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mac80211: fix key vs. sta locking problems
[linux-2.6/openmoko-kernel/knife-kernel.git] / net / mac80211 / ieee80211_sta.c
blob3584a2bf0186cf75521ab96ed3c86a188a697c4a
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 "ieee80211_rate.h"
34 #include "ieee80211_led.h"
35 #include "mesh.h"
36
37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_MAX_TRIES 3
41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49 #define IEEE80211_PROBE_DELAY (HZ / 33)
50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
56
57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
60 #define ERP_INFO_USE_PROTECTION BIT(1)
61
62 /* mgmt header + 1 byte action code */
63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
64
65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
70
71 /* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73 #define IEEE80211_MIN_AMPDU_BUF 0x8
74 #define IEEE80211_MAX_AMPDU_BUF 0x40
75
76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78 static struct ieee80211_sta_bss *
79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
80 u8 *ssid, u8 ssid_len);
81 static void ieee80211_rx_bss_put(struct net_device *dev,
82 struct ieee80211_sta_bss *bss);
83 static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85 static int ieee80211_sta_wep_configured(struct net_device *dev);
86 static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88 static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
90
91
92 void ieee802_11_parse_elems(u8 *start, size_t len,
93 struct ieee802_11_elems *elems)
94 {
95 size_t left = len;
96 u8 *pos = start;
97
98 memset(elems, 0, sizeof(*elems));
99
100 while (left >= 2) {
101 u8 id, elen;
102
103 id = *pos++;
104 elen = *pos++;
105 left -= 2;
106
107 if (elen > left)
108 return;
109
110 switch (id) {
111 case WLAN_EID_SSID:
112 elems->ssid = pos;
113 elems->ssid_len = elen;
114 break;
115 case WLAN_EID_SUPP_RATES:
116 elems->supp_rates = pos;
117 elems->supp_rates_len = elen;
118 break;
119 case WLAN_EID_FH_PARAMS:
120 elems->fh_params = pos;
121 elems->fh_params_len = elen;
122 break;
123 case WLAN_EID_DS_PARAMS:
124 elems->ds_params = pos;
125 elems->ds_params_len = elen;
126 break;
127 case WLAN_EID_CF_PARAMS:
128 elems->cf_params = pos;
129 elems->cf_params_len = elen;
130 break;
131 case WLAN_EID_TIM:
132 elems->tim = pos;
133 elems->tim_len = elen;
134 break;
135 case WLAN_EID_IBSS_PARAMS:
136 elems->ibss_params = pos;
137 elems->ibss_params_len = elen;
138 break;
139 case WLAN_EID_CHALLENGE:
140 elems->challenge = pos;
141 elems->challenge_len = elen;
142 break;
143 case WLAN_EID_WPA:
144 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
145 pos[2] == 0xf2) {
146 /* Microsoft OUI (00:50:F2) */
147 if (pos[3] == 1) {
148 /* OUI Type 1 - WPA IE */
149 elems->wpa = pos;
150 elems->wpa_len = elen;
151 } else if (elen >= 5 && pos[3] == 2) {
152 if (pos[4] == 0) {
153 elems->wmm_info = pos;
154 elems->wmm_info_len = elen;
155 } else if (pos[4] == 1) {
156 elems->wmm_param = pos;
157 elems->wmm_param_len = elen;
158 }
159 }
160 }
161 break;
162 case WLAN_EID_RSN:
163 elems->rsn = pos;
164 elems->rsn_len = elen;
165 break;
166 case WLAN_EID_ERP_INFO:
167 elems->erp_info = pos;
168 elems->erp_info_len = elen;
169 break;
170 case WLAN_EID_EXT_SUPP_RATES:
171 elems->ext_supp_rates = pos;
172 elems->ext_supp_rates_len = elen;
173 break;
174 case WLAN_EID_HT_CAPABILITY:
175 elems->ht_cap_elem = pos;
176 elems->ht_cap_elem_len = elen;
177 break;
178 case WLAN_EID_HT_EXTRA_INFO:
179 elems->ht_info_elem = pos;
180 elems->ht_info_elem_len = elen;
181 break;
182 case WLAN_EID_MESH_ID:
183 elems->mesh_id = pos;
184 elems->mesh_id_len = elen;
185 break;
186 case WLAN_EID_MESH_CONFIG:
187 elems->mesh_config = pos;
188 elems->mesh_config_len = elen;
189 break;
190 case WLAN_EID_PEER_LINK:
191 elems->peer_link = pos;
192 elems->peer_link_len = elen;
193 break;
194 case WLAN_EID_PREQ:
195 elems->preq = pos;
196 elems->preq_len = elen;
197 break;
198 case WLAN_EID_PREP:
199 elems->prep = pos;
200 elems->prep_len = elen;
201 break;
202 case WLAN_EID_PERR:
203 elems->perr = pos;
204 elems->perr_len = elen;
205 break;
206 default:
207 break;
208 }
209
210 left -= elen;
211 pos += elen;
212 }
213 }
214
215
216 static int ecw2cw(int ecw)
217 {
218 return (1 << ecw) - 1;
219 }
220
221
222 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
223 struct ieee80211_sta_bss *bss,
224 int ibss)
225 {
226 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
227 struct ieee80211_local *local = sdata->local;
228 int i, have_higher_than_11mbit = 0;
229
230
231 /* cf. IEEE 802.11 9.2.12 */
232 for (i = 0; i < bss->supp_rates_len; i++)
233 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
234 have_higher_than_11mbit = 1;
235
236 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
237 have_higher_than_11mbit)
238 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
239 else
240 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
241
242
243 if (local->ops->conf_tx) {
244 struct ieee80211_tx_queue_params qparam;
245
246 memset(&qparam, 0, sizeof(qparam));
247
248 qparam.aifs = 2;
249
250 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
251 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
252 qparam.cw_min = 31;
253 else
254 qparam.cw_min = 15;
255
256 qparam.cw_max = 1023;
257 qparam.txop = 0;
258
259 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
260 local->ops->conf_tx(local_to_hw(local),
261 i + IEEE80211_TX_QUEUE_DATA0,
262 &qparam);
263
264 if (ibss) {
265 /* IBSS uses different parameters for Beacon sending */
266 qparam.cw_min++;
267 qparam.cw_min *= 2;
268 qparam.cw_min--;
269 local->ops->conf_tx(local_to_hw(local),
270 IEEE80211_TX_QUEUE_BEACON, &qparam);
271 }
272 }
273 }
274
275 static void ieee80211_sta_wmm_params(struct net_device *dev,
276 struct ieee80211_if_sta *ifsta,
277 u8 *wmm_param, size_t wmm_param_len)
278 {
279 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
280 struct ieee80211_tx_queue_params params;
281 size_t left;
282 int count;
283 u8 *pos;
284
285 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
286 return;
287 count = wmm_param[6] & 0x0f;
288 if (count == ifsta->wmm_last_param_set)
289 return;
290 ifsta->wmm_last_param_set = count;
291
292 pos = wmm_param + 8;
293 left = wmm_param_len - 8;
294
295 memset(&params, 0, sizeof(params));
296
297 if (!local->ops->conf_tx)
298 return;
299
300 local->wmm_acm = 0;
301 for (; left >= 4; left -= 4, pos += 4) {
302 int aci = (pos[0] >> 5) & 0x03;
303 int acm = (pos[0] >> 4) & 0x01;
304 int queue;
305
306 switch (aci) {
307 case 1:
308 queue = IEEE80211_TX_QUEUE_DATA3;
309 if (acm) {
310 local->wmm_acm |= BIT(0) | BIT(3);
311 }
312 break;
313 case 2:
314 queue = IEEE80211_TX_QUEUE_DATA1;
315 if (acm) {
316 local->wmm_acm |= BIT(4) | BIT(5);
317 }
318 break;
319 case 3:
320 queue = IEEE80211_TX_QUEUE_DATA0;
321 if (acm) {
322 local->wmm_acm |= BIT(6) | BIT(7);
323 }
324 break;
325 case 0:
326 default:
327 queue = IEEE80211_TX_QUEUE_DATA2;
328 if (acm) {
329 local->wmm_acm |= BIT(1) | BIT(2);
330 }
331 break;
332 }
333
334 params.aifs = pos[0] & 0x0f;
335 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
336 params.cw_min = ecw2cw(pos[1] & 0x0f);
337 params.txop = pos[2] | (pos[3] << 8);
338 #ifdef CONFIG_MAC80211_DEBUG
339 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
340 "cWmin=%d cWmax=%d txop=%d\n",
341 dev->name, queue, aci, acm, params.aifs, params.cw_min,
342 params.cw_max, params.txop);
343 #endif
344 /* TODO: handle ACM (block TX, fallback to next lowest allowed
345 * AC for now) */
346 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
347 printk(KERN_DEBUG "%s: failed to set TX queue "
348 "parameters for queue %d\n", dev->name, queue);
349 }
350 }
351 }
352
353
354 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
355 u8 erp_value)
356 {
357 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
358 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
359 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
360 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
361 DECLARE_MAC_BUF(mac);
362 u32 changed = 0;
363
364 if (use_protection != bss_conf->use_cts_prot) {
365 if (net_ratelimit()) {
366 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
367 "%s)\n",
368 sdata->dev->name,
369 use_protection ? "enabled" : "disabled",
370 print_mac(mac, ifsta->bssid));
371 }
372 bss_conf->use_cts_prot = use_protection;
373 changed |= BSS_CHANGED_ERP_CTS_PROT;
374 }
375
376 if (use_short_preamble != bss_conf->use_short_preamble) {
377 if (net_ratelimit()) {
378 printk(KERN_DEBUG "%s: switched to %s barker preamble"
379 " (BSSID=%s)\n",
380 sdata->dev->name,
381 use_short_preamble ? "short" : "long",
382 print_mac(mac, ifsta->bssid));
383 }
384 bss_conf->use_short_preamble = use_short_preamble;
385 changed |= BSS_CHANGED_ERP_PREAMBLE;
386 }
387
388 return changed;
389 }
390
391 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
392 struct ieee80211_ht_info *ht_info)
393 {
394
395 if (ht_info == NULL)
396 return -EINVAL;
397
398 memset(ht_info, 0, sizeof(*ht_info));
399
400 if (ht_cap_ie) {
401 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
402
403 ht_info->ht_supported = 1;
404 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
405 ht_info->ampdu_factor =
406 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
407 ht_info->ampdu_density =
408 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
409 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
410 } else
411 ht_info->ht_supported = 0;
412
413 return 0;
414 }
415
416 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
417 struct ieee80211_ht_addt_info *ht_add_info_ie,
418 struct ieee80211_ht_bss_info *bss_info)
419 {
420 if (bss_info == NULL)
421 return -EINVAL;
422
423 memset(bss_info, 0, sizeof(*bss_info));
424
425 if (ht_add_info_ie) {
426 u16 op_mode;
427 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
428
429 bss_info->primary_channel = ht_add_info_ie->control_chan;
430 bss_info->bss_cap = ht_add_info_ie->ht_param;
431 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
432 }
433
434 return 0;
435 }
436
437 static void ieee80211_sta_send_associnfo(struct net_device *dev,
438 struct ieee80211_if_sta *ifsta)
439 {
440 char *buf;
441 size_t len;
442 int i;
443 union iwreq_data wrqu;
444
445 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
446 return;
447
448 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
449 ifsta->assocresp_ies_len), GFP_KERNEL);
450 if (!buf)
451 return;
452
453 len = sprintf(buf, "ASSOCINFO(");
454 if (ifsta->assocreq_ies) {
455 len += sprintf(buf + len, "ReqIEs=");
456 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
457 len += sprintf(buf + len, "%02x",
458 ifsta->assocreq_ies[i]);
459 }
460 }
461 if (ifsta->assocresp_ies) {
462 if (ifsta->assocreq_ies)
463 len += sprintf(buf + len, " ");
464 len += sprintf(buf + len, "RespIEs=");
465 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
466 len += sprintf(buf + len, "%02x",
467 ifsta->assocresp_ies[i]);
468 }
469 }
470 len += sprintf(buf + len, ")");
471
472 if (len > IW_CUSTOM_MAX) {
473 len = sprintf(buf, "ASSOCRESPIE=");
474 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
475 len += sprintf(buf + len, "%02x",
476 ifsta->assocresp_ies[i]);
477 }
478 }
479
480 memset(&wrqu, 0, sizeof(wrqu));
481 wrqu.data.length = len;
482 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
483
484 kfree(buf);
485 }
486
487
488 static void ieee80211_set_associated(struct net_device *dev,
489 struct ieee80211_if_sta *ifsta,
490 bool assoc)
491 {
492 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
493 struct ieee80211_local *local = sdata->local;
494 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
495 union iwreq_data wrqu;
496 u32 changed = BSS_CHANGED_ASSOC;
497
498 if (assoc) {
499 struct ieee80211_sta_bss *bss;
500
501 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
502
503 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
504 return;
505
506 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
507 conf->channel->center_freq,
508 ifsta->ssid, ifsta->ssid_len);
509 if (bss) {
510 /* set timing information */
511 sdata->bss_conf.beacon_int = bss->beacon_int;
512 sdata->bss_conf.timestamp = bss->timestamp;
513
514 if (bss->has_erp_value)
515 changed |= ieee80211_handle_erp_ie(
516 sdata, bss->erp_value);
517
518 ieee80211_rx_bss_put(dev, bss);
519 }
520
521 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
522 changed |= BSS_CHANGED_HT;
523 sdata->bss_conf.assoc_ht = 1;
524 sdata->bss_conf.ht_conf = &conf->ht_conf;
525 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
526 }
527
528 netif_carrier_on(dev);
529 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
530 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
531 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
532 ieee80211_sta_send_associnfo(dev, ifsta);
533 } else {
534 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
535 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
536 netif_carrier_off(dev);
537 ieee80211_reset_erp_info(dev);
538
539 sdata->bss_conf.assoc_ht = 0;
540 sdata->bss_conf.ht_conf = NULL;
541 sdata->bss_conf.ht_bss_conf = NULL;
542
543 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
544 }
545 ifsta->last_probe = jiffies;
546 ieee80211_led_assoc(local, assoc);
547
548 sdata->bss_conf.assoc = assoc;
549 ieee80211_bss_info_change_notify(sdata, changed);
550 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
551 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
552 }
553
554 static void ieee80211_set_disassoc(struct net_device *dev,
555 struct ieee80211_if_sta *ifsta, int deauth)
556 {
557 if (deauth)
558 ifsta->auth_tries = 0;
559 ifsta->assoc_tries = 0;
560 ieee80211_set_associated(dev, ifsta, 0);
561 }
562
563 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
564 int encrypt)
565 {
566 struct ieee80211_sub_if_data *sdata;
567 struct ieee80211_tx_packet_data *pkt_data;
568
569 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
570 skb->dev = sdata->local->mdev;
571 skb_set_mac_header(skb, 0);
572 skb_set_network_header(skb, 0);
573 skb_set_transport_header(skb, 0);
574
575 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
576 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
577 pkt_data->ifindex = sdata->dev->ifindex;
578 if (!encrypt)
579 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
580
581 dev_queue_xmit(skb);
582 }
583
584
585 static void ieee80211_send_auth(struct net_device *dev,
586 struct ieee80211_if_sta *ifsta,
587 int transaction, u8 *extra, size_t extra_len,
588 int encrypt)
589 {
590 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
591 struct sk_buff *skb;
592 struct ieee80211_mgmt *mgmt;
593
594 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
595 sizeof(*mgmt) + 6 + extra_len);
596 if (!skb) {
597 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
598 "frame\n", dev->name);
599 return;
600 }
601 skb_reserve(skb, local->hw.extra_tx_headroom);
602
603 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
604 memset(mgmt, 0, 24 + 6);
605 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
606 IEEE80211_STYPE_AUTH);
607 if (encrypt)
608 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
609 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
610 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
611 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
612 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
613 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
614 ifsta->auth_transaction = transaction + 1;
615 mgmt->u.auth.status_code = cpu_to_le16(0);
616 if (extra)
617 memcpy(skb_put(skb, extra_len), extra, extra_len);
618
619 ieee80211_sta_tx(dev, skb, encrypt);
620 }
621
622
623 static void ieee80211_authenticate(struct net_device *dev,
624 struct ieee80211_if_sta *ifsta)
625 {
626 DECLARE_MAC_BUF(mac);
627
628 ifsta->auth_tries++;
629 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
630 printk(KERN_DEBUG "%s: authentication with AP %s"
631 " timed out\n",
632 dev->name, print_mac(mac, ifsta->bssid));
633 ifsta->state = IEEE80211_DISABLED;
634 return;
635 }
636
637 ifsta->state = IEEE80211_AUTHENTICATE;
638 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
639 dev->name, print_mac(mac, ifsta->bssid));
640
641 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
642
643 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
644 }
645
646
647 static void ieee80211_send_assoc(struct net_device *dev,
648 struct ieee80211_if_sta *ifsta)
649 {
650 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
651 struct sk_buff *skb;
652 struct ieee80211_mgmt *mgmt;
653 u8 *pos, *ies;
654 int i, len;
655 u16 capab;
656 struct ieee80211_sta_bss *bss;
657 int wmm = 0;
658 struct ieee80211_supported_band *sband;
659
660 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
661 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
662 ifsta->ssid_len);
663 if (!skb) {
664 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
665 "frame\n", dev->name);
666 return;
667 }
668 skb_reserve(skb, local->hw.extra_tx_headroom);
669
670 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
671
672 capab = ifsta->capab;
673
674 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
675 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
676 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
677 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
678 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
679 }
680
681 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
682 local->hw.conf.channel->center_freq,
683 ifsta->ssid, ifsta->ssid_len);
684 if (bss) {
685 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
686 capab |= WLAN_CAPABILITY_PRIVACY;
687 if (bss->wmm_ie) {
688 wmm = 1;
689 }
690 ieee80211_rx_bss_put(dev, bss);
691 }
692
693 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
694 memset(mgmt, 0, 24);
695 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
696 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
697 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
698
699 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
700 skb_put(skb, 10);
701 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
702 IEEE80211_STYPE_REASSOC_REQ);
703 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
704 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
705 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
706 ETH_ALEN);
707 } else {
708 skb_put(skb, 4);
709 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
710 IEEE80211_STYPE_ASSOC_REQ);
711 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
712 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
713 }
714
715 /* SSID */
716 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
717 *pos++ = WLAN_EID_SSID;
718 *pos++ = ifsta->ssid_len;
719 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
720
721 len = sband->n_bitrates;
722 if (len > 8)
723 len = 8;
724 pos = skb_put(skb, len + 2);
725 *pos++ = WLAN_EID_SUPP_RATES;
726 *pos++ = len;
727 for (i = 0; i < len; i++) {
728 int rate = sband->bitrates[i].bitrate;
729 *pos++ = (u8) (rate / 5);
730 }
731
732 if (sband->n_bitrates > len) {
733 pos = skb_put(skb, sband->n_bitrates - len + 2);
734 *pos++ = WLAN_EID_EXT_SUPP_RATES;
735 *pos++ = sband->n_bitrates - len;
736 for (i = len; i < sband->n_bitrates; i++) {
737 int rate = sband->bitrates[i].bitrate;
738 *pos++ = (u8) (rate / 5);
739 }
740 }
741
742 if (ifsta->extra_ie) {
743 pos = skb_put(skb, ifsta->extra_ie_len);
744 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
745 }
746
747 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
748 pos = skb_put(skb, 9);
749 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
750 *pos++ = 7; /* len */
751 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
752 *pos++ = 0x50;
753 *pos++ = 0xf2;
754 *pos++ = 2; /* WME */
755 *pos++ = 0; /* WME info */
756 *pos++ = 1; /* WME ver */
757 *pos++ = 0;
758 }
759 /* wmm support is a must to HT */
760 if (wmm && sband->ht_info.ht_supported) {
761 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
762 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
763 *pos++ = WLAN_EID_HT_CAPABILITY;
764 *pos++ = sizeof(struct ieee80211_ht_cap);
765 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
766 memcpy(pos, &tmp, sizeof(u16));
767 pos += sizeof(u16);
768 /* TODO: needs a define here for << 2 */
769 *pos++ = sband->ht_info.ampdu_factor |
770 (sband->ht_info.ampdu_density << 2);
771 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
772 }
773
774 kfree(ifsta->assocreq_ies);
775 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
776 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
777 if (ifsta->assocreq_ies)
778 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
779
780 ieee80211_sta_tx(dev, skb, 0);
781 }
782
783
784 static void ieee80211_send_deauth(struct net_device *dev,
785 struct ieee80211_if_sta *ifsta, u16 reason)
786 {
787 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
788 struct sk_buff *skb;
789 struct ieee80211_mgmt *mgmt;
790
791 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
792 if (!skb) {
793 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
794 "frame\n", dev->name);
795 return;
796 }
797 skb_reserve(skb, local->hw.extra_tx_headroom);
798
799 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
800 memset(mgmt, 0, 24);
801 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
802 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
803 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
804 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
805 IEEE80211_STYPE_DEAUTH);
806 skb_put(skb, 2);
807 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
808
809 ieee80211_sta_tx(dev, skb, 0);
810 }
811
812
813 static void ieee80211_send_disassoc(struct net_device *dev,
814 struct ieee80211_if_sta *ifsta, u16 reason)
815 {
816 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
817 struct sk_buff *skb;
818 struct ieee80211_mgmt *mgmt;
819
820 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
821 if (!skb) {
822 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
823 "frame\n", dev->name);
824 return;
825 }
826 skb_reserve(skb, local->hw.extra_tx_headroom);
827
828 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
829 memset(mgmt, 0, 24);
830 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
831 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
832 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
833 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
834 IEEE80211_STYPE_DISASSOC);
835 skb_put(skb, 2);
836 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
837
838 ieee80211_sta_tx(dev, skb, 0);
839 }
840
841
842 static int ieee80211_privacy_mismatch(struct net_device *dev,
843 struct ieee80211_if_sta *ifsta)
844 {
845 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
846 struct ieee80211_sta_bss *bss;
847 int bss_privacy;
848 int wep_privacy;
849 int privacy_invoked;
850
851 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
852 return 0;
853
854 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
855 local->hw.conf.channel->center_freq,
856 ifsta->ssid, ifsta->ssid_len);
857 if (!bss)
858 return 0;
859
860 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
861 wep_privacy = !!ieee80211_sta_wep_configured(dev);
862 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
863
864 ieee80211_rx_bss_put(dev, bss);
865
866 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
867 return 0;
868
869 return 1;
870 }
871
872
873 static void ieee80211_associate(struct net_device *dev,
874 struct ieee80211_if_sta *ifsta)
875 {
876 DECLARE_MAC_BUF(mac);
877
878 ifsta->assoc_tries++;
879 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
880 printk(KERN_DEBUG "%s: association with AP %s"
881 " timed out\n",
882 dev->name, print_mac(mac, ifsta->bssid));
883 ifsta->state = IEEE80211_DISABLED;
884 return;
885 }
886
887 ifsta->state = IEEE80211_ASSOCIATE;
888 printk(KERN_DEBUG "%s: associate with AP %s\n",
889 dev->name, print_mac(mac, ifsta->bssid));
890 if (ieee80211_privacy_mismatch(dev, ifsta)) {
891 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
892 "mixed-cell disabled - abort association\n", dev->name);
893 ifsta->state = IEEE80211_DISABLED;
894 return;
895 }
896
897 ieee80211_send_assoc(dev, ifsta);
898
899 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
900 }
901
902
903 static void ieee80211_associated(struct net_device *dev,
904 struct ieee80211_if_sta *ifsta)
905 {
906 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
907 struct sta_info *sta;
908 int disassoc;
909 DECLARE_MAC_BUF(mac);
910
911 /* TODO: start monitoring current AP signal quality and number of
912 * missed beacons. Scan other channels every now and then and search
913 * for better APs. */
914 /* TODO: remove expired BSSes */
915
916 ifsta->state = IEEE80211_ASSOCIATED;
917
918 rcu_read_lock();
919
920 sta = sta_info_get(local, ifsta->bssid);
921 if (!sta) {
922 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
923 dev->name, print_mac(mac, ifsta->bssid));
924 disassoc = 1;
925 } else {
926 disassoc = 0;
927 if (time_after(jiffies,
928 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
929 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
930 printk(KERN_DEBUG "%s: No ProbeResp from "
931 "current AP %s - assume out of "
932 "range\n",
933 dev->name, print_mac(mac, ifsta->bssid));
934 disassoc = 1;
935 sta_info_unlink(&sta);
936 } else
937 ieee80211_send_probe_req(dev, ifsta->bssid,
938 local->scan_ssid,
939 local->scan_ssid_len);
940 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
941 } else {
942 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
943 if (time_after(jiffies, ifsta->last_probe +
944 IEEE80211_PROBE_INTERVAL)) {
945 ifsta->last_probe = jiffies;
946 ieee80211_send_probe_req(dev, ifsta->bssid,
947 ifsta->ssid,
948 ifsta->ssid_len);
949 }
950 }
951 }
952
953 rcu_read_unlock();
954
955 if (disassoc && sta)
956 sta_info_destroy(sta);
957
958 if (disassoc) {
959 ifsta->state = IEEE80211_DISABLED;
960 ieee80211_set_associated(dev, ifsta, 0);
961 } else {
962 mod_timer(&ifsta->timer, jiffies +
963 IEEE80211_MONITORING_INTERVAL);
964 }
965 }
966
967
968 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
969 u8 *ssid, size_t ssid_len)
970 {
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
972 struct ieee80211_supported_band *sband;
973 struct sk_buff *skb;
974 struct ieee80211_mgmt *mgmt;
975 u8 *pos, *supp_rates, *esupp_rates = NULL;
976 int i;
977
978 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
979 if (!skb) {
980 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
981 "request\n", dev->name);
982 return;
983 }
984 skb_reserve(skb, local->hw.extra_tx_headroom);
985
986 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
987 memset(mgmt, 0, 24);
988 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
989 IEEE80211_STYPE_PROBE_REQ);
990 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
991 if (dst) {
992 memcpy(mgmt->da, dst, ETH_ALEN);
993 memcpy(mgmt->bssid, dst, ETH_ALEN);
994 } else {
995 memset(mgmt->da, 0xff, ETH_ALEN);
996 memset(mgmt->bssid, 0xff, ETH_ALEN);
997 }
998 pos = skb_put(skb, 2 + ssid_len);
999 *pos++ = WLAN_EID_SSID;
1000 *pos++ = ssid_len;
1001 memcpy(pos, ssid, ssid_len);
1002
1003 supp_rates = skb_put(skb, 2);
1004 supp_rates[0] = WLAN_EID_SUPP_RATES;
1005 supp_rates[1] = 0;
1006 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1007
1008 for (i = 0; i < sband->n_bitrates; i++) {
1009 struct ieee80211_rate *rate = &sband->bitrates[i];
1010 if (esupp_rates) {
1011 pos = skb_put(skb, 1);
1012 esupp_rates[1]++;
1013 } else if (supp_rates[1] == 8) {
1014 esupp_rates = skb_put(skb, 3);
1015 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1016 esupp_rates[1] = 1;
1017 pos = &esupp_rates[2];
1018 } else {
1019 pos = skb_put(skb, 1);
1020 supp_rates[1]++;
1021 }
1022 *pos = rate->bitrate / 5;
1023 }
1024
1025 ieee80211_sta_tx(dev, skb, 0);
1026 }
1027
1028
1029 static int ieee80211_sta_wep_configured(struct net_device *dev)
1030 {
1031 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032 if (!sdata || !sdata->default_key ||
1033 sdata->default_key->conf.alg != ALG_WEP)
1034 return 0;
1035 return 1;
1036 }
1037
1038
1039 static void ieee80211_auth_completed(struct net_device *dev,
1040 struct ieee80211_if_sta *ifsta)
1041 {
1042 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1043 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1044 ieee80211_associate(dev, ifsta);
1045 }
1046
1047
1048 static void ieee80211_auth_challenge(struct net_device *dev,
1049 struct ieee80211_if_sta *ifsta,
1050 struct ieee80211_mgmt *mgmt,
1051 size_t len)
1052 {
1053 u8 *pos;
1054 struct ieee802_11_elems elems;
1055
1056 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1057 pos = mgmt->u.auth.variable;
1058 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1059 if (!elems.challenge) {
1060 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1061 "frame\n", dev->name);
1062 return;
1063 }
1064 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1065 elems.challenge_len + 2, 1);
1066 }
1067
1068 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1069 u8 dialog_token, u16 status, u16 policy,
1070 u16 buf_size, u16 timeout)
1071 {
1072 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1073 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1074 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1075 struct sk_buff *skb;
1076 struct ieee80211_mgmt *mgmt;
1077 u16 capab;
1078
1079 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1080 sizeof(mgmt->u.action.u.addba_resp));
1081 if (!skb) {
1082 printk(KERN_DEBUG "%s: failed to allocate buffer "
1083 "for addba resp frame\n", dev->name);
1084 return;
1085 }
1086
1087 skb_reserve(skb, local->hw.extra_tx_headroom);
1088 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1089 memset(mgmt, 0, 24);
1090 memcpy(mgmt->da, da, ETH_ALEN);
1091 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1092 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1093 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1094 else
1095 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1096 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1097 IEEE80211_STYPE_ACTION);
1098
1099 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1100 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1101 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1102 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1103
1104 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1105 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1106 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1107
1108 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1109 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1110 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1111
1112 ieee80211_sta_tx(dev, skb, 0);
1113
1114 return;
1115 }
1116
1117 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1118 u16 tid, u8 dialog_token, u16 start_seq_num,
1119 u16 agg_size, u16 timeout)
1120 {
1121 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1122 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1123 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1124 struct sk_buff *skb;
1125 struct ieee80211_mgmt *mgmt;
1126 u16 capab;
1127
1128 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1129 sizeof(mgmt->u.action.u.addba_req));
1130
1131
1132 if (!skb) {
1133 printk(KERN_ERR "%s: failed to allocate buffer "
1134 "for addba request frame\n", dev->name);
1135 return;
1136 }
1137 skb_reserve(skb, local->hw.extra_tx_headroom);
1138 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1139 memset(mgmt, 0, 24);
1140 memcpy(mgmt->da, da, ETH_ALEN);
1141 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1142 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1143 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1144 else
1145 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1146
1147 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1148 IEEE80211_STYPE_ACTION);
1149
1150 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1151
1152 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1153 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1154
1155 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1156 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1157 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1158 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1159
1160 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1161
1162 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1163 mgmt->u.action.u.addba_req.start_seq_num =
1164 cpu_to_le16(start_seq_num << 4);
1165
1166 ieee80211_sta_tx(dev, skb, 0);
1167 }
1168
1169 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1170 struct ieee80211_mgmt *mgmt,
1171 size_t len)
1172 {
1173 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1174 struct ieee80211_hw *hw = &local->hw;
1175 struct ieee80211_conf *conf = &hw->conf;
1176 struct sta_info *sta;
1177 struct tid_ampdu_rx *tid_agg_rx;
1178 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1179 u8 dialog_token;
1180 int ret = -EOPNOTSUPP;
1181 DECLARE_MAC_BUF(mac);
1182
1183 rcu_read_lock();
1184
1185 sta = sta_info_get(local, mgmt->sa);
1186 if (!sta) {
1187 rcu_read_unlock();
1188 return;
1189 }
1190
1191 /* extract session parameters from addba request frame */
1192 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1193 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1194 start_seq_num =
1195 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1196
1197 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1198 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1199 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1200 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1201
1202 status = WLAN_STATUS_REQUEST_DECLINED;
1203
1204 /* sanity check for incoming parameters:
1205 * check if configuration can support the BA policy
1206 * and if buffer size does not exceeds max value */
1207 if (((ba_policy != 1)
1208 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1209 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1210 status = WLAN_STATUS_INVALID_QOS_PARAM;
1211 #ifdef CONFIG_MAC80211_HT_DEBUG
1212 if (net_ratelimit())
1213 printk(KERN_DEBUG "AddBA Req with bad params from "
1214 "%s on tid %u. policy %d, buffer size %d\n",
1215 print_mac(mac, mgmt->sa), tid, ba_policy,
1216 buf_size);
1217 #endif /* CONFIG_MAC80211_HT_DEBUG */
1218 goto end_no_lock;
1219 }
1220 /* determine default buffer size */
1221 if (buf_size == 0) {
1222 struct ieee80211_supported_band *sband;
1223
1224 sband = local->hw.wiphy->bands[conf->channel->band];
1225 buf_size = IEEE80211_MIN_AMPDU_BUF;
1226 buf_size = buf_size << sband->ht_info.ampdu_factor;
1227 }
1228
1229
1230 /* examine state machine */
1231 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1232
1233 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1234 #ifdef CONFIG_MAC80211_HT_DEBUG
1235 if (net_ratelimit())
1236 printk(KERN_DEBUG "unexpected AddBA Req from "
1237 "%s on tid %u\n",
1238 print_mac(mac, mgmt->sa), tid);
1239 #endif /* CONFIG_MAC80211_HT_DEBUG */
1240 goto end;
1241 }
1242
1243 /* prepare A-MPDU MLME for Rx aggregation */
1244 sta->ampdu_mlme.tid_rx[tid] =
1245 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1246 if (!sta->ampdu_mlme.tid_rx[tid]) {
1247 if (net_ratelimit())
1248 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1249 tid);
1250 goto end;
1251 }
1252 /* rx timer */
1253 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1254 sta_rx_agg_session_timer_expired;
1255 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1256 (unsigned long)&sta->timer_to_tid[tid];
1257 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1258
1259 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1260
1261 /* prepare reordering buffer */
1262 tid_agg_rx->reorder_buf =
1263 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1264 if (!tid_agg_rx->reorder_buf) {
1265 if (net_ratelimit())
1266 printk(KERN_ERR "can not allocate reordering buffer "
1267 "to tid %d\n", tid);
1268 kfree(sta->ampdu_mlme.tid_rx[tid]);
1269 goto end;
1270 }
1271 memset(tid_agg_rx->reorder_buf, 0,
1272 buf_size * sizeof(struct sk_buf *));
1273
1274 if (local->ops->ampdu_action)
1275 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1276 sta->addr, tid, &start_seq_num);
1277 #ifdef CONFIG_MAC80211_HT_DEBUG
1278 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1279 #endif /* CONFIG_MAC80211_HT_DEBUG */
1280
1281 if (ret) {
1282 kfree(tid_agg_rx->reorder_buf);
1283 kfree(tid_agg_rx);
1284 sta->ampdu_mlme.tid_rx[tid] = NULL;
1285 goto end;
1286 }
1287
1288 /* change state and send addba resp */
1289 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1290 tid_agg_rx->dialog_token = dialog_token;
1291 tid_agg_rx->ssn = start_seq_num;
1292 tid_agg_rx->head_seq_num = start_seq_num;
1293 tid_agg_rx->buf_size = buf_size;
1294 tid_agg_rx->timeout = timeout;
1295 tid_agg_rx->stored_mpdu_num = 0;
1296 status = WLAN_STATUS_SUCCESS;
1297 end:
1298 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1299
1300 end_no_lock:
1301 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1302 dialog_token, status, 1, buf_size, timeout);
1303 rcu_read_unlock();
1304 }
1305
1306 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1307 struct ieee80211_mgmt *mgmt,
1308 size_t len)
1309 {
1310 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1311 struct ieee80211_hw *hw = &local->hw;
1312 struct sta_info *sta;
1313 u16 capab;
1314 u16 tid;
1315 u8 *state;
1316
1317 rcu_read_lock();
1318
1319 sta = sta_info_get(local, mgmt->sa);
1320 if (!sta) {
1321 rcu_read_unlock();
1322 return;
1323 }
1324
1325 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1326 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1327
1328 state = &sta->ampdu_mlme.tid_state_tx[tid];
1329
1330 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1331
1332 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1333 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1334 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1335 "%d\n", *state);
1336 goto addba_resp_exit;
1337 }
1338
1339 if (mgmt->u.action.u.addba_resp.dialog_token !=
1340 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1341 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1342 #ifdef CONFIG_MAC80211_HT_DEBUG
1343 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1344 #endif /* CONFIG_MAC80211_HT_DEBUG */
1345 goto addba_resp_exit;
1346 }
1347
1348 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1349 #ifdef CONFIG_MAC80211_HT_DEBUG
1350 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1351 #endif /* CONFIG_MAC80211_HT_DEBUG */
1352 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1353 == WLAN_STATUS_SUCCESS) {
1354 if (*state & HT_ADDBA_RECEIVED_MSK)
1355 printk(KERN_DEBUG "double addBA response\n");
1356
1357 *state |= HT_ADDBA_RECEIVED_MSK;
1358 sta->ampdu_mlme.addba_req_num[tid] = 0;
1359
1360 if (*state == HT_AGG_STATE_OPERATIONAL) {
1361 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1362 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1363 }
1364
1365 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1366 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1367 } else {
1368 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1369
1370 sta->ampdu_mlme.addba_req_num[tid]++;
1371 /* this will allow the state check in stop_BA_session */
1372 *state = HT_AGG_STATE_OPERATIONAL;
1373 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1374 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1375 WLAN_BACK_INITIATOR);
1376 }
1377
1378 addba_resp_exit:
1379 rcu_read_unlock();
1380 }
1381
1382 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1383 u16 initiator, u16 reason_code)
1384 {
1385 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1386 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1387 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1388 struct sk_buff *skb;
1389 struct ieee80211_mgmt *mgmt;
1390 u16 params;
1391
1392 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1393 sizeof(mgmt->u.action.u.delba));
1394
1395 if (!skb) {
1396 printk(KERN_ERR "%s: failed to allocate buffer "
1397 "for delba frame\n", dev->name);
1398 return;
1399 }
1400
1401 skb_reserve(skb, local->hw.extra_tx_headroom);
1402 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1403 memset(mgmt, 0, 24);
1404 memcpy(mgmt->da, da, ETH_ALEN);
1405 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1406 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1407 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1408 else
1409 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1410 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1411 IEEE80211_STYPE_ACTION);
1412
1413 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1414
1415 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1416 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1417 params = (u16)(initiator << 11); /* bit 11 initiator */
1418 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1419
1420 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1421 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1422
1423 ieee80211_sta_tx(dev, skb, 0);
1424 }
1425
1426 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1427 u16 initiator, u16 reason)
1428 {
1429 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1430 struct ieee80211_hw *hw = &local->hw;
1431 struct sta_info *sta;
1432 int ret, i;
1433 DECLARE_MAC_BUF(mac);
1434
1435 rcu_read_lock();
1436
1437 sta = sta_info_get(local, ra);
1438 if (!sta) {
1439 rcu_read_unlock();
1440 return;
1441 }
1442
1443 /* check if TID is in operational state */
1444 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1445 if (sta->ampdu_mlme.tid_state_rx[tid]
1446 != HT_AGG_STATE_OPERATIONAL) {
1447 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1448 rcu_read_unlock();
1449 return;
1450 }
1451 sta->ampdu_mlme.tid_state_rx[tid] =
1452 HT_AGG_STATE_REQ_STOP_BA_MSK |
1453 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1454 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1455
1456 /* stop HW Rx aggregation. ampdu_action existence
1457 * already verified in session init so we add the BUG_ON */
1458 BUG_ON(!local->ops->ampdu_action);
1459
1460 #ifdef CONFIG_MAC80211_HT_DEBUG
1461 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1462 print_mac(mac, ra), tid);
1463 #endif /* CONFIG_MAC80211_HT_DEBUG */
1464
1465 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1466 ra, tid, NULL);
1467 if (ret)
1468 printk(KERN_DEBUG "HW problem - can not stop rx "
1469 "aggergation for tid %d\n", tid);
1470
1471 /* shutdown timer has not expired */
1472 if (initiator != WLAN_BACK_TIMER)
1473 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1474
1475 /* check if this is a self generated aggregation halt */
1476 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1477 ieee80211_send_delba(dev, ra, tid, 0, reason);
1478
1479 /* free the reordering buffer */
1480 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1481 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1482 /* release the reordered frames */
1483 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1484 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1485 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1486 }
1487 }
1488 /* free resources */
1489 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1490 kfree(sta->ampdu_mlme.tid_rx[tid]);
1491 sta->ampdu_mlme.tid_rx[tid] = NULL;
1492 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1493
1494 rcu_read_unlock();
1495 }
1496
1497
1498 static void ieee80211_sta_process_delba(struct net_device *dev,
1499 struct ieee80211_mgmt *mgmt, size_t len)
1500 {
1501 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1502 struct sta_info *sta;
1503 u16 tid, params;
1504 u16 initiator;
1505 DECLARE_MAC_BUF(mac);
1506
1507 rcu_read_lock();
1508
1509 sta = sta_info_get(local, mgmt->sa);
1510 if (!sta) {
1511 rcu_read_unlock();
1512 return;
1513 }
1514
1515 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1516 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1517 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1518
1519 #ifdef CONFIG_MAC80211_HT_DEBUG
1520 if (net_ratelimit())
1521 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1522 print_mac(mac, mgmt->sa),
1523 initiator ? "initiator" : "recipient", tid,
1524 mgmt->u.action.u.delba.reason_code);
1525 #endif /* CONFIG_MAC80211_HT_DEBUG */
1526
1527 if (initiator == WLAN_BACK_INITIATOR)
1528 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1529 WLAN_BACK_INITIATOR, 0);
1530 else { /* WLAN_BACK_RECIPIENT */
1531 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1532 sta->ampdu_mlme.tid_state_tx[tid] =
1533 HT_AGG_STATE_OPERATIONAL;
1534 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1535 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1536 WLAN_BACK_RECIPIENT);
1537 }
1538 rcu_read_unlock();
1539 }
1540
1541 /*
1542 * After sending add Block Ack request we activated a timer until
1543 * add Block Ack response will arrive from the recipient.
1544 * If this timer expires sta_addba_resp_timer_expired will be executed.
1545 */
1546 void sta_addba_resp_timer_expired(unsigned long data)
1547 {
1548 /* not an elegant detour, but there is no choice as the timer passes
1549 * only one argument, and both sta_info and TID are needed, so init
1550 * flow in sta_info_create gives the TID as data, while the timer_to_id
1551 * array gives the sta through container_of */
1552 u16 tid = *(int *)data;
1553 struct sta_info *temp_sta = container_of((void *)data,
1554 struct sta_info, timer_to_tid[tid]);
1555
1556 struct ieee80211_local *local = temp_sta->local;
1557 struct ieee80211_hw *hw = &local->hw;
1558 struct sta_info *sta;
1559 u8 *state;
1560
1561 rcu_read_lock();
1562
1563 sta = sta_info_get(local, temp_sta->addr);
1564 if (!sta) {
1565 rcu_read_unlock();
1566 return;
1567 }
1568
1569 state = &sta->ampdu_mlme.tid_state_tx[tid];
1570 /* check if the TID waits for addBA response */
1571 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1572 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1573 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1574 *state = HT_AGG_STATE_IDLE;
1575 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1576 "expecting addBA response there", tid);
1577 goto timer_expired_exit;
1578 }
1579
1580 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1581
1582 /* go through the state check in stop_BA_session */
1583 *state = HT_AGG_STATE_OPERATIONAL;
1584 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1585 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1586 WLAN_BACK_INITIATOR);
1587
1588 timer_expired_exit:
1589 rcu_read_unlock();
1590 }
1591
1592 /*
1593 * After accepting the AddBA Request we activated a timer,
1594 * resetting it after each frame that arrives from the originator.
1595 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1596 */
1597 void sta_rx_agg_session_timer_expired(unsigned long data)
1598 {
1599 /* not an elegant detour, but there is no choice as the timer passes
1600 * only one argument, and verious sta_info are needed here, so init
1601 * flow in sta_info_create gives the TID as data, while the timer_to_id
1602 * array gives the sta through container_of */
1603 u8 *ptid = (u8 *)data;
1604 u8 *timer_to_id = ptid - *ptid;
1605 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1606 timer_to_tid[0]);
1607
1608 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1609 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1610 (u16)*ptid, WLAN_BACK_TIMER,
1611 WLAN_REASON_QSTA_TIMEOUT);
1612 }
1613
1614 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1615 {
1616 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1617 int i;
1618
1619 for (i = 0; i < STA_TID_NUM; i++) {
1620 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1621 WLAN_BACK_INITIATOR);
1622 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1623 WLAN_BACK_RECIPIENT,
1624 WLAN_REASON_QSTA_LEAVE_QBSS);
1625 }
1626 }
1627
1628 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1629 struct ieee80211_if_sta *ifsta,
1630 struct ieee80211_mgmt *mgmt,
1631 size_t len)
1632 {
1633 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1634 u16 auth_alg, auth_transaction, status_code;
1635 DECLARE_MAC_BUF(mac);
1636
1637 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1638 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1639 printk(KERN_DEBUG "%s: authentication frame received from "
1640 "%s, but not in authenticate state - ignored\n",
1641 dev->name, print_mac(mac, mgmt->sa));
1642 return;
1643 }
1644
1645 if (len < 24 + 6) {
1646 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1647 "received from %s - ignored\n",
1648 dev->name, len, print_mac(mac, mgmt->sa));
1649 return;
1650 }
1651
1652 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1653 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1654 printk(KERN_DEBUG "%s: authentication frame received from "
1655 "unknown AP (SA=%s BSSID=%s) - "
1656 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1657 print_mac(mac, mgmt->bssid));
1658 return;
1659 }
1660
1661 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1662 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1663 printk(KERN_DEBUG "%s: authentication frame received from "
1664 "unknown BSSID (SA=%s BSSID=%s) - "
1665 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1666 print_mac(mac, mgmt->bssid));
1667 return;
1668 }
1669
1670 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1671 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1672 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1673
1674 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1675 "transaction=%d status=%d)\n",
1676 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1677 auth_transaction, status_code);
1678
1679 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1680 /* IEEE 802.11 standard does not require authentication in IBSS
1681 * networks and most implementations do not seem to use it.
1682 * However, try to reply to authentication attempts if someone
1683 * has actually implemented this.
1684 * TODO: Could implement shared key authentication. */
1685 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1686 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1687 "frame (alg=%d transaction=%d)\n",
1688 dev->name, auth_alg, auth_transaction);
1689 return;
1690 }
1691 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1692 }
1693
1694 if (auth_alg != ifsta->auth_alg ||
1695 auth_transaction != ifsta->auth_transaction) {
1696 printk(KERN_DEBUG "%s: unexpected authentication frame "
1697 "(alg=%d transaction=%d)\n",
1698 dev->name, auth_alg, auth_transaction);
1699 return;
1700 }
1701
1702 if (status_code != WLAN_STATUS_SUCCESS) {
1703 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1704 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1705 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1706 u8 algs[3];
1707 const int num_algs = ARRAY_SIZE(algs);
1708 int i, pos;
1709 algs[0] = algs[1] = algs[2] = 0xff;
1710 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1711 algs[0] = WLAN_AUTH_OPEN;
1712 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1713 algs[1] = WLAN_AUTH_SHARED_KEY;
1714 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1715 algs[2] = WLAN_AUTH_LEAP;
1716 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1717 pos = 0;
1718 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1719 pos = 1;
1720 else
1721 pos = 2;
1722 for (i = 0; i < num_algs; i++) {
1723 pos++;
1724 if (pos >= num_algs)
1725 pos = 0;
1726 if (algs[pos] == ifsta->auth_alg ||
1727 algs[pos] == 0xff)
1728 continue;
1729 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1730 !ieee80211_sta_wep_configured(dev))
1731 continue;
1732 ifsta->auth_alg = algs[pos];
1733 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1734 "next try\n",
1735 dev->name, ifsta->auth_alg);
1736 break;
1737 }
1738 }
1739 return;
1740 }
1741
1742 switch (ifsta->auth_alg) {
1743 case WLAN_AUTH_OPEN:
1744 case WLAN_AUTH_LEAP:
1745 ieee80211_auth_completed(dev, ifsta);
1746 break;
1747 case WLAN_AUTH_SHARED_KEY:
1748 if (ifsta->auth_transaction == 4)
1749 ieee80211_auth_completed(dev, ifsta);
1750 else
1751 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1752 break;
1753 }
1754 }
1755
1756
1757 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1758 struct ieee80211_if_sta *ifsta,
1759 struct ieee80211_mgmt *mgmt,
1760 size_t len)
1761 {
1762 u16 reason_code;
1763 DECLARE_MAC_BUF(mac);
1764
1765 if (len < 24 + 2) {
1766 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1767 "received from %s - ignored\n",
1768 dev->name, len, print_mac(mac, mgmt->sa));
1769 return;
1770 }
1771
1772 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1773 printk(KERN_DEBUG "%s: deauthentication frame received from "
1774 "unknown AP (SA=%s BSSID=%s) - "
1775 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1776 print_mac(mac, mgmt->bssid));
1777 return;
1778 }
1779
1780 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1781
1782 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1783 " (reason=%d)\n",
1784 dev->name, print_mac(mac, mgmt->sa), reason_code);
1785
1786 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1787 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1788 }
1789
1790 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1791 ifsta->state == IEEE80211_ASSOCIATE ||
1792 ifsta->state == IEEE80211_ASSOCIATED) {
1793 ifsta->state = IEEE80211_AUTHENTICATE;
1794 mod_timer(&ifsta->timer, jiffies +
1795 IEEE80211_RETRY_AUTH_INTERVAL);
1796 }
1797
1798 ieee80211_set_disassoc(dev, ifsta, 1);
1799 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1800 }
1801
1802
1803 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1804 struct ieee80211_if_sta *ifsta,
1805 struct ieee80211_mgmt *mgmt,
1806 size_t len)
1807 {
1808 u16 reason_code;
1809 DECLARE_MAC_BUF(mac);
1810
1811 if (len < 24 + 2) {
1812 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1813 "received from %s - ignored\n",
1814 dev->name, len, print_mac(mac, mgmt->sa));
1815 return;
1816 }
1817
1818 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1819 printk(KERN_DEBUG "%s: disassociation frame received from "
1820 "unknown AP (SA=%s BSSID=%s) - "
1821 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1822 print_mac(mac, mgmt->bssid));
1823 return;
1824 }
1825
1826 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1827
1828 printk(KERN_DEBUG "%s: RX disassociation from %s"
1829 " (reason=%d)\n",
1830 dev->name, print_mac(mac, mgmt->sa), reason_code);
1831
1832 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1833 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1834
1835 if (ifsta->state == IEEE80211_ASSOCIATED) {
1836 ifsta->state = IEEE80211_ASSOCIATE;
1837 mod_timer(&ifsta->timer, jiffies +
1838 IEEE80211_RETRY_AUTH_INTERVAL);
1839 }
1840
1841 ieee80211_set_disassoc(dev, ifsta, 0);
1842 }
1843
1844
1845 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1846 struct ieee80211_if_sta *ifsta,
1847 struct ieee80211_mgmt *mgmt,
1848 size_t len,
1849 int reassoc)
1850 {
1851 struct ieee80211_local *local = sdata->local;
1852 struct net_device *dev = sdata->dev;
1853 struct ieee80211_supported_band *sband;
1854 struct sta_info *sta;
1855 u64 rates, basic_rates;
1856 u16 capab_info, status_code, aid;
1857 struct ieee802_11_elems elems;
1858 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1859 u8 *pos;
1860 int i, j;
1861 DECLARE_MAC_BUF(mac);
1862 bool have_higher_than_11mbit = false;
1863
1864 /* AssocResp and ReassocResp have identical structure, so process both
1865 * of them in this function. */
1866
1867 if (ifsta->state != IEEE80211_ASSOCIATE) {
1868 printk(KERN_DEBUG "%s: association frame received from "
1869 "%s, but not in associate state - ignored\n",
1870 dev->name, print_mac(mac, mgmt->sa));
1871 return;
1872 }
1873
1874 if (len < 24 + 6) {
1875 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1876 "received from %s - ignored\n",
1877 dev->name, len, print_mac(mac, mgmt->sa));
1878 return;
1879 }
1880
1881 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1882 printk(KERN_DEBUG "%s: association frame received from "
1883 "unknown AP (SA=%s BSSID=%s) - "
1884 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1885 print_mac(mac, mgmt->bssid));
1886 return;
1887 }
1888
1889 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1890 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1891 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1892
1893 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1894 "status=%d aid=%d)\n",
1895 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1896 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1897
1898 if (status_code != WLAN_STATUS_SUCCESS) {
1899 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1900 dev->name, status_code);
1901 /* if this was a reassociation, ensure we try a "full"
1902 * association next time. This works around some broken APs
1903 * which do not correctly reject reassociation requests. */
1904 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1905 return;
1906 }
1907
1908 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1909 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1910 "set\n", dev->name, aid);
1911 aid &= ~(BIT(15) | BIT(14));
1912
1913 pos = mgmt->u.assoc_resp.variable;
1914 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1915
1916 if (!elems.supp_rates) {
1917 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1918 dev->name);
1919 return;
1920 }
1921
1922 printk(KERN_DEBUG "%s: associated\n", dev->name);
1923 ifsta->aid = aid;
1924 ifsta->ap_capab = capab_info;
1925
1926 kfree(ifsta->assocresp_ies);
1927 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1928 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1929 if (ifsta->assocresp_ies)
1930 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1931
1932 rcu_read_lock();
1933
1934 /* Add STA entry for the AP */
1935 sta = sta_info_get(local, ifsta->bssid);
1936 if (!sta) {
1937 struct ieee80211_sta_bss *bss;
1938 int err;
1939
1940 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1941 if (!sta) {
1942 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1943 " the AP\n", dev->name);
1944 rcu_read_unlock();
1945 return;
1946 }
1947 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1948 local->hw.conf.channel->center_freq,
1949 ifsta->ssid, ifsta->ssid_len);
1950 if (bss) {
1951 sta->last_rssi = bss->rssi;
1952 sta->last_signal = bss->signal;
1953 sta->last_noise = bss->noise;
1954 ieee80211_rx_bss_put(dev, bss);
1955 }
1956
1957 err = sta_info_insert(sta);
1958 if (err) {
1959 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1960 " the AP (error %d)\n", dev->name, err);
1961 rcu_read_unlock();
1962 return;
1963 }
1964 }
1965
1966 /*
1967 * FIXME: Do we really need to update the sta_info's information here?
1968 * We already know about the AP (we found it in our list) so it
1969 * should already be filled with the right info, no?
1970 * As is stands, all this is racy because typically we assume
1971 * the information that is filled in here (except flags) doesn't
1972 * change while a STA structure is alive. As such, it should move
1973 * to between the sta_info_alloc() and sta_info_insert() above.
1974 */
1975
1976 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1977 WLAN_STA_AUTHORIZED;
1978
1979 rates = 0;
1980 basic_rates = 0;
1981 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1982
1983 for (i = 0; i < elems.supp_rates_len; i++) {
1984 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1985
1986 if (rate > 110)
1987 have_higher_than_11mbit = true;
1988
1989 for (j = 0; j < sband->n_bitrates; j++) {
1990 if (sband->bitrates[j].bitrate == rate)
1991 rates |= BIT(j);
1992 if (elems.supp_rates[i] & 0x80)
1993 basic_rates |= BIT(j);
1994 }
1995 }
1996
1997 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1998 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1999
2000 if (rate > 110)
2001 have_higher_than_11mbit = true;
2002
2003 for (j = 0; j < sband->n_bitrates; j++) {
2004 if (sband->bitrates[j].bitrate == rate)
2005 rates |= BIT(j);
2006 if (elems.ext_supp_rates[i] & 0x80)
2007 basic_rates |= BIT(j);
2008 }
2009 }
2010
2011 sta->supp_rates[local->hw.conf.channel->band] = rates;
2012 sdata->basic_rates = basic_rates;
2013
2014 /* cf. IEEE 802.11 9.2.12 */
2015 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2016 have_higher_than_11mbit)
2017 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2018 else
2019 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2020
2021 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2022 struct ieee80211_ht_bss_info bss_info;
2023 ieee80211_ht_cap_ie_to_ht_info(
2024 (struct ieee80211_ht_cap *)
2025 elems.ht_cap_elem, &sta->ht_info);
2026 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2027 (struct ieee80211_ht_addt_info *)
2028 elems.ht_info_elem, &bss_info);
2029 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2030 }
2031
2032 rate_control_rate_init(sta, local);
2033
2034 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2035 sta->flags |= WLAN_STA_WME;
2036 rcu_read_unlock();
2037 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2038 elems.wmm_param_len);
2039 } else
2040 rcu_read_unlock();
2041
2042 /* set AID and assoc capability,
2043 * ieee80211_set_associated() will tell the driver */
2044 bss_conf->aid = aid;
2045 bss_conf->assoc_capability = capab_info;
2046 ieee80211_set_associated(dev, ifsta, 1);
2047
2048 ieee80211_associated(dev, ifsta);
2049 }
2050
2051
2052 /* Caller must hold local->sta_bss_lock */
2053 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2054 struct ieee80211_sta_bss *bss)
2055 {
2056 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2057 u8 hash_idx;
2058
2059 if (bss_mesh_cfg(bss))
2060 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2061 bss_mesh_id_len(bss));
2062 else
2063 hash_idx = STA_HASH(bss->bssid);
2064
2065 bss->hnext = local->sta_bss_hash[hash_idx];
2066 local->sta_bss_hash[hash_idx] = bss;
2067 }
2068
2069
2070 /* Caller must hold local->sta_bss_lock */
2071 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2072 struct ieee80211_sta_bss *bss)
2073 {
2074 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2075 struct ieee80211_sta_bss *b, *prev = NULL;
2076 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2077 while (b) {
2078 if (b == bss) {
2079 if (!prev)
2080 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2081 bss->hnext;
2082 else
2083 prev->hnext = bss->hnext;
2084 break;
2085 }
2086 prev = b;
2087 b = b->hnext;
2088 }
2089 }
2090
2091
2092 static struct ieee80211_sta_bss *
2093 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2094 u8 *ssid, u8 ssid_len)
2095 {
2096 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2097 struct ieee80211_sta_bss *bss;
2098
2099 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2100 if (!bss)
2101 return NULL;
2102 atomic_inc(&bss->users);
2103 atomic_inc(&bss->users);
2104 memcpy(bss->bssid, bssid, ETH_ALEN);
2105 bss->freq = freq;
2106 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2107 memcpy(bss->ssid, ssid, ssid_len);
2108 bss->ssid_len = ssid_len;
2109 }
2110
2111 spin_lock_bh(&local->sta_bss_lock);
2112 /* TODO: order by RSSI? */
2113 list_add_tail(&bss->list, &local->sta_bss_list);
2114 __ieee80211_rx_bss_hash_add(dev, bss);
2115 spin_unlock_bh(&local->sta_bss_lock);
2116 return bss;
2117 }
2118
2119 static struct ieee80211_sta_bss *
2120 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2121 u8 *ssid, u8 ssid_len)
2122 {
2123 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2124 struct ieee80211_sta_bss *bss;
2125
2126 spin_lock_bh(&local->sta_bss_lock);
2127 bss = local->sta_bss_hash[STA_HASH(bssid)];
2128 while (bss) {
2129 if (!bss_mesh_cfg(bss) &&
2130 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2131 bss->freq == freq &&
2132 bss->ssid_len == ssid_len &&
2133 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2134 atomic_inc(&bss->users);
2135 break;
2136 }
2137 bss = bss->hnext;
2138 }
2139 spin_unlock_bh(&local->sta_bss_lock);
2140 return bss;
2141 }
2142
2143 #ifdef CONFIG_MAC80211_MESH
2144 static struct ieee80211_sta_bss *
2145 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2146 u8 *mesh_cfg, int freq)
2147 {
2148 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2149 struct ieee80211_sta_bss *bss;
2150
2151 spin_lock_bh(&local->sta_bss_lock);
2152 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2153 while (bss) {
2154 if (bss_mesh_cfg(bss) &&
2155 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2156 bss->freq == freq &&
2157 mesh_id_len == bss->mesh_id_len &&
2158 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2159 mesh_id_len))) {
2160 atomic_inc(&bss->users);
2161 break;
2162 }
2163 bss = bss->hnext;
2164 }
2165 spin_unlock_bh(&local->sta_bss_lock);
2166 return bss;
2167 }
2168
2169 static struct ieee80211_sta_bss *
2170 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2171 u8 *mesh_cfg, int mesh_config_len, int freq)
2172 {
2173 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2174 struct ieee80211_sta_bss *bss;
2175
2176 if (mesh_config_len != MESH_CFG_LEN)
2177 return NULL;
2178
2179 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2180 if (!bss)
2181 return NULL;
2182
2183 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2184 if (!bss->mesh_cfg) {
2185 kfree(bss);
2186 return NULL;
2187 }
2188
2189 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2190 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2191 if (!bss->mesh_id) {
2192 kfree(bss->mesh_cfg);
2193 kfree(bss);
2194 return NULL;
2195 }
2196 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2197 }
2198
2199 atomic_inc(&bss->users);
2200 atomic_inc(&bss->users);
2201 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2202 bss->mesh_id_len = mesh_id_len;
2203 bss->freq = freq;
2204 spin_lock_bh(&local->sta_bss_lock);
2205 /* TODO: order by RSSI? */
2206 list_add_tail(&bss->list, &local->sta_bss_list);
2207 __ieee80211_rx_bss_hash_add(dev, bss);
2208 spin_unlock_bh(&local->sta_bss_lock);
2209 return bss;
2210 }
2211 #endif
2212
2213 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2214 {
2215 kfree(bss->wpa_ie);
2216 kfree(bss->rsn_ie);
2217 kfree(bss->wmm_ie);
2218 kfree(bss->ht_ie);
2219 kfree(bss_mesh_id(bss));
2220 kfree(bss_mesh_cfg(bss));
2221 kfree(bss);
2222 }
2223
2224
2225 static void ieee80211_rx_bss_put(struct net_device *dev,
2226 struct ieee80211_sta_bss *bss)
2227 {
2228 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2229 if (!atomic_dec_and_test(&bss->users))
2230 return;
2231
2232 spin_lock_bh(&local->sta_bss_lock);
2233 __ieee80211_rx_bss_hash_del(dev, bss);
2234 list_del(&bss->list);
2235 spin_unlock_bh(&local->sta_bss_lock);
2236 ieee80211_rx_bss_free(bss);
2237 }
2238
2239
2240 void ieee80211_rx_bss_list_init(struct net_device *dev)
2241 {
2242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2243 spin_lock_init(&local->sta_bss_lock);
2244 INIT_LIST_HEAD(&local->sta_bss_list);
2245 }
2246
2247
2248 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2249 {
2250 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2251 struct ieee80211_sta_bss *bss, *tmp;
2252
2253 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2254 ieee80211_rx_bss_put(dev, bss);
2255 }
2256
2257
2258 static int ieee80211_sta_join_ibss(struct net_device *dev,
2259 struct ieee80211_if_sta *ifsta,
2260 struct ieee80211_sta_bss *bss)
2261 {
2262 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2263 int res, rates, i, j;
2264 struct sk_buff *skb;
2265 struct ieee80211_mgmt *mgmt;
2266 struct ieee80211_tx_control control;
2267 struct rate_selection ratesel;
2268 u8 *pos;
2269 struct ieee80211_sub_if_data *sdata;
2270 struct ieee80211_supported_band *sband;
2271
2272 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2273
2274 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2275
2276 /* Remove possible STA entries from other IBSS networks. */
2277 sta_info_flush_delayed(sdata);
2278
2279 if (local->ops->reset_tsf) {
2280 /* Reset own TSF to allow time synchronization work. */
2281 local->ops->reset_tsf(local_to_hw(local));
2282 }
2283 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2284 res = ieee80211_if_config(dev);
2285 if (res)
2286 return res;
2287
2288 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2289
2290 sdata->drop_unencrypted = bss->capability &
2291 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2292
2293 res = ieee80211_set_freq(local, bss->freq);
2294
2295 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2296 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2297 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2298 return -1;
2299 }
2300
2301 /* Set beacon template */
2302 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2303 do {
2304 if (!skb)
2305 break;
2306
2307 skb_reserve(skb, local->hw.extra_tx_headroom);
2308
2309 mgmt = (struct ieee80211_mgmt *)
2310 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2311 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2312 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2313 IEEE80211_STYPE_BEACON);
2314 memset(mgmt->da, 0xff, ETH_ALEN);
2315 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2316 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2317 mgmt->u.beacon.beacon_int =
2318 cpu_to_le16(local->hw.conf.beacon_int);
2319 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2320
2321 pos = skb_put(skb, 2 + ifsta->ssid_len);
2322 *pos++ = WLAN_EID_SSID;
2323 *pos++ = ifsta->ssid_len;
2324 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2325
2326 rates = bss->supp_rates_len;
2327 if (rates > 8)
2328 rates = 8;
2329 pos = skb_put(skb, 2 + rates);
2330 *pos++ = WLAN_EID_SUPP_RATES;
2331 *pos++ = rates;
2332 memcpy(pos, bss->supp_rates, rates);
2333
2334 if (bss->band == IEEE80211_BAND_2GHZ) {
2335 pos = skb_put(skb, 2 + 1);
2336 *pos++ = WLAN_EID_DS_PARAMS;
2337 *pos++ = 1;
2338 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2339 }
2340
2341 pos = skb_put(skb, 2 + 2);
2342 *pos++ = WLAN_EID_IBSS_PARAMS;
2343 *pos++ = 2;
2344 /* FIX: set ATIM window based on scan results */
2345 *pos++ = 0;
2346 *pos++ = 0;
2347
2348 if (bss->supp_rates_len > 8) {
2349 rates = bss->supp_rates_len - 8;
2350 pos = skb_put(skb, 2 + rates);
2351 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2352 *pos++ = rates;
2353 memcpy(pos, &bss->supp_rates[8], rates);
2354 }
2355
2356 memset(&control, 0, sizeof(control));
2357 rate_control_get_rate(dev, sband, skb, &ratesel);
2358 if (!ratesel.rate) {
2359 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2360 "for IBSS beacon\n", dev->name);
2361 break;
2362 }
2363 control.vif = &sdata->vif;
2364 control.tx_rate = ratesel.rate;
2365 if (sdata->bss_conf.use_short_preamble &&
2366 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2367 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2368 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2369 control.flags |= IEEE80211_TXCTL_NO_ACK;
2370 control.retry_limit = 1;
2371
2372 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2373 if (ifsta->probe_resp) {
2374 mgmt = (struct ieee80211_mgmt *)
2375 ifsta->probe_resp->data;
2376 mgmt->frame_control =
2377 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2378 IEEE80211_STYPE_PROBE_RESP);
2379 } else {
2380 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2381 "template for IBSS\n", dev->name);
2382 }
2383
2384 if (local->ops->beacon_update &&
2385 local->ops->beacon_update(local_to_hw(local),
2386 skb, &control) == 0) {
2387 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2388 "template\n", dev->name);
2389 skb = NULL;
2390 }
2391
2392 rates = 0;
2393 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2394 for (i = 0; i < bss->supp_rates_len; i++) {
2395 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2396 for (j = 0; j < sband->n_bitrates; j++)
2397 if (sband->bitrates[j].bitrate == bitrate)
2398 rates |= BIT(j);
2399 }
2400 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2401
2402 ieee80211_sta_def_wmm_params(dev, bss, 1);
2403 } while (0);
2404
2405 if (skb) {
2406 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2407 "template\n", dev->name);
2408 dev_kfree_skb(skb);
2409 }
2410
2411 ifsta->state = IEEE80211_IBSS_JOINED;
2412 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2413
2414 ieee80211_rx_bss_put(dev, bss);
2415
2416 return res;
2417 }
2418
2419 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2420 struct ieee802_11_elems *elems,
2421 enum ieee80211_band band)
2422 {
2423 struct ieee80211_supported_band *sband;
2424 struct ieee80211_rate *bitrates;
2425 size_t num_rates;
2426 u64 supp_rates;
2427 int i, j;
2428 sband = local->hw.wiphy->bands[band];
2429
2430 if (!sband) {
2431 WARN_ON(1);
2432 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2433 }
2434
2435 bitrates = sband->bitrates;
2436 num_rates = sband->n_bitrates;
2437 supp_rates = 0;
2438 for (i = 0; i < elems->supp_rates_len +
2439 elems->ext_supp_rates_len; i++) {
2440 u8 rate = 0;
2441 int own_rate;
2442 if (i < elems->supp_rates_len)
2443 rate = elems->supp_rates[i];
2444 else if (elems->ext_supp_rates)
2445 rate = elems->ext_supp_rates
2446 [i - elems->supp_rates_len];
2447 own_rate = 5 * (rate & 0x7f);
2448 for (j = 0; j < num_rates; j++)
2449 if (bitrates[j].bitrate == own_rate)
2450 supp_rates |= BIT(j);
2451 }
2452 return supp_rates;
2453 }
2454
2455
2456 static void ieee80211_rx_bss_info(struct net_device *dev,
2457 struct ieee80211_mgmt *mgmt,
2458 size_t len,
2459 struct ieee80211_rx_status *rx_status,
2460 int beacon)
2461 {
2462 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2463 struct ieee802_11_elems elems;
2464 size_t baselen;
2465 int freq, clen;
2466 struct ieee80211_sta_bss *bss;
2467 struct sta_info *sta;
2468 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2469 u64 beacon_timestamp, rx_timestamp;
2470 struct ieee80211_channel *channel;
2471 DECLARE_MAC_BUF(mac);
2472 DECLARE_MAC_BUF(mac2);
2473
2474 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2475 return; /* ignore ProbeResp to foreign address */
2476
2477 #if 0
2478 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2479 dev->name, beacon ? "Beacon" : "Probe Response",
2480 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2481 #endif
2482
2483 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2484 if (baselen > len)
2485 return;
2486
2487 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2488 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2489
2490 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2491 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2492 u64 rates = ieee80211_sta_get_rates(local, &elems,
2493 rx_status->band);
2494
2495 mesh_neighbour_update(mgmt->sa, rates, dev,
2496 mesh_peer_accepts_plinks(&elems, dev));
2497 }
2498
2499 rcu_read_lock();
2500
2501 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2502 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2503 (sta = sta_info_get(local, mgmt->sa))) {
2504 u64 prev_rates;
2505 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2506 rx_status->band);
2507
2508 prev_rates = sta->supp_rates[rx_status->band];
2509 sta->supp_rates[rx_status->band] &= supp_rates;
2510 if (sta->supp_rates[rx_status->band] == 0) {
2511 /* No matching rates - this should not really happen.
2512 * Make sure that at least one rate is marked
2513 * supported to avoid issues with TX rate ctrl. */
2514 sta->supp_rates[rx_status->band] =
2515 sdata->u.sta.supp_rates_bits[rx_status->band];
2516 }
2517 if (sta->supp_rates[rx_status->band] != prev_rates) {
2518 printk(KERN_DEBUG "%s: updated supp_rates set for "
2519 "%s based on beacon info (0x%llx & 0x%llx -> "
2520 "0x%llx)\n",
2521 dev->name, print_mac(mac, sta->addr),
2522 (unsigned long long) prev_rates,
2523 (unsigned long long) supp_rates,
2524 (unsigned long long) sta->supp_rates[rx_status->band]);
2525 }
2526 }
2527
2528 rcu_read_unlock();
2529
2530 if (elems.ds_params && elems.ds_params_len == 1)
2531 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2532 else
2533 freq = rx_status->freq;
2534
2535 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2536
2537 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2538 return;
2539
2540 #ifdef CONFIG_MAC80211_MESH
2541 if (elems.mesh_config)
2542 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2543 elems.mesh_id_len, elems.mesh_config, freq);
2544 else
2545 #endif
2546 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2547 elems.ssid, elems.ssid_len);
2548 if (!bss) {
2549 #ifdef CONFIG_MAC80211_MESH
2550 if (elems.mesh_config)
2551 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2552 elems.mesh_id_len, elems.mesh_config,
2553 elems.mesh_config_len, freq);
2554 else
2555 #endif
2556 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2557 elems.ssid, elems.ssid_len);
2558 if (!bss)
2559 return;
2560 } else {
2561 #if 0
2562 /* TODO: order by RSSI? */
2563 spin_lock_bh(&local->sta_bss_lock);
2564 list_move_tail(&bss->list, &local->sta_bss_list);
2565 spin_unlock_bh(&local->sta_bss_lock);
2566 #endif
2567 }
2568
2569 bss->band = rx_status->band;
2570
2571 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2572 bss->probe_resp && beacon) {
2573 /* STA mode:
2574 * Do not allow beacon to override data from Probe Response. */
2575 ieee80211_rx_bss_put(dev, bss);
2576 return;
2577 }
2578
2579 /* save the ERP value so that it is available at association time */
2580 if (elems.erp_info && elems.erp_info_len >= 1) {
2581 bss->erp_value = elems.erp_info[0];
2582 bss->has_erp_value = 1;
2583 }
2584
2585 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2586 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2587
2588 bss->supp_rates_len = 0;
2589 if (elems.supp_rates) {
2590 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2591 if (clen > elems.supp_rates_len)
2592 clen = elems.supp_rates_len;
2593 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2594 clen);
2595 bss->supp_rates_len += clen;
2596 }
2597 if (elems.ext_supp_rates) {
2598 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2599 if (clen > elems.ext_supp_rates_len)
2600 clen = elems.ext_supp_rates_len;
2601 memcpy(&bss->supp_rates[bss->supp_rates_len],
2602 elems.ext_supp_rates, clen);
2603 bss->supp_rates_len += clen;
2604 }
2605
2606 if (elems.wpa &&
2607 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2608 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2609 kfree(bss->wpa_ie);
2610 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2611 if (bss->wpa_ie) {
2612 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2613 bss->wpa_ie_len = elems.wpa_len + 2;
2614 } else
2615 bss->wpa_ie_len = 0;
2616 } else if (!elems.wpa && bss->wpa_ie) {
2617 kfree(bss->wpa_ie);
2618 bss->wpa_ie = NULL;
2619 bss->wpa_ie_len = 0;
2620 }
2621
2622 if (elems.rsn &&
2623 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2624 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2625 kfree(bss->rsn_ie);
2626 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2627 if (bss->rsn_ie) {
2628 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2629 bss->rsn_ie_len = elems.rsn_len + 2;
2630 } else
2631 bss->rsn_ie_len = 0;
2632 } else if (!elems.rsn && bss->rsn_ie) {
2633 kfree(bss->rsn_ie);
2634 bss->rsn_ie = NULL;
2635 bss->rsn_ie_len = 0;
2636 }
2637
2638 if (elems.wmm_param &&
2639 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2640 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2641 kfree(bss->wmm_ie);
2642 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2643 if (bss->wmm_ie) {
2644 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2645 elems.wmm_param_len + 2);
2646 bss->wmm_ie_len = elems.wmm_param_len + 2;
2647 } else
2648 bss->wmm_ie_len = 0;
2649 } else if (!elems.wmm_param && bss->wmm_ie) {
2650 kfree(bss->wmm_ie);
2651 bss->wmm_ie = NULL;
2652 bss->wmm_ie_len = 0;
2653 }
2654 if (elems.ht_cap_elem &&
2655 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2656 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2657 kfree(bss->ht_ie);
2658 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2659 if (bss->ht_ie) {
2660 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2661 elems.ht_cap_elem_len + 2);
2662 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2663 } else
2664 bss->ht_ie_len = 0;
2665 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2666 kfree(bss->ht_ie);
2667 bss->ht_ie = NULL;
2668 bss->ht_ie_len = 0;
2669 }
2670
2671 bss->timestamp = beacon_timestamp;
2672 bss->last_update = jiffies;
2673 bss->rssi = rx_status->ssi;
2674 bss->signal = rx_status->signal;
2675 bss->noise = rx_status->noise;
2676 if (!beacon)
2677 bss->probe_resp++;
2678
2679 /* check if we need to merge IBSS */
2680 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2681 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2682 bss->capability & WLAN_CAPABILITY_IBSS &&
2683 bss->freq == local->oper_channel->center_freq &&
2684 elems.ssid_len == sdata->u.sta.ssid_len &&
2685 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2686 if (rx_status->flag & RX_FLAG_TSFT) {
2687 /* in order for correct IBSS merging we need mactime
2688 *
2689 * since mactime is defined as the time the first data
2690 * symbol of the frame hits the PHY, and the timestamp
2691 * of the beacon is defined as "the time that the data
2692 * symbol containing the first bit of the timestamp is
2693 * transmitted to the PHY plus the transmitting STA’s
2694 * delays through its local PHY from the MAC-PHY
2695 * interface to its interface with the WM"
2696 * (802.11 11.1.2) - equals the time this bit arrives at
2697 * the receiver - we have to take into account the
2698 * offset between the two.
2699 * e.g: at 1 MBit that means mactime is 192 usec earlier
2700 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2701 */
2702 int rate = local->hw.wiphy->bands[rx_status->band]->
2703 bitrates[rx_status->rate_idx].bitrate;
2704 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2705 } else if (local && local->ops && local->ops->get_tsf)
2706 /* second best option: get current TSF */
2707 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2708 else
2709 /* can't merge without knowing the TSF */
2710 rx_timestamp = -1LLU;
2711 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2712 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2713 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2714 print_mac(mac, mgmt->sa),
2715 print_mac(mac2, mgmt->bssid),
2716 (unsigned long long)rx_timestamp,
2717 (unsigned long long)beacon_timestamp,
2718 (unsigned long long)(rx_timestamp - beacon_timestamp),
2719 jiffies);
2720 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2721 if (beacon_timestamp > rx_timestamp) {
2722 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2723 if (net_ratelimit())
2724 #endif
2725 printk(KERN_DEBUG "%s: beacon TSF higher than "
2726 "local TSF - IBSS merge with BSSID %s\n",
2727 dev->name, print_mac(mac, mgmt->bssid));
2728 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2729 ieee80211_ibss_add_sta(dev, NULL,
2730 mgmt->bssid, mgmt->sa);
2731 }
2732 }
2733
2734 ieee80211_rx_bss_put(dev, bss);
2735 }
2736
2737
2738 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2739 struct ieee80211_mgmt *mgmt,
2740 size_t len,
2741 struct ieee80211_rx_status *rx_status)
2742 {
2743 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2744 }
2745
2746
2747 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2748 struct ieee80211_mgmt *mgmt,
2749 size_t len,
2750 struct ieee80211_rx_status *rx_status)
2751 {
2752 struct ieee80211_sub_if_data *sdata;
2753 struct ieee80211_if_sta *ifsta;
2754 size_t baselen;
2755 struct ieee802_11_elems elems;
2756 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2757 struct ieee80211_conf *conf = &local->hw.conf;
2758 u32 changed = 0;
2759
2760 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2761
2762 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2763 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2764 return;
2765 ifsta = &sdata->u.sta;
2766
2767 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2768 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2769 return;
2770
2771 /* Process beacon from the current BSS */
2772 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2773 if (baselen > len)
2774 return;
2775
2776 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2777
2778 if (elems.erp_info && elems.erp_info_len >= 1)
2779 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2780
2781 if (elems.ht_cap_elem && elems.ht_info_elem &&
2782 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2783 struct ieee80211_ht_bss_info bss_info;
2784
2785 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2786 (struct ieee80211_ht_addt_info *)
2787 elems.ht_info_elem, &bss_info);
2788 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2789 &bss_info);
2790 }
2791
2792 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2793 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2794 elems.wmm_param_len);
2795 }
2796
2797 ieee80211_bss_info_change_notify(sdata, changed);
2798 }
2799
2800
2801 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2802 struct ieee80211_if_sta *ifsta,
2803 struct ieee80211_mgmt *mgmt,
2804 size_t len,
2805 struct ieee80211_rx_status *rx_status)
2806 {
2807 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2808 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2809 int tx_last_beacon;
2810 struct sk_buff *skb;
2811 struct ieee80211_mgmt *resp;
2812 u8 *pos, *end;
2813 DECLARE_MAC_BUF(mac);
2814 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2815 DECLARE_MAC_BUF(mac2);
2816 DECLARE_MAC_BUF(mac3);
2817 #endif
2818
2819 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2820 ifsta->state != IEEE80211_IBSS_JOINED ||
2821 len < 24 + 2 || !ifsta->probe_resp)
2822 return;
2823
2824 if (local->ops->tx_last_beacon)
2825 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2826 else
2827 tx_last_beacon = 1;
2828
2829 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2830 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2831 "%s (tx_last_beacon=%d)\n",
2832 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2833 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2834 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2835
2836 if (!tx_last_beacon)
2837 return;
2838
2839 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2840 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2841 return;
2842
2843 end = ((u8 *) mgmt) + len;
2844 pos = mgmt->u.probe_req.variable;
2845 if (pos[0] != WLAN_EID_SSID ||
2846 pos + 2 + pos[1] > end) {
2847 if (net_ratelimit()) {
2848 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2849 "from %s\n",
2850 dev->name, print_mac(mac, mgmt->sa));
2851 }
2852 return;
2853 }
2854 if (pos[1] != 0 &&
2855 (pos[1] != ifsta->ssid_len ||
2856 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2857 /* Ignore ProbeReq for foreign SSID */
2858 return;
2859 }
2860
2861 /* Reply with ProbeResp */
2862 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2863 if (!skb)
2864 return;
2865
2866 resp = (struct ieee80211_mgmt *) skb->data;
2867 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2868 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2869 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2870 dev->name, print_mac(mac, resp->da));
2871 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2872 ieee80211_sta_tx(dev, skb, 0);
2873 }
2874
2875 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2876 struct ieee80211_if_sta *ifsta,
2877 struct ieee80211_mgmt *mgmt,
2878 size_t len,
2879 struct ieee80211_rx_status *rx_status)
2880 {
2881 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2882
2883 if (len < IEEE80211_MIN_ACTION_SIZE)
2884 return;
2885
2886 switch (mgmt->u.action.category) {
2887 case WLAN_CATEGORY_BACK:
2888 switch (mgmt->u.action.u.addba_req.action_code) {
2889 case WLAN_ACTION_ADDBA_REQ:
2890 if (len < (IEEE80211_MIN_ACTION_SIZE +
2891 sizeof(mgmt->u.action.u.addba_req)))
2892 break;
2893 ieee80211_sta_process_addba_request(dev, mgmt, len);
2894 break;
2895 case WLAN_ACTION_ADDBA_RESP:
2896 if (len < (IEEE80211_MIN_ACTION_SIZE +
2897 sizeof(mgmt->u.action.u.addba_resp)))
2898 break;
2899 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2900 break;
2901 case WLAN_ACTION_DELBA:
2902 if (len < (IEEE80211_MIN_ACTION_SIZE +
2903 sizeof(mgmt->u.action.u.delba)))
2904 break;
2905 ieee80211_sta_process_delba(dev, mgmt, len);
2906 break;
2907 default:
2908 if (net_ratelimit())
2909 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2910 dev->name);
2911 break;
2912 }
2913 break;
2914 case PLINK_CATEGORY:
2915 if (ieee80211_vif_is_mesh(&sdata->vif))
2916 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2917 break;
2918 case MESH_PATH_SEL_CATEGORY:
2919 if (ieee80211_vif_is_mesh(&sdata->vif))
2920 mesh_rx_path_sel_frame(dev, mgmt, len);
2921 break;
2922 default:
2923 if (net_ratelimit())
2924 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2925 "category=%d\n", dev->name, mgmt->u.action.category);
2926 break;
2927 }
2928 }
2929
2930 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2931 struct ieee80211_rx_status *rx_status)
2932 {
2933 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2934 struct ieee80211_sub_if_data *sdata;
2935 struct ieee80211_if_sta *ifsta;
2936 struct ieee80211_mgmt *mgmt;
2937 u16 fc;
2938
2939 if (skb->len < 24)
2940 goto fail;
2941
2942 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2943 ifsta = &sdata->u.sta;
2944
2945 mgmt = (struct ieee80211_mgmt *) skb->data;
2946 fc = le16_to_cpu(mgmt->frame_control);
2947
2948 switch (fc & IEEE80211_FCTL_STYPE) {
2949 case IEEE80211_STYPE_PROBE_REQ:
2950 case IEEE80211_STYPE_PROBE_RESP:
2951 case IEEE80211_STYPE_BEACON:
2952 case IEEE80211_STYPE_ACTION:
2953 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2954 case IEEE80211_STYPE_AUTH:
2955 case IEEE80211_STYPE_ASSOC_RESP:
2956 case IEEE80211_STYPE_REASSOC_RESP:
2957 case IEEE80211_STYPE_DEAUTH:
2958 case IEEE80211_STYPE_DISASSOC:
2959 skb_queue_tail(&ifsta->skb_queue, skb);
2960 queue_work(local->hw.workqueue, &ifsta->work);
2961 return;
2962 default:
2963 printk(KERN_DEBUG "%s: received unknown management frame - "
2964 "stype=%d\n", dev->name,
2965 (fc & IEEE80211_FCTL_STYPE) >> 4);
2966 break;
2967 }
2968
2969 fail:
2970 kfree_skb(skb);
2971 }
2972
2973
2974 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2975 struct sk_buff *skb)
2976 {
2977 struct ieee80211_rx_status *rx_status;
2978 struct ieee80211_sub_if_data *sdata;
2979 struct ieee80211_if_sta *ifsta;
2980 struct ieee80211_mgmt *mgmt;
2981 u16 fc;
2982
2983 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2984 ifsta = &sdata->u.sta;
2985
2986 rx_status = (struct ieee80211_rx_status *) skb->cb;
2987 mgmt = (struct ieee80211_mgmt *) skb->data;
2988 fc = le16_to_cpu(mgmt->frame_control);
2989
2990 switch (fc & IEEE80211_FCTL_STYPE) {
2991 case IEEE80211_STYPE_PROBE_REQ:
2992 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2993 rx_status);
2994 break;
2995 case IEEE80211_STYPE_PROBE_RESP:
2996 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2997 break;
2998 case IEEE80211_STYPE_BEACON:
2999 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3000 break;
3001 case IEEE80211_STYPE_AUTH:
3002 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3003 break;
3004 case IEEE80211_STYPE_ASSOC_RESP:
3005 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3006 break;
3007 case IEEE80211_STYPE_REASSOC_RESP:
3008 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3009 break;
3010 case IEEE80211_STYPE_DEAUTH:
3011 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3012 break;
3013 case IEEE80211_STYPE_DISASSOC:
3014 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3015 break;
3016 case IEEE80211_STYPE_ACTION:
3017 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3018 break;
3019 }
3020
3021 kfree_skb(skb);
3022 }
3023
3024
3025 ieee80211_rx_result
3026 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3027 struct ieee80211_rx_status *rx_status)
3028 {
3029 struct ieee80211_mgmt *mgmt;
3030 u16 fc;
3031
3032 if (skb->len < 2)
3033 return RX_DROP_UNUSABLE;
3034
3035 mgmt = (struct ieee80211_mgmt *) skb->data;
3036 fc = le16_to_cpu(mgmt->frame_control);
3037
3038 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3039 return RX_CONTINUE;
3040
3041 if (skb->len < 24)
3042 return RX_DROP_MONITOR;
3043
3044 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3045 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3046 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3047 skb->len, rx_status);
3048 dev_kfree_skb(skb);
3049 return RX_QUEUED;
3050 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3051 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3052 rx_status);
3053 dev_kfree_skb(skb);
3054 return RX_QUEUED;
3055 }
3056 }
3057 return RX_CONTINUE;
3058 }
3059
3060
3061 static int ieee80211_sta_active_ibss(struct net_device *dev)
3062 {
3063 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3064 int active = 0;
3065 struct sta_info *sta;
3066 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3067
3068 rcu_read_lock();
3069
3070 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3071 if (sta->sdata == sdata &&
3072 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3073 jiffies)) {
3074 active++;
3075 break;
3076 }
3077 }
3078
3079 rcu_read_unlock();
3080
3081 return active;
3082 }
3083
3084
3085 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3086 {
3087 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3088 struct sta_info *sta, *tmp;
3089 LIST_HEAD(tmp_list);
3090 DECLARE_MAC_BUF(mac);
3091 unsigned long flags;
3092
3093 spin_lock_irqsave(&local->sta_lock, flags);
3094 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3095 if (time_after(jiffies, sta->last_rx + exp_time)) {
3096 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3097 dev->name, print_mac(mac, sta->addr));
3098 __sta_info_unlink(&sta);
3099 if (sta)
3100 list_add(&sta->list, &tmp_list);
3101 }
3102 spin_unlock_irqrestore(&local->sta_lock, flags);
3103
3104 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3105 sta_info_destroy(sta);
3106 }
3107
3108
3109 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3110 struct ieee80211_if_sta *ifsta)
3111 {
3112 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3113
3114 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3115 if (ieee80211_sta_active_ibss(dev))
3116 return;
3117
3118 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3119 "IBSS networks with same SSID (merge)\n", dev->name);
3120 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3121 }
3122
3123
3124 #ifdef CONFIG_MAC80211_MESH
3125 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3126 struct ieee80211_if_sta *ifsta)
3127 {
3128 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3129 bool free_plinks;
3130
3131 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3132 mesh_path_expire(dev);
3133
3134 free_plinks = mesh_plink_availables(sdata);
3135 if (free_plinks != sdata->u.sta.accepting_plinks)
3136 ieee80211_if_config_beacon(dev);
3137
3138 mod_timer(&ifsta->timer, jiffies +
3139 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3140 }
3141
3142
3143 void ieee80211_start_mesh(struct net_device *dev)
3144 {
3145 struct ieee80211_if_sta *ifsta;
3146 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3147 ifsta = &sdata->u.sta;
3148 ifsta->state = IEEE80211_MESH_UP;
3149 ieee80211_sta_timer((unsigned long)sdata);
3150 }
3151 #endif
3152
3153
3154 void ieee80211_sta_timer(unsigned long data)
3155 {
3156 struct ieee80211_sub_if_data *sdata =
3157 (struct ieee80211_sub_if_data *) data;
3158 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3159 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3160
3161 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3162 queue_work(local->hw.workqueue, &ifsta->work);
3163 }
3164
3165 void ieee80211_sta_work(struct work_struct *work)
3166 {
3167 struct ieee80211_sub_if_data *sdata =
3168 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3169 struct net_device *dev = sdata->dev;
3170 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3171 struct ieee80211_if_sta *ifsta;
3172 struct sk_buff *skb;
3173
3174 if (!netif_running(dev))
3175 return;
3176
3177 if (local->sta_sw_scanning || local->sta_hw_scanning)
3178 return;
3179
3180 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3181 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3182 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3183 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3184 "(type=%d)\n", dev->name, sdata->vif.type);
3185 return;
3186 }
3187 ifsta = &sdata->u.sta;
3188
3189 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3190 ieee80211_sta_rx_queued_mgmt(dev, skb);
3191
3192 #ifdef CONFIG_MAC80211_MESH
3193 if (ifsta->preq_queue_len &&
3194 time_after(jiffies,
3195 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3196 mesh_path_start_discovery(dev);
3197 #endif
3198
3199 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3200 ifsta->state != IEEE80211_ASSOCIATE &&
3201 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3202 if (ifsta->scan_ssid_len)
3203 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3204 else
3205 ieee80211_sta_start_scan(dev, NULL, 0);
3206 return;
3207 }
3208
3209 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3210 if (ieee80211_sta_config_auth(dev, ifsta))
3211 return;
3212 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3213 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3214 return;
3215
3216 switch (ifsta->state) {
3217 case IEEE80211_DISABLED:
3218 break;
3219 case IEEE80211_AUTHENTICATE:
3220 ieee80211_authenticate(dev, ifsta);
3221 break;
3222 case IEEE80211_ASSOCIATE:
3223 ieee80211_associate(dev, ifsta);
3224 break;
3225 case IEEE80211_ASSOCIATED:
3226 ieee80211_associated(dev, ifsta);
3227 break;
3228 case IEEE80211_IBSS_SEARCH:
3229 ieee80211_sta_find_ibss(dev, ifsta);
3230 break;
3231 case IEEE80211_IBSS_JOINED:
3232 ieee80211_sta_merge_ibss(dev, ifsta);
3233 break;
3234 #ifdef CONFIG_MAC80211_MESH
3235 case IEEE80211_MESH_UP:
3236 ieee80211_mesh_housekeeping(dev, ifsta);
3237 break;
3238 #endif
3239 default:
3240 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3241 ifsta->state);
3242 break;
3243 }
3244
3245 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3246 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3247 "mixed-cell disabled - disassociate\n", dev->name);
3248
3249 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3250 ieee80211_set_disassoc(dev, ifsta, 0);
3251 }
3252 }
3253
3254
3255 static void ieee80211_sta_reset_auth(struct net_device *dev,
3256 struct ieee80211_if_sta *ifsta)
3257 {
3258 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3259
3260 if (local->ops->reset_tsf) {
3261 /* Reset own TSF to allow time synchronization work. */
3262 local->ops->reset_tsf(local_to_hw(local));
3263 }
3264
3265 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3266
3267
3268 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3269 ifsta->auth_alg = WLAN_AUTH_OPEN;
3270 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3271 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3272 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3273 ifsta->auth_alg = WLAN_AUTH_LEAP;
3274 else
3275 ifsta->auth_alg = WLAN_AUTH_OPEN;
3276 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3277 ifsta->auth_alg);
3278 ifsta->auth_transaction = -1;
3279 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3280 ifsta->auth_tries = ifsta->assoc_tries = 0;
3281 netif_carrier_off(dev);
3282 }
3283
3284
3285 void ieee80211_sta_req_auth(struct net_device *dev,
3286 struct ieee80211_if_sta *ifsta)
3287 {
3288 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3289 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3290
3291 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3292 return;
3293
3294 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3295 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3296 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3297 IEEE80211_STA_AUTO_SSID_SEL))) {
3298 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3299 queue_work(local->hw.workqueue, &ifsta->work);
3300 }
3301 }
3302
3303 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3304 const char *ssid, int ssid_len)
3305 {
3306 int tmp, hidden_ssid;
3307
3308 if (ssid_len == ifsta->ssid_len &&
3309 !memcmp(ifsta->ssid, ssid, ssid_len))
3310 return 1;
3311
3312 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3313 return 0;
3314
3315 hidden_ssid = 1;
3316 tmp = ssid_len;
3317 while (tmp--) {
3318 if (ssid[tmp] != '\0') {
3319 hidden_ssid = 0;
3320 break;
3321 }
3322 }
3323
3324 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3325 return 1;
3326
3327 if (ssid_len == 1 && ssid[0] == ' ')
3328 return 1;
3329
3330 return 0;
3331 }
3332
3333 static int ieee80211_sta_config_auth(struct net_device *dev,
3334 struct ieee80211_if_sta *ifsta)
3335 {
3336 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3337 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3338 struct ieee80211_sta_bss *bss, *selected = NULL;
3339 int top_rssi = 0, freq;
3340
3341 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3342 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3343 ifsta->state = IEEE80211_AUTHENTICATE;
3344 ieee80211_sta_reset_auth(dev, ifsta);
3345 return 0;
3346 }
3347
3348 spin_lock_bh(&local->sta_bss_lock);
3349 freq = local->oper_channel->center_freq;
3350 list_for_each_entry(bss, &local->sta_bss_list, list) {
3351 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3352 continue;
3353
3354 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3355 !!sdata->default_key)
3356 continue;
3357
3358 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3359 bss->freq != freq)
3360 continue;
3361
3362 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3363 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3364 continue;
3365
3366 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3367 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3368 continue;
3369
3370 if (!selected || top_rssi < bss->rssi) {
3371 selected = bss;
3372 top_rssi = bss->rssi;
3373 }
3374 }
3375 if (selected)
3376 atomic_inc(&selected->users);
3377 spin_unlock_bh(&local->sta_bss_lock);
3378
3379 if (selected) {
3380 ieee80211_set_freq(local, selected->freq);
3381 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3382 ieee80211_sta_set_ssid(dev, selected->ssid,
3383 selected->ssid_len);
3384 ieee80211_sta_set_bssid(dev, selected->bssid);
3385 ieee80211_sta_def_wmm_params(dev, selected, 0);
3386 ieee80211_rx_bss_put(dev, selected);
3387 ifsta->state = IEEE80211_AUTHENTICATE;
3388 ieee80211_sta_reset_auth(dev, ifsta);
3389 return 0;
3390 } else {
3391 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3392 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3393 ieee80211_sta_start_scan(dev, NULL, 0);
3394 else
3395 ieee80211_sta_start_scan(dev, ifsta->ssid,
3396 ifsta->ssid_len);
3397 ifsta->state = IEEE80211_AUTHENTICATE;
3398 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3399 } else
3400 ifsta->state = IEEE80211_DISABLED;
3401 }
3402 return -1;
3403 }
3404
3405
3406 static int ieee80211_sta_create_ibss(struct net_device *dev,
3407 struct ieee80211_if_sta *ifsta)
3408 {
3409 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3410 struct ieee80211_sta_bss *bss;
3411 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3412 struct ieee80211_supported_band *sband;
3413 u8 bssid[ETH_ALEN], *pos;
3414 int i;
3415 DECLARE_MAC_BUF(mac);
3416
3417 #if 0
3418 /* Easier testing, use fixed BSSID. */
3419 memset(bssid, 0xfe, ETH_ALEN);
3420 #else
3421 /* Generate random, not broadcast, locally administered BSSID. Mix in
3422 * own MAC address to make sure that devices that do not have proper
3423 * random number generator get different BSSID. */
3424 get_random_bytes(bssid, ETH_ALEN);
3425 for (i = 0; i < ETH_ALEN; i++)
3426 bssid[i] ^= dev->dev_addr[i];
3427 bssid[0] &= ~0x01;
3428 bssid[0] |= 0x02;
3429 #endif
3430
3431 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3432 dev->name, print_mac(mac, bssid));
3433
3434 bss = ieee80211_rx_bss_add(dev, bssid,
3435 local->hw.conf.channel->center_freq,
3436 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3437 if (!bss)
3438 return -ENOMEM;
3439
3440 bss->band = local->hw.conf.channel->band;
3441 sband = local->hw.wiphy->bands[bss->band];
3442
3443 if (local->hw.conf.beacon_int == 0)
3444 local->hw.conf.beacon_int = 10000;
3445 bss->beacon_int = local->hw.conf.beacon_int;
3446 bss->last_update = jiffies;
3447 bss->capability = WLAN_CAPABILITY_IBSS;
3448 if (sdata->default_key) {
3449 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3450 } else
3451 sdata->drop_unencrypted = 0;
3452 bss->supp_rates_len = sband->n_bitrates;
3453 pos = bss->supp_rates;
3454 for (i = 0; i < sband->n_bitrates; i++) {
3455 int rate = sband->bitrates[i].bitrate;
3456 *pos++ = (u8) (rate / 5);
3457 }
3458
3459 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3460 }
3461
3462
3463 static int ieee80211_sta_find_ibss(struct net_device *dev,
3464 struct ieee80211_if_sta *ifsta)
3465 {
3466 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3467 struct ieee80211_sta_bss *bss;
3468 int found = 0;
3469 u8 bssid[ETH_ALEN];
3470 int active_ibss;
3471 DECLARE_MAC_BUF(mac);
3472 DECLARE_MAC_BUF(mac2);
3473
3474 if (ifsta->ssid_len == 0)
3475 return -EINVAL;
3476
3477 active_ibss = ieee80211_sta_active_ibss(dev);
3478 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3479 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3480 dev->name, active_ibss);
3481 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3482 spin_lock_bh(&local->sta_bss_lock);
3483 list_for_each_entry(bss, &local->sta_bss_list, list) {
3484 if (ifsta->ssid_len != bss->ssid_len ||
3485 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3486 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3487 continue;
3488 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3489 printk(KERN_DEBUG " bssid=%s found\n",
3490 print_mac(mac, bss->bssid));
3491 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3492 memcpy(bssid, bss->bssid, ETH_ALEN);
3493 found = 1;
3494 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3495 break;
3496 }
3497 spin_unlock_bh(&local->sta_bss_lock);
3498
3499 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3500 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3501 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3502 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3503 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3504 (bss = ieee80211_rx_bss_get(dev, bssid,
3505 local->hw.conf.channel->center_freq,
3506 ifsta->ssid, ifsta->ssid_len))) {
3507 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3508 " based on configured SSID\n",
3509 dev->name, print_mac(mac, bssid));
3510 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3511 }
3512 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3513 printk(KERN_DEBUG " did not try to join ibss\n");
3514 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3515
3516 /* Selected IBSS not found in current scan results - try to scan */
3517 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3518 !ieee80211_sta_active_ibss(dev)) {
3519 mod_timer(&ifsta->timer, jiffies +
3520 IEEE80211_IBSS_MERGE_INTERVAL);
3521 } else if (time_after(jiffies, local->last_scan_completed +
3522 IEEE80211_SCAN_INTERVAL)) {
3523 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3524 "join\n", dev->name);
3525 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3526 ifsta->ssid_len);
3527 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3528 int interval = IEEE80211_SCAN_INTERVAL;
3529
3530 if (time_after(jiffies, ifsta->ibss_join_req +
3531 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3532 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3533 (!(local->oper_channel->flags &
3534 IEEE80211_CHAN_NO_IBSS)))
3535 return ieee80211_sta_create_ibss(dev, ifsta);
3536 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3537 printk(KERN_DEBUG "%s: IBSS not allowed on"
3538 " %d MHz\n", dev->name,
3539 local->hw.conf.channel->center_freq);
3540 }
3541
3542 /* No IBSS found - decrease scan interval and continue
3543 * scanning. */
3544 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3545 }
3546
3547 ifsta->state = IEEE80211_IBSS_SEARCH;
3548 mod_timer(&ifsta->timer, jiffies + interval);
3549 return 0;
3550 }
3551
3552 return 0;
3553 }
3554
3555
3556 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3557 {
3558 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3559 struct ieee80211_if_sta *ifsta;
3560
3561 if (len > IEEE80211_MAX_SSID_LEN)
3562 return -EINVAL;
3563
3564 ifsta = &sdata->u.sta;
3565
3566 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3567 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3568 memcpy(ifsta->ssid, ssid, len);
3569 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3570 ifsta->ssid_len = len;
3571
3572 if (len)
3573 ifsta->flags |= IEEE80211_STA_SSID_SET;
3574 else
3575 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3576 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3577 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3578 ifsta->ibss_join_req = jiffies;
3579 ifsta->state = IEEE80211_IBSS_SEARCH;
3580 return ieee80211_sta_find_ibss(dev, ifsta);
3581 }
3582 return 0;
3583 }
3584
3585
3586 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3587 {
3588 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3589 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3590 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3591 *len = ifsta->ssid_len;
3592 return 0;
3593 }
3594
3595
3596 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3597 {
3598 struct ieee80211_sub_if_data *sdata;
3599 struct ieee80211_if_sta *ifsta;
3600 int res;
3601
3602 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3603 ifsta = &sdata->u.sta;
3604
3605 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3606 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3607 res = ieee80211_if_config(dev);
3608 if (res) {
3609 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3610 "the low-level driver\n", dev->name);
3611 return res;
3612 }
3613 }
3614
3615 if (is_valid_ether_addr(bssid))
3616 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3617 else
3618 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3619
3620 return 0;
3621 }
3622
3623
3624 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3625 struct ieee80211_sub_if_data *sdata,
3626 int powersave)
3627 {
3628 struct sk_buff *skb;
3629 struct ieee80211_hdr *nullfunc;
3630 u16 fc;
3631
3632 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3633 if (!skb) {
3634 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3635 "frame\n", sdata->dev->name);
3636 return;
3637 }
3638 skb_reserve(skb, local->hw.extra_tx_headroom);
3639
3640 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3641 memset(nullfunc, 0, 24);
3642 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3643 IEEE80211_FCTL_TODS;
3644 if (powersave)
3645 fc |= IEEE80211_FCTL_PM;
3646 nullfunc->frame_control = cpu_to_le16(fc);
3647 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3648 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3649 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3650
3651 ieee80211_sta_tx(sdata->dev, skb, 0);
3652 }
3653
3654
3655 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3656 {
3657 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3658 ieee80211_vif_is_mesh(&sdata->vif))
3659 ieee80211_sta_timer((unsigned long)sdata);
3660 }
3661
3662 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3663 {
3664 struct ieee80211_local *local = hw_to_local(hw);
3665 struct net_device *dev = local->scan_dev;
3666 struct ieee80211_sub_if_data *sdata;
3667 union iwreq_data wrqu;
3668
3669 local->last_scan_completed = jiffies;
3670 memset(&wrqu, 0, sizeof(wrqu));
3671 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3672
3673 if (local->sta_hw_scanning) {
3674 local->sta_hw_scanning = 0;
3675 if (ieee80211_hw_config(local))
3676 printk(KERN_DEBUG "%s: failed to restore operational "
3677 "channel after scan\n", dev->name);
3678 /* Restart STA timer for HW scan case */
3679 rcu_read_lock();
3680 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3681 ieee80211_restart_sta_timer(sdata);
3682 rcu_read_unlock();
3683
3684 goto done;
3685 }
3686
3687 local->sta_sw_scanning = 0;
3688 if (ieee80211_hw_config(local))
3689 printk(KERN_DEBUG "%s: failed to restore operational "
3690 "channel after scan\n", dev->name);
3691
3692
3693 netif_tx_lock_bh(local->mdev);
3694 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3695 local->ops->configure_filter(local_to_hw(local),
3696 FIF_BCN_PRBRESP_PROMISC,
3697 &local->filter_flags,
3698 local->mdev->mc_count,
3699 local->mdev->mc_list);
3700
3701 netif_tx_unlock_bh(local->mdev);
3702
3703 rcu_read_lock();
3704 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3705
3706 /* No need to wake the master device. */
3707 if (sdata->dev == local->mdev)
3708 continue;
3709
3710 /* Tell AP we're back */
3711 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3712 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3713 ieee80211_send_nullfunc(local, sdata, 0);
3714
3715 ieee80211_restart_sta_timer(sdata);
3716
3717 netif_wake_queue(sdata->dev);
3718 }
3719 rcu_read_unlock();
3720
3721 done:
3722 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3723 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3724 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3725 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3726 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3727 !ieee80211_sta_active_ibss(dev)))
3728 ieee80211_sta_find_ibss(dev, ifsta);
3729 }
3730 }
3731 EXPORT_SYMBOL(ieee80211_scan_completed);
3732
3733 void ieee80211_sta_scan_work(struct work_struct *work)
3734 {
3735 struct ieee80211_local *local =
3736 container_of(work, struct ieee80211_local, scan_work.work);
3737 struct net_device *dev = local->scan_dev;
3738 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3739 struct ieee80211_supported_band *sband;
3740 struct ieee80211_channel *chan;
3741 int skip;
3742 unsigned long next_delay = 0;
3743
3744 if (!local->sta_sw_scanning)
3745 return;
3746
3747 switch (local->scan_state) {
3748 case SCAN_SET_CHANNEL:
3749 /*
3750 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3751 * after we successfully scanned the last channel of the last
3752 * band (and the last band is supported by the hw)
3753 */
3754 if (local->scan_band < IEEE80211_NUM_BANDS)
3755 sband = local->hw.wiphy->bands[local->scan_band];
3756 else
3757 sband = NULL;
3758
3759 /*
3760 * If we are at an unsupported band and have more bands
3761 * left to scan, advance to the next supported one.
3762 */
3763 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3764 local->scan_band++;
3765 sband = local->hw.wiphy->bands[local->scan_band];
3766 local->scan_channel_idx = 0;
3767 }
3768
3769 /* if no more bands/channels left, complete scan */
3770 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3771 ieee80211_scan_completed(local_to_hw(local));
3772 return;
3773 }
3774 skip = 0;
3775 chan = &sband->channels[local->scan_channel_idx];
3776
3777 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3778 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3779 chan->flags & IEEE80211_CHAN_NO_IBSS))
3780 skip = 1;
3781
3782 if (!skip) {
3783 local->scan_channel = chan;
3784 if (ieee80211_hw_config(local)) {
3785 printk(KERN_DEBUG "%s: failed to set freq to "
3786 "%d MHz for scan\n", dev->name,
3787 chan->center_freq);
3788 skip = 1;
3789 }
3790 }
3791
3792 /* advance state machine to next channel/band */
3793 local->scan_channel_idx++;
3794 if (local->scan_channel_idx >= sband->n_channels) {
3795 /*
3796 * scan_band may end up == IEEE80211_NUM_BANDS, but
3797 * we'll catch that case above and complete the scan
3798 * if that is the case.
3799 */
3800 local->scan_band++;
3801 local->scan_channel_idx = 0;
3802 }
3803
3804 if (skip)
3805 break;
3806
3807 next_delay = IEEE80211_PROBE_DELAY +
3808 usecs_to_jiffies(local->hw.channel_change_time);
3809 local->scan_state = SCAN_SEND_PROBE;
3810 break;
3811 case SCAN_SEND_PROBE:
3812 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3813 local->scan_state = SCAN_SET_CHANNEL;
3814
3815 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3816 break;
3817 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3818 local->scan_ssid_len);
3819 next_delay = IEEE80211_CHANNEL_TIME;
3820 break;
3821 }
3822
3823 if (local->sta_sw_scanning)
3824 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3825 next_delay);
3826 }
3827
3828
3829 static int ieee80211_sta_start_scan(struct net_device *dev,
3830 u8 *ssid, size_t ssid_len)
3831 {
3832 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3833 struct ieee80211_sub_if_data *sdata;
3834
3835 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3836 return -EINVAL;
3837
3838 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3839 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3840 * BSSID: MACAddress
3841 * SSID
3842 * ScanType: ACTIVE, PASSIVE
3843 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3844 * a Probe frame during active scanning
3845 * ChannelList
3846 * MinChannelTime (>= ProbeDelay), in TU
3847 * MaxChannelTime: (>= MinChannelTime), in TU
3848 */
3849
3850 /* MLME-SCAN.confirm
3851 * BSSDescriptionSet
3852 * ResultCode: SUCCESS, INVALID_PARAMETERS
3853 */
3854
3855 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3856 if (local->scan_dev == dev)
3857 return 0;
3858 return -EBUSY;
3859 }
3860
3861 if (local->ops->hw_scan) {
3862 int rc = local->ops->hw_scan(local_to_hw(local),
3863 ssid, ssid_len);
3864 if (!rc) {
3865 local->sta_hw_scanning = 1;
3866 local->scan_dev = dev;
3867 }
3868 return rc;
3869 }
3870
3871 local->sta_sw_scanning = 1;
3872
3873 rcu_read_lock();
3874 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3875
3876 /* Don't stop the master interface, otherwise we can't transmit
3877 * probes! */
3878 if (sdata->dev == local->mdev)
3879 continue;
3880
3881 netif_stop_queue(sdata->dev);
3882 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3883 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3884 ieee80211_send_nullfunc(local, sdata, 1);
3885 }
3886 rcu_read_unlock();
3887
3888 if (ssid) {
3889 local->scan_ssid_len = ssid_len;
3890 memcpy(local->scan_ssid, ssid, ssid_len);
3891 } else
3892 local->scan_ssid_len = 0;
3893 local->scan_state = SCAN_SET_CHANNEL;
3894 local->scan_channel_idx = 0;
3895 local->scan_band = IEEE80211_BAND_2GHZ;
3896 local->scan_dev = dev;
3897
3898 netif_tx_lock_bh(local->mdev);
3899 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3900 local->ops->configure_filter(local_to_hw(local),
3901 FIF_BCN_PRBRESP_PROMISC,
3902 &local->filter_flags,
3903 local->mdev->mc_count,
3904 local->mdev->mc_list);
3905 netif_tx_unlock_bh(local->mdev);
3906
3907 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3908 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3909 IEEE80211_CHANNEL_TIME);
3910
3911 return 0;
3912 }
3913
3914
3915 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3916 {
3917 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3918 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3919 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3920
3921 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3922 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3923
3924 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3925 if (local->scan_dev == dev)
3926 return 0;
3927 return -EBUSY;
3928 }
3929
3930 ifsta->scan_ssid_len = ssid_len;
3931 if (ssid_len)
3932 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3933 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3934 queue_work(local->hw.workqueue, &ifsta->work);
3935 return 0;
3936 }
3937
3938 static char *
3939 ieee80211_sta_scan_result(struct net_device *dev,
3940 struct ieee80211_sta_bss *bss,
3941 char *current_ev, char *end_buf)
3942 {
3943 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3944 struct iw_event iwe;
3945
3946 if (time_after(jiffies,
3947 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3948 return current_ev;
3949
3950 memset(&iwe, 0, sizeof(iwe));
3951 iwe.cmd = SIOCGIWAP;
3952 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3953 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3954 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3955 IW_EV_ADDR_LEN);
3956
3957 memset(&iwe, 0, sizeof(iwe));
3958 iwe.cmd = SIOCGIWESSID;
3959 if (bss_mesh_cfg(bss)) {
3960 iwe.u.data.length = bss_mesh_id_len(bss);
3961 iwe.u.data.flags = 1;
3962 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3963 bss_mesh_id(bss));
3964 } else {
3965 iwe.u.data.length = bss->ssid_len;
3966 iwe.u.data.flags = 1;
3967 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3968 bss->ssid);
3969 }
3970
3971 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3972 || bss_mesh_cfg(bss)) {
3973 memset(&iwe, 0, sizeof(iwe));
3974 iwe.cmd = SIOCGIWMODE;
3975 if (bss_mesh_cfg(bss))
3976 iwe.u.mode = IW_MODE_MESH;
3977 else if (bss->capability & WLAN_CAPABILITY_ESS)
3978 iwe.u.mode = IW_MODE_MASTER;
3979 else
3980 iwe.u.mode = IW_MODE_ADHOC;
3981 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3982 IW_EV_UINT_LEN);
3983 }
3984
3985 memset(&iwe, 0, sizeof(iwe));
3986 iwe.cmd = SIOCGIWFREQ;
3987 iwe.u.freq.m = bss->freq;
3988 iwe.u.freq.e = 6;
3989 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3990 IW_EV_FREQ_LEN);
3991
3992 memset(&iwe, 0, sizeof(iwe));
3993 iwe.cmd = SIOCGIWFREQ;
3994 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3995 iwe.u.freq.e = 0;
3996 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3997 IW_EV_FREQ_LEN);
3998
3999 memset(&iwe, 0, sizeof(iwe));
4000 iwe.cmd = IWEVQUAL;
4001 iwe.u.qual.qual = bss->signal;
4002 iwe.u.qual.level = bss->rssi;
4003 iwe.u.qual.noise = bss->noise;
4004 iwe.u.qual.updated = local->wstats_flags;
4005 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4006 IW_EV_QUAL_LEN);
4007
4008 memset(&iwe, 0, sizeof(iwe));
4009 iwe.cmd = SIOCGIWENCODE;
4010 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4011 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4012 else
4013 iwe.u.data.flags = IW_ENCODE_DISABLED;
4014 iwe.u.data.length = 0;
4015 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4016
4017 if (bss && bss->wpa_ie) {
4018 memset(&iwe, 0, sizeof(iwe));
4019 iwe.cmd = IWEVGENIE;
4020 iwe.u.data.length = bss->wpa_ie_len;
4021 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4022 bss->wpa_ie);
4023 }
4024
4025 if (bss && bss->rsn_ie) {
4026 memset(&iwe, 0, sizeof(iwe));
4027 iwe.cmd = IWEVGENIE;
4028 iwe.u.data.length = bss->rsn_ie_len;
4029 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4030 bss->rsn_ie);
4031 }
4032
4033 if (bss && bss->supp_rates_len > 0) {
4034 /* display all supported rates in readable format */
4035 char *p = current_ev + IW_EV_LCP_LEN;
4036 int i;
4037
4038 memset(&iwe, 0, sizeof(iwe));
4039 iwe.cmd = SIOCGIWRATE;
4040 /* Those two flags are ignored... */
4041 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4042
4043 for (i = 0; i < bss->supp_rates_len; i++) {
4044 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4045 0x7f) * 500000);
4046 p = iwe_stream_add_value(current_ev, p,
4047 end_buf, &iwe, IW_EV_PARAM_LEN);
4048 }
4049 current_ev = p;
4050 }
4051
4052 if (bss) {
4053 char *buf;
4054 buf = kmalloc(30, GFP_ATOMIC);
4055 if (buf) {
4056 memset(&iwe, 0, sizeof(iwe));
4057 iwe.cmd = IWEVCUSTOM;
4058 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4059 iwe.u.data.length = strlen(buf);
4060 current_ev = iwe_stream_add_point(current_ev, end_buf,
4061 &iwe, buf);
4062 kfree(buf);
4063 }
4064 }
4065
4066 if (bss_mesh_cfg(bss)) {
4067 char *buf;
4068 u8 *cfg = bss_mesh_cfg(bss);
4069 buf = kmalloc(50, GFP_ATOMIC);
4070 if (buf) {
4071 memset(&iwe, 0, sizeof(iwe));
4072 iwe.cmd = IWEVCUSTOM;
4073 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4074 iwe.u.data.length = strlen(buf);
4075 current_ev = iwe_stream_add_point(current_ev, end_buf,
4076 &iwe, buf);
4077 sprintf(buf, "Path Selection Protocol ID: "
4078 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4079 cfg[4]);
4080 iwe.u.data.length = strlen(buf);
4081 current_ev = iwe_stream_add_point(current_ev, end_buf,
4082 &iwe, buf);
4083 sprintf(buf, "Path Selection Metric ID: "
4084 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4085 cfg[8]);
4086 iwe.u.data.length = strlen(buf);
4087 current_ev = iwe_stream_add_point(current_ev, end_buf,
4088 &iwe, buf);
4089 sprintf(buf, "Congestion Control Mode ID: "
4090 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4091 cfg[11], cfg[12]);
4092 iwe.u.data.length = strlen(buf);
4093 current_ev = iwe_stream_add_point(current_ev, end_buf,
4094 &iwe, buf);
4095 sprintf(buf, "Channel Precedence: "
4096 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4097 cfg[15], cfg[16]);
4098 iwe.u.data.length = strlen(buf);
4099 current_ev = iwe_stream_add_point(current_ev, end_buf,
4100 &iwe, buf);
4101 kfree(buf);
4102 }
4103 }
4104
4105 return current_ev;
4106 }
4107
4108
4109 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4110 {
4111 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4112 char *current_ev = buf;
4113 char *end_buf = buf + len;
4114 struct ieee80211_sta_bss *bss;
4115
4116 spin_lock_bh(&local->sta_bss_lock);
4117 list_for_each_entry(bss, &local->sta_bss_list, list) {
4118 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4119 spin_unlock_bh(&local->sta_bss_lock);
4120 return -E2BIG;
4121 }
4122 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4123 end_buf);
4124 }
4125 spin_unlock_bh(&local->sta_bss_lock);
4126 return current_ev - buf;
4127 }
4128
4129
4130 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4131 {
4132 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4133 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4134 kfree(ifsta->extra_ie);
4135 if (len == 0) {
4136 ifsta->extra_ie = NULL;
4137 ifsta->extra_ie_len = 0;
4138 return 0;
4139 }
4140 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4141 if (!ifsta->extra_ie) {
4142 ifsta->extra_ie_len = 0;
4143 return -ENOMEM;
4144 }
4145 memcpy(ifsta->extra_ie, ie, len);
4146 ifsta->extra_ie_len = len;
4147 return 0;
4148 }
4149
4150
4151 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4152 struct sk_buff *skb, u8 *bssid,
4153 u8 *addr)
4154 {
4155 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4156 struct sta_info *sta;
4157 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4158 DECLARE_MAC_BUF(mac);
4159
4160 /* TODO: Could consider removing the least recently used entry and
4161 * allow new one to be added. */
4162 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4163 if (net_ratelimit()) {
4164 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4165 "entry %s\n", dev->name, print_mac(mac, addr));
4166 }
4167 return NULL;
4168 }
4169
4170 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4171 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4172
4173 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4174 if (!sta)
4175 return NULL;
4176
4177 sta->flags |= WLAN_STA_AUTHORIZED;
4178
4179 sta->supp_rates[local->hw.conf.channel->band] =
4180 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4181
4182 rate_control_rate_init(sta, local);
4183
4184 if (sta_info_insert(sta))
4185 return NULL;
4186
4187 return sta;
4188 }
4189
4190
4191 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4192 {
4193 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4194 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4195
4196 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4197 dev->name, reason);
4198
4199 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4200 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4201 return -EINVAL;
4202
4203 ieee80211_send_deauth(dev, ifsta, reason);
4204 ieee80211_set_disassoc(dev, ifsta, 1);
4205 return 0;
4206 }
4207
4208
4209 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4210 {
4211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4212 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4213
4214 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4215 dev->name, reason);
4216
4217 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4218 return -EINVAL;
4219
4220 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4221 return -1;
4222
4223 ieee80211_send_disassoc(dev, ifsta, reason);
4224 ieee80211_set_disassoc(dev, ifsta, 0);
4225 return 0;
4226 }
4227
4228 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4229 enum ieee80211_notification_types notif_type)
4230 {
4231 struct ieee80211_local *local = hw_to_local(hw);
4232 struct ieee80211_sub_if_data *sdata;
4233
4234 switch (notif_type) {
4235 case IEEE80211_NOTIFY_RE_ASSOC:
4236 rcu_read_lock();
4237 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4238
4239 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4240 ieee80211_sta_req_auth(sdata->dev,
4241 &sdata->u.sta);
4242 }
4243
4244 }
4245 rcu_read_unlock();
4246 break;
4247 }
4248 }
4249 EXPORT_SYMBOL(ieee80211_notify_mac);
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