status);
3149 break;
3150 case IEEE80211_STYPE_PROBE_RESP:
3151 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3152 break;
3153 case IEEE80211_STYPE_BEACON:
3154 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3155 break;
3156 case IEEE80211_STYPE_AUTH:
3157 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3158 break;
3159 case IEEE80211_STYPE_ASSOC_RESP:
3160 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3161 break;
3162 case IEEE80211_STYPE_REASSOC_RESP:
3163 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3164 break;
3165 case IEEE80211_STYPE_DEAUTH:
3166 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3167 break;
3168 case IEEE80211_STYPE_DISASSOC:
3169 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3170 break;
3171 case IEEE80211_STYPE_ACTION:
3172 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3173 break;
3174 }
3175
3176 kfree_skb(skb);
3177 }
3178
3179
3180 ieee80211_rx_result
3181 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3182 struct ieee80211_rx_status *rx_status)
3183 {
3184 struct ieee80211_mgmt *mgmt;
3185 __le16 fc;
3186
3187 if (skb->len < 2)
3188 return RX_DROP_UNUSABLE;
3189
3190 mgmt = (struct ieee80211_mgmt *) skb->data;
3191 fc = mgmt->frame_control;
3192
3193 if (ieee80211_is_ctl(fc))
3194 return RX_CONTINUE;
3195
3196 if (skb->len < 24)
3197 return RX_DROP_MONITOR;
3198
3199 if (ieee80211_is_probe_resp(fc)) {
3200 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3201 dev_kfree_skb(skb);
3202 return RX_QUEUED;
3203 }
3204
3205 if (ieee80211_is_beacon(fc)) {
3206 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3207 dev_kfree_skb(skb);
3208 return RX_QUEUED;
3209 }
3210
3211 return RX_CONTINUE;
3212 }
3213
3214
3215 static int ieee80211_sta_active_ibss(struct net_device *dev)
3216 {
3217 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3218 int active = 0;
3219 struct sta_info *sta;
3220 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3221
3222 rcu_read_lock();
3223
3224 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3225 if (sta->sdata == sdata &&
3226 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3227 jiffies)) {
3228 active++;
3229 break;
3230 }
3231 }
3232
3233 rcu_read_unlock();
3234
3235 return active;
3236 }
3237
3238
3239 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3240 {
3241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3242 struct sta_info *sta, *tmp;
3243 LIST_HEAD(tmp_list);
3244 DECLARE_MAC_BUF(mac);
3245 unsigned long flags;
3246
3247 spin_lock_irqsave(&local->sta_lock, flags);
3248 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3249 if (time_after(jiffies, sta->last_rx + exp_time)) {
3250 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3251 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3252 dev->name, print_mac(mac, sta->addr));
3253 #endif
3254 __sta_info_unlink(&sta);
3255 if (sta)
3256 list_add(&sta->list, &tmp_list);
3257 }
3258 spin_unlock_irqrestore(&local->sta_lock, flags);
3259
3260 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3261 sta_info_destroy(sta);
3262 }
3263
3264
3265 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3266 struct ieee80211_if_sta *ifsta)
3267 {
3268 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3269
3270 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3271 if (ieee80211_sta_active_ibss(dev))
3272 return;
3273
3274 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3275 "IBSS networks with same SSID (merge)\n", dev->name);
3276 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3277 }
3278
3279
3280 #ifdef CONFIG_MAC80211_MESH
3281 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3282 struct ieee80211_if_sta *ifsta)
3283 {
3284 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3285 bool free_plinks;
3286
3287 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3288 mesh_path_expire(dev);
3289
3290 free_plinks = mesh_plink_availables(sdata);
3291 if (free_plinks != sdata->u.sta.accepting_plinks)
3292 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
3293
3294 mod_timer(&ifsta->timer, jiffies +
3295 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3296 }
3297
3298
3299 void ieee80211_start_mesh(struct net_device *dev)
3300 {
3301 struct ieee80211_if_sta *ifsta;
3302 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3303 ifsta = &sdata->u.sta;
3304 ifsta->state = IEEE80211_MESH_UP;
3305 ieee80211_sta_timer((unsigned long)sdata);
3306 }
3307 #endif
3308
3309
3310 void ieee80211_sta_timer(unsigned long data)
3311 {
3312 struct ieee80211_sub_if_data *sdata =
3313 (struct ieee80211_sub_if_data *) data;
3314 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3315 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3316
3317 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3318 queue_work(local->hw.workqueue, &ifsta->work);
3319 }
3320
3321 void ieee80211_sta_work(struct work_struct *work)
3322 {
3323 struct ieee80211_sub_if_data *sdata =
3324 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3325 struct net_device *dev = sdata->dev;
3326 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3327 struct ieee80211_if_sta *ifsta;
3328 struct sk_buff *skb;
3329
3330 if (!netif_running(dev))
3331 return;
3332
3333 if (local->sta_sw_scanning || local->sta_hw_scanning)
3334 return;
3335
3336 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3337 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3338 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3339 return;
3340 ifsta = &sdata->u.sta;
3341
3342 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3343 ieee80211_sta_rx_queued_mgmt(dev, skb);
3344
3345 #ifdef CONFIG_MAC80211_MESH
3346 if (ifsta->preq_queue_len &&
3347 time_after(jiffies,
3348 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3349 mesh_path_start_discovery(dev);
3350 #endif
3351
3352 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3353 ifsta->state != IEEE80211_ASSOCIATE &&
3354 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3355 if (ifsta->scan_ssid_len)
3356 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3357 else
3358 ieee80211_sta_start_scan(dev, NULL, 0);
3359 return;
3360 }
3361
3362 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3363 if (ieee80211_sta_config_auth(dev, ifsta))
3364 return;
3365 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3366 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3367 return;
3368
3369 switch (ifsta->state) {
3370 case IEEE80211_DISABLED:
3371 break;
3372 case IEEE80211_AUTHENTICATE:
3373 ieee80211_authenticate(dev, ifsta);
3374 break;
3375 case IEEE80211_ASSOCIATE:
3376 ieee80211_associate(dev, ifsta);
3377 break;
3378 case IEEE80211_ASSOCIATED:
3379 ieee80211_associated(dev, ifsta);
3380 break;
3381 case IEEE80211_IBSS_SEARCH:
3382 ieee80211_sta_find_ibss(dev, ifsta);
3383 break;
3384 case IEEE80211_IBSS_JOINED:
3385 ieee80211_sta_merge_ibss(dev, ifsta);
3386 break;
3387 #ifdef CONFIG_MAC80211_MESH
3388 case IEEE80211_MESH_UP:
3389 ieee80211_mesh_housekeeping(dev, ifsta);
3390 break;
3391 #endif
3392 default:
3393 WARN_ON(1);
3394 break;
3395 }
3396
3397 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3398 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3399 "mixed-cell disabled - disassociate\n", dev->name);
3400
3401 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3402 ieee80211_set_disassoc(dev, ifsta, 0);
3403 }
3404 }
3405
3406
3407 static void ieee80211_sta_reset_auth(struct net_device *dev,
3408 struct ieee80211_if_sta *ifsta)
3409 {
3410 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3411
3412 if (local->ops->reset_tsf) {
3413 /* Reset own TSF to allow time synchronization work. */
3414 local->ops->reset_tsf(local_to_hw(local));
3415 }
3416
3417 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3418
3419
3420 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3421 ifsta->auth_alg = WLAN_AUTH_OPEN;
3422 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3423 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3424 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3425 ifsta->auth_alg = WLAN_AUTH_LEAP;
3426 else
3427 ifsta->auth_alg = WLAN_AUTH_OPEN;
3428 ifsta->auth_transaction = -1;
3429 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3430 ifsta->auth_tries = ifsta->assoc_tries = 0;
3431 netif_carrier_off(dev);
3432 }
3433
3434
3435 void ieee80211_sta_req_auth(struct net_device *dev,
3436 struct ieee80211_if_sta *ifsta)
3437 {
3438 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3439 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3440
3441 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3442 return;
3443
3444 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3445 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3446 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3447 IEEE80211_STA_AUTO_SSID_SEL))) {
3448 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3449 queue_work(local->hw.workqueue, &ifsta->work);
3450 }
3451 }
3452
3453 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3454 const char *ssid, int ssid_len)
3455 {
3456 int tmp, hidden_ssid;
3457
3458 if (ssid_len == ifsta->ssid_len &&
3459 !memcmp(ifsta->ssid, ssid, ssid_len))
3460 return 1;
3461
3462 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3463 return 0;
3464
3465 hidden_ssid = 1;
3466 tmp = ssid_len;
3467 while (tmp--) {
3468 if (ssid[tmp] != '\0') {
3469 hidden_ssid = 0;
3470 break;
3471 }
3472 }
3473
3474 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3475 return 1;
3476
3477 if (ssid_len == 1 && ssid[0] == ' ')
3478 return 1;
3479
3480 return 0;
3481 }
3482
3483 static int ieee80211_sta_config_auth(struct net_device *dev,
3484 struct ieee80211_if_sta *ifsta)
3485 {
3486 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3487 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3488 struct ieee80211_sta_bss *bss, *selected = NULL;
3489 int top_rssi = 0, freq;
3490
3491 spin_lock_bh(&local->sta_bss_lock);
3492 freq = local->oper_channel->center_freq;
3493 list_for_each_entry(bss, &local->sta_bss_list, list) {
3494 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3495 continue;
3496
3497 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3498 IEEE80211_STA_AUTO_BSSID_SEL |
3499 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3500 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3501 !!sdata->default_key))
3502 continue;
3503
3504 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3505 bss->freq != freq)
3506 continue;
3507
3508 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3509 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3510 continue;
3511
3512 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3513 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3514 continue;
3515
3516 if (!selected || top_rssi < bss->signal) {
3517 selected = bss;
3518 top_rssi = bss->signal;
3519 }
3520 }
3521 if (selected)
3522 atomic_inc(&selected->users);
3523 spin_unlock_bh(&local->sta_bss_lock);
3524
3525 if (selected) {
3526 ieee80211_set_freq(dev, selected->freq);
3527 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3528 ieee80211_sta_set_ssid(dev, selected->ssid,
3529 selected->ssid_len);
3530 ieee80211_sta_set_bssid(dev, selected->bssid);
3531 ieee80211_sta_def_wmm_params(dev, selected, 0);
3532 ieee80211_rx_bss_put(local, selected);
3533 ifsta->state = IEEE80211_AUTHENTICATE;
3534 ieee80211_sta_reset_auth(dev, ifsta);
3535 return 0;
3536 } else {
3537 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3538 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3539 ieee80211_sta_start_scan(dev, NULL, 0);
3540 else
3541 ieee80211_sta_start_scan(dev, ifsta->ssid,
3542 ifsta->ssid_len);
3543 ifsta->state = IEEE80211_AUTHENTICATE;
3544 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3545 } else
3546 ifsta->state = IEEE80211_DISABLED;
3547 }
3548 return -1;
3549 }
3550
3551
3552 static int ieee80211_sta_create_ibss(struct net_device *dev,
3553 struct ieee80211_if_sta *ifsta)
3554 {
3555 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3556 struct ieee80211_sta_bss *bss;
3557 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3558 struct ieee80211_supported_band *sband;
3559 u8 bssid[ETH_ALEN], *pos;
3560 int i;
3561 int ret;
3562 DECLARE_MAC_BUF(mac);
3563
3564 #if 0
3565 /* Easier testing, use fixed BSSID. */
3566 memset(bssid, 0xfe, ETH_ALEN);
3567 #else
3568 /* Generate random, not broadcast, locally administered BSSID. Mix in
3569 * own MAC address to make sure that devices that do not have proper
3570 * random number generator get different BSSID. */
3571 get_random_bytes(bssid, ETH_ALEN);
3572 for (i = 0; i < ETH_ALEN; i++)
3573 bssid[i] ^= dev->dev_addr[i];
3574 bssid[0] &= ~0x01;
3575 bssid[0] |= 0x02;
3576 #endif
3577
3578 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3579 dev->name, print_mac(mac, bssid));
3580
3581 bss = ieee80211_rx_bss_add(dev, bssid,
3582 local->hw.conf.channel->center_freq,
3583 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3584 if (!bss)
3585 return -ENOMEM;
3586
3587 bss->band = local->hw.conf.channel->band;
3588 sband = local->hw.wiphy->bands[bss->band];
3589
3590 if (local->hw.conf.beacon_int == 0)
3591 local->hw.conf.beacon_int = 100;
3592 bss->beacon_int = local->hw.conf.beacon_int;
3593 bss->last_update = jiffies;
3594 bss->capability = WLAN_CAPABILITY_IBSS;
3595
3596 if (sdata->default_key)
3597 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3598 else
3599 sdata->drop_unencrypted = 0;
3600
3601 bss->supp_rates_len = sband->n_bitrates;
3602 pos = bss->supp_rates;
3603 for (i = 0; i < sband->n_bitrates; i++) {
3604 int rate = sband->bitrates[i].bitrate;
3605 *pos++ = (u8) (rate / 5);
3606 }
3607
3608 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3609 ieee80211_rx_bss_put(local, bss);
3610 return ret;
3611 }
3612
3613
3614 static int ieee80211_sta_find_ibss(struct net_device *dev,
3615 struct ieee80211_if_sta *ifsta)
3616 {
3617 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3618 struct ieee80211_sta_bss *bss;
3619 int found = 0;
3620 u8 bssid[ETH_ALEN];
3621 int active_ibss;
3622 DECLARE_MAC_BUF(mac);
3623 DECLARE_MAC_BUF(mac2);
3624
3625 if (ifsta->ssid_len == 0)
3626 return -EINVAL;
3627
3628 active_ibss = ieee80211_sta_active_ibss(dev);
3629 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3630 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3631 dev->name, active_ibss);
3632 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3633 spin_lock_bh(&local->sta_bss_lock);
3634 list_for_each_entry(bss, &local->sta_bss_list, list) {
3635 if (ifsta->ssid_len != bss->ssid_len ||
3636 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3637 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3638 continue;
3639 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3640 printk(KERN_DEBUG " bssid=%s found\n",
3641 print_mac(mac, bss->bssid));
3642 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3643 memcpy(bssid, bss->bssid, ETH_ALEN);
3644 found = 1;
3645 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3646 break;
3647 }
3648 spin_unlock_bh(&local->sta_bss_lock);
3649
3650 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3651 if (found)
3652 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3653 "%s\n", print_mac(mac, bssid),
3654 print_mac(mac2, ifsta->bssid));
3655 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3656 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3657 (bss = ieee80211_rx_bss_get(dev, bssid,
3658 local->hw.conf.channel->center_freq,
3659 ifsta->ssid, ifsta->ssid_len))) {
3660 int ret;
3661 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3662 " based on configured SSID\n",
3663 dev->name, print_mac(mac, bssid));
3664 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3665 ieee80211_rx_bss_put(local, bss);
3666 return ret;
3667 }
3668 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3669 printk(KERN_DEBUG " did not try to join ibss\n");
3670 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3671
3672 /* Selected IBSS not found in current scan results - try to scan */
3673 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3674 !ieee80211_sta_active_ibss(dev)) {
3675 mod_timer(&ifsta->timer, jiffies +
3676 IEEE80211_IBSS_MERGE_INTERVAL);
3677 } else if (time_after(jiffies, local->last_scan_completed +
3678 IEEE80211_SCAN_INTERVAL)) {
3679 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3680 "join\n", dev->name);
3681 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3682 ifsta->ssid_len);
3683 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3684 int interval = IEEE80211_SCAN_INTERVAL;
3685
3686 if (time_after(jiffies, ifsta->ibss_join_req +
3687 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3688 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3689 (!(local->oper_channel->flags &
3690 IEEE80211_CHAN_NO_IBSS)))
3691 return ieee80211_sta_create_ibss(dev, ifsta);
3692 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3693 printk(KERN_DEBUG "%s: IBSS not allowed on"
3694 " %d MHz\n", dev->name,
3695 local->hw.conf.channel->center_freq);
3696 }
3697
3698 /* No IBSS found - decrease scan interval and continue
3699 * scanning. */
3700 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3701 }
3702
3703 ifsta->state = IEEE80211_IBSS_SEARCH;
3704 mod_timer(&ifsta->timer, jiffies + interval);
3705 return 0;
3706 }
3707
3708 return 0;
3709 }
3710
3711
3712 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3713 {
3714 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3715 struct ieee80211_if_sta *ifsta;
3716 int res;
3717
3718 if (len > IEEE80211_MAX_SSID_LEN)
3719 return -EINVAL;
3720
3721 ifsta = &sdata->u.sta;
3722
3723 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3724 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3725 memcpy(ifsta->ssid, ssid, len);
3726 ifsta->ssid_len = len;
3727 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3728
3729 res = 0;
3730 /*
3731 * Hack! MLME code needs to be cleaned up to have different
3732 * entry points for configuration and internal selection change
3733 */
3734 if (netif_running(sdata->dev))
3735 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3736 if (res) {
3737 printk(KERN_DEBUG "%s: Failed to config new SSID to "
3738 "the low-level driver\n", dev->name);
3739 return res;
3740 }
3741 }
3742
3743 if (len)
3744 ifsta->flags |= IEEE80211_STA_SSID_SET;
3745 else
3746 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3747
3748 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3749 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3750 ifsta->ibss_join_req = jiffies;
3751 ifsta->state = IEEE80211_IBSS_SEARCH;
3752 return ieee80211_sta_find_ibss(dev, ifsta);
3753 }
3754
3755 return 0;
3756 }
3757
3758
3759 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3760 {
3761 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3762 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3763 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3764 *len = ifsta->ssid_len;
3765 return 0;
3766 }
3767
3768
3769 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3770 {
3771 struct ieee80211_sub_if_data *sdata;
3772 struct ieee80211_if_sta *ifsta;
3773 int res;
3774
3775 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3776 ifsta = &sdata->u.sta;
3777
3778 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3779 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3780 res = 0;
3781 /*
3782 * Hack! See also ieee80211_sta_set_ssid.
3783 */
3784 if (netif_running(sdata->dev))
3785 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
3786 if (res) {
3787 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3788 "the low-level driver\n", dev->name);
3789 return res;
3790 }
3791 }
3792
3793 if (is_valid_ether_addr(bssid))
3794 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3795 else
3796 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3797
3798 return 0;
3799 }
3800
3801
3802 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3803 struct ieee80211_sub_if_data *sdata,
3804 int powersave)
3805 {
3806 struct sk_buff *skb;
3807 struct ieee80211_hdr *nullfunc;
3808 __le16 fc;
3809
3810 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3811 if (!skb) {
3812 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3813 "frame\n", sdata->dev->name);
3814 return;
3815 }
3816 skb_reserve(skb, local->hw.extra_tx_headroom);
3817
3818 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3819 memset(nullfunc, 0, 24);
3820 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3821 IEEE80211_FCTL_TODS);
3822 if (powersave)
3823 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
3824 nullfunc->frame_control = fc;
3825 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3826 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3827 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3828
3829 ieee80211_sta_tx(sdata->dev, skb, 0);
3830 }
3831
3832
3833 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3834 {
3835 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3836 ieee80211_vif_is_mesh(&sdata->vif))
3837 ieee80211_sta_timer((unsigned long)sdata);
3838 }
3839
3840 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3841 {
3842 struct ieee80211_local *local = hw_to_local(hw);
3843 struct net_device *dev = local->scan_dev;
3844 struct ieee80211_sub_if_data *sdata;
3845 union iwreq_data wrqu;
3846
3847 local->last_scan_completed = jiffies;
3848 memset(&wrqu, 0, sizeof(wrqu));
3849 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3850
3851 if (local->sta_hw_scanning) {
3852 local->sta_hw_scanning = 0;
3853 if (ieee80211_hw_config(local))
3854 printk(KERN_DEBUG "%s: failed to restore operational "
3855 "channel after scan\n", dev->name);
3856 /* Restart STA timer for HW scan case */
3857 rcu_read_lock();
3858 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3859 ieee80211_restart_sta_timer(sdata);
3860 rcu_read_unlock();
3861
3862 goto done;
3863 }
3864
3865 local->sta_sw_scanning = 0;
3866 if (ieee80211_hw_config(local))
3867 printk(KERN_DEBUG "%s: failed to restore operational "
3868 "channel after scan\n", dev->name);
3869
3870
3871 netif_tx_lock_bh(local->mdev);
3872 netif_addr_lock(local->mdev);
3873 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3874 local->ops->configure_filter(local_to_hw(local),
3875 FIF_BCN_PRBRESP_PROMISC,
3876 &local->filter_flags,
3877 local->mdev->mc_count,
3878 local->mdev->mc_list);
3879
3880 netif_addr_unlock(local->mdev);
3881 netif_tx_unlock_bh(local->mdev);
3882
3883 rcu_read_lock();
3884 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3885 /* Tell AP we're back */
3886 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3887 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3888 ieee80211_send_nullfunc(local, sdata, 0);
3889
3890 ieee80211_restart_sta_timer(sdata);
3891
3892 netif_wake_queue(sdata->dev);
3893 }
3894 rcu_read_unlock();
3895
3896 done:
3897 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3898 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3899 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3900 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3901 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3902 !ieee80211_sta_active_ibss(dev)))
3903 ieee80211_sta_find_ibss(dev, ifsta);
3904 }
3905 }
3906 EXPORT_SYMBOL(ieee80211_scan_completed);
3907
3908 void ieee80211_sta_scan_work(struct work_struct *work)
3909 {
3910 struct ieee80211_local *local =
3911 container_of(work, struct ieee80211_local, scan_work.work);
3912 struct net_device *dev = local->scan_dev;
3913 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3914 struct ieee80211_supported_band *sband;
3915 struct ieee80211_channel *chan;
3916 int skip;
3917 unsigned long next_delay = 0;
3918
3919 if (!local->sta_sw_scanning)
3920 return;
3921
3922 switch (local->scan_state) {
3923 case SCAN_SET_CHANNEL:
3924 /*
3925 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3926 * after we successfully scanned the last channel of the last
3927 * band (and the last band is supported by the hw)
3928 */
3929 if (local->scan_band < IEEE80211_NUM_BANDS)
3930 sband = local->hw.wiphy->bands[local->scan_band];
3931 else
3932 sband = NULL;
3933
3934 /*
3935 * If we are at an unsupported band and have more bands
3936 * left to scan, advance to the next supported one.
3937 */
3938 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3939 local->scan_band++;
3940 sband = local->hw.wiphy->bands[local->scan_band];
3941 local->scan_channel_idx = 0;
3942 }
3943
3944 /* if no more bands/channels left, complete scan */
3945 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3946 ieee80211_scan_completed(local_to_hw(local));
3947 return;
3948 }
3949 skip = 0;
3950 chan = &sband->channels[local->scan_channel_idx];
3951
3952 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3953 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3954 chan->flags & IEEE80211_CHAN_NO_IBSS))
3955 skip = 1;
3956
3957 if (!skip) {
3958 local->scan_channel = chan;
3959 if (ieee80211_hw_config(local)) {
3960 printk(KERN_DEBUG "%s: failed to set freq to "
3961 "%d MHz for scan\n", dev->name,
3962 chan->center_freq);
3963 skip = 1;
3964 }
3965 }
3966
3967 /* advance state machine to next channel/band */
3968 local->scan_channel_idx++;
3969 if (local->scan_channel_idx >= sband->n_channels) {
3970 /*
3971 * scan_band may end up == IEEE80211_NUM_BANDS, but
3972 * we'll catch that case above and complete the scan
3973 * if that is the case.
3974 */
3975 local->scan_band++;
3976 local->scan_channel_idx = 0;
3977 }
3978
3979 if (skip)
3980 break;
3981
3982 next_delay = IEEE80211_PROBE_DELAY +
3983 usecs_to_jiffies(local->hw.channel_change_time);
3984 local->scan_state = SCAN_SEND_PROBE;
3985 break;
3986 case SCAN_SEND_PROBE:
3987 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3988 local->scan_state = SCAN_SET_CHANNEL;
3989
3990 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3991 break;
3992 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3993 local->scan_ssid_len);
3994 next_delay = IEEE80211_CHANNEL_TIME;
3995 break;
3996 }
3997
3998 if (local->sta_sw_scanning)
3999 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4000 next_delay);
4001 }
4002
4003
4004 static int ieee80211_sta_start_scan(struct net_device *dev,
4005 u8 *ssid, size_t ssid_len)
4006 {
4007 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4008 struct ieee80211_sub_if_data *sdata;
4009
4010 if (ssid_len > IEEE80211_MAX_SSID_LEN)
4011 return -EINVAL;
4012
4013 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
4014 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
4015 * BSSID: MACAddress
4016 * SSID
4017 * ScanType: ACTIVE, PASSIVE
4018 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
4019 * a Probe frame during active scanning
4020 * ChannelList
4021 * MinChannelTime (>= ProbeDelay), in TU
4022 * MaxChannelTime: (>= MinChannelTime), in TU
4023 */
4024
4025 /* MLME-SCAN.confirm
4026 * BSSDescriptionSet
4027 * ResultCode: SUCCESS, INVALID_PARAMETERS
4028 */
4029
4030 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4031 if (local->scan_dev == dev)
4032 return 0;
4033 return -EBUSY;
4034 }
4035
4036 if (local->ops->hw_scan) {
4037 int rc = local->ops->hw_scan(local_to_hw(local),
4038 ssid, ssid_len);
4039 if (!rc) {
4040 local->sta_hw_scanning = 1;
4041 local->scan_dev = dev;
4042 }
4043 return rc;
4044 }
4045
4046 local->sta_sw_scanning = 1;
4047
4048 rcu_read_lock();
4049 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4050 netif_stop_queue(sdata->dev);
4051 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4052 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4053 ieee80211_send_nullfunc(local, sdata, 1);
4054 }
4055 rcu_read_unlock();
4056
4057 if (ssid) {
4058 local->scan_ssid_len = ssid_len;
4059 memcpy(local->scan_ssid, ssid, ssid_len);
4060 } else
4061 local->scan_ssid_len = 0;
4062 local->scan_state = SCAN_SET_CHANNEL;
4063 local->scan_channel_idx = 0;
4064 local->scan_band = IEEE80211_BAND_2GHZ;
4065 local->scan_dev = dev;
4066
4067 netif_addr_lock_bh(local->mdev);
4068 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4069 local->ops->configure_filter(local_to_hw(local),
4070 FIF_BCN_PRBRESP_PROMISC,
4071 &local->filter_flags,
4072 local->mdev->mc_count,
4073 local->mdev->mc_list);
4074 netif_addr_unlock_bh(local->mdev);
4075
4076 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4077 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4078 IEEE80211_CHANNEL_TIME);
4079
4080 return 0;
4081 }
4082
4083
4084 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4085 {
4086 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4087 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4088 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4089
4090 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4091 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4092
4093 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4094 if (local->scan_dev == dev)
4095 return 0;
4096 return -EBUSY;
4097 }
4098
4099 ifsta->scan_ssid_len = ssid_len;
4100 if (ssid_len)
4101 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4102 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4103 queue_work(local->hw.workqueue, &ifsta->work);
4104 return 0;
4105 }
4106
4107 static char *
4108 ieee80211_sta_scan_result(struct net_device *dev,
4109 struct iw_request_info *info,
4110 struct ieee80211_sta_bss *bss,
4111 char *current_ev, char *end_buf)
4112 {
4113 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4114 struct iw_event iwe;
4115
4116 if (time_after(jiffies,
4117 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4118 return current_ev;
4119
4120 memset(&iwe, 0, sizeof(iwe));
4121 iwe.cmd = SIOCGIWAP;
4122 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4123 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4124 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4125 IW_EV_ADDR_LEN);
4126
4127 memset(&iwe, 0, sizeof(iwe));
4128 iwe.cmd = SIOCGIWESSID;
4129 if (bss_mesh_cfg(bss)) {
4130 iwe.u.data.length = bss_mesh_id_len(bss);
4131 iwe.u.data.flags = 1;
4132 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4133 &iwe, bss_mesh_id(bss));
4134 } else {
4135 iwe.u.data.length = bss->ssid_len;
4136 iwe.u.data.flags = 1;
4137 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4138 &iwe, bss->ssid);
4139 }
4140
4141 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4142 || bss_mesh_cfg(bss)) {
4143 memset(&iwe, 0, sizeof(iwe));
4144 iwe.cmd = SIOCGIWMODE;
4145 if (bss_mesh_cfg(bss))
4146 iwe.u.mode = IW_MODE_MESH;
4147 else if (bss->capability & WLAN_CAPABILITY_ESS)
4148 iwe.u.mode = IW_MODE_MASTER;
4149 else
4150 iwe.u.mode = IW_MODE_ADHOC;
4151 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
4152 &iwe, IW_EV_UINT_LEN);
4153 }
4154
4155 memset(&iwe, 0, sizeof(iwe));
4156 iwe.cmd = SIOCGIWFREQ;
4157 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4158 iwe.u.freq.e = 0;
4159 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4160 IW_EV_FREQ_LEN);
4161
4162 memset(&iwe, 0, sizeof(iwe));
4163 iwe.cmd = SIOCGIWFREQ;
4164 iwe.u.freq.m = bss->freq;
4165 iwe.u.freq.e = 6;
4166 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4167 IW_EV_FREQ_LEN);
4168 memset(&iwe, 0, sizeof(iwe));
4169 iwe.cmd = IWEVQUAL;
4170 iwe.u.qual.qual = bss->qual;
4171 iwe.u.qual.level = bss->signal;
4172 iwe.u.qual.noise = bss->noise;
4173 iwe.u.qual.updated = local->wstats_flags;
4174 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
4175 IW_EV_QUAL_LEN);
4176
4177 memset(&iwe, 0, sizeof(iwe));
4178 iwe.cmd = SIOCGIWENCODE;
4179 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4180 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4181 else
4182 iwe.u.data.flags = IW_ENCODE_DISABLED;
4183 iwe.u.data.length = 0;
4184 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4185 &iwe, "");
4186
4187 if (bss && bss->wpa_ie) {
4188 memset(&iwe, 0, sizeof(iwe));
4189 iwe.cmd = IWEVGENIE;
4190 iwe.u.data.length = bss->wpa_ie_len;
4191 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4192 &iwe, bss->wpa_ie);
4193 }
4194
4195 if (bss && bss->rsn_ie) {
4196 memset(&iwe, 0, sizeof(iwe));
4197 iwe.cmd = IWEVGENIE;
4198 iwe.u.data.length = bss->rsn_ie_len;
4199 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4200 &iwe, bss->rsn_ie);
4201 }
4202
4203 if (bss && bss->ht_ie) {
4204 memset(&iwe, 0, sizeof(iwe));
4205 iwe.cmd = IWEVGENIE;
4206 iwe.u.data.length = bss->ht_ie_len;
4207 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
4208 &iwe, bss->ht_ie);
4209 }
4210
4211 if (bss && bss->supp_rates_len > 0) {
4212 /* display all supported rates in readable format */
4213 char *p = current_ev + iwe_stream_lcp_len(info);
4214 int i;
4215
4216 memset(&iwe, 0, sizeof(iwe));
4217 iwe.cmd = SIOCGIWRATE;
4218 /* Those two flags are ignored... */
4219 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4220
4221 for (i = 0; i < bss->supp_rates_len; i++) {
4222 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4223 0x7f) * 500000);
4224 p = iwe_stream_add_value(info, current_ev, p,
4225 end_buf, &iwe, IW_EV_PARAM_LEN);
4226 }
4227 current_ev = p;
4228 }
4229
4230 if (bss) {
4231 char *buf;
4232 buf = kmalloc(30, GFP_ATOMIC);
4233 if (buf) {
4234 memset(&iwe, 0, sizeof(iwe));
4235 iwe.cmd = IWEVCUSTOM;
4236 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4237 iwe.u.data.length = strlen(buf);
4238 current_ev = iwe_stream_add_point(info, current_ev,
4239 end_buf,
4240 &iwe, buf);
4241 memset(&iwe, 0, sizeof(iwe));
4242 iwe.cmd = IWEVCUSTOM;
4243 sprintf(buf, " Last beacon: %dms ago",
4244 jiffies_to_msecs(jiffies - bss->last_update));
4245 iwe.u.data.length = strlen(buf);
4246 current_ev = iwe_stream_add_point(info, current_ev,
4247 end_buf, &iwe, buf);
4248 kfree(buf);
4249 }
4250 }
4251
4252 if (bss_mesh_cfg(bss)) {
4253 char *buf;
4254 u8 *cfg = bss_mesh_cfg(bss);
4255 buf = kmalloc(50, GFP_ATOMIC);
4256 if (buf) {
4257 memset(&iwe, 0, sizeof(iwe));
4258 iwe.cmd = IWEVCUSTOM;
4259 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4260 iwe.u.data.length = strlen(buf);
4261 current_ev = iwe_stream_add_point(info, current_ev,
4262 end_buf,
4263 &iwe, buf);
4264 sprintf(buf, "Path Selection Protocol ID: "
4265 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4266 cfg[4]);
4267 iwe.u.data.length = strlen(buf);
4268 current_ev = iwe_stream_add_point(info, current_ev,
4269 end_buf,
4270 &iwe, buf);
4271 sprintf(buf, "Path Selection Metric ID: "
4272 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4273 cfg[8]);
4274 iwe.u.data.length = strlen(buf);
4275 current_ev = iwe_stream_add_point(info, current_ev,
4276 end_buf,
4277 &iwe, buf);
4278 sprintf(buf, "Congestion Control Mode ID: "
4279 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4280 cfg[11], cfg[12]);
4281 iwe.u.data.length = strlen(buf);
4282 current_ev = iwe_stream_add_point(info, current_ev,
4283 end_buf,
4284 &iwe, buf);
4285 sprintf(buf, "Channel Precedence: "
4286 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4287 cfg[15], cfg[16]);
4288 iwe.u.data.length = strlen(buf);
4289 current_ev = iwe_stream_add_point(info, current_ev,
4290 end_buf,
4291 &iwe, buf);
4292 kfree(buf);
4293 }
4294 }
4295
4296 return current_ev;
4297 }
4298
4299
4300 int ieee80211_sta_scan_results(struct net_device *dev,
4301 struct iw_request_info *info,
4302 char *buf, size_t len)
4303 {
4304 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4305 char *current_ev = buf;
4306 char *end_buf = buf + len;
4307 struct ieee80211_sta_bss *bss;
4308
4309 spin_lock_bh(&local->sta_bss_lock);
4310 list_for_each_entry(bss, &local->sta_bss_list, list) {
4311 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4312 spin_unlock_bh(&local->sta_bss_lock);
4313 return -E2BIG;
4314 }
4315 current_ev = ieee80211_sta_scan_result(dev, info, bss,
4316 current_ev, end_buf);
4317 }
4318 spin_unlock_bh(&local->sta_bss_lock);
4319 return current_ev - buf;
4320 }
4321
4322
4323 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4324 {
4325 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4326 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4327
4328 kfree(ifsta->extra_ie);
4329 if (len == 0) {
4330 ifsta->extra_ie = NULL;
4331 ifsta->extra_ie_len = 0;
4332 return 0;
4333 }
4334 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4335 if (!ifsta->extra_ie) {
4336 ifsta->extra_ie_len = 0;
4337 return -ENOMEM;
4338 }
4339 memcpy(ifsta->extra_ie, ie, len);
4340 ifsta->extra_ie_len = len;
4341 return 0;
4342 }
4343
4344
4345 struct sta_info *ieee80211_ibss_add_sta(struct net_device *dev,
4346 struct sk_buff *skb, u8 *bssid,
4347 u8 *addr, u64 supp_rates)
4348 {
4349 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4350 struct sta_info *sta;
4351 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4352 DECLARE_MAC_BUF(mac);
4353 int band = local->hw.conf.channel->band;
4354
4355 /* TODO: Could consider removing the least recently used entry and
4356 * allow new one to be added. */
4357 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4358 if (net_ratelimit()) {
4359 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4360 "entry %s\n", dev->name, print_mac(mac, addr));
4361 }
4362 return NULL;
4363 }
4364
4365 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
4366 return NULL;
4367
4368 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
4369 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4370 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4371 #endif
4372
4373 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4374 if (!sta)
4375 return NULL;
4376
4377 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
4378
4379 if (supp_rates)
4380 sta->supp_rates[band] = supp_rates;
4381 else
4382 sta->supp_rates[band] = sdata->u.sta.supp_rates_bits[band];
4383
4384 rate_control_rate_init(sta, local);
4385
4386 if (sta_info_insert(sta))
4387 return NULL;
4388
4389 return sta;
4390 }
4391
4392
4393 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4394 {
4395 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4396 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4397
4398 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
4399 dev->name, reason);
4400
4401 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4402 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4403 return -EINVAL;
4404
4405 ieee80211_send_deauth(dev, ifsta, reason);
4406 ieee80211_set_disassoc(dev, ifsta, 1);
4407 return 0;
4408 }
4409
4410
4411 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4412 {
4413 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4414 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4415
4416 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
4417 dev->name, reason);
4418
4419 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4420 return -EINVAL;
4421
4422 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4423 return -1;
4424
4425 ieee80211_send_disassoc(dev, ifsta, reason);
4426 ieee80211_set_disassoc(dev, ifsta, 0);
4427 return 0;
4428 }
4429
4430 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4431 enum ieee80211_notification_types notif_type)
4432 {
4433 struct ieee80211_local *local = hw_to_local(hw);
4434 struct ieee80211_sub_if_data *sdata;
4435
4436 switch (notif_type) {
4437 case IEEE80211_NOTIFY_RE_ASSOC:
4438 rcu_read_lock();
4439 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4440 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4441 continue;
4442
4443 ieee80211_sta_req_auth(sdata->dev, &sdata->u.sta);
4444 }
4445 rcu_read_unlock();
4446 break;
4447 }
4448 }
4449 EXPORT_SYMBOL(ieee80211_notify_mac);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree